Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 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 | #include "asn1_locl.h" |
| 127 | |
| 128 | #ifndef NO_ASN1_OLD |
| 129 | |
| 130 | int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2, |
| 131 | ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey, |
| 132 | const EVP_MD *type) |
| 133 | { |
| 134 | EVP_MD_CTX ctx; |
| 135 | unsigned char *p,*buf_in=NULL,*buf_out=NULL; |
| 136 | int i,inl=0,outl=0,outll=0; |
| 137 | X509_ALGOR *a; |
| 138 | |
| 139 | EVP_MD_CTX_init(&ctx); |
| 140 | for (i=0; i<2; i++) |
| 141 | { |
| 142 | if (i == 0) |
| 143 | a=algor1; |
| 144 | else |
| 145 | a=algor2; |
| 146 | if (a == NULL) continue; |
| 147 | if (type->pkey_type == NID_dsaWithSHA1) |
| 148 | { |
| 149 | /* special case: RFC 2459 tells us to omit 'parameters' |
| 150 | * with id-dsa-with-sha1 */ |
| 151 | ASN1_TYPE_free(a->parameter); |
| 152 | a->parameter = NULL; |
| 153 | } |
| 154 | else if ((a->parameter == NULL) || |
| 155 | (a->parameter->type != V_ASN1_NULL)) |
| 156 | { |
| 157 | ASN1_TYPE_free(a->parameter); |
| 158 | if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err; |
| 159 | a->parameter->type=V_ASN1_NULL; |
| 160 | } |
| 161 | ASN1_OBJECT_free(a->algorithm); |
| 162 | a->algorithm=OBJ_nid2obj(type->pkey_type); |
| 163 | if (a->algorithm == NULL) |
| 164 | { |
| 165 | ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_UNKNOWN_OBJECT_TYPE); |
| 166 | goto err; |
| 167 | } |
| 168 | if (a->algorithm->length == 0) |
| 169 | { |
| 170 | ASN1err(ASN1_F_ASN1_SIGN,ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); |
| 171 | goto err; |
| 172 | } |
| 173 | } |
| 174 | inl=i2d(data,NULL); |
| 175 | buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl); |
| 176 | outll=outl=EVP_PKEY_size(pkey); |
| 177 | buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl); |
| 178 | if ((buf_in == NULL) || (buf_out == NULL)) |
| 179 | { |
| 180 | outl=0; |
| 181 | ASN1err(ASN1_F_ASN1_SIGN,ERR_R_MALLOC_FAILURE); |
| 182 | goto err; |
| 183 | } |
| 184 | p=buf_in; |
| 185 | |
| 186 | i2d(data,&p); |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 187 | EVP_SignInit_ex(&ctx,type, NULL); |
| 188 | EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl); |
| 189 | if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out, |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 190 | (unsigned int *)&outl,pkey)) |
| 191 | { |
| 192 | outl=0; |
| 193 | ASN1err(ASN1_F_ASN1_SIGN,ERR_R_EVP_LIB); |
| 194 | goto err; |
| 195 | } |
| 196 | if (signature->data != NULL) OPENSSL_free(signature->data); |
| 197 | signature->data=buf_out; |
| 198 | buf_out=NULL; |
| 199 | signature->length=outl; |
| 200 | /* In the interests of compatibility, I'll make sure that |
| 201 | * the bit string has a 'not-used bits' value of 0 |
| 202 | */ |
| 203 | signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); |
| 204 | signature->flags|=ASN1_STRING_FLAG_BITS_LEFT; |
| 205 | err: |
| 206 | EVP_MD_CTX_cleanup(&ctx); |
| 207 | if (buf_in != NULL) |
| 208 | { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); } |
| 209 | if (buf_out != NULL) |
| 210 | { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); } |
| 211 | return(outl); |
| 212 | } |
| 213 | |
| 214 | #endif |
| 215 | |
| 216 | int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2, |
| 217 | ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey, |
| 218 | const EVP_MD *type) |
| 219 | { |
| 220 | EVP_MD_CTX ctx; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 221 | unsigned char *buf_in=NULL,*buf_out=NULL; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 222 | int inl=0,outl=0,outll=0; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 223 | int signid, paramtype; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 224 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 225 | if (type == NULL) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 226 | { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 227 | int def_nid; |
| 228 | if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) > 0) |
| 229 | type = EVP_get_digestbynid(def_nid); |
| 230 | } |
| 231 | |
| 232 | if (type == NULL) |
| 233 | { |
| 234 | ASN1err(ASN1_F_ASN1_ITEM_SIGN, ASN1_R_NO_DEFAULT_DIGEST); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 235 | return 0; |
| 236 | } |
| 237 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 238 | if (type->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 239 | { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 240 | if (!pkey->ameth || |
| 241 | !OBJ_find_sigid_by_algs(&signid, EVP_MD_nid(type), |
| 242 | pkey->ameth->pkey_id)) |
| 243 | { |
| 244 | ASN1err(ASN1_F_ASN1_ITEM_SIGN, |
| 245 | ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); |
| 246 | return 0; |
| 247 | } |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 248 | } |
| 249 | else |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 250 | signid = type->pkey_type; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 251 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 252 | if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL) |
| 253 | paramtype = V_ASN1_NULL; |
| 254 | else |
| 255 | paramtype = V_ASN1_UNDEF; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 256 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 257 | if (algor1) |
| 258 | X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL); |
| 259 | if (algor2) |
| 260 | X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 261 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 262 | EVP_MD_CTX_init(&ctx); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 263 | inl=ASN1_item_i2d(asn,&buf_in, it); |
| 264 | outll=outl=EVP_PKEY_size(pkey); |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 265 | buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 266 | if ((buf_in == NULL) || (buf_out == NULL)) |
| 267 | { |
| 268 | outl=0; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 269 | ASN1err(ASN1_F_ASN1_ITEM_SIGN,ERR_R_MALLOC_FAILURE); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 270 | goto err; |
| 271 | } |
| 272 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 273 | EVP_SignInit_ex(&ctx,type, NULL); |
| 274 | EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl); |
| 275 | if (!EVP_SignFinal(&ctx,(unsigned char *)buf_out, |
| 276 | (unsigned int *)&outl,pkey)) |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 277 | { |
| 278 | outl=0; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 279 | ASN1err(ASN1_F_ASN1_ITEM_SIGN,ERR_R_EVP_LIB); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 280 | goto err; |
| 281 | } |
| 282 | if (signature->data != NULL) OPENSSL_free(signature->data); |
| 283 | signature->data=buf_out; |
| 284 | buf_out=NULL; |
| 285 | signature->length=outl; |
| 286 | /* In the interests of compatibility, I'll make sure that |
| 287 | * the bit string has a 'not-used bits' value of 0 |
| 288 | */ |
| 289 | signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); |
| 290 | signature->flags|=ASN1_STRING_FLAG_BITS_LEFT; |
| 291 | err: |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 292 | EVP_MD_CTX_cleanup(&ctx); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 293 | if (buf_in != NULL) |
| 294 | { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); } |
| 295 | if (buf_out != NULL) |
| 296 | { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); } |
| 297 | return(outl); |
| 298 | } |