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-rw-r--r--third_party/heimdal/lib/hdb/hdb-ldap.c2117
1 files changed, 2117 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/hdb/hdb-ldap.c b/third_party/heimdal/lib/hdb/hdb-ldap.c
new file mode 100644
index 0000000..5cd097f
--- /dev/null
+++ b/third_party/heimdal/lib/hdb/hdb-ldap.c
@@ -0,0 +1,2117 @@
+/*
+ * Copyright (c) 1999-2001, 2003, PADL Software Pty Ltd.
+ * Copyright (c) 2004, Andrew Bartlett.
+ * Copyright (c) 2003 - 2008, Kungliga Tekniska Högskolan.
+ * Copyright (c) 2015, Timothy Pearson.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of PADL Software nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "hdb_locl.h"
+
+#ifdef OPENLDAP
+
+#include <lber.h>
+#include <ldap.h>
+#include <sys/un.h>
+#include <hex.h>
+
+static krb5_error_code LDAP__connect(krb5_context context, HDB *);
+static krb5_error_code LDAP_close(krb5_context context, HDB *);
+
+static krb5_error_code
+LDAP_message2entry(krb5_context context, HDB * db, LDAPMessage * msg,
+ int flags, hdb_entry * ent);
+
+static const char *default_structural_object = "account";
+static char *structural_object;
+static const char *default_ldap_url = "ldapi:///";
+static krb5_boolean samba_forwardable;
+
+struct hdbldapdb {
+ LDAP *h_lp;
+ int h_msgid;
+ char *h_base;
+ char *h_url;
+ char *h_bind_dn;
+ char *h_bind_password;
+ krb5_boolean h_start_tls;
+ char *h_createbase;
+};
+
+#define HDB2LDAP(db) (((struct hdbldapdb *)(db)->hdb_db)->h_lp)
+#define HDB2MSGID(db) (((struct hdbldapdb *)(db)->hdb_db)->h_msgid)
+#define HDBSETMSGID(db,msgid) \
+ do { ((struct hdbldapdb *)(db)->hdb_db)->h_msgid = msgid; } while(0)
+#define HDB2BASE(dn) (((struct hdbldapdb *)(db)->hdb_db)->h_base)
+#define HDB2URL(dn) (((struct hdbldapdb *)(db)->hdb_db)->h_url)
+#define HDB2BINDDN(db) (((struct hdbldapdb *)(db)->hdb_db)->h_bind_dn)
+#define HDB2BINDPW(db) (((struct hdbldapdb *)(db)->hdb_db)->h_bind_password)
+#define HDB2CREATE(db) (((struct hdbldapdb *)(db)->hdb_db)->h_createbase)
+
+/*
+ *
+ */
+
+static char * krb5kdcentry_attrs[] = {
+ "cn",
+ "createTimestamp",
+ "creatorsName",
+ "krb5EncryptionType",
+ "krb5KDCFlags",
+ "krb5Key",
+ "krb5KeyVersionNumber",
+ "krb5MaxLife",
+ "krb5MaxRenew",
+ "krb5PasswordEnd",
+ "krb5PrincipalName",
+ "krb5PrincipalRealm",
+ "krb5ExtendedAttributes",
+ "krb5ValidEnd",
+ "krb5ValidStart",
+ "modifiersName",
+ "modifyTimestamp",
+ "objectClass",
+ "sambaAcctFlags",
+ "sambaKickoffTime",
+ "sambaNTPassword",
+ "sambaPwdLastSet",
+ "sambaPwdMustChange",
+ "uid",
+ NULL
+};
+
+static char *krb5principal_attrs[] = {
+ "cn",
+ "createTimestamp",
+ "creatorsName",
+ "krb5PrincipalName",
+ "krb5PrincipalRealm",
+ "modifiersName",
+ "modifyTimestamp",
+ "objectClass",
+ "uid",
+ NULL
+};
+
+static int
+LDAP_no_size_limit(krb5_context context, LDAP *lp)
+{
+ int ret, limit = LDAP_NO_LIMIT;
+
+ ret = ldap_set_option(lp, LDAP_OPT_SIZELIMIT, (const void *)&limit);
+ if (ret != LDAP_SUCCESS) {
+ krb5_set_error_message(context, HDB_ERR_BADVERSION,
+ "ldap_set_option: %s",
+ ldap_err2string(ret));
+ return HDB_ERR_BADVERSION;
+ }
+ return 0;
+}
+
+static int
+check_ldap(krb5_context context, HDB *db, int ret)
+{
+ switch (ret) {
+ case LDAP_SUCCESS:
+ return 0;
+ case LDAP_SERVER_DOWN:
+ LDAP_close(context, db);
+ return 1;
+ default:
+ return 1;
+ }
+}
+
+static krb5_error_code
+LDAP__setmod(LDAPMod *** modlist, int modop, const char *attribute,
+ int *pIndex)
+{
+ int cMods;
+
+ if (*modlist == NULL) {
+ *modlist = (LDAPMod **)ber_memcalloc(1, sizeof(LDAPMod *));
+ if (*modlist == NULL)
+ return ENOMEM;
+ }
+
+ for (cMods = 0; (*modlist)[cMods] != NULL; cMods++) {
+ if ((*modlist)[cMods]->mod_op == modop &&
+ strcasecmp((*modlist)[cMods]->mod_type, attribute) == 0) {
+ break;
+ }
+ }
+
+ *pIndex = cMods;
+
+ if ((*modlist)[cMods] == NULL) {
+ LDAPMod *mod;
+
+ *modlist = (LDAPMod **)ber_memrealloc(*modlist,
+ (cMods + 2) * sizeof(LDAPMod *));
+ if (*modlist == NULL)
+ return ENOMEM;
+
+ (*modlist)[cMods] = (LDAPMod *)ber_memalloc(sizeof(LDAPMod));
+ if ((*modlist)[cMods] == NULL)
+ return ENOMEM;
+
+ mod = (*modlist)[cMods];
+ mod->mod_op = modop;
+ mod->mod_type = ber_strdup(attribute);
+ if (mod->mod_type == NULL) {
+ ber_memfree(mod);
+ (*modlist)[cMods] = NULL;
+ return ENOMEM;
+ }
+
+ if (modop & LDAP_MOD_BVALUES) {
+ mod->mod_bvalues = NULL;
+ } else {
+ mod->mod_values = NULL;
+ }
+
+ (*modlist)[cMods + 1] = NULL;
+ }
+
+ return 0;
+}
+
+static krb5_error_code
+LDAP_addmod_len(LDAPMod *** modlist, int modop, const char *attribute,
+ unsigned char *value, size_t len)
+{
+ krb5_error_code ret;
+ int cMods, i = 0;
+
+ ret = LDAP__setmod(modlist, modop | LDAP_MOD_BVALUES, attribute, &cMods);
+ if (ret)
+ return ret;
+
+ if (value != NULL) {
+ struct berval **bv;
+
+ bv = (*modlist)[cMods]->mod_bvalues;
+ if (bv != NULL) {
+ for (i = 0; bv[i] != NULL; i++)
+ ;
+ bv = ber_memrealloc(bv, (i + 2) * sizeof(*bv));
+ } else
+ bv = ber_memalloc(2 * sizeof(*bv));
+ if (bv == NULL)
+ return ENOMEM;
+
+ (*modlist)[cMods]->mod_bvalues = bv;
+
+ bv[i] = ber_memalloc(sizeof(**bv));;
+ if (bv[i] == NULL)
+ return ENOMEM;
+
+ bv[i]->bv_val = (void *)value;
+ bv[i]->bv_len = len;
+
+ bv[i + 1] = NULL;
+ }
+
+ return 0;
+}
+
+static krb5_error_code
+LDAP_addmod(LDAPMod *** modlist, int modop, const char *attribute,
+ const char *value)
+{
+ int cMods, i = 0;
+ krb5_error_code ret;
+
+ ret = LDAP__setmod(modlist, modop, attribute, &cMods);
+ if (ret)
+ return ret;
+
+ if (value != NULL) {
+ char **bv;
+
+ bv = (*modlist)[cMods]->mod_values;
+ if (bv != NULL) {
+ for (i = 0; bv[i] != NULL; i++)
+ ;
+ bv = ber_memrealloc(bv, (i + 2) * sizeof(*bv));
+ } else
+ bv = ber_memalloc(2 * sizeof(*bv));
+ if (bv == NULL)
+ return ENOMEM;
+
+ (*modlist)[cMods]->mod_values = bv;
+
+ bv[i] = ber_strdup(value);
+ if (bv[i] == NULL)
+ return ENOMEM;
+
+ bv[i + 1] = NULL;
+ }
+
+ return 0;
+}
+
+static krb5_error_code
+LDAP_addmod_generalized_time(LDAPMod *** mods, int modop,
+ const char *attribute, KerberosTime * time)
+{
+ char buf[22];
+ struct tm *tm;
+
+ /* XXX not threadsafe */
+ tm = gmtime(time);
+ strftime(buf, sizeof(buf), "%Y%m%d%H%M%SZ", tm);
+
+ return LDAP_addmod(mods, modop, attribute, buf);
+}
+
+static krb5_error_code
+LDAP_addmod_integer(krb5_context context,
+ LDAPMod *** mods, int modop,
+ const char *attribute, unsigned long l)
+{
+ krb5_error_code ret;
+ char *buf;
+
+ ret = asprintf(&buf, "%ld", l);
