a_sign.c revision 296465
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 if (i == 0) 141 a = algor1; 142 else 143 a = algor2; 144 if (a == NULL) 145 continue; 146 if (type->pkey_type == NID_dsaWithSHA1) { 147 /* 148 * special case: RFC 2459 tells us to omit 'parameters' with 149 * id-dsa-with-sha1 150 */ 151 ASN1_TYPE_free(a->parameter); 152 a->parameter = NULL; 153 } else if ((a->parameter == NULL) || 154 (a->parameter->type != V_ASN1_NULL)) { 155 ASN1_TYPE_free(a->parameter); 156 if ((a->parameter = ASN1_TYPE_new()) == NULL) 157 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 ASN1err(ASN1_F_ASN1_SIGN, ASN1_R_UNKNOWN_OBJECT_TYPE); 164 goto err; 165 } 166 if (a->algorithm->length == 0) { 167 ASN1err(ASN1_F_ASN1_SIGN, 168 ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); 169 goto err; 170 } 171 } 172 inl = i2d(data, NULL); 173 buf_in = (unsigned char *)OPENSSL_malloc((unsigned int)inl); 174 outll = outl = EVP_PKEY_size(pkey); 175 buf_out = (unsigned char *)OPENSSL_malloc((unsigned int)outl); 176 if ((buf_in == NULL) || (buf_out == NULL)) { 177 outl = 0; 178 ASN1err(ASN1_F_ASN1_SIGN, ERR_R_MALLOC_FAILURE); 179 goto err; 180 } 181 p = buf_in; 182 183 i2d(data, &p); 184 EVP_SignInit_ex(&ctx, type, NULL); 185 EVP_SignUpdate(&ctx, (unsigned char *)buf_in, inl); 186 if (!EVP_SignFinal(&ctx, (unsigned char *)buf_out, 187 (unsigned int *)&outl, pkey)) { 188 outl = 0; 189 ASN1err(ASN1_F_ASN1_SIGN, ERR_R_EVP_LIB); 190 goto err; 191 } 192 if (signature->data != NULL) 193 OPENSSL_free(signature->data); 194 signature->data = buf_out; 195 buf_out = NULL; 196 signature->length = outl; 197 /* 198 * In the interests of compatibility, I'll make sure that the bit string 199 * has a 'not-used bits' value of 0 200 */ 201 signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); 202 signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; 203 err: 204 EVP_MD_CTX_cleanup(&ctx); 205 if (buf_in != NULL) { 206 OPENSSL_cleanse((char *)buf_in, (unsigned int)inl); 207 OPENSSL_free(buf_in); 208 } 209 if (buf_out != NULL) { 210 OPENSSL_cleanse((char *)buf_out, outll); 211 OPENSSL_free(buf_out); 212 } 213 return (outl); 214} 215 216#endif 217 218int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, 219 X509_ALGOR *algor2, ASN1_BIT_STRING *signature, void *asn, 220 EVP_PKEY *pkey, const EVP_MD *type) 221{ 222 EVP_MD_CTX ctx; 223 unsigned char *buf_in = NULL, *buf_out = NULL; 224 int i, inl = 0, outl = 0, outll = 0; 225 X509_ALGOR *a; 226 227 EVP_MD_CTX_init(&ctx); 228 for (i = 0; i < 2; i++) { 229 if (i == 0) 230 a = algor1; 231 else 232 a = algor2; 233 if (a == NULL) 234 continue; 235 if (type->pkey_type == NID_dsaWithSHA1 || 236 type->pkey_type == NID_ecdsa_with_SHA1) { 237 /* 238 * special case: RFC 3279 tells us to omit 'parameters' with 239 * id-dsa-with-sha1 and ecdsa-with-SHA1 240 */ 241 ASN1_TYPE_free(a->parameter); 242 a->parameter = NULL; 243 } else if ((a->parameter == NULL) || 244 (a->parameter->type != V_ASN1_NULL)) { 245 ASN1_TYPE_free(a->parameter); 246 if ((a->parameter = ASN1_TYPE_new()) == NULL) 247 goto err; 248 a->parameter->type = V_ASN1_NULL; 249 } 250 ASN1_OBJECT_free(a->algorithm); 251 a->algorithm = OBJ_nid2obj(type->pkey_type); 252 if (a->algorithm == NULL) { 253 ASN1err(ASN1_F_ASN1_ITEM_SIGN, ASN1_R_UNKNOWN_OBJECT_TYPE); 254 goto err; 255 } 256 if (a->algorithm->length == 0) { 257 ASN1err(ASN1_F_ASN1_ITEM_SIGN, 258 ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); 259 goto err; 260 } 261 } 262 inl = ASN1_item_i2d(asn, &buf_in, it); 263 outll = outl = EVP_PKEY_size(pkey); 264 buf_out = (unsigned char *)OPENSSL_malloc((unsigned int)outl); 265 if ((buf_in == NULL) || (buf_out == NULL)) { 266 outl = 0; 267 ASN1err(ASN1_F_ASN1_ITEM_SIGN, ERR_R_MALLOC_FAILURE); 268 goto err; 269 } 270 271 if (!EVP_SignInit_ex(&ctx, type, NULL)) { 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 outl = 0; 280 ASN1err(ASN1_F_ASN1_ITEM_SIGN, ERR_R_EVP_LIB); 281 goto err; 282 } 283 if (signature->data != NULL) 284 OPENSSL_free(signature->data); 285 signature->data = buf_out; 286 buf_out = NULL; 287 signature->length = outl; 288 /* 289 * In the interests of compatibility, I'll make sure that the bit string 290 * has a 'not-used bits' value of 0 291 */ 292 signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); 293 signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; 294 err: 295 EVP_MD_CTX_cleanup(&ctx); 296 if (buf_in != NULL) { 297 OPENSSL_cleanse((char *)buf_in, (unsigned int)inl); 298 OPENSSL_free(buf_in); 299 } 300 if (buf_out != NULL) { 301 OPENSSL_cleanse((char *)buf_out, outll); 302 OPENSSL_free(buf_out); 303 } 304 return (outl); 305} 306