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 #define n2s(c,s) ((s=(((unsigned int)((c)[0]))<< 8)| \
74 (((unsigned int)((c)[1])) )),c+=2)
76 #define s2n(s,c) ((c[0]=(unsigned char)(((s)>> 8)&0xff), \
77 c[1]=(unsigned char)(((s) )&0xff)),c+=2)
79 #define n2l8(c,l) (l =((uint64_t)(*((c)++)))<<56, \
80 l|=((uint64_t)(*((c)++)))<<48, \
81 l|=((uint64_t)(*((c)++)))<<40, \
82 l|=((uint64_t)(*((c)++)))<<32, \
83 l|=((uint64_t)(*((c)++)))<<24, \
84 l|=((uint64_t)(*((c)++)))<<16, \
85 l|=((uint64_t)(*((c)++)))<< 8, \
86 l|=((uint64_t)(*((c)++))))
88 #define l2n8(l,c) (*((c)++)=(unsigned char)(((l)>>56)&0xff), \
89 *((c)++)=(unsigned char)(((l)>>48)&0xff), \
90 *((c)++)=(unsigned char)(((l)>>40)&0xff), \
91 *((c)++)=(unsigned char)(((l)>>32)&0xff), \
92 *((c)++)=(unsigned char)(((l)>>24)&0xff), \
93 *((c)++)=(unsigned char)(((l)>>16)&0xff), \
94 *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
95 *((c)++)=(unsigned char)(((l) )&0xff))
97 int o2i_SCT_signature(SCT *sct, const unsigned char **in, size_t len)
100 size_t len_remaining = len;
101 const unsigned char *p = *in;
103 if (sct->version != SCT_VERSION_V1) {
104 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_UNSUPPORTED_VERSION);
108 * digitally-signed struct header: (1 byte) Hash algorithm (1 byte)
109 * Signature algorithm (2 bytes + ?) Signature
111 * This explicitly rejects empty signatures: they're invalid for
112 * all supported algorithms.
115 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
119 /* Get hash and signature algorithm */
120 sct->hash_alg = *p++;
122 if (SCT_get_signature_nid(sct) == NID_undef) {
123 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
126 /* Retrieve signature and check it is consistent with the buffer length */
128 len_remaining -= (p - *in);
129 if (siglen > len_remaining) {
130 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
134 if (SCT_set1_signature(sct, p, siglen) != 1)
136 len_remaining -= siglen;
139 return len - len_remaining;
142 SCT *o2i_SCT(SCT **psct, const unsigned char **in, size_t len)
145 const unsigned char *p;
147 if (len == 0 || len > MAX_SCT_SIZE) {
148 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
152 if ((sct = SCT_new()) == NULL)
158 if (sct->version == SCT_VERSION_V1) {
162 * Fixed-length header: struct { (1 byte) Version sct_version; (32
163 * bytes) log_id id; (8 bytes) uint64 timestamp; (2 bytes + ?)
