/* crypto/asn1/a_sign.c */ /* Copyright (C) 1995-1998 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 "cryptlib.h" #ifndef NO_SYS_TYPES_H # include <sys/types.h> #endif #include <openssl/bn.h> #include <openssl/evp.h> #include <openssl/x509.h> #include <openssl/objects.h> #include <openssl/buffer.h> int ASN1_sign(int (*i2d)(), X509_ALGOR *algor1, X509_ALGOR *algor2, ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey, const EVP_MD *type) { EVP_MD_CTX ctx; unsigned char *p,*buf_in=NULL,*buf_out=NULL; int i,inl=0,outl=0,outll=0; X509_ALGOR *a; for (i=0; i<2; i++) { if (i == 0) a=algor1; else a=algor2; if (a == NULL) continue; if ( (a->parameter == NULL) || (a->parameter->type != V_ASN1_NULL)) { ASN1_TYPE_free(a->parameter); if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err; a->parameter->type=V_ASN1_NULL; } ASN1_OBJECT_free(a->algorithm); a->algorithm=OBJ_nid2obj(type->pkey_type); if (a->algorithm == NULL) { ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE); goto err; } if (a->algorithm->length == 0) { ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); goto err; } } inl=i2d(data,NULL); buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl); outll=outl=EVP_PKEY_size(pkey); buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl); if ((buf_in == NULL) || (buf_out == NULL)) { outl=0; ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE); goto err; } p=buf_in; i2d(data,&p); EVP_SignInit(&ctx,type); EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl); if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out, (unsigned int *)&outl,pkey)) { outl=0; ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB); goto err; } if (signature->data != NULL) OPENSSL_free(signature->data); signature->data=buf_out; buf_out=NULL; signature->length=outl; /* In the interests of compatibility, I'll make sure that * the bit string has a 'not-used bits' value of 0 */ signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); signature->flags|=ASN1_STRING_FLAG_BITS_LEFT; err: memset(&ctx,0,sizeof(ctx)); if (buf_in != NULL) { memset((char *)buf_in,0,(unsigned int)inl); OPENSSL_free(buf_in); } if (buf_out != NULL) { memset((char *)buf_out,0,outll); OPENSSL_free(buf_out); } return(outl); }