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- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.] */
-
- #include <openssl/digest.h>
-
- #include <string.h>
-
- #include <openssl/asn1.h>
- #include <openssl/bytestring.h>
- #include <openssl/nid.h>
-
- #include "../internal.h"
-
-
- struct nid_to_digest {
- int nid;
- const EVP_MD* (*md_func)(void);
- const char *short_name;
- const char *long_name;
- };
-
- static const struct nid_to_digest nid_to_digest_mapping[] = {
- {NID_md4, EVP_md4, SN_md4, LN_md4},
- {NID_md5, EVP_md5, SN_md5, LN_md5},
- {NID_sha1, EVP_sha1, SN_sha1, LN_sha1},
- {NID_sha224, EVP_sha224, SN_sha224, LN_sha224},
- {NID_sha256, EVP_sha256, SN_sha256, LN_sha256},
- {NID_sha384, EVP_sha384, SN_sha384, LN_sha384},
- {NID_sha512, EVP_sha512, SN_sha512, LN_sha512},
- {NID_md5_sha1, EVP_md5_sha1, SN_md5_sha1, LN_md5_sha1},
- // As a remnant of signing |EVP_MD|s, OpenSSL returned the corresponding
- // hash function when given a signature OID. To avoid unintended lax parsing
- // of hash OIDs, this is no longer supported for lookup by OID or NID.
- // Node.js, however, exposes |EVP_get_digestbyname|'s full behavior to
- // consumers so we retain it there.
- {NID_undef, EVP_sha1, SN_dsaWithSHA, LN_dsaWithSHA},
- {NID_undef, EVP_sha1, SN_dsaWithSHA1, LN_dsaWithSHA1},
- {NID_undef, EVP_sha1, SN_ecdsa_with_SHA1, NULL},
- {NID_undef, EVP_md5, SN_md5WithRSAEncryption, LN_md5WithRSAEncryption},
- {NID_undef, EVP_sha1, SN_sha1WithRSAEncryption, LN_sha1WithRSAEncryption},
- {NID_undef, EVP_sha224, SN_sha224WithRSAEncryption,
- LN_sha224WithRSAEncryption},
- {NID_undef, EVP_sha256, SN_sha256WithRSAEncryption,
- LN_sha256WithRSAEncryption},
- {NID_undef, EVP_sha384, SN_sha384WithRSAEncryption,
- LN_sha384WithRSAEncryption},
- {NID_undef, EVP_sha512, SN_sha512WithRSAEncryption,
- LN_sha512WithRSAEncryption},
- };
-
- const EVP_MD* EVP_get_digestbynid(int nid) {
- if (nid == NID_undef) {
- // Skip the |NID_undef| entries in |nid_to_digest_mapping|.
- return NULL;
- }
-
- for (unsigned i = 0; i < OPENSSL_ARRAY_SIZE(nid_to_digest_mapping); i++) {
- if (nid_to_digest_mapping[i].nid == nid) {
- return nid_to_digest_mapping[i].md_func();
- }
- }
-
- return NULL;
- }
-
- static const struct {
- uint8_t oid[9];
- uint8_t oid_len;
- int nid;
- } kMDOIDs[] = {
- // 1.2.840.113549.2.4
- { {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x04}, 8, NID_md4 },
- // 1.2.840.113549.2.5
- { {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05}, 8, NID_md5 },
- // 1.3.14.3.2.26
- { {0x2b, 0x0e, 0x03, 0x02, 0x1a}, 5, NID_sha1 },
- // 2.16.840.1.101.3.4.2.1
- { {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01}, 9, NID_sha256 },
- // 2.16.840.1.101.3.4.2.2
- { {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02}, 9, NID_sha384 },
- // 2.16.840.1.101.3.4.2.3
- { {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03}, 9, NID_sha512 },
- // 2.16.840.1.101.3.4.2.4
- { {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04}, 9, NID_sha224 },
- };
-
- static const EVP_MD *cbs_to_md(const CBS *cbs) {
- for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(kMDOIDs); i++) {
- if (CBS_len(cbs) == kMDOIDs[i].oid_len &&
- OPENSSL_memcmp(CBS_data(cbs), kMDOIDs[i].oid, kMDOIDs[i].oid_len) ==
- 0) {
- return EVP_get_digestbynid(kMDOIDs[i].nid);
- }
- }
-
- return NULL;
- }
-
- const EVP_MD *EVP_get_digestbyobj(const ASN1_OBJECT *obj) {
- // Handle objects with no corresponding OID.
