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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:14:06 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 16:14:06 +0000
commiteee068778cb28ecf3c14e1bf843a95547d72c42d (patch)
tree0e07b30ddc5ea579d682d5dbe57998200d1c9ab7 /g10/keygen.c
parentInitial commit. (diff)
downloadgnupg2-eee068778cb28ecf3c14e1bf843a95547d72c42d.tar.xz
gnupg2-eee068778cb28ecf3c14e1bf843a95547d72c42d.zip
Adding upstream version 2.2.40.upstream/2.2.40
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'g10/keygen.c')
-rw-r--r--g10/keygen.c5766
1 files changed, 5766 insertions, 0 deletions
diff --git a/g10/keygen.c b/g10/keygen.c
new file mode 100644
index 0000000..80d65c4
--- /dev/null
+++ b/g10/keygen.c
@@ -0,0 +1,5766 @@
+/* keygen.c - Generate a key pair
+ * Copyright (C) 1998-2007, 2009-2011 Free Software Foundation, Inc.
+ * Copyright (C) 2014, 2015, 2016 Werner Koch
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "gpg.h"
+#include "../common/util.h"
+#include "main.h"
+#include "packet.h"
+#include "../common/ttyio.h"
+#include "options.h"
+#include "keydb.h"
+#include "trustdb.h"
+#include "../common/status.h"
+#include "../common/i18n.h"
+#include "keyserver-internal.h"
+#include "call-agent.h"
+#include "pkglue.h"
+#include "../common/shareddefs.h"
+#include "../common/host2net.h"
+#include "../common/mbox-util.h"
+
+
+/* The default algorithms. You should also check that the value
+ is inside the bounds enforced by ask_keysize and gen_xxx. See also
+ get_keysize_range which encodes the allowed ranges. */
+#define DEFAULT_STD_KEY_PARAM "rsa3072/cert,sign+rsa3072/encr"
+#define FUTURE_STD_KEY_PARAM "ed25519/cert,sign+cv25519/encr"
+
+/* When generating keys using the streamlined key generation dialog,
+ use this as a default expiration interval. */
+const char *default_expiration_interval = "2y";
+
+/* Flag bits used during key generation. */
+#define KEYGEN_FLAG_NO_PROTECTION 1
+#define KEYGEN_FLAG_TRANSIENT_KEY 2
+
+/* Maximum number of supported algorithm preferences. */
+#define MAX_PREFS 30
+
+enum para_name {
+ pKEYTYPE,
+ pKEYLENGTH,
+ pKEYCURVE,
+ pKEYUSAGE,
+ pSUBKEYTYPE,
+ pSUBKEYLENGTH,
+ pSUBKEYCURVE,
+ pSUBKEYUSAGE,
+ pAUTHKEYTYPE,
+ pNAMEREAL,
+ pNAMEEMAIL,
+ pNAMECOMMENT,
+ pPREFERENCES,
+ pREVOKER,
+ pUSERID,
+ pCREATIONDATE,
+ pKEYCREATIONDATE, /* Same in seconds since epoch. */
+ pEXPIREDATE,
+ pKEYEXPIRE, /* in n seconds */
+ pSUBKEYEXPIRE, /* in n seconds */
+ pPASSPHRASE,
+ pSERIALNO,
+ pCARDBACKUPKEY,
+ pHANDLE,
+ pKEYSERVER,
+ pKEYGRIP,
+ pSUBKEYGRIP,
+};
+
+struct para_data_s {
+ struct para_data_s *next;
+ int lnr;
+ enum para_name key;
+ union {
+ u32 expire;
+ u32 creation;
+ unsigned int usage;
+ struct revocation_key revkey;
+ char value[1];
+ } u;
+};
+
+struct output_control_s
+{
+ int lnr;
+ int dryrun;
+ unsigned int keygen_flags;
+ int use_files;
+ struct {
+ char *fname;
+ char *newfname;
+ IOBUF stream;
+ armor_filter_context_t *afx;
+ } pub;
+};
+
+
+struct opaque_data_usage_and_pk {
+ unsigned int usage;
+ PKT_public_key *pk;
+};
+
+
+static int prefs_initialized = 0;
+static byte sym_prefs[MAX_PREFS];
+static int nsym_prefs;
+static byte hash_prefs[MAX_PREFS];
+static int nhash_prefs;
+static byte zip_prefs[MAX_PREFS];
+static int nzip_prefs;
+static int mdc_available,ks_modify;
+
+static gpg_error_t parse_algo_usage_expire (ctrl_t ctrl, int for_subkey,
+ const char *algostr, const char *usagestr,
+ const char *expirestr,
+ int *r_algo, unsigned int *r_usage,
+ u32 *r_expire, unsigned int *r_nbits,
+ const char **r_curve,
+ char **r_keygrip);
+static void do_generate_keypair (ctrl_t ctrl, struct para_data_s *para,
+ struct output_control_s *outctrl, int card );
+static int write_keyblock (iobuf_t out, kbnode_t node);
+static gpg_error_t gen_card_key (int keyno, int algo, int is_primary,
+ kbnode_t pub_root, u32 *timestamp,
+ u32 expireval);
+static unsigned int get_keysize_range (int algo,
+ unsigned int *min, unsigned int *max);
+
+
+
+/* Return the algo string for a default new key. */
+const char *
+get_default_pubkey_algo (void)
+{
+ if (opt.def_new_key_algo)
+ {
+ if (*opt.def_new_key_algo && !strchr (opt.def_new_key_algo, ':'))
+ return opt.def_new_key_algo;
+ /* To avoid checking that option every time we delay that until
+ * here. The only thing we really need to make sure is that
+ * there is no colon in the string so that the --gpgconf-list
+ * command won't mess up its output. */
+ log_info (_("invalid value for option '%s'\n"), "--default-new-key-algo");
+ }
+ return DEFAULT_STD_KEY_PARAM;
+}
+
+
+static void
+print_status_key_created (int letter, PKT_public_key *pk, const char *handle)
+{
+ byte array[MAX_FINGERPRINT_LEN], *s;
+ char *buf, *p;
+ size_t i, n;
+
+ if (!handle)
+ handle = "";
+
+ buf = xmalloc (MAX_FINGERPRINT_LEN*2+31 + strlen (handle) + 1);
+
+ p = buf;
+ if (letter || pk)
+ {
+ *p++ = letter;
+ if (pk)
+ {
+ *p++ = ' ';
+ fingerprint_from_pk (pk, array, &n);
+ s = array;
+ /* Fixme: Use bin2hex */
+ for (i=0; i < n ; i++, s++, p += 2)
+ snprintf (p, 3, "%02X", *s);
+ }
+ }
+ if (*handle)
+ {
+ *p++ = ' ';
+ for (i=0; handle[i] && i < 100; i++)
+ *p++ = isspace ((unsigned int)handle[i])? '_':handle[i];
+ }
+ *p = 0;
+ write_status_text ((letter || pk)?STATUS_KEY_CREATED:STATUS_KEY_NOT_CREATED,
+ buf);
+ xfree (buf);
+}
+
+static void
+print_status_key_not_created (const char *handle)
+{
+ print_status_key_created (0, NULL, handle);
+}
+
+
+
+static gpg_error_t
+write_uid (kbnode_t root, const char *s)
+{
+ PACKET *pkt = xmalloc_clear (sizeof *pkt);
+ size_t n = strlen (s);
+
+ if (n > MAX_UID_PACKET_LENGTH - 10)
+ return gpg_error (GPG_ERR_INV_USER_ID);
+
+ pkt->pkttype = PKT_USER_ID;
+ pkt->pkt.user_id = xmalloc_clear (sizeof *pkt->pkt.user_id + n);
+ pkt->pkt.user_id->len = n;
+ pkt->pkt.user_id->ref = 1;
+ strcpy (pkt->pkt.user_id->name, s);
+ add_kbnode (root, new_kbnode (pkt));
+ return 0;
+}
+
+static void
+do_add_key_flags (PKT_signature *sig, unsigned int use)
+{
+ byte buf[1];
+
+ buf[0] = 0;
+
+ /* The spec says that all primary keys MUST be able to certify. */
+ if(sig->sig_class!=0x18)
+ buf[0] |= 0x01;
+
+ if (use & PUBKEY_USAGE_SIG)
+ buf[0] |= 0x02;
+ if (use & PUBKEY_USAGE_ENC)
+ buf[0] |= 0x04 | 0x08;
+ if (use & PUBKEY_USAGE_AUTH)
+ buf[0] |= 0x20;
+
+ build_sig_subpkt (sig, SIGSUBPKT_KEY_FLAGS, buf, 1);
+}
+
+
+int
+keygen_add_key_expire (PKT_signature *sig, void *opaque)
+{
+ PKT_public_key *pk = opaque;
+ byte buf[8];
+ u32 u;
+
+ if (pk->expiredate)
+ {
+ if (pk->expiredate > pk->timestamp)
+ u = pk->expiredate - pk->timestamp;
+ else
+ u = 1;
+
+ buf[0] = (u >> 24) & 0xff;
+ buf[1] = (u >> 16) & 0xff;
+ buf[2] = (u >> 8) & 0xff;
+ buf[3] = u & 0xff;
+ build_sig_subpkt (sig, SIGSUBPKT_KEY_EXPIRE, buf, 4);
+ }
+ else
+ {
+ /* Make sure we don't leave a key expiration subpacket lying
+ around */
+ delete_sig_subpkt (sig->hashed, SIGSUBPKT_KEY_EXPIRE);
+ }
+
+ return 0;
+}
+
+
+/* Add the key usage (i.e. key flags) in SIG from the public keys
+ * pubkey_usage field. OPAQUE has the public key. */
+int
+keygen_add_key_flags (PKT_signature *sig, void *opaque)
+{
+ PKT_public_key *pk = opaque;
+
+ do_add_key_flags (sig, pk->pubkey_usage);
+ return 0;
+}
+
+
+static int
+keygen_add_key_flags_and_expire (PKT_signature *sig, void *opaque)
+{
+ struct opaque_data_usage_and_pk *oduap = opaque;
+
+ do_add_key_flags (sig, oduap->usage);
+ return keygen_add_key_expire (sig, oduap->pk);
+}
+
+
+static int
+set_one_pref (int val, int type, const char *item, byte *buf, int *nbuf)
+{
+ int i;
+
+ for (i=0; i < *nbuf; i++ )
+ if (buf[i] == val)
+ {
+ log_info (_("preference '%s' duplicated\n"), item);
+ return -1;
+ }
+
+ if (*nbuf >= MAX_PREFS)
+ {
+ if(type==1)
+ log_info(_("too many cipher preferences\n"));
+ else if(type==2)
+ log_info(_("too many digest preferences\n"));
+ else if(type==3)
+ log_info(_("too many compression preferences\n"));
+ else
+ BUG();
+
+ return -1;
+ }
+
+ buf[(*nbuf)++] = val;
+ return 0;
+}
+
+/*
+ * Parse the supplied string and use it to set the standard
+ * preferences. The string may be in a form like the one printed by
+ * "pref" (something like: "S10 S3 H3 H2 Z2 Z1") or the actual
+ * cipher/hash/compress names. Use NULL to set the default
+ * preferences. Returns: 0 = okay
+ */
+int
+keygen_set_std_prefs (const char *string,int personal)
+{
+ byte sym[MAX_PREFS], hash[MAX_PREFS], zip[MAX_PREFS];
+ int nsym=0, nhash=0, nzip=0, val, rc=0;
+ int mdc=1, modify=0; /* mdc defaults on, modify defaults off. */
+ char dummy_string[20*4+1]; /* Enough for 20 items. */
+
+ if (!string || !ascii_strcasecmp (string, "default"))
+ {
+ if (opt.def_preference_list)
+ string=opt.def_preference_list;
+ else
+ {
+ int any_compress = 0;
+ dummy_string[0]='\0';
+
+ /* The rationale why we use the order AES256,192,128 is
+ for compatibility reasons with PGP. If gpg would
+ define AES128 first, we would get the somewhat
+ confusing situation:
+
+ gpg -r pgpkey -r gpgkey ---gives--> AES256
+ gpg -r gpgkey -r pgpkey ---gives--> AES
+
+ Note that by using --personal-cipher-preferences it is
+ possible to prefer AES128.
+ */
+
+ /* Make sure we do not add more than 15 items here, as we
+ could overflow the size of dummy_string. We currently
+ have at most 12. */
+ if ( !openpgp_cipher_test_algo (CIPHER_ALGO_AES256) )
+ strcat(dummy_string,"S9 ");
+ if ( !openpgp_cipher_test_algo (CIPHER_ALGO_AES192) )
+ strcat(dummy_string,"S8 ");
+ if ( !openpgp_cipher_test_algo (CIPHER_ALGO_AES) )
+ strcat(dummy_string,"S7 ");
+ strcat(dummy_string,"S2 "); /* 3DES */
+
+ if (personal)
+ {
+ /* The default internal hash algo order is:
+ * SHA-256, SHA-384, SHA-512, SHA-224, SHA-1.
+ */
+ if (!openpgp_md_test_algo (DIGEST_ALGO_SHA256))
+ strcat (dummy_string, "H8 ");
+
+ if (!openpgp_md_test_algo (DIGEST_ALGO_SHA384))
+ strcat (dummy_string, "H9 ");
+
+ if (!openpgp_md_test_algo (DIGEST_ALGO_SHA512))
+ strcat (dummy_string, "H10 ");
+ }
+ else
+ {
+ /* The default advertised hash algo order is:
+ * SHA-512, SHA-384, SHA-256, SHA-224, SHA-1.
+ */
+ if (!openpgp_md_test_algo (DIGEST_ALGO_SHA512))
+ strcat (dummy_string, "H10 ");
+
+ if (!openpgp_md_test_algo (DIGEST_ALGO_SHA384))
+ strcat (dummy_string, "H9 ");
+
+ if (!openpgp_md_test_algo (DIGEST_ALGO_SHA256))
+ strcat (dummy_string, "H8 ");
+ }
+
+ if (!openpgp_md_test_algo (DIGEST_ALGO_SHA224))
+ strcat (dummy_string, "H11 ");
+
+ strcat (dummy_string, "H2 "); /* SHA-1 */
+
+ if(!check_compress_algo(COMPRESS_ALGO_ZLIB))
+ {
+ strcat(dummy_string,"Z2 ");
+ any_compress = 1;
+ }
+
+ if(!check_compress_algo(COMPRESS_ALGO_BZIP2))
+ {
+ strcat(dummy_string,"Z3 ");
+ any_compress = 1;
+ }
+
+ if(!check_compress_algo(COMPRESS_ALGO_ZIP))
+ {
+ strcat(dummy_string,"Z1 ");
+ any_compress = 1;
+ }
+
+ /* In case we have no compress algo at all, declare that
+ we prefer no compresssion. */
+ if (!any_compress)
+ strcat(dummy_string,"Z0 ");
+
+ /* Remove the trailing space. */
+ if (*dummy_string && dummy_string[strlen (dummy_string)-1] == ' ')
+ dummy_string[strlen (dummy_string)-1] = 0;
+
+ string=dummy_string;
+ }
+ }
+ else if (!ascii_strcasecmp (string, "none"))
+ string = "";
+
+ if(strlen(string))
+ {
+ char *prefstringbuf;
+ char *tok, *prefstring;
+
+ /* We need a writable string. */
+ prefstring = prefstringbuf = xstrdup (string);
+
+ while((tok=strsep(&prefstring," ,")))
+ {
+ if((val=string_to_cipher_algo (tok)))
+ {
+ if(set_one_pref(val,1,tok,sym,&nsym))
+ rc=-1;
+ }
+ else if((val=string_to_digest_algo (tok)))
+ {
+ if(set_one_pref(val,2,tok,hash,&nhash))
+ rc=-1;
+ }
+ else if((val=string_to_compress_algo(tok))>-1)
+ {
+ if(set_one_pref(val,3,tok,zip,&nzip))
+ rc=-1;
+ }
+ else if (ascii_strcasecmp(tok,"mdc")==0)
+ mdc=1;
+ else if (ascii_strcasecmp(tok,"no-mdc")==0)
+ mdc=0;
+ else if (ascii_strcasecmp(tok,"ks-modify")==0)
+ modify=1;
+ else if (ascii_strcasecmp(tok,"no-ks-modify")==0)
+ modify=0;
+ else
+ {
+ log_info (_("invalid item '%s' in preference string\n"),tok);
+ rc=-1;
+ }
+ }
+
+ xfree (prefstringbuf);
+ }
+
+ if(!rc)
+ {
+ if(personal)
+ {
+ if(personal==PREFTYPE_SYM)
+ {
+ xfree(opt.personal_cipher_prefs);
+
+ if(nsym==0)
+ opt.personal_cipher_prefs=NULL;
+ else
+ {
+ int i;
+
+ opt.personal_cipher_prefs=
+ xmalloc(sizeof(prefitem_t *)*(nsym+1));
+
+ for (i=0; i<nsym; i++)
+ {
+ opt.personal_cipher_prefs[i].type = PREFTYPE_SYM;
+ opt.personal_cipher_prefs[i].value = sym[i];
+ }
+
+ opt.personal_cipher_prefs[i].type = PREFTYPE_NONE;
+ opt.personal_cipher_prefs[i].value = 0;
+ }
+ }
+ else if(personal==PREFTYPE_HASH)
+ {
+ xfree(opt.personal_digest_prefs);
+
+ if(nhash==0)
+ opt.personal_digest_prefs=NULL;
+ else
+ {
+ int i;
+
+ opt.personal_digest_prefs=
+ xmalloc(sizeof(prefitem_t *)*(nhash+1));
+
+ for (i=0; i<nhash; i++)
+ {
+ opt.personal_digest_prefs[i].type = PREFTYPE_HASH;
+ opt.personal_digest_prefs[i].value = hash[i];
+ }
+
+ opt.personal_digest_prefs[i].type = PREFTYPE_NONE;
+ opt.personal_digest_prefs[i].value = 0;
+ }
+ }
+ else if(personal==PREFTYPE_ZIP)
+ {
+ xfree(opt.personal_compress_prefs);
+
+ if(nzip==0)
+ opt.personal_compress_prefs=NULL;
+ else
+ {
+ int i;
+
+ opt.personal_compress_prefs=
+ xmalloc(sizeof(prefitem_t *)*(nzip+1));
+
+ for (i=0; i<nzip; i++)
+ {
+ opt.personal_compress_prefs[i].type = PREFTYPE_ZIP;
+ opt.personal_compress_prefs[i].value = zip[i];
+ }
+
+ opt.personal_compress_prefs[i].type = PREFTYPE_NONE;
+ opt.personal_compress_prefs[i].value = 0;
+ }
+ }
+ }
+ else
+ {
+ memcpy (sym_prefs, sym, (nsym_prefs=nsym));
+ memcpy (hash_prefs, hash, (nhash_prefs=nhash));
+ memcpy (zip_prefs, zip, (nzip_prefs=nzip));
+ mdc_available = mdc;
+ ks_modify = modify;
+ prefs_initialized = 1;
+ }
+ }
+
+ return rc;
+}
+
+/* Return a fake user ID containing the preferences. Caller must
+ free. */
+PKT_user_id *
+keygen_get_std_prefs(void)
+{
+ int i,j=0;
+ PKT_user_id *uid=xmalloc_clear(sizeof(PKT_user_id));
+
+ if(!prefs_initialized)
+ keygen_set_std_prefs(NULL,0);
+
+ uid->ref=1;
+
+ uid->prefs=xmalloc((sizeof(prefitem_t *)*
+ (nsym_prefs+nhash_prefs+nzip_prefs+1)));
+
+ for(i=0;i<nsym_prefs;i++,j++)
+ {
+ uid->prefs[j].type=PREFTYPE_SYM;
+ uid->prefs[j].value=sym_prefs[i];
+ }
+
+ for(i=0;i<nhash_prefs;i++,j++)
+ {
+ uid->prefs[j].type=PREFTYPE_HASH;
+ uid->prefs[j].value=hash_prefs[i];
+ }
+
+ for(i=0;i<nzip_prefs;i++,j++)
+ {
+ uid->prefs[j].type=PREFTYPE_ZIP;
+ uid->prefs[j].value=zip_prefs[i];
+ }
+
+ uid->prefs[j].type=PREFTYPE_NONE;
+ uid->prefs[j].value=0;
+
+ uid->flags.mdc=mdc_available;
+ uid->flags.ks_modify=ks_modify;
+
+ return uid;
+}
+
+static void
+add_feature_mdc (PKT_signature *sig,int enabled)
+{
+ const byte *s;
+ size_t n;
+ int i;
+ char *buf;
+
+ s = parse_sig_subpkt (sig->hashed, SIGSUBPKT_FEATURES, &n );
+ /* Already set or cleared */
+ if (s && n &&
+ ((enabled && (s[0] & 0x01)) || (!enabled && !(s[0] & 0x01))))
+ return;
+
+ if (!s || !n) { /* create a new one */
+ n = 1;
+ buf = xmalloc_clear (n);
+ }
+ else {
+ buf = xmalloc (n);
+ memcpy (buf, s, n);
+ }
+
+ if(enabled)
+ buf[0] |= 0x01; /* MDC feature */
+ else
+ buf[0] &= ~0x01;
+
+ /* Are there any bits set? */
+ for(i=0;i<n;i++)
+ if(buf[i]!=0)
+ break;
+
+ if(i==n)
+ delete_sig_subpkt (sig->hashed, SIGSUBPKT_FEATURES);
+ else
+ build_sig_subpkt (sig, SIGSUBPKT_FEATURES, buf, n);
+
+ xfree (buf);
+}
+
+static void
+add_keyserver_modify (PKT_signature *sig,int enabled)
+{
+ const byte *s;
+ size_t n;
+ int i;
+ char *buf;
+
+ /* The keyserver modify flag is a negative flag (i.e. no-modify) */
+ enabled=!enabled;
+
+ s = parse_sig_subpkt (sig->hashed, SIGSUBPKT_KS_FLAGS, &n );
+ /* Already set or cleared */
+ if (s && n &&
+ ((enabled && (s[0] & 0x80)) || (!enabled && !(s[0] & 0x80))))
+ return;
+
+ if (!s || !n) { /* create a new one */
+ n = 1;
+ buf = xmalloc_clear (n);
+ }
+ else {
+ buf = xmalloc (n);
+ memcpy (buf, s, n);
+ }
+
+ if(enabled)
+ buf[0] |= 0x80; /* no-modify flag */
+ else
+ buf[0] &= ~0x80;
+
+ /* Are there any bits set? */
+ for(i=0;i<n;i++)
+ if(buf[i]!=0)
+ break;
+
+ if(i==n)
+ delete_sig_subpkt (sig->hashed, SIGSUBPKT_KS_FLAGS);
+ else
+ build_sig_subpkt (sig, SIGSUBPKT_KS_FLAGS, buf, n);
+
+ xfree (buf);
+}
+
+
+int
+keygen_upd_std_prefs (PKT_signature *sig, void *opaque)
+{
+ (void)opaque;
+
+ if (!prefs_initialized)
+ keygen_set_std_prefs (NULL, 0);
+
+ if (nsym_prefs)
+ build_sig_subpkt (sig, SIGSUBPKT_PREF_SYM, sym_prefs, nsym_prefs);
+ else
+ {
+ delete_sig_subpkt (sig->hashed, SIGSUBPKT_PREF_SYM);
+ delete_sig_subpkt (sig->unhashed, SIGSUBPKT_PREF_SYM);
+ }
+
+ if (nhash_prefs)
+ build_sig_subpkt (sig, SIGSUBPKT_PREF_HASH, hash_prefs, nhash_prefs);
+ else
+ {
+ delete_sig_subpkt (sig->hashed, SIGSUBPKT_PREF_HASH);
+ delete_sig_subpkt (sig->unhashed, SIGSUBPKT_PREF_HASH);
+ }
+
+ if (nzip_prefs)
+ build_sig_subpkt (sig, SIGSUBPKT_PREF_COMPR, zip_prefs, nzip_prefs);
+ else
+ {
+ delete_sig_subpkt (sig->hashed, SIGSUBPKT_PREF_COMPR);
+ delete_sig_subpkt (sig->unhashed, SIGSUBPKT_PREF_COMPR);
+ }
+
+ /* Make sure that the MDC feature flag is set if needed. */
+ add_feature_mdc (sig,mdc_available);
+ add_keyserver_modify (sig,ks_modify);
+ keygen_add_keyserver_url(sig,NULL);
+
+ return 0;
+}
+
+
+/****************
+ * Add preference to the self signature packet.
