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/digest.h> |
| 58 | |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 59 | #include <string.h> |
| 60 | |
Steven Valdez | b0b45c6 | 2017-01-17 16:23:54 -0500 | [diff] [blame] | 61 | #include <openssl/asn1.h> |
Robert Sloan | 6d0d00e | 2017-03-27 07:13:07 -0700 | [diff] [blame] | 62 | #include <openssl/bytestring.h> |
Steven Valdez | b0b45c6 | 2017-01-17 16:23:54 -0500 | [diff] [blame] | 63 | #include <openssl/nid.h> |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 64 | |
| 65 | #include "internal.h" |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 66 | #include "../internal.h" |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 67 | |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 68 | |
| 69 | struct nid_to_digest { |
| 70 | int nid; |
| 71 | const EVP_MD* (*md_func)(void); |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 72 | const char *short_name; |
| 73 | const char *long_name; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 74 | }; |
| 75 | |
| 76 | static const struct nid_to_digest nid_to_digest_mapping[] = { |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 77 | {NID_md4, EVP_md4, SN_md4, LN_md4}, |
| 78 | {NID_md5, EVP_md5, SN_md5, LN_md5}, |
| 79 | {NID_sha1, EVP_sha1, SN_sha1, LN_sha1}, |
| 80 | {NID_sha224, EVP_sha224, SN_sha224, LN_sha224}, |
| 81 | {NID_sha256, EVP_sha256, SN_sha256, LN_sha256}, |
| 82 | {NID_sha384, EVP_sha384, SN_sha384, LN_sha384}, |
| 83 | {NID_sha512, EVP_sha512, SN_sha512, LN_sha512}, |
| 84 | {NID_md5_sha1, EVP_md5_sha1, SN_md5_sha1, LN_md5_sha1}, |
| 85 | /* As a remnant of signing |EVP_MD|s, OpenSSL returned the corresponding |
| 86 | * hash function when given a signature OID. To avoid unintended lax parsing |
| 87 | * of hash OIDs, this is no longer supported for lookup by OID or NID. |
| 88 | * Node.js, however, exposes |EVP_get_digestbyname|'s full behavior to |
| 89 | * consumers so we retain it there. */ |
| 90 | {NID_undef, EVP_sha1, SN_dsaWithSHA, LN_dsaWithSHA}, |
| 91 | {NID_undef, EVP_sha1, SN_dsaWithSHA1, LN_dsaWithSHA1}, |
| 92 | {NID_undef, EVP_sha1, SN_ecdsa_with_SHA1, NULL}, |
| 93 | {NID_undef, EVP_md5, SN_md5WithRSAEncryption, LN_md5WithRSAEncryption}, |
| 94 | {NID_undef, EVP_sha1, SN_sha1WithRSAEncryption, LN_sha1WithRSAEncryption}, |
| 95 | {NID_undef, EVP_sha224, SN_sha224WithRSAEncryption, |
| 96 | LN_sha224WithRSAEncryption}, |
| 97 | {NID_undef, EVP_sha256, SN_sha256WithRSAEncryption, |
| 98 | LN_sha256WithRSAEncryption}, |
| 99 | {NID_undef, EVP_sha384, SN_sha384WithRSAEncryption, |
| 100 | LN_sha384WithRSAEncryption}, |
| 101 | {NID_undef, EVP_sha512, SN_sha512WithRSAEncryption, |
| 102 | LN_sha512WithRSAEncryption}, |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 103 | }; |
| 104 | |
| 105 | const EVP_MD* EVP_get_digestbynid(int nid) { |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 106 | if (nid == NID_undef) { |
| 107 | /* Skip the |NID_undef| entries in |nid_to_digest_mapping|. */ |
| 108 | return NULL; |
| 109 | } |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 110 | |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 111 | for (unsigned i = 0; i < OPENSSL_ARRAY_SIZE(nid_to_digest_mapping); i++) { |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 112 | if (nid_to_digest_mapping[i].nid == nid) { |
| 113 | return nid_to_digest_mapping[i].md_func(); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | return NULL; |
| 118 | } |
| 119 | |
Steven Valdez | b0b45c6 | 2017-01-17 16:23:54 -0500 | [diff] [blame] | 120 | static const struct { |
| 121 | uint8_t oid[9]; |
| 122 | uint8_t oid_len; |
| 123 | const EVP_MD *(*md_func) (void); |
| 124 | } kMDOIDs[] = { |
| 125 | /* 1.2.840.113549.2.4 */ |
| 126 | { {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x04}, 8, EVP_md4 }, |
| 127 | /* 1.2.840.113549.2.5 */ |
