diff options
Diffstat (limited to 'g10/gpgcompose.c')
| -rw-r--r-- | g10/gpgcompose.c | 3089 |
1 files changed, 3089 insertions, 0 deletions
diff --git a/g10/gpgcompose.c b/g10/gpgcompose.c new file mode 100644 index 0000000..d82995d --- /dev/null +++ b/g10/gpgcompose.c @@ -0,0 +1,3089 @@ +/* gpgcompose.c - Maintainer tool to create OpenPGP messages by hand. + * Copyright (C) 2016 g10 Code GmbH + * + * 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 <errno.h> + +#define INCLUDED_BY_MAIN_MODULE 1 +#include "gpg.h" +#include "packet.h" +#include "keydb.h" +#include "main.h" +#include "options.h" + +static int do_debug; +#define debug(fmt, ...) \ + do { if (do_debug) log_debug (fmt, ##__VA_ARGS__); } while (0) + +/* --encryption, for instance, adds a filter in front of out. There + is an operator (--encryption-pop) to end this. We use the + following infrastructure to make it easy to pop the state. */ +struct filter +{ + void *func; + void *context; + int pkttype; + int partial_block_mode; + struct filter *next; +}; + + +/* Hack to ass CTRL to some functions. */ +static ctrl_t global_ctrl; + + +static struct filter *filters; + +static void +filter_push (iobuf_t out, void *func, void *context, + int type, int partial_block_mode) +{ + gpg_error_t err; + struct filter *f = xmalloc_clear (sizeof (*f)); + f->next = filters; + f->func = func; + f->context = context; + f->pkttype = type; + f->partial_block_mode = partial_block_mode; + + filters = f; + + err = iobuf_push_filter (out, func, context); + if (err) + log_fatal ("Adding filter: %s\n", gpg_strerror (err)); +} + +static void +filter_pop (iobuf_t out, int expected_type) +{ + gpg_error_t err; + struct filter *f = filters; + + log_assert (f); + + if (f->pkttype != expected_type) + log_fatal ("Attempted to pop a %s container, " + "but current container is a %s container.\n", + pkttype_str (f->pkttype), pkttype_str (expected_type)); + + if (f->pkttype == PKT_ENCRYPTED) + { + err = iobuf_pop_filter (out, f->func, f->context); + if (err) + log_fatal ("Popping encryption filter: %s\n", gpg_strerror (err)); + } + else + log_fatal ("FILTERS appears to be corrupted.\n"); + + if (f->partial_block_mode) + iobuf_set_partial_body_length_mode (out, 0); + + filters = f->next; + xfree (f); +} + +/* Return if CIPHER_ID is a valid cipher. */ +static int +valid_cipher (int cipher_id) +{ + return (cipher_id == CIPHER_ALGO_IDEA + || cipher_id == CIPHER_ALGO_3DES + || cipher_id == CIPHER_ALGO_CAST5 + || cipher_id == CIPHER_ALGO_BLOWFISH + || cipher_id == CIPHER_ALGO_AES + || cipher_id == CIPHER_ALGO_AES192 + || cipher_id == CIPHER_ALGO_AES256 + || cipher_id == CIPHER_ALGO_TWOFISH + || cipher_id == CIPHER_ALGO_CAMELLIA128 + || cipher_id == CIPHER_ALGO_CAMELLIA192 + || cipher_id == CIPHER_ALGO_CAMELLIA256); +} + +/* Parse a session key encoded as a string of the form x:HEXDIGITS + where x is the algorithm id. (This is the format emitted by gpg + --show-session-key.) */ +struct session_key +{ + int algo; + int keylen; + char *key; +}; + +static struct session_key +parse_session_key (const char *option, char *p, int require_algo) +{ + char *tail; + struct session_key sk; + + memset (&sk, 0, sizeof (sk)); + + /* Check for the optional "cipher-id:" at the start of the + string. */ + errno = 0; + sk.algo = strtol (p, &tail, 10); + if (! errno && tail && *tail == ':') + { + if (! valid_cipher (sk.algo)) + log_info ("%s: %d is not a known cipher (but using anyways)\n", + option, sk.algo); + p = tail + 1; + } + else if (require_algo) + log_fatal ("%s: Session key must have the form algo:HEXCHARACTERS.\n", + option); + else + sk.algo = 0; + + /* Ignore a leading 0x. */ + if (p[0] == '0' && p[1] == 'x') + p += 2; + + if (strlen (p) % 2 != 0) + log_fatal ("%s: session key must consist of an even number of hexadecimal characters.\n", + option); + + sk.keylen = strlen (p) / 2; + sk.key = xmalloc (sk.keylen); + + if (hex2bin (p, sk.key, sk.keylen) == -1) + log_fatal ("%s: Session key must only contain hexadecimal characters\n", + option); + + return sk; +} + +/* A callback. + + OPTION_STR is the option that was matched. ARGC is the number of + arguments following the option and ARGV are those arguments. + (Thus, argv[0] is the first string following the option and + argv[-1] is the option.) + + COOKIE is the opaque value passed to process_options. */ +typedef int (*option_prcessor_t) (const char *option_str, + int argc, char *argv[], + void *cookie); + +struct option +{ + /* The option that this matches. This must start with "--" or be + the empty string. The empty string matches bare arguments. */ + const char *option; + /* The function to call to process this option. */ + option_prcessor_t func; + /* Documentation. */ + const char *help; +}; + +/* Merge two lists of options. Note: this makes a shallow copy! The + caller must xfree() the result. */ +static struct option * +merge_options (struct option a[], struct option b[]) +{ + int i, j; + struct option *c; + + for (i = 0; a[i].option; i ++) + ; + for (j = 0; b[j].option; j ++) + ; + + c = xmalloc ((i + j + 1) * sizeof (struct option)); + memcpy (c, a, i * sizeof (struct option)); + memcpy (&c[i], b, j * sizeof (struct option)); + c[i + j].option = NULL; + + if (a[i].help && b[j].help) + c[i + j].help = xasprintf ("%s\n\n%s", a[i].help, b[j].help); + else if (a[i].help) + c[i + j].help = a[i].help; + else if (b[j].help) + c[i + j].help = b[j].help; + + return c; +} + +/* Returns whether ARG is an option. All options start with --. */ +static int +is_option (const char *arg) +{ + return arg[0] == '-' && arg[1] == '-'; +} + +/* OPTIONS is a NULL terminated array of struct option:s. Finds the + entry that is the same as ARG. Returns -1 if no entry is found. + The empty string option matches bare arguments. */ +static int +match_option (const struct option options[], const char *arg) +{ + int i; + int bare_arg = ! is_option (arg); + + for (i = 0; options[i].option; i ++) + if ((! bare_arg && strcmp (options[i].option, arg) == 0) + /* Non-options match the empty string. */ + || (bare_arg && options[i].option[0] == '\0')) + return i; + + return -1; +} + +static void +show_help (struct option options[]) +{ + int i; + int max_length = 0; + int space; + + for (i = 0; options[i].option; i ++) + { + const char *option = options[i].option[0] ? options[i].option : "ARG"; + int l = strlen (option); + if (l > max_length) + max_length = l; + } + + space = 72 - (max_length + 2); + if (space < 40) + space = 40; + + for (i = 0; ; i ++) + { + const char *option = options[i].option; + const char *help = options[i].help; + + int l; + int j; + char *tmp; + char *formatted; + char *p; + char *newline; + + if (! option && ! help) + break; + + if (option) + { + const char *o = option[0] ? option : "ARG"; + l = strlen (o); + fprintf (stdout, "%s", o); + } + + if (! help) + { + fputc ('\n', stdout); + continue; + } + + if (option) + for (j = l; j < max_length + 2; j ++) + fputc (' ', stdout); + +#define BOLD_START "\033[1m" +#define NORMAL_RESTORE "\033[0m" +#define BOLD(x) BOLD_START x NORMAL_RESTORE + + if (! option || options[i].func) + tmp = (char *) help; + else + tmp = xasprintf ("%s " BOLD("(Unimplemented.)"), help); + + if (! option) + space = 72; + formatted = format_text (tmp, space, space + 4); + if (!formatted) + abort (); + + if (tmp != help) + xfree (tmp); + + if (! option) + { + printf ("\n%s\n", formatted); + break; + } + + for (p = formatted; + p && *p; + p = (*newline == '\0') ? newline : newline + 1) + { + newline = strchr (p, '\n'); + if (! newline) + newline = &p[strlen (p)]; + + l = (size_t) newline - (size_t) p; + + if (p != formatted) + for (j = 0; j < max_length + 2; j ++) + fputc (' ', stdout); + + fwrite (p, l, 1, stdout); + fputc ('\n', stdout); + } + + xfree (formatted); + } +} + +/* Return value is number of consumed argv elements. */ +static int +process_options (const char *parent_option, + struct option break_options[], + struct option local_options[], void *lcookie, + struct option global_options[], void *gcookie, + int argc, char *argv[]) +{ + int i; + for (i = 0; i < argc; i ++) + { + int j; + struct option *option; + void *cookie; + int bare_arg; + option_prcessor_t func; + int consumed; + + if (break_options) + { + j = match_option (break_options, argv[i]); + if (j != -1) + /* Match. Break out. */ + return i; + } + + j = match_option (local_options, argv[i]); + if (j == -1) + { + if (global_options) + j = match_option (global_options, argv[i]); + if (j == -1) + { + if (strcmp (argv[i], "--help") == 0) + { + if (! global_options) + show_help (local_options); + else + { + struct option *combined + = merge_options (local_options, global_options); + show_help (combined); + xfree (combined); + } + g10_exit (0); + } + + if (parent_option) + log_fatal ("%s: Unknown option: %s\n", parent_option, argv[i]); + else + log_fatal ("Unknown option: %s\n", argv[i]); + } + + option = &global_options[j]; + cookie = gcookie; + } + else + { + option = &local_options[j]; + cookie = lcookie; + } + + bare_arg = strcmp (option->option, "") == 0; + + func = option->func; + if (! func) + { + if (bare_arg) + log_fatal ("Bare arguments unimplemented.