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 129int 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; 204err: 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 215int 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 if (!EVP_SignInit_ex(&ctx,type, NULL)) 271 { 272 outl=0; 273 ASN1err(ASN1_F_ASN1_ITEM_SIGN,ERR_R_EVP_LIB); 274 goto err; 275 } 276 EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl); 277 if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out, 278 (unsigned int *)&outl,pkey)) 279 { 280 outl=0; 281 ASN1err(ASN1_F_ASN1_ITEM_SIGN,ERR_R_EVP_LIB); 282 goto err; 283 } 284 if (signature->data != NULL) OPENSSL_free(signature->data); 285 signature->data=buf_out; 286 buf_out=NULL; 287 signature->length=outl; 288 /* In the interests of compatibility, I'll make sure that 289 * the bit string has a 'not-used bits' value of 0 290 */ 291 signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); 292 signature->flags|=ASN1_STRING_FLAG_BITS_LEFT; 293err: 294 EVP_MD_CTX_cleanup(&ctx); 295 if (buf_in != NULL) 296 { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); } 297 if (buf_out != NULL) 298 { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); } 299 return(outl); 300 } 301