+ if (ret < 0) {
+ krb5_set_error_message(context, ENOMEM,
+ "asprintf: out of memory:");
+ return ENOMEM;
+ }
+ ret = LDAP_addmod(mods, modop, attribute, buf);
+ free (buf);
+ return ret;
+}
+
+static krb5_error_code
+LDAP_get_string_value(HDB * db, LDAPMessage * entry,
+ const char *attribute, char **ptr)
+{
+ struct berval **vals;
+
+ vals = ldap_get_values_len(HDB2LDAP(db), entry, attribute);
+ if (vals == NULL || vals[0] == NULL) {
+ *ptr = NULL;
+ return HDB_ERR_NOENTRY;
+ }
+
+ *ptr = malloc(vals[0]->bv_len + 1);
+ if (*ptr == NULL) {
+ ldap_value_free_len(vals);
+ return ENOMEM;
+ }
+
+ memcpy(*ptr, vals[0]->bv_val, vals[0]->bv_len);
+ (*ptr)[vals[0]->bv_len] = 0;
+
+ ldap_value_free_len(vals);
+
+ return 0;
+}
+
+static krb5_error_code
+LDAP_get_integer_value(HDB * db, LDAPMessage * entry,
+ const char *attribute, int *ptr)
+{
+ krb5_error_code ret;
+ char *val;
+
+ ret = LDAP_get_string_value(db, entry, attribute, &val);
+ if (ret)
+ return ret;
+ *ptr = atoi(val);
+ free(val);
+ return 0;
+}
+
+static krb5_error_code
+LDAP_get_generalized_time_value(HDB * db, LDAPMessage * entry,
+ const char *attribute, KerberosTime * kt)
+{
+ char *tmp, *gentime;
+ struct tm tm;
+ int ret;
+
+ *kt = 0;
+
+ ret = LDAP_get_string_value(db, entry, attribute, &gentime);
+ if (ret)
+ return ret;
+
+ tmp = strptime(gentime, "%Y%m%d%H%M%SZ", &tm);
+ if (tmp == NULL) {
+ free(gentime);
+ return HDB_ERR_NOENTRY;
+ }
+
+ free(gentime);
+
+ *kt = timegm(&tm);
+
+ return 0;
+}
+
+static int
+bervalstrcmp(struct berval *v, const char *str)
+{
+ size_t len = strlen(str);
+ return (v->bv_len == len) && strncasecmp(str, (char *)v->bv_val, len) == 0;
+}
+
+
+static krb5_error_code
+LDAP_entry2mods(krb5_context context, HDB * db, hdb_entry * ent,
+ LDAPMessage * msg, LDAPMod *** pmods, krb5_boolean *pis_new_entry)
+{
+ krb5_error_code ret;
+ krb5_boolean is_new_entry = FALSE;
+ char *tmp = NULL;
+ LDAPMod **mods = NULL;
+ hdb_entry orig;
+ unsigned long oflags, nflags;
+ int i;
+
+ krb5_boolean is_samba_account = FALSE;
+ krb5_boolean is_account = FALSE;
+ krb5_boolean is_heimdal_entry = FALSE;
+ krb5_boolean is_heimdal_principal = FALSE;
+
+ struct berval **vals;
+
+ *pmods = NULL;
+
+ if (msg != NULL) {
+
+ ret = LDAP_message2entry(context, db, msg, 0, &orig);
+ if (ret)
+ goto out;
+
+ vals = ldap_get_values_len(HDB2LDAP(db), msg, "objectClass");
+ if (vals) {
+ int num_objectclasses = ldap_count_values_len(vals);
+ for (i=0; i < num_objectclasses; i++) {
+ if (bervalstrcmp(vals[i], "sambaSamAccount"))
+ is_samba_account = TRUE;
+ else if (bervalstrcmp(vals[i], structural_object))
+ is_account = TRUE;
+ else if (bervalstrcmp(vals[i], "krb5Principal"))
+ is_heimdal_principal = TRUE;
+ else if (bervalstrcmp(vals[i], "krb5KDCEntry"))
+ is_heimdal_entry = TRUE;
+ }
+ ldap_value_free_len(vals);
+ }
+
+ /*
+ * If this is just a "account" entry and no other objectclass
+ * is hanging on this entry, it's really a new entry.
+ */
+ if (is_samba_account == FALSE && is_heimdal_principal == FALSE &&
+ is_heimdal_entry == FALSE) {
+ if (is_account == TRUE) {
+ is_new_entry = TRUE;
+ } else {
+ ret = HDB_ERR_NOENTRY;
+ goto out;
+ }
+ }
+ } else
+ is_new_entry = TRUE;
+
+ if (is_new_entry) {
+
+ /* to make it perfectly obvious we're depending on
+ * orig being intiialized to zero */
+ memset(&orig, 0, sizeof(orig));
+
+ /* account is the structural object class */
+ if (is_account == FALSE) {
+ ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "top");
+ if (ret)
+ goto out;
+
+ ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass",
+ structural_object);
+ is_account = TRUE;
+ if (ret)
+ goto out;
+ }
+
+ ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "krb5Principal");
+ is_heimdal_principal = TRUE;
+ if (ret)
+ goto out;
+
+ ret = LDAP_addmod(&mods, LDAP_MOD_ADD, "objectClass", "krb5KDCEntry");
+ is_heimdal_entry = TRUE;
+ if (ret)
+ goto out;
+ }
+
+ if (is_new_entry ||
+ krb5_principal_compare(context, ent->principal, orig.principal)
+ == FALSE)
+ {
+ if (is_heimdal_principal || is_heimdal_entry) {
+
+ ret = krb5_unparse_name(context, ent->principal, &tmp);
+ if (ret)
+ goto out;
+
+ ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE,
+ "krb5PrincipalName", tmp);
+ if (ret) {
+ free(tmp);
+ goto out;
+ }
+ free(tmp);
+ }
+
+ if (is_account || is_samba_account) {
+ ret = krb5_unparse_name_short(context, ent->principal, &tmp);
+ if (ret)
+ goto out;
+ ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE, "uid", tmp);
+ if (ret) {
+ free(tmp);
+ goto out;
+ }
+ free(tmp);
+ }
+ }
+
+ if (is_heimdal_entry && (ent->kvno != orig.kvno || is_new_entry)) {
+ ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
+ "krb5KeyVersionNumber",
+ ent->kvno);
+ if (ret)
+ goto out;
+ }
+
+ if (is_heimdal_entry && ent->extensions) {
+ if (!is_new_entry) {
+ vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5ExtendedAttributes");
+ if (vals) {
+ ldap_value_free_len(vals);
+ ret = LDAP_addmod(&mods, LDAP_MOD_DELETE, "krb5ExtendedAttributes", NULL);
+ if (ret)
+ goto out;
+ }
+ }
+
+ for (i = 0; i < ent->extensions->len; i++) {
+ unsigned char *buf;
+ size_t size, sz = 0;
+
+ ASN1_MALLOC_ENCODE(HDB_extension, buf, size, &ent->extensions->val[i], &sz, ret);
+ if (ret)
+ goto out;
+ if (size != sz)
+ krb5_abortx(context, "internal error in ASN.1 encoder");
+
+ ret = LDAP_addmod_len(&mods, LDAP_MOD_ADD, "krb5ExtendedAttributes", buf, sz);
+ if (ret)
+ goto out;
+ }
+ }
+
+ if (is_heimdal_entry && ent->valid_start) {
+ if (orig.valid_end == NULL
+ || (*(ent->valid_start) != *(orig.valid_start))) {
+ ret = LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
+ "krb5ValidStart",
+ ent->valid_start);
+ if (ret)
+ goto out;
+ }
+ }
+
+ if (ent->valid_end) {
+ if (orig.valid_end == NULL || (*(ent->valid_end) != *(orig.valid_end))) {
+ if (is_heimdal_entry) {
+ ret = LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
+ "krb5ValidEnd",
+ ent->valid_end);
+ if (ret)
+ goto out;
+ }
+ if (is_samba_account) {
+ ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
+ "sambaKickoffTime",
+ *(ent->valid_end));
+ if (ret)
+ goto out;
+ }
+ }
+ }
+
+ if (ent->pw_end) {
+ if (orig.pw_end == NULL || (*(ent->pw_end) != *(orig.pw_end))) {
+ if (is_heimdal_entry) {
+ ret = LDAP_addmod_generalized_time(&mods, LDAP_MOD_REPLACE,
+ "krb5PasswordEnd",
+ ent->pw_end);
+ if (ret)
+ goto out;
+ }
+
+ if (is_samba_account) {
+ ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
