Adam Langley | 95c29f3 | 2014-06-20 12:00:00 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 2 | * All rights reserved. |
| 3 | * |
| 4 | * This package is an SSL implementation written |
| 5 | * by Eric Young (eay@cryptsoft.com). |
| 6 | * The implementation was written so as to conform with Netscapes SSL. |
| 7 | * |
| 8 | * This library is free for commercial and non-commercial use as long as |
| 9 | * the following conditions are aheared to. The following conditions |
| 10 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 12 | * included with this distribution is covered by the same copyright terms |
| 13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 14 | * |
| 15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 16 | * the code are not to be removed. |
| 17 | * If this package is used in a product, Eric Young should be given attribution |
| 18 | * as the author of the parts of the library used. |
| 19 | * This can be in the form of a textual message at program startup or |
| 20 | * in documentation (online or textual) provided with the package. |
| 21 | * |
| 22 | * Redistribution and use in source and binary forms, with or without |
| 23 | * modification, are permitted provided that the following conditions |
| 24 | * are met: |
| 25 | * 1. Redistributions of source code must retain the copyright |
| 26 | * notice, this list of conditions and the following disclaimer. |
| 27 | * 2. Redistributions in binary form must reproduce the above copyright |
| 28 | * notice, this list of conditions and the following disclaimer in the |
| 29 | * documentation and/or other materials provided with the distribution. |
| 30 | * 3. All advertising materials mentioning features or use of this software |
| 31 | * must display the following acknowledgement: |
| 32 | * "This product includes cryptographic software written by |
| 33 | * Eric Young (eay@cryptsoft.com)" |
| 34 | * The word 'cryptographic' can be left out if the rouines from the library |
| 35 | * being used are not cryptographic related :-). |
| 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 37 | * the apps directory (application code) you must include an acknowledgement: |
| 38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 39 | * |
| 40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 50 | * SUCH DAMAGE. |
| 51 | * |
| 52 | * The licence and distribution terms for any publically available version or |
| 53 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 54 | * copied and put under another distribution licence |
| 55 | * [including the GNU Public Licence.] */ |
| 56 | |
| 57 | #include <openssl/asn1.h> |
| 58 | #include <openssl/digest.h> |
| 59 | #include <openssl/err.h> |
| 60 | #include <openssl/evp.h> |
| 61 | #include <openssl/mem.h> |
| 62 | #include <openssl/obj.h> |
| 63 | #include <openssl/x509.h> |
| 64 | |
| 65 | #include "../evp/internal.h" |
| 66 | |
| 67 | |
| 68 | /* TODO(fork): this code appears to be dead. */ |
| 69 | #if 0 |
| 70 | #ifndef NO_ASN1_OLD |
| 71 | |
| 72 | int ASN1_sign(i2d_of_void *i2d, X509_ALGOR *algor1, X509_ALGOR *algor2, |
| 73 | ASN1_BIT_STRING *signature, char *data, EVP_PKEY *pkey, |
| 74 | const EVP_MD *type) |
| 75 | { |
| 76 | EVP_MD_CTX ctx; |
| 77 | unsigned char *p,*buf_in=NULL,*buf_out=NULL; |
| 78 | int i,inl=0,outl=0,outll=0; |