\n"); + else + log_fatal ("Unimplemented option: %s\n", + option->option); + } + + consumed = func (bare_arg ? parent_option : argv[i], + argc - i - !bare_arg, &argv[i + !bare_arg], + cookie); + i += consumed; + if (bare_arg) + i --; + } + + return i; +} + +/* The keys, subkeys, user ids and user attributes in the order that + they were added. */ +PACKET components[20]; +/* The number of components. */ +int ncomponents; + +static int +add_component (int pkttype, void *component) +{ + int i = ncomponents ++; + + log_assert (i < sizeof (components) / sizeof (components[0])); + log_assert (pkttype == PKT_PUBLIC_KEY + || pkttype == PKT_PUBLIC_SUBKEY + || pkttype == PKT_SECRET_KEY + || pkttype == PKT_SECRET_SUBKEY + || pkttype == PKT_USER_ID + || pkttype == PKT_ATTRIBUTE); + + components[i].pkttype = pkttype; + components[i].pkt.generic = component; + + return i; +} + +static void +dump_component (PACKET *pkt) +{ + struct kbnode_struct kbnode; + + if (! do_debug) + return; + + memset (&kbnode, 0, sizeof (kbnode)); + kbnode.pkt = pkt; + dump_kbnode (&kbnode); +} + +/* Returns the first primary key in COMPONENTS or NULL if there is + none. */ +static PKT_public_key * +primary_key (void) +{ + int i; + for (i = 0; i < ncomponents; i ++) + if (components[i].pkttype == PKT_PUBLIC_KEY) + return components[i].pkt.public_key; + return NULL; +} + +/* The last session key (updated when adding a SK-ESK, PK-ESK or SED + packet. */ +static DEK session_key; + +static int user_id (const char *option, int argc, char *argv[], + void *cookie); +static int public_key (const char *option, int argc, char *argv[], + void *cookie); +static int sk_esk (const char *option, int argc, char *argv[], + void *cookie); +static int pk_esk (const char *option, int argc, char *argv[], + void *cookie); +static int encrypted (const char *option, int argc, char *argv[], + void *cookie); +static int encrypted_pop (const char *option, int argc, char *argv[], + void *cookie); +static int literal (const char *option, int argc, char *argv[], + void *cookie); +static int signature (const char *option, int argc, char *argv[], + void *cookie); +static int copy (const char *option, int argc, char *argv[], + void *cookie); + +static struct option major_options[] = { + { "--user-id", user_id, "Create a user id packet." }, + { "--public-key", public_key, "Create a public key packet." }, + { "--private-key", NULL, "Create a private key packet." }, + { "--public-subkey", public_key, "Create a subkey packet." }, + { "--private-subkey", NULL, "Create a private subkey packet." }, + { "--sk-esk", sk_esk, + "Create a symmetric-key encrypted session key packet." }, + { "--pk-esk", pk_esk, + "Create a public-key encrypted session key packet." }, + { "--encrypted", encrypted, "Create a symmetrically encrypted data packet." }, + { "--encrypted-mdc", encrypted, + "Create a symmetrically encrypted and integrity protected data packet." }, + { "--encrypted-pop", encrypted_pop, + "Pop the most recent encryption container started by either" + " --encrypted or --encrypted-mdc." }, + { "--compressed", NULL, "Create a compressed data packet." }, + { "--literal", literal, "Create a literal (plaintext) data packet." }, + { "--signature", signature, "Create a signature packet." }, + { "--onepass-sig", NULL, "Create a one-pass signature packet." }, + { "--copy", copy, "Copy the specified file." }, + { NULL, NULL, + "To get more information about a given command, use:\n\n" + " $ gpgcompose --command --help to list a command's options."}, +}; + +static struct option global_options[] = { + { NULL, NULL, NULL }, +}; + +/* Make our lives easier and use a static limit for the user name. + 10k is way more than enough anyways... */ +const int user_id_max_len = 10 * 1024; + +static int +user_id_name (const char *option, int argc, char *argv[], void *cookie) +{ + PKT_user_id *uid = cookie; + int l; + + if (argc == 0) + log_fatal ("Usage: %s USER_ID\n", option); + + if (uid->len) + log_fatal ("Attempt to set user id multiple times.\n"); + + l = strlen (argv[0]); + if (l > user_id_max_len) + log_fatal ("user id too long (max: %d)\n", user_id_max_len); + + memcpy (uid->name, argv[0], l); + uid->name[l] = 0; + uid->len = l; + + return 1; +} + +static struct option user_id_options[] = { + { "", user_id_name, + "Set the user id. This is usually in the format " + "\"Name (comment) <email@example.org>\"" }, + { NULL, NULL, + "Example:\n\n" + " $ gpgcompose --user-id \"USERID\" | " GPG_NAME " --list-packets" } +}; + +static int +user_id (const char *option, int argc, char *argv[], void *cookie) +{ + iobuf_t out = cookie; + gpg_error_t err; + PKT_user_id *uid = xmalloc_clear (sizeof (*uid) + user_id_max_len); + int c = add_component (PKT_USER_ID, uid); + int processed; + + processed = process_options (option, + major_options, + user_id_options, uid, + global_options, NULL, + argc, argv); + + if (! uid->len) + log_fatal ("%s: user id not given", option); + + err = build_packet (out, &components[c]); + if (err) + log_fatal ("Serializing user id packet: %s\n", gpg_strerror (err)); + + debug ("Wrote user id packet:\n"); + dump_component (&components[c]); + + return processed; +} + +static int +pk_search_terms (const char *option, int argc, char *argv[], void *cookie) +{ + gpg_error_t err; + KEYDB_HANDLE hd; + KEYDB_SEARCH_DESC desc; + kbnode_t kb; + PKT_public_key *pk = cookie; + PKT_public_key *pk_ref; + int i; + + if (argc == 0) + log_fatal ("Usage: %s KEYID\n", option); + + if (pk->pubkey_algo) + log_fatal ("%s: multiple keys provided\n", option); + + err = classify_user_id (argv[0], &desc, 0); + if (err) + log_fatal ("search terms '%s': %s\n", argv[0], gpg_strerror (err)); + + hd = keydb_new (); + + err = keydb_search (hd, &desc, 1, NULL); + if (err) + log_fatal ("looking up '%s': %s\n", argv[0], gpg_strerror (err)); + + err = keydb_get_keyblock (hd, &kb); + if (err) + log_fatal ("retrieving keyblock for '%s': %s\n", + argv[0], gpg_strerror (err)); + + keydb_release (hd); + + pk_ref = kb->pkt->pkt.public_key; + + /* Copy the timestamp (if not already set), algo and public key + parameters. */ + if (! pk->timestamp) + pk->timestamp = pk_ref->timestamp; + pk->pubkey_algo = pk_ref->pubkey_algo; + for (i = 0; i < pubkey_get_npkey (pk->pubkey_algo); i ++) + pk->pkey[i] = gcry_mpi_copy (pk_ref->pkey[i]); + + release_kbnode (kb); + + return 1; +} + +static int +pk_timestamp (const char *option, int argc, char *argv[], void *cookie) +{ + PKT_public_key *pk = cookie; + char *tail = NULL; + + if (argc == 0) + log_fatal ("Usage: %s TIMESTAMP\n", option); + + errno = 0; + pk->timestamp = parse_timestamp (argv[0], &tail); + if (errno || (tail && *tail)) + log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); + + return 1; +} + +#define TIMESTAMP_HELP \ + "Either as seconds since the epoch or as an ISO 8601 formatted " \ + "string (yyyymmddThhmmss, where the T is a literal)." + +static struct option pk_options[] = { + { "--timestamp", pk_timestamp, + "The creation time. " TIMESTAMP_HELP }, + { "", pk_search_terms, + "The key to copy the creation time and public key parameters from." }, + { NULL, NULL, + "Example:\n\n" + " $ gpgcompose --public-key $KEYID --user-id \"USERID\" \\\n" + " | " GPG_NAME " --list-packets" } +}; + +static int +public_key (const char *option, int argc, char *argv[], void *cookie) +{ + gpg_error_t err; + iobuf_t out = cookie; + PKT_public_key *pk; + int c; + int processed; + int t = (strcmp (option, "--public-key") == 0 + ? PKT_PUBLIC_KEY : PKT_PUBLIC_SUBKEY); + + (void) option; + + pk = xmalloc_clear (sizeof (*pk)); + pk->version = 4; + + c = add_component (t, pk); + + processed = process_options (option, + major_options, + pk_options, pk, + global_options, NULL, + argc, argv); + + if (! pk->pubkey_algo) + log_fatal ("%s: key to extract public key parameters from not given", + option); + + /* Clear the keyid in case we updated one of the relevant fields + after accessing it. */ + pk->keyid[0] = pk->keyid[1] = 0; + + err = build_packet (out, &components[c]); + if (err) + log_fatal ("serializing %s packet: %s\n", + t == PKT_PUBLIC_KEY ? "public key" : "subkey", + gpg_strerror (err)); + + debug ("Wrote %s packet:\n", + t == PKT_PUBLIC_KEY ? "public key" : "subkey"); + dump_component (&components[c]); + + return processed; +} + +struct signinfo +{ + /* Key with which to sign. */ + kbnode_t issuer_kb; + PKT_public_key *issuer_pk; + + /* Overrides the issuer's key id. */ + u32 issuer_keyid[2]; + /* Sets the issuer's keyid to the primary key's key id. */ + int issuer_keyid_self; + + /* Key to sign. */ + PKT_public_key *pk; + /* Subkey to sign. */ + PKT_public_key *sk; + /* User id to sign. */ + PKT_user_id *uid; + + int class; + int digest_algo; + u32 timestamp; + u32 key_expiration; + + byte *cipher_algorithms; + int cipher_algorithms_len; + byte *digest_algorithms; + int digest_algorithms_len; + byte *compress_algorithms; + int compress_algorithms_len; + + u32 expiration; + + int exportable_set; + int exportable; + + int revocable_set; + int revocable; + + int trust_level_set; + byte trust_args[2]; + + char *trust_scope; + + struct revocation_key *revocation_key; + int nrevocation_keys; + + struct notation *notations; + + byte *key_server_preferences; + int key_server_preferences_len; + + char *key_server; + + int primary_user_id_set; + int primary_user_id; + + char *policy_uri; + + byte *key_flags; + int key_flags_len; + + char *signers_user_id; + + byte reason_for_revocation_code; + char *reason_for_revocation; + + byte *features; + int features_len; + + /* Whether to corrupt the signature. */ + int corrupt; +}; + +static int +sig_issuer (const char *option, int argc, char *argv[], void *cookie) +{ + gpg_error_t err; + KEYDB_HANDLE hd; + KEYDB_SEARCH_DESC desc; + struct signinfo *si = cookie; + + if (argc == 0) + log_fatal ("Usage: %s KEYID\n", option); + + if (si->issuer_pk) + log_fatal ("%s: multiple keys provided\n", option); + + err = classify_user_id (argv[0], &desc, 0); + if (err) + log_fatal ("search terms '%s': %s\n", argv[0], gpg_strerror (err)); + + hd = keydb_new (); + + err = keydb_search (hd, &desc, 1, NULL); + if (err) + log_fatal ("looking up '%s': %s\n", argv[0], gpg_strerror (err)); + + err = keydb_get_keyblock (hd, &si->issuer_kb); + if (err) + log_fatal ("retrieving keyblock for '%s': %s\n", + argv[0], gpg_strerror (err)); + + keydb_release (hd); + + si->issuer_pk = si->issuer_kb->pkt->pkt.public_key; + + return 1; +} + +static int +sig_issuer_keyid (const char *option, int argc, char *argv[], void *cookie) +{ + gpg_error_t err; + KEYDB_SEARCH_DESC desc; + struct signinfo *si = cookie; + + if (argc == 0) + log_fatal ("Usage: %s KEYID|self\n", option); + + if (si->issuer_keyid[0] || si->issuer_keyid[1] || si->issuer_keyid_self) + log_fatal ("%s given multiple times.