1 /* 2 * Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include "internal/deprecated.h" 11 12 #include <openssl/objects.h> 13 #include <openssl/core_names.h> 14 #include <openssl/evp.h> 15 #include <openssl/core.h> 16 #include "prov/securitycheck.h" 17 #include "internal/nelem.h" 18 19 /* 20 * Internal library code deals with NIDs, so we need to translate from a name. 21 * We do so using EVP_MD_is_a(), and therefore need a name to NID map. 22 */ 23 int ossl_digest_md_to_nid(const EVP_MD *md, const OSSL_ITEM *it, size_t it_len) 24 { 25 size_t i; 26 27 if (md == NULL) 28 return NID_undef; 29 30 for (i = 0; i < it_len; i++) 31 if (EVP_MD_is_a(md, it[i].ptr)) 32 return (int)it[i].id; 33 return NID_undef; 34 } 35 36 /* 37 * Retrieve one of the FIPS approved hash algorithms by nid. 38 * See FIPS 180-4 "Secure Hash Standard" and FIPS 202 - SHA-3. 39 */ 40 int ossl_digest_get_approved_nid(const EVP_MD *md) 41 { 42 static const OSSL_ITEM name_to_nid[] = { 43 { NID_sha1, OSSL_DIGEST_NAME_SHA1 }, 44 { NID_sha224, OSSL_DIGEST_NAME_SHA2_224 }, 45 { NID_sha256, OSSL_DIGEST_NAME_SHA2_256 }, 46 { NID_sha384, OSSL_DIGEST_NAME_SHA2_384 }, 47 { NID_sha512, OSSL_DIGEST_NAME_SHA2_512 }, 48 { NID_sha512_224, OSSL_DIGEST_NAME_SHA2_512_224 }, 49 { NID_sha512_256, OSSL_DIGEST_NAME_SHA2_512_256 }, 50 { NID_sha3_224, OSSL_DIGEST_NAME_SHA3_224 }, 51 { NID_sha3_256, OSSL_DIGEST_NAME_SHA3_256 }, 52 { NID_sha3_384, OSSL_DIGEST_NAME_SHA3_384 }, 53 { NID_sha3_512, OSSL_DIGEST_NAME_SHA3_512 }, 54 }; 55 56 return ossl_digest_md_to_nid(md, name_to_nid, OSSL_NELEM(name_to_nid)); 57 } 58