diff options
Diffstat (limited to 'crypto/asn1/a_verify.c')
| -rw-r--r-- | crypto/asn1/a_verify.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/crypto/asn1/a_verify.c b/crypto/asn1/a_verify.c new file mode 100644 index 0000000000..567552f782 --- /dev/null +++ b/crypto/asn1/a_verify.c @@ -0,0 +1,121 @@ +/* crypto/asn1/a_verify.c */ +/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include <time.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include "cryptlib.h" +#include "bn.h" +#include "x509.h" +#include "objects.h" +#include "buffer.h" +#include "evp.h" +#include "pem.h" + +int ASN1_verify(i2d,a,signature,data,pkey) +int (*i2d)(); +X509_ALGOR *a; +ASN1_BIT_STRING *signature; +char *data; +EVP_PKEY *pkey; + { + EVP_MD_CTX ctx; + EVP_MD *type; + unsigned char *p,*buf_in=NULL; + int ret= -1,i,inl; + + i=OBJ_obj2nid(a->algorithm); + type=EVP_get_digestbyname(OBJ_nid2sn(i)); + if (type == NULL) + { + ASN1err(ASN1_F_ASN1_VERIFY,ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); + goto err; + } + + inl=i2d(data,NULL); + buf_in=(unsigned char *)Malloc((unsigned int)inl); + if (buf_in == NULL) + { + ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_MALLOC_FAILURE); + goto err; + } + p=buf_in; + + i2d(data,&p); + EVP_VerifyInit(&ctx,type); + EVP_VerifyUpdate(&ctx,(unsigned char *)buf_in,inl); + + memset(buf_in,0,(unsigned int)inl); + Free((char *)buf_in); + + if (EVP_VerifyFinal(&ctx,(unsigned char *)signature->data, + (unsigned int)signature->length,pkey) <= 0) + { + ASN1err(ASN1_F_ASN1_VERIFY,ERR_R_EVP_LIB); + ret=0; + goto err; + } + /* we don't need to zero the 'ctx' because we just checked + * public information */ + /* memset(&ctx,0,sizeof(ctx)); */ + ret=1; +err: + return(ret); + } |