\n", option); + + if (strcasecmp (argv[0], "self") == 0) + { + si->issuer_keyid_self = 1; + return 1; + } + + err = classify_user_id (argv[0], &desc, 0); + if (err) + log_fatal ("search terms '%s': %s\n", argv[0], gpg_strerror (err)); + + if (desc.mode != KEYDB_SEARCH_MODE_LONG_KID) + log_fatal ("%s is not a valid long key id.\n", argv[0]); + + keyid_copy (si->issuer_keyid, desc.u.kid); + + return 1; +} + +static int +sig_pk (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + int i; + char *tail = NULL; + + if (argc == 0) + log_fatal ("Usage: %s COMPONENT_INDEX\n", option); + + errno = 0; + i = strtoul (argv[0], &tail, 10); + if (errno || (tail && *tail)) + log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); + + if (i >= ncomponents) + log_fatal ("%d: No such component (have %d components so far)\n", + i, ncomponents); + if (! (components[i].pkttype == PKT_PUBLIC_KEY + || components[i].pkttype == PKT_PUBLIC_SUBKEY)) + log_fatal ("Component %d is not a public key or a subkey.", i); + + if (strcmp (option, "--pk") == 0) + { + if (si->pk) + log_fatal ("%s already given.\n", option); + si->pk = components[i].pkt.public_key; + } + else if (strcmp (option, "--sk") == 0) + { + if (si->sk) + log_fatal ("%s already given.\n", option); + si->sk = components[i].pkt.public_key; + } + else + log_fatal ("Cannot handle %s\n", option); + + return 1; +} + +static int +sig_user_id (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + int i; + char *tail = NULL; + + if (argc == 0) + log_fatal ("Usage: %s COMPONENT_INDEX\n", option); + if (si->uid) + log_fatal ("%s already given.\n", option); + + errno = 0; + i = strtoul (argv[0], &tail, 10); + if (errno || (tail && *tail)) + log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); + + if (i >= ncomponents) + log_fatal ("%d: No such component (have %d components so far)\n", + i, ncomponents); + if (! (components[i].pkttype != PKT_USER_ID + || components[i].pkttype == PKT_ATTRIBUTE)) + log_fatal ("Component %d is not a public key or a subkey.", i); + + si->uid = components[i].pkt.user_id; + + return 1; +} + +static int +sig_class (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + int i; + char *tail = NULL; + + if (argc == 0) + log_fatal ("Usage: %s CLASS\n", option); + + errno = 0; + i = strtoul (argv[0], &tail, 0); + if (errno || (tail && *tail)) + log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); + + si->class = i; + + return 1; +} + +static int +sig_digest (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + int i; + char *tail = NULL; + + if (argc == 0) + log_fatal ("Usage: %s DIGEST_ALGO\n", option); + + errno = 0; + i = strtoul (argv[0], &tail, 10); + if (errno || (tail && *tail)) + log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); + + si->digest_algo = i; + + return 1; +} + +static int +sig_timestamp (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + char *tail = NULL; + + if (argc == 0) + log_fatal ("Usage: %s TIMESTAMP\n", option); + + errno = 0; + si->timestamp = parse_timestamp (argv[0], &tail); + if (errno || (tail && *tail)) + log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); + + return 1; +} + +static int +sig_expiration (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + int is_expiration = strcmp (option, "--expiration") == 0; + u32 *i = is_expiration ? &si->expiration : &si->key_expiration; + + if (! is_expiration) + log_assert (strcmp (option, "--key-expiration") == 0); + + if (argc == 0) + log_fatal ("Usage: %s DURATION\n", option); + + *i = parse_expire_string (argv[0]); + if (*i == (u32)-1) + log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); + + return 1; +} + +static int +sig_int_list (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + int nvalues = 1; + char *values = xmalloc (nvalues * sizeof (values[0])); + char *tail = argv[0]; + int i; + byte **a; + int *n; + + if (argc == 0) + log_fatal ("Usage: %s VALUE[,VALUE...]\n", option); + + for (i = 0; tail && *tail; i ++) + { + int v; + char *old_tail = tail; + + errno = 0; + v = strtol (tail, &tail, 0); + if (errno || old_tail == tail || (tail && !(*tail == ',' || *tail == 0))) + log_fatal ("Invalid value passed to %s (%s). " + "Expected a list of comma separated numbers\n", + option, argv[0]); + + if (! (0 <= v && v <= 255)) + log_fatal ("%s: %d is out of range (Expected: 0-255)\n", option, v); + + if (i == nvalues) + { + nvalues *= 2; + values = xrealloc (values, nvalues * sizeof (values[0])); + } + + values[i] = v; + + if (*tail == ',') + tail ++; + else + log_assert (*tail == 0); + } + + if (strcmp ("--cipher-algos", option) == 0) + { + a = &si->cipher_algorithms; + n = &si->cipher_algorithms_len; + } + else if (strcmp ("--digest-algos", option) == 0) + { + a = &si->digest_algorithms; + n = &si->digest_algorithms_len; + } + else if (strcmp ("--compress-algos", option) == 0) + { + a = &si->compress_algorithms; + n = &si->compress_algorithms_len; + } + else + log_fatal ("Cannot handle %s\n", option); + + if (*a) + log_fatal ("Option %s given multiple times.\n", option); + + *a = values; + *n = i; + + return 1; +} + +static int +sig_flag (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + int range[2] = {0, 255}; + char *tail; + int v; + + if (strcmp (option, "--primary-user-id") == 0) + range[1] = 1; + + if (argc <= 1) + { + if (range[0] == 0 && range[1] == 1) + log_fatal ("Usage: %s 0|1\n", option); + else + log_fatal ("Usage: %s %d-%d\n", option, range[0], range[1]); + } + + errno = 0; + v = strtol (argv[0], &tail, 0); + if (errno || (tail && *tail) || !(range[0] <= v && v <= range[1])) + log_fatal ("Invalid value passed to %s (%s). Expected %d-%d\n", + option, argv[0], range[0], range[1]); + + if (strcmp (option, "--exportable") == 0) + { + si->exportable_set = 1; + si->exportable = v; + } + else if (strcmp (option, "--revocable") == 0) + { + si->revocable_set = 1; + si->revocable = v; + } + else if (strcmp (option, "--primary-user-id") == 0) + { + si->primary_user_id_set = 1; + si->primary_user_id = v; + } + else + log_fatal ("Cannot handle %s\n", option); + + return 1; +} + +static int +sig_trust_level (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + int i; + char *tail; + + if (argc <= 1) + log_fatal ("Usage: %s DEPTH TRUST_AMOUNT\n", option); + + for (i = 0; i < sizeof (si->trust_args) / sizeof (si->trust_args[0]); i ++) + { + int v; + + errno = 0; + v = strtol (argv[i], &tail, 0); + if (errno || (tail && *tail) || !(0 <= v && v <= 255)) + log_fatal ("Invalid value passed to %s (%s). Expected 0-255\n", + option, argv[i]); + + si->trust_args[i] = v; + } + + si->trust_level_set = 1; + + return 2; +} + +static int +sig_string_arg (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + char *p = argv[0]; + char **s; + + if (argc == 0) + log_fatal ("Usage: %s STRING\n", option); + + if (strcmp (option, "--trust-scope") == 0) + s = &si->trust_scope; + else if (strcmp (option, "--key-server") == 0) + s = &si->key_server; + else if (strcmp (option, "--signers-user-id") == 0) + s = &si->signers_user_id; + else if (strcmp (option, "--policy-uri") == 0) + s = &si->policy_uri; + else + log_fatal ("Cannot handle %s\n", option); + + if (*s) + log_fatal ("%s already given.\n", option); + + *s = xstrdup (p); + + return 1; +} + +static int +sig_revocation_key (const char *option, int argc, char *argv[], void *cookie) +{ + gpg_error_t err; + struct signinfo *si = cookie; + int v; + char *tail; + PKT_public_key pk; + struct revocation_key *revkey; + + if (argc < 2) + log_fatal ("Usage: %s CLASS KEYID\n", option); + + memset (&pk, 0, sizeof (pk)); + + errno = 0; + v = strtol (argv[0], &tail, 16); + if (errno || (tail && *tail) || !(0 <= v && v <= 255)) + log_fatal ("%s: Invalid class value (%s). Expected 0-255\n", + option, argv[0]); + + pk.req_usage = PUBKEY_USAGE_SIG; + err = get_pubkey_byname (NULL, GET_PUBKEY_NO_AKL, + NULL, &pk, argv[1], NULL, NULL, 1); + if (err) + log_fatal ("looking up key %s: %s\n", argv[1], gpg_strerror (err)); + + si->nrevocation_keys ++; + si->revocation_key = xrealloc (si->revocation_key, + si->nrevocation_keys + * sizeof (*si->revocation_key)); + revkey = &si->revocation_key[si->nrevocation_keys - 1]; + + revkey->class = v; + revkey->algid = pk.pubkey_algo; + fingerprint_from_pk (&pk, revkey->fpr, NULL); + + release_public_key_parts (&pk); + + return 2; +} + +static int +sig_notation (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + int is_blob = strcmp (option, "--notation") != 0; + struct notation *notation; + char *p = argv[0]; + int p_free = 0; + char *data; + int data_size; + int data_len; + + if (argc == 0) + log_fatal ("Usage: %s [!