a_sign.c revision 59191
155714Skris/* crypto/asn1/a_sign.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 855714Skris * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1555714Skris * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 2255714Skris * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 3755714Skris * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4055714Skris * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 5255714Skris * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include <time.h> 6155714Skris 6255714Skris#include "cryptlib.h" 6359191Skris 6459191Skris#ifndef NO_SYS_TYPES_H 6559191Skris# include <sys/types.h> 6659191Skris#endif 6759191Skris 6855714Skris#include <openssl/bn.h> 6955714Skris#include <openssl/evp.h> 7055714Skris#include <openssl/x509.h> 7155714Skris#include <openssl/objects.h> 7255714Skris#include <openssl/buffer.h> 7355714Skris 7455714Skrisint ASN1_sign(int (*i2d)(), X509_ALGOR *algor1, X509_ALGOR *algor2, 7555714Skris ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey, 7655714Skris const EVP_MD *type) 7755714Skris { 7855714Skris EVP_MD_CTX ctx; 7955714Skris unsigned char *p,*buf_in=NULL,*buf_out=NULL; 8055714Skris int i,inl=0,outl=0,outll=0; 8155714Skris X509_ALGOR *a; 8255714Skris 8355714Skris for (i=0; i<2; i++) 8455714Skris { 8555714Skris if (i == 0) 8655714Skris a=algor1; 8755714Skris else 8855714Skris a=algor2; 8955714Skris if (a == NULL) continue; 9055714Skris if ( (a->parameter == NULL) || 9155714Skris (a->parameter->type != V_ASN1_NULL)) 9255714Skris { 9355714Skris ASN1_TYPE_free(a->parameter); 9455714Skris if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err; 9555714Skris a->parameter->type=V_ASN1_NULL; 9655714Skris } 9755714Skris ASN1_OBJECT_free(a->algorithm); 9855714Skris a->algorithm=OBJ_nid2obj(type->pkey_type); 9955714Skris if (a->algorithm == NULL) 10055714Skris { 10155714Skris ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE); 10255714Skris goto err; 10355714Skris } 10455714Skris if (a->algorithm->length == 0) 10555714Skris { 10655714Skris ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); 10755714Skris goto err; 10855714Skris } 10955714Skris } 11055714Skris inl=i2d(data,NULL); 11155714Skris buf_in=(unsigned char *)Malloc((unsigned int)inl); 11255714Skris outll=outl=EVP_PKEY_size(pkey); 11355714Skris buf_out=(unsigned char *)Malloc((unsigned int)outl); 11455714Skris if ((buf_in == NULL) || (buf_out == NULL)) 11555714Skris { 11655714Skris outl=0; 11755714Skris ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE); 11855714Skris goto err; 11955714Skris } 12055714Skris p=buf_in; 12155714Skris 12255714Skris i2d(data,&p); 12355714Skris EVP_SignInit(&ctx,type); 12455714Skris EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl); 12555714Skris if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out, 12655714Skris (unsigned int *)&outl,pkey)) 12755714Skris { 12855714Skris outl=0; 12955714Skris ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB); 13055714Skris goto err; 13155714Skris } 13259191Skris if (signature->data != NULL) Free(signature->data); 13355714Skris signature->data=buf_out; 13455714Skris buf_out=NULL; 13555714Skris signature->length=outl; 13659191Skris /* In the interests of compatibility, I'll make sure that 13755714Skris * the bit string has a 'not-used bits' value of 0 13855714Skris */ 13955714Skris signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); 14055714Skris signature->flags|=ASN1_STRING_FLAG_BITS_LEFT; 14155714Skriserr: 14255714Skris memset(&ctx,0,sizeof(ctx)); 14355714Skris if (buf_in != NULL) 14459191Skris { memset((char *)buf_in,0,(unsigned int)inl); Free(buf_in); } 14555714Skris if (buf_out != NULL) 14659191Skris { memset((char *)buf_out,0,outll); Free(buf_out); } 14755714Skris return(outl); 14855714Skris } 149