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/*
* Copyright 2020 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 <openssl/core.h>
#include <openssl/core_names.h>
#include <openssl/evp.h>
#include <openssl/obj_mac.h>
#include "internal/nelem.h"
#include "crypto/rsa.h"
static int meth2nid(const void *meth,
int (*meth_is_a)(const void *meth, const char *name),
const OSSL_ITEM *items, size_t items_n)
{
size_t i;
if (meth != NULL)
for (i = 0; i < items_n; i++)
if (meth_is_a(meth, items[i].ptr))
return (int)items[i].id;
return NID_undef;
}
static const char *nid2name(int meth, const OSSL_ITEM *items, size_t items_n)
{
size_t i;
for (i = 0; i < items_n; i++)
if (meth == (int)items[i].id)
return items[i].ptr;
return NULL;
}
/*
* The list of permitted hash functions are taken from
* https://tools.ietf.org/html/rfc8017#appendix-A.2.1:
*
* OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= {
* { OID id-sha1 PARAMETERS NULL }|
* { OID id-sha224 PARAMETERS NULL }|
* { OID id-sha256 PARAMETERS NULL }|
* { OID id-sha384 PARAMETERS NULL }|
* { OID id-sha512 PARAMETERS NULL }|
* { OID id-sha512-224 PARAMETERS NULL }|
* { OID id-sha512-256 PARAMETERS NULL },
* ... -- Allows for future expansion --
* }
*/
static const OSSL_ITEM oaeppss_name_nid_map[] = {
{ 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 },
};
static int md_is_a(const void *md, const char *name)
{
return EVP_MD_is_a(md, name);
}
int ossl_rsa_oaeppss_md2nid(const EVP_MD *md)
{
return meth2nid(md, md_is_a,
oaeppss_name_nid_map, OSSL_NELEM(oaeppss_name_nid_map));
}
const char *ossl_rsa_oaeppss_nid2name(int md)
{
return nid2name(md, oaeppss_name_nid_map, OSSL_NELEM(oaeppss_name_nid_map));
}
const char *ossl_rsa_mgf_nid2name(int mgf)
{
if (mgf == NID_mgf1)
return SN_mgf1;
return NULL;
}
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