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e9d6186e05
The scheme currently added is OAEP-PSSDigestAlgorithms codified. The translator functions translate an EVP_MD into a NID, and a NID into a name, to support the creation and parsing of OSSL_PARAM items. Reviewed-by: Shane Lontis <shane.lontis@oracle.com> (Merged from https://github.com/openssl/openssl/pull/11710)
87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
/*
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* Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/core.h>
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#include <openssl/core_names.h>
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#include <openssl/evp.h>
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#include <openssl/obj_mac.h>
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#include "internal/nelem.h"
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#include "crypto/rsa.h"
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static int meth2nid(const void *meth,
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int (*meth_is_a)(const void *meth, const char *name),
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const OSSL_ITEM *items, size_t items_n)
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{
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size_t i;
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if (meth != NULL)
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for (i = 0; i < items_n; i++)
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if (meth_is_a(meth, items[i].ptr))
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return (int)items[i].id;
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return NID_undef;
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}
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static const char *nid2name(int meth, const OSSL_ITEM *items, size_t items_n)
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{
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size_t i;
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for (i = 0; i < items_n; i++)
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if (meth == (int)items[i].id)
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return items[i].ptr;
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return NULL;
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}
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/*
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* The list of permitted hash functions are taken from
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* https://tools.ietf.org/html/rfc8017#appendix-A.2.1:
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*
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* OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= {
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* { OID id-sha1 PARAMETERS NULL }|
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* { OID id-sha224 PARAMETERS NULL }|
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* { OID id-sha256 PARAMETERS NULL }|
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* { OID id-sha384 PARAMETERS NULL }|
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* { OID id-sha512 PARAMETERS NULL }|
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* { OID id-sha512-224 PARAMETERS NULL }|
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* { OID id-sha512-256 PARAMETERS NULL },
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* ... -- Allows for future expansion --
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* }
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*/
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static const OSSL_ITEM oaeppss_name_nid_map[] = {
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{ NID_sha1, OSSL_DIGEST_NAME_SHA1 },
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{ NID_sha224, OSSL_DIGEST_NAME_SHA2_224 },
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{ NID_sha256, OSSL_DIGEST_NAME_SHA2_256 },
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{ NID_sha384, OSSL_DIGEST_NAME_SHA2_384 },
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{ NID_sha512, OSSL_DIGEST_NAME_SHA2_512 },
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{ NID_sha512_224, OSSL_DIGEST_NAME_SHA2_512_224 },
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{ NID_sha512_256, OSSL_DIGEST_NAME_SHA2_512_256 },
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};
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static int md_is_a(const void *md, const char *name)
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{
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return EVP_MD_is_a(md, name);
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}
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int rsa_oaeppss_md2nid(const EVP_MD *md)
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{
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return meth2nid(md, md_is_a,
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oaeppss_name_nid_map, OSSL_NELEM(oaeppss_name_nid_map));
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}
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const char *rsa_oaeppss_nid2name(int md)
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{
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return nid2name(md, oaeppss_name_nid_map, OSSL_NELEM(oaeppss_name_nid_map));
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}
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const char *rsa_mgf_nid2name(int mgf)
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{
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if (mgf == NID_mgf1)
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return SN_mgf1;
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return NULL;
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}
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