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 "../rsa/internal.h"
66 #include "internal.h"
67
68
rsa_pub_encode(CBB * out,const EVP_PKEY * key)69 static int rsa_pub_encode(CBB *out, const EVP_PKEY *key) {
70 /* See RFC 3279, section 2.3.1. */
71 CBB spki, algorithm, oid, null, key_bitstring;
72 if (!CBB_add_asn1(out, &spki, CBS_ASN1_SEQUENCE) ||
73 !CBB_add_asn1(&spki, &algorithm, CBS_ASN1_SEQUENCE) ||
74 !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
75 !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) ||
76 !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
77 !CBB_add_asn1(&spki, &key_bitstring, CBS_ASN1_BITSTRING) ||
78 !CBB_add_u8(&key_bitstring, 0 /* padding */) ||
79 !RSA_marshal_public_key(&key_bitstring, key->pkey.rsa) ||
80 !CBB_flush(out)) {
81 OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
82 return 0;
83 }
84
85 return 1;
86 }
87
rsa_pub_decode(EVP_PKEY * out,CBS * params,CBS * key)88 static int rsa_pub_decode(EVP_PKEY *out, CBS *params, CBS *key) {
89 /* See RFC 3279, section 2.3.1. */
90
91 /* The parameters must be NULL. */
92 CBS null;
93 if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) ||
94 CBS_len(&null) != 0 ||
95 CBS_len(params) != 0) {
96 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
97 return 0;
98 }
99
100 /* Estonian IDs issued between September 2014 to September 2015 are
101 * broken. See https://crbug.com/532048 and https://crbug.com/534766.
102 *
103 * TODO(davidben): Switch this to the strict version in March 2016 or when
104 * Chromium can force client certificates down a different codepath, whichever
105 * comes first. */
106 RSA *rsa = RSA_parse_public_key_buggy(key);
107 if (rsa == NULL || CBS_len(key) != 0) {
108 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
109 RSA_free(rsa);
110 return 0;
111 }
112
113 EVP_PKEY_assign_RSA(out, rsa);
114 return 1;
115 }
116
rsa_pub_cmp(const EVP_PKEY * a,const EVP_PKEY * b)117 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) {
118 return BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) == 0 &&
119 BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) == 0;
120 }
121
rsa_priv_encode(CBB * out,const EVP_PKEY * key)122 static int rsa_priv_encode(CBB *out, const EVP_PKEY *key) {
123 CBB pkcs8, algorithm, oid, null, private_key;
124 if (!CBB_add_asn1(out, &pkcs8, CBS_ASN1_SEQUENCE) ||
125 !CBB_add_asn1_uint64(&pkcs8, 0 /* version */) ||
126 !CBB_add_asn1(&pkcs8, &algorithm, CBS_ASN1_SEQUENCE) ||
127 !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
128 !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) ||
129 !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
130 !CBB_add_asn1(&pkcs8, &private_key, CBS_ASN1_OCTETSTRING) ||
131 !RSA_marshal_private_key(&private_key, key->pkey.rsa) ||
132 !CBB_flush(out)) {
133 OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
134 return 0;
135 }
136
137 return 1;
138 }
139
rsa_priv_decode(EVP_PKEY * out,CBS * params,CBS * key)140 static int rsa_priv_decode(EVP_PKEY *out, CBS *params, CBS *key) {
141 /* Per RFC 3447, A.1, the parameters have type NULL. */
142 CBS null;
143 if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) ||
144 CBS_len(&null) != 0 ||
145 CBS_len(params) != 0) {
146 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
147 return 0;
148 }
149
150 RSA *rsa = RSA_parse_private_key(key);
151 if (rsa == NULL || CBS_len(key) != 0) {
152 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
153 RSA_free(rsa);
154 return 0;
155 }
156
157 EVP_PKEY_assign_RSA(out, rsa);
158 return 1;
159 }
160
rsa_opaque(const EVP_PKEY * pkey)161 static int rsa_opaque(const EVP_PKEY *pkey) {
162 return RSA_is_opaque(pkey->pkey.rsa);
163 }
164
rsa_supports_digest(const EVP_PKEY * pkey,const EVP_MD * md)165 static int rsa_supports_digest(const EVP_PKEY *pkey, const EVP_MD *md) {
166 return RSA_supports_digest(pkey->pkey.rsa, md);
167 }
168
int_rsa_size(const EVP_PKEY * pkey)169 static int int_rsa_size(const EVP_PKEY *pkey) {
170 return RSA_size(pkey->pkey.rsa);
171 }
172
rsa_bits(const EVP_PKEY * pkey)173 static int rsa_bits(const EVP_PKEY *pkey) {
174 return BN_num_bits(pkey->pkey.rsa->n);
175 }
176
int_rsa_free(EVP_PKEY * pkey)177 static void int_rsa_free(EVP_PKEY *pkey) { RSA_free(pkey->pkey.rsa); }
178
179 const EVP_PKEY_ASN1_METHOD rsa_asn1_meth = {
180 EVP_PKEY_RSA,
181 /* 1.2.840.113549.1.1.1 */
182 {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01}, 9,
183
184 rsa_pub_decode,
185 rsa_pub_encode,
186 rsa_pub_cmp,
187
188 rsa_priv_decode,
189 rsa_priv_encode,
190
191 rsa_opaque,
192 rsa_supports_digest,
193
194 int_rsa_size,
195 rsa_bits,
196
197 0,0,0,
198
199 int_rsa_free,
200 };
201