164 * CtExtensions extensions;
167 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
172 sct->log_id = BUF_memdup(p, CT_V1_HASHLEN);
173 if (sct->log_id == NULL)
175 sct->log_id_len = CT_V1_HASHLEN;
178 n2l8(p, sct->timestamp);
182 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
186 sct->ext = BUF_memdup(p, len2);
187 if (sct->ext == NULL)
194 sig_len = o2i_SCT_signature(sct, &p, len);
196 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
202 /* If not V1 just cache encoding */
203 sct->sct = BUF_memdup(p, len);
204 if (sct->sct == NULL)
221 int i2o_SCT_signature(const SCT *sct, unsigned char **out)
224 unsigned char *p = NULL;
226 if (!SCT_signature_is_complete(sct)) {
227 CTerr(CT_F_I2O_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
231 if (sct->version != SCT_VERSION_V1) {
232 CTerr(CT_F_I2O_SCT_SIGNATURE, CT_R_UNSUPPORTED_VERSION);
237 * (1 byte) Hash algorithm
238 * (1 byte) Signature algorithm
239 * (2 bytes + ?) Signature
241 len = 4 + sct->sig_len;
248 p = OPENSSL_malloc(len);
250 CTerr(CT_F_I2O_SCT_SIGNATURE, ERR_R_MALLOC_FAILURE);
256 *p++ = sct->hash_alg;
258 s2n(sct->sig_len, p);
259 memcpy(p, sct->sig, sct->sig_len);
268 int i2o_SCT(const SCT *sct, unsigned char **out)
271 unsigned char *p = NULL;
273 if (!SCT_is_complete(sct)) {
274 CTerr(CT_F_I2O_SCT, CT_R_SCT_NOT_SET);
278 * Fixed-length header: struct { (1 byte) Version sct_version; (32 bytes)
279 * log_id id; (8 bytes) uint64 timestamp; (2 bytes + ?) CtExtensions
280 * extensions; (1 byte) Hash algorithm (1 byte) Signature algorithm (2
281 * bytes + ?) Signature
283 if (sct->version == SCT_VERSION_V1)
284 len = 43 + sct->ext_len + 4 + sct->sig_len;
295 p = OPENSSL_malloc(len);
297 CTerr(CT_F_I2O_SCT, ERR_R_MALLOC_FAILURE);
303 if (sct->version == SCT_VERSION_V1) {
305 memcpy(p, sct->log_id, CT_V1_HASHLEN);
307 l2n8(sct->timestamp, p);
308 s2n(sct->ext_len, p);
309 if (sct->ext_len > 0) {
310 memcpy(p, sct->ext, sct->ext_len);
313 if (i2o_SCT_signature(sct, &p) <= 0)
316 memcpy(p, sct->sct, len);
325 void SCT_LIST_free(STACK_OF(SCT) *a)
327 sk_SCT_pop_free(a, SCT_free);
330 STACK_OF(SCT) *o2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp,
333 STACK_OF(SCT) *sk = NULL;
334 size_t list_len, sct_len;
336 if (len < 2 || len > MAX_SCT_LIST_SIZE) {
337 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
342 if (list_len != len - 2) {
343 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
347 if (a == NULL || *a == NULL) {
348 sk = sk_SCT_new_null();
354 /* Use the given stack, but empty it first. */
356 while ((sct = sk_SCT_pop(sk)) != NULL)
360 while (list_len > 0) {
364 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
370 if (sct_len == 0 || sct_len > list_len) {
371 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
376 if ((sct = o2i_SCT(NULL, pp, sct_len)) == NULL)
378 if (!sk_SCT_push(sk, sct)) {
384 if (a != NULL && *a == NULL)
389 if (a == NULL || *a == NULL)
394 int i2o_SCT_LIST(const STACK_OF(SCT) *a, unsigned char **pp)
396 int len, sct_len, i, is_pp_new = 0;
398 unsigned char *p = NULL, *p2;
402 if ((len = i2o_SCT_LIST(a, NULL)) == -1) {
403 CTerr(CT_F_I2O_SCT_LIST, CT_R_SCT_LIST_INVALID);
406 if ((*pp = OPENSSL_malloc(len)) == NULL) {
407 CTerr(CT_F_I2O_SCT_LIST, ERR_R_MALLOC_FAILURE);
416 for (i = 0; i < sk_SCT_num(a); i++) {
420 if ((sct_len = i2o_SCT(sk_SCT_value(a, i), &p)) == -1)
424 if ((sct_len = i2o_SCT(sk_SCT_value(a, i), NULL)) == -1)
430 if (len2 > MAX_SCT_LIST_SIZE)
449 STACK_OF(SCT) *d2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp,
452 ASN1_OCTET_STRING *oct = NULL;
453 STACK_OF(SCT) *sk = NULL;
454 const unsigned char *p;
457 if (d2i_ASN1_OCTET_STRING(&oct, &p, len) == NULL)
461 if ((sk = o2i_SCT_LIST(a, &p, oct->length)) != NULL)
464 ASN1_OCTET_STRING_free(oct);
468 int i2d_SCT_LIST(STACK_OF(SCT) *a, unsigned char **out)
470 ASN1_OCTET_STRING oct;
474 if ((oct.length = i2o_SCT_LIST(a, &oct.data)) == -1)
477 len = i2d_ASN1_OCTET_STRING(&oct, out);
478 OPENSSL_free(oct.data);