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).
62 # include "internal/cryptlib.h"
63 # include <openssl/asn1.h>
64 # include <openssl/evp.h>
65 # include <openssl/x509.h>
66 # include <openssl/x509v3.h>
67 # include "crypto/include/internal/ct_int.h"
69 # define n2s(c,s) ((s=(((unsigned int)((c)[0]))<< 8)| \
70 (((unsigned int)((c)[1])) )),c+=2)
72 # define s2n(s,c) ((c[0]=(unsigned char)(((s)>> 8)&0xff), \
73 c[1]=(unsigned char)(((s) )&0xff)),c+=2)
75 # define n2l8(c,l) (l =((uint64_t)(*((c)++)))<<56, \
76 l|=((uint64_t)(*((c)++)))<<48, \
77 l|=((uint64_t)(*((c)++)))<<40, \
78 l|=((uint64_t)(*((c)++)))<<32, \
79 l|=((uint64_t)(*((c)++)))<<24, \
80 l|=((uint64_t)(*((c)++)))<<16, \
81 l|=((uint64_t)(*((c)++)))<< 8, \
82 l|=((uint64_t)(*((c)++))))
84 # define l2n8(l,c) (*((c)++)=(unsigned char)(((l)>>56)&0xff), \
85 *((c)++)=(unsigned char)(((l)>>48)&0xff), \
86 *((c)++)=(unsigned char)(((l)>>40)&0xff), \
87 *((c)++)=(unsigned char)(((l)>>32)&0xff), \
88 *((c)++)=(unsigned char)(((l)>>24)&0xff), \
89 *((c)++)=(unsigned char)(((l)>>16)&0xff), \
90 *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
91 *((c)++)=(unsigned char)(((l) )&0xff))
93 static STACK_OF(SCT) *d2i_SCT_LIST(STACK_OF(SCT) **a,
94 const unsigned char **pp, int len);
95 static int i2d_SCT_LIST(STACK_OF(SCT) *a, unsigned char **pp);
96 static int i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list,
97 BIO *out, int indent);
99 static char *i2s_poison(const X509V3_EXT_METHOD *method, void *val)
101 return OPENSSL_strdup("NULL");
104 const X509V3_EXT_METHOD v3_ct_scts[] = {
105 { NID_ct_precert_scts, 0, NULL,
106 0, (X509V3_EXT_FREE)SCT_LIST_free,
107 (X509V3_EXT_D2I)d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
109 (X509V3_EXT_I2R)i2r_SCT_LIST, 0,
112 { NID_ct_precert_poison, 0, ASN1_ITEM_ref(ASN1_NULL),
113 0, 0, 0, 0, i2s_poison, 0,
116 { NID_ct_cert_scts, 0, NULL,
117 0, (X509V3_EXT_FREE)SCT_LIST_free,
118 (X509V3_EXT_D2I)d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
120 (X509V3_EXT_I2R)i2r_SCT_LIST, 0,
124 int SCT_signature_is_valid(const SCT *sct)
126 if (SCT_get_signature_nid(sct) == NID_undef ||
127 sct->sig_len == 0 || sct->sig == NULL) {
135 int o2i_SCT_signature(SCT *sct, const unsigned char **in, size_t len)
138 size_t len_remaining = len;
139 const unsigned char *p = *in;
141 if (sct->version != SCT_V1) {
142 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_UNSUPPORTED_VERSION);
146 * digitally-signed struct header: (1 byte) Hash algorithm (1 byte)
147 * Signature algorithm (2 bytes + ?) Signature
149 * This explicitly rejects empty signatures: they're invalid for
150 * all supported algorithms.
153 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
157 /* Get hash and signature algorithm */
158 sct->hash_alg = *p++;
160 if (SCT_get_signature_nid(sct) == NID_undef) {
161 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
164 /* Retrieve signature and check it is consistent with the buffer length */
166 len_remaining -= (p - *in);
167 if (siglen > len_remaining) {
168 CTerr(CT_F_O2I_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
172 if (SCT_set1_signature(sct, p, siglen) != 1)
174 len_remaining -= siglen;
177 return len - len_remaining;
180 SCT *o2i_SCT(SCT **psct, const unsigned char **in, size_t len)
183 const unsigned char *p;
185 if (len == 0 || len > MAX_SCT_SIZE) {
186 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
190 if ((sct = SCT_new()) == NULL)
196 if (sct->version == SCT_V1) {
200 * Fixed-length header: struct { (1 byte) Version sct_version; (32
201 * bytes) log_id id; (8 bytes) uint64 timestamp; (2 bytes + ?)
