2 * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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
10 #include <openssl/core.h>
11 #include <openssl/core_names.h>
12 #include <openssl/evp.h>
13 #include <openssl/obj_mac.h>
14 #include "internal/nelem.h"
15 #include "crypto/rsa.h"
17 static int meth2nid(const void *meth,
18 int (*meth_is_a)(const void *meth, const char *name),
19 const OSSL_ITEM *items, size_t items_n)
24 for (i = 0; i < items_n; i++)
25 if (meth_is_a(meth, items[i].ptr))
26 return (int)items[i].id;
30 static const char *nid2name(int meth, const OSSL_ITEM *items, size_t items_n)
34 for (i = 0; i < items_n; i++)
35 if (meth == (int)items[i].id)
41 * The list of permitted hash functions are taken from
42 * https://tools.ietf.org/html/rfc8017#appendix-A.2.1:
44 * OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= {
45 * { OID id-sha1 PARAMETERS NULL }|
46 * { OID id-sha224 PARAMETERS NULL }|
47 * { OID id-sha256 PARAMETERS NULL }|
48 * { OID id-sha384 PARAMETERS NULL }|
49 * { OID id-sha512 PARAMETERS NULL }|
50 * { OID id-sha512-224 PARAMETERS NULL }|
51 * { OID id-sha512-256 PARAMETERS NULL },
52 * ... -- Allows for future expansion --
55 static const OSSL_ITEM oaeppss_name_nid_map[] = {
56 { NID_sha1, OSSL_DIGEST_NAME_SHA1 },
57 { NID_sha224, OSSL_DIGEST_NAME_SHA2_224 },
58 { NID_sha256, OSSL_DIGEST_NAME_SHA2_256 },
59 { NID_sha384, OSSL_DIGEST_NAME_SHA2_384 },
60 { NID_sha512, OSSL_DIGEST_NAME_SHA2_512 },
61 { NID_sha512_224, OSSL_DIGEST_NAME_SHA2_512_224 },
62 { NID_sha512_256, OSSL_DIGEST_NAME_SHA2_512_256 },
65 static int md_is_a(const void *md, const char *name)
67 return EVP_MD_is_a(md, name);
70 int rsa_oaeppss_md2nid(const EVP_MD *md)
72 return meth2nid(md, md_is_a,
73 oaeppss_name_nid_map, OSSL_NELEM(oaeppss_name_nid_map));
76 const char *rsa_oaeppss_nid2name(int md)
78 return nid2name(md, oaeppss_name_nid_map, OSSL_NELEM(oaeppss_name_nid_map));
81 const char *rsa_mgf_nid2name(int mgf)