crypto/asn1/a_sign.c

   1 /* crypto/asn1/a_sign.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
  64 #ifndef NO_SYS_TYPES_H
  65 # include <sys/types.h>
  66 #endif
  67
  68 #include <openssl/bn.h>
  69 #include <openssl/evp.h>
  70 #include <openssl/x509.h>
  71 #include <openssl/objects.h>
  72 #include <openssl/buffer.h>
  73
  74 #ifndef NO_ASN1_OLD
  75
  76 int ASN1_sign(int (*i2d)(), X509_ALGOR *algor1, X509_ALGOR *algor2,
  77              ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey,
  78              const EVP_MD *type)
  79         {
  80         EVP_MD_CTX ctx;
  81         unsigned char *p,*buf_in=NULL,*buf_out=NULL;
  82         int i,inl=0,outl=0,outll=0;
  83         X509_ALGOR *a;
  84
  85         for (i=0; i<2; i++)
  86                 {
  87                 if (i == 0)
  88                         a=algor1;
  89                 else
  90                         a=algor2;
  91                 if (a == NULL) continue;
  92                 if (    (a->parameter == NULL) ||
  93                         (a->parameter->type != V_ASN1_NULL))
  94                         {
  95                         ASN1_TYPE_free(a->parameter);
  96                         if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
  97                         a->parameter->type=V_ASN1_NULL;
  98                         }
  99                 ASN1_OBJECT_free(a->algorithm);
 100                 a->algorithm=OBJ_nid2obj(type->pkey_type);
 101                 if (a->algorithm == NULL)
 102                         {
 103                         ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE);
 104                         goto err;
 105                         }
 106                 if (a->algorithm->length == 0)
 107                         {
 108                         ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
 109                         goto err;
 110                         }
 111                 }
 112         inl=i2d(data,NULL);
 113         buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl);
 114         outll=outl=EVP_PKEY_size(pkey);
 115         buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
 116         if ((buf_in == NULL) || (buf_out == NULL))
 117                 {
 118                 outl=0;
 119                 ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE);
 120                 goto err;
 121                 }
 122         p=buf_in;
 123
 124         i2d(data,&p);
 125         EVP_SignInit(&ctx,type);
 126         EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl);
 127         if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out,
 128                         (unsigned int *)&outl,pkey))
 129                 {
 130                 outl=0;
 131                 ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB);
 132                 goto err;
 133                 }
 134         if (signature->data != NULL) OPENSSL_free(signature->data);
 135         signature->data=buf_out;
 136         buf_out=NULL;
 137         signature->length=outl;
 138         /* In the interests of compatibility, I'll make sure that
 139          * the bit string has a 'not-used bits' value of 0
 140          */
 141         signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 142         signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
 143 err:
 144         memset(&ctx,0,sizeof(ctx));
 145         if (buf_in != NULL)
 146                 { memset((char *)buf_in,0,(unsigned int)inl); OPENSSL_free(buf_in); }
 147         if (buf_out != NULL)
 148                 { memset((char *)buf_out,0,outll); OPENSSL_free(buf_out); }
 149         return(outl);
 150         }
 151
 152 #endif
 153
 154 int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
 155              ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey,
 156              const EVP_MD *type)
 157         {
 158         EVP_MD_CTX ctx;
 159         unsigned char *buf_in=NULL,*buf_out=NULL;
 160         int i,inl=0,outl=0,outll=0;
 161         X509_ALGOR *a;
 162
 163         for (i=0; i<2; i++)
 164                 {
 165                 if (i == 0)
 166                         a=algor1;
 167                 else
 168                         a=algor2;
 169                 if (a == NULL) continue;
 170                 if (    (a->parameter == NULL) ||
 171                         (a->parameter->type != V_ASN1_NULL))
 172                         {
 173                         ASN1_TYPE_free(a->parameter);
 174                         if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
 175                         a->parameter->type=V_ASN1_NULL;
 176                         }
 177                 ASN1_OBJECT_free(a->algorithm);
 178                 a->algorithm=OBJ_nid2obj(type->pkey_type);
 179                 if (a->algorithm == NULL)
 180                         {
 181                         ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE);
 182                         goto err;
 183                         }
 184                 if (a->algorithm->length == 0)
 185                         {
 186                         ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
 187                         goto err;
 188                         }
 189                 }
 190         inl=ASN1_item_i2d(asn,&buf_in, it);
 191         outll=outl=EVP_PKEY_size(pkey);
 192         buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
 193         if ((buf_in == NULL) || (buf_out == NULL))
 194                 {
 195                 outl=0;
 196                 ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE);
 197                 goto err;
 198                 }
 199
 200         EVP_SignInit(&ctx,type);
 201         EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl);
 202         if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out,
 203                         (unsigned int *)&outl,pkey))
 204                 {
 205                 outl=0;
 206                 ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB);
 207                 goto err;
 208                 }
 209         if (signature->data != NULL) OPENSSL_free(signature->data);
 210         signature->data=buf_out;
 211         buf_out=NULL;
 212         signature->length=outl;
 213         /* In the interests of compatibility, I'll make sure that
 214          * the bit string has a 'not-used bits' value of 0
 215          */
 216         signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 217         signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
 218 err:
 219         memset(&ctx,0,sizeof(ctx));
 220         if (buf_in != NULL)
 221                 { memset((char *)buf_in,0,(unsigned int)inl); OPENSSL_free(buf_in); }
 222         if (buf_out != NULL)
 223                 { memset((char *)buf_out,0,outll); OPENSSL_free(buf_out); }
 224         return(outl);
 225         }