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