<]name=value\n", option); + + if ((p[0] == '!' && p[1] == '<') || p[0] == '<') + /* Read from a file. */ + { + char *filename = NULL; + iobuf_t in; + int prefix; + + if (p[0] == '<') + p ++; + else + { + /* Remove the '<', which string_to_notation does not + understand, and preserve the '!'. */ + p = xstrdup (&p[1]); + p_free = 1; + p[0] = '!'; + } + + filename = strchr (p, '='); + if (! filename) + log_fatal ("No value specified. Usage: %s [!<]name=value\n", + option); + filename ++; + + prefix = (size_t) filename - (size_t) p; + + errno = 0; + in = iobuf_open (filename); + if (! in) + log_fatal ("Opening '%s': %s\n", + filename, errno ? strerror (errno): "unknown error"); + + /* A notation can be at most about a few dozen bytes short of + 64k. Since this is relatively small, we just allocate that + much instead of trying to dynamically size a buffer. */ + data_size = 64 * 1024; + data = xmalloc (data_size); + log_assert (prefix <= data_size); + memcpy (data, p, prefix); + + data_len = iobuf_read (in, &data[prefix], data_size - prefix - 1); + if (data_len == -1) + /* EOF => 0 bytes read. */ + data_len = 0; + + if (data_len == data_size - prefix - 1) + /* Technically, we should do another read and check for EOF, + but what's one byte more or less? */ + log_fatal ("Notation data doesn't fit in the packet.\n"); + + iobuf_close (in); + + /* NUL terminate it. */ + data[prefix + data_len] = 0; + + if (p_free) + xfree (p); + p = data; + p_free = 1; + data = &p[prefix]; + + if (is_blob) + p[prefix - 1] = 0; + } + else if (is_blob) + { + data = strchr (p, '='); + if (! data) + { + data = p; + data_len = 0; + } + else + { + p = xstrdup (p); + p_free = 1; + + data = strchr (p, '='); + log_assert (data); + + /* NUL terminate the name. */ + *data = 0; + data ++; + data_len = strlen (data); + } + } + + if (is_blob) + notation = blob_to_notation (p, data, data_len); + else + notation = string_to_notation (p, 1); + if (! notation) + log_fatal ("creating notation: an unknown error occurred.\n"); + notation->next = si->notations; + si->notations = notation; + + if (p_free) + xfree (p); + + return 1; +} + +static int +sig_big_endian_arg (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + char *p = argv[0]; + int i; + int l; + char *bytes; + + if (argc == 0) + log_fatal ("Usage: %s HEXDIGITS\n", option); + + /* Skip a leading "0x". */ + if (p[0] == '0' && p[1] == 'x') + p += 2; + + for (i = 0; i < strlen (p); i ++) + if (!hexdigitp (&p[i])) + log_fatal ("%s: argument ('%s') must consist of hex digits.\n", + option, p); + if (strlen (p) % 2 != 0) + log_fatal ("%s: argument ('%s') must contain an even number of hex digits.\n", + option, p); + + l = strlen (p) / 2; + bytes = xmalloc (l); + hex2bin (p, bytes, l); + + if (strcmp (option, "--key-server-preferences") == 0) + { + if (si->key_server_preferences) + log_fatal ("%s given multiple times.\n", option); + si->key_server_preferences = bytes; + si->key_server_preferences_len = l; + } + else if (strcmp (option, "--key-flags") == 0) + { + if (si->key_flags) + log_fatal ("%s given multiple times.\n", option); + si->key_flags = bytes; + si->key_flags_len = l; + } + else if (strcmp (option, "--features") == 0) + { + if (si->features) + log_fatal ("%s given multiple times.\n", option); + si->features = bytes; + si->features_len = l; + } + else + log_fatal ("Cannot handle %s\n", option); + + return 1; +} + +static int +sig_reason_for_revocation (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + int v; + char *tail; + + if (argc < 2) + log_fatal ("Usage: %s REASON_CODE REASON_STRING\n", option); + + errno = 0; + v = strtol (argv[0], &tail, 16); + if (errno || (tail && *tail) || !(0 <= v && v <= 255)) + log_fatal ("%s: Invalid reason code (%s). Expected 0-255\n", + option, argv[0]); + + if (si->reason_for_revocation) + log_fatal ("%s given multiple times.\n", option); + + si->reason_for_revocation_code = v; + si->reason_for_revocation = xstrdup (argv[1]); + + return 2; +} + +static int +sig_corrupt (const char *option, int argc, char *argv[], void *cookie) +{ + struct signinfo *si = cookie; + + (void) option; + (void) argc; + (void) argv; + (void) cookie; + + si->corrupt = 1; + + return 0; +} + +static struct option sig_options[] = { + { "--issuer", sig_issuer, + "The key to use to generate the signature."}, + { "--issuer-keyid", sig_issuer_keyid, + "Set the issuer's key id. This is useful for creating a " + "self-signature. As a special case, the value \"self\" refers " + "to the primary key's key id. " + "(RFC 4880, Section 5.2.3.5)" }, + { "--pk", sig_pk, + "The primary keyas an index into the components (keys and uids) " + "created so far where the first component has the index 0." }, + { "--sk", sig_pk, + "The subkey as an index into the components (keys and uids) created " + "so far where the first component has the index 0. Only needed for " + "0x18, 0x19, and 0x28 signatures." }, + { "--user-id", sig_user_id, + "The user id as an index into the components (keys and uids) created " + "so far where the first component has the index 0. Only needed for " + "0x10-0x13 and 0x30 signatures." }, + { "--class", sig_class, + "The signature's class. Valid values are " + "0x10-0x13 (user id and primary-key certification), " + "0x18 (subkey binding), " + "0x19 (primary key binding), " + "0x1f (direct primary key signature), " + "0x20 (key revocation), " + "0x28 (subkey revocation), and " + "0x30 (certification revocation)." + }, + { "--digest", sig_digest, "The digest algorithm" }, + { "--timestamp", sig_timestamp, + "The signature's creation time. " TIMESTAMP_HELP " 0 means now. " + "(RFC 4880, Section 5.2.3.4)" }, + { "--key-expiration", sig_expiration, + "The number of days until the associated key expires. To specify " + "seconds, prefix the value with \"seconds=\". It is also possible " + "to use 'y', 'm' and 'w' as simple multipliers. For instance, 2y " + "means 2 years, etc. " + "(RFC 4880, Section 5.2.3.6)" }, + { "--cipher-algos", sig_int_list, + "A comma separated list of the preferred cipher algorithms (identified by " + "their number, see RFC 4880, Section 9). " + "(RFC 4880, Section 5.2.3.7)" }, + { "--digest-algos", sig_int_list, + "A comma separated list of the preferred algorithms (identified by " + "their number, see RFC 4880, Section 9). " + "(RFC 4880, Section 5.2.3.8)" }, + { "--compress-algos", sig_int_list, + "A comma separated list of the preferred algorithms (identified by " + "their number, see RFC 4880, Section 9)." + "(RFC 4880, Section 5.2.3.9)" }, + { "--expiration", sig_expiration, + "The number of days until the signature expires. To specify seconds, " + "prefix the value with \"seconds=\". It is also possible to use 'y', " + "'m' and 'w' as simple multipliers. For instance, 2y means 2 years, " + "etc. " + "(RFC 4880, Section 5.2.3.10)" }, + { "--exportable", sig_flag, + "Mark this signature as exportable (1) or local (0). " + "(RFC 4880, Section 5.2.3.11)" }, + { "--revocable", sig_flag, + "Mark this signature as revocable (1, revocations are ignored) " + "or non-revocable (0). " + "(RFC 4880, Section 5.2.3.12)" }, + { "--trust-level", sig_trust_level, + "Set the trust level. This takes two integer arguments (0-255): " + "the trusted-introducer level and the degree of trust. " + "(RFC 4880, Section 5.2.3.13.)" }, + { "--trust-scope", sig_string_arg, + "A regular expression that limits the scope of --trust-level. " + "(RFC 4880, Section 5.2.3.14.)" }, + { "--revocation-key", sig_revocation_key, + "Specify a designated revoker. Takes two arguments: the class " + "(normally 0x80 or 0xC0 (sensitive)) and the key id of the " + "designatured revoker. May be given multiple times. " + "(RFC 4880, Section 5.2.3.15)" }, + { "--notation", sig_notation, + "Add a human-readable notation of the form \"[!<]name=value\" where " + "\"!\" means that the critical flag should be set and \"<\" means " + "that VALUE is a file to read the data from. " + "(RFC 4880, Section 5.2.3.16)" }, + { "--notation-binary", sig_notation, + "Add a binary notation of the form \"[!<]name=value\" where " + "\"!