+ "sambaPwdMustChange",
+ *(ent->pw_end));
+ if (ret)
+ goto out;
+ }
+ }
+ }
+
+
+#if 0 /* we we have last_pw_change */
+ if (is_samba_account && ent->last_pw_change) {
+ if (orig.last_pw_change == NULL || (*(ent->last_pw_change) != *(orig.last_pw_change))) {
+ ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
+ "sambaPwdLastSet",
+ *(ent->last_pw_change));
+ if (ret)
+ goto out;
+ }
+ }
+#endif
+
+ if (is_heimdal_entry && ent->max_life) {
+ if (orig.max_life == NULL
+ || (*(ent->max_life) != *(orig.max_life))) {
+
+ ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
+ "krb5MaxLife",
+ *(ent->max_life));
+ if (ret)
+ goto out;
+ }
+ }
+
+ if (is_heimdal_entry && ent->max_renew) {
+ if (orig.max_renew == NULL
+ || (*(ent->max_renew) != *(orig.max_renew))) {
+
+ ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
+ "krb5MaxRenew",
+ *(ent->max_renew));
+ if (ret)
+ goto out;
+ }
+ }
+
+ oflags = HDBFlags2int(orig.flags);
+ nflags = HDBFlags2int(ent->flags);
+
+ if (is_heimdal_entry && oflags != nflags) {
+
+ ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
+ "krb5KDCFlags",
+ nflags);
+ if (ret)
+ goto out;
+ }
+
+ /* Remove keys if they exists, and then replace keys. */
+ if (!is_new_entry && orig.keys.len > 0) {
+ vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5Key");
+ if (vals) {
+ ldap_value_free_len(vals);
+
+ ret = LDAP_addmod(&mods, LDAP_MOD_DELETE, "krb5Key", NULL);
+ if (ret)
+ goto out;
+ }
+ }
+
+ for (i = 0; i < ent->keys.len; i++) {
+
+ if (is_samba_account
+ && ent->keys.val[i].key.keytype == ETYPE_ARCFOUR_HMAC_MD5) {
+ char *ntHexPassword;
+ char *nt;
+ time_t now = time(NULL);
+
+ /* the key might have been 'sealed', but samba passwords
+ are clear in the directory */
+ ret = hdb_unseal_key(context, db, &ent->keys.val[i]);
+ if (ret)
+ goto out;
+
+ nt = ent->keys.val[i].key.keyvalue.data;
+ /* store in ntPassword, not krb5key */
+ ret = hex_encode(nt, 16, &ntHexPassword);
+ if (ret < 0) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "hdb-ldap: failed to "
+ "hex encode key");
+ goto out;
+ }
+ ret = LDAP_addmod(&mods, LDAP_MOD_REPLACE, "sambaNTPassword",
+ ntHexPassword);
+ free(ntHexPassword);
+ if (ret)
+ goto out;
+ ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_REPLACE,
+ "sambaPwdLastSet", now);
+ if (ret)
+ goto out;
+
+ /* have to kill the LM passwod if it exists */
+ vals = ldap_get_values_len(HDB2LDAP(db), msg, "sambaLMPassword");
+ if (vals) {
+ ldap_value_free_len(vals);
+ ret = LDAP_addmod(&mods, LDAP_MOD_DELETE,
+ "sambaLMPassword", NULL);
+ if (ret)
+ goto out;
+ }
+
+ } else if (is_heimdal_entry) {
+ unsigned char *buf;
+ size_t len, buf_size;
+
+ ASN1_MALLOC_ENCODE(Key, buf, buf_size, &ent->keys.val[i], &len, ret);
+ if (ret)
+ goto out;
+ if(buf_size != len)
+ krb5_abortx(context, "internal error in ASN.1 encoder");
+
+ /* addmod_len _owns_ the key, doesn't need to copy it */
+ ret = LDAP_addmod_len(&mods, LDAP_MOD_ADD, "krb5Key", buf, len);
+ if (ret)
+ goto out;
+ }
+ }
+
+ if (ent->etypes) {
+ int add_krb5EncryptionType = 0;
+
+ /*
+ * Only add/modify krb5EncryptionType if it's a new heimdal
+ * entry or krb5EncryptionType already exists on the entry.
+ */
+
+ if (!is_new_entry) {
+ vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5EncryptionType");
+ if (vals) {
+ ldap_value_free_len(vals);
+ ret = LDAP_addmod(&mods, LDAP_MOD_DELETE, "krb5EncryptionType",
+ NULL);
+ if (ret)
+ goto out;
+ add_krb5EncryptionType = 1;
+ }
+ } else if (is_heimdal_entry)
+ add_krb5EncryptionType = 1;
+
+ if (add_krb5EncryptionType) {
+ for (i = 0; i < ent->etypes->len; i++) {
+ if (is_samba_account &&
+ ent->keys.val[i].key.keytype == ETYPE_ARCFOUR_HMAC_MD5)
+ {
+ ;
+ } else if (is_heimdal_entry) {
+ ret = LDAP_addmod_integer(context, &mods, LDAP_MOD_ADD,
+ "krb5EncryptionType",
+ ent->etypes->val[i]);
+ if (ret)
+ goto out;
+ }
+ }
+ }
+ }
+
+ /* for clarity */
+ ret = 0;
+
+ out:
+
+ *pis_new_entry = is_new_entry;
+
+ if (ret == 0)
+ *pmods = mods;
+ else if (mods != NULL) {
+ ldap_mods_free(mods, 1);
+ *pmods = NULL;
+ }
+
+ if (msg)
+ hdb_free_entry(context, db, &orig);
+
+ return ret;
+}
+
+static krb5_error_code
+LDAP_dn2principal(krb5_context context, HDB * db, const char *dn,
+ krb5_principal * principal)
+{
+ krb5_error_code ret;
+ int rc;
+ const char *filter = "(objectClass=krb5Principal)";
+ LDAPMessage *res = NULL, *e;
+ char *p;
+
+ ret = LDAP_no_size_limit(context, HDB2LDAP(db));
+ if (ret)
+ goto out;
+
+ rc = ldap_search_ext_s(HDB2LDAP(db), dn, LDAP_SCOPE_SUBTREE,
+ filter, krb5principal_attrs, 0,
+ NULL, NULL, NULL,
+ 0, &res);
+ if (check_ldap(context, db, rc)) {
+ ret = HDB_ERR_NOENTRY;
+ krb5_set_error_message(context, ret, "ldap_search_ext_s: "
+ "filter: %s error: %s",
+ filter, ldap_err2string(rc));
+ goto out;
+ }
+
+ e = ldap_first_entry(HDB2LDAP(db), res);
+ if (e == NULL) {
+ ret = HDB_ERR_NOENTRY;
+ goto out;
+ }
+
+ ret = LDAP_get_string_value(db, e, "krb5PrincipalName", &p);
+ if (ret) {
+ ret = HDB_ERR_NOENTRY;
+ goto out;
+ }
+
+ ret = krb5_parse_name(context, p, principal);
+ free(p);
+
+ out:
+ if (res)
+ ldap_msgfree(res);
+
+ return ret;
+}
+
+static int
+need_quote(unsigned char c)
+{
+ return (c & 0x80) ||
+ (c < 32) ||
+ (c == '(') ||
+ (c == ')') ||
+ (c == '*') ||
+ (c == '\\') ||
+ (c == 0x7f);
+}
+
+static const char hexchar[] = "0123456789ABCDEF";
+
+static krb5_error_code
+escape_value(krb5_context context, const char *unquoted, char **quoted)
+{
+ size_t i, len;
+
+ for (i = 0, len = 0; unquoted[i] != '\0'; i++, len++) {
+ if (need_quote((unsigned char)unquoted[i]))
+ len += 2;
+ }
+
+ *quoted = malloc(len + 1);
+ if (*quoted == NULL) {
+ krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
+ return ENOMEM;
+ }
+
+ for (i = 0; unquoted[0] ; unquoted++) {
+ if (need_quote((unsigned char)unquoted[0])) {
+ (*quoted)[i++] = '\\';
+ (*quoted)[i++] = hexchar[(unquoted[0] >> 4) & 0xf];
+ (*quoted)[i++] = hexchar[(unquoted[0] ) & 0xf];
+ } else
+ (*quoted)[i++] = (char)unquoted[0];
+ }
+ (*quoted)[i] = '\0';
+ return 0;
+}
+
+
+static krb5_error_code
+LDAP__lookup_princ(krb5_context context,
+ HDB *db,
+ const char *princname,
+ const char *userid,
+ LDAPMessage **msg)
+{
+ krb5_error_code ret;
+ int rc;
+ char *quote, *filter = NULL;
+
+ ret = LDAP__connect(context, db);
+ if (ret)
+ return ret;
+
+ /*
+ * Quote searches that contain filter language, this quote
+ * searches for *@REALM, which takes very long time.