+ * This is only called for packets with version > 3.
+ */
+int
+keygen_add_std_prefs (PKT_signature *sig, void *opaque)
+{
+ PKT_public_key *pk = opaque;
+
+ do_add_key_flags (sig, pk->pubkey_usage);
+ keygen_add_key_expire (sig, opaque );
+ keygen_upd_std_prefs (sig, opaque);
+ keygen_add_keyserver_url (sig,NULL);
+
+ return 0;
+}
+
+int
+keygen_add_keyserver_url(PKT_signature *sig, void *opaque)
+{
+ const char *url=opaque;
+
+ if(!url)
+ url=opt.def_keyserver_url;
+
+ if(url)
+ build_sig_subpkt(sig,SIGSUBPKT_PREF_KS,url,strlen(url));
+ else
+ delete_sig_subpkt (sig->hashed,SIGSUBPKT_PREF_KS);
+
+ return 0;
+}
+
+int
+keygen_add_notations(PKT_signature *sig,void *opaque)
+{
+ struct notation *notation;
+
+ /* We always start clean */
+ delete_sig_subpkt(sig->hashed,SIGSUBPKT_NOTATION);
+ delete_sig_subpkt(sig->unhashed,SIGSUBPKT_NOTATION);
+ sig->flags.notation=0;
+
+ for(notation=opaque;notation;notation=notation->next)
+ if(!notation->flags.ignore)
+ {
+ unsigned char *buf;
+ unsigned int n1,n2;
+
+ n1=strlen(notation->name);
+ if(notation->altvalue)
+ n2=strlen(notation->altvalue);
+ else if(notation->bdat)
+ n2=notation->blen;
+ else
+ n2=strlen(notation->value);
+
+ buf = xmalloc( 8 + n1 + n2 );
+
+ /* human readable or not */
+ buf[0] = notation->bdat?0:0x80;
+ buf[1] = buf[2] = buf[3] = 0;
+ buf[4] = n1 >> 8;
+ buf[5] = n1;
+ buf[6] = n2 >> 8;
+ buf[7] = n2;
+ memcpy(buf+8, notation->name, n1 );
+ if(notation->altvalue)
+ memcpy(buf+8+n1, notation->altvalue, n2 );
+ else if(notation->bdat)
+ memcpy(buf+8+n1, notation->bdat, n2 );
+ else
+ memcpy(buf+8+n1, notation->value, n2 );
+ build_sig_subpkt( sig, SIGSUBPKT_NOTATION |
+ (notation->flags.critical?SIGSUBPKT_FLAG_CRITICAL:0),
+ buf, 8+n1+n2 );
+ xfree(buf);
+ }
+
+ return 0;
+}
+
+int
+keygen_add_revkey (PKT_signature *sig, void *opaque)
+{
+ struct revocation_key *revkey = opaque;
+ byte buf[2+MAX_FINGERPRINT_LEN];
+
+ buf[0] = revkey->class;
+ buf[1] = revkey->algid;
+ memcpy (&buf[2], revkey->fpr, MAX_FINGERPRINT_LEN);
+
+ build_sig_subpkt (sig, SIGSUBPKT_REV_KEY, buf, 2+MAX_FINGERPRINT_LEN);
+
+ /* All sigs with revocation keys set are nonrevocable. */
+ sig->flags.revocable = 0;
+ buf[0] = 0;
+ build_sig_subpkt (sig, SIGSUBPKT_REVOCABLE, buf, 1);
+
+ parse_revkeys (sig);
+
+ return 0;
+}
+
+
+
+/* Create a back-signature. If TIMESTAMP is not NULL, use it for the
+ signature creation time. */
+gpg_error_t
+make_backsig (ctrl_t ctrl, PKT_signature *sig, PKT_public_key *pk,
+ PKT_public_key *sub_pk, PKT_public_key *sub_psk,
+ u32 timestamp, const char *cache_nonce)
+{
+ gpg_error_t err;
+ PKT_signature *backsig;
+
+ cache_public_key (sub_pk);
+
+ err = make_keysig_packet (ctrl, &backsig, pk, NULL, sub_pk, sub_psk, 0x19,
+ 0, timestamp, 0, NULL, NULL, cache_nonce);
+ if (err)
+ log_error ("make_keysig_packet failed for backsig: %s\n",
+ gpg_strerror (err));
+ else
+ {
+ /* Get it into a binary packed form. */
+ IOBUF backsig_out = iobuf_temp();
+ PACKET backsig_pkt;
+
+ init_packet (&backsig_pkt);
+ backsig_pkt.pkttype = PKT_SIGNATURE;
+ backsig_pkt.pkt.signature = backsig;
+ err = build_packet (backsig_out, &backsig_pkt);
+ free_packet (&backsig_pkt, NULL);
+ if (err)
+ log_error ("build_packet failed for backsig: %s\n", gpg_strerror (err));
+ else
+ {
+ size_t pktlen = 0;
+ byte *buf = iobuf_get_temp_buffer (backsig_out);
+
+ /* Remove the packet header. */
+ if(buf[0]&0x40)
+ {
+ if (buf[1] < 192)
+ {
+ pktlen = buf[1];
+ buf += 2;
+ }
+ else if(buf[1] < 224)
+ {
+ pktlen = (buf[1]-192)*256;
+ pktlen += buf[2]+192;
+ buf += 3;
+ }
+ else if (buf[1] == 255)
+ {
+ pktlen = buf32_to_size_t (buf+2);
+ buf += 6;
+ }
+ else
+ BUG ();
+ }
+ else
+ {
+ int mark = 1;
+
+ switch (buf[0]&3)
+ {
+ case 3:
+ BUG ();
+ break;
+
+ case 2:
+ pktlen = (size_t)buf[mark++] << 24;
+ pktlen |= buf[mark++] << 16;
+ /* fall through */
+ case 1:
+ pktlen |= buf[mark++] << 8;
+ /* fall through */
+ case 0:
+ pktlen |= buf[mark++];
+ }
+
+ buf += mark;
+ }
+
+ /* Now make the binary blob into a subpacket. */
+ build_sig_subpkt (sig, SIGSUBPKT_SIGNATURE, buf, pktlen);
+
+ iobuf_close (backsig_out);
+ }
+ }
+
+ return err;
+}
+
+
+/* Write a direct key signature to the first key in ROOT using the key
+ PSK. REVKEY is describes the direct key signature and TIMESTAMP is
+ the timestamp to set on the signature. */
+static gpg_error_t
+write_direct_sig (ctrl_t ctrl, kbnode_t root, PKT_public_key *psk,
+ struct revocation_key *revkey, u32 timestamp,
+ const char *cache_nonce)
+{
+ gpg_error_t err;
+ PACKET *pkt;
+ PKT_signature *sig;
+ KBNODE node;
+ PKT_public_key *pk;
+
+ if (opt.verbose)
+ log_info (_("writing direct signature\n"));
+
+ /* Get the pk packet from the pub_tree. */
+ node = find_kbnode (root, PKT_PUBLIC_KEY);
+ if (!node)
+ BUG ();
+ pk = node->pkt->pkt.public_key;
+
+ /* We have to cache the key, so that the verification of the
+ signature creation is able to retrieve the public key. */
+ cache_public_key (pk);
+
+ /* Make the signature. */
+ err = make_keysig_packet (ctrl, &sig, pk, NULL,NULL, psk, 0x1F,
+ 0, timestamp, 0,
+ keygen_add_revkey, revkey, cache_nonce);
+ if (err)
+ {
+ log_error ("make_keysig_packet failed: %s\n", gpg_strerror (err) );
+ return err;
+ }
+
+ pkt = xmalloc_clear (sizeof *pkt);
+ pkt->pkttype = PKT_SIGNATURE;
+ pkt->pkt.signature = sig;
+ add_kbnode (root, new_kbnode (pkt));
+ return err;
+}
+
+
+
+/* Write a self-signature to the first user id in ROOT using the key
+ PSK. USE and TIMESTAMP give the extra data we need for the
+ signature. */
+static gpg_error_t
+write_selfsigs (ctrl_t ctrl, kbnode_t root, PKT_public_key *psk,
+ unsigned int use, u32 timestamp, const char *cache_nonce)
+{
+ gpg_error_t err;
+ PACKET *pkt;
+ PKT_signature *sig;
+ PKT_user_id *uid;
+ KBNODE node;
+ PKT_public_key *pk;
+
+ if (opt.verbose)
+ log_info (_("writing self signature\n"));
+
+ /* Get the uid packet from the list. */
+ node = find_kbnode (root, PKT_USER_ID);
+ if (!node)
+ BUG(); /* No user id packet in tree. */
+ uid = node->pkt->pkt.user_id;
+
+ /* Get the pk packet from the pub_tree. */
+ node = find_kbnode (root, PKT_PUBLIC_KEY);
+ if (!node)
+ BUG();
+ pk = node->pkt->pkt.public_key;
+
+ /* The usage has not yet been set - do it now. */
+ pk->pubkey_usage = use;
+
+ /* We have to cache the key, so that the verification of the
+ signature creation is able to retrieve the public key. */
+ cache_public_key (pk);
+
+ /* Make the signature. */
+ err = make_keysig_packet (ctrl, &sig, pk, uid, NULL, psk, 0x13,
+ 0, timestamp, 0,
+ keygen_add_std_prefs, pk, cache_nonce);
+ if (err)
+ {
+ log_error ("make_keysig_packet failed: %s\n", gpg_strerror (err));
+ return err;
+ }
+
+ pkt = xmalloc_clear (sizeof *pkt);
+ pkt->pkttype = PKT_SIGNATURE;
+ pkt->pkt.signature = sig;
+ add_kbnode (root, new_kbnode (pkt));
+
+ return err;
+}
+
+
+/* Write the key binding signature. If TIMESTAMP is not NULL use the
+ signature creation time. PRI_PSK is the key use for signing.
+ SUB_PSK is a key used to create a back-signature; that one is only
+ used if USE has the PUBKEY_USAGE_SIG capability. */
+static int
+write_keybinding (ctrl_t ctrl, kbnode_t root,
+ PKT_public_key *pri_psk, PKT_public_key *sub_psk,
+ unsigned int use, u32 timestamp, const char *cache_nonce)
+{
+ gpg_error_t err;
+ PACKET *pkt;
+ PKT_signature *sig;
+ KBNODE node;
+ PKT_public_key *pri_pk, *sub_pk;
+ struct opaque_data_usage_and_pk oduap;
+
+ if (opt.verbose)
+ log_info(_("writing key binding signature\n"));
+
+ /* Get the primary pk packet from the tree. */
+ node = find_kbnode (root, PKT_PUBLIC_KEY);
+ if (!node)
+ BUG();
+ pri_pk = node->pkt->pkt.public_key;
+
+ /* We have to cache the key, so that the verification of the
+ * signature creation is able to retrieve the public key. */
+ cache_public_key (pri_pk);
+
+ /* Find the last subkey. */
+ sub_pk = NULL;
+ for (node = root; node; node = node->next )
+ {
+ if (node->pkt->pkttype == PKT_PUBLIC_SUBKEY)
+ sub_pk = node->pkt->pkt.public_key;
+ }
+ if (!sub_pk)
+ BUG();
+
+ /* Make the signature. */
+ oduap.usage = use;
+ oduap.pk = sub_pk;
+ err = make_keysig_packet (ctrl, &sig, pri_pk, NULL, sub_pk, pri_psk, 0x18,
+ 0, timestamp, 0,
+ keygen_add_key_flags_and_expire, &oduap,
+ cache_nonce);
+ if (err)
+ {
+ log_error ("make_keysig_packeto failed: %s\n", gpg_strerror (err));
+ return err;
+ }
+
+ /* Make a backsig. */
+ if (use & PUBKEY_USAGE_SIG)
+ {
+ err = make_backsig (ctrl,
+ sig, pri_pk, sub_pk, sub_psk, timestamp, cache_nonce);
+ if (err)
+ return err;
+ }
+
+ pkt = xmalloc_clear ( sizeof *pkt );
+ pkt->pkttype = PKT_SIGNATURE;
+ pkt->pkt.signature = sig;
+ add_kbnode (root, new_kbnode (pkt) );
+ return err;
+}
+
+
+static gpg_error_t
+ecckey_from_sexp (gcry_mpi_t *array, gcry_sexp_t sexp, int algo)
+{
+ gpg_error_t err;
+ gcry_sexp_t list, l2;
+ char *curve = NULL;
+ int i;
+ const char *oidstr;
+ unsigned int nbits;
+
+ array[0] = NULL;
+ array[1] = NULL;
+ array[2] = NULL;
+
+ list = gcry_sexp_find_token (sexp, "public-key", 0);
+ if (!list)
+ return gpg_error (GPG_ERR_INV_OBJ);
+ l2 = gcry_sexp_cadr (list);
+ gcry_sexp_release (list);
+ list = l2;
+ if (!list)
+ return gpg_error (GPG_ERR_NO_OBJ);
+
+ l2 = gcry_sexp_find_token (list, "curve", 0);
+ if (!l2)
+ {
+ err = gpg_error (GPG_ERR_NO_OBJ);
+ goto leave;
+ }
+ curve = gcry_sexp_nth_string (l2, 1);
+ if (!curve)
+ {
+ err = gpg_error (GPG_ERR_NO_OBJ);
+ goto leave;
+ }
+ gcry_sexp_release (l2);
+ oidstr = openpgp_curve_to_oid (curve, &nbits, NULL);
+ if (!oidstr)
+ {
+ /* That can't happen because we used one of the curves
+ gpg_curve_to_oid knows about. */
+ err = gpg_error (GPG_ERR_INV_OBJ);
+ goto leave;
+ }
+ err = openpgp_oid_from_str (oidstr, &array[0]);
+ if (err)
+ goto leave;
+
+ l2 = gcry_sexp_find_token (list, "q", 0);
+ if (!l2)
+ {
+ err = gpg_error (GPG_ERR_NO_OBJ);
+ goto leave;
+ }
+ array[1] = gcry_sexp_nth_mpi (l2, 1, GCRYMPI_FMT_USG);
+ gcry_sexp_release (l2);
+ if (!array[1])
+ {
+ err = gpg_error (GPG_ERR_INV_OBJ);
+ goto leave;
+ }
+ gcry_sexp_release (list);
+
+ if (algo == PUBKEY_ALGO_ECDH)
+ {
+ array[2] = pk_ecdh_default_params (nbits);
+ if (!array[2])
+ {
+ err = gpg_error_from_syserror ();
+ goto leave;
+ }
+ }
+
+ leave:
+ xfree (curve);
+ if (err)
+ {
+ for (i=0; i < 3; i++)
+ {
+ gcry_mpi_release (array[i]);
+ array[i] = NULL;
+ }
+ }
+ return err;
+}
+
+
+/* Extract key parameters from SEXP and store them in ARRAY. ELEMS is
+ a string where each character denotes a parameter name. TOPNAME is
+ the name of the top element above the elements. */
+static int
+key_from_sexp (gcry_mpi_t *array, gcry_sexp_t sexp,
+ const char *topname, const char *elems)
+{
+ gcry_sexp_t list, l2;
+ const char *s;
+ int i, idx;
+ int rc = 0;
+
+ list = gcry_sexp_find_token (sexp, topname, 0);
+ if (!list)
+ return gpg_error (GPG_ERR_INV_OBJ);
+ l2 = gcry_sexp_cadr (list);
+ gcry_sexp_release (list);
+ list = l2;
+ if (!list)
+ return gpg_error (GPG_ERR_NO_OBJ);
+
+ for (idx=0,s=elems; *s; s++, idx++)
+ {
+ l2 = gcry_sexp_find_token (list, s, 1);
+ if (!l2)
+ {
+ rc = gpg_error (GPG_ERR_NO_OBJ); /* required parameter not found */
+ goto leave;
+ }
+ array[idx] = gcry_sexp_nth_mpi (l2, 1, GCRYMPI_FMT_USG);
+ gcry_sexp_release (l2);
+ if (!array[idx])
+ {
+ rc = gpg_error (GPG_ERR_INV_OBJ); /* required parameter invalid */
+ goto leave;
+ }
+ }
+ gcry_sexp_release (list);
+
+ leave:
+ if (rc)
+ {
+ for (i=0; i<idx; i++)
+ {
+ gcry_mpi_release (array[i]);
+ array[i] = NULL;
+ }
+ gcry_sexp_release (list);
+ }
+ return rc;
+}
+
+
+/* Create a keyblock using the given KEYGRIP. ALGO is the OpenPGP
+ algorithm of that keygrip. */
+static int
+do_create_from_keygrip (ctrl_t ctrl, int algo, const char *hexkeygrip,
+ kbnode_t pub_root, u32 timestamp, u32 expireval,
+ int is_subkey)
+{
+ int err;
+ PACKET *pkt;
+ PKT_public_key *pk;
+ gcry_sexp_t s_key;
+ const char *algoelem;
+
+ if (hexkeygrip[0] == '&')
+ hexkeygrip++;
+
+ switch (algo)
+ {
+ case PUBKEY_ALGO_RSA: algoelem = "ne"; break;
+ case PUBKEY_ALGO_DSA: algoelem = "pqgy"; break;
+ case PUBKEY_ALGO_ELGAMAL_E: algoelem = "pgy"; break;
+ case PUBKEY_ALGO_ECDH:
+ case PUBKEY_ALGO_ECDSA: algoelem = ""; break;
+ case PUBKEY_ALGO_EDDSA: algoelem = ""; break;
+ default: return gpg_error (GPG_ERR_INTERNAL);
+ }
+
+
+ /* Ask the agent for the public key matching HEXKEYGRIP. */
+ {
+ unsigned char *public;
+
+ err = agent_readkey (ctrl, 0, hexkeygrip, &public);
+ if (err)
+ return err;
+ err = gcry_sexp_sscan (&s_key, NULL,
+ public, gcry_sexp_canon_len (public, 0, NULL, NULL));
+ xfree (public);
+ if (err)
+ return err;
+ }
+
+ /* Build a public key packet. */
+ pk = xtrycalloc (1, sizeof *pk);
+ if (!pk)
+ {
+ err = gpg_error_from_syserror ();
+ gcry_sexp_release (s_key);
+ return err;
+ }
+
+ pk->timestamp = timestamp;
+ pk->version = 4;
+ if (expireval)
+ pk->expiredate = pk->timestamp + expireval;
+ pk->pubkey_algo = algo;
+
+ if (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_ECDH )
+ err = ecckey_from_sexp (pk->pkey, s_key, algo);
+ else
+ err = key_from_sexp (pk->pkey, s_key, "public-key", algoelem);
+ if (err)
+ {
+ log_error ("key_from_sexp failed: %s\n", gpg_strerror (err) );
+ gcry_sexp_release (s_key);
+ free_public_key (pk);
+ return err;
+ }
+ gcry_sexp_release (s_key);
+
+ pkt = xtrycalloc (1, sizeof *pkt);
+ if (!pkt)
+ {
+ err = gpg_error_from_syserror ();
+ free_public_key (pk);
+ return err;
+ }
+
+ pkt->pkttype = is_subkey ? PKT_PUBLIC_SUBKEY : PKT_PUBLIC_KEY;
+ pkt->pkt.public_key = pk;
+ add_kbnode (pub_root, new_kbnode (pkt));
+
+ return 0;
+}
+
+
+/* Common code for the key generation function gen_xxx. */
+static int
+common_gen (const char *keyparms, int algo, const char *algoelem,
+ kbnode_t pub_root, u32 timestamp, u32 expireval, int is_subkey,
+ int keygen_flags, const char *passphrase,
+ char **cache_nonce_addr, char **passwd_nonce_addr)
+{
+ int err;
+ PACKET *pkt;
+ PKT_public_key *pk;
+ gcry_sexp_t s_key;
+
+ err = agent_genkey (NULL, cache_nonce_addr, passwd_nonce_addr, keyparms,
+ !!(keygen_flags & KEYGEN_FLAG_NO_PROTECTION),
+ passphrase, timestamp,
+ &s_key);
+ if (err)
+ {
+ log_error ("agent_genkey failed: %s\n", gpg_strerror (err) );
+ return err;
+ }
+
+ pk = xtrycalloc (1, sizeof *pk);
+ if (!pk)
+ {
+ err = gpg_error_from_syserror ();
+ gcry_sexp_release (s_key);
+ return err;
+ }
+
+ pk->timestamp = timestamp;
+ pk->version = 4;
+ if (expireval)
+ pk->expiredate = pk->timestamp + expireval;
+ pk->pubkey_algo = algo;
+
+ if (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_ECDH )
+ err = ecckey_from_sexp (pk->pkey, s_key, algo);
+ else
+ err = key_from_sexp (pk->pkey, s_key, "public-key", algoelem);
+ if (err)
+ {
+ log_error ("key_from_sexp failed: %s\n", gpg_strerror (err) );
+ gcry_sexp_release (s_key);
+ free_public_key (pk);
+ return err;
+ }
+ gcry_sexp_release (s_key);
+
+ pkt = xtrycalloc (1, sizeof *pkt);
+ if (!pkt)
+ {
+ err = gpg_error_from_syserror ();
+ free_public_key (pk);
+ return err;
+ }
+
+ pkt->pkttype = is_subkey ? PKT_PUBLIC_SUBKEY : PKT_PUBLIC_KEY;
+ pkt->pkt.public_key = pk;
+ add_kbnode (pub_root, new_kbnode (pkt));
+
+ return 0;
+}
+
+
+/*
+ * Generate an Elgamal key.
+ */
+static int
+gen_elg (int algo, unsigned int nbits, KBNODE pub_root,
+ u32 timestamp, u32 expireval, int is_subkey,
+ int keygen_flags, const char *passphrase,
+ char **cache_nonce_addr, char **passwd_nonce_addr)
+{
+ int err;
+ char *keyparms;
+ char nbitsstr[35];
+
+ log_assert (is_ELGAMAL (algo));
+
+ if (nbits < 1024)
+ {
+ nbits = 2048;
+ log_info (_("keysize invalid; using %u bits\n"), nbits );
+ }
+ else if (nbits > 4096)
+ {
+ nbits = 4096;
+ log_info (_("keysize invalid; using %u bits\n"), nbits );
+ }
+
+ if ((nbits % 32))
+ {
+ nbits = ((nbits + 31) / 32) * 32;
+ log_info (_("keysize rounded up to %u bits\n"), nbits );
+ }
+
+ /* Note that we use transient-key only if no-protection has also
+ been enabled. */
+ snprintf (nbitsstr, sizeof nbitsstr, "%u", nbits);
+ keyparms = xtryasprintf ("(genkey(%s(nbits %zu:%s)%s))",
+ algo == GCRY_PK_ELG_E ? "openpgp-elg" :
+ algo == GCRY_PK_ELG ? "elg" : "x-oops" ,
+ strlen (nbitsstr), nbitsstr,
+ ((keygen_flags & KEYGEN_FLAG_TRANSIENT_KEY)
+ && (keygen_flags & KEYGEN_FLAG_NO_PROTECTION))?
