1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 "internal.h" 66 67 int ASN1_item_sign(const ASN1_ITEM *it, X509_ALGOR *algor1, 68 X509_ALGOR *algor2, ASN1_BIT_STRING *signature, void *asn, 69 EVP_PKEY *pkey, const EVP_MD *type) 70 { 71 EVP_MD_CTX ctx; 72 EVP_MD_CTX_init(&ctx); 73 if (!EVP_DigestSignInit(&ctx, NULL, type, NULL, pkey)) { 74 EVP_MD_CTX_cleanup(&ctx); 75 return 0; 76 } 77 return ASN1_item_sign_ctx(it, algor1, algor2, signature, asn, &ctx); 78 } 79 80 int ASN1_item_sign_ctx(const ASN1_ITEM *it, 81 X509_ALGOR *algor1, X509_ALGOR *algor2, 82 ASN1_BIT_STRING *signature, void *asn, EVP_MD_CTX *ctx) 83 { 84 EVP_PKEY *pkey; 85 unsigned char *buf_in = NULL, *buf_out = NULL; 86 size_t inl = 0, outl = 0; 87 88 pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx); 89 90 /* Write out the requested copies of the AlgorithmIdentifier. */ 91 if (algor1 && !x509_digest_sign_algorithm(ctx, algor1)) { 92 goto err; 93 } 94 if (algor2 && !x509_digest_sign_algorithm(ctx, algor2)) { 95 goto err; 96 } 97 98 inl = ASN1_item_i2d(asn, &buf_in, it); 99 outl = EVP_PKEY_size(pkey); 100 buf_out = OPENSSL_malloc((unsigned int)outl); 101 if ((buf_in == NULL) || (buf_out == NULL)) { 102 outl = 0; 103 OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE); 104 goto err; 105 } 106 107 if (!EVP_DigestSign(ctx, buf_out, &outl, buf_in, inl)) { 108 outl = 0; 109 OPENSSL_PUT_ERROR(X509, ERR_R_EVP_LIB); 110 goto err; 111 } 112 if (signature->data != NULL) 113 OPENSSL_free(signature->data); 114 signature->data = buf_out; 115 buf_out = NULL; 116 signature->length = outl; 117 /* 118 * In the interests of compatibility, I'll make sure that the bit string 119 * has a 'not-used bits' value of 0 120 */ 121 signature->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); 122 signature->flags |= ASN1_STRING_FLAG_BITS_LEFT; 123 err: 124 EVP_MD_CTX_cleanup(ctx); 125 OPENSSL_free(buf_in); 126 OPENSSL_free(buf_out); 127 return (outl); 128 } 129