+ */
+
+ ret = escape_value(context, princname, &quote);
+ if (ret)
+ goto out;
+
+ rc = asprintf(&filter,
+ "(&(objectClass=krb5Principal)(krb5PrincipalName=%s))",
+ quote);
+ free(quote);
+
+ if (rc < 0) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+
+ ret = LDAP_no_size_limit(context, HDB2LDAP(db));
+ if (ret)
+ goto out;
+
+ rc = ldap_search_ext_s(HDB2LDAP(db), HDB2BASE(db),
+ LDAP_SCOPE_SUBTREE, filter,
+ krb5kdcentry_attrs, 0,
+ NULL, NULL, NULL,
+ 0, msg);
+ if (check_ldap(context, db, rc)) {
+ ret = HDB_ERR_NOENTRY;
+ krb5_set_error_message(context, ret, "ldap_search_ext_s: "
+ "filter: %s - error: %s",
+ filter, ldap_err2string(rc));
+ goto out;
+ }
+
+ if (userid && ldap_count_entries(HDB2LDAP(db), *msg) == 0) {
+ free(filter);
+ filter = NULL;
+ ldap_msgfree(*msg);
+ *msg = NULL;
+
+ ret = escape_value(context, userid, &quote);
+ if (ret)
+ goto out;
+
+ rc = asprintf(&filter,
+ "(&(|(objectClass=sambaSamAccount)(objectClass=%s))(uid=%s))",
+ structural_object, quote);
+ free(quote);
+ if (rc < 0) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "asprintf: out of memory");
+ goto out;
+ }
+
+ ret = LDAP_no_size_limit(context, HDB2LDAP(db));
+ if (ret)
+ goto out;
+
+ rc = ldap_search_ext_s(HDB2LDAP(db), HDB2BASE(db), LDAP_SCOPE_SUBTREE,
+ filter, krb5kdcentry_attrs, 0,
+ NULL, NULL, NULL,
+ 0, msg);
+ if (check_ldap(context, db, rc)) {
+ ret = HDB_ERR_NOENTRY;
+ krb5_set_error_message(context, ret,
+ "ldap_search_ext_s: filter: %s error: %s",
+ filter, ldap_err2string(rc));
+ goto out;
+ }
+ }
+
+ ret = 0;
+
+ out:
+ if (filter)
+ free(filter);
+
+ return ret;
+}
+
+static krb5_error_code
+LDAP_principal2message(krb5_context context, HDB * db,
+ krb5_const_principal princ, LDAPMessage ** msg)
+{
+ char *name, *name_short = NULL;
+ krb5_error_code ret;
+ krb5_realm *r, *r0;
+
+ *msg = NULL;
+
+ ret = krb5_unparse_name(context, princ, &name);
+ if (ret)
+ return ret;
+
+ ret = krb5_get_default_realms(context, &r0);
+ if(ret) {
+ free(name);
+ return ret;
+ }
+ for (r = r0; *r != NULL; r++) {
+ if(strcmp(krb5_principal_get_realm(context, princ), *r) == 0) {
+ ret = krb5_unparse_name_short(context, princ, &name_short);
+ if (ret) {
+ krb5_free_host_realm(context, r0);
+ free(name);
+ return ret;
+ }
+ break;
+ }
+ }
+ krb5_free_host_realm(context, r0);
+
+ ret = LDAP__lookup_princ(context, db, name, name_short, msg);
+ free(name);
+ free(name_short);
+
+ return ret;
+}
+
+/*
+ * Construct an hdb_entry from a directory entry.
+ */
+static krb5_error_code
+LDAP_message2entry(krb5_context context, HDB * db, LDAPMessage * msg,
+ int flags, hdb_entry * ent)
+{
+ char *unparsed_name = NULL, *dn = NULL, *ntPasswordIN = NULL;
+ char *samba_acct_flags = NULL;
+ struct berval **keys;
+ struct berval **extensions;
+ struct berval **vals;
+ int tmp, tmp_time, i, ret, have_arcfour = 0;
+
+ memset(ent, 0, sizeof(*ent));
+ ent->flags = int2HDBFlags(0);
+
+ ret = LDAP_get_string_value(db, msg, "krb5PrincipalName", &unparsed_name);
+ if (ret == 0) {
+ ret = krb5_parse_name(context, unparsed_name, &ent->principal);
+ if (ret)
+ goto out;
+ } else {
+ ret = LDAP_get_string_value(db, msg, "uid",
+ &unparsed_name);
+ if (ret == 0) {
+ ret = krb5_parse_name(context, unparsed_name, &ent->principal);
+ if (ret)
+ goto out;
+ } else {
+ krb5_set_error_message(context, HDB_ERR_NOENTRY,
+ "hdb-ldap: ldap entry missing"
+ "principal name");
+ return HDB_ERR_NOENTRY;
+ }
+ }
+
+ {
+ int integer;
+ ret = LDAP_get_integer_value(db, msg, "krb5KeyVersionNumber",
+ &integer);
+ if (ret)
+ ent->kvno = 0;
+ else
+ ent->kvno = integer;
+ }
+
+ keys = ldap_get_values_len(HDB2LDAP(db), msg, "krb5Key");
+ if (keys != NULL) {
+ size_t l;
+
+ ent->keys.len = ldap_count_values_len(keys);
+ ent->keys.val = (Key *) calloc(ent->keys.len, sizeof(Key));
+ if (ent->keys.val == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "calloc: out of memory");
+ goto out;
+ }
+ for (i = 0; i < ent->keys.len; i++) {
+ decode_Key((unsigned char *) keys[i]->bv_val,
+ (size_t) keys[i]->bv_len, &ent->keys.val[i], &l);
+ }
+ ber_bvecfree(keys);
+ } else {
+#if 1
+ /*
+ * This violates the ASN1 but it allows a principal to
+ * be related to a general directory entry without creating
+ * the keys. Hopefully it's OK.
