2 * Written by Rob Stradling (rob@comodo.com) and Stephen Henson
3 * (steve@openssl.org) for the OpenSSL project 2014.
5 /* ====================================================================
6 * Copyright (c) 2014 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
60 # error "CT is disabled"
66 #include <openssl/asn1.h>
67 #include <openssl/buffer.h>
68 #include <openssl/ct.h>
69 #include <openssl/err.h>
73 int o2i_SCT_signature(SCT *sct, const unsigned char **in, size_t len)
76 size_t len_remaining = len;
77 const unsigned char *p;
79 if (sct->version != SCT_VERSION_V1) {
80 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_UNSUPPORTED_VERSION);
84 * digitally-signed struct header: (1 byte) Hash algorithm (1 byte)
85 * Signature algorithm (2 bytes + ?) Signature
87 * This explicitly rejects empty signatures: they're invalid for
88 * all supported algorithms.
91 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
96 /* Get hash and signature algorithm */
99 if (SCT_get_signature_nid(sct) == NID_undef) {
100 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
103 /* Retrieve signature and check it is consistent with the buffer length */
105 len_remaining -= (p - *in);
106 if (siglen > len_remaining) {
107 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
111 if (SCT_set1_signature(sct, p, siglen) != 1)
113 len_remaining -= siglen;
116 return len - len_remaining;
119 SCT *o2i_SCT(SCT **psct, const unsigned char **in, size_t len)
122 const unsigned char *p;
124 if (len == 0 || len > MAX_SCT_SIZE) {
125 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
129 if ((sct = SCT_new()) == NULL)
135 if (sct->version == SCT_VERSION_V1) {
139 * Fixed-length header: struct { (1 byte) Version sct_version; (32
140 * bytes) log_id id; (8 bytes) uint64 timestamp; (2 bytes + ?)
141 * CtExtensions extensions;
144 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
149 sct->log_id = BUF_memdup(p, CT_V1_HASHLEN);
150 if (sct->log_id == NULL)
152 sct->log_id_len = CT_V1_HASHLEN;
155 n2l8(p, sct->timestamp);
159 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
163 sct->ext = BUF_memdup(p, len2);
164 if (sct->ext == NULL)
171 sig_len = o2i_SCT_signature(sct, &p, len);
173 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
179 /* If not V1 just cache encoding */
180 sct->sct = BUF_memdup(p, len);
181 if (sct->sct == NULL)
198 int i2o_SCT_signature(const SCT *sct, unsigned char **out)
201 unsigned char *p = NULL;
203 if (!SCT_signature_is_complete(sct)) {
204 CTerr(CT_F_I2O_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
208 if (sct->version != SCT_VERSION_V1) {
209 CTerr(CT_F_I2O_SCT_SIGNATURE, CT_R_UNSUPPORTED_VERSION);
214 * (1 byte) Hash algorithm
215 * (1 byte) Signature algorithm
216 * (2 bytes + ?) Signature
218 len = 4 + sct->sig_len;
225 p = OPENSSL_malloc(len);
227 CTerr(CT_F_I2O_SCT_SIGNATURE, ERR_R_MALLOC_FAILURE);
233 *p++ = sct->hash_alg;
235 s2n(sct->sig_len, p);
236 memcpy(p, sct->sig, sct->sig_len);
245 int i2o_SCT(const SCT *sct, unsigned char **out)
248 unsigned char *p = NULL;
250 if (!SCT_is_complete(sct)) {
251 CTerr(CT_F_I2O_SCT, CT_R_SCT_NOT_SET);
255 * Fixed-length header: struct { (1 byte) Version sct_version; (32 bytes)
256 * log_id id; (8 bytes) uint64 timestamp; (2 bytes + ?) CtExtensions
257 * extensions; (1 byte) Hash algorithm (1 byte) Signature algorithm (2
258 * bytes + ?) Signature
260 if (sct->version == SCT_VERSION_V1)
261 len = 43 + sct->ext_len + 4 + sct->sig_len;
272 p = OPENSSL_malloc(len);
274 CTerr(CT_F_I2O_SCT, ERR_R_MALLOC_FAILURE);
280 if (sct->version == SCT_VERSION_V1) {
282 memcpy(p, sct->log_id, CT_V1_HASHLEN);
284 l2n8(sct->timestamp, p);
285 s2n(sct->ext_len, p);
286 if (sct->ext_len > 0) {
287 memcpy(p, sct->ext, sct->ext_len);
290 if (i2o_SCT_signature(sct, &p) <= 0)
293 memcpy(p, sct->sct, len);
302 void SCT_LIST_free(STACK_OF(SCT) *a)
304 sk_SCT_pop_free(a, SCT_free);
307 STACK_OF(SCT) *o2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp,
310 STACK_OF(SCT) *sk = NULL;
311 size_t list_len, sct_len;
313 if (len < 2 || len > MAX_SCT_LIST_SIZE) {
314 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
319 if (list_len != len - 2) {
320 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
324 if (a == NULL || *a == NULL) {
325 sk = sk_SCT_new_null();
331 /* Use the given stack, but empty it first. */
333 while ((sct = sk_SCT_pop(sk)) != NULL)
337 while (list_len > 0) {
341 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
347 if (sct_len == 0 || sct_len > list_len) {
348 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
353 if ((sct = o2i_SCT(NULL, pp, sct_len)) == NULL)
355 if (!sk_SCT_push(sk, sct)) {
361 if (a != NULL && *a == NULL)
366 if (a == NULL || *a == NULL)
371 int i2o_SCT_LIST(const STACK_OF(SCT) *a, unsigned char **pp)
373 int len, sct_len, i, is_pp_new = 0;
375 unsigned char *p = NULL, *p2;
379 if ((len = i2o_SCT_LIST(a, NULL)) == -1) {
380 CTerr(CT_F_I2O_SCT_LIST, CT_R_SCT_LIST_INVALID);
383 if ((*pp = OPENSSL_malloc(len)) == NULL) {
384 CTerr(CT_F_I2O_SCT_LIST, ERR_R_MALLOC_FAILURE);
393 for (i = 0; i < sk_SCT_num(a); i++) {
397 if ((sct_len = i2o_SCT(sk_SCT_value(a, i), &p)) == -1)
401 if ((sct_len = i2o_SCT(sk_SCT_value(a, i), NULL)) == -1)
407 if (len2 > MAX_SCT_LIST_SIZE)
426 STACK_OF(SCT) *d2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp,
429 ASN1_OCTET_STRING *oct = NULL;
430 STACK_OF(SCT) *sk = NULL;
431 const unsigned char *p;
434 if (d2i_ASN1_OCTET_STRING(&oct, &p, len) == NULL)
438 if ((sk = o2i_SCT_LIST(a, &p, oct->length)) != NULL)
441 ASN1_OCTET_STRING_free(oct);
445 int i2d_SCT_LIST(STACK_OF(SCT) *a, unsigned char **out)
447 ASN1_OCTET_STRING oct;
451 if ((oct.length = i2o_SCT_LIST(a, &oct.data)) == -1)
454 len = i2d_ASN1_OCTET_STRING(&oct, out);
455 OPENSSL_free(oct.data);