+ "(transient-key)" : "" );
+ if (!keyparms)
+ err = gpg_error_from_syserror ();
+ else
+ {
+ err = common_gen (keyparms, algo, "pgy",
+ pub_root, timestamp, expireval, is_subkey,
+ keygen_flags, passphrase,
+ cache_nonce_addr, passwd_nonce_addr);
+ xfree (keyparms);
+ }
+
+ return err;
+}
+
+
+/*
+ * Generate an DSA key
+ */
+static gpg_error_t
+gen_dsa (unsigned int nbits, KBNODE pub_root,
+ u32 timestamp, u32 expireval, int is_subkey,
+ int keygen_flags, const char *passphrase,
+ char **cache_nonce_addr, char **passwd_nonce_addr)
+{
+ int err;
+ unsigned int qbits;
+ char *keyparms;
+ char nbitsstr[35];
+ char qbitsstr[35];
+
+ if (nbits < 768)
+ {
+ nbits = 2048;
+ log_info(_("keysize invalid; using %u bits\n"), nbits );
+ }
+ else if ( nbits > 3072 )
+ {
+ nbits = 3072;
+ log_info(_("keysize invalid; using %u bits\n"), nbits );
+ }
+
+ if( (nbits % 64) )
+ {
+ nbits = ((nbits + 63) / 64) * 64;
+ log_info(_("keysize rounded up to %u bits\n"), nbits );
+ }
+
+ /* To comply with FIPS rules we round up to the next value unless in
+ expert mode. */
+ if (!opt.expert && nbits > 1024 && (nbits % 1024))
+ {
+ nbits = ((nbits + 1023) / 1024) * 1024;
+ log_info(_("keysize rounded up to %u bits\n"), nbits );
+ }
+
+ /*
+ Figure out a q size based on the key size. FIPS 180-3 says:
+
+ L = 1024, N = 160
+ L = 2048, N = 224
+ L = 2048, N = 256
+ L = 3072, N = 256
+
+ 2048/256 is an odd pair since there is also a 2048/224 and
+ 3072/256. Matching sizes is not a very exact science.
+
+ We'll do 256 qbits for nbits over 2047, 224 for nbits over 1024
+ but less than 2048, and 160 for 1024 (DSA1).
+ */
+
+ if (nbits > 2047)
+ qbits = 256;
+ else if ( nbits > 1024)
+ qbits = 224;
+ else
+ qbits = 160;
+
+ if (qbits != 160 )
+ log_info (_("WARNING: some OpenPGP programs can't"
+ " handle a DSA key with this digest size\n"));
+
+ snprintf (nbitsstr, sizeof nbitsstr, "%u", nbits);
+ snprintf (qbitsstr, sizeof qbitsstr, "%u", qbits);
+ keyparms = xtryasprintf ("(genkey(dsa(nbits %zu:%s)(qbits %zu:%s)%s))",
+ strlen (nbitsstr), nbitsstr,
+ strlen (qbitsstr), qbitsstr,
+ ((keygen_flags & KEYGEN_FLAG_TRANSIENT_KEY)
+ && (keygen_flags & KEYGEN_FLAG_NO_PROTECTION))?
+ "(transient-key)" : "" );
+ if (!keyparms)
+ err = gpg_error_from_syserror ();
+ else
+ {
+ err = common_gen (keyparms, PUBKEY_ALGO_DSA, "pqgy",
+ pub_root, timestamp, expireval, is_subkey,
+ keygen_flags, passphrase,
+ cache_nonce_addr, passwd_nonce_addr);
+ xfree (keyparms);
+ }
+
+ return err;
+}
+
+
+
+/*
+ * Generate an ECC key
+ */
+static gpg_error_t
+gen_ecc (int algo, const char *curve, kbnode_t pub_root,
+ u32 timestamp, u32 expireval, int is_subkey,
+ int keygen_flags, const char *passphrase,
+ char **cache_nonce_addr, char **passwd_nonce_addr)
+{
+ gpg_error_t err;
+ char *keyparms;
+
+ log_assert (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_ECDH);
+
+ if (!curve || !*curve)
+ return gpg_error (GPG_ERR_UNKNOWN_CURVE);
+
+ /* Map the displayed short forms of some curves to their canonical
+ * names. */
+ if (!ascii_strcasecmp (curve, "cv25519"))
+ curve = "Curve25519";
+ else if (!ascii_strcasecmp (curve, "ed25519"))
+ curve = "Ed25519";
+
+ /* Note that we use the "comp" flag with EdDSA to request the use of
+ a 0x40 compression prefix octet. */
+ if (algo == PUBKEY_ALGO_EDDSA)
+ keyparms = xtryasprintf
+ ("(genkey(ecc(curve %zu:%s)(flags eddsa comp%s)))",
+ strlen (curve), curve,
+ (((keygen_flags & KEYGEN_FLAG_TRANSIENT_KEY)
+ && (keygen_flags & KEYGEN_FLAG_NO_PROTECTION))?
+ " transient-key" : ""));
+ else if (algo == PUBKEY_ALGO_ECDH && !strcmp (curve, "Curve25519"))
+ keyparms = xtryasprintf
+ ("(genkey(ecc(curve %zu:%s)(flags djb-tweak comp%s)))",
+ strlen (curve), curve,
+ (((keygen_flags & KEYGEN_FLAG_TRANSIENT_KEY)
+ && (keygen_flags & KEYGEN_FLAG_NO_PROTECTION))?
+ " transient-key" : ""));
+ else
+ keyparms = xtryasprintf
+ ("(genkey(ecc(curve %zu:%s)(flags nocomp%s)))",
+ strlen (curve), curve,
+ (((keygen_flags & KEYGEN_FLAG_TRANSIENT_KEY)
+ && (keygen_flags & KEYGEN_FLAG_NO_PROTECTION))?
+ " transient-key" : ""));
+
+ if (!keyparms)
+ err = gpg_error_from_syserror ();
+ else
+ {
+ err = common_gen (keyparms, algo, "",
+ pub_root, timestamp, expireval, is_subkey,
+ keygen_flags, passphrase,
+ cache_nonce_addr, passwd_nonce_addr);
+ xfree (keyparms);
+ }
+
+ return err;
+}
+
+
+/*
+ * Generate an RSA key.
+ */
+static int
+gen_rsa (int algo, unsigned int nbits, KBNODE pub_root,
+ u32 timestamp, u32 expireval, int is_subkey,
+ int keygen_flags, const char *passphrase,
+ char **cache_nonce_addr, char **passwd_nonce_addr)
+{
+ int err;
+ char *keyparms;
+ char nbitsstr[35];
+ const unsigned maxsize = (opt.flags.large_rsa ? 8192 : 4096);
+
+ log_assert (is_RSA(algo));
+
+ if (!nbits)
+ nbits = get_keysize_range (algo, NULL, NULL);
+
+ if (nbits < 1024)
+ {
+ nbits = 3072;
+ log_info (_("keysize invalid; using %u bits\n"), nbits );
+ }
+ else if (nbits > maxsize)
+ {
+ nbits = maxsize;
+ log_info (_("keysize invalid; using %u bits\n"), nbits );
+ }
+
+ if ((nbits % 32))
+ {
+ nbits = ((nbits + 31) / 32) * 32;
+ log_info (_("keysize rounded up to %u bits\n"), nbits );
+ }
+
+ snprintf (nbitsstr, sizeof nbitsstr, "%u", nbits);
+ keyparms = xtryasprintf ("(genkey(rsa(nbits %zu:%s)%s))",
+ strlen (nbitsstr), nbitsstr,
+ ((keygen_flags & KEYGEN_FLAG_TRANSIENT_KEY)
+ && (keygen_flags & KEYGEN_FLAG_NO_PROTECTION))?
+ "(transient-key)" : "" );
+ if (!keyparms)
+ err = gpg_error_from_syserror ();
+ else
+ {
+ err = common_gen (keyparms, algo, "ne",
+ pub_root, timestamp, expireval, is_subkey,
+ keygen_flags, passphrase,
+ cache_nonce_addr, passwd_nonce_addr);
+ xfree (keyparms);
+ }
+
+ return err;
+}
+
+
+/****************
+ * check valid days:
+ * return 0 on error or the multiplier
+ */
+static int
+check_valid_days( const char *s )
+{
+ if( !digitp(s) )
+ return 0;
+ for( s++; *s; s++)
+ if( !digitp(s) )
+ break;
+ if( !*s )
+ return 1;
+ if( s[1] )
+ return 0; /* e.g. "2323wc" */
+ if( *s == 'd' || *s == 'D' )
+ return 1;
+ if( *s == 'w' || *s == 'W' )
+ return 7;
+ if( *s == 'm' || *s == 'M' )
+ return 30;
+ if( *s == 'y' || *s == 'Y' )
+ return 365;
+ return 0;
+}
+
+
+static void
+print_key_flags(int flags)
+{
+ if(flags&PUBKEY_USAGE_SIG)
+ tty_printf("%s ",_("Sign"));
+
+ if(flags&PUBKEY_USAGE_CERT)
+ tty_printf("%s ",_("Certify"));
+
+ if(flags&PUBKEY_USAGE_ENC)
+ tty_printf("%s ",_("Encrypt"));
+
+ if(flags&PUBKEY_USAGE_AUTH)
+ tty_printf("%s ",_("Authenticate"));
+}
+
+
+/* Ask for the key flags and return them. CURRENT gives the current
+ * usage which should normally be given as 0. MASK gives the allowed
+ * flags. */
+unsigned int
+ask_key_flags_with_mask (int algo, int subkey, unsigned int current,
+ unsigned int mask)
+{
+ /* TRANSLATORS: Please use only plain ASCII characters for the
+ * translation. If this is not possible use single digits. The
+ * string needs to 8 bytes long. Here is a description of the
+ * functions:
+ *
+ * s = Toggle signing capability
+ * e = Toggle encryption capability
+ * a = Toggle authentication capability
+ * q = Finish
+ */
+ const char *togglers = _("SsEeAaQq");
+ char *answer = NULL;
+ const char *s;
+ unsigned int possible;
+
+ if ( strlen(togglers) != 8 )
+ {
+ tty_printf ("NOTE: Bad translation at %s:%d. "
+ "Please report.\n", __FILE__, __LINE__);
+ togglers = "11223300";
+ }
+
+ /* Mask the possible usage flags. This is for example used for a
+ * card based key. */
+ possible = (openpgp_pk_algo_usage (algo) & mask);
+
+ /* However, only primary keys may certify. */
+ if (subkey)
+ possible &= ~PUBKEY_USAGE_CERT;
+
+ /* Preload the current set with the possible set, without
+ * authentication if CURRENT is 0. If CURRENT is non-zero we mask
+ * with all possible usages. */
+ if (current)
+ current &= possible;
+ else
+ current = (possible&~PUBKEY_USAGE_AUTH);
+
+ for (;;)
+ {
+ tty_printf("\n");
+ tty_printf(_("Possible actions for a %s key: "),
+ (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA)
+ ? "ECDSA/EdDSA" : openpgp_pk_algo_name (algo));
+ print_key_flags(possible);
+ tty_printf("\n");
+ tty_printf(_("Current allowed actions: "));
+ print_key_flags(current);
+ tty_printf("\n\n");
+
+ if(possible&PUBKEY_USAGE_SIG)
+ tty_printf(_(" (%c) Toggle the sign capability\n"),
+ togglers[0]);
+ if(possible&PUBKEY_USAGE_ENC)
+ tty_printf(_(" (%c) Toggle the encrypt capability\n"),
+ togglers[2]);
+ if(possible&PUBKEY_USAGE_AUTH)
+ tty_printf(_(" (%c) Toggle the authenticate capability\n"),
+ togglers[4]);
+
+ tty_printf(_(" (%c) Finished\n"),togglers[6]);
+ tty_printf("\n");
+
+ xfree(answer);
+ answer = cpr_get("keygen.flags",_("Your selection? "));
+ cpr_kill_prompt();
+
+ if (*answer == '=')
+ {
+ /* Hack to allow direct entry of the capabilities. */
+ current = 0;
+ for (s=answer+1; *s; s++)
+ {
+ if ((*s == 's' || *s == 'S') && (possible&PUBKEY_USAGE_SIG))
+ current |= PUBKEY_USAGE_SIG;
+ else if ((*s == 'e' || *s == 'E') && (possible&PUBKEY_USAGE_ENC))
+ current |= PUBKEY_USAGE_ENC;
+ else if ((*s == 'a' || *s == 'A') && (possible&PUBKEY_USAGE_AUTH))
+ current |= PUBKEY_USAGE_AUTH;
+ else if (!subkey && *s == 'c')
+ {
+ /* Accept 'c' for the primary key because USAGE_CERT
+ will be set anyway. This is for folks who
+ want to experiment with a cert-only primary key. */
+ current |= PUBKEY_USAGE_CERT;
+ }
+ }
+ break;
+ }
+ else if (strlen(answer)>1)
+ tty_printf(_("Invalid selection.\n"));
+ else if(*answer=='\0' || *answer==togglers[6] || *answer==togglers[7])
+ break;
+ else if((*answer==togglers[0] || *answer==togglers[1])
+ && possible&PUBKEY_USAGE_SIG)
+ {
+ if(current&PUBKEY_USAGE_SIG)
+ current&=~PUBKEY_USAGE_SIG;
+ else
+ current|=PUBKEY_USAGE_SIG;
+ }
+ else if((*answer==togglers[2] || *answer==togglers[3])
+ && possible&PUBKEY_USAGE_ENC)
+ {
+ if(current&PUBKEY_USAGE_ENC)
+ current&=~PUBKEY_USAGE_ENC;
+ else
+ current|=PUBKEY_USAGE_ENC;
+ }
+ else if((*answer==togglers[4] || *answer==togglers[5])
+ && possible&PUBKEY_USAGE_AUTH)
+ {
+ if(current&PUBKEY_USAGE_AUTH)
+ current&=~PUBKEY_USAGE_AUTH;
+ else
+ current|=PUBKEY_USAGE_AUTH;
+ }
+ else
+ tty_printf(_("Invalid selection.\n"));
+ }
+
+ xfree(answer);
+
+ return current;
+}
+
+
+unsigned int
+ask_key_flags (int algo, int subkey, unsigned int current)
+{
+ return ask_key_flags_with_mask (algo, subkey, current, ~0);
+}
+
+
+/* Check whether we have a key for the key with HEXGRIP. Returns 0 if
+ there is no such key or the OpenPGP algo number for the key. */
+static int
+check_keygrip (ctrl_t ctrl, const char *hexgrip)
+{
+ gpg_error_t err;
+ unsigned char *public;
+ size_t publiclen;
+ int algo;
+
+ if (hexgrip[0] == '&')
+ hexgrip++;
+
+ err = agent_readkey (ctrl, 0, hexgrip, &public);
+ if (err)
+ return 0;
+ publiclen = gcry_sexp_canon_len (public, 0, NULL, NULL);
+
+ algo = get_pk_algo_from_canon_sexp (public, publiclen);
+ xfree (public);
+
+ return map_pk_gcry_to_openpgp (algo);
+}
+
+
+
+/* Ask for an algorithm. The function returns the algorithm id to
+ * create. If ADDMODE is false the function won't show an option to
+ * create the primary and subkey combined and won't set R_USAGE
+ * either. If a combined algorithm has been selected, the subkey
+ * algorithm is stored at R_SUBKEY_ALGO. If R_KEYGRIP is given, the
+ * user has the choice to enter the keygrip of an existing key. That
+ * keygrip is then stored at this address. The caller needs to free
+ * it. */
+static int
+ask_algo (ctrl_t ctrl, int addmode, int *r_subkey_algo, unsigned int *r_usage,
+ char **r_keygrip)
+{
+ gpg_error_t err;
+ char *keygrip = NULL;
+ char *answer = NULL;
+ int algo;
+ int dummy_algo;
+ char *p;
+
+ if (!r_subkey_algo)
+ r_subkey_algo = &dummy_algo;
+
+ tty_printf (_("Please select what kind of key you want:\n"));
+
+#if GPG_USE_RSA
+ if (!addmode)
+ tty_printf (_(" (%d) RSA and RSA (default)\n"), 1 );
+#endif
+
+ if (!addmode && opt.compliance != CO_DE_VS)
+ tty_printf (_(" (%d) DSA and Elgamal\n"), 2 );
+
+ if (opt.compliance != CO_DE_VS)
+ tty_printf (_(" (%d) DSA (sign only)\n"), 3 );
+#if GPG_USE_RSA
+ tty_printf (_(" (%d) RSA (sign only)\n"), 4 );
+#endif
+
+ if (addmode)
+ {
+ if (opt.compliance != CO_DE_VS)
+ tty_printf (_(" (%d) Elgamal (encrypt only)\n"), 5 );
+#if GPG_USE_RSA
+ tty_printf (_(" (%d) RSA (encrypt only)\n"), 6 );
+#endif
+ }
+ if (opt.expert)
+ {
+ if (opt.compliance != CO_DE_VS)
+ tty_printf (_(" (%d) DSA (set your own capabilities)\n"), 7 );
+#if GPG_USE_RSA
+ tty_printf (_(" (%d) RSA (set your own capabilities)\n"), 8 );
+#endif
+ }
+
+#if GPG_USE_ECDSA || GPG_USE_ECDH || GPG_USE_EDDSA
+ if (opt.expert && !addmode)
+ tty_printf (_(" (%d) ECC and ECC\n"), 9 );
+ if (opt.expert)
+ tty_printf (_(" (%d) ECC (sign only)\n"), 10 );
+ if (opt.expert)
+ tty_printf (_(" (%d) ECC (set your own capabilities)\n"), 11 );
+ if (opt.expert && addmode)
+ tty_printf (_(" (%d) ECC (encrypt only)\n"), 12 );
+#endif
+
+ if (opt.expert && r_keygrip)
+ tty_printf (_(" (%d) Existing key\n"), 13 );
+ if (r_keygrip)
+ tty_printf (_(" (%d) Existing key from card\n"), 14 );
+
+ for (;;)
+ {
+ *r_usage = 0;
+ *r_subkey_algo = 0;
+ xfree (answer);
+ answer = cpr_get ("keygen.algo", _("Your selection? "));
+ cpr_kill_prompt ();
+ algo = *answer? atoi (answer) : 1;
+
+ if (opt.compliance == CO_DE_VS
+ && (algo == 2 || algo == 3 || algo == 5 || algo == 7))
+ {
+ tty_printf (_("Invalid selection.\n"));
+ }
+ else if ((algo == 1 || !strcmp (answer, "rsa+rsa")) && !addmode)
+ {
+ algo = PUBKEY_ALGO_RSA;
+ *r_subkey_algo = PUBKEY_ALGO_RSA;
+ break;
+ }
+ else if ((algo == 2 || !strcmp (answer, "dsa+elg")) && !addmode)
+ {
+ algo = PUBKEY_ALGO_DSA;
+ *r_subkey_algo = PUBKEY_ALGO_ELGAMAL_E;
+ break;
+ }
+ else if (algo == 3 || !strcmp (answer, "dsa"))
+ {
+ algo = PUBKEY_ALGO_DSA;
+ *r_usage = PUBKEY_USAGE_SIG;
+ break;
+ }
+ else if (algo == 4 || !strcmp (answer, "rsa/s"))
+ {
+ algo = PUBKEY_ALGO_RSA;
+ *r_usage = PUBKEY_USAGE_SIG;
+ break;
+ }
+ else if ((algo == 5 || !strcmp (answer, "elg")) && addmode)
+ {
+ algo = PUBKEY_ALGO_ELGAMAL_E;
+ *r_usage = PUBKEY_USAGE_ENC;
+ break;
+ }
+ else if ((algo == 6 || !strcmp (answer, "rsa/e")) && addmode)
+ {
+ algo = PUBKEY_ALGO_RSA;
+ *r_usage = PUBKEY_USAGE_ENC;
+ break;
+ }
+ else if ((algo == 7 || !strcmp (answer, "dsa/*")) && opt.expert)
+ {
+ algo = PUBKEY_ALGO_DSA;
+ *r_usage = ask_key_flags (algo, addmode, 0);
+ break;
+ }
+ else if ((algo == 8 || !strcmp (answer, "rsa/*")) && opt.expert)
+ {
+ algo = PUBKEY_ALGO_RSA;
+ *r_usage = ask_key_flags (algo, addmode, 0);
+ break;
+ }
+ else if ((algo == 9 || !strcmp (answer, "ecc+ecc"))
+ && opt.expert && !addmode)
+ {
+ algo = PUBKEY_ALGO_ECDSA;
+ *r_subkey_algo = PUBKEY_ALGO_ECDH;
+ break;
+ }
+ else if ((algo == 10 || !strcmp (answer, "ecc/s")) && opt.expert)
+ {
+ algo = PUBKEY_ALGO_ECDSA;
+ *r_usage = PUBKEY_USAGE_SIG;
+ break;
+ }
+ else if ((algo == 11 || !strcmp (answer, "ecc/*")) && opt.expert)
+ {
+ algo = PUBKEY_ALGO_ECDSA;
+ *r_usage = ask_key_flags (algo, addmode, 0);
+ break;
+ }
+ else if ((algo == 12 || !strcmp (answer, "ecc/e"))
+ && opt.expert && addmode)
+ {
+ algo = PUBKEY_ALGO_ECDH;
+ *r_usage = PUBKEY_USAGE_ENC;
+ break;
+ }
+ else if ((algo == 13 || !strcmp (answer, "keygrip"))
+ && opt.expert && r_keygrip)
+ {
+ for (;;)
+ {
+ xfree (answer);
+ answer = cpr_get ("keygen.keygrip", _("Enter the keygrip: "));
+ cpr_kill_prompt ();
+ trim_spaces (answer);
+ if (!*answer)
+ {
+ xfree (answer);
+ answer = NULL;
+ continue;
+ }
+
+ if (strlen (answer) != 40 &&
+ !(answer[0] == '&' && strlen (answer+1) == 40))
+ tty_printf
+ (_("Not a valid keygrip (expecting 40 hex digits)\n"));
+ else if (!(algo = check_keygrip (ctrl, answer)) )
+ tty_printf (_("No key with this keygrip\n"));
+ else
+ break; /* Okay. */
+ }
+ xfree (keygrip);
+ keygrip = answer;
+ answer = NULL;
+ *r_usage = ask_key_flags (algo, addmode, 0);
+ break;
+ }
+ else if ((algo == 14 || !strcmp (answer, "cardkey")) && r_keygrip)
+ {
+ char *serialno;
+ strlist_t keypairlist, sl;
+ int count, selection;
+
+ err = agent_scd_serialno (&serialno, NULL);
+ if (err)
+ {
+ tty_printf (_("error reading the card: %s\n"),
+ gpg_strerror (err));
+ goto ask_again;
+ }
+ tty_printf (_("Serial number of the card: %s\n"), serialno);
+ xfree (serialno);
+
+ err = agent_scd_keypairinfo (ctrl, &keypairlist);
+ if (err)
+ {
+ tty_printf (_("error reading the card: %s\n"),
+ gpg_strerror (err));
+ goto ask_again;
+ }
+
+ do
+ {
+ tty_printf (_("Available keys:\n"));
+ for (count=1,sl=keypairlist; sl; sl = sl->next, count++)
+ {
+ gcry_sexp_t s_pkey;
+ char *algostr = NULL;
+ enum gcry_pk_algos algoid = 0;
+ const char *keyref;
+ int any = 0;
+
+ keyref = strchr (sl->d, ' ');
+ if (keyref)
+ {
+ keyref++;
+ if (!agent_scd_readkey (keyref, &s_pkey))
+ {
+ algostr = pubkey_algo_string (s_pkey, &algoid);
+ gcry_sexp_release (s_pkey);
+ }
+ }
+ /* We use the flags also encode the algo for use
+ * below. We need to tweak the algo in case
+ * GCRY_PK_ECC is returned becuase pubkey_algo_string
+ * is not aware of the OpenPGP algo mapping.