+ */
+ ent->keys.len = 0;
+ ent->keys.val = NULL;
+#else
+ ret = HDB_ERR_NOENTRY;
+ goto out;
+#endif
+ }
+
+ extensions = ldap_get_values_len(HDB2LDAP(db), msg, "krb5ExtendedAttributes");
+ if (extensions != NULL) {
+ size_t l;
+
+ ent->extensions = calloc(1, sizeof(*(ent->extensions)));
+ if (ent->extensions == NULL) {
+ ret = krb5_enomem(context);
+ goto out;
+ }
+ ent->extensions->len = ldap_count_values_len(extensions);
+ ent->extensions->val = (HDB_extension *) calloc(ent->extensions->len, sizeof(HDB_extension));
+ if (ent->extensions->val == NULL) {
+ ent->extensions->len = 0;
+ ret = krb5_enomem(context);
+ goto out;
+ }
+ for (i = 0; i < ent->extensions->len; i++) {
+ ret = decode_HDB_extension((unsigned char *) extensions[i]->bv_val,
+ (size_t) extensions[i]->bv_len, &ent->extensions->val[i], &l);
+ if (ret)
+ krb5_set_error_message(context, ret, "decode_HDB_extension failed");
+ }
+ ber_bvecfree(extensions);
+ } else {
+ ent->extensions = NULL;
+ }
+
+ vals = ldap_get_values_len(HDB2LDAP(db), msg, "krb5EncryptionType");
+ if (vals != NULL) {
+ ent->etypes = malloc(sizeof(*(ent->etypes)));
+ if (ent->etypes == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret,"malloc: out of memory");
+ goto out;
+ }
+ ent->etypes->len = ldap_count_values_len(vals);
+ ent->etypes->val = calloc(ent->etypes->len,
+ sizeof(ent->etypes->val[0]));
+ if (ent->etypes->val == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ ent->etypes->len = 0;
+ goto out;
+ }
+ for (i = 0; i < ent->etypes->len; i++) {
+ char *buf;
+
+ buf = malloc(vals[i]->bv_len + 1);
+ if (buf == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ memcpy(buf, vals[i]->bv_val, vals[i]->bv_len);
+ buf[vals[i]->bv_len] = '\0';
+ ent->etypes->val[i] = atoi(buf);
+ free(buf);
+ }
+ ldap_value_free_len(vals);
+ }
+
+ for (i = 0; i < ent->keys.len; i++) {
+ if (ent->keys.val[i].key.keytype == ETYPE_ARCFOUR_HMAC_MD5) {
+ have_arcfour = 1;
+ break;
+ }
+ }
+
+ /* manually construct the NT (type 23) key */
+ ret = LDAP_get_string_value(db, msg, "sambaNTPassword", &ntPasswordIN);
+ if (ret == 0 && have_arcfour == 0) {
+ unsigned *etypes;
+ Key *ks;
+
+ ks = realloc(ent->keys.val,
+ (ent->keys.len + 1) *
+ sizeof(ent->keys.val[0]));
+ if (ks == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ ent->keys.val = ks;
+ memset(&ent->keys.val[ent->keys.len], 0, sizeof(Key));
+ ent->keys.val[ent->keys.len].key.keytype = ETYPE_ARCFOUR_HMAC_MD5;
+ ret = krb5_data_alloc (&ent->keys.val[ent->keys.len].key.keyvalue, 16);
+ if (ret) {
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ ret = ENOMEM;
+ goto out;
+ }
+ ret = hex_decode(ntPasswordIN,
+ ent->keys.val[ent->keys.len].key.keyvalue.data, 16);
+ ent->keys.len++;
+ if (ret == -1) {
+ krb5_set_error_message(context, ret = EINVAL,
+ "invalid hex encoding of password");
+ goto out;
+ }
+
+ if (ent->etypes == NULL) {
+ ent->etypes = malloc(sizeof(*(ent->etypes)));
+ if (ent->etypes == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ ent->etypes->val = NULL;
+ ent->etypes->len = 0;
+ }
+
+ for (i = 0; i < ent->etypes->len; i++)
+ if (ent->etypes->val[i] == ETYPE_ARCFOUR_HMAC_MD5)
+ break;
+ /* If there is no ARCFOUR enctype, add one */
+ if (i == ent->etypes->len) {
+ etypes = realloc(ent->etypes->val,
+ (ent->etypes->len + 1) *
+ sizeof(ent->etypes->val[0]));
+ if (etypes == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ ent->etypes->val = etypes;
+ ent->etypes->val[ent->etypes->len] =
+ ETYPE_ARCFOUR_HMAC_MD5;
+ ent->etypes->len++;
+ }
+ }
+
+ ret = LDAP_get_generalized_time_value(db, msg, "createTimestamp",
+ &ent->created_by.time);
+ if (ret)
+ ent->created_by.time = time(NULL);
+
+ ent->created_by.principal = NULL;
+
+ if (flags & HDB_F_ADMIN_DATA) {
+ ret = LDAP_get_string_value(db, msg, "creatorsName", &dn);
+ if (ret == 0) {
+ LDAP_dn2principal(context, db, dn, &ent->created_by.principal);
+ free(dn);
+ }
+
+ ent->modified_by = calloc(1, sizeof(*ent->modified_by));
+ if (ent->modified_by == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+
+ ret = LDAP_get_generalized_time_value(db, msg, "modifyTimestamp",
+ &ent->modified_by->time);
+ if (ret == 0) {
+ ret = LDAP_get_string_value(db, msg, "modifiersName", &dn);
+ if (ret == 0) {
+ LDAP_dn2principal(context, db, dn, &ent->modified_by->principal);
+ free(dn);
+ } else {
+ free(ent->modified_by);
+ ent->modified_by = NULL;
+ }
+ }
+ }
+
+ ent->valid_start = malloc(sizeof(*ent->valid_start));
+ if (ent->valid_start == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ ret = LDAP_get_generalized_time_value(db, msg, "krb5ValidStart",
+ ent->valid_start);
+ if (ret) {
+ /* OPTIONAL */
+ free(ent->valid_start);
+ ent->valid_start = NULL;
+ }
+
+ ent->valid_end = malloc(sizeof(*ent->valid_end));
+ if (ent->valid_end == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ ret = LDAP_get_generalized_time_value(db, msg, "krb5ValidEnd",
+ ent->valid_end);
+ if (ret) {
+ /* OPTIONAL */
+ free(ent->valid_end);
+ ent->valid_end = NULL;
+ }
+
+ ret = LDAP_get_integer_value(db, msg, "sambaKickoffTime", &tmp_time);
+ if (ret == 0) {
+ if (ent->valid_end == NULL) {
+ ent->valid_end = malloc(sizeof(*ent->valid_end));
+ if (ent->valid_end == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ }
+ *ent->valid_end = tmp_time;
+ }
+
+ ent->pw_end = malloc(sizeof(*ent->pw_end));
+ if (ent->pw_end == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ ret = LDAP_get_generalized_time_value(db, msg, "krb5PasswordEnd",
+ ent->pw_end);
+ if (ret) {
+ /* OPTIONAL */
+ free(ent->pw_end);
+ ent->pw_end = NULL;
+ }
+
+ ret = LDAP_get_integer_value(db, msg, "sambaPwdLastSet", &tmp_time);
+ if (ret == 0) {
+ time_t delta;
+
+ delta = krb5_config_get_time_default(context, NULL,
+ 0,
+ "kadmin",
+ "password_lifetime",
+ NULL);
+
+ if (delta) {
+ if (ent->pw_end == NULL) {
+ ent->pw_end = malloc(sizeof(*ent->pw_end));
+ if (ent->pw_end == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ }
+
+ *ent->pw_end = tmp_time + delta;
+ }
+ }
+
+ ret = LDAP_get_integer_value(db, msg, "sambaPwdMustChange", &tmp_time);
+ if (ret == 0) {
+ if (ent->pw_end == NULL) {
+ ent->pw_end = malloc(sizeof(*ent->pw_end));
+ if (ent->pw_end == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ }
+ *ent->pw_end = tmp_time;
+ }
+
+ /* OPTIONAL */
+ ret = LDAP_get_integer_value(db, msg, "sambaPwdLastSet", &tmp_time);
+ if (ret == 0)
+ hdb_entry_set_pw_change_time(context, ent, tmp_time);
+
+ {
+ int max_life;
+
+ ent->max_life = malloc(sizeof(*ent->max_life));
+ if (ent->max_life == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ ret = LDAP_get_integer_value(db, msg, "krb5MaxLife", &max_life);
+ if (ret) {
+ free(ent->max_life);
+ ent->max_life = NULL;
+ } else
+ *ent->max_life = max_life;
+ }
+
+ {
+ int max_renew;
+
+ ent->max_renew = malloc(sizeof(*ent->max_renew));
+ if (ent->max_renew == NULL) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "malloc: out of memory");
+ goto out;
+ }
+ ret = LDAP_get_integer_value(db, msg, "krb5MaxRenew", &max_renew);
+ if (ret) {
+ free(ent->max_renew);
+ ent->max_renew = NULL;
+ } else
+ *ent->max_renew = max_renew;
+ }
+
+ ret = LDAP_get_integer_value(db, msg, "krb5KDCFlags", &tmp);
+ if (ret)
+ tmp = 0;
+
+ ent->flags = int2HDBFlags(tmp);
+
+ /* Try and find Samba flags to put into the mix */
+ ret = LDAP_get_string_value(db, msg, "sambaAcctFlags", &samba_acct_flags);
+ if (ret == 0) {
+ /* parse the [UXW...] string:
+
+ 'N' No password
+ 'D' Disabled
+ 'H' Homedir required
+ 'T' Temp account.
