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Diffstat (limited to 'source4/heimdal/lib/krb5/salt.c')
-rw-r--r--source4/heimdal/lib/krb5/salt.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/source4/heimdal/lib/krb5/salt.c b/source4/heimdal/lib/krb5/salt.c
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+++ b/source4/heimdal/lib/krb5/salt.c
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+/*
+ * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * 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 the Institute 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 THE INSTITUTE 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 THE INSTITUTE 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 "krb5_locl.h"
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_salttype_to_string (krb5_context context,
+ krb5_enctype etype,
+ krb5_salttype stype,
+ char **string)
+{
+ struct encryption_type *e;
+ struct salt_type *st;
+
+ e = _krb5_find_enctype (etype);
+ if (e == NULL) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ "encryption type %d not supported",
+ etype);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+ for (st = e->keytype->string_to_key; st && st->type; st++) {
+ if (st->type == stype) {
+ *string = strdup (st->name);
+ if (*string == NULL) {
+ krb5_set_error_message (context, ENOMEM,
+ N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+ return 0;
+ }
+ }
+ krb5_set_error_message (context, HEIM_ERR_SALTTYPE_NOSUPP,
+ "salttype %d not supported", stype);
+ return HEIM_ERR_SALTTYPE_NOSUPP;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_string_to_salttype (krb5_context context,
+ krb5_enctype etype,
+ const char *string,
+ krb5_salttype *salttype)
+{
+ struct encryption_type *e;
+ struct salt_type *st;
+
+ e = _krb5_find_enctype (etype);
+ if (e == NULL) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ etype);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+ for (st = e->keytype->string_to_key; st && st->type; st++) {
+ if (strcasecmp (st->name, string) == 0) {
+ *salttype = st->type;
+ return 0;
+ }
+ }
+ krb5_set_error_message(context, HEIM_ERR_SALTTYPE_NOSUPP,
+ N_("salttype %s not supported", ""), string);
+ return HEIM_ERR_SALTTYPE_NOSUPP;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_get_pw_salt(krb5_context context,
+ krb5_const_principal principal,
+ krb5_salt *salt)
+{
+ size_t len;
+ int i;
+ krb5_error_code ret;
+ char *p;
+
+ salt->salttype = KRB5_PW_SALT;
+ len = strlen(principal->realm);
+ for (i = 0; i < principal->name.name_string.len; ++i)
+ len += strlen(principal->name.name_string.val[i]);
+ ret = krb5_data_alloc (&salt->saltvalue, len);
+ if (ret)
+ return ret;
+ p = salt->saltvalue.data;
+ memcpy (p, principal->realm, strlen(principal->realm));
+ p += strlen(principal->realm);
+ for (i = 0; i < principal->name.name_string.len; ++i) {
+ memcpy (p,
+ principal->name.name_string.val[i],
+ strlen(principal->name.name_string.val[i]));
+ p += strlen(principal->name.name_string.val[i]);
+ }
+ return 0;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_free_salt(krb5_context context,
+ krb5_salt salt)
+{
+ krb5_data_free(&salt.saltvalue);
+ return 0;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_string_to_key_data (krb5_context context,
+ krb5_enctype enctype,
+ krb5_data password,
+ krb5_principal principal,
+ krb5_keyblock *key)
+{
+ krb5_error_code ret;
+ krb5_salt salt;
+
+ ret = krb5_get_pw_salt(context, principal, &salt);
+ if(ret)
+ return ret;
+ ret = krb5_string_to_key_data_salt(context, enctype, password, salt, key);
+ krb5_free_salt(context, salt);
+ return ret;
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_string_to_key (krb5_context context,
+ krb5_enctype enctype,
+ const char *password,
+ krb5_principal principal,
+ krb5_keyblock *key)
+{
+ krb5_data pw;
+ pw.data = rk_UNCONST(password);