+ * FIXME: This is an ugly hack. */
+ sl->flags &= 0xff;
+ if (algoid == GCRY_PK_ECC
+ && algostr && !strncmp (algostr, "nistp", 5)
+ && !(sl->flags & GCRY_PK_USAGE_ENCR))
+ sl->flags |= (PUBKEY_ALGO_ECDSA << 8);
+ else if (algoid == GCRY_PK_ECC
+ && algostr && !strncmp (algostr, "brainpool", 9)
+ && !(sl->flags & GCRY_PK_USAGE_ENCR))
+ sl->flags |= (PUBKEY_ALGO_ECDSA << 8);
+ else if (algoid == GCRY_PK_ECC
+ && algostr && !strcmp (algostr, "ed25519")
+ && !(sl->flags & GCRY_PK_USAGE_ENCR))
+ sl->flags = (PUBKEY_ALGO_EDDSA << 8);
+ else
+ sl->flags |= (map_pk_gcry_to_openpgp (algoid) << 8);
+
+ tty_printf (" (%d) %s %s", count, sl->d, algostr);
+ if ((sl->flags & GCRY_PK_USAGE_CERT))
+ {
+ tty_printf ("%scert", any?",":" (");
+ any = 1;
+ }
+ if ((sl->flags & GCRY_PK_USAGE_SIGN))
+ {
+ tty_printf ("%ssign", any?",":" (");
+ any = 1;
+ }
+ if ((sl->flags & GCRY_PK_USAGE_AUTH))
+ {
+ tty_printf ("%sauth", any?",":" (");
+ any = 1;
+ }
+ if ((sl->flags & GCRY_PK_USAGE_ENCR))
+ {
+ tty_printf ("%sencr", any?",":" (");
+ any = 1;
+ }
+ tty_printf ("%s\n", any?")":"");
+ xfree (algostr);
+ }
+
+ xfree (answer);
+ answer = cpr_get ("keygen.cardkey", _("Your selection? "));
+ cpr_kill_prompt ();
+ trim_spaces (answer);
+ selection = atoi (answer);
+ }
+ while (!(selection > 0 && selection < count));
+
+ for (count=1,sl=keypairlist; sl; sl = sl->next, count++)
+ if (count == selection)
+ break;
+ if (!sl)
+ {
+ /* Just in case COUNT is zero (no keys). */
+ free_strlist (keypairlist);
+ goto ask_again;
+ }
+
+ xfree (keygrip);
+ keygrip = xstrdup (sl->d);
+ if ((p = strchr (keygrip, ' ')))
+ *p = 0;
+ algo = (sl->flags >>8);
+ if (opt.expert)
+ *r_usage = ask_key_flags_with_mask (algo, addmode,
+ (sl->flags & 0xff),
+ (sl->flags & 0xff));
+ else
+ {
+ *r_usage = (sl->flags & 0xff);
+ if (addmode)
+ *r_usage &= ~GCRY_PK_USAGE_CERT;
+ }
+ free_strlist (keypairlist);
+ break;
+ }
+ else
+ tty_printf (_("Invalid selection.\n"));
+
+ ask_again:
+ ;
+ }
+
+ xfree(answer);
+ if (r_keygrip)
+ *r_keygrip = keygrip;
+ return algo;
+}
+
+
+static unsigned int
+get_keysize_range (int algo, unsigned int *min, unsigned int *max)
+{
+ unsigned int def;
+ unsigned int dummy1, dummy2;
+
+ if (!min)
+ min = &dummy1;
+ if (!max)
+ max = &dummy2;
+
+ switch(algo)
+ {
+ case PUBKEY_ALGO_DSA:
+ *min = opt.expert? 768 : 1024;
+ *max=3072;
+ def=2048;
+ break;
+
+ case PUBKEY_ALGO_ECDSA:
+ case PUBKEY_ALGO_ECDH:
+ *min=256;
+ *max=521;
+ def=256;
+ break;
+
+ case PUBKEY_ALGO_EDDSA:
+ *min=255;
+ *max=441;
+ def=255;
+ break;
+
+ default:
+ *min = opt.compliance == CO_DE_VS ? 2048: 1024;
+ *max = 4096;
+ def = 3072;
+ break;
+ }
+
+ return def;
+}
+
+
+/* Return a fixed up keysize depending on ALGO. */
+static unsigned int
+fixup_keysize (unsigned int nbits, int algo, int silent)
+{
+ if (algo == PUBKEY_ALGO_DSA && (nbits % 64))
+ {
+ nbits = ((nbits + 63) / 64) * 64;
+ if (!silent)
+ tty_printf (_("rounded up to %u bits\n"), nbits);
+ }
+ else if (algo == PUBKEY_ALGO_EDDSA)
+ {
+ if (nbits != 255 && nbits != 441)
+ {
+ if (nbits < 256)
+ nbits = 255;
+ else
+ nbits = 441;
+ if (!silent)
+ tty_printf (_("rounded to %u bits\n"), nbits);
+ }
+ }
+ else if (algo == PUBKEY_ALGO_ECDH || algo == PUBKEY_ALGO_ECDSA)
+ {
+ if (nbits != 256 && nbits != 384 && nbits != 521)
+ {
+ if (nbits < 256)
+ nbits = 256;
+ else if (nbits < 384)
+ nbits = 384;
+ else
+ nbits = 521;
+ if (!silent)
+ tty_printf (_("rounded to %u bits\n"), nbits);
+ }
+ }
+ else if ((nbits % 32))
+ {
+ nbits = ((nbits + 31) / 32) * 32;
+ if (!silent)
+ tty_printf (_("rounded up to %u bits\n"), nbits );
+ }
+
+ return nbits;
+}
+
+
+/* Ask for the key size. ALGO is the algorithm. If PRIMARY_KEYSIZE
+ is not 0, the function asks for the size of the encryption
+ subkey. */
+static unsigned
+ask_keysize (int algo, unsigned int primary_keysize)
+{
+ unsigned int nbits;
+ unsigned int min, def, max;
+ int for_subkey = !!primary_keysize;
+ int autocomp = 0;
+
+ def = get_keysize_range (algo, &min, &max);
+
+ if (primary_keysize && !opt.expert)
+ {
+ /* Deduce the subkey size from the primary key size. */
+ if (algo == PUBKEY_ALGO_DSA && primary_keysize > 3072)
+ nbits = 3072; /* For performance reasons we don't support more
+ than 3072 bit DSA. However we won't see this
+ case anyway because DSA can't be used as an
+ encryption subkey ;-). */
+ else
+ nbits = primary_keysize;
+ autocomp = 1;
+ goto leave;
+ }
+
+ tty_printf(_("%s keys may be between %u and %u bits long.\n"),
+ openpgp_pk_algo_name (algo), min, max);
+
+ for (;;)
+ {
+ char *prompt, *answer;
+
+ if (for_subkey)
+ prompt = xasprintf (_("What keysize do you want "
+ "for the subkey? (%u) "), def);
+ else
+ prompt = xasprintf (_("What keysize do you want? (%u) "), def);
+ answer = cpr_get ("keygen.size", prompt);
+ cpr_kill_prompt ();
+ nbits = *answer? atoi (answer): def;
+ xfree(prompt);
+ xfree(answer);
+
+ if(nbits<min || nbits>max)
+ tty_printf(_("%s keysizes must be in the range %u-%u\n"),
+ openpgp_pk_algo_name (algo), min, max);
+ else
+ break;
+ }
+
+ tty_printf (_("Requested keysize is %u bits\n"), nbits);
+
+ leave:
+ nbits = fixup_keysize (nbits, algo, autocomp);
+ return nbits;
+}
+
+
+/* Ask for the curve. ALGO is the selected algorithm which this
+ function may adjust. Returns a const string of the name of the
+ curve. */
+const char *
+ask_curve (int *algo, int *subkey_algo, const char *current)
+{
+ /* NB: We always use a complete algo list so that we have stable
+ numbers in the menu regardless on how Gpg was configured. */
+ struct {
+ const char *name;
+ const char* eddsa_curve; /* Corresponding EdDSA curve. */
+ const char *pretty_name;
+ unsigned int supported : 1; /* Supported by gpg. */
+ unsigned int de_vs : 1; /* Allowed in CO_DE_VS. */
+ unsigned int expert_only : 1; /* Only with --expert */
+ unsigned int available : 1; /* Available in Libycrypt (runtime checked) */
+ } curves[] = {
+#if GPG_USE_ECDSA || GPG_USE_ECDH
+# define MY_USE_ECDSADH 1
+#else
+# define MY_USE_ECDSADH 0
+#endif
+ { "Curve25519", "Ed25519", "Curve 25519", !!GPG_USE_EDDSA, 0, 0, 0 },
+ { "Curve448", "Ed448", "Curve 448", 0/*reserved*/ , 0, 1, 0 },
+ { "NIST P-256", NULL, NULL, MY_USE_ECDSADH, 0, 1, 0 },
+ { "NIST P-384", NULL, NULL, MY_USE_ECDSADH, 0, 0, 0 },
+ { "NIST P-521", NULL, NULL, MY_USE_ECDSADH, 0, 1, 0 },
+ { "brainpoolP256r1", NULL, "Brainpool P-256", MY_USE_ECDSADH, 1, 1, 0 },
+ { "brainpoolP384r1", NULL, "Brainpool P-384", MY_USE_ECDSADH, 1, 1, 0 },
+ { "brainpoolP512r1", NULL, "Brainpool P-512", MY_USE_ECDSADH, 1, 1, 0 },
+ { "secp256k1", NULL, NULL, MY_USE_ECDSADH, 0, 1, 0 },
+ };
+#undef MY_USE_ECDSADH
+ int idx;
+ char *answer;
+ const char *result = NULL;
+ gcry_sexp_t keyparms;
+
+ tty_printf (_("Please select which elliptic curve you want:\n"));
+
+ keyparms = NULL;
+ for (idx=0; idx < DIM(curves); idx++)
+ {
+ int rc;
+
+ curves[idx].available = 0;
+ if (!curves[idx].supported)
+ continue;
+
+ if (opt.compliance==CO_DE_VS)
+ {
+ if (!curves[idx].de_vs)
+ continue; /* Not allowed. */
+ }
+ else if (!opt.expert && curves[idx].expert_only)
+ continue;
+
+ /* We need to switch from the ECDH name of the curve to the
+ EDDSA name of the curve if we want a signing key. */
+ gcry_sexp_release (keyparms);
+ rc = gcry_sexp_build (&keyparms, NULL,
+ "(public-key(ecc(curve %s)))",
+ curves[idx].eddsa_curve? curves[idx].eddsa_curve
+ /**/ : curves[idx].name);
+ if (rc)
+ continue;
+ if (!gcry_pk_get_curve (keyparms, 0, NULL))
+ continue;
+ if (subkey_algo && curves[idx].eddsa_curve)
+ {
+ /* Both Curve 25519 (or 448) keys are to be created. Check that
+ Libgcrypt also supports the real Curve25519 (or 448). */
+ gcry_sexp_release (keyparms);
+ rc = gcry_sexp_build (&keyparms, NULL,
+ "(public-key(ecc(curve %s)))",
+ curves[idx].name);
+ if (rc)
+ continue;
+ if (!gcry_pk_get_curve (keyparms, 0, NULL))
+ continue;
+ }
+
+ curves[idx].available = 1;
+ tty_printf (" (%d) %s\n", idx + 1,
+ curves[idx].pretty_name?
+ curves[idx].pretty_name:curves[idx].name);
+ }
+ gcry_sexp_release (keyparms);
+
+
+ for (;;)
+ {
+ answer = cpr_get ("keygen.curve", _("Your selection? "));
+ cpr_kill_prompt ();
+ idx = *answer? atoi (answer) : 1;
+ if (!*answer && current)
+ {
+ xfree(answer);
+ return NULL;
+ }
+ else if (*answer && !idx)
+ {
+ /* See whether the user entered the name of the curve. */
+ for (idx=0; idx < DIM(curves); idx++)
+ {
+ if (!opt.expert && curves[idx].expert_only)
+ continue;
+ if (!stricmp (curves[idx].name, answer)
+ || (curves[idx].pretty_name
+ && !stricmp (curves[idx].pretty_name, answer)))
+ break;
+ }
+ if (idx == DIM(curves))
+ idx = -1;
+ }
+ else
+ idx--;
+ xfree(answer);
+ answer = NULL;
+ if (idx < 0 || idx >= DIM (curves) || !curves[idx].available)
+ tty_printf (_("Invalid selection.\n"));
+ else
+ {
+ /* If the user selected a signing algorithm and Curve25519
+ we need to set the algo to EdDSA and update the curve name.
+ If switching away from EdDSA, we need to set the algo back
+ to ECDSA. */
+ if (*algo == PUBKEY_ALGO_ECDSA || *algo == PUBKEY_ALGO_EDDSA)
+ {
+ if (curves[idx].eddsa_curve)
+ {
+ if (subkey_algo && *subkey_algo == PUBKEY_ALGO_ECDSA)
+ *subkey_algo = PUBKEY_ALGO_EDDSA;
+ *algo = PUBKEY_ALGO_EDDSA;
+ result = curves[idx].eddsa_curve;
+ }
+ else
+ {
+ if (subkey_algo && *subkey_algo == PUBKEY_ALGO_EDDSA)
+ *subkey_algo = PUBKEY_ALGO_ECDSA;
+ *algo = PUBKEY_ALGO_ECDSA;
+ result = curves[idx].name;
+ }
+ }
+ else
+ result = curves[idx].name;
+ break;
+ }
+ }
+
+ if (!result)
+ result = curves[0].name;
+
+ return result;
+}
+
+
+/****************
+ * Parse an expire string and return its value in seconds.
+ * Returns (u32)-1 on error.
+ * This isn't perfect since scan_isodatestr returns unix time, and
+ * OpenPGP actually allows a 32-bit time *plus* a 32-bit offset.
+ * Because of this, we only permit setting expirations up to 2106, but
+ * OpenPGP could theoretically allow up to 2242. I think we'll all
+ * just cope for the next few years until we get a 64-bit time_t or
+ * similar.
+ */
+u32
+parse_expire_string( const char *string )
+{
+ int mult;
+ u32 seconds;
+ u32 abs_date = 0;
+ u32 curtime = make_timestamp ();
+ time_t tt;
+
+ if (!string || !*string || !strcmp (string, "none")
+ || !strcmp (string, "never") || !strcmp (string, "-"))
+ seconds = 0;
+ else if (!strncmp (string, "seconds=", 8))
+ seconds = atoi (string+8);
+ else if ((abs_date = scan_isodatestr(string))
+ && (abs_date+86400/2) > curtime)
+ seconds = (abs_date+86400/2) - curtime;
+ else if ((tt = isotime2epoch (string)) != (time_t)(-1))
+ seconds = (u32)tt - curtime;
+ else if ((mult = check_valid_days (string)))
+ seconds = atoi (string) * 86400L * mult;
+ else
+ seconds = (u32)(-1);
+
+ return seconds;
+}
+
+/* Parse a Creation-Date string which is either "1986-04-26" or
+ "19860426T042640". Returns 0 on error. */
+static u32
+parse_creation_string (const char *string)
+{
+ u32 seconds;
+
+ if (!*string)
+ seconds = 0;
+ else if ( !strncmp (string, "seconds=", 8) )
+ seconds = atoi (string+8);
+ else if ( !(seconds = scan_isodatestr (string)))
+ {
+ time_t tmp = isotime2epoch (string);
+ seconds = (tmp == (time_t)(-1))? 0 : tmp;
+ }
+ return seconds;
+}
+
+
+/* object == 0 for a key, and 1 for a sig */
+u32
+ask_expire_interval(int object,const char *def_expire)
+{
+ u32 interval;
+ char *answer;
+
+ switch(object)
+ {
+ case 0:
+ if(def_expire)
+ BUG();
+ tty_printf(_("Please specify how long the key should be valid.\n"
+ " 0 = key does not expire\n"
+ " <n> = key expires in n days\n"
+ " <n>w = key expires in n weeks\n"
+ " <n>m = key expires in n months\n"
+ " <n>y = key expires in n years\n"));
+ break;
+
+ case 1:
+ if(!def_expire)
+ BUG();
+ tty_printf(_("Please specify how long the signature should be valid.\n"
+ " 0 = signature does not expire\n"
+ " <n> = signature expires in n days\n"
+ " <n>w = signature expires in n weeks\n"
+ " <n>m = signature expires in n months\n"
+ " <n>y = signature expires in n years\n"));
+ break;
+
+ default:
+ BUG();
+ }
+
+ /* Note: The elgamal subkey for DSA has no expiration date because
+ * it must be signed with the DSA key and this one has the expiration
+ * date */
+
+ answer = NULL;
+ for(;;)
+ {
+ u32 curtime;
+
+ xfree(answer);
+ if(object==0)
+ answer = cpr_get("keygen.valid",_("Key is valid for? (0) "));
+ else
+ {
+ char *prompt;
+
+ prompt = xasprintf (_("Signature is valid for? (%s) "), def_expire);
+ answer = cpr_get("siggen.valid",prompt);
+ xfree(prompt);
+
+ if(*answer=='\0')
+ answer=xstrdup(def_expire);
+ }
+ cpr_kill_prompt();
+ trim_spaces(answer);
+ curtime = make_timestamp ();
+ interval = parse_expire_string( answer );
+ if( interval == (u32)-1 )
+ {
+ tty_printf(_("invalid value\n"));
+ continue;
+ }
+
+ if( !interval )
+ {
+ tty_printf((object==0)
+ ? _("Key does not expire at all\n")
+ : _("Signature does not expire at all\n"));
+ }
+ else
+ {
+ tty_printf(object==0
+ ? _("Key expires at %s\n")
+ : _("Signature expires at %s\n"),
+ asctimestamp((ulong)(curtime + interval) ) );
+#if SIZEOF_TIME_T <= 4 && !defined (HAVE_UNSIGNED_TIME_T)
+ if ( (time_t)((ulong)(curtime+interval)) < 0 )
+ tty_printf (_("Your system can't display dates beyond 2038.\n"
+ "However, it will be correctly handled up to"
+ " 2106.\n"));
+ else
+#endif /*SIZEOF_TIME_T*/
+ if ( (time_t)((unsigned long)(curtime+interval)) < curtime )
+ {
+ tty_printf (_("invalid value\n"));
+ continue;
+ }
+ }
+
+ if( cpr_enabled() || cpr_get_answer_is_yes("keygen.valid.okay",
+ _("Is this correct? (y/N) ")) )
+ break;
+ }
+
+ xfree(answer);
+ return interval;
+}
+
+u32
+ask_expiredate()
+{
+ u32 x = ask_expire_interval(0,NULL);
+ return x? make_timestamp() + x : 0;
+}
+
+
+
+static PKT_user_id *
+uid_from_string (const char *string)
+{
+ size_t n;
+ PKT_user_id *uid;
+
+ n = strlen (string);
+ uid = xmalloc_clear (sizeof *uid + n);
+ uid->len = n;
+ strcpy (uid->name, string);
+ uid->ref = 1;
+ return uid;
+}
+
+
+/* Return true if the user id UID already exists in the keyblock. */
+static int
+uid_already_in_keyblock (kbnode_t keyblock, const char *uid)
+{
+ PKT_user_id *uidpkt = uid_from_string (uid);
+ kbnode_t node;
+ int result = 0;
+
+ for (node=keyblock; node && !result; node=node->next)
+ if (!is_deleted_kbnode (node)
+ && node->pkt->pkttype == PKT_USER_ID
+ && !cmp_user_ids (uidpkt, node->pkt->pkt.user_id))
+ result = 1;
+ free_user_id (uidpkt);
+ return result;
+}
+
+
+/* Ask for a user ID. With a MODE of 1 an extra help prompt is
+ printed for use during a new key creation. If KEYBLOCK is not NULL
+ the function prevents the creation of an already existing user
+ ID. IF FULL is not set some prompts are not shown. */
+static char *
+ask_user_id (int mode, int full, KBNODE keyblock)
+{
+ char *answer;
+ char *aname, *acomment, *amail, *uid;
+
+ if ( !mode )
+ {
+ /* TRANSLATORS: This is the new string telling the user what
+ gpg is now going to do (i.e. ask for the parts of the user
+ ID). Note that if you do not translate this string, a
+ different string will be used, which might still have
+ a correct translation. */
+ const char *s1 =
+ N_("\n"
+ "GnuPG needs to construct a user ID to identify your key.\n"
+ "\n");
+ const char *s2 = _(s1);
+
+ if (!strcmp (s1, s2))
+ {
+ /* There is no translation for the string thus we to use
+ the old info text. gettext has no way to tell whether
+ a translation is actually available, thus we need to
+ to compare again. */
+ /* TRANSLATORS: This string is in general not anymore used
+ but you should keep your existing translation. In case
+ the new string is not translated this old string will
+ be used. */
+ const char *s3 = N_("\n"
+"You need a user ID to identify your key; "
+ "the software constructs the user ID\n"
+"from the Real Name, Comment and Email Address in this form:\n"
+" \"Heinrich Heine (Der Dichter) <heinrichh@duesseldorf.de>\"\n\n");
+ const char *s4 = _(s3);
+ if (strcmp (s3, s4))
+ s2 = s3; /* A translation exists - use it. */
+ }
+ tty_printf ("%s", s2) ;
+ }
+ uid = aname = acomment = amail = NULL;
+ for(;;) {
+ char *p;
+ int fail=0;
+
+ if( !aname ) {
+ for(;;) {
+ xfree(aname);
+ aname = cpr_get("keygen.name",_("Real name: "));
+ trim_spaces(aname);
+ cpr_kill_prompt();
+
+ if( opt.allow_freeform_uid )
+ break;
+
+ if( strpbrk( aname, "<>" ) )
+ {
+ tty_printf(_("Invalid character in name\n"));
+ tty_printf(_("The characters '%s' and '%s' may not "
+ "appear in name\n"), "<", ">");
+ }
+ else if( digitp(aname) )
+ tty_printf(_("Name may not start with a digit\n"));
+ else if (*aname && strlen (aname) < 5)
+ {
+ tty_printf(_("Name must be at least 5 characters long\n"));
+ /* However, we allow an empty name. */
+ }
+ else
+ break;
+ }
+ }
+ if( !amail ) {
+ for(;;) {
+ xfree(amail);
+ amail = cpr_get("keygen.email",_("Email address: "));
+ trim_spaces(amail);
+ cpr_kill_prompt();
+ if( !*amail || opt.allow_freeform_uid )
+ break; /* no email address is okay */
+ else if ( !is_valid_mailbox (amail) )
+ tty_printf(_("Not a valid email address\n"));
+ else
+ break;
+ }
+ }
+ if (!acomment) {
+ if (full) {
+ for(;;) {
+ xfree(acomment);
+ acomment = cpr_get("keygen.comment",_("Comment: "));
+ trim_spaces(acomment);
+ cpr_kill_prompt();
+ if( !*acomment )
+ break; /* no comment is okay */
+ else if( strpbrk( acomment, "()" ) )
+ tty_printf(_("Invalid character in comment\n"));
+ else
+ break;
+ }
+ }
+ else {
+ xfree (acomment);
+ acomment = xstrdup ("");
+ }
+ }
+
+
+ xfree(uid);
+ uid = p = xmalloc(strlen(aname)+strlen(amail)+strlen(acomment)+12+10);
+ if (!*aname && *amail && !*acomment && !random_is_faked ())
+ { /* Empty name and comment but with mail address. Use
+ simplified form with only the non-angle-bracketed mail
+ address. */
+ p = stpcpy (p, amail);
+ }
+ else
+ {
+ p = stpcpy (p, aname );
+ if (*acomment)
+ p = stpcpy(stpcpy(stpcpy(p," ("), acomment),")");
+ if (*amail)
+ p = stpcpy(stpcpy(stpcpy(p," <"), amail),">");
+ }
+
+ /* Append a warning if the RNG is switched into fake mode. */
+ if ( random_is_faked () )
+ strcpy(p, " (insecure!)" );
+
+ /* print a note in case that UTF8 mapping has to be done */
+ for(p=uid; *p; p++ ) {
+ if( *p & 0x80 ) {
+ tty_printf(_("You are using the '%s' character set.\n"),
+ get_native_charset() );
+ break;
+ }
+ }
+
+ tty_printf(_("You selected this USER-ID:\n \"%s\"\n\n"), uid);
+
+ if( !*amail && !opt.allow_freeform_uid
+ && (strchr( aname, '@' ) || strchr( acomment, '@'))) {
+ fail = 1;
+ tty_printf(_("Please don't put the email address "
+ "into the real name or the comment\n") );
+ }
+
+ if (!fail && keyblock)
+ {
+ if (uid_already_in_keyblock (keyblock, uid))
+ {
+ tty_printf (_("Such a user ID already exists on this key!\n"));
+ fail = 1;
+ }
+ }
+
+ for(;;) {
+ /* TRANSLATORS: These are the allowed answers in
+ lower and uppercase. Below you will find the matching
+ string which should be translated accordingly and the
+ letter changed to match the one in the answer string.
+
+ n = Change name
+ c = Change comment
+ e = Change email
+ o = Okay (ready, continue)
+ q = Quit
+ */
+ const char *ansstr = _("NnCcEeOoQq");
+
+ if( strlen(ansstr) != 10 )
+ BUG();
+ if( cpr_enabled() ) {
+ answer = xstrdup (ansstr + (fail?8:6));
+ answer[1] = 0;
+ }
+ else if (full) {
+ answer = cpr_get("keygen.userid.cmd", fail?