\" means that the critical flag should be set and \"<\" means " + "that VALUE is a file to read the data from. " + "(RFC 4880, Section 5.2.3.16)" }, + { "--key-server-preferences", sig_big_endian_arg, + "Big-endian number encoding the keyserver preferences. " + "(RFC 4880, Section 5.2.3.17)" }, + { "--key-server", sig_string_arg, + "The preferred keyserver. (RFC 4880, Section 5.2.3.18)" }, + { "--primary-user-id", sig_flag, + "Sets the primary user id flag. (RFC 4880, Section 5.2.3.19)" }, + { "--policy-uri", sig_string_arg, + "URI of a document that describes the issuer's signing policy. " + "(RFC 4880, Section 5.2.3.20)" }, + { "--key-flags", sig_big_endian_arg, + "Big-endian number encoding the key flags. " + "(RFC 4880, Section 5.2.3.21)" }, + { "--signers-user-id", sig_string_arg, + "The user id (as a string) responsible for the signing. " + "(RFC 4880, Section 5.2.3.22)" }, + { "--reason-for-revocation", sig_reason_for_revocation, + "Takes two arguments: a reason for revocation code and a " + "user-provided string. " + "(RFC 4880, Section 5.2.3.23)" }, + { "--features", sig_big_endian_arg, + "Big-endian number encoding the feature flags. " + "(RFC 4880, Section 5.2.3.24)" }, + { "--signature-target", NULL, + "Takes three arguments: the target signature's public key algorithm " + " (as an integer), the hash algorithm (as an integer) and the hash " + " (as a hexadecimal string). " + "(RFC 4880, Section 5.2.3.25)" }, + { "--embedded-signature", NULL, + "An embedded signature. This must be immediately followed by a " + "signature packet (created using --signature ...) or a filename " + "containing the packet." + "(RFC 4880, Section 5.2.3.26)" }, + { "--hashed", NULL, + "The following attributes will be placed in the hashed area of " + "the signature. (This is the default and it reset at the end of" + "each signature.)" }, + { "--unhashed", NULL, + "The following attributes will be placed in the unhashed area of " + "the signature (and thus not integrity protected)." }, + { "--corrupt", sig_corrupt, + "Corrupt the signature." }, + { NULL, NULL, + "Example:\n\n" + " $ gpgcompose --public-key $KEYID --user-id USERID \\\n" + " --signature --class 0x10 --issuer $KEYID --issuer-keyid self \\\n" + " | " GPG_NAME " --list-packets"} +}; + +static int +mksubpkt_callback (PKT_signature *sig, void *cookie) +{ + struct signinfo *si = cookie; + int i; + + if (si->key_expiration) + { + char buf[4]; + buf[0] = (si->key_expiration >> 24) & 0xff; + buf[1] = (si->key_expiration >> 16) & 0xff; + buf[2] = (si->key_expiration >> 8) & 0xff; + buf[3] = si->key_expiration & 0xff; + build_sig_subpkt (sig, SIGSUBPKT_KEY_EXPIRE, buf, 4); + } + + if (si->cipher_algorithms) + build_sig_subpkt (sig, SIGSUBPKT_PREF_SYM, + si->cipher_algorithms, + si->cipher_algorithms_len); + + if (si->digest_algorithms) + build_sig_subpkt (sig, SIGSUBPKT_PREF_HASH, + si->digest_algorithms, + si->digest_algorithms_len); + + if (si->compress_algorithms) + build_sig_subpkt (sig, SIGSUBPKT_PREF_COMPR, + si->compress_algorithms, + si->compress_algorithms_len); + + if (si->exportable_set) + { + char buf = si->exportable; + build_sig_subpkt (sig, SIGSUBPKT_EXPORTABLE, &buf, 1); + } + + if (si->trust_level_set) + build_sig_subpkt (sig, SIGSUBPKT_TRUST, + si->trust_args, sizeof (si->trust_args)); + + if (si->trust_scope) + build_sig_subpkt (sig, SIGSUBPKT_REGEXP, + si->trust_scope, strlen (si->trust_scope)); + + for (i = 0; i < si->nrevocation_keys; i ++) + { + struct revocation_key *revkey = &si->revocation_key[i]; + gpg_error_t err = keygen_add_revkey (sig, revkey); + if (err) + { + u32 keyid[2]; + keyid_from_fingerprint (global_ctrl, revkey->fpr, 20, keyid); + log_fatal ("adding revocation key %s: %s\n", + keystr (keyid), gpg_strerror (err)); + } + } + + /* keygen_add_revkey sets revocable=0 so be sure to do this after + adding the rev keys. */ + if (si->revocable_set) + { + char buf = si->revocable; + build_sig_subpkt (sig, SIGSUBPKT_REVOCABLE, &buf, 1); + } + + keygen_add_notations (sig, si->notations); + + if (si->key_server_preferences) + build_sig_subpkt (sig, SIGSUBPKT_KS_FLAGS, + si->key_server_preferences, + si->key_server_preferences_len); + + if (si->key_server) + build_sig_subpkt (sig, SIGSUBPKT_PREF_KS, + si->key_server, strlen (si->key_server)); + + if (si->primary_user_id_set) + { + char buf = si->primary_user_id; + build_sig_subpkt (sig, SIGSUBPKT_PRIMARY_UID, &buf, 1); + } + + if (si->policy_uri) + build_sig_subpkt (sig, SIGSUBPKT_POLICY, + si->policy_uri, strlen (si->policy_uri)); + + if (si->key_flags) + build_sig_subpkt (sig, SIGSUBPKT_KEY_FLAGS, + si->key_flags, si->key_flags_len); + + if (si->signers_user_id) + build_sig_subpkt (sig, SIGSUBPKT_SIGNERS_UID, + si->signers_user_id, strlen (si->signers_user_id)); + + if (si->reason_for_revocation) + { + int len = 1 + strlen (si->reason_for_revocation); + char *buf; + + buf = xmalloc (len); + + buf[0] = si->reason_for_revocation_code; + memcpy (&buf[1], si->reason_for_revocation, len - 1); + + build_sig_subpkt (sig, SIGSUBPKT_REVOC_REASON, buf, len); + + xfree (buf); + } + + if (si->features) + build_sig_subpkt (sig, SIGSUBPKT_FEATURES, + si->features, si->features_len); + + return 0; +} + +static int +signature (const char *option, int argc, char *argv[], void *cookie) +{ + gpg_error_t err; + iobuf_t out = cookie; + struct signinfo si; + int processed; + PKT_public_key *pk; + PKT_signature *sig; + PACKET pkt; + u32 keyid_orig[2], keyid[2]; + + (void) option; + + memset (&si, 0, sizeof (si)); + memset (&pkt, 0, sizeof (pkt)); + + processed = process_options (option, + major_options, + sig_options, &si, + global_options, NULL, + argc, argv); + + if (ncomponents) + { + int pkttype = components[ncomponents - 1].pkttype; + + if (pkttype == PKT_PUBLIC_KEY) + { + if (! si.class) + /* Direct key sig. */ + si.class = 0x1F; + } + else if (pkttype == PKT_PUBLIC_SUBKEY) + { + if (! si.sk) + si.sk = components[ncomponents - 1].pkt.public_key; + if (! si.class) + /* Subkey binding sig. */ + si.class = 0x18; + } + else if (pkttype == PKT_USER_ID) + { + if (! si.uid) + si.uid = components[ncomponents - 1].pkt.user_id; + if (! si.class) + /* Certification of a user id and public key packet. */ + si.class = 0x10; + } + } + + pk = NULL; + if (! si.pk || ! si.issuer_pk) + /* No primary key specified. Default to the first one that we + find. */ + { + int i; + for (i = 0; i < ncomponents; i ++) + if (components[i].pkttype == PKT_PUBLIC_KEY) + { + pk = components[i].pkt.public_key; + break; + } + } + + if (! si.pk) + { + if (! pk) + log_fatal ("%s: no primary key given and no primary key available", + "--pk"); + si.pk = pk; + } + if (! si.issuer_pk) + { + if (! pk) + log_fatal ("%s: no issuer key given and no primary key available", + "--issuer"); + si.issuer_pk = pk; + } + + if (si.class == 0x18 || si.class == 0x19 || si.class == 0x28) + /* Requires the primary key and a subkey. */ + { + if (! si.sk) + log_fatal ("sig class 0x%x requires a subkey (--sk)\n", si.class); + } + else if (si.class == 0x10 + || si.class == 0x11 + || si.class == 0x12 + || si.class == 0x13 + || si.class == 0x30) + /* Requires the primary key and a user id. */ + { + if (! si.uid) + log_fatal ("sig class 0x%x requires a uid (--uid)\n", si.class); + } + else if (si.class == 0x1F || si.class == 0x20) + /* Just requires the primary key. */ + ; + else + log_fatal ("Unsupported signature class: 0x%x\n", si.class); + + sig = xmalloc_clear (sizeof (*sig)); + + /* Save SI.ISSUER_PK->KEYID. */ + keyid_copy (keyid_orig, pk_keyid (si.issuer_pk)); + if (si.issuer_keyid[0] || si.issuer_keyid[1]) + keyid_copy (si.issuer_pk->keyid, si.issuer_keyid); + else if (si.issuer_keyid_self) + { + PKT_public_key *pripk = primary_key(); + if (! pripk) + log_fatal ("--issuer-keyid self given, but no primary key available.\n"); + keyid_copy (si.issuer_pk->keyid, pk_keyid (pripk)); + } + + /* Changing the issuer's key id is fragile. Check to make sure + make_keysig_packet didn't recompute the keyid. */ + keyid_copy (keyid, si.issuer_pk->keyid); + err = make_keysig_packet (global_ctrl, + &sig, si.pk, si.uid, si.sk, si.issuer_pk, + si.class, si.digest_algo, + si.timestamp, si.expiration, + mksubpkt_callback, &si, NULL); + log_assert (keyid_cmp (keyid, si.issuer_pk->keyid) == 0); + if (err) + log_fatal ("Generating signature: %s\n", gpg_strerror (err)); + + /* Restore SI.PK->KEYID. */ + keyid_copy (si.issuer_pk->keyid, keyid_orig); + + if (si.corrupt) + { + /* Set the top 32-bits to 0xBAD0DEAD. */ + int bits = gcry_mpi_get_nbits (sig->data[0]); + gcry_mpi_t x = gcry_mpi_new (0); + gcry_mpi_add_ui (x, x, 0xBAD0DEAD); + gcry_mpi_lshift (x, x, bits > 32 ? bits - 32 : bits); + gcry_mpi_clear_highbit (sig->data[0], bits > 32 ? bits - 32 : 0); + gcry_mpi_add (sig->data[0], sig->data[0], x); + gcry_mpi_release (x); + } + + pkt.pkttype = PKT_SIGNATURE; + pkt.pkt.signature = sig; + + err = build_packet (out, &pkt); + if (err) + log_fatal ("serializing public key packet: %s\n", gpg_strerror (err)); + + debug ("Wrote signature packet:\n"); + dump_component (&pkt); + + free_seckey_enc (sig); + release_kbnode (si.issuer_kb); + xfree (si.revocation_key); + + return processed; +} + +struct sk_esk_info +{ + /* The cipher used for encrypting the session key (when a session + key is used). */ + int cipher; + /* The cipher used for encryping the SED packet. */ + int sed_cipher; + + /* S2K related data. */ + int hash; + int mode; + int mode_set; + byte salt[8]; + int salt_set; + int iterations; + + /* If applying the S2K function to the passphrase is the session key + or if it is the decryption key for the session key. */ + int s2k_is_session_key; + /* Generate a new, random session key. */ + int new_session_key; + + /* The unencrypted session key. */ + int session_key_len; + char *session_key; + + char *password; +}; + +static int +sk_esk_cipher (const char *option, int argc, char *argv[], void *cookie) +{ + struct sk_esk_info *si = cookie; + char *usage = "integer|IDEA|3DES|CAST5|BLOWFISH|AES|AES192|AES256|CAMELLIA128|CAMELLIA192|CAMELLIA256"; + int cipher; + + if (argc == 0) + log_fatal ("Usage: %s %s\n", option, usage); + + if (strcasecmp (argv[0], "IDEA") == 0) + cipher = CIPHER_ALGO_IDEA; + else if (strcasecmp (argv[0], "3DES") == 0) + cipher = CIPHER_ALGO_3DES; + else if (strcasecmp (argv[0], "CAST5") == 0) + cipher = CIPHER_ALGO_CAST5; + else if (strcasecmp (argv[0], "BLOWFISH") == 0) + cipher = CIPHER_ALGO_BLOWFISH; + else if (strcasecmp (argv[0], "AES") == 0) + cipher = CIPHER_ALGO_AES; + else if (strcasecmp (argv[0], "AES192") == 0) + cipher = CIPHER_ALGO_AES192; + else if (strcasecmp (argv[0], "TWOFISH") == 0) + cipher = CIPHER_ALGO_TWOFISH; + else if (strcasecmp (argv[0], "CAMELLIA128") == 0) + cipher = CIPHER_ALGO_CAMELLIA128; + else if (strcasecmp (argv[0], "CAMELLIA192") == 0) + cipher = CIPHER_ALGO_CAMELLIA192; + else if (strcasecmp (argv[0], "CAMELLIA256") == 0) + cipher = CIPHER_ALGO_CAMELLIA256; + else + { + char *tail; + int v; + + errno = 0; + v = strtol (argv[0], &tail, 0); + if (errno || (tail && *tail) || ! valid_cipher (v)) + log_fatal ("Invalid or unsupported value. Usage: %s %s\n", + option, usage); + + cipher = v; + } + + if (strcmp (option, "--cipher") == 0) + { + if (si->cipher) + log_fatal ("%s given multiple times.", option); + si->cipher = cipher; + } + else if (strcmp (option, "--sed-cipher") == 0) + { + if (si->sed_cipher) + log_fatal ("%s given multiple times.", option); + si->sed_cipher = cipher; + } + + return 1; +} + +static int +sk_esk_mode (const char *option, int argc, char *argv[], void *cookie) +{ + struct sk_esk_info *si = cookie; + char *usage = "integer|simple|salted|iterated"; + + if (argc == 0) + log_fatal ("Usage: %s %s\n", option, usage); + + if (si->mode) + log_fatal ("%s given multiple times.", option); + + if (strcasecmp (argv[0], "simple") == 0) + si->mode = 0; + else if (strcasecmp (argv[0], "salted") == 0) + si->mode = 1; + else if (strcasecmp (argv[0], "iterated") == 0) + si->mode = 3; + else + { + char *tail; + int v; + + errno = 0; + v = strtol (argv[0], &tail, 0); + if (errno || (tail && *tail) || ! (v == 0 || v == 1 || v == 3)) + log_fatal ("Invalid or unsupported value. Usage: %s %s\n", + option, usage); + + si->mode = v; + } + + si->mode_set = 1; + + return 1; +} + +static int +sk_esk_hash_algorithm (const char *option, int argc, char *argv[], void *cookie) +{ + struct sk_esk_info *si = cookie; + char *usage = "integer|MD5|SHA1|RMD160|SHA256|SHA384|SHA512|SHA224"; + + if (argc == 0) + log_fatal ("Usage: %s %s\n", option, usage); + + if (si->hash) + log_fatal ("%s given multiple times.", option); + + if (strcasecmp (argv[0], "MD5") == 0) + si->hash = DIGEST_ALGO_MD5; + else if (strcasecmp (argv[0], "SHA1") == 0) + si->hash = DIGEST_ALGO_SHA1; + else if (strcasecmp (argv[0], "RMD160") == 0) + si->hash = DIGEST_ALGO_RMD160; + else if (strcasecmp (argv[0], "SHA256") == 0) + si->hash = DIGEST_ALGO_SHA256; + else if (strcasecmp (argv[0], "SHA384") == 0) + si->hash = DIGEST_ALGO_SHA384; + else if (strcasecmp (argv[0], "SHA512") == 0) + si->hash = DIGEST_ALGO_SHA512; + else if (strcasecmp (argv[0], "SHA224") == 0) + si->hash = DIGEST_ALGO_SHA224; + else + { + char *tail; + int v; + + errno = 0; + v = strtol (argv[0], &tail, 0); + if (errno || (tail && *tail) + || ! (v == DIGEST_ALGO_MD5 + || v == DIGEST_ALGO_SHA1 + || v == DIGEST_ALGO_RMD160 + || v == DIGEST_ALGO_SHA256 + || v == DIGEST_ALGO_SHA384 + || v == DIGEST_ALGO_SHA512 + || v == DIGEST_ALGO_SHA224)) + log_fatal ("Invalid or unsupported value. Usage: %s %s\n", + option, usage); + + si->hash = v; + } + + return 1; +} + +static int +sk_esk_salt (const char *option, int argc, char *argv[], void *cookie) +{ + struct sk_esk_info *si = cookie; + char *usage = "16-HEX-CHARACTERS"; + char *p = argv[0]; + + if (argc == 0) + log_fatal ("Usage: %s %s\n", option, usage); + + if (si->salt_set) + log_fatal ("%s given multiple times.", option); + + if (p[0] == '0' && p[1] == 'x') + p += 2; + + if (strlen (p) != 16) + log_fatal ("%s: Salt must be exactly 16 hexadecimal characters (have: %zd)\n", + option, strlen (p)); + + if (hex2bin (p, si->salt, sizeof (si->salt)) == -1) + log_fatal ("%s: Salt must only contain hexadecimal characters\n", + option); + + si->salt_set = 1; + + return 1; +} + +static int +sk_esk_iterations (const char *option, int argc, char *argv[], void *cookie) +{ + struct sk_esk_info *si = cookie; + char *usage = "ITERATION-COUNT"; + char *tail; + int v; + + if (argc == 0) + log_fatal ("Usage: %s %s\n", option, usage); + + errno = 0; + v = strtol (argv[0], &tail, 0); + if (errno || (tail && *tail) || v < 0) + log_fatal ("%s: Non-negative integer expected.\n", option); + + si->iterations = v; + + return 1; +} + +static int +sk_esk_session_key (const char *option, int argc, char *argv[], void *cookie) +{ + struct sk_esk_info *si = cookie; + char *usage = "HEX-CHARACTERS|auto|none"; + char *p = argv[0]; + struct session_key sk; + + if (argc == 0) + log_fatal ("Usage: %s %s\n", option, usage); + + if (si->session_key || si->s2k_is_session_key + || si->new_session_key) + log_fatal ("%s given multiple times.", option); + + if (strcasecmp (p, "none") == 0) + { + si->s2k_is_session_key = 1; + return 1; + } + if (strcasecmp (p, "new") == 0) + { + si->new_session_key = 1; + return 1; + } + if (strcasecmp (p, "auto") == 0) + return 1; + + sk = parse_session_key (option, p, 0); + + if (si->session_key) + log_fatal ("%s given multiple times.", option); + + if (sk.algo) + si->sed_cipher = sk.algo; + + si->session_key_len = sk.keylen; + si->session_key = sk.key; + + return 1; +} + +static int +sk_esk_password (const char *option, int argc, char *argv[], void *cookie) +{ + struct sk_esk_info *si = cookie; + char *usage = "PASSWORD"; + + if (argc == 0) + log_fatal ("Usage: --sk-esk %s\n", usage); + + if (si->password) + log_fatal ("%s given multiple times.", option); + + si->password = xstrdup (argv[0]); + + return 1; +} + +static struct option sk_esk_options[] = { + { "--cipher", sk_esk_cipher, + "The encryption algorithm for encrypting the session key. " + "One of IDEA, 3DES, CAST5, BLOWFISH, AES (default), AES192, " + "AES256, TWOFISH, CAMELLIA128, CAMELLIA192, or CAMELLIA256." }, + { "--sed-cipher", sk_esk_cipher, + "The encryption algorithm for encrypting the SED packet. " + "One of IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, " + "AES256 (default), TWOFISH, CAMELLIA128, CAMELLIA192, or CAMELLIA256." }, + { "--mode", sk_esk_mode, + "The S2K mode. Either one of the strings \"simple\", \"salted\" " + "or \"iterated\" or an integer." }, + { "--hash", sk_esk_hash_algorithm, + "The hash algorithm to used to derive the key. One of " + "MD5, SHA1 (default), RMD160, SHA256, SHA384, SHA512, or SHA224." }, + { "--salt", sk_esk_salt, + "The S2K salt encoded as 16 hexadecimal characters. One needed " + "if the S2K function is in salted or iterated mode." }, + { "--iterations", sk_esk_iterations, + "The iteration count. If not provided, a reasonable value is chosen. " + "Note: due to the encoding scheme, not every value is valid. For " + "convenience, the provided value will be rounded appropriately. " + "Only needed if the S2K function is in iterated mode." }, + { "--session-key", sk_esk_session_key, + "The session key to be encrypted by the S2K function as a hexadecimal " + "string. If this is \"new\", then a new session key is generated." + "If this is \"auto\", then either the last session key is " + "used, if the was none, one is generated. If this is \"none\", then " + "the session key is the result of applying the S2K algorithms to the " + "password. The session key may be prefaced with an integer and a colon " + "to indicate the cipher to use for the SED packet (making --sed-cipher " + "unnecessary and allowing the direct use of the result of " + "\"" GPG_NAME " --show-session-key\")." }, + { "", sk_esk_password, "The password." }, + { NULL, NULL, + "Example:\n\n" + " $ gpgcompose --sk-esk foobar --encrypted \\\n" + " --literal --value foo | " GPG_NAME " --list-packets" } +}; + +static int +sk_esk (const char *option, int argc, char *argv[], void *cookie) +{ + iobuf_t out = cookie; + gpg_error_t err; + int processed; + struct sk_esk_info si; + DEK sesdek; + DEK s2kdek; + PKT_symkey_enc *ske; + PACKET pkt; + + memset (&si, 0, sizeof (si)); + + processed = process_options (option, + major_options, + sk_esk_options, &si, + global_options, NULL, + argc, argv); + + if (! si.password) + log_fatal ("%s: missing password. Usage: %s PASSWORD", option, option); + + /* Fill in defaults, if appropriate. */ + if (! si.cipher) + si.cipher = CIPHER_ALGO_AES; + + if (! si.sed_cipher) + si.sed_cipher = CIPHER_ALGO_AES256; + + if (! si.hash) + si.hash = DIGEST_ALGO_SHA1; + + if (! si.mode_set) + /* Salted and iterated. */ + si.mode = 3; + + if (si.mode != 0 && ! si.salt_set) + /* Generate a salt. */ + gcry_randomize (si.salt, 8, GCRY_STRONG_RANDOM); + + if (si.mode == 0) + { + if (si.iterations) + log_info ("%s: --iterations provided, but not used for mode=0\n", + option); + si.iterations = 0; + } + else if (! si.iterations) + si.iterations = 10000; + + memset (&sesdek, 0, sizeof (sesdek)); + /* The session key is used to encrypt the SED packet. */ + sesdek.algo = si.sed_cipher; + if (si.session_key) + /* Copy the unencrypted session key into SESDEK. */ + { + sesdek.keylen = openpgp_cipher_get_algo_keylen (sesdek.algo); + if (sesdek.keylen != si.session_key_len) + log_fatal ("%s: Cipher algorithm requires a %d byte session key, but provided session key is %d bytes.", + option, sesdek.keylen, si.session_key_len); + + log_assert (sesdek.keylen <= sizeof (sesdek.key)); + memcpy (sesdek.key, si.session_key, sesdek.keylen); + } + else if (! si.s2k_is_session_key || si.new_session_key) + /* We need a session key, but one wasn't provided. Generate it. */ + make_session_key (&sesdek); + + /* The encrypted session key needs 1 + SESDEK.KEYLEN bytes of + space. */ + ske = xmalloc_clear (sizeof (*ske) + sesdek.keylen); + + ske->version = 4; + ske->cipher_algo = si.cipher; + + ske->s2k.mode = si.mode; + ske->s2k.hash_algo = si.hash; + log_assert (sizeof (si.salt) == sizeof (ske->s2k.salt)); + memcpy (ske->s2k.salt, si.salt, sizeof (ske->s2k.salt)); + if (! si.s2k_is_session_key) + /* 0 means get the