+ pw.length = strlen(password);
+ return krb5_string_to_key_data(context, enctype, pw, principal, key);
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_string_to_key_data_salt (krb5_context context,
+ krb5_enctype enctype,
+ krb5_data password,
+ krb5_salt salt,
+ krb5_keyblock *key)
+{
+ krb5_data opaque;
+ krb5_data_zero(&opaque);
+ return krb5_string_to_key_data_salt_opaque(context, enctype, password,
+ salt, opaque, key);
+}
+
+/*
+ * Do a string -> key for encryption type `enctype' operation on
+ * `password' (with salt `salt' and the enctype specific data string
+ * `opaque'), returning the resulting key in `key'
+ */
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_string_to_key_data_salt_opaque (krb5_context context,
+ krb5_enctype enctype,
+ krb5_data password,
+ krb5_salt salt,
+ krb5_data opaque,
+ krb5_keyblock *key)
+{
+ struct encryption_type *et =_krb5_find_enctype(enctype);
+ struct salt_type *st;
+ if(et == NULL) {
+ krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ enctype);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+ for(st = et->keytype->string_to_key; st && st->type; st++)
+ if(st->type == salt.salttype)
+ return (*st->string_to_key)(context, enctype, password,
+ salt, opaque, key);
+ krb5_set_error_message(context, HEIM_ERR_SALTTYPE_NOSUPP,
+ N_("salt type %d not supported", ""),
+ salt.salttype);
+ return HEIM_ERR_SALTTYPE_NOSUPP;
+}
+
+/*
+ * Do a string -> key for encryption type `enctype' operation on the
+ * string `password' (with salt `salt'), returning the resulting key
+ * in `key'
+ */
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_string_to_key_salt (krb5_context context,
+ krb5_enctype enctype,
+ const char *password,
+ krb5_salt salt,
+ krb5_keyblock *key)
+{
+ krb5_data pw;
+ pw.data = rk_UNCONST(password);
+ pw.length = strlen(password);
+ return krb5_string_to_key_data_salt(context, enctype, pw, salt, key);
+}
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_string_to_key_salt_opaque (krb5_context context,
+ krb5_enctype enctype,
+ const char *password,
+ krb5_salt salt,
+ krb5_data opaque,
+ krb5_keyblock *key)
+{
+ krb5_data pw;
+ pw.data = rk_UNCONST(password);
+ pw.length = strlen(password);
+ return krb5_string_to_key_data_salt_opaque(context, enctype,
+ pw, salt, opaque, key);
+}
+
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_string_to_key_derived(krb5_context context,
+ const void *str,
+ size_t len,
+ krb5_enctype etype,
+ krb5_keyblock *key)
+{
+ struct encryption_type *et = _krb5_find_enctype(etype);
+ krb5_error_code ret;
+ struct key_data kd;
+ size_t keylen;
+ u_char *tmp;
+
+ if(et == NULL) {
+ krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
+ N_("encryption type %d not supported", ""),
+ etype);
+ return KRB5_PROG_ETYPE_NOSUPP;
+ }
+ keylen = et->keytype->bits / 8;
+
+ ALLOC(kd.key, 1);
+ if(kd.key == NULL) {
+ krb5_set_error_message (context, ENOMEM,
+ N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+ ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
+ if(ret) {
+ free(kd.key);
+ return ret;
+ }
+ kd.key->keytype = etype;
+ tmp = malloc (keylen);
+ if(tmp == NULL) {
+ krb5_free_keyblock(context, kd.key);
+ krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
+ return ENOMEM;
+ }
+ ret = _krb5_n_fold(str, len, tmp, keylen);
+ if (ret) {
+ free(tmp);
+ krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
+ return ret;
+ }
+ kd.schedule = NULL;
+ _krb5_DES3_random_to_key(context, kd.key, tmp, keylen);
+ memset(tmp, 0, keylen);
+ free(tmp);
+ ret = _krb5_derive_key(context,
+ et,
+ &kd,
+ "kerberos", /* XXX well known constant */
+ strlen("kerberos"));
+ if (ret) {
+ _krb5_free_key_data(context, &kd, et);
+ return ret;
+ }
+ ret = krb5_copy_keyblock_contents(context, kd.key, key);
+ _krb5_free_key_data(context, &kd, et);
+ return ret;
+}
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