+ _("Change (N)ame, (C)omment, (E)mail or (Q)uit? ") :
+ _("Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? "));
+ cpr_kill_prompt();
+ }
+ else {
+ answer = cpr_get("keygen.userid.cmd", fail?
+ _("Change (N)ame, (E)mail, or (Q)uit? ") :
+ _("Change (N)ame, (E)mail, or (O)kay/(Q)uit? "));
+ cpr_kill_prompt();
+ }
+ if( strlen(answer) > 1 )
+ ;
+ else if( *answer == ansstr[0] || *answer == ansstr[1] ) {
+ xfree(aname); aname = NULL;
+ break;
+ }
+ else if( *answer == ansstr[2] || *answer == ansstr[3] ) {
+ xfree(acomment); acomment = NULL;
+ break;
+ }
+ else if( *answer == ansstr[4] || *answer == ansstr[5] ) {
+ xfree(amail); amail = NULL;
+ break;
+ }
+ else if( *answer == ansstr[6] || *answer == ansstr[7] ) {
+ if( fail ) {
+ tty_printf(_("Please correct the error first\n"));
+ }
+ else {
+ xfree(aname); aname = NULL;
+ xfree(acomment); acomment = NULL;
+ xfree(amail); amail = NULL;
+ break;
+ }
+ }
+ else if( *answer == ansstr[8] || *answer == ansstr[9] ) {
+ xfree(aname); aname = NULL;
+ xfree(acomment); acomment = NULL;
+ xfree(amail); amail = NULL;
+ xfree(uid); uid = NULL;
+ break;
+ }
+ xfree(answer);
+ }
+ xfree(answer);
+ if (!amail && !acomment)
+ break;
+ xfree(uid); uid = NULL;
+ }
+ if( uid ) {
+ char *p = native_to_utf8( uid );
+ xfree( uid );
+ uid = p;
+ }
+ return uid;
+}
+
+
+/* Basic key generation. Here we divert to the actual generation
+ routines based on the requested algorithm. */
+static int
+do_create (int algo, unsigned int nbits, const char *curve, KBNODE pub_root,
+ u32 timestamp, u32 expiredate, int is_subkey,
+ int keygen_flags, const char *passphrase,
+ char **cache_nonce_addr, char **passwd_nonce_addr)
+{
+ gpg_error_t err;
+
+ /* Fixme: The entropy collecting message should be moved to a
+ libgcrypt progress handler. */
+ if (!opt.batch)
+ tty_printf (_(
+"We need to generate a lot of random bytes. It is a good idea to perform\n"
+"some other action (type on the keyboard, move the mouse, utilize the\n"
+"disks) during the prime generation; this gives the random number\n"
+"generator a better chance to gain enough entropy.\n") );
+
+ if (algo == PUBKEY_ALGO_ELGAMAL_E)
+ err = gen_elg (algo, nbits, pub_root, timestamp, expiredate, is_subkey,
+ keygen_flags, passphrase,
+ cache_nonce_addr, passwd_nonce_addr);
+ else if (algo == PUBKEY_ALGO_DSA)
+ err = gen_dsa (nbits, pub_root, timestamp, expiredate, is_subkey,
+ keygen_flags, passphrase,
+ cache_nonce_addr, passwd_nonce_addr);
+ else if (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_ECDH)
+ err = gen_ecc (algo, curve, pub_root, timestamp, expiredate, is_subkey,
+ keygen_flags, passphrase,
+ cache_nonce_addr, passwd_nonce_addr);
+ else if (algo == PUBKEY_ALGO_RSA)
+ err = gen_rsa (algo, nbits, pub_root, timestamp, expiredate, is_subkey,
+ keygen_flags, passphrase,
+ cache_nonce_addr, passwd_nonce_addr);
+ else
+ BUG();
+
+ return err;
+}
+
+
+/* Generate a new user id packet or return NULL if canceled. If
+ KEYBLOCK is not NULL the function prevents the creation of an
+ already existing user ID. If UIDSTR is not NULL the user is not
+ asked but UIDSTR is used to create the user id packet; if the user
+ id already exists NULL is returned. UIDSTR is expected to be utf-8
+ encoded and should have already been checked for a valid length
+ etc. */
+PKT_user_id *
+generate_user_id (KBNODE keyblock, const char *uidstr)
+{
+ PKT_user_id *uid;
+ char *p;
+
+ if (uidstr)
+ {
+ if (uid_already_in_keyblock (keyblock, uidstr))
+ return NULL; /* Already exists. */
+ uid = uid_from_string (uidstr);
+ }
+ else
+ {
+ p = ask_user_id (1, 1, keyblock);
+ if (!p)
+ return NULL; /* Canceled. */
+ uid = uid_from_string (p);
+ xfree (p);
+ }
+ return uid;
+}
+
+
+/* Helper for parse_key_parameter_string for one part of the
+ * specification string; i.e. ALGO/FLAGS. If STRING is NULL or empty
+ * success is returned. On error an error code is returned. Note
+ * that STRING may be modified by this function. NULL may be passed
+ * for any parameter. FOR_SUBKEY shall be true if this is used as a
+ * subkey. If CLEAR_CERT is set a default CERT usage will be cleared;
+ * this is useful if for example the default algorithm is used for a
+ * subkey. */
+static gpg_error_t
+parse_key_parameter_part (ctrl_t ctrl,
+ char *string, int for_subkey, int clear_cert,
+ int *r_algo, unsigned int *r_size,
+ unsigned int *r_keyuse,
+ char const **r_curve,
+ char **r_keygrip)
+{
+ gpg_error_t err;
+ char *flags;
+ int algo;
+ char *endp;
+ const char *curve = NULL;
+ int ecdh_or_ecdsa = 0;
+ unsigned int size;
+ int keyuse;
+ int i;
+ const char *s;
+ int from_card = 0;
+ char *keygrip = NULL;
+
+ if (!string || !*string)
+ return 0; /* Success. */
+
+ flags = strchr (string, '/');
+ if (flags)
+ *flags++ = 0;
+
+ algo = 0;
+ if (!ascii_strcasecmp (string, "card"))
+ from_card = 1;
+ else if (strlen (string) >= 3 && (digitp (string+3) || !string[3]))
+ {
+ if (!ascii_memcasecmp (string, "rsa", 3))
+ algo = PUBKEY_ALGO_RSA;
+ else if (!ascii_memcasecmp (string, "dsa", 3))
+ algo = PUBKEY_ALGO_DSA;
+ else if (!ascii_memcasecmp (string, "elg", 3))
+ algo = PUBKEY_ALGO_ELGAMAL_E;
+ }
+
+ if (from_card)
+ ; /* We need the flags before we can figure out the key to use. */
+ else if (algo)
+ {
+ if (!string[3])
+ size = get_keysize_range (algo, NULL, NULL);
+ else
+ {
+ size = strtoul (string+3, &endp, 10);
+ if (size < 512 || size > 16384 || *endp)
+ return gpg_error (GPG_ERR_INV_VALUE);
+ }
+ }
+ else if ((curve = openpgp_is_curve_supported (string, &algo, &size)))
+ {
+ if (!algo)
+ {
+ algo = PUBKEY_ALGO_ECDH; /* Default ECC algorithm. */
+ ecdh_or_ecdsa = 1; /* We may need to switch the algo. */
+ }
+ }
+ else
+ return gpg_error (GPG_ERR_UNKNOWN_CURVE);
+
+ /* Parse the flags. */
+ keyuse = 0;
+ if (flags)
+ {
+ char **tokens = NULL;
+
+ tokens = strtokenize (flags, ",");
+ if (!tokens)
+ return gpg_error_from_syserror ();
+
+ for (i=0; (s = tokens[i]); i++)
+ {
+ if (!*s)
+ ;
+ else if (!ascii_strcasecmp (s, "sign"))
+ keyuse |= PUBKEY_USAGE_SIG;
+ else if (!ascii_strcasecmp (s, "encrypt")
+ || !ascii_strcasecmp (s, "encr"))
+ keyuse |= PUBKEY_USAGE_ENC;
+ else if (!ascii_strcasecmp (s, "auth"))
+ keyuse |= PUBKEY_USAGE_AUTH;
+ else if (!ascii_strcasecmp (s, "cert"))
+ keyuse |= PUBKEY_USAGE_CERT;
+ else if (!ascii_strcasecmp (s, "ecdsa") && !from_card)
+ {
+ if (algo == PUBKEY_ALGO_ECDH || algo == PUBKEY_ALGO_ECDSA)
+ algo = PUBKEY_ALGO_ECDSA;
+ else
+ {
+ xfree (tokens);
+ return gpg_error (GPG_ERR_INV_FLAG);
+ }
+ ecdh_or_ecdsa = 0;
+ }
+ else if (!ascii_strcasecmp (s, "ecdh") && !from_card)
+ {
+ if (algo == PUBKEY_ALGO_ECDH || algo == PUBKEY_ALGO_ECDSA)
+ algo = PUBKEY_ALGO_ECDH;
+ else
+ {
+ xfree (tokens);
+ return gpg_error (GPG_ERR_INV_FLAG);
+ }
+ ecdh_or_ecdsa = 0;
+ }
+ else if (!ascii_strcasecmp (s, "eddsa") && !from_card)
+ {
+ /* Not required but we allow it for consistency. */
+ if (algo == PUBKEY_ALGO_EDDSA)
+ ;
+ else
+ {
+ xfree (tokens);
+ return gpg_error (GPG_ERR_INV_FLAG);
+ }
+ }
+ else
+ {
+ xfree (tokens);
+ return gpg_error (GPG_ERR_UNKNOWN_FLAG);
+ }
+ }
+
+ xfree (tokens);
+ }
+
+ /* If not yet decided switch between ecdh and ecdsa unless we want
+ * to read the algo from the current card. */
+ if (from_card)
+ {
+ strlist_t keypairlist, sl;
+ char *reqkeyref;
+
+ if (!keyuse)
+ keyuse = (for_subkey? PUBKEY_USAGE_ENC
+ /* */ : (PUBKEY_USAGE_CERT|PUBKEY_USAGE_SIG));
+
+ /* Access the card to make sure we have one and to show the S/N. */
+ {
+ char *serialno;
+
+ err = agent_scd_serialno (&serialno, NULL);
+ if (err)
+ {
+ log_error (_("error reading the card: %s\n"), gpg_strerror (err));
+ return err;
+ }
+ if (!opt.quiet)
+ log_info (_("Serial number of the card: %s\n"), serialno);
+ xfree (serialno);
+ }
+
+ err = agent_scd_keypairinfo (ctrl, &keypairlist);
+ if (err)
+ {
+ log_error (_("error reading the card: %s\n"), gpg_strerror (err));
+ return err;
+ }
+ agent_scd_getattr_one ((keyuse & (PUBKEY_USAGE_SIG|PUBKEY_USAGE_CERT))
+ ? "$SIGNKEYID":"$ENCRKEYID", &reqkeyref);
+
+ algo = 0; /* Should already be the case. */
+ for (sl=keypairlist; sl && !algo; sl = sl->next)
+ {
+ gcry_sexp_t s_pkey;
+ char *algostr = NULL;
+ enum gcry_pk_algos algoid = 0;
+ const char *keyref;
+
+ if (!reqkeyref)
+ continue; /* Card does not provide the info (skip all). */
+
+ keyref = strchr (sl->d, ' ');
+ if (!keyref)
+ continue; /* Ooops. */
+ keyref++;
+ if (strcmp (reqkeyref, keyref))
+ continue; /* This is not the requested keyref. */
+
+ if ((keyuse & (PUBKEY_USAGE_SIG|PUBKEY_USAGE_CERT))
+ && (sl->flags & (GCRY_PK_USAGE_SIGN|GCRY_PK_USAGE_CERT)))
+ ; /* Okay */
+ else if ((keyuse & PUBKEY_USAGE_ENC)
+ && (sl->flags & GCRY_PK_USAGE_ENCR))
+ ; /* Okay */
+ else
+ continue; /* Not usable for us. */
+
+ if (agent_scd_readkey (keyref, &s_pkey))
+ continue; /* Could not read the key. */
+
+ algostr = pubkey_algo_string (s_pkey, &algoid);
+ gcry_sexp_release (s_pkey);
+
+
+ /* Map to OpenPGP algo number.
+ * We need to tweak the algo in case GCRY_PK_ECC is returned
+ * because pubkey_algo_string is not aware of the OpenPGP
+ * algo mapping. FIXME: This is an ugly hack. */
+ if (algoid == GCRY_PK_ECC
+ && algostr && !strncmp (algostr, "nistp", 5)
+ && !(sl->flags & GCRY_PK_USAGE_ENCR))
+ algo = PUBKEY_ALGO_ECDSA;
+ else if (algoid == GCRY_PK_ECC
+ && algostr && !strcmp (algostr, "ed25519")
+ && !(sl->flags & GCRY_PK_USAGE_ENCR))
+ algo = PUBKEY_ALGO_EDDSA;
+ else
+ algo = map_pk_gcry_to_openpgp (algoid);
+
+ xfree (algostr);
+ xfree (keygrip);
+ keygrip = xtrystrdup (sl->d);
+ if (!keygrip)
+ {
+ err = gpg_error_from_syserror ();
+ xfree (reqkeyref);
+ free_strlist (keypairlist);
+ return err;
+ }
+ if ((endp = strchr (keygrip, ' ')))
+ *endp = 0;
+ }
+
+ xfree (reqkeyref);
+ free_strlist (keypairlist);
+ if (!algo || !keygrip)
+ {
+ err = gpg_error (GPG_ERR_PUBKEY_ALGO);
+ log_error ("no usable key on the card: %s\n", gpg_strerror (err));
+ xfree (keygrip);
+ return err;
+ }
+ }
+ else if (ecdh_or_ecdsa && keyuse)
+ algo = (keyuse & PUBKEY_USAGE_ENC)? PUBKEY_ALGO_ECDH : PUBKEY_ALGO_ECDSA;
+ else if (ecdh_or_ecdsa)
+ algo = for_subkey? PUBKEY_ALGO_ECDH : PUBKEY_ALGO_ECDSA;
+
+ /* Set or fix key usage. */
+ if (!keyuse)
+ {
+ if (algo == PUBKEY_ALGO_ECDSA || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_DSA)
+ keyuse = PUBKEY_USAGE_SIG;
+ else if (algo == PUBKEY_ALGO_RSA)
+ keyuse = for_subkey? PUBKEY_USAGE_ENC : PUBKEY_USAGE_SIG;
+ else
+ keyuse = PUBKEY_USAGE_ENC;
+ }
+ else if (algo == PUBKEY_ALGO_ECDSA || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_DSA)
+ {
+ keyuse &= ~PUBKEY_USAGE_ENC; /* Forbid encryption. */
+ }
+ else if (algo == PUBKEY_ALGO_ECDH || algo == PUBKEY_ALGO_ELGAMAL_E)
+ {
+ keyuse = PUBKEY_USAGE_ENC; /* Allow only encryption. */
+ }
+
+ /* Make sure a primary key can certify. */
+ if (!for_subkey)
+ keyuse |= PUBKEY_USAGE_CERT;
+
+ /* But if requested remove th cert usage. */
+ if (clear_cert)
+ keyuse &= ~PUBKEY_USAGE_CERT;
+
+ /* Check that usage is actually possible. */
+ if (/**/((keyuse & (PUBKEY_USAGE_SIG|PUBKEY_USAGE_AUTH|PUBKEY_USAGE_CERT))
+ && !pubkey_get_nsig (algo))
+ || ((keyuse & PUBKEY_USAGE_ENC)
+ && !pubkey_get_nenc (algo))
+ || (for_subkey && (keyuse & PUBKEY_USAGE_CERT)))
+ {
+ xfree (keygrip);
+ return gpg_error (GPG_ERR_WRONG_KEY_USAGE);
+ }
+
+ /* Return values. */
+ if (r_algo)
+ *r_algo = algo;
+ if (r_size)
+ {
+ unsigned int min, def, max;
+
+ /* Make sure the keysize is in the allowed range. */
+ def = get_keysize_range (algo, &min, &max);
+ if (!size)
+ size = def;
+ else if (size < min)
+ size = min;
+ else if (size > max)
+ size = max;
+
+ *r_size = fixup_keysize (size, algo, 1);
+ }
+
+ if (r_keyuse)
+ *r_keyuse = keyuse;
+ if (r_curve)
+ *r_curve = curve;
+
+ if (r_keygrip)
+ *r_keygrip = keygrip;
+ else
+ xfree (keygrip);
+
+ return 0;
+}
+
+/* Parse and return the standard key generation parameter.
+ * The string is expected to be in this format:
+ *
+ * ALGO[/FLAGS][+SUBALGO[/FLAGS]]
+ *
+ * Here ALGO is a string in the same format as printed by the
+ * keylisting. For example:
+ *
+ * rsa3072 := RSA with 3072 bit.
+ * dsa2048 := DSA with 2048 bit.
+ * elg2048 := Elgamal with 2048 bit.
+ * ed25519 := EDDSA using curve Ed25519.
+ * cv25519 := ECDH using curve Curve25519.
+ * nistp256:= ECDSA or ECDH using curve NIST P-256
+ *
+ * All strings with an unknown prefix are considered an elliptic
+ * curve. Curves which have no implicit algorithm require that FLAGS
+ * is given to select whether ECDSA or ECDH is used; this can either
+ * be done using an algorithm keyword or usage keywords.
+ *
+ * FLAGS is a comma delimited string of keywords:
+ *
+ * cert := Allow usage Certify
+ * sign := Allow usage Sign
+ * encr := Allow usage Encrypt
+ * auth := Allow usage Authentication
+ * encrypt := Alias for "encr"
+ * ecdsa := Use algorithm ECDSA.
+ * eddsa := Use algorithm EdDSA.
+ * ecdh := Use algorithm ECDH.
+ *
+ * There are several defaults and fallbacks depending on the
+ * algorithm. PART can be used to select which part of STRING is
+ * used:
+ * -1 := Both parts
+ * 0 := Only the part of the primary key
+ * 1 := If there is one part parse that one, if there are
+ * two parts parse the part which best matches the
+ * SUGGESTED_USE or in case that can't be evaluated the second part.
+ * Always return using the args for the primary key (R_ALGO,....).
+ *
+ */
+gpg_error_t
+parse_key_parameter_string (ctrl_t ctrl,
+ const char *string, int part,
+ unsigned int suggested_use,
+ int *r_algo, unsigned int *r_size,
+ unsigned int *r_keyuse,
+ char const **r_curve,
+ char **r_keygrip,
+ int *r_subalgo, unsigned int *r_subsize,
+ unsigned int *r_subkeyuse,
+ char const **r_subcurve,
+ char **r_subkeygrip)
+{
+ gpg_error_t err = 0;
+ char *primary, *secondary;
+
+ if (r_algo)
+ *r_algo = 0;
+ if (r_size)
+ *r_size = 0;
+ if (r_keyuse)
+ *r_keyuse = 0;
+ if (r_curve)
+ *r_curve = NULL;
+ if (r_keygrip)
+ *r_keygrip = NULL;
+ if (r_subalgo)
+ *r_subalgo = 0;
+ if (r_subsize)
+ *r_subsize = 0;
+ if (r_subkeyuse)
+ *r_subkeyuse = 0;
+ if (r_subcurve)
+ *r_subcurve = NULL;
+ if (r_subkeygrip)
+ *r_subkeygrip = NULL;
+
+ if (!string || !*string
+ || !ascii_strcasecmp (string, "default") || !strcmp (string, "-"))
+ string = get_default_pubkey_algo ();
+ else if (!ascii_strcasecmp (string, "future-default")
+ || !ascii_strcasecmp (string, "futuredefault"))
+ string = FUTURE_STD_KEY_PARAM;
+ else if (!ascii_strcasecmp (string, "card"))
+ string = "card/cert,sign+card/encr";
+
+ primary = xstrdup (string);
+ secondary = strchr (primary, '+');
+ if (secondary)
+ *secondary++ = 0;
+ if (part == -1 || part == 0)
+ {
+ err = parse_key_parameter_part (ctrl, primary,
+ 0, 0, r_algo, r_size,
+ r_keyuse, r_curve, r_keygrip);
+ if (!err && part == -1)
+ err = parse_key_parameter_part (ctrl, secondary,
+ 1, 0, r_subalgo, r_subsize,
+ r_subkeyuse, r_subcurve,
+ r_subkeygrip);
+ }
+ else if (part == 1)
+ {
+ /* If we have SECONDARY, use that part. If there is only one
+ * part consider this to be the subkey algo. In case a
+ * SUGGESTED_USE has been given and the usage of the secondary
+ * part does not match SUGGESTED_USE try again using the primary
+ * part. Noet thar when falling back to the primary key we need
+ * to force clearing the cert usage. */
+ if (secondary)
+ {
+ err = parse_key_parameter_part (ctrl, secondary,
+ 1, 0,
+ r_algo, r_size, r_keyuse, r_curve,
+ r_keygrip);
+ if (!err && suggested_use && r_keyuse && !(suggested_use & *r_keyuse))
+ err = parse_key_parameter_part (ctrl, primary,
+ 1, 1 /*(clear cert)*/,
+ r_algo, r_size, r_keyuse, r_curve,
+ r_keygrip);
+ }
+ else
+ err = parse_key_parameter_part (ctrl, primary,
+ 1, 0,
+ r_algo, r_size, r_keyuse, r_curve,
+ r_keygrip);
+ }
+
+ xfree (primary);
+
+ return err;
+}
+
+
+
+/* Append R to the linked list PARA. */
+static void
+append_to_parameter (struct para_data_s *para, struct para_data_s *r)
+{
+ log_assert (para);
+ while (para->next)
+ para = para->next;
+ para->next = r;
+}
+
+/* Release the parameter list R. */
+static void
+release_parameter_list (struct para_data_s *r)
+{
+ struct para_data_s *r2;
+
+ for (; r ; r = r2)
+ {
+ r2 = r->next;
+ if (r->key == pPASSPHRASE && *r->u.value)
+ wipememory (r->u.value, strlen (r->u.value));
+ xfree (r);
+ }
+}
+
+static struct para_data_s *
+get_parameter( struct para_data_s *para, enum para_name key )
+{
+ struct para_data_s *r;
+
+ for( r = para; r && r->key != key; r = r->next )
+ ;
+ return r;
+}
+
+static const char *
+get_parameter_value( struct para_data_s *para, enum para_name key )
+{
+ struct para_data_s *r = get_parameter( para, key );
+ return (r && *r->u.value)? r->u.value : NULL;
+}
+
+
+/* This is similar to get_parameter_value but also returns the empty
+ string. This is required so that quick_generate_keypair can use an
+ empty Passphrase to specify no-protection. */
+static const char *
+get_parameter_passphrase (struct para_data_s *para)
+{
+ struct para_data_s *r = get_parameter (para, pPASSPHRASE);
+ return r ? r->u.value : NULL;
+}
+
+
+static int
+get_parameter_algo (ctrl_t ctrl, struct para_data_s *para, enum para_name key,
+ int *r_default)
+{
+ int i;
+ struct para_data_s *r = get_parameter( para, key );
+
+ if (r_default)
+ *r_default = 0;
+
+ if (!r)
+ return -1;
+
+ /* Note that we need to handle the ECC algorithms specified as
+ strings directly because Libgcrypt folds them all to ECC. */
+ if (!ascii_strcasecmp (r->u.value, "default"))
+ {
+ /* Note: If you change this default algo, remember to change it
+ * also in gpg.c:gpgconf_list. */
+ /* FIXME: We only allow the algo here and have a separate thing
+ * for the curve etc. That is a ugly but demanded for backward
+ * compatibility with the batch key generation. It would be
+ * better to make full use of parse_key_parameter_string. */
+ parse_key_parameter_string (ctrl, NULL, 0, 0,
+ &i, NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL, NULL, NULL);
+ if (r_default)
+ *r_default = 1;
+ }
+ else if (digitp (r->u.value))
+ i = atoi( r->u.value );
+ else if (!strcmp (r->u.value, "ELG-E")
+ || !strcmp (r->u.value, "ELG"))
+ i = PUBKEY_ALGO_ELGAMAL_E;
+ else if (!ascii_strcasecmp (r->u.value, "EdDSA"))
+ i = PUBKEY_ALGO_EDDSA;
+ else if (!ascii_strcasecmp (r->u.value, "ECDSA"))
+ i = PUBKEY_ALGO_ECDSA;
+ else if (!ascii_strcasecmp (r->u.value, "ECDH"))
+ i = PUBKEY_ALGO_ECDH;
+ else
+ i = map_pk_gcry_to_openpgp (gcry_pk_map_name (r->u.value));
+
+ if (i == PUBKEY_ALGO_RSA_E || i == PUBKEY_ALGO_RSA_S)
+ i = 0; /* we don't want to allow generation of these algorithms */
+ return i;
+}
+
+
+/* Parse a usage string. The usage keywords "auth", "sign", "encr"
+ * may be delimited by space, tab, or comma. On error -1 is returned
+ * instead of the usage flags. */
+static int
+parse_usagestr (const char *usagestr)
+{
+ gpg_error_t err;
+ char **tokens = NULL;
+ const char *s;
+ int i;
+ unsigned int use = 0;
+
+ tokens = strtokenize (usagestr, " \t,");
+ if (!tokens)
+ {
+ err = gpg_error_from_syserror ();
+ log_error ("strtokenize failed: %s\n", gpg_strerror (err));
+ return -1;
+ }
+
+ for (i=0; (s = tokens[i]); i++)
+ {
+ if (!*s)
+ ;
+ else if (!ascii_strcasecmp (s, "sign"))
+ use |= PUBKEY_USAGE_SIG;
+ else if (!ascii_strcasecmp (s, "encrypt")
+ || !ascii_strcasecmp (s, "encr"))
+ use |= PUBKEY_USAGE_ENC;
+ else if (!ascii_strcasecmp (s, "auth"))
+ use |= PUBKEY_USAGE_AUTH;
+ else if (!ascii_strcasecmp (s, "cert"))
+ use |= PUBKEY_USAGE_CERT;
+ else
+ {
+ xfree (tokens);
+ return -1; /* error */
+ }
+ }
+
+ xfree (tokens);
+ return use;
+}
+
+
+/*
+ * Parse the usage parameter and set the keyflags. Returns -1 on
+ * error, 0 for no usage given or 1 for usage available.