| 79 | X509_ALGOR *a; |
| 80 | |
| 81 | EVP_MD_CTX_init(&ctx); |
| 82 | for (i=0; i<2; i++) |
| 83 | { |
| 84 | if (i == 0) |
| 85 | a=algor1; |
| 86 | else |
| 87 | a=algor2; |
| 88 | if (a == NULL) continue; |
| 89 | if (type->pkey_type == NID_dsaWithSHA1) |
| 90 | { |
| 91 | /* special case: RFC 2459 tells us to omit 'parameters' |
| 92 | * with id-dsa-with-sha1 */ |
| 93 | ASN1_TYPE_free(a->parameter); |
| 94 | a->parameter = NULL; |
| 95 | } |
| 96 | else if ((a->parameter == NULL) || |
| 97 | (a->parameter->type != V_ASN1_NULL)) |
| 98 | { |
| 99 | ASN1_TYPE_free(a->parameter); |
| 100 | if ((a->parameter=ASN1_TYPE_new()) == NULL) goto err; |
| 101 | a->parameter->type=V_ASN1_NULL; |
| 102 | } |
| 103 | ASN1_OBJECT_free(a->algorithm); |
| 104 | a->algorithm=OBJ_nid2obj(type->pkey_type); |
| 105 | if (a->algorithm == NULL) |
| 106 | { |
| 107 | OPENSSL_PUT_ERROR(ASN1, XXX, ASN1_R_UNKNOWN_OBJECT_TYPE); |
| 108 | goto err; |
| 109 | } |
| 110 | if (a->algorithm->length == 0) |
| 111 | { |
| 112 | OPENSSL_PUT_ERROR(ASN1, XXX, ASN1_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD); |
| 113 | goto err; |
| 114 | } |
| 115 | } |
| 116 | inl=i2d(data,NULL); |
| 117 | buf_in=(unsigned char *)OPENSSL_malloc((unsigned int)inl); |
| 118 | outll=outl=EVP_PKEY_size(pkey); |
| 119 | buf_out=(unsigned char *)OPENSSL_malloc((unsigned int)outl); |
| 120 | if ((buf_in == NULL) || (buf_out == NULL)) |
| 121 | { |
| 122 | outl=0; |
| 123 | OPENSSL_PUT_ERROR(ASN1, XXX, ERR_R_MALLOC_FAILURE); |
| 124 | goto err; |
| 125 | } |
| 126 | p=buf_in; |
| 127 | |
| 128 | i2d(data,&p); |
| 129 | if (!EVP_SignInit_ex(&ctx,type, NULL) |
| 130 | || !EVP_SignUpdate(&ctx,(unsigned char *)buf_in,inl) |
| 131 | || !EVP_SignFinal(&ctx,(unsigned char *)buf_out, |
| 132 | (unsigned int *)&outl,pkey)) |
| 133 | { |
| 134 | outl=0; |
| 135 | OPENSSL_PUT_ERROR(ASN1, XXX, ERR_R_EVP_LIB); |
| 136 | goto err; |
| 137 | } |
| 138 | if (signature->data != NULL) OPENSSL_free(signature->data); |
| 139 | signature->data=buf_out; |
| 140 | buf_out=NULL; |
| 141 | signature->length=outl; |
| 142 | /* In the interests of compatibility, I'll make sure that |
| 143 | * the bit string has a 'not-used bits' value of 0 |
| 144 | */ |
| 145 | signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); |
| 146 | signature->flags|=ASN1_STRING_FLAG_BITS_LEFT; |
| 147 | err: |
| 148 | EVP_MD_CTX_cleanup(&ctx); |
| 149 | if (buf_in != NULL) |
| 150 | { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); } |
| 151 | if (buf_out != NULL) |
| 152 | { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); } |
| 153 | return(outl); |
| 154 | } |
| 155 | |
| 156 | #endif |
| 157 | #endif |
| 158 | |
| 159 | int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, X509_ALGOR *algor2, |
| 160 | ASN1_BIT_STRING *signature, void *asn, EVP_PKEY *pkey, |
| 161 | const EVP_MD *type) |
| 162 | { |
| 163 | EVP_MD_CTX ctx; |
| 164 | EVP_MD_CTX_init(&ctx); |
| 165 | if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey)) |
| 166 | { |
| 167 | EVP_MD_CTX_cleanup(&ctx); |
| 168 | return 0; |
| 169 | } |
| 170 | return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx); |
| 171 | } |
| 172 | |
| 173 | |
| 174 | int ASN1_item_sign_ctx(const ASN1_ITEM *it, |
| 175 | X509_ALGOR *algor1, X509_ALGOR *algor2, |
| 176 | ASN1_BIT_STRING *signature, void *asn, EVP_MD_CTX *ctx) |
