1 /* Author: Adam Eijdenberg <adam.eijdenberg@gmail.com>. */
2 /* ====================================================================
3 * Copyright (c) 1998-2016 The OpenSSL Project. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * openssl-core@openssl.org.
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
31 * 6. Redistributions of any form whatsoever must retain the following
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
50 * This product includes cryptographic software written by Eric Young
51 * (eay@cryptsoft.com). This product includes software written by Tim
52 * Hudson (tjh@cryptsoft.com).
59 #include <openssl/conf.h>
60 #include <openssl/ct.h>
61 #include <openssl/err.h>
62 #include <openssl/evp.h>
63 #include <openssl/safestack.h>
65 #include "internal/cryptlib.h"
68 * Information about a CT log server.
72 uint8_t log_id[CT_V1_HASHLEN];
77 * A store for multiple CTLOG instances.
78 * It takes ownership of any CTLOG instances added to it.
80 struct ctlog_store_st {
81 STACK_OF(CTLOG) *logs;
84 /* The context when loading a CT log list from a CONF file. */
85 typedef struct ctlog_store_load_ctx_st {
86 CTLOG_STORE *log_store;
88 size_t invalid_log_entries;
89 } CTLOG_STORE_LOAD_CTX;
92 * Creates an empty context for loading a CT log store.
93 * It should be populated before use.
95 static CTLOG_STORE_LOAD_CTX *ctlog_store_load_ctx_new();
98 * Deletes a CT log store load context.
99 * Does not delete any of the fields.
101 static void ctlog_store_load_ctx_free(CTLOG_STORE_LOAD_CTX* ctx);
103 static CTLOG_STORE_LOAD_CTX *ctlog_store_load_ctx_new()
105 CTLOG_STORE_LOAD_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
108 CTerr(CT_F_CTLOG_STORE_LOAD_CTX_NEW, ERR_R_MALLOC_FAILURE);
114 ctlog_store_load_ctx_free(ctx);
118 static void ctlog_store_load_ctx_free(CTLOG_STORE_LOAD_CTX* ctx)
123 /* Converts a log's public key into a SHA256 log ID */
124 static int ct_v1_log_id_from_pkey(EVP_PKEY *pkey,
125 unsigned char log_id[CT_V1_HASHLEN])
128 unsigned char *pkey_der = NULL;
129 int pkey_der_len = i2d_PUBKEY(pkey, &pkey_der);
131 if (pkey_der_len <= 0) {
132 CTerr(CT_F_CT_V1_LOG_ID_FROM_PKEY, CT_R_LOG_KEY_INVALID);
136 SHA256(pkey_der, pkey_der_len, log_id);
139 OPENSSL_free(pkey_der);
143 CTLOG_STORE *CTLOG_STORE_new(void)
145 CTLOG_STORE *ret = OPENSSL_zalloc(sizeof(*ret));
150 ret->logs = sk_CTLOG_new_null();
151 if (ret->logs == NULL)
156 CTLOG_STORE_free(ret);
160 void CTLOG_STORE_free(CTLOG_STORE *store)
163 sk_CTLOG_pop_free(store->logs, CTLOG_free);
168 static CTLOG *ctlog_new_from_conf(const CONF *conf, const char *section)
171 char *description = NCONF_get_string(conf, section, "description");
174 if (description == NULL) {
175 CTerr(CT_F_CTLOG_NEW_FROM_CONF, CT_R_LOG_CONF_MISSING_DESCRIPTION);
179 pkey_base64 = NCONF_get_string(conf, section, "key");
180 if (pkey_base64 == NULL) {
181 CTerr(CT_F_CTLOG_NEW_FROM_CONF, CT_R_LOG_CONF_MISSING_KEY);
185 ret = CTLOG_new_from_base64(pkey_base64, description);
187 CTerr(CT_F_CTLOG_NEW_FROM_CONF, CT_R_LOG_CONF_INVALID);
195 int CTLOG_STORE_load_default_file(CTLOG_STORE *store)
197 const char *fpath = getenv(CTLOG_FILE_EVP);
202 return CTLOG_STORE_load_file(store, fpath);
206 * Called by CONF_parse_list, which stops if this returns <= 0, so don't unless
207 * something very bad happens. Otherwise, one bad log entry would stop loading
208 * of any of the following log entries.
210 static int ctlog_store_load_log(const char *log_name, int log_name_len,
213 CTLOG_STORE_LOAD_CTX *load_ctx = arg;
215 /* log_name may not be null-terminated, so fix that before using it */
216 char *tmp = OPENSSL_strndup(log_name, log_name_len);
218 ct_log = ctlog_new_from_conf(load_ctx->conf, tmp);
220 if (ct_log == NULL) {
221 /* If we can't load this log, record that fact and skip it */
222 ++load_ctx->invalid_log_entries;
226 sk_CTLOG_push(load_ctx->log_store->logs, ct_log);
230 int CTLOG_STORE_load_file(CTLOG_STORE *store, const char *file)
234 CTLOG_STORE_LOAD_CTX* load_ctx = ctlog_store_load_ctx_new();
236 load_ctx->log_store = store;
237 load_ctx->conf = NCONF_new(NULL);
238 if (load_ctx->conf == NULL)
241 ret = NCONF_load(load_ctx->conf, file, NULL);
243 CTerr(CT_F_CTLOG_STORE_LOAD_FILE, CT_R_LOG_CONF_INVALID);
247 enabled_logs = NCONF_get_string(load_ctx->conf, NULL, "enabled_logs");
248 ret = CONF_parse_list(enabled_logs, ',', 1, ctlog_store_load_log, load_ctx);
249 if (ret == 1 && load_ctx->invalid_log_entries > 0) {
251 CTerr(CT_F_CTLOG_STORE_LOAD_FILE, CT_R_LOG_CONF_INVALID);
256 NCONF_free(load_ctx->conf);
257 ctlog_store_load_ctx_free(load_ctx);
262 * Initialize a new CTLOG object.
263 * Takes ownership of the public key.
266 CTLOG *CTLOG_new(EVP_PKEY *public_key, const char *name)
268 CTLOG *ret = CTLOG_new_null();
273 ret->name = OPENSSL_strdup(name);
274 if (ret->name == NULL)
277 ret->public_key = public_key;
278 if (ct_v1_log_id_from_pkey(public_key, ret->log_id) != 1)
287 CTLOG *CTLOG_new_null(void)
289 CTLOG *ret = OPENSSL_zalloc(sizeof(*ret));
292 CTerr(CT_F_CTLOG_NEW_NULL, ERR_R_MALLOC_FAILURE);
297 /* Frees CT log and associated structures */
298 void CTLOG_free(CTLOG *log)
301 OPENSSL_free(log->name);
302 EVP_PKEY_free(log->public_key);
307 const char *CTLOG_get0_name(CTLOG *log)
312 void CTLOG_get0_log_id(CTLOG *log, uint8_t **log_id, size_t *log_id_len)
314 *log_id = log->log_id;
315 *log_id_len = CT_V1_HASHLEN;
318 EVP_PKEY *CTLOG_get0_public_key(CTLOG *log)
320 return log->public_key;
324 * Given a log ID, finds the matching log.
325 * Returns NULL if no match found.
327 CTLOG *CTLOG_STORE_get0_log_by_id(const CTLOG_STORE *store,
328 const uint8_t *log_id,
333 for (i = 0; i < sk_CTLOG_num(store->logs); ++i) {
334 CTLOG *log = sk_CTLOG_value(store->logs, i);
335 if (memcmp(log->log_id, log_id, log_id_len) == 0)