default. */ + ske->s2k.count = encode_s2k_iterations (si.iterations); + + + /* Derive the symmetric key that is either the session key or the + key used to encrypt the session key. */ + memset (&s2kdek, 0, sizeof (s2kdek)); + + s2kdek.algo = si.cipher; + s2kdek.keylen = openpgp_cipher_get_algo_keylen (s2kdek.algo); + + err = gcry_kdf_derive (si.password, strlen (si.password), + ske->s2k.mode == 3 ? GCRY_KDF_ITERSALTED_S2K + : ske->s2k.mode == 1 ? GCRY_KDF_SALTED_S2K + : GCRY_KDF_SIMPLE_S2K, + ske->s2k.hash_algo, ske->s2k.salt, 8, + S2K_DECODE_COUNT (ske->s2k.count), + /* The size of the desired key and its + buffer. */ + s2kdek.keylen, s2kdek.key); + if (err) + log_fatal ("gcry_kdf_derive failed: %s", gpg_strerror (err)); + + + if (si.s2k_is_session_key) + { + ske->seskeylen = 0; + session_key = s2kdek; + } + else + /* Encrypt the session key using the s2k specifier. */ + { + DEK *sesdekp = &sesdek; + + /* Now encrypt the session key (or rather, the algorithm used to + encrypt the SED plus the session key) using ENCKEY. */ + ske->seskeylen = 1 + sesdek.keylen; + encrypt_seskey (&s2kdek, &sesdekp, ske->seskey); + + /* Save the session key for later. */ + session_key = sesdek; + } + + pkt.pkttype = PKT_SYMKEY_ENC; + pkt.pkt.symkey_enc = ske; + + err = build_packet (out, &pkt); + if (err) + log_fatal ("Serializing sym-key encrypted packet: %s\n", + gpg_strerror (err)); + + debug ("Wrote sym-key encrypted packet:\n"); + dump_component (&pkt); + + xfree (si.session_key); + xfree (si.password); + xfree (ske); + + return processed; +} + +struct pk_esk_info +{ + int session_key_set; + + int new_session_key; + + int sed_cipher; + int session_key_len; + char *session_key; + + int throw_keyid; + + char *keyid; +}; + +static int +pk_esk_session_key (const char *option, int argc, char *argv[], void *cookie) +{ + struct pk_esk_info *pi = cookie; + char *usage = "HEX-CHARACTERS|auto|none"; + char *p = argv[0]; + struct session_key sk; + + if (argc == 0) + log_fatal ("Usage: %s %s\n", option, usage); + + if (pi->session_key_set) + log_fatal ("%s given multiple times.", option); + pi->session_key_set = 1; + + if (strcasecmp (p, "new") == 0) + { + pi->new_session_key = 1; + return 1; + } + + if (strcasecmp (p, "auto") == 0) + return 1; + + sk = parse_session_key (option, p, 0); + + if (pi->session_key) + log_fatal ("%s given multiple times.", option); + + if (sk.algo) + pi->sed_cipher = sk.algo; + + pi->session_key_len = sk.keylen; + pi->session_key = sk.key; + + return 1; +} + +static int +pk_esk_throw_keyid (const char *option, int argc, char *argv[], void *cookie) +{ + struct pk_esk_info *pi = cookie; + + (void) option; + (void) argc; + (void) argv; + + pi->throw_keyid = 1; + + return 0; +} + +static int +pk_esk_keyid (const char *option, int argc, char *argv[], void *cookie) +{ + struct pk_esk_info *pi = cookie; + char *usage = "KEYID"; + + if (argc == 0) + log_fatal ("Usage: %s %s\n", option, usage); + + if (pi->keyid) + log_fatal ("Multiple key ids given, but only one is allowed."); + + pi->keyid = xstrdup (argv[0]); + + return 1; +} + +static struct option pk_esk_options[] = { + { "--session-key", pk_esk_session_key, + "The session key to be encrypted by the S2K function as a hexadecimal " + "string. If this is not given or is \"auto\", then the current " + "session key is used. If there is no session key or this is \"new\", " + "then a new session key is generated. The session key may be " + "prefaced with an integer and a colon to indicate the cipher to use " + "for the SED packet (making --sed-cipher unnecessary and allowing the " + "direct use of the result of \"" GPG_NAME " --show-session-key\")." }, + { "--throw-keyid", pk_esk_throw_keyid, + "Throw the keyid." }, + { "", pk_esk_keyid, "The key id." }, + { NULL, NULL, + "Example:\n\n" + " $ gpgcompose --pk-esk $KEYID --encrypted --literal --value foo \\\n" + " | " GPG_NAME " --list-packets"} +}; + +static int +pk_esk (const char *option, int argc, char *argv[], void *cookie) +{ + iobuf_t out = cookie; + gpg_error_t err; + int processed; + struct pk_esk_info pi; + PKT_public_key pk; + + memset (&pi, 0, sizeof (pi)); + + processed = process_options (option, + major_options, + pk_esk_options, &pi, + global_options, NULL, + argc, argv); + + if (! pi.keyid) + log_fatal ("%s: missing keyid. Usage: %s KEYID", option, option); + + memset (&pk, 0, sizeof (pk)); + pk.req_usage = PUBKEY_USAGE_ENC; + err = get_pubkey_byname (NULL, GET_PUBKEY_NO_AKL, + NULL, &pk, pi.keyid, NULL, NULL, 1); + if (err) + log_fatal ("%s: looking up key %s: %s\n", + option, pi.keyid, gpg_strerror (err)); + + if (pi.sed_cipher) + /* Have a session key. */ + { + session_key.algo = pi.sed_cipher; + session_key.keylen = pi.session_key_len; + log_assert (session_key.keylen <= sizeof (session_key.key)); + memcpy (session_key.key, pi.session_key, session_key.keylen); + } + + if (pi.new_session_key || ! session_key.algo) + { + if (! pi.new_session_key) + /* Default to AES256. */ + session_key.algo = CIPHER_ALGO_AES256; + make_session_key (&session_key); + } + + err = write_pubkey_enc (global_ctrl, &pk, pi.throw_keyid, &session_key, out); + if (err) + log_fatal ("%s: writing pk_esk packet for %s: %s\n", + option, pi.keyid, gpg_strerror (err)); + + debug ("Wrote pk_esk packet for %s\n", pi.keyid); + + xfree (pi.keyid); + xfree (pi.session_key); + + return processed; +} + +struct encinfo +{ + int saw_session_key; +}; + +static int +encrypted_session_key (const char *option, int argc, char *argv[], void *cookie) +{ + struct encinfo *ei = cookie; + char *usage = "HEX-CHARACTERS|auto"; + char *p = argv[0]; + struct session_key sk; + + if (argc == 0) + log_fatal ("Usage: %s %s\n", option, usage); + + if (ei->saw_session_key) + log_fatal ("%s given multiple times.", option); + ei->saw_session_key = 1; + + if (strcasecmp (p, "auto") == 0) + return 1; + + sk = parse_session_key (option, p, 1); + + session_key.algo = sk.algo; + log_assert (sk.keylen <= sizeof (session_key.key)); + memcpy (session_key.key, sk.key, sk.keylen); + xfree (sk.key); + + return 1; +} + +static struct option encrypted_options[] = { + { "--session-key", encrypted_session_key, + "The session key to be encrypted by the S2K function as a hexadecimal " + "string. If this is not given or is \"auto\", then the last session key " + "is used. If there was none, then an error is raised. The session key " + "must be prefaced with an integer and a colon to indicate the cipher " + "to use (this is format used by \"" GPG_NAME " --show-session-key\")." }, + { NULL, NULL, + "After creating the packet, this command clears the current " + "session key.\n\n" + "Example: nested encryption packets:\n\n" + " $ gpgcompose --sk-esk foo --encrypted-mdc \\\n" + " --sk-esk bar --encrypted-mdc \\\n" + " --literal --value 123 --encrypted-pop --encrypted-pop | " GPG_NAME" -d" } +}; + +static int +encrypted (const char *option, int argc, char *argv[], void *cookie) +{ + iobuf_t out = cookie; + int processed; + struct encinfo ei; + PKT_encrypted e; + cipher_filter_context_t *cfx; + + memset (&ei, 0, sizeof (ei)); + + processed = process_options (option, + major_options, + encrypted_options, &ei, + global_options, NULL, + argc, argv); + + if (! session_key.algo) + log_fatal ("%s: no session key configured\n" + " (use e.g. --sk-esk PASSWORD or --pk-esk KEYID).\n", + option); + + memset (&e, 0, sizeof (e)); + /* We only need to set E->LEN, E->EXTRALEN (if E->LEN is not + 0), and E->NEW_CTB. */ + e.len = 0; + e.new_ctb = 1; + + /* Register the cipher filter. */ + + cfx = xmalloc_clear (sizeof (*cfx)); + + /* Copy the session key. */ + cfx->dek = xmalloc (sizeof (*cfx->dek)); + *cfx->dek = session_key; + + if (do_debug) + { + char *buf; + + buf = xmalloc (2 * session_key.keylen + 1); + debug ("session key: algo: %d; keylen: %d; key: %s\n", + session_key.algo, session_key.keylen, + bin2hex (session_key.key, session_key.keylen, buf)); + xfree (buf); + } + + if (strcmp (option, "--encrypted-mdc") == 0) + cfx->dek->use_mdc = 1; + else if (strcmp (option, "--encrypted") == 0) + cfx->dek->use_mdc = 0; + else + log_fatal ("%s: option not handled by this function!\n", option); + + cfx->datalen = 0; + + filter_push (out, cipher_filter_cfb, cfx, PKT_ENCRYPTED, cfx->datalen == 0); + + debug ("Wrote encrypted packet:\n"); + + /* Clear the current session key. */ + memset (&session_key, 0, sizeof (session_key)); + + return processed; +} + +static struct option encrypted_pop_options[] = { + { NULL, NULL, + "Example:\n\n" + " $ gpgcompose --sk-esk PASSWORD \\\n" + " --encrypted-mdc \\\n" + " --literal --value foo \\\n" + " --encrypted-pop | " GPG_NAME " --list-packets" } +}; + +static int +encrypted_pop (const char *option, int argc, char *argv[], void *cookie) +{ + iobuf_t out = cookie; + int processed; + + processed = process_options (option, + major_options, + encrypted_pop_options, + NULL, + global_options, NULL, + argc, argv); + /* We only support a single option, --help, which causes the program + * to exit. */ + log_assert (processed == 0); + + filter_pop (out, PKT_ENCRYPTED); + + debug ("Popped encryption container.