1 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
2 * project 2006.
3 */
4 /* ====================================================================
5 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
23 *
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
28 *
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
32 *
33 * 6. Redistributions of any form whatsoever must retain the following
34 * acknowledgment:
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
37 *
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
51 *
52 * This product includes cryptographic software written by Eric Young
53 * (eay@cryptsoft.com). This product includes software written by Tim
54 * Hudson (tjh@cryptsoft.com). */
55
56 #include <openssl/evp.h>
57
58 #include <openssl/bn.h>
59 #include <openssl/bytestring.h>
60 #include <openssl/digest.h>
61 #include <openssl/err.h>
62 #include <openssl/mem.h>
63 #include <openssl/rsa.h>
64
65 #include "../fipsmodule/rsa/internal.h"
66 #include "../internal.h"
67 #include "internal.h"
68
69
70 static struct CRYPTO_STATIC_MUTEX g_buggy_lock = CRYPTO_STATIC_MUTEX_INIT;
71 static int g_buggy = 1;
72
EVP_set_buggy_rsa_parser(int buggy)73 void EVP_set_buggy_rsa_parser(int buggy) {
74 CRYPTO_STATIC_MUTEX_lock_write(&g_buggy_lock);
75 g_buggy = buggy;
76 CRYPTO_STATIC_MUTEX_unlock_write(&g_buggy_lock);
77 }
78
rsa_pub_encode(CBB * out,const EVP_PKEY * key)79 static int rsa_pub_encode(CBB *out, const EVP_PKEY *key) {
80 /* See RFC 3279, section 2.3.1. */
81 CBB spki, algorithm, oid, null, key_bitstring;
82 if (!CBB_add_asn1(out, &spki, CBS_ASN1_SEQUENCE) ||
83 !CBB_add_asn1(&spki, &algorithm, CBS_ASN1_SEQUENCE) ||
84 !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
85 !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) ||
86 !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
87 !CBB_add_asn1(&spki, &key_bitstring, CBS_ASN1_BITSTRING) ||
88 !CBB_add_u8(&key_bitstring, 0 /* padding */) ||
89 !RSA_marshal_public_key(&key_bitstring, key->pkey.rsa) ||
90 !CBB_flush(out)) {
91 OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
92 return 0;
93 }
94
95 return 1;
96 }
97
rsa_pub_decode(EVP_PKEY * out,CBS * params,CBS * key)98 static int rsa_pub_decode(EVP_PKEY *out, CBS *params, CBS *key) {
99 int buggy;
100 CRYPTO_STATIC_MUTEX_lock_read(&g_buggy_lock);
101 buggy = g_buggy;
102 CRYPTO_STATIC_MUTEX_unlock_read(&g_buggy_lock);
103
104 /* See RFC 3279, section 2.3.1. */
105
106 /* The parameters must be NULL. */
107 CBS null;
108 if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) ||
109 CBS_len(&null) != 0 ||
110 CBS_len(params) != 0) {
111 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
112 return 0;
113 }
114
115 /* Estonian IDs issued between September 2014 to September 2015 are
116 * broken. See https://crbug.com/532048 and https://crbug.com/534766.
117 *
118 * TODO(davidben): Switch this to the strict version in March 2016 or when
119 * Chromium can force client certificates down a different codepath, whichever
120 * comes first. */
121 RSA *rsa = buggy ? RSA_parse_public_key_buggy(key) : RSA_parse_public_key(key);
122 if (rsa == NULL || CBS_len(key) != 0) {
123 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
124 RSA_free(rsa);
125 return 0;
126 }
127
128 EVP_PKEY_assign_RSA(out, rsa);
129 return 1;
130 }
131
rsa_pub_cmp(const EVP_PKEY * a,const EVP_PKEY * b)132 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) {
133 return BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) == 0 &&
134 BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) == 0;
135 }
136
rsa_priv_encode(CBB * out,const EVP_PKEY * key)137 static int rsa_priv_encode(CBB *out, const EVP_PKEY *key) {
138 CBB pkcs8, algorithm, oid, null, private_key;
139 if (!CBB_add_asn1(out, &pkcs8, CBS_ASN1_SEQUENCE) ||
140 !CBB_add_asn1_uint64(&pkcs8, 0 /* version */) ||
141 !CBB_add_asn1(&pkcs8, &algorithm, CBS_ASN1_SEQUENCE) ||
142 !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
143 !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) ||
144 !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
145 !CBB_add_asn1(&pkcs8, &private_key, CBS_ASN1_OCTETSTRING) ||
146 !RSA_marshal_private_key(&private_key, key->pkey.rsa) ||
147 !CBB_flush(out)) {
148 OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
149 return 0;
150 }
151
152 return 1;
153 }
154
rsa_priv_decode(EVP_PKEY * out,CBS * params,CBS * key)155 static int rsa_priv_decode(EVP_PKEY *out, CBS *params, CBS *key) {
156 /* Per RFC 3447, A.1, the parameters have type NULL. */
157 CBS null;
158 if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) ||
159 CBS_len(&null) != 0 ||
160 CBS_len(params) != 0) {
161 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
162 return 0;
163 }
164
165 RSA *rsa = RSA_parse_private_key(key);
166 if (rsa == NULL || CBS_len(key) != 0) {
167 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
168 RSA_free(rsa);
169 return 0;
170 }
171
172 EVP_PKEY_assign_RSA(out, rsa);
173 return 1;
174 }
175
rsa_opaque(const EVP_PKEY * pkey)176 static int rsa_opaque(const EVP_PKEY *pkey) {
177 return RSA_is_opaque(pkey->pkey.rsa);
178 }
179
int_rsa_size(const EVP_PKEY * pkey)180 static int int_rsa_size(const EVP_PKEY *pkey) {
181 return RSA_size(pkey->pkey.rsa);
182 }
183
rsa_bits(const EVP_PKEY * pkey)184 static int rsa_bits(const EVP_PKEY *pkey) {
185 return BN_num_bits(pkey->pkey.rsa->n);
186 }
187
int_rsa_free(EVP_PKEY * pkey)188 static void int_rsa_free(EVP_PKEY *pkey) { RSA_free(pkey->pkey.rsa); }
189
190 const EVP_PKEY_ASN1_METHOD rsa_asn1_meth = {
191 EVP_PKEY_RSA,
192 /* 1.2.840.113549.1.1.1 */
193 {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01}, 9,
194
195 rsa_pub_decode,
196 rsa_pub_encode,
197 rsa_pub_cmp,
198
199 rsa_priv_decode,
200 rsa_priv_encode,
201
202 rsa_opaque,
203
204 int_rsa_size,
205 rsa_bits,
206
207 0,0,0,
208
209 int_rsa_free,
210 };
211