2 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
13 #include <openssl/conf.h>
14 #include <openssl/ct.h>
15 #include <openssl/err.h>
16 #include <openssl/evp.h>
17 #include <openssl/safestack.h>
19 #include "internal/cryptlib.h"
22 * Information about a CT log server.
26 uint8_t log_id[CT_V1_HASHLEN];
31 * A store for multiple CTLOG instances.
32 * It takes ownership of any CTLOG instances added to it.
34 struct ctlog_store_st {
35 STACK_OF(CTLOG) *logs;
38 /* The context when loading a CT log list from a CONF file. */
39 typedef struct ctlog_store_load_ctx_st {
40 CTLOG_STORE *log_store;
42 size_t invalid_log_entries;
43 } CTLOG_STORE_LOAD_CTX;
46 * Creates an empty context for loading a CT log store.
47 * It should be populated before use.
49 static CTLOG_STORE_LOAD_CTX *ctlog_store_load_ctx_new();
52 * Deletes a CT log store load context.
53 * Does not delete any of the fields.
55 static void ctlog_store_load_ctx_free(CTLOG_STORE_LOAD_CTX* ctx);
57 static CTLOG_STORE_LOAD_CTX *ctlog_store_load_ctx_new()
59 CTLOG_STORE_LOAD_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
62 CTerr(CT_F_CTLOG_STORE_LOAD_CTX_NEW, ERR_R_MALLOC_FAILURE);
68 ctlog_store_load_ctx_free(ctx);
72 static void ctlog_store_load_ctx_free(CTLOG_STORE_LOAD_CTX* ctx)
77 /* Converts a log's public key into a SHA256 log ID */
78 static int ct_v1_log_id_from_pkey(EVP_PKEY *pkey,
79 unsigned char log_id[CT_V1_HASHLEN])
82 unsigned char *pkey_der = NULL;
83 int pkey_der_len = i2d_PUBKEY(pkey, &pkey_der);
85 if (pkey_der_len <= 0) {
86 CTerr(CT_F_CT_V1_LOG_ID_FROM_PKEY, CT_R_LOG_KEY_INVALID);
90 SHA256(pkey_der, pkey_der_len, log_id);
93 OPENSSL_free(pkey_der);
97 CTLOG_STORE *CTLOG_STORE_new(void)
99 CTLOG_STORE *ret = OPENSSL_zalloc(sizeof(*ret));
104 ret->logs = sk_CTLOG_new_null();
105 if (ret->logs == NULL)
110 CTLOG_STORE_free(ret);
114 void CTLOG_STORE_free(CTLOG_STORE *store)
117 sk_CTLOG_pop_free(store->logs, CTLOG_free);
122 static CTLOG *ctlog_new_from_conf(const CONF *conf, const char *section)
125 char *description = NCONF_get_string(conf, section, "description");
128 if (description == NULL) {
129 CTerr(CT_F_CTLOG_NEW_FROM_CONF, CT_R_LOG_CONF_MISSING_DESCRIPTION);
133 pkey_base64 = NCONF_get_string(conf, section, "key");
134 if (pkey_base64 == NULL) {
135 CTerr(CT_F_CTLOG_NEW_FROM_CONF, CT_R_LOG_CONF_MISSING_KEY);
139 ret = CTLOG_new_from_base64(pkey_base64, description);
141 CTerr(CT_F_CTLOG_NEW_FROM_CONF, CT_R_LOG_CONF_INVALID);
149 int CTLOG_STORE_load_default_file(CTLOG_STORE *store)
151 const char *fpath = getenv(CTLOG_FILE_EVP);
156 return CTLOG_STORE_load_file(store, fpath);
160 * Called by CONF_parse_list, which stops if this returns <= 0, so don't unless
161 * something very bad happens. Otherwise, one bad log entry would stop loading
162 * of any of the following log entries.
164 static int ctlog_store_load_log(const char *log_name, int log_name_len,
167 CTLOG_STORE_LOAD_CTX *load_ctx = arg;
169 /* log_name may not be null-terminated, so fix that before using it */
172 /* log_name will be NULL for empty list entries */
173 if (log_name == NULL)
176 tmp = OPENSSL_strndup(log_name, log_name_len);
177 ct_log = ctlog_new_from_conf(load_ctx->conf, tmp);
179 if (ct_log == NULL) {
180 /* If we can't load this log, record that fact and skip it */
181 ++load_ctx->invalid_log_entries;
185 sk_CTLOG_push(load_ctx->log_store->logs, ct_log);
189 int CTLOG_STORE_load_file(CTLOG_STORE *store, const char *file)
193 CTLOG_STORE_LOAD_CTX* load_ctx = ctlog_store_load_ctx_new();
195 load_ctx->log_store = store;
196 load_ctx->conf = NCONF_new(NULL);
197 if (load_ctx->conf == NULL)
200 if (NCONF_load(load_ctx->conf, file, NULL) <= 0) {
201 CTerr(CT_F_CTLOG_STORE_LOAD_FILE, CT_R_LOG_CONF_INVALID);
205 enabled_logs = NCONF_get_string(load_ctx->conf, NULL, "enabled_logs");
206 if (enabled_logs == NULL) {
207 CTerr(CT_F_CTLOG_STORE_LOAD_FILE, CT_R_LOG_CONF_INVALID);
211 if (!CONF_parse_list(enabled_logs, ',', 1, ctlog_store_load_log, load_ctx) ||
212 load_ctx->invalid_log_entries > 0) {
213 CTerr(CT_F_CTLOG_STORE_LOAD_FILE, CT_R_LOG_CONF_INVALID);
219 NCONF_free(load_ctx->conf);
220 ctlog_store_load_ctx_free(load_ctx);
225 * Initialize a new CTLOG object.
226 * Takes ownership of the public key.
229 CTLOG *CTLOG_new(EVP_PKEY *public_key, const char *name)
231 CTLOG *ret = CTLOG_new_null();
236 ret->name = OPENSSL_strdup(name);
237 if (ret->name == NULL)
240 ret->public_key = public_key;
241 if (ct_v1_log_id_from_pkey(public_key, ret->log_id) != 1)
250 CTLOG *CTLOG_new_null(void)
252 CTLOG *ret = OPENSSL_zalloc(sizeof(*ret));
255 CTerr(CT_F_CTLOG_NEW_NULL, ERR_R_MALLOC_FAILURE);
260 /* Frees CT log and associated structures */
261 void CTLOG_free(CTLOG *log)
264 OPENSSL_free(log->name);
265 EVP_PKEY_free(log->public_key);
270 const char *CTLOG_get0_name(const CTLOG *log)
275 void CTLOG_get0_log_id(const CTLOG *log, const uint8_t **log_id,
278 *log_id = log->log_id;
279 *log_id_len = CT_V1_HASHLEN;
282 EVP_PKEY *CTLOG_get0_public_key(const CTLOG *log)
284 return log->public_key;
288 * Given a log ID, finds the matching log.
289 * Returns NULL if no match found.
291 const CTLOG *CTLOG_STORE_get0_log_by_id(const CTLOG_STORE *store,
292 const uint8_t *log_id,
297 for (i = 0; i < sk_CTLOG_num(store->logs); ++i) {
298 const CTLOG *log = sk_CTLOG_value(store->logs, i);
299 if (memcmp(log->log_id, log_id, log_id_len) == 0)