+ 'U' User account (normal)
+ 'M' MNS logon user account - what is this ?
+ 'W' Workstation account
+ 'S' Server account
+ 'L' Locked account
+ 'X' No Xpiry on password
+ 'I' Interdomain trust account
+
+ */
+
+ int flags_len = strlen(samba_acct_flags);
+
+ if (flags_len < 2)
+ goto out2;
+
+ if (samba_acct_flags[0] != '['
+ || samba_acct_flags[flags_len - 1] != ']')
+ goto out2;
+
+ /* Allow forwarding */
+ if (samba_forwardable)
+ ent->flags.forwardable = TRUE;
+
+ for (i=0; i < flags_len; i++) {
+ switch (samba_acct_flags[i]) {
+ case ' ':
+ case '[':
+ case ']':
+ break;
+ case 'N':
+ /* how to handle no password in kerberos? */
+ break;
+ case 'D':
+ ent->flags.invalid = TRUE;
+ break;
+ case 'H':
+ break;
+ case 'T':
+ /* temp duplicate */
+ ent->flags.invalid = TRUE;
+ break;
+ case 'U':
+ ent->flags.client = TRUE;
+ break;
+ case 'M':
+ break;
+ case 'W':
+ case 'S':
+ ent->flags.server = TRUE;
+ ent->flags.client = TRUE;
+ break;
+ case 'L':
+ ent->flags.invalid = TRUE;
+ break;
+ case 'X':
+ if (ent->pw_end) {
+ free(ent->pw_end);
+ ent->pw_end = NULL;
+ }
+ break;
+ case 'I':
+ ent->flags.server = TRUE;
+ ent->flags.client = TRUE;
+ break;
+ }
+ }
+ out2:
+ free(samba_acct_flags);
+ }
+
+ ret = 0;
+
+out:
+ free(unparsed_name);
+ free(ntPasswordIN);
+
+ if (ret)
+ hdb_free_entry(context, db, ent);
+
+ return ret;
+}
+
+static krb5_error_code
+LDAP_close(krb5_context context, HDB * db)
+{
+ if (HDB2LDAP(db)) {
+ ldap_unbind_ext(HDB2LDAP(db), NULL, NULL);
+ ((struct hdbldapdb *)db->hdb_db)->h_lp = NULL;
+ }
+
+ return 0;
+}
+
+static krb5_error_code
+LDAP_lock(krb5_context context, HDB * db, int operation)
+{
+ return 0;
+}
+
+static krb5_error_code
+LDAP_unlock(krb5_context context, HDB * db)
+{
+ return 0;
+}
+
+static krb5_error_code
+LDAP_seq(krb5_context context, HDB * db, unsigned flags, hdb_entry * entry)
+{
+ int msgid, rc, parserc;
+ krb5_error_code ret;
+ LDAPMessage *e;
+
+ msgid = HDB2MSGID(db);
+ if (msgid < 0)
+ return HDB_ERR_NOENTRY;
+
+ do {
+ rc = ldap_result(HDB2LDAP(db), msgid, LDAP_MSG_ONE, NULL, &e);
+ switch (rc) {
+ case LDAP_RES_SEARCH_REFERENCE:
+ ldap_msgfree(e);
+ ret = 0;
+ break;
+ case LDAP_RES_SEARCH_ENTRY:
+ /* We have an entry. Parse it. */
+ ret = LDAP_message2entry(context, db, e, flags, entry);
+ ldap_msgfree(e);
+ break;
+ case LDAP_RES_SEARCH_RESULT:
+ /* We're probably at the end of the results. If not, abandon. */
+ parserc =
+ ldap_parse_result(HDB2LDAP(db), e, NULL, NULL, NULL,
+ NULL, NULL, 1);
+ ret = HDB_ERR_NOENTRY;
+ if (parserc != LDAP_SUCCESS
+ && parserc != LDAP_MORE_RESULTS_TO_RETURN) {
+ krb5_set_error_message(context, ret, "ldap_parse_result: %s",
+ ldap_err2string(parserc));
+ ldap_abandon_ext(HDB2LDAP(db), msgid, NULL, NULL);
+ }
+ HDBSETMSGID(db, -1);
+ break;
+ case LDAP_SERVER_DOWN:
+ ldap_msgfree(e);
+ LDAP_close(context, db);
+ HDBSETMSGID(db, -1);
+ ret = ENETDOWN;
+ break;
+ default:
+ /* Some unspecified error (timeout?). Abandon. */
+ ldap_msgfree(e);
+ ldap_abandon_ext(HDB2LDAP(db), msgid, NULL, NULL);
+ ret = HDB_ERR_NOENTRY;
+ HDBSETMSGID(db, -1);
+ break;
+ }
+ } while (rc == LDAP_RES_SEARCH_REFERENCE);
+
+ if (ret == 0) {
+ if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
+ ret = hdb_unseal_keys(context, db, entry);
+ if (ret)
+ hdb_free_entry(context, db, entry);
+ }
+ }
+
+ return ret;
+}
+
+static krb5_error_code
+LDAP_firstkey(krb5_context context, HDB *db, unsigned flags,
+ hdb_entry *entry)
+{
+ krb5_error_code ret;
+ int msgid;
+
+ ret = LDAP__connect(context, db);
+ if (ret)
+ return ret;
+
+ ret = LDAP_no_size_limit(context, HDB2LDAP(db));
+ if (ret)
+ return ret;
+
+ ret = ldap_search_ext(HDB2LDAP(db), HDB2BASE(db),
+ LDAP_SCOPE_SUBTREE,
+ "(|(objectClass=krb5Principal)(objectClass=sambaSamAccount))",
+ krb5kdcentry_attrs, 0,
+ NULL, NULL, NULL, 0, &msgid);
+ if (ret != LDAP_SUCCESS || msgid < 0)
+ return HDB_ERR_NOENTRY;
+
+ HDBSETMSGID(db, msgid);
+
+ return LDAP_seq(context, db, flags, entry);
+}
+
+static krb5_error_code
+LDAP_nextkey(krb5_context context, HDB * db, unsigned flags,
+ hdb_entry * entry)
+{
+ return LDAP_seq(context, db, flags, entry);
+}
+
+static krb5_error_code
+LDAP__connect(krb5_context context, HDB * db)
+{
+ int rc, version = LDAP_VERSION3;
+ /*
+ * Empty credentials to do a SASL bind with LDAP. Note that empty
+ * different from NULL credentials. If you provide NULL
+ * credentials instead of empty credentials you will get a SASL
+ * bind in progress message.
