Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/asn1/a_verify.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This package is an SSL implementation written |
| 6 | * by Eric Young (eay@cryptsoft.com). |
| 7 | * The implementation was written so as to conform with Netscapes SSL. |
| 8 | * |
| 9 | * This library is free for commercial and non-commercial use as long as |
| 10 | * the following conditions are aheared to. The following conditions |
| 11 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 13 | * included with this distribution is covered by the same copyright terms |
| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 15 | * |
| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 17 | * the code are not to be removed. |
| 18 | * If this package is used in a product, Eric Young should be given attribution |
| 19 | * as the author of the parts of the library used. |
| 20 | * This can be in the form of a textual message at program startup or |
| 21 | * in documentation (online or textual) provided with the package. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 26 | * 1. Redistributions of source code must retain the copyright |
| 27 | * notice, this list of conditions and the following disclaimer. |
| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer in the |
| 30 | * documentation and/or other materials provided with the distribution. |
| 31 | * 3. All advertising materials mentioning features or use of this software |
| 32 | * must display the following acknowledgement: |
| 33 | * "This product includes cryptographic software written by |
| 34 | * Eric Young (eay@cryptsoft.com)" |
| 35 | * The word 'cryptographic' can be left out if the rouines from the library |
| 36 | * being used are not cryptographic related :-). |
| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 38 | * the apps directory (application code) you must include an acknowledgement: |
| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 40 | * |
| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 51 | * SUCH DAMAGE. |
| 52 | * |
| 53 | * The licence and distribution terms for any publically available version or |
| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 55 | * copied and put under another distribution licence |
| 56 | * [including the GNU Public Licence.] |
| 57 | */ |
| 58 | |
| 59 | #include <stdio.h> |
| 60 | #include <time.h> |
| 61 | |
| 62 | #include "cryptlib.h" |
| 63 | #include "asn1_locl.h" |
| 64 | |
| 65 | #ifndef NO_SYS_TYPES_H |
| 66 | # include <sys/types.h> |
| 67 | #endif |
| 68 | |
| 69 | #include <openssl/bn.h> |
| 70 | #include <openssl/x509.h> |
| 71 | #include <openssl/objects.h> |
| 72 | #include <openssl/buffer.h> |
| 73 | #include <openssl/evp.h> |
| 74 | |
| 75 | #ifndef NO_ASN1_OLD |
| 76 | |
| 77 | int ASN1_verify(i2d_of_void *i2d, X509_ALGOR *a, ASN1_BIT_STRING *signature, |
| 78 | char *data, EVP_PKEY *pkey) |
| 79 | { |
| 80 | EVP_MD_CTX ctx; |
| 81 | const EVP_MD *type; |
| 82 | unsigned char *p,*buf_in=NULL; |
| 83 | int ret= -1,i,inl; |
| 84 | |
| 85 | EVP_MD_CTX_init(&ctx); |
| 86 | i=OBJ_obj2nid(a->algorithm); |
| 87 | type=EVP_get_digestbyname(OBJ_nid2sn(i)); |
| 88 | if (type == NULL) |
| 89 | { |
| 90 | ASN1err(ASN1_F_ASN1_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); |
| 91 | goto err; |
| 92 | } |
| 93 | |
| 94 | inl=i2d(data,NULL); |
| 95 | buf_in=OPENSSL_malloc((unsigned int)inl); |
| 96 | if (buf_in == NULL) |
| 97 | { |
| 98 | ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_MALLOC_FAILURE); |
| 99 | goto err; |
| 100 | } |
| 101 | p=buf_in; |
| 102 | |
| 103 | i2d(data,&p); |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 104 | EVP_VerifyInit_ex(&ctx,type, NULL); |
| 105 | EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 106 | |
| 107 | OPENSSL_cleanse(buf_in,(unsigned int)inl); |
| 108 | OPENSSL_free(buf_in); |
| 109 | |
| 110 | if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data, |
| 111 | (unsigned int)signature->length,pkey) <= 0) |
| 112 | { |
| 113 | ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB); |
| 114 | ret=0; |
| 115 | goto err; |
| 116 | } |
| 117 | /* we don't need to zero the 'ctx' because we just checked |
| 118 | * public information */ |
| 119 | /* memset(&ctx,0,sizeof(ctx)); */ |
| 120 | ret=1; |
| 121 | err: |
| 122 | EVP_MD_CTX_cleanup(&ctx); |
| 123 | return(ret); |
| 124 | } |
| 125 | |
| 126 | #endif |
| 127 | |
| 128 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 129 | int ASN1_item_verify(const ASN1_ITEM *it, X509_ALGOR *a, ASN1_BIT_STRING *signature, |
| 130 | void *asn, EVP_PKEY *pkey) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 131 | { |
| 132 | EVP_MD_CTX ctx; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 133 | const EVP_MD *type = NULL; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 134 | unsigned char *buf_in=NULL; |
| 135 | int ret= -1,inl; |
| 136 | |
| 137 | int mdnid, pknid; |
| 138 | |
| 139 | EVP_MD_CTX_init(&ctx); |
| 140 | |
| 141 | /* Convert signature OID into digest and public key OIDs */ |
| 142 | if (!OBJ_find_sigid_algs(OBJ_obj2nid(a->algorithm), &mdnid, &pknid)) |
| 143 | { |
| 144 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM); |
| 145 | goto err; |
| 146 | } |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 147 | type=EVP_get_digestbynid(mdnid); |
| 148 | if (type == NULL) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 149 | { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 150 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); |
| 151 | goto err; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 152 | } |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 153 | |
| 154 | /* Check public key OID matches public key type */ |
| 155 | if (EVP_PKEY_type(pknid) != pkey->ameth->pkey_id) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 156 | { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 157 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ASN1_R_WRONG_PUBLIC_KEY_TYPE); |
| 158 | goto err; |
| 159 | } |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 160 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 161 | if (!EVP_VerifyInit_ex(&ctx,type, NULL)) |
| 162 | { |
| 163 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ERR_R_EVP_LIB); |
| 164 | ret=0; |
| 165 | goto err; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | inl = ASN1_item_i2d(asn, &buf_in, it); |
| 169 | |
| 170 | if (buf_in == NULL) |
| 171 | { |
| 172 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ERR_R_MALLOC_FAILURE); |
| 173 | goto err; |
| 174 | } |
| 175 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 176 | EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 177 | |
| 178 | OPENSSL_cleanse(buf_in,(unsigned int)inl); |
| 179 | OPENSSL_free(buf_in); |
| 180 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 181 | if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data, |
| 182 | (unsigned int)signature->length,pkey) <= 0) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 183 | { |
| 184 | ASN1err(ASN1_F_ASN1_ITEM_VERIFY,ERR_R_EVP_LIB); |
| 185 | ret=0; |
| 186 | goto err; |
| 187 | } |
| 188 | /* we don't need to zero the 'ctx' because we just checked |
| 189 | * public information */ |
| 190 | /* memset(&ctx,0,sizeof(ctx)); */ |
| 191 | ret=1; |
| 192 | err: |
| 193 | EVP_MD_CTX_cleanup(&ctx); |
| 194 | return(ret); |
| 195 | } |
| 196 | |
| 197 | |