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  * Copyright (c) 1998-2003 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111
 112 #include <stdio.h>
 113 #include <time.h>
 114
 115 #include "cryptlib.h"
 116
 117 #ifndef NO_SYS_TYPES_H
 118 # include <sys/types.h>
 119 #endif
 120
 121 #include <openssl/bn.h>
 122 #include <openssl/evp.h>
 123 #include <openssl/x509.h>
 124 #include <openssl/objects.h>
 125 #include <openssl/buffer.h>
 126
 127 #ifndef NO_ASN1_OLD
 128
 129 int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2,
 130               ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey,
 131               const EVP_MD *type)
 132         {
 133         EVP_MD_CTX ctx;
 134         unsigned char *p,*buf_in=NULL,*buf_out=NULL;
 135         int i,inl=0,outl=0,outll=0;
 136         X509_ALGOR *a;
 137
 138         EVP_MD_CTX_init(&ctx);
 139         for (i=0; i<2; i++)
 140                 {
 141                 if (i == 0)
 142                         a=algor1;
 143                 else
 144                         a=algor2;
 145                 if (a == NULL) continue;
 146                 if (type->pkey_type == NID_dsaWithSHA1)
 147                         {
 148                         /* special case: RFC 2459 tells us to omit 'parameters'
 149                          * with id-dsa-with-sha1 */
 150                         ASN1_TYPE_free(a->parameter);
 151                         a->parameter = NULL;
 152                         }
 153                 else if ((a->parameter == NULL) ||
 154                         (a->parameter->type != V_ASN1_NULL))
 155                         {
 156                         ASN1_TYPE_free(a->parameter);
 157                         if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
 158                         a->parameter->type=V_ASN1_NULL;
 159                         }
 160                 ASN1_OBJECT_free(a->algorithm);
 161                 a->algorithm=OBJ_nid2obj(type->pkey_type);
 162                 if (a->algorithm == NULL)
 163                         {
 164                         ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE);
 165                         goto err;
 166                         }
 167                 if (a->algorithm->length == 0)
 168                         {
 169                         ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
 170                         goto err;
 171                         }
 172                 }
 173         inl=i2d(data,NULL);
 174         buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl);
 175         outll=outl=EVP_PKEY_size(pkey);
 176         buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
 177         if ((buf_in == NULL) || (buf_out == NULL))
 178                 {
 179                 outl=0;
 180                 ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE);
 181                 goto err;
 182                 }
 183         p=buf_in;
 184
 185         i2d(data,&p);
 186         EVP_SignInit_ex(&ctx,type, NULL);
 187         EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl);
 188         if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out,
 189                         (unsigned int *)&outl,pkey))
 190                 {
 191                 outl=0;
 192                 ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB);
 193                 goto err;
 194                 }
 195         if (signature->data != NULL) OPENSSL_free(signature->data);
 196         signature->data=buf_out;
 197         buf_out=NULL;
 198         signature->length=outl;
 199         /* In the interests of compatibility, I'll make sure that
 200          * the bit string has a 'not-used bits' value of 0
 201          */
 202         signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 203         signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
 204 err:
 205         EVP_MD_CTX_cleanup(&ctx);
 206         if (buf_in != NULL)
 207                 { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
 208         if (buf_out != NULL)
 209                 { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
 210         return(outl);
 211         }
 212
 213 #endif
 214
 215 int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2,
 216              ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey,
 217              const EVP_MD *type)
 218         {
 219         EVP_MD_CTX ctx;
 220         unsigned char *buf_in=NULL,*buf_out=NULL;
 221         int i,inl=0,outl=0,outll=0;
 222         X509_ALGOR *a;
 223
 224         EVP_MD_CTX_init(&ctx);
 225         for (i=0; i<2; i++)
 226                 {
 227                 if (i == 0)
 228                         a=algor1;
 229                 else
 230                         a=algor2;
 231                 if (a == NULL) continue;
 232                 if (type->pkey_type == NID_dsaWithSHA1 ||
 233                         type->pkey_type == NID_ecdsa_with_SHA1)
 234                         {
 235                         /* special case: RFC 3279 tells us to omit 'parameters'
 236                          * with id-dsa-with-sha1 and ecdsa-with-SHA1 */
 237                         ASN1_TYPE_free(a->parameter);
 238                         a->parameter = NULL;
 239                         }
 240                 else if ((a->parameter == NULL) ||
 241                         (a->parameter->type != V_ASN1_NULL))
 242                         {
 243                         ASN1_TYPE_free(a->parameter);
 244                         if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err;
 245                         a->parameter->type=V_ASN1_NULL;
 246                         }
 247                 ASN1_OBJECT_free(a->algorithm);
 248                 a->algorithm=OBJ_nid2obj(type->pkey_type);
 249                 if (a->algorithm == NULL)
 250                         {
 251                         ASN1err(ASN1_F_ASN1_ITEM_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE);
 252                         goto err;
 253                         }
 254                 if (a->algorithm->length == 0)
 255                         {
 256                         ASN1err(ASN1_F_ASN1_ITEM_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
 257                         goto err;
 258                         }
 259                 }
 260         inl=ASN1_item_i2d(asn,&buf_in, it);
 261         outll=outl=EVP_PKEY_size(pkey);
 262         buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl);
 263         if ((buf_in == NULL) || (buf_out == NULL))
 264                 {
 265                 outl=0;
 266                 ASN1err(ASN1_F_ASN1_ITEM_SIGN,ERR_R_MALLOC_FAILURE);
 267                 goto err;
 268                 }
 269
 270         EVP_SignInit_ex(&ctx,type, NULL);
 271         EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl);
 272         if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out,
 273                         (unsigned int *)&outl,pkey))
 274                 {
 275                 outl=0;
 276                 ASN1err(ASN1_F_ASN1_ITEM_SIGN,ERR_R_EVP_LIB);
 277                 goto err;
 278                 }
 279         if (signature->data != NULL) OPENSSL_free(signature->data);
 280         signature->data=buf_out;
 281         buf_out=NULL;
 282         signature->length=outl;
 283         /* In the interests of compatibility, I'll make sure that
 284          * the bit string has a 'not-used bits' value of 0
 285          */
 286         signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07);
 287         signature->flags|=ASN1_STRING_FLAG_BITS_LEFT;
 288 err:
 289         EVP_MD_CTX_cleanup(&ctx);
 290         if (buf_in != NULL)
 291                 { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); }
 292         if (buf_out != NULL)
 293                 { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); }
 294         return(outl);
 295         }