+ */
+ struct berval bv = { 0, "" };
+ const char *sasl_method = "EXTERNAL";
+ const char *bind_dn = NULL;
+
+ if (HDB2BINDDN(db) != NULL && HDB2BINDPW(db) != NULL) {
+ /* A bind DN was specified; use SASL SIMPLE */
+ bind_dn = HDB2BINDDN(db);
+ sasl_method = LDAP_SASL_SIMPLE;
+ bv.bv_val = HDB2BINDPW(db);
+ bv.bv_len = strlen(bv.bv_val);
+ }
+
+ if (HDB2LDAP(db)) {
+ /* connection has been opened. ping server. */
+ struct sockaddr_un addr;
+ socklen_t len = sizeof(addr);
+ int sd;
+
+ if (ldap_get_option(HDB2LDAP(db), LDAP_OPT_DESC, &sd) == 0 &&
+ getpeername(sd, (struct sockaddr *) &addr, &len) < 0) {
+ /* the other end has died. reopen. */
+ LDAP_close(context, db);
+ }
+ }
+
+ if (HDB2LDAP(db) != NULL) /* server is UP */
+ return 0;
+
+ rc = ldap_initialize(&((struct hdbldapdb *)db->hdb_db)->h_lp, HDB2URL(db));
+ if (rc != LDAP_SUCCESS) {
+ krb5_set_error_message(context, HDB_ERR_NOENTRY, "ldap_initialize: %s",
+ ldap_err2string(rc));
+ return HDB_ERR_NOENTRY;
+ }
+
+ rc = ldap_set_option(HDB2LDAP(db), LDAP_OPT_PROTOCOL_VERSION,
+ (const void *)&version);
+ if (rc != LDAP_SUCCESS) {
+ krb5_set_error_message(context, HDB_ERR_BADVERSION,
+ "ldap_set_option: %s", ldap_err2string(rc));
+ LDAP_close(context, db);
+ return HDB_ERR_BADVERSION;
+ }
+
+ if (((struct hdbldapdb *)db->hdb_db)->h_start_tls) {
+ rc = ldap_start_tls_s(HDB2LDAP(db), NULL, NULL);
+
+ if (rc != LDAP_SUCCESS) {
+ krb5_set_error_message(context, HDB_ERR_BADVERSION,
+ "ldap_start_tls_s: %s", ldap_err2string(rc));
+ LDAP_close(context, db);
+ return HDB_ERR_BADVERSION;
+ }
+ }
+
+ rc = ldap_sasl_bind_s(HDB2LDAP(db), bind_dn, sasl_method, &bv,
+ NULL, NULL, NULL);
+ if (rc != LDAP_SUCCESS) {
+ krb5_set_error_message(context, HDB_ERR_BADVERSION,
+ "ldap_sasl_bind_s: %s", ldap_err2string(rc));
+ LDAP_close(context, db);
+ return HDB_ERR_BADVERSION;
+ }
+
+ return 0;
+}
+
+static krb5_error_code
+LDAP_open(krb5_context context, HDB * db, int flags, mode_t mode)
+{
+ /* Not the right place for this. */
+#ifdef HAVE_SIGACTION
+ struct sigaction sa;
+
+ sa.sa_flags = 0;
+ sa.sa_handler = SIG_IGN;
+ sigemptyset(&sa.sa_mask);
+
+ sigaction(SIGPIPE, &sa, NULL);
+#else
+ signal(SIGPIPE, SIG_IGN);
+#endif /* HAVE_SIGACTION */
+
+ return LDAP__connect(context, db);
+}
+
+static krb5_error_code
+LDAP_fetch_kvno(krb5_context context, HDB * db, krb5_const_principal principal,
+ unsigned flags, krb5_kvno kvno, hdb_entry * entry)
+{
+ LDAPMessage *msg, *e;
+ krb5_error_code ret;
+
+ ret = LDAP_principal2message(context, db, principal, &msg);
+ if (ret)
+ return ret;
+
+ e = ldap_first_entry(HDB2LDAP(db), msg);
+ if (e == NULL) {
+ ret = HDB_ERR_NOENTRY;
+ goto out;
+ }
+
+ ret = LDAP_message2entry(context, db, e, flags, entry);
+ if (ret == 0) {
+ if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
+ ret = hdb_unseal_keys(context, db, entry);
+ if (ret)
+ hdb_free_entry(context, db, entry);
+ }
+ }
+
+ out:
+ ldap_msgfree(msg);
+
+ return ret;
+}
+
+#if 0
+static krb5_error_code
+LDAP_fetch(krb5_context context, HDB * db, krb5_const_principal principal,
+ unsigned flags, hdb_entry * entry)
+{
+ return LDAP_fetch_kvno(context, db, principal,
+ flags & (~HDB_F_KVNO_SPECIFIED), 0, entry);
+}
+#endif
+
+static krb5_error_code
+LDAP_store(krb5_context context, HDB * db, unsigned flags,
+ hdb_entry * entry)
+{
+ LDAPMod **mods = NULL;
+ krb5_error_code ret;
+ const char *errfn;
+ int rc;
+ LDAPMessage *msg = NULL, *e = NULL;
+ char *dn = NULL, *name = NULL;
+ krb5_boolean is_new_entry;
+
+ if ((flags & HDB_F_PRECHECK))
+ return 0; /* we can't guarantee whether we'll be able to perform it */
+
+ ret = LDAP_principal2message(context, db, entry->principal, &msg);
+ if (ret == 0)
+ e = ldap_first_entry(HDB2LDAP(db), msg);
+
+ ret = krb5_unparse_name(context, entry->principal, &name);
+ if (ret) {
+ free(name);
+ return ret;
+ }
+
+ ret = hdb_seal_keys(context, db, entry);
+ if (ret)
+ goto out;
+
+ /* turn new entry into LDAPMod array */
+ ret = LDAP_entry2mods(context, db, entry, e, &mods, &is_new_entry);
+ if (ret)
+ goto out;
+
+ if (e == NULL) {
+ ret = asprintf(&dn, "krb5PrincipalName=%s,%s", name, HDB2CREATE(db));
+ if (ret < 0) {
+ ret = ENOMEM;
+ krb5_set_error_message(context, ret, "asprintf: out of memory");
+ goto out;
+ }
+ } else if ((flags & HDB_F_REPLACE) || (is_new_entry)) {
+ /* Entry exists, and we're allowed to replace it. */
+ /* Entry may also exist but need to be modified to create a new principal. */
+ dn = ldap_get_dn(HDB2LDAP(db), e);
+ } else {
+ /* Entry exists, but we're not allowed to replace it. Bail. */
+ ret = HDB_ERR_EXISTS;
+ goto out;
+ }
+
+ /* write entry into directory */
+ if (e == NULL) {
+ /* didn't exist before */
+ rc = ldap_add_ext_s(HDB2LDAP(db), dn, mods, NULL, NULL );
+ errfn = "ldap_add_ext_s";
+ } else {
+ /* already existed, send deltas only */
+ rc = ldap_modify_ext_s(HDB2LDAP(db), dn, mods, NULL, NULL );
+ errfn = "ldap_modify_ext_s";
+ }
+
+ if (check_ldap(context, db, rc)) {
+ char *ld_error = NULL;
+ ldap_get_option(HDB2LDAP(db), LDAP_OPT_ERROR_STRING,
+ &ld_error);
+ ret = HDB_ERR_CANT_LOCK_DB;
+ krb5_set_error_message(context, ret, "%s: %s (DN=%s) %s: %s",
+ errfn, name, dn, ldap_err2string(rc), ld_error);
+ } else
+ ret = 0;
+
+ out:
+ /* free stuff */
+ if (dn)
+ free(dn);
+ if (msg)
+ ldap_msgfree(msg);
+ if (mods)
+ ldap_mods_free(mods, 1);
+ if (name)
+ free(name);
+
+ return ret;
+}
+
+static krb5_error_code
+LDAP_remove(krb5_context context, HDB *db,
+ unsigned flags, krb5_const_principal principal)
+{
+ krb5_error_code ret;
+ LDAPMessage *msg, *e;
+ char *dn = NULL;
+ int rc, limit = LDAP_NO_LIMIT;
+
+ if ((flags & HDB_F_PRECHECK))
+ return 0; /* we can't guarantee whether we'll be able to perform it */
+
+ ret = LDAP_principal2message(context, db, principal, &msg);
+ if (ret)
+ goto out;
+
+ e = ldap_first_entry(HDB2LDAP(db), msg);
+ if (e == NULL) {
+ ret = HDB_ERR_NOENTRY;
+ goto out;
+ }
+
+ dn = ldap_get_dn(HDB2LDAP(db), e);
+ if (dn == NULL) {
+ ret = HDB_ERR_NOENTRY;
+ goto out;
+ }
+
+ rc = ldap_set_option(HDB2LDAP(db), LDAP_OPT_SIZELIMIT, (const void *)&limit);
+ if (rc != LDAP_SUCCESS) {