| 128 | { {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05}, 8, EVP_md5 }, |
| 129 | /* 1.3.14.3.2.26 */ |
| 130 | { {0x2b, 0x0e, 0x03, 0x02, 0x1a}, 5, EVP_sha1 }, |
| 131 | /* 2.16.840.1.101.3.4.2.1 */ |
| 132 | { {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01}, 9, EVP_sha256 }, |
| 133 | /* 2.16.840.1.101.3.4.2.2 */ |
| 134 | { {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02}, 9, EVP_sha384 }, |
| 135 | /* 2.16.840.1.101.3.4.2.3 */ |
| 136 | { {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03}, 9, EVP_sha512 }, |
| 137 | /* 2.16.840.1.101.3.4.2.4 */ |
| 138 | { {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04}, 9, EVP_sha224 }, |
| 139 | }; |
| 140 | |
Robert Sloan | 6d0d00e | 2017-03-27 07:13:07 -0700 | [diff] [blame] | 141 | static const EVP_MD *cbs_to_md(const CBS *cbs) { |
| 142 | for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(kMDOIDs); i++) { |
| 143 | if (CBS_len(cbs) == kMDOIDs[i].oid_len && |
| 144 | OPENSSL_memcmp(CBS_data(cbs), kMDOIDs[i].oid, kMDOIDs[i].oid_len) == |
| 145 | 0) { |
| 146 | return kMDOIDs[i].md_func(); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | return NULL; |
| 151 | } |
| 152 | |
Steven Valdez | b0b45c6 | 2017-01-17 16:23:54 -0500 | [diff] [blame] | 153 | const EVP_MD *EVP_get_digestbyobj(const ASN1_OBJECT *obj) { |
Robert Sloan | 47f43ed | 2017-02-06 14:55:15 -0800 | [diff] [blame] | 154 | /* Handle objects with no corresponding OID. */ |
| 155 | if (obj->nid != NID_undef) { |
| 156 | return EVP_get_digestbynid(obj->nid); |
| 157 | } |
| 158 | |
Robert Sloan | 6d0d00e | 2017-03-27 07:13:07 -0700 | [diff] [blame] | 159 | CBS cbs; |
| 160 | CBS_init(&cbs, obj->data, obj->length); |
| 161 | return cbs_to_md(&cbs); |
| 162 | } |
| 163 | |
| 164 | const EVP_MD *EVP_parse_digest_algorithm(CBS *cbs) { |
| 165 | CBS algorithm, oid; |
| 166 | if (!CBS_get_asn1(cbs, &algorithm, CBS_ASN1_SEQUENCE) || |
| 167 | !CBS_get_asn1(&algorithm, &oid, CBS_ASN1_OBJECT)) { |
| 168 | OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_DECODE_ERROR); |
| 169 | return NULL; |
| 170 | } |
| 171 | |
| 172 | const EVP_MD *ret = cbs_to_md(&oid); |
| 173 | if (ret == NULL) { |
| 174 | OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_UNKNOWN_HASH); |
| 175 | return NULL; |
| 176 | } |
| 177 | |
| 178 | /* The parameters, if present, must be NULL. Historically, whether the NULL |
| 179 | * was included or omitted was not well-specified. When parsing an |
| 180 | * AlgorithmIdentifier, we allow both. (Note this code is not used when |
| 181 | * verifying RSASSA-PKCS1-v1_5 signatures.) */ |
| 182 | if (CBS_len(&algorithm) > 0) { |
| 183 | CBS param; |
| 184 | if (!CBS_get_asn1(&algorithm, ¶m, CBS_ASN1_NULL) || |
| 185 | CBS_len(¶m) != 0 || |
| 186 | CBS_len(&algorithm) != 0) { |
| 187 | OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_DECODE_ERROR); |
| 188 | return NULL; |
Steven Valdez | b0b45c6 | 2017-01-17 16:23:54 -0500 | [diff] [blame] | 189 | } |
| 190 | } |
| 191 | |
Robert Sloan | 6d0d00e | 2017-03-27 07:13:07 -0700 | [diff] [blame] | 192 | return ret; |
Adam Langley | d9e397b | 2015-01-22 14:27:53 -0800 | [diff] [blame] | 193 | } |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 194 | |
| 195 | const EVP_MD *EVP_get_digestbyname(const char *name) { |
Robert Sloan | 69939df | 2017-01-09 10:53:07 -0800 | [diff] [blame] | 196 | for (unsigned i = 0; i < OPENSSL_ARRAY_SIZE(nid_to_digest_mapping); i++) { |
Adam Langley | f4e4272 | 2015-06-04 17:45:09 -0700 | [diff] [blame] | 197 | const char *short_name = nid_to_digest_mapping[i].short_name; |
| 198 | const char *long_name = nid_to_digest_mapping[i].long_name; |
| 199 | if ((short_name && strcmp(short_name, name) == 0) || |
| 200 | (long_name && strcmp(long_name, name) == 0)) { |
| 201 | return nid_to_digest_mapping[i].md_func(); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | return NULL; |
| 206 | } |