+ */
+static int
+parse_parameter_usage (const char *fname,
+ struct para_data_s *para, enum para_name key)
+{
+ struct para_data_s *r = get_parameter( para, key );
+ int i;
+
+ if (!r)
+ return 0; /* none (this is an optional parameter)*/
+
+ i = parse_usagestr (r->u.value);
+ if (i == -1)
+ {
+ log_error ("%s:%d: invalid usage list\n", fname, r->lnr );
+ return -1; /* error */
+ }
+
+ r->u.usage = i;
+ return 1;
+}
+
+
+static int
+parse_revocation_key (const char *fname,
+ struct para_data_s *para, enum para_name key)
+{
+ struct para_data_s *r = get_parameter( para, key );
+ struct revocation_key revkey;
+ char *pn;
+ int i;
+
+ if( !r )
+ return 0; /* none (this is an optional parameter) */
+
+ pn = r->u.value;
+
+ revkey.class=0x80;
+ revkey.algid=atoi(pn);
+ if(!revkey.algid)
+ goto fail;
+
+ /* Skip to the fpr */
+ while(*pn && *pn!=':')
+ pn++;
+
+ if(*pn!=':')
+ goto fail;
+
+ pn++;
+
+ for(i=0;i<MAX_FINGERPRINT_LEN && *pn;i++,pn+=2)
+ {
+ int c=hextobyte(pn);
+ if(c==-1)
+ goto fail;
+
+ revkey.fpr[i]=c;
+ }
+
+ /* skip to the tag */
+ while(*pn && *pn!='s' && *pn!='S')
+ pn++;
+
+ if(ascii_strcasecmp(pn,"sensitive")==0)
+ revkey.class|=0x40;
+
+ memcpy(&r->u.revkey,&revkey,sizeof(struct revocation_key));
+
+ return 0;
+
+ fail:
+ log_error("%s:%d: invalid revocation key\n", fname, r->lnr );
+ return -1; /* error */
+}
+
+
+static u32
+get_parameter_u32( struct para_data_s *para, enum para_name key )
+{
+ struct para_data_s *r = get_parameter( para, key );
+
+ if( !r )
+ return 0;
+ if( r->key == pKEYCREATIONDATE )
+ return r->u.creation;
+ if( r->key == pKEYEXPIRE || r->key == pSUBKEYEXPIRE )
+ return r->u.expire;
+ if( r->key == pKEYUSAGE || r->key == pSUBKEYUSAGE )
+ return r->u.usage;
+
+ return (unsigned int)strtoul( r->u.value, NULL, 10 );
+}
+
+static unsigned int
+get_parameter_uint( struct para_data_s *para, enum para_name key )
+{
+ return get_parameter_u32( para, key );
+}
+
+static struct revocation_key *
+get_parameter_revkey( struct para_data_s *para, enum para_name key )
+{
+ struct para_data_s *r = get_parameter( para, key );
+ return r? &r->u.revkey : NULL;
+}
+
+static int
+proc_parameter_file (ctrl_t ctrl, struct para_data_s *para, const char *fname,
+ struct output_control_s *outctrl, int card )
+{
+ struct para_data_s *r;
+ const char *s1, *s2, *s3;
+ size_t n;
+ char *p;
+ int is_default = 0;
+ int have_user_id = 0;
+ int err, algo;
+
+ /* Check that we have all required parameters. */
+ r = get_parameter( para, pKEYTYPE );
+ if(r)
+ {
+ algo = get_parameter_algo (ctrl, para, pKEYTYPE, &is_default);
+ if (openpgp_pk_test_algo2 (algo, PUBKEY_USAGE_SIG))
+ {
+ log_error ("%s:%d: invalid algorithm\n", fname, r->lnr );
+ return -1;
+ }
+ }
+ else
+ {
+ log_error ("%s: no Key-Type specified\n",fname);
+ return -1;
+ }
+
+ err = parse_parameter_usage (fname, para, pKEYUSAGE);
+ if (!err)
+ {
+ /* Default to algo capabilities if key-usage is not provided and
+ no default algorithm has been requested. */
+ r = xmalloc_clear(sizeof(*r));
+ r->key = pKEYUSAGE;
+ r->u.usage = (is_default
+ ? (PUBKEY_USAGE_CERT | PUBKEY_USAGE_SIG)
+ : openpgp_pk_algo_usage(algo));
+ append_to_parameter (para, r);
+ }
+ else if (err == -1)
+ return -1;
+ else
+ {
+ r = get_parameter (para, pKEYUSAGE);
+ if (r && (r->u.usage & ~openpgp_pk_algo_usage (algo)))
+ {
+ log_error ("%s:%d: specified Key-Usage not allowed for algo %d\n",
+ fname, r->lnr, algo);
+ return -1;
+ }
+ }
+
+ is_default = 0;
+ r = get_parameter( para, pSUBKEYTYPE );
+ if(r)
+ {
+ algo = get_parameter_algo (ctrl, para, pSUBKEYTYPE, &is_default);
+ if (openpgp_pk_test_algo (algo))
+ {
+ log_error ("%s:%d: invalid algorithm\n", fname, r->lnr );
+ return -1;
+ }
+
+ err = parse_parameter_usage (fname, para, pSUBKEYUSAGE);
+ if (!err)
+ {
+ /* Default to algo capabilities if subkey-usage is not
+ provided */
+ r = xmalloc_clear (sizeof(*r));
+ r->key = pSUBKEYUSAGE;
+ r->u.usage = (is_default
+ ? PUBKEY_USAGE_ENC
+ : openpgp_pk_algo_usage (algo));
+ append_to_parameter (para, r);
+ }
+ else if (err == -1)
+ return -1;
+ else
+ {
+ r = get_parameter (para, pSUBKEYUSAGE);
+ if (r && (r->u.usage & ~openpgp_pk_algo_usage (algo)))
+ {
+ log_error ("%s:%d: specified Subkey-Usage not allowed"
+ " for algo %d\n", fname, r->lnr, algo);
+ return -1;
+ }
+ }
+ }
+
+
+ if( get_parameter_value( para, pUSERID ) )
+ have_user_id=1;
+ else
+ {
+ /* create the formatted user ID */
+ s1 = get_parameter_value( para, pNAMEREAL );
+ s2 = get_parameter_value( para, pNAMECOMMENT );
+ s3 = get_parameter_value( para, pNAMEEMAIL );
+ if( s1 || s2 || s3 )
+ {
+ n = (s1?strlen(s1):0) + (s2?strlen(s2):0) + (s3?strlen(s3):0);
+ r = xmalloc_clear( sizeof *r + n + 20 );
+ r->key = pUSERID;
+ p = r->u.value;
+ if( s1 )
+ p = stpcpy(p, s1 );
+ if( s2 )
+ p = stpcpy(stpcpy(stpcpy(p," ("), s2 ),")");
+ if( s3 )
+ {
+ /* If we have only the email part, do not add the space
+ * and the angle brackets. */
+ if (*r->u.value)
+ p = stpcpy(stpcpy(stpcpy(p," <"), s3 ),">");
+ else
+ p = stpcpy (p, s3);
+ }
+ append_to_parameter (para, r);
+ have_user_id=1;
+ }
+ }
+
+ if(!have_user_id)
+ {
+ log_error("%s: no User-ID specified\n",fname);
+ return -1;
+ }
+
+ /* Set preferences, if any. */
+ keygen_set_std_prefs(get_parameter_value( para, pPREFERENCES ), 0);
+
+ /* Set keyserver, if any. */
+ s1=get_parameter_value( para, pKEYSERVER );
+ if(s1)
+ {
+ struct keyserver_spec *spec;
+
+ spec = parse_keyserver_uri (s1, 1);
+ if(spec)
+ {
+ free_keyserver_spec(spec);
+ opt.def_keyserver_url=s1;
+ }
+ else
+ {
+ r = get_parameter (para, pKEYSERVER);
+ log_error("%s:%d: invalid keyserver url\n", fname, r->lnr );
+ return -1;
+ }
+ }
+
+ /* Set revoker, if any. */
+ if (parse_revocation_key (fname, para, pREVOKER))
+ return -1;
+
+
+ /* Make KEYCREATIONDATE from Creation-Date. */
+ r = get_parameter (para, pCREATIONDATE);
+ if (r && *r->u.value)
+ {
+ u32 seconds;
+
+ seconds = parse_creation_string (r->u.value);
+ if (!seconds)
+ {
+ log_error ("%s:%d: invalid creation date\n", fname, r->lnr );
+ return -1;
+ }
+ r->u.creation = seconds;
+ r->key = pKEYCREATIONDATE; /* Change that entry. */
+ }
+
+ /* Make KEYEXPIRE from Expire-Date. */
+ r = get_parameter( para, pEXPIREDATE );
+ if( r && *r->u.value )
+ {
+ u32 seconds;
+
+ seconds = parse_expire_string( r->u.value );
+ if( seconds == (u32)-1 )
+ {
+ log_error("%s:%d: invalid expire date\n", fname, r->lnr );
+ return -1;
+ }
+ r->u.expire = seconds;
+ r->key = pKEYEXPIRE; /* change hat entry */
+ /* also set it for the subkey */
+ r = xmalloc_clear( sizeof *r + 20 );
+ r->key = pSUBKEYEXPIRE;
+ r->u.expire = seconds;
+ append_to_parameter (para, r);
+ }
+
+ do_generate_keypair (ctrl, para, outctrl, card );
+ return 0;
+}
+
+
+/****************
+ * Kludge to allow non interactive key generation controlled
+ * by a parameter file.
+ * Note, that string parameters are expected to be in UTF-8
+ */
+static void
+read_parameter_file (ctrl_t ctrl, const char *fname )
+{
+ static struct { const char *name;
+ enum para_name key;
+ } keywords[] = {
+ { "Key-Type", pKEYTYPE},
+ { "Key-Length", pKEYLENGTH },
+ { "Key-Curve", pKEYCURVE },
+ { "Key-Usage", pKEYUSAGE },
+ { "Subkey-Type", pSUBKEYTYPE },
+ { "Subkey-Length", pSUBKEYLENGTH },
+ { "Subkey-Curve", pSUBKEYCURVE },
+ { "Subkey-Usage", pSUBKEYUSAGE },
+ { "Name-Real", pNAMEREAL },
+ { "Name-Email", pNAMEEMAIL },
+ { "Name-Comment", pNAMECOMMENT },
+ { "Expire-Date", pEXPIREDATE },
+ { "Creation-Date", pCREATIONDATE },
+ { "Passphrase", pPASSPHRASE },
+ { "Preferences", pPREFERENCES },
+ { "Revoker", pREVOKER },
+ { "Handle", pHANDLE },
+ { "Keyserver", pKEYSERVER },
+ { "Keygrip", pKEYGRIP },
+ { "Key-Grip", pKEYGRIP },
+ { "Subkey-grip", pSUBKEYGRIP },
+ { NULL, 0 }
+ };
+ IOBUF fp;
+ byte *line;
+ unsigned int maxlen, nline;
+ char *p;
+ int lnr;
+ const char *err = NULL;
+ struct para_data_s *para, *r;
+ int i;
+ struct output_control_s outctrl;
+
+ memset( &outctrl, 0, sizeof( outctrl ) );
+ outctrl.pub.afx = new_armor_context ();
+
+ if( !fname || !*fname)
+ fname = "-";
+
+ fp = iobuf_open (fname);
+ if (fp && is_secured_file (iobuf_get_fd (fp)))
+ {
+ iobuf_close (fp);
+ fp = NULL;
+ gpg_err_set_errno (EPERM);
+ }
+ if (!fp) {
+ log_error (_("can't open '%s': %s\n"), fname, strerror(errno) );
+ return;
+ }
+ iobuf_ioctl (fp, IOBUF_IOCTL_NO_CACHE, 1, NULL);
+
+ lnr = 0;
+ err = NULL;
+ para = NULL;
+ maxlen = 1024;
+ line = NULL;
+ nline = 0;
+ while ( iobuf_read_line (fp, &line, &nline, &maxlen) ) {
+ char *keyword, *value;
+
+ lnr++;
+ if( !maxlen ) {
+ err = "line too long";
+ break;
+ }
+ for( p = line; isspace(*(byte*)p); p++ )
+ ;
+ if( !*p || *p == '#' )
+ continue;
+ keyword = p;
+ if( *keyword == '%' ) {
+ for( ; !isspace(*(byte*)p); p++ )
+ ;
+ if( *p )
+ *p++ = 0;
+ for( ; isspace(*(byte*)p); p++ )
+ ;
+ value = p;
+ trim_trailing_ws( value, strlen(value) );
+ if( !ascii_strcasecmp( keyword, "%echo" ) )
+ log_info("%s\n", value );
+ else if( !ascii_strcasecmp( keyword, "%dry-run" ) )
+ outctrl.dryrun = 1;
+ else if( !ascii_strcasecmp( keyword, "%ask-passphrase" ) )
+ ; /* Dummy for backward compatibility. */
+ else if( !ascii_strcasecmp( keyword, "%no-ask-passphrase" ) )
+ ; /* Dummy for backward compatibility. */
+ else if( !ascii_strcasecmp( keyword, "%no-protection" ) )
+ outctrl.keygen_flags |= KEYGEN_FLAG_NO_PROTECTION;
+ else if( !ascii_strcasecmp( keyword, "%transient-key" ) )
+ outctrl.keygen_flags |= KEYGEN_FLAG_TRANSIENT_KEY;
+ else if( !ascii_strcasecmp( keyword, "%commit" ) ) {
+ outctrl.lnr = lnr;
+ if (proc_parameter_file (ctrl, para, fname, &outctrl, 0 ))
+ print_status_key_not_created
+ (get_parameter_value (para, pHANDLE));
+ release_parameter_list( para );
+ para = NULL;
+ }
+ else if( !ascii_strcasecmp( keyword, "%pubring" ) ) {
+ if( outctrl.pub.fname && !strcmp( outctrl.pub.fname, value ) )
+ ; /* still the same file - ignore it */
+ else {
+ xfree( outctrl.pub.newfname );
+ outctrl.pub.newfname = xstrdup( value );
+ outctrl.use_files = 1;
+ }
+ }
+ else if( !ascii_strcasecmp( keyword, "%secring" ) ) {
+ /* Ignore this command. */
+ }
+ else
+ log_info("skipping control '%s' (%s)\n", keyword, value );
+
+
+ continue;
+ }
+
+
+ if( !(p = strchr( p, ':' )) || p == keyword ) {
+ err = "missing colon";
+ break;
+ }
+ if( *p )
+ *p++ = 0;
+ for( ; isspace(*(byte*)p); p++ )
+ ;
+ if( !*p ) {
+ err = "missing argument";
+ break;
+ }
+ value = p;
+ trim_trailing_ws( value, strlen(value) );
+
+ for(i=0; keywords[i].name; i++ ) {
+ if( !ascii_strcasecmp( keywords[i].name, keyword ) )
+ break;
+ }
+ if( !keywords[i].name ) {
+ err = "unknown keyword";
+ break;
+ }
+ if( keywords[i].key != pKEYTYPE && !para ) {
+ err = "parameter block does not start with \"Key-Type\"";
+ break;
+ }
+
+ if( keywords[i].key == pKEYTYPE && para ) {
+ outctrl.lnr = lnr;
+ if (proc_parameter_file (ctrl, para, fname, &outctrl, 0 ))
+ print_status_key_not_created
+ (get_parameter_value (para, pHANDLE));
+ release_parameter_list( para );
+ para = NULL;
+ }
+ else {
+ for( r = para; r; r = r->next ) {
+ if( r->key == keywords[i].key )
+ break;
+ }
+ if( r ) {
+ err = "duplicate keyword";
+ break;
+ }
+ }
+ r = xmalloc_clear( sizeof *r + strlen( value ) );
+ r->lnr = lnr;
+ r->key = keywords[i].key;
+ strcpy( r->u.value, value );
+ r->next = para;
+ para = r;
+ }
+ if( err )
+ log_error("%s:%d: %s\n", fname, lnr, err );
+ else if( iobuf_error (fp) ) {
+ log_error("%s:%d: read error\n", fname, lnr);
+ }
+ else if( para ) {
+ outctrl.lnr = lnr;
+ if (proc_parameter_file (ctrl, para, fname, &outctrl, 0 ))
+ print_status_key_not_created (get_parameter_value (para, pHANDLE));
+ }
+
+ if( outctrl.use_files ) { /* close open streams */
+ iobuf_close( outctrl.pub.stream );
+
+ /* Must invalidate that ugly cache to actually close it. */
+ if (outctrl.pub.fname)
+ iobuf_ioctl (NULL, IOBUF_IOCTL_INVALIDATE_CACHE,
+ 0, (char*)outctrl.pub.fname);
+
+ xfree( outctrl.pub.fname );
+ xfree( outctrl.pub.newfname );
+ }
+
+ xfree (line);
+ release_parameter_list( para );
+ iobuf_close (fp);
+ release_armor_context (outctrl.pub.afx);
+}
+
+
+/* Helper for quick_generate_keypair. */
+static struct para_data_s *
+quickgen_set_para (struct para_data_s *para, int for_subkey,
+ int algo, int nbits, const char *curve, unsigned int use,
+ const char *keygrip)
+{
+ struct para_data_s *r;
+
+ r = xmalloc_clear (sizeof *r + 30);
+ r->key = for_subkey? pSUBKEYUSAGE : pKEYUSAGE;
+ if (use)
+ snprintf (r->u.value, 30, "%s%s%s%s",
+ (use & PUBKEY_USAGE_ENC)? "encr " : "",
+ (use & PUBKEY_USAGE_SIG)? "sign " : "",
+ (use & PUBKEY_USAGE_AUTH)? "auth " : "",
+ (use & PUBKEY_USAGE_CERT)? "cert " : "");
+ else
+ strcpy (r->u.value, for_subkey ? "encr" : "sign");
+ r->next = para;
+ para = r;
+ r = xmalloc_clear (sizeof *r + 20);
+ r->key = for_subkey? pSUBKEYTYPE : pKEYTYPE;
+ snprintf (r->u.value, 20, "%d", algo);
+ r->next = para;
+ para = r;
+
+ if (keygrip)
+ {
+ r = xmalloc_clear (sizeof *r + strlen (keygrip));
+ r->key = for_subkey? pSUBKEYGRIP : pKEYGRIP;
+ strcpy (r->u.value, keygrip);
+ r->next = para;
+ para = r;
+ }
+ else if (curve)
+ {
+ r = xmalloc_clear (sizeof *r + strlen (curve));
+ r->key = for_subkey? pSUBKEYCURVE : pKEYCURVE;
+ strcpy (r->u.value, curve);
+ r->next = para;
+ para = r;
+ }
+ else
+ {
+ r = xmalloc_clear (sizeof *r + 20);
+ r->key = for_subkey? pSUBKEYLENGTH : pKEYLENGTH;
+ sprintf (r->u.value, "%u", nbits);
+ r->next = para;
+ para = r;
+ }
+
+ return para;
+}
+
+
+/*
+ * Unattended generation of a standard key.