\n"); + + return processed; +} + +struct data +{ + int file; + union + { + char *data; + char *filename; + }; + struct data *next; +}; + +/* This must be the first member of the struct to be able to use + add_value! */ +struct datahead +{ + struct data *head; + struct data **last_next; +}; + +static int +add_value (const char *option, int argc, char *argv[], void *cookie) +{ + struct datahead *dh = cookie; + struct data *d = xmalloc_clear (sizeof (struct data)); + + d->file = strcmp ("--file", option) == 0; + if (! d->file) + log_assert (strcmp ("--value", option) == 0); + + if (argc == 0) + { + if (d->file) + log_fatal ("Usage: %s FILENAME\n", option); + else + log_fatal ("Usage: %s STRING\n", option); + } + + if (! dh->last_next) + /* First time through. Initialize DH->LAST_NEXT. */ + { + log_assert (! dh->head); + dh->last_next = &dh->head; + } + + if (d->file) + d->filename = argv[0]; + else + d->data = argv[0]; + + /* Append it. */ + *dh->last_next = d; + dh->last_next = &d->next; + + return 1; +} + +struct litinfo +{ + /* This must be the first element for add_value to work! */ + struct datahead data; + + int timestamp_set; + u32 timestamp; + char mode; + int partial_body_length_encoding; + char *name; +}; + +static int +literal_timestamp (const char *option, int argc, char *argv[], void *cookie) +{ + struct litinfo *li = cookie; + + char *tail = NULL; + + if (argc == 0) + log_fatal ("Usage: %s TIMESTAMP\n", option); + + errno = 0; + li->timestamp = parse_timestamp (argv[0], &tail); + if (errno || (tail && *tail)) + log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); + li->timestamp_set = 1; + + return 1; +} + +static int +literal_mode (const char *option, int argc, char *argv[], void *cookie) +{ + struct litinfo *li = cookie; + + if (argc == 0 + || ! (strcmp (argv[0], "b") == 0 + || strcmp (argv[0], "t") == 0 + || strcmp (argv[0], "u") == 0)) + log_fatal ("Usage: %s [btu]\n", option); + + li->mode = argv[0][0]; + + return 1; +} + +static int +literal_partial_body_length (const char *option, int argc, char *argv[], + void *cookie) +{ + struct litinfo *li = cookie; + char *tail; + int v; + int range[2] = {0, 1}; + + if (argc <= 1) + log_fatal ("Usage: %s [0|1]\n", option); + + errno = 0; + v = strtol (argv[0], &tail, 0); + if (errno || (tail && *tail) || !(range[0] <= v && v <= range[1])) + log_fatal ("Invalid value passed to %s (%s). Expected %d-%d\n", + option, argv[0], range[0], range[1]); + + li->partial_body_length_encoding = v; + + return 1; +} + +static int +literal_name (const char *option, int argc, char *argv[], void *cookie) +{ + struct litinfo *li = cookie; + + if (argc <= 0) + log_fatal ("Usage: %s NAME\n", option); + + if (strlen (argv[0]) > 255) + log_fatal ("%s: name is too long (%zd > 255 characters).\n", + option, strlen (argv[0])); + + li->name = argv[0]; + + return 1; +} + +static struct option literal_options[] = { + { "--value", add_value, + "A string to store in the literal packet." }, + { "--file", add_value, + "A file to copy into the literal packet." }, + { "--timestamp", literal_timestamp, + "The literal packet's time stamp. This defaults to the current time." }, + { "--mode", literal_mode, + "The content's mode (normally 'b' (default), 't' or 'u')." }, + { "--partial-body-length", literal_partial_body_length, + "Force partial body length encoding." }, + { "--name", literal_name, + "The literal's name." }, + { NULL, NULL, + "Example:\n\n" + " $ gpgcompose --literal --value foobar | " GPG_NAME " -d"} +}; + +static int +literal (const char *option, int argc, char *argv[], void *cookie) +{ + iobuf_t out = cookie; + gpg_error_t err; + int processed; + struct litinfo li; + PKT_plaintext *pt; + PACKET pkt; + struct data *data; + + memset (&li, 0, sizeof (li)); + + processed = process_options (option, + major_options, + literal_options, &li, + global_options, NULL, + argc, argv); + + if (! li.data.head) + log_fatal ("%s: no data provided (use --value or --file)", option); + + pt = xmalloc_clear (sizeof (*pt) + (li.name ? strlen (li.name) : 0)); + pt->new_ctb = 1; + + if (li.timestamp_set) + pt->timestamp = li.timestamp; + else + /* Default to the current time. */ + pt->timestamp = make_timestamp (); + + pt->mode = li.mode; + if (! pt->mode) + /* Default to binary. */ + pt->mode = 'b'; + + if (li.name) + { + strcpy (pt->name, li.name); + pt->namelen = strlen (pt->name); + } + + pkt.pkttype = PKT_PLAINTEXT; + pkt.pkt.plaintext = pt; + + if (! li.partial_body_length_encoding) + /* Compute the amount of data. */ + { + pt->len = 0; + for (data = li.data.head; data; data = data->next) + { + if (data->file) + { + iobuf_t in; + int overflow; + off_t off; + + in = iobuf_open (data->filename); + if (! in) + /* An error opening the file. We do error handling + below so just break here. */ + { + pt->len = 0; + break; + } + + off = iobuf_get_filelength (in, &overflow); + iobuf_close (in); + + if (overflow || off == 0) + /* Length is unknown or there was an error + (unfortunately, iobuf_get_filelength doesn't + distinguish between 0 length files and an error!). + Fall back to partial body mode. */ + { + pt->len = 0; + break; + } + + pt->len += off; + } + else + pt->len += strlen (data->data); + } + } + + err = build_packet (out, &pkt); + if (err) + log_fatal ("Serializing literal packet: %s\n", gpg_strerror (err)); + + /* Write out the data. */ + for (data = li.data.head; data; data = data->next) + { + if (data->file) + { + iobuf_t in; + errno = 0; + in = iobuf_open (data->filename); + if (! in) + log_fatal ("Opening '%s': %s\n", + data->filename, + errno ? strerror (errno): "unknown error"); + + iobuf_copy (out, in); + if (iobuf_error (in)) + log_fatal ("Reading from %s: %s\n", + data->filename, + gpg_strerror (iobuf_error (in))); + if (iobuf_error (out)) + log_fatal ("Writing literal data from %s: %s\n", + data->filename, + gpg_strerror (iobuf_error (out))); + + iobuf_close (in); + } + else + { + err = iobuf_write (out, data->data, strlen (data->data)); + if (err) + log_fatal ("Writing literal data: %s\n", gpg_strerror (err)); + } + } + + if (! pt->len) + { + /* Disable partial body length mode. */ + log_assert (pt->new_ctb == 1); + iobuf_set_partial_body_length_mode (out, 0); + } + + debug ("Wrote literal packet:\n"); + dump_component (&pkt); + + while (li.data.head) + { + data = li.data.head->next; + xfree (li.data.head); + li.data.head = data; + } + xfree (pt); + + return processed; +} + +static int +copy_file (const char *option, int argc, char *argv[], void *cookie) +{ + char **filep = cookie; + + if (argc == 0) + log_fatal ("Usage: %s FILENAME\n", option); + + *filep = argv[0]; + + return 1; +} + +static struct option copy_options[] = { + { "", copy_file, "Copy the specified file to stdout." }, + { NULL, NULL, + "Example:\n\n" + " $ gpgcompose --copy /etc/hostname\n\n" + "This is particularly useful when combined with gpgsplit." } +}; + +static int +copy (const char *option, int argc, char *argv[], void *cookie) +{ + iobuf_t out = cookie; + char *file = NULL; + iobuf_t in; + + int processed; + + processed = process_options (option, + major_options, + copy_options, &file, + global_options, NULL, + argc, argv); + if (! file) + log_fatal ("Usage: %s FILE\n", option); + + errno = 0; + in = iobuf_open (file); + if (! in) + log_fatal ("Error opening %s: %s.\n", + file, errno ? strerror (errno): "unknown error"); + + iobuf_copy (out, in); + if (iobuf_error (out)) + log_fatal ("Copying data to destination: %s\n", + gpg_strerror (iobuf_error (out))); + if (iobuf_error (in)) + log_fatal ("Reading data from %s: %s\n", + argv[0], gpg_strerror (iobuf_error (in))); + + iobuf_close (in); + + return processed; +} + +int +main (int argc, char *argv[]) +{ + const char *filename = "-"; + iobuf_t out; + int preprocessed = 1; + int processed; + ctrl_t ctrl; + + opt.ignore_time_conflict = 1; + /* Allow notations in the IETF space, for instance. */ + opt.expert = 1; + + global_ctrl = ctrl = xcalloc (1, sizeof *ctrl); + + keydb_add_resource ("pubring" EXTSEP_S GPGEXT_GPG, + KEYDB_RESOURCE_FLAG_DEFAULT); + + if (argc == 1) + /* Nothing to do. */ + return 0; + + if (strcmp (argv[1], "--output") == 0 + || strcmp (argv[1], "-o") == 0) + { + filename = argv[2]; + log_info ("Writing to %s\n", filename); + preprocessed += 2; + } + + out = iobuf_create (filename, 0); + if (! out) + log_fatal ("Failed to open stdout for writing\n"); + + processed = process_options (NULL, NULL, + major_options, out, + global_options, NULL, + argc - preprocessed, &argv[preprocessed]); + if (processed != argc - preprocessed) + log_fatal ("Didn't process %d options.\n", argc - preprocessed - processed); + + iobuf_close (out); + + return 0; +} + +/* Stubs duplicated from gpg.c. */ + +int g10_errors_seen = 0; + +/* Note: This function is used by signal handlers!. */ +static void +emergency_cleanup (void) +{ + gcry_control (GCRYCTL_TERM_SECMEM ); +} + +void +g10_exit( int rc ) +{ + gcry_control (GCRYCTL_UPDATE_RANDOM_SEED_FILE); + + emergency_cleanup (); + + rc = rc? rc : log_get_errorcount(0)? 2 : g10_errors_seen? 1 : 0; + exit (rc); +} + +void +keyedit_menu (ctrl_t ctrl, const char *username, strlist_t locusr, + strlist_t commands, int quiet, int seckey_check) +{ + (void) ctrl; + (void) username; + (void) locusr; + (void) commands; + (void) quiet; + (void) seckey_check; +} + +void +show_basic_key_info (ctrl_t ctrl, KBNODE keyblock, int made_from_sec) +{ + (void)ctrl; + (void)keyblock; + (void)made_from_sec; +} + +int +keyedit_print_one_sig (ctrl_t ctrl, estream_t fp, + int rc, kbnode_t keyblock, kbnode_t node, + int *inv_sigs, int *no_key, int *oth_err, + int is_selfsig, int print_without_key, int extended) +{ + (void) ctrl; + (void) fp; + (void) rc; + (void) keyblock; + (void) node; + (void) inv_sigs; + (void) no_key; + (void) oth_err; + (void) is_selfsig; + (void) print_without_key; + (void) extended; + return 0; +} |