202 * CtExtensions extensions;
205 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
210 sct->log_id = BUF_memdup(p, SCT_V1_HASHLEN);
211 if (sct->log_id == NULL)
213 sct->log_id_len = SCT_V1_HASHLEN;
216 n2l8(p, sct->timestamp);
220 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
224 sct->ext = BUF_memdup(p, len2);
225 if (sct->ext == NULL)
232 sig_len = o2i_SCT_signature(sct, &p, len);
234 CTerr(CT_F_O2I_SCT, CT_R_SCT_INVALID);
240 /* If not V1 just cache encoding */
241 sct->sct = BUF_memdup(p, len);
242 if (sct->sct == NULL)
259 int i2o_SCT_signature(const SCT *sct, unsigned char **out)
262 unsigned char *p = NULL;
264 if (!SCT_signature_is_valid(sct)) {
265 CTerr(CT_F_I2O_SCT_SIGNATURE, CT_R_SCT_INVALID_SIGNATURE);
269 if (sct->version != SCT_V1) {
270 CTerr(CT_F_I2O_SCT_SIGNATURE, CT_R_UNSUPPORTED_VERSION);
275 * (1 byte) Hash algorithm
276 * (1 byte) Signature algorithm
277 * (2 bytes + ?) Signature
279 len = 4 + sct->sig_len;
286 p = OPENSSL_malloc(len);
288 CTerr(CT_F_I2O_SCT_SIGNATURE, ERR_R_MALLOC_FAILURE);
294 *p++ = sct->hash_alg;
296 s2n(sct->sig_len, p);
297 memcpy(p, sct->sig, sct->sig_len);
306 int i2o_SCT(const SCT *sct, unsigned char **out)
309 unsigned char *p = NULL;
311 if (!SCT_is_valid(sct)) {
312 CTerr(CT_F_I2O_SCT, CT_R_SCT_NOT_SET);
316 * Fixed-length header: struct { (1 byte) Version sct_version; (32 bytes)
317 * log_id id; (8 bytes) uint64 timestamp; (2 bytes + ?) CtExtensions
318 * extensions; (1 byte) Hash algorithm (1 byte) Signature algorithm (2
319 * bytes + ?) Signature
321 if (sct->version == SCT_V1)
322 len = 43 + sct->ext_len + 4 + sct->sig_len;
333 p = OPENSSL_malloc(len);
335 CTerr(CT_F_I2O_SCT, ERR_R_MALLOC_FAILURE);
341 if (sct->version == SCT_V1) {
343 memcpy(p, sct->log_id, SCT_V1_HASHLEN);
345 l2n8(sct->timestamp, p);
346 s2n(sct->ext_len, p);
347 if (sct->ext_len > 0) {
348 memcpy(p, sct->ext, sct->ext_len);
351 if (i2o_SCT_signature(sct, &p) <= 0)
354 memcpy(p, sct->sct, len);
363 void SCT_LIST_free(STACK_OF(SCT) *a)
365 sk_SCT_pop_free(a, SCT_free);
368 STACK_OF(SCT) *o2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp,
371 STACK_OF(SCT) *sk = NULL;
372 size_t list_len, sct_len;
374 if (len < 2 || len > MAX_SCT_LIST_SIZE) {
375 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
380 if (list_len != len - 2) {
381 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
385 if (a == NULL || *a == NULL) {
386 sk = sk_SCT_new_null();
392 /* Use the given stack, but empty it first. */
394 while ((sct = sk_SCT_pop(sk)) != NULL)
398 while (list_len > 0) {
402 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
408 if (sct_len == 0 || sct_len > list_len) {
409 CTerr(CT_F_O2I_SCT_LIST, CT_R_SCT_LIST_INVALID);
414 if ((sct = o2i_SCT(NULL, pp, sct_len)) == NULL)
416 if (!sk_SCT_push(sk, sct)) {
422 if (a != NULL && *a == NULL)
427 if (a == NULL || *a == NULL)
432 int i2o_SCT_LIST(STACK_OF(SCT) *a, unsigned char **pp)
434 int len, sct_len, i, is_pp_new = 0;
436 unsigned char *p = NULL, *p2;
440 if ((len = i2o_SCT_LIST(a, NULL)) == -1) {
441 CTerr(CT_F_I2O_SCT_LIST, CT_R_SCT_LIST_INVALID);
444 if ((*pp = OPENSSL_malloc(len)) == NULL) {
445 CTerr(CT_F_I2O_SCT_LIST, ERR_R_MALLOC_FAILURE);
454 for (i = 0; i < sk_SCT_num(a); i++) {
458 if ((sct_len = i2o_SCT(sk_SCT_value(a, i), &p)) == -1)
462 if ((sct_len = i2o_SCT(sk_SCT_value(a, i), NULL)) == -1)
468 if (len2 > MAX_SCT_LIST_SIZE)
487 static STACK_OF(SCT) *d2i_SCT_LIST(STACK_OF(SCT) **a,
488 const unsigned char **pp, int len)
490 ASN1_OCTET_STRING *oct = NULL;
491 STACK_OF(SCT) *sk = NULL;
492 const unsigned char *p;
495 if (d2i_ASN1_OCTET_STRING(&oct, &p, len) == NULL)
499 if ((sk = o2i_SCT_LIST(a, &p, oct->length)) != NULL)
502 ASN1_OCTET_STRING_free(oct);
506 static int i2d_SCT_LIST(STACK_OF(SCT) *a, unsigned char **out)
508 ASN1_OCTET_STRING oct;
512 if ((oct.length = i2o_SCT_LIST(a, &oct.data)) == -1)
515 len = i2d_ASN1_OCTET_STRING(&oct, out);
516 OPENSSL_free(oct.data);
520 static int i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list,
521 BIO *out, int indent)
525 for (i = 0; i < sk_SCT_num(sct_list); ++i) {
526 SCT *sct = sk_SCT_value(sct_list, i);
527 SCT_print(sct, out, indent);
528 if (i < sk_SCT_num(sct_list) - 1)
529 BIO_printf(out, "\n");