- if (obj->nid != NID_undef) {
- return EVP_get_digestbynid(obj->nid);
- }
-
- CBS cbs;
- CBS_init(&cbs, obj->data, obj->length);
- return cbs_to_md(&cbs);
- }
-
- const EVP_MD *EVP_parse_digest_algorithm(CBS *cbs) {
- CBS algorithm, oid;
- if (!CBS_get_asn1(cbs, &algorithm, CBS_ASN1_SEQUENCE) ||
- !CBS_get_asn1(&algorithm, &oid, CBS_ASN1_OBJECT)) {
- OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_DECODE_ERROR);
- return NULL;
- }
-
- const EVP_MD *ret = cbs_to_md(&oid);
- if (ret == NULL) {
- OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_UNKNOWN_HASH);
- return NULL;
- }
-
- // The parameters, if present, must be NULL. Historically, whether the NULL
- // was included or omitted was not well-specified. When parsing an
- // AlgorithmIdentifier, we allow both. (Note this code is not used when
- // verifying RSASSA-PKCS1-v1_5 signatures.)
- if (CBS_len(&algorithm) > 0) {
- CBS param;
- if (!CBS_get_asn1(&algorithm, ¶m, CBS_ASN1_NULL) ||
- CBS_len(¶m) != 0 ||
- CBS_len(&algorithm) != 0) {
- OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_DECODE_ERROR);
- return NULL;
- }
- }
-
- return ret;
- }
-
- int EVP_marshal_digest_algorithm(CBB *cbb, const EVP_MD *md) {
- CBB algorithm, oid, null;
- if (!CBB_add_asn1(cbb, &algorithm, CBS_ASN1_SEQUENCE) ||
- !CBB_add_asn1(&algorithm, &oid, CBS_ASN1_OBJECT)) {
- OPENSSL_PUT_ERROR(DIGEST, ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- int found = 0;
- int nid = EVP_MD_type(md);
- for (size_t i = 0; i < OPENSSL_ARRAY_SIZE(kMDOIDs); i++) {
- if (nid == kMDOIDs[i].nid) {
- if (!CBB_add_bytes(&oid, kMDOIDs[i].oid, kMDOIDs[i].oid_len)) {
- OPENSSL_PUT_ERROR(DIGEST, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- found = 1;
- break;
- }
- }
-
- if (!found) {
- OPENSSL_PUT_ERROR(DIGEST, DIGEST_R_UNKNOWN_HASH);
- return 0;
- }
-
- if (!CBB_add_asn1(&algorithm, &null, CBS_ASN1_NULL) ||
- !CBB_flush(cbb)) {
- OPENSSL_PUT_ERROR(DIGEST, ERR_R_MALLOC_FAILURE);
- return 0;
- }
-
- return 1;
- }
-
- const EVP_MD *EVP_get_digestbyname(const char *name) {
- for (unsigned i = 0; i < OPENSSL_ARRAY_SIZE(nid_to_digest_mapping); i++) {
- const char *short_name = nid_to_digest_mapping[i].short_name;
- const char *long_name = nid_to_digest_mapping[i].long_name;
- if ((short_name && strcmp(short_name, name) == 0) ||
- (long_name && strcmp(long_name, name) == 0)) {
- return nid_to_digest_mapping[i].md_func();
- }
- }
-
- return NULL;
- }
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