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1 | /* |
2 | * Copyright 2020 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 <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" | |
16 | ||
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) | |
20 | { | |
21 | size_t i; | |
22 | ||
23 | if (meth != NULL) | |
24 | for (i = 0; i < items_n; i++) | |
25 | if (meth_is_a(meth, items[i].ptr)) | |
26 | return (int)items[i].id; | |
27 | return NID_undef; | |
28 | } | |
29 | ||
30 | static const char *nid2name(int meth, const OSSL_ITEM *items, size_t items_n) | |
31 | { | |
32 | size_t i; | |
33 | ||
34 | for (i = 0; i < items_n; i++) | |
35 | if (meth == (int)items[i].id) | |
36 | return items[i].ptr; | |
37 | return NULL; | |
38 | } | |
39 | ||
40 | /* | |
41 | * The list of permitted hash functions are taken from | |
42 | * https://tools.ietf.org/html/rfc8017#appendix-A.2.1: | |
43 | * | |
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 -- | |
53 | * } | |
54 | */ | |
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 }, | |
63 | }; | |
64 | ||
65 | static int md_is_a(const void *md, const char *name) | |
66 | { | |
67 | return EVP_MD_is_a(md, name); | |
68 | } | |
69 | ||
23b2fc0b | 70 | int ossl_rsa_oaeppss_md2nid(const EVP_MD *md) |
e9d6186e RL |
71 | { |
72 | return meth2nid(md, md_is_a, | |
73 | oaeppss_name_nid_map, OSSL_NELEM(oaeppss_name_nid_map)); | |
74 | } | |
75 | ||
23b2fc0b | 76 | const char *ossl_rsa_oaeppss_nid2name(int md) |
e9d6186e RL |
77 | { |
78 | return nid2name(md, oaeppss_name_nid_map, OSSL_NELEM(oaeppss_name_nid_map)); | |
79 | } | |
80 | ||
23b2fc0b | 81 | const char *ossl_rsa_mgf_nid2name(int mgf) |
e9d6186e RL |
82 | { |
83 | if (mgf == NID_mgf1) | |
84 | return SN_mgf1; | |
85 | return NULL; | |
86 | } |