+ */
+void
+quick_generate_keypair (ctrl_t ctrl, const char *uid, const char *algostr,
+ const char *usagestr, const char *expirestr)
+{
+ gpg_error_t err;
+ struct para_data_s *para = NULL;
+ struct para_data_s *r;
+ struct output_control_s outctrl;
+ int use_tty;
+
+ memset (&outctrl, 0, sizeof outctrl);
+
+ use_tty = (!opt.batch && !opt.answer_yes
+ && !*algostr && !*usagestr && !*expirestr
+ && !cpr_enabled ()
+ && gnupg_isatty (fileno (stdin))
+ && gnupg_isatty (fileno (stdout))
+ && gnupg_isatty (fileno (stderr)));
+
+ r = xmalloc_clear (sizeof *r + strlen (uid));
+ r->key = pUSERID;
+ strcpy (r->u.value, uid);
+ r->next = para;
+ para = r;
+
+ uid = trim_spaces (r->u.value);
+ if (!*uid || (!opt.allow_freeform_uid && !is_valid_user_id (uid)))
+ {
+ log_error (_("Key generation failed: %s\n"),
+ gpg_strerror (GPG_ERR_INV_USER_ID));
+ goto leave;
+ }
+
+ /* If gpg is directly used on the console ask whether a key with the
+ given user id shall really be created. */
+ if (use_tty)
+ {
+ tty_printf (_("About to create a key for:\n \"%s\"\n\n"), uid);
+ if (!cpr_get_answer_is_yes_def ("quick_keygen.okay",
+ _("Continue? (Y/n) "), 1))
+ goto leave;
+ }
+
+ /* Check whether such a user ID already exists. */
+ {
+ KEYDB_HANDLE kdbhd;
+ KEYDB_SEARCH_DESC desc;
+
+ memset (&desc, 0, sizeof desc);
+ desc.mode = KEYDB_SEARCH_MODE_EXACT;
+ desc.u.name = uid;
+
+ kdbhd = keydb_new ();
+ if (!kdbhd)
+ goto leave;
+
+ err = keydb_search (kdbhd, &desc, 1, NULL);
+ keydb_release (kdbhd);
+ if (gpg_err_code (err) != GPG_ERR_NOT_FOUND)
+ {
+ log_info (_("A key for \"%s\" already exists\n"), uid);
+ if (opt.answer_yes)
+ ;
+ else if (!use_tty
+ || !cpr_get_answer_is_yes_def ("quick_keygen.force",
+ _("Create anyway? (y/N) "), 0))
+ {
+ write_status_error ("genkey", gpg_error (304));
+ log_inc_errorcount (); /* we used log_info */
+ goto leave;
+ }
+ log_info (_("creating anyway\n"));
+ }
+ }
+
+ if (!*expirestr || strcmp (expirestr, "-") == 0)
+ expirestr = default_expiration_interval;
+
+ if ((!*algostr || !ascii_strcasecmp (algostr, "default")
+ || !ascii_strcasecmp (algostr, "future-default")
+ || !ascii_strcasecmp (algostr, "futuredefault")
+ || !ascii_strcasecmp (algostr, "card"))
+ && (!*usagestr || !ascii_strcasecmp (usagestr, "default")
+ || !strcmp (usagestr, "-")))
+ {
+ /* Use default key parameters. */
+ int algo, subalgo;
+ unsigned int size, subsize;
+ unsigned int keyuse, subkeyuse;
+ const char *curve, *subcurve;
+ char *keygrip, *subkeygrip;
+
+ err = parse_key_parameter_string (ctrl, algostr, -1, 0,
+ &algo, &size, &keyuse, &curve,
+ &keygrip,
+ &subalgo, &subsize, &subkeyuse,
+ &subcurve, &subkeygrip);
+ if (err)
+ {
+ log_error (_("Key generation failed: %s\n"), gpg_strerror (err));
+ goto leave;
+ }
+
+ para = quickgen_set_para (para, 0, algo, size, curve, keyuse,
+ keygrip);
+ if (subalgo)
+ para = quickgen_set_para (para, 1,
+ subalgo, subsize, subcurve, subkeyuse,
+ subkeygrip);
+ if (*expirestr)
+ {
+ u32 expire;
+
+ expire = parse_expire_string (expirestr);
+ if (expire == (u32)-1 )
+ {
+ err = gpg_error (GPG_ERR_INV_VALUE);
+ log_error (_("Key generation failed: %s\n"), gpg_strerror (err));
+ goto leave;
+ }
+ r = xmalloc_clear (sizeof *r + 20);
+ r->key = pKEYEXPIRE;
+ r->u.expire = expire;
+ r->next = para;
+ para = r;
+ }
+
+ xfree (keygrip);
+ xfree (subkeygrip);
+ }
+ else
+ {
+ /* Extended unattended mode. Creates only the primary key. */
+ int algo;
+ unsigned int use;
+ u32 expire;
+ unsigned int nbits;
+ const char *curve;
+ char *keygrip;
+
+ err = parse_algo_usage_expire (ctrl, 0, algostr, usagestr, expirestr,
+ &algo, &use, &expire, &nbits, &curve,
+ &keygrip);
+ if (err)
+ {
+ log_error (_("Key generation failed: %s\n"), gpg_strerror (err) );
+ goto leave;
+ }
+
+ para = quickgen_set_para (para, 0, algo, nbits, curve, use,
+ keygrip);
+ r = xmalloc_clear (sizeof *r + 20);
+ r->key = pKEYEXPIRE;
+ r->u.expire = expire;
+ r->next = para;
+ para = r;
+
+ xfree (keygrip);
+ }
+
+ /* If the pinentry loopback mode is not and we have a static
+ passphrase (i.e. set with --passphrase{,-fd,-file} while in batch
+ mode), we use that passphrase for the new key. */
+ if (opt.pinentry_mode != PINENTRY_MODE_LOOPBACK
+ && have_static_passphrase ())
+ {
+ const char *s = get_static_passphrase ();
+
+ r = xmalloc_clear (sizeof *r + strlen (s));
+ r->key = pPASSPHRASE;
+ strcpy (r->u.value, s);
+ r->next = para;
+ para = r;
+ }
+
+ proc_parameter_file (ctrl, para, "[internal]", &outctrl, 0);
+
+ leave:
+ release_parameter_list (para);
+}
+
+
+/*
+ * Generate a keypair (fname is only used in batch mode) If
+ * CARD_SERIALNO is not NULL the function will create the keys on an
+ * OpenPGP Card. If CARD_BACKUP_KEY has been set and CARD_SERIALNO is
+ * NOT NULL, the encryption key for the card is generated on the host,
+ * imported to the card and a backup file created by gpg-agent. If
+ * FULL is not set only the basic prompts are used (except for batch
+ * mode).
+ */
+void
+generate_keypair (ctrl_t ctrl, int full, const char *fname,
+ const char *card_serialno, int card_backup_key)
+{
+ gpg_error_t err;
+ unsigned int nbits;
+ char *uid = NULL;
+ int algo;
+ unsigned int use;
+ int both = 0;
+ u32 expire;
+ struct para_data_s *para = NULL;
+ struct para_data_s *r;
+ struct output_control_s outctrl;
+
+#ifndef ENABLE_CARD_SUPPORT
+ (void)card_backup_key;
+#endif
+
+ memset( &outctrl, 0, sizeof( outctrl ) );
+
+ if (opt.batch && card_serialno)
+ {
+ /* We don't yet support unattended key generation with a card
+ * serial number. */
+ log_error (_("can't do this in batch mode\n"));
+ print_further_info ("key generation with card serial number");
+ return;
+ }
+
+ if (opt.batch)
+ {
+ read_parameter_file (ctrl, fname);
+ return;
+ }
+
+ if (card_serialno)
+ {
+#ifdef ENABLE_CARD_SUPPORT
+ struct agent_card_info_s info;
+
+ memset (&info, 0, sizeof (info));
+ err = agent_scd_getattr ("KEY-ATTR", &info);
+ if (err)
+ {
+ log_error (_("error getting current key info: %s\n"),
+ gpg_strerror (err));
+ return;
+ }
+
+ r = xcalloc (1, sizeof *r + strlen (card_serialno) );
+ r->key = pSERIALNO;
+ strcpy( r->u.value, card_serialno);
+ r->next = para;
+ para = r;
+
+ r = xcalloc (1, sizeof *r + 20 );
+ r->key = pKEYTYPE;
+ sprintf( r->u.value, "%d", info.key_attr[0].algo );
+ r->next = para;
+ para = r;
+ r = xcalloc (1, sizeof *r + 20 );
+ r->key = pKEYUSAGE;
+ strcpy (r->u.value, "sign");
+ r->next = para;
+ para = r;
+
+ r = xcalloc (1, sizeof *r + 20 );
+ r->key = pSUBKEYTYPE;
+ sprintf( r->u.value, "%d", info.key_attr[1].algo );
+ r->next = para;
+ para = r;
+ r = xcalloc (1, sizeof *r + 20 );
+ r->key = pSUBKEYUSAGE;
+ strcpy (r->u.value, "encrypt");
+ r->next = para;
+ para = r;
+ if (info.key_attr[1].algo == PUBKEY_ALGO_RSA)
+ {
+ r = xcalloc (1, sizeof *r + 20 );
+ r->key = pSUBKEYLENGTH;
+ sprintf( r->u.value, "%u", info.key_attr[1].nbits);
+ r->next = para;
+ para = r;
+ }
+ else if (info.key_attr[1].algo == PUBKEY_ALGO_ECDSA
+ || info.key_attr[1].algo == PUBKEY_ALGO_EDDSA
+ || info.key_attr[1].algo == PUBKEY_ALGO_ECDH)
+ {
+ r = xcalloc (1, sizeof *r + strlen (info.key_attr[1].curve));
+ r->key = pSUBKEYCURVE;
+ strcpy (r->u.value, info.key_attr[1].curve);
+ r->next = para;
+ para = r;
+ }
+
+ r = xcalloc (1, sizeof *r + 20 );
+ r->key = pAUTHKEYTYPE;
+ sprintf( r->u.value, "%d", info.key_attr[2].algo );
+ r->next = para;
+ para = r;
+
+ if (card_backup_key)
+ {
+ r = xcalloc (1, sizeof *r + 1);
+ r->key = pCARDBACKUPKEY;
+ strcpy (r->u.value, "1");
+ r->next = para;
+ para = r;
+ }
+#endif /*ENABLE_CARD_SUPPORT*/
+ }
+ else if (full) /* Full featured key generation. */
+ {
+ int subkey_algo;
+ char *key_from_hexgrip = NULL;
+
+ algo = ask_algo (ctrl, 0, &subkey_algo, &use, &key_from_hexgrip);
+ if (key_from_hexgrip)
+ {
+ r = xmalloc_clear( sizeof *r + 20 );
+ r->key = pKEYTYPE;
+ sprintf( r->u.value, "%d", algo);
+ r->next = para;
+ para = r;
+
+ if (use)
+ {
+ r = xmalloc_clear( sizeof *r + 25 );
+ r->key = pKEYUSAGE;
+ sprintf( r->u.value, "%s%s%s",
+ (use & PUBKEY_USAGE_SIG)? "sign ":"",
+ (use & PUBKEY_USAGE_ENC)? "encrypt ":"",
+ (use & PUBKEY_USAGE_AUTH)? "auth":"" );
+ r->next = para;
+ para = r;
+ }
+
+ r = xmalloc_clear( sizeof *r + 40 );
+ r->key = pKEYGRIP;
+ strcpy (r->u.value, key_from_hexgrip);
+ r->next = para;
+ para = r;
+
+ xfree (key_from_hexgrip);
+ }
+ else
+ {
+ const char *curve = NULL;
+
+ if (subkey_algo)
+ {
+ /* Create primary and subkey at once. */
+ both = 1;
+ if (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_ECDH)
+ {
+ curve = ask_curve (&algo, &subkey_algo, NULL);
+ r = xmalloc_clear( sizeof *r + 20 );
+ r->key = pKEYTYPE;
+ sprintf( r->u.value, "%d", algo);
+ r->next = para;
+ para = r;
+ nbits = 0;
+ r = xmalloc_clear (sizeof *r + strlen (curve));
+ r->key = pKEYCURVE;
+ strcpy (r->u.value, curve);
+ r->next = para;
+ para = r;
+ }
+ else
+ {
+ r = xmalloc_clear( sizeof *r + 20 );
+ r->key = pKEYTYPE;
+ sprintf( r->u.value, "%d", algo);
+ r->next = para;
+ para = r;
+ nbits = ask_keysize (algo, 0);
+ r = xmalloc_clear( sizeof *r + 20 );
+ r->key = pKEYLENGTH;
+ sprintf( r->u.value, "%u", nbits);
+ r->next = para;
+ para = r;
+ }
+ r = xmalloc_clear( sizeof *r + 20 );
+ r->key = pKEYUSAGE;
+ strcpy( r->u.value, "sign" );
+ r->next = para;
+ para = r;
+
+ r = xmalloc_clear( sizeof *r + 20 );
+ r->key = pSUBKEYTYPE;
+ sprintf( r->u.value, "%d", subkey_algo);
+ r->next = para;
+ para = r;
+ r = xmalloc_clear( sizeof *r + 20 );
+ r->key = pSUBKEYUSAGE;
+ strcpy( r->u.value, "encrypt" );
+ r->next = para;
+ para = r;
+
+ if (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_ECDH)
+ {
+ if (algo == PUBKEY_ALGO_EDDSA
+ && subkey_algo == PUBKEY_ALGO_ECDH)
+ {
+ /* Need to switch to a different curve for the
+ encryption key. */
+ curve = "Curve25519";
+ }
+ r = xmalloc_clear (sizeof *r + strlen (curve));
+ r->key = pSUBKEYCURVE;
+ strcpy (r->u.value, curve);
+ r->next = para;
+ para = r;
+ }
+ }
+ else /* Create only a single key. */
+ {
+ /* For ECC we need to ask for the curve before storing the
+ algo because ask_curve may change the algo. */
+ if (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_ECDH)
+ {
+ curve = ask_curve (&algo, NULL, NULL);
+ r = xmalloc_clear (sizeof *r + strlen (curve));
+ r->key = pKEYCURVE;
+ strcpy (r->u.value, curve);
+ r->next = para;
+ para = r;
+ }
+
+ r = xmalloc_clear( sizeof *r + 20 );
+ r->key = pKEYTYPE;
+ sprintf( r->u.value, "%d", algo );
+ r->next = para;
+ para = r;
+
+ if (use)
+ {
+ r = xmalloc_clear( sizeof *r + 25 );
+ r->key = pKEYUSAGE;
+ sprintf( r->u.value, "%s%s%s",
+ (use & PUBKEY_USAGE_SIG)? "sign ":"",
+ (use & PUBKEY_USAGE_ENC)? "encrypt ":"",
+ (use & PUBKEY_USAGE_AUTH)? "auth":"" );
+ r->next = para;
+ para = r;
+ }
+ nbits = 0;
+ }
+
+ if (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_ECDH)
+ {
+ /* The curve has already been set. */
+ }
+ else
+ {
+ nbits = ask_keysize (both? subkey_algo : algo, nbits);
+ r = xmalloc_clear( sizeof *r + 20 );
+ r->key = both? pSUBKEYLENGTH : pKEYLENGTH;
+ sprintf( r->u.value, "%u", nbits);
+ r->next = para;
+ para = r;
+ }
+ }
+ }
+ else /* Default key generation. */
+ {
+ int subalgo;
+ unsigned int size, subsize;
+ unsigned int keyuse, subkeyuse;
+ const char *curve, *subcurve;
+ char *keygrip, *subkeygrip;
+
+ tty_printf ( _("Note: Use \"%s %s\""
+ " for a full featured key generation dialog.\n"),
+#if USE_GPG2_HACK
+ GPG_NAME "2"
+#else
+ GPG_NAME
+#endif
+ , "--full-generate-key" );
+
+ err = parse_key_parameter_string (ctrl, NULL, -1, 0,
+ &algo, &size, &keyuse, &curve,
+ &keygrip,
+ &subalgo, &subsize,
+ &subkeyuse, &subcurve,
+ &subkeygrip);
+ if (err)
+ {
+ log_error (_("Key generation failed: %s\n"), gpg_strerror (err));
+ return;
+ }
+ para = quickgen_set_para (para, 0,
+ algo, size, curve, keyuse,
+ keygrip);
+ if (subalgo)
+ para = quickgen_set_para (para, 1,
+ subalgo, subsize, subcurve, subkeyuse,
+ subkeygrip);
+
+ xfree (keygrip);
+ xfree (subkeygrip);
+ }
+
+
+ expire = full? ask_expire_interval (0, NULL)
+ : parse_expire_string (default_expiration_interval);
+ r = xcalloc (1, sizeof *r + 20);
+ r->key = pKEYEXPIRE;
+ r->u.expire = expire;
+ r->next = para;
+ para = r;
+ r = xcalloc (1, sizeof *r + 20);
+ r->key = pSUBKEYEXPIRE;
+ r->u.expire = expire;
+ r->next = para;
+ para = r;
+
+ uid = ask_user_id (0, full, NULL);
+ if (!uid)
+ {
+ log_error(_("Key generation canceled.\n"));
+ release_parameter_list( para );
+ return;
+ }
+ r = xcalloc (1, sizeof *r + strlen (uid));
+ r->key = pUSERID;
+ strcpy (r->u.value, uid);
+ r->next = para;
+ para = r;
+
+ proc_parameter_file (ctrl, para, "[internal]", &outctrl, !!card_serialno);
+ release_parameter_list (para);
+}
+
+
+/* Create and delete a dummy packet to start off a list of kbnodes. */
+static void
+start_tree(KBNODE *tree)
+{
+ PACKET *pkt;
+
+ pkt=xmalloc_clear(sizeof(*pkt));
+ pkt->pkttype=PKT_NONE;
+ *tree=new_kbnode(pkt);
+ delete_kbnode(*tree);
+}
+
+
+/* Write the *protected* secret key to the file. */
+static gpg_error_t
+card_write_key_to_backup_file (PKT_public_key *sk, const char *backup_dir)
+{
+ gpg_error_t err = 0;
+ int rc;
+ char keyid_buffer[2 * 8 + 1];
+ char name_buffer[50];
+ char *fname;
+ IOBUF fp;
+ mode_t oldmask;
+ PACKET *pkt = NULL;
+
+ format_keyid (pk_keyid (sk), KF_LONG, keyid_buffer, sizeof (keyid_buffer));
+ snprintf (name_buffer, sizeof name_buffer, "sk_%s.gpg", keyid_buffer);
+
+ fname = make_filename (backup_dir, name_buffer, NULL);
+ /* Note that the umask call is not anymore needed because
+ iobuf_create now takes care of it. However, it does not harm
+ and thus we keep it. */
+ oldmask = umask (077);
+ if (is_secured_filename (fname))
+ {
+ fp = NULL;
+ gpg_err_set_errno (EPERM);
+ }
+ else
+ fp = iobuf_create (fname, 1);
+ umask (oldmask);
+ if (!fp)
+ {
+ err = gpg_error_from_syserror ();
+ log_error (_("can't create backup file '%s': %s\n"), fname, strerror (errno) );
+ goto leave;
+ }
+
+ pkt = xcalloc (1, sizeof *pkt);
+ pkt->pkttype = PKT_SECRET_KEY;
+ pkt->pkt.secret_key = sk;
+
+ rc = build_packet (fp, pkt);
+ if (rc)
+ {
+ log_error ("build packet failed: %s\n", gpg_strerror (rc));
+ iobuf_cancel (fp);
+ }
+ else
+ {
+ char *fprbuf;
+
+ iobuf_close (fp);
+ iobuf_ioctl (NULL, IOBUF_IOCTL_INVALIDATE_CACHE, 0, (char*)fname);
+ log_info (_("Note: backup of card key saved to '%s'\n"), fname);
+
+ fprbuf = hexfingerprint (sk, NULL, 0);
+ if (!fprbuf)
+ {
+ err = gpg_error_from_syserror ();
+ goto leave;
+ }
+ write_status_text_and_buffer (STATUS_BACKUP_KEY_CREATED, fprbuf,
+ fname, strlen (fname), 0);
+ xfree (fprbuf);
+ }
+
+ leave:
+ xfree (pkt);
+ xfree (fname);
+ return err;
+}
+
+
+/* Store key to card and make a backup file in OpenPGP format. */
+static gpg_error_t
+card_store_key_with_backup (ctrl_t ctrl, PKT_public_key *sub_psk,
+ const char *backup_dir)
+{
+ PKT_public_key *sk;
+ gnupg_isotime_t timestamp;
+ gpg_error_t err;
+ char *hexgrip;
+ int rc;
+ struct agent_card_info_s info;
+ gcry_cipher_hd_t cipherhd = NULL;
+ char *cache_nonce = NULL;
+ void *kek = NULL;
+ size_t keklen;
+
+ sk = copy_public_key (NULL, sub_psk);
+ if (!sk)
+ return gpg_error_from_syserror ();
+
+ epoch2isotime (timestamp, (time_t)sk->timestamp);
+ err = hexkeygrip_from_pk (sk, &hexgrip);
+ if (err)
+ return err;
+
+ memset(&info, 0, sizeof (info));
+ rc = agent_scd_getattr ("SERIALNO", &info);
+ if (rc)
+ return (gpg_error_t)rc;
+
+ rc = agent_keytocard (hexgrip, 2, 1, info.serialno, timestamp);
+ xfree (info.serialno);
+ if (rc)
+ {
+ err = (gpg_error_t)rc;
+ goto leave;
+ }
+
+ err = agent_keywrap_key (ctrl, 1, &kek, &keklen);
+ if (err)
+ {
+ log_error ("error getting the KEK: %s\n", gpg_strerror (err));
+ goto leave;
+ }
+
+ err = gcry_cipher_open (&cipherhd, GCRY_CIPHER_AES128,
+ GCRY_CIPHER_MODE_AESWRAP, 0);
+ if (!err)
+ err = gcry_cipher_setkey (cipherhd, kek, keklen);
+ if (err)
+ {
+ log_error ("error setting up an encryption context: %s\n",
+ gpg_strerror (err));
+ goto leave;
+ }
+
+ err = receive_seckey_from_agent (ctrl, cipherhd, 0,
+ &cache_nonce, hexgrip, sk);
+ if (err)
+ {
+ log_error ("error getting secret key from agent: %s\n",
+ gpg_strerror (err));
+ goto leave;
+ }
+
+ err = card_write_key_to_backup_file (sk, backup_dir);
+ if (err)
+ log_error ("writing card key to backup file: %s\n", gpg_strerror (err));
+ else
+ /* Remove secret key data in agent side. */
+ agent_scd_learn (NULL, 1);
+
+ leave:
+ xfree (cache_nonce);
+ gcry_cipher_close (cipherhd);
+ xfree (kek);
+ xfree (hexgrip);
+ free_public_key (sk);
+ return err;
+}
+
+
+static void
+do_generate_keypair (ctrl_t ctrl, struct para_data_s *para,
+ struct output_control_s *outctrl, int card)
+{
+ gpg_error_t err;
+ KBNODE pub_root = NULL;
+ const char *s;
+ PKT_public_key *pri_psk = NULL;
+ PKT_public_key *sub_psk = NULL;
+ struct revocation_key *revkey;
+ int did_sub = 0;
+ u32 timestamp;
+ char *cache_nonce = NULL;
+ int algo;
+ u32 expire;
+ const char *key_from_hexgrip = NULL;
+
+ if (outctrl->dryrun)
+ {
+ log_info("dry-run mode - key generation skipped\n");
+ return;
+ }
+
+ if ( outctrl->use_files )
+ {
+ if ( outctrl->pub.newfname )
+ {
+ iobuf_close(outctrl->pub.stream);
+ outctrl->pub.stream = NULL;
+ if (outctrl->pub.fname)
+ iobuf_ioctl (NULL, IOBUF_IOCTL_INVALIDATE_CACHE,
+ 0, (char*)outctrl->pub.fname);
+ xfree( outctrl->pub.fname );
+ outctrl->pub.fname = outctrl->pub.newfname;
+ outctrl->pub.newfname = NULL;
+
+ if (is_secured_filename (outctrl->pub.fname) )
+ {
+ outctrl->pub.stream = NULL;
+ gpg_err_set_errno (EPERM);
+ }
+ else
+ outctrl->pub.stream = iobuf_create (outctrl->pub.fname, 0);
+ if (!outctrl->pub.stream)
+ {
+ log_error(_("can't create '%s': %s\n"), outctrl->pub.newfname,
+ strerror(errno) );
+ return;
+ }
+ if (opt.armor)
+ {
+ outctrl->pub.afx->what = 1;
+ push_armor_filter (outctrl->pub.afx, outctrl->pub.stream);
+ }
+ }
+ log_assert( outctrl->pub.stream );
+ if (opt.verbose)
+ log_info (_("writing public key to '%s'\n"), outctrl->pub.fname );
+ }
+
+
+ /* We create the packets as a tree of kbnodes. Because the
+ structure we create is known in advance we simply generate a
+ linked list. The first packet is a dummy packet which we flag as
+ deleted. The very first packet must always be a KEY packet. */
+
+ start_tree (&pub_root);
+
+ timestamp = get_parameter_u32 (para, pKEYCREATIONDATE);
+ if (!timestamp)
+ timestamp = make_timestamp ();
+
+ /* Note that, depending on the backend (i.e. the used scdaemon
+ version), the card key generation may update TIMESTAMP for each
+ key. Thus we need to pass TIMESTAMP to all signing function to
+ make sure that the binding signature is done using the timestamp
+ of the corresponding (sub)key and not that of the primary key.
