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 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 57 | #include <openssl/x509.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 58 | |
| 59 | #include <openssl/asn1.h> |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 60 | #include <openssl/digest.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 61 | #include <openssl/err.h> |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 62 | #include <openssl/evp.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 63 | #include <openssl/obj.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 64 | |
| 65 | #include "internal.h" |
| 66 | |
| 67 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 68 | int x509_digest_sign_algorithm(EVP_MD_CTX *ctx, X509_ALGOR *algor) { |
| 69 | const EVP_MD *digest = EVP_MD_CTX_md(ctx); |
| 70 | EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx); |
| 71 | if (digest == NULL || pkey == NULL) { |
| 72 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_CONTEXT_NOT_INITIALISED); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 73 | return 0; |
| 74 | } |
| 75 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 76 | if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) { |
| 77 | int pad_mode; |
| 78 | if (!EVP_PKEY_CTX_get_rsa_padding(ctx->pctx, &pad_mode)) { |
| 79 | return 0; |
| 80 | } |
| 81 | /* RSA-PSS has special signature algorithm logic. */ |
| 82 | if (pad_mode == RSA_PKCS1_PSS_PADDING) { |
| 83 | return x509_rsa_ctx_to_pss(ctx, algor); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 84 | } |
| 85 | } |
| 86 | |
| 87 | /* Default behavior: look up the OID for the algorithm/hash pair and encode |
| 88 | * that. */ |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 89 | int sign_nid; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 90 | if (!OBJ_find_sigid_by_algs(&sign_nid, EVP_MD_type(digest), |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 91 | EVP_PKEY_id(pkey))) { |
| 92 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 93 | return 0; |
| 94 | } |
| 95 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 96 | /* RSA signature algorithms include an explicit NULL parameter. Others omit |
| 97 | * it. */ |
| 98 | int paramtype = |
| 99 | (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) ? V_ASN1_NULL : V_ASN1_UNDEF; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 100 | X509_ALGOR_set0(algor, OBJ_nid2obj(sign_nid), paramtype, NULL); |
| 101 | return 1; |
| 102 | } |
| 103 | |
Robert Sloan | 572a4e2 | 2017-04-17 10:52:19 -0700 | [diff] [blame] | 104 | int x509_digest_verify_init(EVP_PKEY_CTX *ctx, X509_ALGOR *sigalg) { |
| 105 | if (!EVP_PKEY_verify_init(ctx)) { |
| 106 | return 0; |
| 107 | } |
| 108 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 109 | /* Convert the signature OID into digest and public key OIDs. */ |
| 110 | int sigalg_nid = OBJ_obj2nid(sigalg->algorithm); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 111 | int digest_nid, pkey_nid; |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 112 | if (!OBJ_find_sigid_algs(sigalg_nid, &digest_nid, &pkey_nid)) { |
| 113 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 114 | return 0; |
| 115 | } |
| 116 | |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 117 | /* Check the public key OID matches the public key type. */ |
Robert Sloan | 572a4e2 | 2017-04-17 10:52:19 -0700 | [diff] [blame] | 118 | EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(ctx); |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 119 | if (pkey_nid != EVP_PKEY_id(pkey)) { |
| 120 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_WRONG_PUBLIC_KEY_TYPE); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | /* NID_undef signals that there are custom parameters to set. */ |
| 125 | if (digest_nid == NID_undef) { |
Robert Sloan | 572a4e2 | 2017-04-17 10:52:19 -0700 | [diff] [blame] | 126 | if (sigalg_nid == NID_rsassaPss) { |
| 127 | return x509_rsa_pss_to_ctx(ctx, sigalg); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 128 | } |
Robert Sloan | 572a4e2 | 2017-04-17 10:52:19 -0700 | [diff] [blame] | 129 | if (sigalg_nid == NID_Ed25519) { |
| 130 | if (sigalg->parameter != NULL) { |
| 131 | OPENSSL_PUT_ERROR(X509, X509_R_INVALID_PARAMETER); |
| 132 | return 0; |
| 133 | } |
| 134 | return 1; /* Nothing to configure. */ |
| 135 | } |
| 136 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_SIGNATURE_ALGORITHM); |
| 137 | return 0; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 138 | } |
| 139 | |
| 140 | /* Otherwise, initialize with the digest from the OID. */ |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 141 | const EVP_MD *digest = EVP_get_digestbynid(digest_nid); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 142 | if (digest == NULL) { |
David Benjamin | 4969cc9 | 2016-04-22 15:02:23 -0400 | [diff] [blame] | 143 | OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 144 | return 0; |
| 145 | } |
| 146 | |
Robert Sloan | 572a4e2 | 2017-04-17 10:52:19 -0700 | [diff] [blame] | 147 | return EVP_PKEY_CTX_set_signature_md(ctx, digest); |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 148 | } |