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/*
* Copyright 2020-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "internal/deprecated.h"
#include <openssl/objects.h>
#include <openssl/core_names.h>
#include <openssl/evp.h>
#include <openssl/core.h>
#include "prov/securitycheck.h"
#include "internal/nelem.h"
/*
* Internal library code deals with NIDs, so we need to translate from a name.
* We do so using EVP_MD_is_a(), and therefore need a name to NID map.
*/
int ossl_digest_md_to_nid(const EVP_MD *md, const OSSL_ITEM *it, size_t it_len)
{
size_t i;
if (md == NULL)
return NID_undef;
for (i = 0; i < it_len; i++)
if (EVP_MD_is_a(md, it[i].ptr))
return (int)it[i].id;
return NID_undef;
}
/*
* Retrieve one of the FIPS approved hash algorithms by nid.
* See FIPS 180-4 "Secure Hash Standard" and FIPS 202 - SHA-3.
*/
int ossl_digest_get_approved_nid(const EVP_MD *md)
{
static const OSSL_ITEM name_to_nid[] = {
{ NID_sha1, OSSL_DIGEST_NAME_SHA1 },
{ NID_sha224, OSSL_DIGEST_NAME_SHA2_224 },
{ NID_sha256, OSSL_DIGEST_NAME_SHA2_256 },
{ NID_sha384, OSSL_DIGEST_NAME_SHA2_384 },
{ NID_sha512, OSSL_DIGEST_NAME_SHA2_512 },
{ NID_sha512_224, OSSL_DIGEST_NAME_SHA2_512_224 },
{ NID_sha512_256, OSSL_DIGEST_NAME_SHA2_512_256 },
{ NID_sha3_224, OSSL_DIGEST_NAME_SHA3_224 },
{ NID_sha3_256, OSSL_DIGEST_NAME_SHA3_256 },
{ NID_sha3_384, OSSL_DIGEST_NAME_SHA3_384 },
{ NID_sha3_512, OSSL_DIGEST_NAME_SHA3_512 },
};
return ossl_digest_md_to_nid(md, name_to_nid, OSSL_NELEM(name_to_nid));
}
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