1 /* Written by Dr Stephen N Henson ([email protected]) 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 * [email protected].
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 * ([email protected]). This product includes software written by Tim
54 * Hudson ([email protected]). */
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
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 const RSA *rsa = key->pkey;
72 CBB spki, algorithm, oid, null, key_bitstring;
73 if (!CBB_add_asn1(out, &spki, CBS_ASN1_SEQUENCE) ||
74 !CBB_add_asn1(&spki, &algorithm, CBS_ASN1_SEQUENCE) ||
75 !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
76 !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) ||
77 !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
78 !CBB_add_asn1(&spki, &key_bitstring, CBS_ASN1_BITSTRING) ||
79 !CBB_add_u8(&key_bitstring, 0 /* padding */) ||
80 !RSA_marshal_public_key(&key_bitstring, rsa) ||
81 !CBB_flush(out)) {
82 OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
83 return 0;
84 }
85
86 return 1;
87 }
88
rsa_pub_decode(EVP_PKEY * out,CBS * params,CBS * key)89 static int rsa_pub_decode(EVP_PKEY *out, CBS *params, CBS *key) {
90 // See RFC 3279, section 2.3.1.
91
92 // The parameters must be NULL.
93 CBS null;
94 if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) ||
95 CBS_len(&null) != 0 ||
96 CBS_len(params) != 0) {
97 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
98 return 0;
99 }
100
101 RSA *rsa = RSA_parse_public_key(key);
102 if (rsa == NULL || CBS_len(key) != 0) {
103 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
104 RSA_free(rsa);
105 return 0;
106 }
107
108 EVP_PKEY_assign_RSA(out, rsa);
109 return 1;
110 }
111
rsa_pub_cmp(const EVP_PKEY * a,const EVP_PKEY * b)112 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b) {
113 const RSA *a_rsa = a->pkey;
114 const RSA *b_rsa = b->pkey;
115 return BN_cmp(RSA_get0_n(b_rsa), RSA_get0_n(a_rsa)) == 0 &&
116 BN_cmp(RSA_get0_e(b_rsa), RSA_get0_e(a_rsa)) == 0;
117 }
118
rsa_priv_encode(CBB * out,const EVP_PKEY * key)119 static int rsa_priv_encode(CBB *out, const EVP_PKEY *key) {
120 const RSA *rsa = key->pkey;
121 CBB pkcs8, algorithm, oid, null, private_key;
122 if (!CBB_add_asn1(out, &pkcs8, CBS_ASN1_SEQUENCE) ||
123 !CBB_add_asn1_uint64(&pkcs8, 0 /* version */) ||
124 !CBB_add_asn1(&pkcs8, &algorithm, CBS_ASN1_SEQUENCE) ||
125 !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT) ||
126 !CBB_add_bytes(&oid, rsa_asn1_meth.oid, rsa_asn1_meth.oid_len) ||
127 !CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
128 !CBB_add_asn1(&pkcs8, &private_key, CBS_ASN1_OCTETSTRING) ||
129 !RSA_marshal_private_key(&private_key, rsa) ||
130 !CBB_flush(out)) {
131 OPENSSL_PUT_ERROR(EVP, EVP_R_ENCODE_ERROR);
132 return 0;
133 }
134
135 return 1;
136 }
137
rsa_priv_decode(EVP_PKEY * out,CBS * params,CBS * key)138 static int rsa_priv_decode(EVP_PKEY *out, CBS *params, CBS *key) {
139 // Per RFC 3447, A.1, the parameters have type NULL.
140 CBS null;
141 if (!CBS_get_asn1(params, &null, CBS_ASN1_NULL) ||
142 CBS_len(&null) != 0 ||
143 CBS_len(params) != 0) {
144 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
145 return 0;
146 }
147
148 RSA *rsa = RSA_parse_private_key(key);
149 if (rsa == NULL || CBS_len(key) != 0) {
150 OPENSSL_PUT_ERROR(EVP, EVP_R_DECODE_ERROR);
151 RSA_free(rsa);
152 return 0;
153 }
154
155 EVP_PKEY_assign_RSA(out, rsa);
156 return 1;
157 }
158
rsa_opaque(const EVP_PKEY * pkey)159 static int rsa_opaque(const EVP_PKEY *pkey) {
160 const RSA *rsa = pkey->pkey;
161 return RSA_is_opaque(rsa);
162 }
163
int_rsa_size(const EVP_PKEY * pkey)164 static int int_rsa_size(const EVP_PKEY *pkey) {
165 const RSA *rsa = pkey->pkey;
166 return RSA_size(rsa);
167 }
168
rsa_bits(const EVP_PKEY * pkey)169 static int rsa_bits(const EVP_PKEY *pkey) {
170 const RSA *rsa = pkey->pkey;
171 return RSA_bits(rsa);
172 }
173
int_rsa_free(EVP_PKEY * pkey)174 static void int_rsa_free(EVP_PKEY *pkey) {
175 RSA_free(pkey->pkey);
176 pkey->pkey = NULL;
177 }
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},
183 9,
184
185 &rsa_pkey_meth,
186
187 rsa_pub_decode,
188 rsa_pub_encode,
189 rsa_pub_cmp,
190
191 rsa_priv_decode,
192 rsa_priv_encode,
193
194 /*set_priv_raw=*/NULL,
195 /*set_pub_raw=*/NULL,
196 /*get_priv_raw=*/NULL,
197 /*get_pub_raw=*/NULL,
198 /*set1_tls_encodedpoint=*/NULL,
199 /*get1_tls_encodedpoint=*/NULL,
200
201 rsa_opaque,
202
203 int_rsa_size,
204 rsa_bits,
205
206 0,
207 0,
208 0,
209
210 int_rsa_free,
211 };
212
EVP_PKEY_set1_RSA(EVP_PKEY * pkey,RSA * key)213 int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key) {
214 if (EVP_PKEY_assign_RSA(pkey, key)) {
215 RSA_up_ref(key);
216 return 1;
217 }
218 return 0;
219 }
220
EVP_PKEY_assign_RSA(EVP_PKEY * pkey,RSA * key)221 int EVP_PKEY_assign_RSA(EVP_PKEY *pkey, RSA *key) {
222 evp_pkey_set_method(pkey, &rsa_asn1_meth);
223 pkey->pkey = key;
224 return key != NULL;
225 }
226
EVP_PKEY_get0_RSA(const EVP_PKEY * pkey)227 RSA *EVP_PKEY_get0_RSA(const EVP_PKEY *pkey) {
228 if (pkey->type != EVP_PKEY_RSA) {
229 OPENSSL_PUT_ERROR(EVP, EVP_R_EXPECTING_AN_RSA_KEY);
230 return NULL;
231 }
232 return pkey->pkey;
233 }
234
EVP_PKEY_get1_RSA(const EVP_PKEY * pkey)235 RSA *EVP_PKEY_get1_RSA(const EVP_PKEY *pkey) {
236 RSA *rsa = EVP_PKEY_get0_RSA(pkey);
237 if (rsa != NULL) {
238 RSA_up_ref(rsa);
239 }
240 return rsa;
241 }
242