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Commit | Line | Data |
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0f113f3e | 1 | /* |
b0edda11 | 2 | * Copyright 2007-2018 The OpenSSL Project Authors. All Rights Reserved. |
74633553 | 3 | * |
d2e9e320 RS |
4 | * Licensed under the OpenSSL license (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 | |
74633553 DSH |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
b39fc560 | 11 | #include "internal/cryptlib.h" |
74633553 | 12 | #include <openssl/evp.h> |
5fe736e5 | 13 | #include "internal/asn1_int.h" |
e32b52a2 | 14 | #include "internal/evp_int.h" |
74633553 | 15 | |
0f113f3e MC |
16 | /* |
17 | * HMAC "ASN1" method. This is just here to indicate the maximum HMAC output | |
18 | * length and to free up an HMAC key. | |
74633553 DSH |
19 | */ |
20 | ||
21 | static int hmac_size(const EVP_PKEY *pkey) | |
0f113f3e MC |
22 | { |
23 | return EVP_MAX_MD_SIZE; | |
24 | } | |
74633553 DSH |
25 | |
26 | static void hmac_key_free(EVP_PKEY *pkey) | |
0f113f3e | 27 | { |
3aeb9348 | 28 | ASN1_OCTET_STRING *os = EVP_PKEY_get0(pkey); |
0f113f3e MC |
29 | if (os) { |
30 | if (os->data) | |
31 | OPENSSL_cleanse(os->data, os->length); | |
32 | ASN1_OCTET_STRING_free(os); | |
33 | } | |
34 | } | |
74633553 | 35 | |
e69adea5 | 36 | static int hmac_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) |
0f113f3e MC |
37 | { |
38 | switch (op) { | |
39 | case ASN1_PKEY_CTRL_DEFAULT_MD_NID: | |
40 | *(int *)arg2 = NID_sha256; | |
41 | return 1; | |
42 | ||
43 | default: | |
44 | return -2; | |
45 | } | |
46 | } | |
e69adea5 | 47 | |
3b92e518 NM |
48 | static int hmac_pkey_public_cmp(const EVP_PKEY *a, const EVP_PKEY *b) |
49 | { | |
50 | return ASN1_OCTET_STRING_cmp(EVP_PKEY_get0(a), EVP_PKEY_get0(b)); | |
51 | } | |
52 | ||
e32b52a2 MC |
53 | static int hmac_set_priv_key(EVP_PKEY *pkey, const unsigned char *priv, |
54 | size_t len) | |
55 | { | |
56 | ASN1_OCTET_STRING *os; | |
57 | ||
58 | if (pkey->pkey.ptr != NULL) | |
59 | return 0; | |
60 | ||
61 | os = ASN1_OCTET_STRING_new(); | |
62 | if (os == NULL) | |
63 | return 0; | |
64 | ||
65 | ||
66 | if (!ASN1_OCTET_STRING_set(os, priv, len)) { | |
67 | ASN1_OCTET_STRING_free(os); | |
68 | return 0; | |
69 | } | |
70 | ||
71 | pkey->pkey.ptr = os; | |
72 | return 1; | |
73 | } | |
74 | ||
0f113f3e MC |
75 | const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = { |
76 | EVP_PKEY_HMAC, | |
77 | EVP_PKEY_HMAC, | |
78 | 0, | |
74633553 | 79 | |
0f113f3e MC |
80 | "HMAC", |
81 | "OpenSSL HMAC method", | |
74633553 | 82 | |
3b92e518 | 83 | 0, 0, hmac_pkey_public_cmp, 0, |
74633553 | 84 | |
0f113f3e | 85 | 0, 0, 0, |
74633553 | 86 | |
0f113f3e MC |
87 | hmac_size, |
88 | 0, 0, | |
89 | 0, 0, 0, 0, 0, 0, 0, | |
74633553 | 90 | |
0f113f3e MC |
91 | hmac_key_free, |
92 | hmac_pkey_ctrl, | |
e32b52a2 MC |
93 | NULL, |
94 | NULL, | |
95 | ||
96 | NULL, | |
97 | NULL, | |
98 | NULL, | |
99 | ||
100 | NULL, | |
101 | NULL, | |
102 | NULL, | |
103 | ||
104 | hmac_set_priv_key, | |
105 | NULL, | |
0f113f3e | 106 | }; |