/src/openssl111/crypto/poly1305/poly1305_ameth.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Copyright 2007-2021 The OpenSSL Project Authors. All Rights Reserved. |
3 | | * |
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 |
8 | | */ |
9 | | |
10 | | #include <stdio.h> |
11 | | #include "internal/cryptlib.h" |
12 | | #include <openssl/evp.h> |
13 | | #include "crypto/asn1.h" |
14 | | #include "crypto/poly1305.h" |
15 | | #include "poly1305_local.h" |
16 | | #include "crypto/evp.h" |
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 | 0 | { |
25 | 0 | return POLY1305_DIGEST_SIZE; |
26 | 0 | } |
27 | | |
28 | | static void poly1305_key_free(EVP_PKEY *pkey) |
29 | 0 | { |
30 | 0 | ASN1_OCTET_STRING *os = EVP_PKEY_get0(pkey); |
31 | 0 | if (os != NULL) { |
32 | 0 | if (os->data != NULL) |
33 | 0 | OPENSSL_cleanse(os->data, os->length); |
34 | 0 | ASN1_OCTET_STRING_free(os); |
35 | 0 | } |
36 | 0 | } |
37 | | |
38 | | static int poly1305_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2) |
39 | 0 | { |
40 | | /* nothing, (including ASN1_PKEY_CTRL_DEFAULT_MD_NID), is supported */ |
41 | 0 | return -2; |
42 | 0 | } |
43 | | |
44 | | static int poly1305_pkey_public_cmp(const EVP_PKEY *a, const EVP_PKEY *b) |
45 | 0 | { |
46 | 0 | return ASN1_OCTET_STRING_cmp(EVP_PKEY_get0(a), EVP_PKEY_get0(b)) == 0; |
47 | 0 | } |
48 | | |
49 | | static int poly1305_set_priv_key(EVP_PKEY *pkey, const unsigned char *priv, |
50 | | size_t len) |
51 | 0 | { |
52 | 0 | ASN1_OCTET_STRING *os; |
53 | |
|
54 | 0 | if (pkey->pkey.ptr != NULL || len != POLY1305_KEY_SIZE) |
55 | 0 | return 0; |
56 | | |
57 | 0 | os = ASN1_OCTET_STRING_new(); |
58 | 0 | if (os == NULL) |
59 | 0 | return 0; |
60 | | |
61 | 0 | if (!ASN1_OCTET_STRING_set(os, priv, len)) { |
62 | 0 | ASN1_OCTET_STRING_free(os); |
63 | 0 | return 0; |
64 | 0 | } |
65 | | |
66 | 0 | pkey->pkey.ptr = os; |
67 | 0 | return 1; |
68 | 0 | } |
69 | | |
70 | | static int poly1305_get_priv_key(const EVP_PKEY *pkey, unsigned char *priv, |
71 | | size_t *len) |
72 | 0 | { |
73 | 0 | ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr; |
74 | |
|
75 | 0 | if (priv == NULL) { |
76 | 0 | *len = POLY1305_KEY_SIZE; |
77 | 0 | return 1; |
78 | 0 | } |
79 | | |
80 | 0 | if (os == NULL || *len < POLY1305_KEY_SIZE) |
81 | 0 | return 0; |
82 | | |
83 | 0 | memcpy(priv, ASN1_STRING_get0_data(os), ASN1_STRING_length(os)); |
84 | 0 | *len = POLY1305_KEY_SIZE; |
85 | |
|
86 | 0 | return 1; |
87 | 0 | } |
88 | | |
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, |
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, |
120 | | poly1305_get_priv_key, |
121 | | NULL, |
122 | | }; |