+ ret = HDB_ERR_BADVERSION;
+ krb5_set_error_message(context, ret, "ldap_set_option: %s",
+ ldap_err2string(rc));
+ goto out;
+ }
+
+ /* HACK: This should check if we need to delete the object or just some attributes */
+
+ rc = ldap_delete_ext_s(HDB2LDAP(db), dn, NULL, NULL );
+ if (check_ldap(context, db, rc)) {
+ ret = HDB_ERR_CANT_LOCK_DB;
+ krb5_set_error_message(context, ret, "ldap_delete_ext_s: %s",
+ ldap_err2string(rc));
+ } else
+ ret = 0;
+
+ out:
+ if (dn != NULL)
+ free(dn);
+ if (msg != NULL)
+ ldap_msgfree(msg);
+
+ return ret;
+}
+
+static krb5_error_code
+LDAP_destroy(krb5_context context, HDB * db)
+{
+ krb5_error_code ret;
+
+ LDAP_close(context, db);
+
+ ret = hdb_clear_master_key(context, db);
+ if (HDB2BASE(db))
+ free(HDB2BASE(db));
+ if (HDB2CREATE(db))
+ free(HDB2CREATE(db));
+ if (HDB2URL(db))
+ free(HDB2URL(db));
+ krb5_config_free_strings(db->virtual_hostbased_princ_svcs);
+ if (db->hdb_name)
+ free(db->hdb_name);
+ free(db->hdb_db);
+ free(db);
+
+ return ret;
+}
+
+static krb5_error_code
+LDAP_set_sync(krb5_context context, HDB * db, int on)
+{
+ (void)on;
+ return 0;
+}
+
+static krb5_error_code
+hdb_ldap_common(krb5_context context,
+ HDB ** db,
+ const char *search_base,
+ const char *url)
+{
+ struct hdbldapdb *h;
+ const char *create_base = NULL;
+ const char *ldap_secret_file = NULL;
+
+ if (url == NULL || url[0] == '\0') {
+ const char *p;
+ p = krb5_config_get_string(context, NULL, "kdc",
+ "hdb-ldap-url", NULL);
+ if (p == NULL)
+ p = default_ldap_url;
+
+ url = p;
+ }
+
+ if (search_base == NULL || search_base[0] == '\0') {
+ krb5_set_error_message(context, ENOMEM, "ldap search base not configured");
+ return ENOMEM; /* XXX */
+ }
+
+ if (structural_object == NULL) {
+ const char *p;
+
+ p = krb5_config_get_string(context, NULL, "kdc",
+ "hdb-ldap-structural-object", NULL);
+ if (p == NULL)
+ p = default_structural_object;
+ structural_object = strdup(p);
+ if (structural_object == NULL) {
+ krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
+ return ENOMEM;
+ }
+ }
+
+ samba_forwardable =
+ krb5_config_get_bool_default(context, NULL, TRUE,
+ "kdc", "hdb-samba-forwardable", NULL);
+
+ *db = calloc(1, sizeof(**db));
+ if (*db == NULL) {
+ krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
+ return ENOMEM;
+ }
+ memset(*db, 0, sizeof(**db));
+
+ h = calloc(1, sizeof(*h));
+ if (h == NULL) {
+ free(*db);
+ *db = NULL;
+ krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
+ return ENOMEM;
+ }
+ (*db)->hdb_db = h;
+
+ /* XXX */
+ if (asprintf(&(*db)->hdb_name, "ldap:%s", search_base) == -1) {
+ LDAP_destroy(context, *db);
+ *db = NULL;
+ krb5_set_error_message(context, ENOMEM, "strdup: out of memory");
+ return ENOMEM;
+ }
+
+ h->h_url = strdup(url);
+ h->h_base = strdup(search_base);
+ if (h->h_url == NULL || h->h_base == NULL) {
+ LDAP_destroy(context, *db);
+ *db = NULL;
+ krb5_set_error_message(context, ENOMEM, "strdup: out of memory");
+ return ENOMEM;
+ }
+
+ ldap_secret_file = krb5_config_get_string(context, NULL, "kdc",
+ "hdb-ldap-secret-file", NULL);
+ if (ldap_secret_file != NULL) {
+ krb5_config_binding *tmp;
+ krb5_error_code ret;
+ const char *p;
+
+ ret = krb5_config_parse_file(context, ldap_secret_file, &tmp);
+ if (ret)
+ return ret;
+
+ p = krb5_config_get_string(context, tmp, "kdc",
+ "hdb-ldap-bind-dn", NULL);
+ if (p != NULL)
+ h->h_bind_dn = strdup(p);
+
+ p = krb5_config_get_string(context, tmp, "kdc",
+ "hdb-ldap-bind-password", NULL);
+ if (p != NULL)
+ h->h_bind_password = strdup(p);
+
+ krb5_config_file_free(context, tmp);
+ }
+
+ h->h_start_tls =
+ krb5_config_get_bool_default(context, NULL, FALSE,
+ "kdc", "hdb-ldap-start-tls", NULL);
+
+ create_base = krb5_config_get_string(context, NULL, "kdc",
+ "hdb-ldap-create-base", NULL);
+ if (create_base == NULL)
+ create_base = h->h_base;
+
+ h->h_createbase = strdup(create_base);
+ if (h->h_createbase == NULL) {
+ LDAP_destroy(context, *db);
+ *db = NULL;
+ krb5_set_error_message(context, ENOMEM, "strdup: out of memory");
+ return ENOMEM;
+ }
+
+ (*db)->hdb_master_key_set = 0;
+ (*db)->hdb_openp = 0;
+ (*db)->hdb_capability_flags = HDB_CAP_F_SHARED_DIRECTORY;
+ (*db)->hdb_open = LDAP_open;
+ (*db)->hdb_close = LDAP_close;
+ (*db)->hdb_fetch_kvno = LDAP_fetch_kvno;
+ (*db)->hdb_store = LDAP_store;
+ (*db)->hdb_remove = LDAP_remove;
+ (*db)->hdb_firstkey = LDAP_firstkey;
+ (*db)->hdb_nextkey = LDAP_nextkey;
+ (*db)->hdb_lock = LDAP_lock;
+ (*db)->hdb_unlock = LDAP_unlock;
+ (*db)->hdb_rename = NULL;
+ (*db)->hdb__get = NULL;
+ (*db)->hdb__put = NULL;
+ (*db)->hdb__del = NULL;
+ (*db)->hdb_destroy = LDAP_destroy;
+ (*db)->hdb_set_sync = LDAP_set_sync;
+
+ return 0;
+}
+
+#ifdef OPENLDAP_MODULE
+static
+#endif
+
+krb5_error_code
+hdb_ldap_create(krb5_context context, HDB ** db, const char *arg)
+{
+ return hdb_ldap_common(context, db, arg, NULL);
+}
+
+#ifdef OPENLDAP_MODULE
+static
+#endif
+
+krb5_error_code
+hdb_ldapi_create(krb5_context context, HDB ** db, const char *arg)
+{
+ krb5_error_code ret;
+ char *search_base, *p;
+
+ if (asprintf(&p, "ldapi:%s", arg) == -1 || p == NULL) {
+ *db = NULL;
+ krb5_set_error_message(context, ENOMEM, "out of memory");
+ return ENOMEM;
+ }
+ search_base = strchr(p + strlen("ldapi://"), ':');
+ if (search_base == NULL) {
+ *db = NULL;
+ krb5_set_error_message(context, HDB_ERR_BADVERSION,
+ "search base missing");
+ return HDB_ERR_BADVERSION;
+ }
+ *search_base = '\0';
+ search_base++;
+
+ ret = hdb_ldap_common(context, db, search_base, p);
+ free(p);
+ return ret;
+}
+
+#ifdef OPENLDAP_MODULE
+static krb5_error_code
+init(krb5_context context, void **ctx)
+{
+ *ctx = NULL;
+ return 0;
+}
+
+static void
+fini(void *ctx)
+{
+}
+
+struct hdb_method hdb_ldap_interface = {
+ HDB_INTERFACE_VERSION,
+ init,
+ fini,
+ 0 /*is_file_based*/, 0 /*can_taste*/,
+ "ldap",
+ hdb_ldap_create
+};
+
+struct hdb_method hdb_ldapi_interface = {
+ HDB_INTERFACE_VERSION,
+ init,
+ fini,
+ 0 /*is_file_based*/, 0 /*can_taste*/,
+ "ldapi",
+ hdb_ldapi_create
+};
+#endif
+
+#endif /* OPENLDAP */
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-08 23:13:19 +0000