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Commit | Line | Data |
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52ad5b60 | 1 | /* |
b0edda11 | 2 | * Copyright 2007-2018 The OpenSSL Project Authors. All Rights Reserved. |
52ad5b60 | 3 | * |
49d3b641 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
52ad5b60 TS |
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 <stdio.h> | |
11 | #include "internal/cryptlib.h" | |
12 | #include <openssl/evp.h> | |
25f2138b DMSP |
13 | #include "crypto/asn1.h" |
14 | #include "crypto/poly1305.h" | |
52ad5b60 | 15 | #include "poly1305_local.h" |
25f2138b | 16 | #include "crypto/evp.h" |
52ad5b60 TS |
17 | |
18 | /* | |
19 | * POLY1305 "ASN1" method. This is just here to indicate the maximum | |
20 | * POLY1305 output length and to free up a POLY1305 key. | |
21 | */ | |
22 | ||
23 | static int poly1305_size(const EVP_PKEY *pkey) | |
24 | { | |
25 | return POLY1305_DIGEST_SIZE; | |
26 | } | |
27 | ||
28 | static void poly1305_key_free(EVP_PKEY *pkey) | |
29 | { | |
30 | ASN1_OCTET_STRING *os = EVP_PKEY_get0(pkey); | |
31 | if (os != NULL) { | |
32 | if (os->data != NULL) | |
33 | OPENSSL_cleanse(os->data, os->length); | |
34 | ASN1_OCTET_STRING_free(os); | |
35 | } | |
36 | } | |
37 | ||
38 | static int poly1305_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) | |
39 | { | |
40 | /* nothing, (including ASN1_PKEY_CTRL_DEFAULT_MD_NID), is supported */ | |
41 | return -2; | |
42 | } | |
43 | ||
44 | static int poly1305_pkey_public_cmp(const EVP_PKEY *a, const EVP_PKEY *b) | |
45 | { | |
46 | return ASN1_OCTET_STRING_cmp(EVP_PKEY_get0(a), EVP_PKEY_get0(b)); | |
47 | } | |
48 | ||
2621c847 MC |
49 | static int poly1305_set_priv_key(EVP_PKEY *pkey, const unsigned char *priv, |
50 | size_t len) | |
51 | { | |
52 | ASN1_OCTET_STRING *os; | |
53 | ||
54 | if (pkey->pkey.ptr != NULL || len != POLY1305_KEY_SIZE) | |
55 | return 0; | |
56 | ||
57 | os = ASN1_OCTET_STRING_new(); | |
58 | if (os == NULL) | |
59 | return 0; | |
60 | ||
61 | if (!ASN1_OCTET_STRING_set(os, priv, len)) { | |
62 | ASN1_OCTET_STRING_free(os); | |
63 | return 0; | |
64 | } | |
65 | ||
66 | pkey->pkey.ptr = os; | |
67 | return 1; | |
68 | } | |
69 | ||
0d124b0a MC |
70 | static int poly1305_get_priv_key(const EVP_PKEY *pkey, unsigned char *priv, |
71 | size_t *len) | |
72 | { | |
73 | ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; | |
74 | ||
75 | if (priv == NULL) { | |
76 | *len = POLY1305_KEY_SIZE; | |
77 | return 1; | |
78 | } | |
79 | ||
80 | if (os == NULL || *len < POLY1305_KEY_SIZE) | |
81 | return 0; | |
82 | ||
83 | memcpy(priv, ASN1_STRING_get0_data(os), ASN1_STRING_length(os)); | |
84 | *len = POLY1305_KEY_SIZE; | |
85 | ||
86 | return 1; | |
87 | } | |
88 | ||
52ad5b60 TS |
89 | const EVP_PKEY_ASN1_METHOD poly1305_asn1_meth = { |
90 | EVP_PKEY_POLY1305, | |
91 | EVP_PKEY_POLY1305, | |
92 | 0, | |
93 | ||
94 | "POLY1305", | |
95 | "OpenSSL POLY1305 method", | |
96 | ||
97 | 0, 0, poly1305_pkey_public_cmp, 0, | |
98 | ||
99 | 0, 0, 0, | |
100 | ||
101 | poly1305_size, | |
102 | 0, 0, | |
103 | 0, 0, 0, 0, 0, 0, 0, | |
104 | ||
105 | poly1305_key_free, | |
106 | poly1305_pkey_ctrl, | |
2621c847 MC |
107 | NULL, |
108 | NULL, | |
109 | ||
110 | NULL, | |
111 | NULL, | |
112 | NULL, | |
113 | ||
114 | NULL, | |
115 | NULL, | |
116 | NULL, | |
117 | ||
118 | poly1305_set_priv_key, | |
119 | NULL, | |
0d124b0a MC |
120 | poly1305_get_priv_key, |
121 | NULL, | |
52ad5b60 | 122 | }; |