+ An alternative implementation could tell the signing function the
+ node of the subkey but that is more work than just to pass the
+ current timestamp. */
+
+ algo = get_parameter_algo (ctrl, para, pKEYTYPE, NULL );
+ expire = get_parameter_u32( para, pKEYEXPIRE );
+ key_from_hexgrip = get_parameter_value (para, pKEYGRIP);
+ if (key_from_hexgrip)
+ err = do_create_from_keygrip (ctrl, algo, key_from_hexgrip,
+ pub_root, timestamp, expire, 0);
+ else if (!card)
+ err = do_create (algo,
+ get_parameter_uint( para, pKEYLENGTH ),
+ get_parameter_value (para, pKEYCURVE),
+ pub_root,
+ timestamp,
+ expire, 0,
+ outctrl->keygen_flags,
+ get_parameter_passphrase (para),
+ &cache_nonce, NULL);
+ else
+ err = gen_card_key (1, algo,
+ 1, pub_root, &timestamp,
+ expire);
+
+ /* Get the pointer to the generated public key packet. */
+ if (!err)
+ {
+ pri_psk = pub_root->next->pkt->pkt.public_key;
+ log_assert (pri_psk);
+
+ /* Make sure a few fields are correctly set up before going
+ further. */
+ pri_psk->flags.primary = 1;
+ keyid_from_pk (pri_psk, NULL);
+ /* We don't use pk_keyid to get keyid, because it also asserts
+ that main_keyid is set! */
+ keyid_copy (pri_psk->main_keyid, pri_psk->keyid);
+ }
+
+ if (!err && (revkey = get_parameter_revkey (para, pREVOKER)))
+ err = write_direct_sig (ctrl, pub_root, pri_psk,
+ revkey, timestamp, cache_nonce);
+
+ if (!err && (s = get_parameter_value (para, pUSERID)))
+ {
+ err = write_uid (pub_root, s );
+ if (!err)
+ err = write_selfsigs (ctrl, pub_root, pri_psk,
+ get_parameter_uint (para, pKEYUSAGE), timestamp,
+ cache_nonce);
+ }
+
+ /* Write the auth key to the card before the encryption key. This
+ is a partial workaround for a PGP bug (as of this writing, all
+ versions including 8.1), that causes it to try and encrypt to
+ the most recent subkey regardless of whether that subkey is
+ actually an encryption type. In this case, the auth key is an
+ RSA key so it succeeds. */
+
+ if (!err && card && get_parameter (para, pAUTHKEYTYPE))
+ {
+ err = gen_card_key (3, get_parameter_algo (ctrl, para,
+ pAUTHKEYTYPE, NULL ),
+ 0, pub_root, &timestamp, expire);
+ if (!err)
+ err = write_keybinding (ctrl, pub_root, pri_psk, NULL,
+ PUBKEY_USAGE_AUTH, timestamp, cache_nonce);
+ }
+
+ if (!err && get_parameter (para, pSUBKEYTYPE))
+ {
+ int subkey_algo = get_parameter_algo (ctrl, para, pSUBKEYTYPE, NULL);
+
+ s = NULL;
+ key_from_hexgrip = get_parameter_value (para, pSUBKEYGRIP);
+ if (key_from_hexgrip)
+ err = do_create_from_keygrip (ctrl, subkey_algo, key_from_hexgrip,
+ pub_root, timestamp,
+ get_parameter_u32 (para, pSUBKEYEXPIRE),
+ 1);
+ else if (!card || (s = get_parameter_value (para, pCARDBACKUPKEY)))
+ {
+ err = do_create (subkey_algo,
+ get_parameter_uint (para, pSUBKEYLENGTH),
+ get_parameter_value (para, pSUBKEYCURVE),
+ pub_root,
+ timestamp,
+ get_parameter_u32 (para, pSUBKEYEXPIRE), 1,
+ s ? KEYGEN_FLAG_NO_PROTECTION : outctrl->keygen_flags,
+ get_parameter_passphrase (para),
+ &cache_nonce, NULL);
+ /* Get the pointer to the generated public subkey packet. */
+ if (!err)
+ {
+ kbnode_t node;
+
+ for (node = pub_root; node; node = node->next)
+ if (node->pkt->pkttype == PKT_PUBLIC_SUBKEY)
+ sub_psk = node->pkt->pkt.public_key;
+ log_assert (sub_psk);
+
+ if (s)
+ err = card_store_key_with_backup (ctrl,
+ sub_psk, gnupg_homedir ());
+ }
+ }
+ else
+ {
+ err = gen_card_key (2, subkey_algo, 0, pub_root, &timestamp, expire);
+ }
+
+ if (!err)
+ err = write_keybinding (ctrl, pub_root, pri_psk, sub_psk,
+ get_parameter_uint (para, pSUBKEYUSAGE),
+ timestamp, cache_nonce);
+ did_sub = 1;
+ }
+
+ if (!err && outctrl->use_files) /* Direct write to specified files. */
+ {
+ err = write_keyblock (outctrl->pub.stream, pub_root);
+ if (err)
+ log_error ("can't write public key: %s\n", gpg_strerror (err));
+ }
+ else if (!err) /* Write to the standard keyrings. */
+ {
+ KEYDB_HANDLE pub_hd;
+
+ pub_hd = keydb_new ();
+ if (!pub_hd)
+ err = gpg_error_from_syserror ();
+ else
+ {
+ err = keydb_locate_writable (pub_hd);
+ if (err)
+ log_error (_("no writable public keyring found: %s\n"),
+ gpg_strerror (err));
+ }
+
+ if (!err && opt.verbose)
+ {
+ log_info (_("writing public key to '%s'\n"),
+ keydb_get_resource_name (pub_hd));
+ }
+
+ if (!err)
+ {
+ err = keydb_insert_keyblock (pub_hd, pub_root);
+ if (err)
+ log_error (_("error writing public keyring '%s': %s\n"),
+ keydb_get_resource_name (pub_hd), gpg_strerror (err));
+ }
+
+ keydb_release (pub_hd);
+
+ if (!err)
+ {
+ int no_enc_rsa;
+ PKT_public_key *pk;
+
+ no_enc_rsa = ((get_parameter_algo (ctrl, para, pKEYTYPE, NULL)
+ == PUBKEY_ALGO_RSA)
+ && get_parameter_uint (para, pKEYUSAGE)
+ && !((get_parameter_uint (para, pKEYUSAGE)
+ & PUBKEY_USAGE_ENC)) );
+
+ pk = find_kbnode (pub_root, PKT_PUBLIC_KEY)->pkt->pkt.public_key;
+
+ update_ownertrust (ctrl, pk,
+ ((get_ownertrust (ctrl, pk) & ~TRUST_MASK)
+ | TRUST_ULTIMATE ));
+
+ gen_standard_revoke (ctrl, pk, cache_nonce);
+
+ /* Get rid of the first empty packet. */
+ commit_kbnode (&pub_root);
+
+ if (!opt.batch)
+ {
+ tty_printf (_("public and secret key created and signed.\n") );
+ tty_printf ("\n");
+ merge_keys_and_selfsig (ctrl, pub_root);
+
+ list_keyblock_direct (ctrl, pub_root, 0, 1,
+ opt.fingerprint || opt.with_fingerprint,
+ 1);
+ }
+
+
+ if (!opt.batch
+ && (get_parameter_algo (ctrl, para,
+ pKEYTYPE, NULL) == PUBKEY_ALGO_DSA
+ || no_enc_rsa )
+ && !get_parameter (para, pSUBKEYTYPE) )
+ {
+ tty_printf(_("Note that this key cannot be used for "
+ "encryption. You may want to use\n"
+ "the command \"--edit-key\" to generate a "
+ "subkey for this purpose.\n") );
+ }
+ }
+ }
+
+ if (err)
+ {
+ if (opt.batch)
+ log_error ("key generation failed: %s\n", gpg_strerror (err) );
+ else
+ tty_printf (_("Key generation failed: %s\n"), gpg_strerror (err) );
+ write_status_error (card? "card_key_generate":"key_generate", err);
+ print_status_key_not_created ( get_parameter_value (para, pHANDLE) );
+ }
+ else
+ {
+ PKT_public_key *pk = find_kbnode (pub_root,
+ PKT_PUBLIC_KEY)->pkt->pkt.public_key;
+ print_status_key_created (did_sub? 'B':'P', pk,
+ get_parameter_value (para, pHANDLE));
+ }
+
+ release_kbnode (pub_root);
+ xfree (cache_nonce);
+}
+
+
+static gpg_error_t
+parse_algo_usage_expire (ctrl_t ctrl, int for_subkey,
+ const char *algostr, const char *usagestr,
+ const char *expirestr,
+ int *r_algo, unsigned int *r_usage, u32 *r_expire,
+ unsigned int *r_nbits, const char **r_curve,
+ char **r_keygrip)
+{
+ gpg_error_t err;
+ int algo;
+ unsigned int use, nbits;
+ u32 expire;
+ int wantuse;
+ const char *curve = NULL;
+
+ *r_curve = NULL;
+ if (r_keygrip)
+ *r_keygrip = NULL;
+
+ nbits = 0;
+
+ /* Parse the algo string. */
+ if (algostr && *algostr == '&' && strlen (algostr) == 41)
+ {
+ /* Take algo from existing key. */
+ algo = check_keygrip (ctrl, algostr+1);
+ /* FIXME: We need the curve name as well. */
+ return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
+ }
+
+ err = parse_key_parameter_string (ctrl, algostr, for_subkey? 1 : 0,
+ usagestr? parse_usagestr (usagestr):0,
+ &algo, &nbits, &use, &curve,
+ r_keygrip,
+ NULL, NULL, NULL, NULL, NULL);
+ if (err)
+ {
+ if (r_keygrip)
+ {
+ xfree (*r_keygrip);
+ *r_keygrip = NULL;
+ }
+ return err;
+ }
+
+ /* Parse the usage string. */
+ if (!usagestr || !*usagestr
+ || !ascii_strcasecmp (usagestr, "default") || !strcmp (usagestr, "-"))
+ ; /* Keep usage from parse_key_parameter_string. */
+ else if ((wantuse = parse_usagestr (usagestr)) != -1)
+ use = wantuse;
+ else
+ {
+ if (r_keygrip)
+ {
+ xfree (*r_keygrip);
+ *r_keygrip = NULL;
+ }
+ return gpg_error (GPG_ERR_INV_VALUE);
+ }
+
+ /* Make sure a primary key has the CERT usage. */
+ if (!for_subkey)
+ use |= PUBKEY_USAGE_CERT;
+
+ /* Check that usage is possible. NB: We have the same check in
+ * parse_key_parameter_string but need it here again in case the
+ * separate usage value has been given. */
+ if (/**/((use & (PUBKEY_USAGE_SIG|PUBKEY_USAGE_AUTH|PUBKEY_USAGE_CERT))
+ && !pubkey_get_nsig (algo))
+ || ((use & PUBKEY_USAGE_ENC)
+ && !pubkey_get_nenc (algo))
+ || (for_subkey && (use & PUBKEY_USAGE_CERT)))
+ {
+ if (r_keygrip)
+ {
+ xfree (*r_keygrip);
+ *r_keygrip = NULL;
+ }
+ return gpg_error (GPG_ERR_WRONG_KEY_USAGE);
+ }
+
+ /* Parse the expire string. */
+ expire = parse_expire_string (expirestr);
+ if (expire == (u32)-1 )
+ {
+ if (r_keygrip)
+ {
+ xfree (*r_keygrip);
+ *r_keygrip = NULL;
+ }
+ return gpg_error (GPG_ERR_INV_VALUE);
+ }
+
+ if (curve)
+ *r_curve = curve;
+ *r_algo = algo;
+ *r_usage = use;
+ *r_expire = expire;
+ *r_nbits = nbits;
+ return 0;
+}
+
+
+/* Add a new subkey to an existing key. Returns 0 if a new key has
+ been generated and put into the keyblocks. If any of ALGOSTR,
+ USAGESTR, or EXPIRESTR is NULL interactive mode is used. */
+gpg_error_t
+generate_subkeypair (ctrl_t ctrl, kbnode_t keyblock, const char *algostr,
+ const char *usagestr, const char *expirestr)
+{
+ gpg_error_t err = 0;
+ int interactive;
+ kbnode_t node;
+ PKT_public_key *pri_psk = NULL;
+ PKT_public_key *sub_psk = NULL;
+ int algo;
+ unsigned int use;
+ u32 expire;
+ unsigned int nbits = 0;
+ const char *curve = NULL;
+ u32 cur_time;
+ char *key_from_hexgrip = NULL;
+ char *hexgrip = NULL;
+ char *serialno = NULL;
+ char *cache_nonce = NULL;
+ char *passwd_nonce = NULL;
+
+ interactive = (!algostr || !usagestr || !expirestr);
+
+ /* Break out the primary key. */
+ node = find_kbnode (keyblock, PKT_PUBLIC_KEY);
+ if (!node)
+ {
+ log_error ("Oops; primary key missing in keyblock!\n");
+ err = gpg_error (GPG_ERR_BUG);
+ goto leave;
+ }
+ pri_psk = node->pkt->pkt.public_key;
+
+ cur_time = make_timestamp ();
+
+ if (pri_psk->timestamp > cur_time)
+ {
+ ulong d = pri_psk->timestamp - cur_time;
+ log_info ( d==1 ? _("key has been created %lu second "
+ "in future (time warp or clock problem)\n")
+ : _("key has been created %lu seconds "
+ "in future (time warp or clock problem)\n"), d );
+ if (!opt.ignore_time_conflict)
+ {
+ err = gpg_error (GPG_ERR_TIME_CONFLICT);
+ goto leave;
+ }
+ }
+
+ if (pri_psk->version < 4)
+ {
+ log_info (_("Note: creating subkeys for v3 keys "
+ "is not OpenPGP compliant\n"));
+ err = gpg_error (GPG_ERR_CONFLICT);
+ goto leave;
+ }
+
+ err = hexkeygrip_from_pk (pri_psk, &hexgrip);
+ if (err)
+ goto leave;
+ if (agent_get_keyinfo (NULL, hexgrip, &serialno, NULL))
+ {
+ if (interactive)
+ tty_printf (_("Secret parts of primary key are not available.\n"));
+ else
+ log_info ( _("Secret parts of primary key are not available.\n"));
+ err = gpg_error (GPG_ERR_NO_SECKEY);
+ goto leave;
+ }
+ if (serialno)
+ {
+ if (interactive)
+ tty_printf (_("Secret parts of primary key are stored on-card.\n"));
+ else
+ log_info ( _("Secret parts of primary key are stored on-card.\n"));
+ }
+
+ if (interactive)
+ {
+ algo = ask_algo (ctrl, 1, NULL, &use, &key_from_hexgrip);
+ log_assert (algo);
+
+ if (key_from_hexgrip)
+ nbits = 0;
+ else if (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_ECDH)
+ curve = ask_curve (&algo, NULL, NULL);
+ else
+ nbits = ask_keysize (algo, 0);
+
+ expire = ask_expire_interval (0, NULL);
+ if (!cpr_enabled() && !cpr_get_answer_is_yes("keygen.sub.okay",
+ _("Really create? (y/N) ")))
+ {
+ err = gpg_error (GPG_ERR_CANCELED);
+ goto leave;
+ }
+ }
+ else /* Unattended mode. */
+ {
+ err = parse_algo_usage_expire (ctrl, 1, algostr, usagestr, expirestr,
+ &algo, &use, &expire, &nbits, &curve,
+ &key_from_hexgrip);
+ if (err)
+ goto leave;
+ }
+
+ /* Verify the passphrase now so that we get a cache item for the
+ * primary key passphrase. The agent also returns a passphrase
+ * nonce, which we can use to set the passphrase for the subkey to
+ * that of the primary key. */
+ {
+ char *desc = gpg_format_keydesc (ctrl, pri_psk, FORMAT_KEYDESC_NORMAL, 1);
+ err = agent_passwd (ctrl, hexgrip, desc, 1 /*=verify*/,
+ &cache_nonce, &passwd_nonce);
+ xfree (desc);
+ if (gpg_err_code (err) == GPG_ERR_NOT_IMPLEMENTED
+ && gpg_err_source (err) == GPG_ERR_SOURCE_GPGAGENT)
+ err = 0; /* Very likely that the key is on a card. */
+ if (err)
+ goto leave;
+ }
+
+ /* Start creation. */
+ if (key_from_hexgrip)
+ {
+ err = do_create_from_keygrip (ctrl, algo, key_from_hexgrip,
+ keyblock, cur_time, expire, 1);
+ }
+ else
+ {
+ const char *passwd;
+
+ /* If the pinentry loopback mode is not and we have a static
+ passphrase (i.e. set with --passphrase{,-fd,-file} while in batch
+ mode), we use that passphrase for the new subkey. */
+ if (opt.pinentry_mode != PINENTRY_MODE_LOOPBACK
+ && have_static_passphrase ())
+ passwd = get_static_passphrase ();
+ else
+ passwd = NULL;
+
+ err = do_create (algo, nbits, curve,
+ keyblock, cur_time, expire, 1, 0,
+ passwd, &cache_nonce, &passwd_nonce);
+ }
+ if (err)
+ goto leave;
+
+ /* Get the pointer to the generated public subkey packet. */
+ for (node = keyblock; node; node = node->next)
+ if (node->pkt->pkttype == PKT_PUBLIC_SUBKEY)
+ sub_psk = node->pkt->pkt.public_key;
+
+ /* Write the binding signature. */
+ err = write_keybinding (ctrl, keyblock, pri_psk, sub_psk, use, cur_time,
+ cache_nonce);
+ if (err)
+ goto leave;
+
+ print_status_key_created ('S', sub_psk, NULL);
+
+
+ leave:
+ xfree (key_from_hexgrip);
+ xfree (hexgrip);
+ xfree (serialno);
+ xfree (cache_nonce);
+ xfree (passwd_nonce);
+ if (err)
+ log_error (_("Key generation failed: %s\n"), gpg_strerror (err) );
+ return err;
+}
+
+
+#ifdef ENABLE_CARD_SUPPORT
+/* Generate a subkey on a card. */
+gpg_error_t
+generate_card_subkeypair (ctrl_t ctrl, kbnode_t pub_keyblock,
+ int keyno, const char *serialno)
+{
+ gpg_error_t err = 0;
+ kbnode_t node;
+ PKT_public_key *pri_pk = NULL;
+ unsigned int use;
+ u32 expire;
+ u32 cur_time;
+ struct para_data_s *para = NULL;
+ PKT_public_key *sub_pk = NULL;
+ int algo;
+ struct agent_card_info_s info;
+
+ log_assert (keyno >= 1 && keyno <= 3);
+
+ memset (&info, 0, sizeof (info));
+ err = agent_scd_getattr ("KEY-ATTR", &info);
+ if (err)
+ {
+ log_error (_("error getting current key info: %s\n"), gpg_strerror (err));
+ return err;
+ }
+ algo = info.key_attr[keyno-1].algo;
+
+ para = xtrycalloc (1, sizeof *para + strlen (serialno) );
+ if (!para)
+ {
+ err = gpg_error_from_syserror ();
+ goto leave;
+ }
+ para->key = pSERIALNO;
+ strcpy (para->u.value, serialno);
+
+ /* Break out the primary secret key */
+ node = find_kbnode (pub_keyblock, PKT_PUBLIC_KEY);
+ if (!node)
+ {
+ log_error ("Oops; public key lost!\n");
+ err = gpg_error (GPG_ERR_INTERNAL);
+ goto leave;
+ }
+ pri_pk = node->pkt->pkt.public_key;
+
+ cur_time = make_timestamp();
+ if (pri_pk->timestamp > cur_time)
+ {
+ ulong d = pri_pk->timestamp - cur_time;
+ log_info (d==1 ? _("key has been created %lu second "
+ "in future (time warp or clock problem)\n")
+ : _("key has been created %lu seconds "
+ "in future (time warp or clock problem)\n"), d );
+ if (!opt.ignore_time_conflict)
+ {
+ err = gpg_error (GPG_ERR_TIME_CONFLICT);
+ goto leave;
+ }
+ }
+
+ if (pri_pk->version < 4)
+ {
+ log_info (_("Note: creating subkeys for v3 keys "
+ "is not OpenPGP compliant\n"));
+ err = gpg_error (GPG_ERR_NOT_SUPPORTED);
+ goto leave;
+ }
+
+ expire = ask_expire_interval (0, NULL);
+ if (keyno == 1)
+ use = PUBKEY_USAGE_SIG;
+ else if (keyno == 2)
+ use = PUBKEY_USAGE_ENC;
+ else
+ use = PUBKEY_USAGE_AUTH;
+ if (!cpr_enabled() && !cpr_get_answer_is_yes("keygen.cardsub.okay",
+ _("Really create? (y/N) ")))
+ {
+ err = gpg_error (GPG_ERR_CANCELED);
+ goto leave;
+ }
+
+ /* Note, that depending on the backend, the card key generation may
+ update CUR_TIME. */
+ err = gen_card_key (keyno, algo, 0, pub_keyblock, &cur_time, expire);
+ /* Get the pointer to the generated public subkey packet. */
+ if (!err)
+ {
+ for (node = pub_keyblock; node; node = node->next)
+ if (node->pkt->pkttype == PKT_PUBLIC_SUBKEY)
+ sub_pk = node->pkt->pkt.public_key;
+ log_assert (sub_pk);
+ err = write_keybinding (ctrl, pub_keyblock, pri_pk, sub_pk,
+ use, cur_time, NULL);
+ }
+
+ leave:
+ if (err)
+ log_error (_("Key generation failed: %s\n"), gpg_strerror (err) );
+ else
+ print_status_key_created ('S', sub_pk, NULL);
+ release_parameter_list (para);
+ return err;
+}
+#endif /* !ENABLE_CARD_SUPPORT */
+
+/*
+ * Write a keyblock to an output stream
+ */
+static int
+write_keyblock( IOBUF out, KBNODE node )
+{
+ for( ; node ; node = node->next )
+ {
+ if(!is_deleted_kbnode(node))
+ {
+ int rc = build_packet( out, node->pkt );
+ if( rc )
+ {
+ log_error("build_packet(%d) failed: %s\n",
+ node->pkt->pkttype, gpg_strerror (rc) );
+ return rc;
+ }
+ }
+ }
+
+ return 0;
+}
+
+
+/* Note that timestamp is an in/out arg. */
+static gpg_error_t
+gen_card_key (int keyno, int algo, int is_primary, kbnode_t pub_root,
+ u32 *timestamp, u32 expireval)
+{
+#ifdef ENABLE_CARD_SUPPORT
+ gpg_error_t err;
+ PACKET *pkt;
+ PKT_public_key *pk;
+ char keyid[10];
+ unsigned char *public;
+ gcry_sexp_t s_key;
+
+ snprintf (keyid, DIM(keyid), "OPENPGP.%d", keyno);
+
+ pk = xtrycalloc (1, sizeof *pk );
+ if (!pk)
+ return gpg_error_from_syserror ();
+ pkt = xtrycalloc (1, sizeof *pkt);
+ if (!pkt)
+ {
+ xfree (pk);
+ return gpg_error_from_syserror ();
+ }
+
+ /* Note: SCD knows the serialnumber, thus there is no point in passing it. */
+ err = agent_scd_genkey (keyno, 1, timestamp);
+ /* The code below is not used because we force creation of
+ * the a card key (3rd arg).
+ * if (gpg_err_code (rc) == GPG_ERR_EEXIST)
+ * {
+ * tty_printf ("\n");
+ * log_error ("WARNING: key does already exists!\n");
+ * tty_printf ("\n");
+ * if ( cpr_get_answer_is_yes( "keygen.card.replace_key",
+ * _("Replace existing key? ")))
+ * rc = agent_scd_genkey (keyno, 1, timestamp);
+ * }
+ */
+ if (err)
+ {
+ log_error ("key generation failed: %s\n", gpg_strerror (err));
+ xfree (pkt);
+ xfree (pk);
+ return err;
+ }
+
+ /* Send the READKEY command so that the agent creates a shadow key for
+ card key. We need to do that now so that we are able to create
+ the self-signatures. */
+ err = agent_readkey (NULL, 1, keyid, &public);
+ if (err)
+ return err;
+ err = gcry_sexp_sscan (&s_key, NULL, public,
+ gcry_sexp_canon_len (public, 0, NULL, NULL));
+ xfree (public);
+ if (err)
+ return err;
+
+ if (algo == PUBKEY_ALGO_RSA)
+ err = key_from_sexp (pk->pkey, s_key, "public-key", "ne");
+ else if (algo == PUBKEY_ALGO_ECDSA
+ || algo == PUBKEY_ALGO_EDDSA
+ || algo == PUBKEY_ALGO_ECDH )
+ err = ecckey_from_sexp (pk->pkey, s_key, algo);
+ else
+ err = gpg_error (GPG_ERR_PUBKEY_ALGO);
+ gcry_sexp_release (s_key);
+
+ if (err)
+ {
+ log_error ("key_from_sexp failed: %s\n", gpg_strerror (err) );
+ free_public_key (pk);
+ return err;
+ }
+
+ pk->timestamp = *timestamp;
+ pk->version = 4;
+ if (expireval)
+ pk->expiredate = pk->timestamp + expireval;
+ pk->pubkey_algo = algo;
+
+ pkt->pkttype = is_primary ? PKT_PUBLIC_KEY : PKT_PUBLIC_SUBKEY;
+ pkt->pkt.public_key = pk;
+ add_kbnode (pub_root, new_kbnode (pkt));
+
+ return 0;
+#else
+ (void)keyno;
+ (void)is_primary;
+ (void)pub_root;
+ (void)timestamp;
+ (void)expireval;
+ return gpg_error (GPG_ERR_NOT_SUPPORTED);
+#endif /*!ENABLE_CARD_SUPPORT*/
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 12:56:31 +0000