1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 68 int x509_digest_sign_algorithm(EVP_MD_CTX *ctx, X509_ALGOR *algor) { 69 EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx); 70 if (pkey == NULL) { 71 OPENSSL_PUT_ERROR(ASN1, ASN1_R_CONTEXT_NOT_INITIALISED); 72 return 0; 73 } 74 75 if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) { 76 int pad_mode; 77 if (!EVP_PKEY_CTX_get_rsa_padding(ctx->pctx, &pad_mode)) { 78 return 0; 79 } 80 /* RSA-PSS has special signature algorithm logic. */ 81 if (pad_mode == RSA_PKCS1_PSS_PADDING) { 82 return x509_rsa_ctx_to_pss(ctx, algor); 83 } 84 } 85 86 if (EVP_PKEY_id(pkey) == EVP_PKEY_ED25519) { 87 return X509_ALGOR_set0(algor, OBJ_nid2obj(NID_ED25519), V_ASN1_UNDEF, NULL); 88 } 89 90 /* Default behavior: look up the OID for the algorithm/hash pair and encode 91 * that. */ 92 const EVP_MD *digest = EVP_MD_CTX_md(ctx); 93 if (digest == NULL) { 94 OPENSSL_PUT_ERROR(ASN1, ASN1_R_CONTEXT_NOT_INITIALISED); 95 return 0; 96 } 97 98 int sign_nid; 99 if (!OBJ_find_sigid_by_algs(&sign_nid, EVP_MD_type(digest), 100 EVP_PKEY_id(pkey))) { 101 OPENSSL_PUT_ERROR(ASN1, ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); 102 return 0; 103 } 104 105 /* RSA signature algorithms include an explicit NULL parameter. Others omit 106 * it. */ 107 int paramtype = 108 (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) ? V_ASN1_NULL : V_ASN1_UNDEF; 109 X509_ALGOR_set0(algor, OBJ_nid2obj(sign_nid), paramtype, NULL); 110 return 1; 111 } 112 113 int x509_digest_verify_init(EVP_MD_CTX *ctx, X509_ALGOR *sigalg, 114 EVP_PKEY *pkey) { 115 /* Convert the signature OID into digest and public key OIDs. */ 116 int sigalg_nid = OBJ_obj2nid(sigalg->algorithm); 117 int digest_nid, pkey_nid; 118 if (!OBJ_find_sigid_algs(sigalg_nid, &digest_nid, &pkey_nid)) { 119 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM); 120 return 0; 121 } 122 123 /* Check the public key OID matches the public key type. */ 124 if (pkey_nid != EVP_PKEY_id(pkey)) { 125 OPENSSL_PUT_ERROR(ASN1, ASN1_R_WRONG_PUBLIC_KEY_TYPE); 126 return 0; 127 } 128 129 /* NID_undef signals that there are custom parameters to set. */ 130 if (digest_nid == NID_undef) { 131 if (sigalg_nid == NID_rsassaPss) { 132 return x509_rsa_pss_to_ctx(ctx, sigalg, pkey); 133 } 134 if (sigalg_nid == NID_ED25519) { 135 if (sigalg->parameter != NULL) { 136 OPENSSL_PUT_ERROR(X509, X509_R_INVALID_PARAMETER); 137 return 0; 138 } 139 return EVP_DigestVerifyInit(ctx, NULL, NULL, NULL, pkey); 140 } 141 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM); 142 return 0; 143 } 144 145 /* Otherwise, initialize with the digest from the OID. */ 146 const EVP_MD *digest = EVP_get_digestbynid(digest_nid); 147 if (digest == NULL) { 148 OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); 149 return 0; 150 } 151 152 return EVP_DigestVerifyInit(ctx, NULL, digest, NULL, pkey); 153 } 154
