Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [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 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 65 | #include "internal.h" |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 66 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 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 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 79 | |
| 80 | int ASN1_item_sign_ctx(const ASN1_ITEM *it, |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 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, outll = 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 87 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 88 | pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 89 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 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 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 97 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 98 | inl = ASN1_item_i2d(asn, &buf_in, it); |
| 99 | outll = 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 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 106 | |
Robert Sloan | 8ff0355 | 2017-06-14 12:40:58 -0700 | [diff] [blame^] | 107 | if (!EVP_DigestSign(ctx, buf_out, &outl, buf_in, inl)) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 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 | if (buf_in != NULL) { |
| 126 | OPENSSL_cleanse((char *)buf_in, (unsigned int)inl); |
| 127 | OPENSSL_free(buf_in); |
| 128 | } |
| 129 | if (buf_out != NULL) { |
| 130 | OPENSSL_cleanse((char *)buf_out, outll); |
| 131 | OPENSSL_free(buf_out); |
| 132 | } |
| 133 | return (outl); |
| 134 | } |