1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/x509.h>
58
59 #include <openssl/asn1.h>
60 #include <openssl/digest.h>
61 #include <openssl/err.h>
62 #include <openssl/evp.h>
63 #include <openssl/obj.h>
64
65 #include "internal.h"
66
67
x509_digest_sign_algorithm(EVP_MD_CTX * ctx,X509_ALGOR * algor)68 int x509_digest_sign_algorithm(EVP_MD_CTX *ctx, X509_ALGOR *algor) {
69 const EVP_MD *digest = EVP_MD_CTX_md(ctx);
70 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx);
71 if (digest == NULL || pkey == NULL) {
72 OPENSSL_PUT_ERROR(ASN1, ASN1_R_CONTEXT_NOT_INITIALISED);
73 return 0;
74 }
75
76 if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
77 int pad_mode;
78 if (!EVP_PKEY_CTX_get_rsa_padding(ctx->pctx, &pad_mode)) {
79 return 0;
80 }
81 /* RSA-PSS has special signature algorithm logic. */
82 if (pad_mode == RSA_PKCS1_PSS_PADDING) {
83 return x509_rsa_ctx_to_pss(ctx, algor);
84 }
85 }
86
87 /* Default behavior: look up the OID for the algorithm/hash pair and encode
88 * that. */
89 int sign_nid;
90 if (!OBJ_find_sigid_by_algs(&sign_nid, EVP_MD_type(digest),
91 EVP_PKEY_id(pkey))) {
92 OPENSSL_PUT_ERROR(ASN1, ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
93 return 0;
94 }
95
96 /* RSA signature algorithms include an explicit NULL parameter. Others omit
97 * it. */
98 int paramtype =
99 (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) ? V_ASN1_NULL : V_ASN1_UNDEF;
100 X509_ALGOR_set0(algor, OBJ_nid2obj(sign_nid), paramtype, NULL);
101 return 1;
102 }
103
x509_digest_verify_init(EVP_MD_CTX * ctx,X509_ALGOR * sigalg,EVP_PKEY * pkey)104 int x509_digest_verify_init(EVP_MD_CTX *ctx, X509_ALGOR *sigalg,
105 EVP_PKEY *pkey) {
106 /* Convert the signature OID into digest and public key OIDs. */
107 int sigalg_nid = OBJ_obj2nid(sigalg->algorithm);
108 int digest_nid, pkey_nid;
109 if (!OBJ_find_sigid_algs(sigalg_nid, &digest_nid, &pkey_nid)) {
110 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
111 return 0;
112 }
113
114 /* Check the public key OID matches the public key type. */
115 if (pkey_nid != EVP_PKEY_id(pkey)) {
116 OPENSSL_PUT_ERROR(ASN1, ASN1_R_WRONG_PUBLIC_KEY_TYPE);
117 return 0;
118 }
119
120 /* NID_undef signals that there are custom parameters to set. */
121 if (digest_nid == NID_undef) {
122 if (sigalg_nid != NID_rsassaPss) {
123 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM);
124 return 0;
125 }
126 return x509_rsa_pss_to_ctx(ctx, sigalg, pkey);
127 }
128
129 /* Otherwise, initialize with the digest from the OID. */
130 const EVP_MD *digest = EVP_get_digestbynid(digest_nid);
131 if (digest == NULL) {
132 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
133 return 0;
134 }
135
136 return EVP_DigestVerifyInit(ctx, NULL, digest, NULL, pkey);
137 }
138