2 * Copyright 2016-2018 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(void)
59 CTLOG_STORE_LOAD_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
62 CTerr(CT_F_CTLOG_STORE_LOAD_CTX_NEW, ERR_R_MALLOC_FAILURE);
67 static void ctlog_store_load_ctx_free(CTLOG_STORE_LOAD_CTX* ctx)
72 /* Converts a log's public key into a SHA256 log ID */
73 static int ct_v1_log_id_from_pkey(EVP_PKEY *pkey,
74 unsigned char log_id[CT_V1_HASHLEN])
77 unsigned char *pkey_der = NULL;
78 int pkey_der_len = i2d_PUBKEY(pkey, &pkey_der);
80 if (pkey_der_len <= 0) {
81 CTerr(CT_F_CT_V1_LOG_ID_FROM_PKEY, CT_R_LOG_KEY_INVALID);
85 SHA256(pkey_der, pkey_der_len, log_id);
88 OPENSSL_free(pkey_der);
92 CTLOG_STORE *CTLOG_STORE_new(void)
94 CTLOG_STORE *ret = OPENSSL_zalloc(sizeof(*ret));
97 CTerr(CT_F_CTLOG_STORE_NEW, ERR_R_MALLOC_FAILURE);
101 ret->logs = sk_CTLOG_new_null();
102 if (ret->logs == NULL)
111 void CTLOG_STORE_free(CTLOG_STORE *store)
114 sk_CTLOG_pop_free(store->logs, CTLOG_free);
119 static int ctlog_new_from_conf(CTLOG **ct_log, const CONF *conf, const char *section)
121 const char *description = NCONF_get_string(conf, section, "description");
124 if (description == NULL) {
125 CTerr(CT_F_CTLOG_NEW_FROM_CONF, CT_R_LOG_CONF_MISSING_DESCRIPTION);
129 pkey_base64 = NCONF_get_string(conf, section, "key");
130 if (pkey_base64 == NULL) {
131 CTerr(CT_F_CTLOG_NEW_FROM_CONF, CT_R_LOG_CONF_MISSING_KEY);
135 return CTLOG_new_from_base64(ct_log, pkey_base64, description);
138 int CTLOG_STORE_load_default_file(CTLOG_STORE *store)
140 const char *fpath = getenv(CTLOG_FILE_EVP);
145 return CTLOG_STORE_load_file(store, fpath);
149 * Called by CONF_parse_list, which stops if this returns <= 0,
150 * Otherwise, one bad log entry would stop loading of any of
151 * the following log entries.
152 * It may stop parsing and returns -1 on any internal (malloc) error.
154 static int ctlog_store_load_log(const char *log_name, int log_name_len,
157 CTLOG_STORE_LOAD_CTX *load_ctx = arg;
158 CTLOG *ct_log = NULL;
159 /* log_name may not be null-terminated, so fix that before using it */
163 /* log_name will be NULL for empty list entries */
164 if (log_name == NULL)
167 tmp = OPENSSL_strndup(log_name, log_name_len);
171 ret = ctlog_new_from_conf(&ct_log, load_ctx->conf, tmp);
175 /* Propagate any internal error */
179 /* If we can't load this log, record that fact and skip it */
180 ++load_ctx->invalid_log_entries;
184 if (!sk_CTLOG_push(load_ctx->log_store->logs, ct_log)) {
191 CTerr(CT_F_CTLOG_STORE_LOAD_LOG, ERR_R_MALLOC_FAILURE);
195 int CTLOG_STORE_load_file(CTLOG_STORE *store, const char *file)
199 CTLOG_STORE_LOAD_CTX* load_ctx = ctlog_store_load_ctx_new();
201 if (load_ctx == NULL)
203 load_ctx->log_store = store;
204 load_ctx->conf = NCONF_new(NULL);
205 if (load_ctx->conf == NULL)
208 if (NCONF_load(load_ctx->conf, file, NULL) <= 0) {
209 CTerr(CT_F_CTLOG_STORE_LOAD_FILE, CT_R_LOG_CONF_INVALID);
213 enabled_logs = NCONF_get_string(load_ctx->conf, NULL, "enabled_logs");
214 if (enabled_logs == NULL) {
215 CTerr(CT_F_CTLOG_STORE_LOAD_FILE, CT_R_LOG_CONF_INVALID);
219 if (!CONF_parse_list(enabled_logs, ',', 1, ctlog_store_load_log, load_ctx) ||
220 load_ctx->invalid_log_entries > 0) {
221 CTerr(CT_F_CTLOG_STORE_LOAD_FILE, CT_R_LOG_CONF_INVALID);
227 NCONF_free(load_ctx->conf);
228 ctlog_store_load_ctx_free(load_ctx);
233 * Initialize a new CTLOG object.
234 * Takes ownership of the public key.
237 CTLOG *CTLOG_new(EVP_PKEY *public_key, const char *name)
239 CTLOG *ret = OPENSSL_zalloc(sizeof(*ret));
242 CTerr(CT_F_CTLOG_NEW, ERR_R_MALLOC_FAILURE);
246 ret->name = OPENSSL_strdup(name);
247 if (ret->name == NULL) {
248 CTerr(CT_F_CTLOG_NEW, ERR_R_MALLOC_FAILURE);
252 if (ct_v1_log_id_from_pkey(public_key, ret->log_id) != 1)
255 ret->public_key = public_key;
262 /* Frees CT log and associated structures */
263 void CTLOG_free(CTLOG *log)
266 OPENSSL_free(log->name);
267 EVP_PKEY_free(log->public_key);
272 const char *CTLOG_get0_name(const CTLOG *log)
277 void CTLOG_get0_log_id(const CTLOG *log, const uint8_t **log_id,
280 *log_id = log->log_id;
281 *log_id_len = CT_V1_HASHLEN;
284 EVP_PKEY *CTLOG_get0_public_key(const CTLOG *log)
286 return log->public_key;
290 * Given a log ID, finds the matching log.
291 * Returns NULL if no match found.
293 const CTLOG *CTLOG_STORE_get0_log_by_id(const CTLOG_STORE *store,
294 const uint8_t *log_id,
299 for (i = 0; i < sk_CTLOG_num(store->logs); ++i) {
300 const CTLOG *log = sk_CTLOG_value(store->logs, i);
301 if (memcmp(log->log_id, log_id, log_id_len) == 0)