| 177 | { |
| 178 | const EVP_MD *type; |
| 179 | EVP_PKEY *pkey; |
| 180 | unsigned char *buf_in=NULL,*buf_out=NULL; |
| 181 | size_t inl=0,outl=0,outll=0; |
| 182 | int signid, paramtype; |
| 183 | int rv; |
| 184 | |
| 185 | type = EVP_MD_CTX_md(ctx); |
| 186 | pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx); |
| 187 | |
| 188 | if (!type || !pkey) |
| 189 | { |
| 190 | OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, X509_R_CONTEXT_NOT_INITIALISED); |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | if (pkey->ameth->item_sign) |
| 195 | { |
| 196 | rv = pkey->ameth->item_sign(ctx, it, asn, algor1, algor2, |
| 197 | signature); |
| 198 | if (rv == 1) |
| 199 | outl = signature->length; |
| 200 | /* Return value meanings: |
| 201 | * <=0: error. |
| 202 | * 1: method does everything. |
| 203 | * 2: carry on as normal. |
| 204 | * 3: ASN1 method sets algorithm identifiers: just sign. |
| 205 | */ |
| 206 | if (rv <= 0) |
| 207 | OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_EVP_LIB); |
| 208 | if (rv <= 1) |
| 209 | goto err; |
| 210 | } |
| 211 | else |
| 212 | rv = 2; |
| 213 | |
| 214 | if (rv == 2) |
| 215 | { |
| 216 | /* TODO(fork): EVP_MD_FLAG_PKEY_METHOD_SIGNATURE seems to mean |
| 217 | * "is SHA". */ |
| 218 | if (!pkey->ameth || |
| 219 | !OBJ_find_sigid_by_algs(&signid, |
| 220 | EVP_MD_type(type), |
| 221 | pkey->ameth->pkey_id)) |
| 222 | { |
| 223 | OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, X509_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); |
| 224 | return 0; |
| 225 | } |
| 226 | |
| 227 | if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL) |
| 228 | paramtype = V_ASN1_NULL; |
| 229 | else |
| 230 | paramtype = V_ASN1_UNDEF; |
| 231 | |
| 232 | if (algor1) |
| 233 | X509_ALGOR_set0(algor1, OBJ_nid2obj(signid), paramtype, NULL); |
| 234 | if (algor2) |
| 235 | X509_ALGOR_set0(algor2, OBJ_nid2obj(signid), paramtype, NULL); |
| 236 | |
| 237 | } |
| 238 | |
| 239 | inl=ASN1_item_i2d(asn,&buf_in, it); |
| 240 | outll=outl=EVP_PKEY_size(pkey); |
| 241 | buf_out=OPENSSL_malloc((unsigned int)outl); |
| 242 | if ((buf_in == NULL) || (buf_out == NULL)) |
| 243 | { |
| 244 | outl=0; |
| 245 | OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_MALLOC_FAILURE); |
| 246 | goto err; |
| 247 | } |
| 248 | |
| 249 | if (!EVP_DigestSignUpdate(ctx, buf_in, inl) |
| 250 | || !EVP_DigestSignFinal(ctx, buf_out, &outl)) |
| 251 | { |
| 252 | outl=0; |
| 253 | OPENSSL_PUT_ERROR(X509, ASN1_item_sign_ctx, ERR_R_EVP_LIB); |
| 254 | goto err; |
| 255 | } |
| 256 | if (signature->data != NULL) OPENSSL_free(signature->data); |
| 257 | signature->data=buf_out; |
| 258 | buf_out=NULL; |
| 259 | signature->length=outl; |
| 260 | /* In the interests of compatibility, I'll make sure that |
| 261 | * the bit string has a 'not-used bits' value of 0 |
| 262 | */ |
| 263 | signature->flags&= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); |
| 264 | signature->flags|=ASN1_STRING_FLAG_BITS_LEFT; |
| 265 | err: |
| 266 | EVP_MD_CTX_cleanup(ctx); |
| 267 | if (buf_in != NULL) |
| 268 | { OPENSSL_cleanse((char *)buf_in,(unsigned int)inl); OPENSSL_free(buf_in); } |
| 269 | if (buf_out != NULL) |
| 270 | { OPENSSL_cleanse((char *)buf_out,outll); OPENSSL_free(buf_out); } |
| 271 | return(outl); |
| 272 | } |