wolfssl: Add wolfSSL plugin for cryptographic implementations
[strongswan.git] / src / libstrongswan / plugins / wolfssl / wolfssl_hasher.c
1 /*
2 * Copyright (C) 2019 Sean Parkinson, wolfSSL Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22
23 #include "wolfssl_common.h"
24 #include "wolfssl_hasher.h"
25 #include "wolfssl_util.h"
26
27 #include <wolfssl/wolfcrypt/hash.h>
28
29 typedef struct private_wolfssl_hasher_t private_wolfssl_hasher_t;
30
31 /**
32 * Private data of wolfssl_hasher_t
33 */
34 struct private_wolfssl_hasher_t {
35
36 /**
37 * Public part of this class.
38 */
39 wolfssl_hasher_t public;
40
41 /**
42 * the hasher to use
43 */
44 wc_HashAlg hasher;
45
46 /**
47 * the hash algiorithm
48 */
49 enum wc_HashType type;
50 };
51
52 METHOD(hasher_t, get_hash_size, size_t,
53 private_wolfssl_hasher_t *this)
54 {
55 return wc_HashGetDigestSize(this->type);
56 }
57
58 METHOD(hasher_t, reset, bool,
59 private_wolfssl_hasher_t *this)
60 {
61 return wc_HashInit(&this->hasher, this->type) == 0;
62 }
63
64 METHOD(hasher_t, get_hash, bool,
65 private_wolfssl_hasher_t *this, chunk_t chunk, uint8_t *hash)
66 {
67 int ret;
68
69 ret = wc_HashUpdate(&this->hasher, this->type, chunk.ptr, chunk.len);
70 if (ret == 0 && hash)
71 {
72 ret = wc_HashFinal(&this->hasher, this->type, hash);
73 if (ret == 0)
74 {
75 return reset(this);
76 }
77 }
78 return ret == 0;
79 }
80
81 METHOD(hasher_t, allocate_hash, bool,
82 private_wolfssl_hasher_t *this, chunk_t chunk, chunk_t *hash)
83 {
84 if (hash)
85 {
86 *hash = chunk_alloc(get_hash_size(this));
87 return get_hash(this, chunk, hash->ptr);
88 }
89 return get_hash(this, chunk, NULL);
90 }
91
92 METHOD(hasher_t, destroy, void,
93 private_wolfssl_hasher_t *this)
94 {
95 wc_HashFree(&this->hasher, this->type);
96 free(this);
97 }
98
99 /*
100 * Described in header
101 */
102 wolfssl_hasher_t *wolfssl_hasher_create(hash_algorithm_t algo)
103 {
104 private_wolfssl_hasher_t *this;
105 enum wc_HashType type;
106
107 if (!wolfssl_hash2type(algo, &type))
108 {
109 return NULL;
110 }
111
112 INIT(this,
113 .public = {
114 .hasher = {
115 .get_hash = _get_hash,
116 .allocate_hash = _allocate_hash,
117 .get_hash_size = _get_hash_size,
118 .reset = _reset,
119 .destroy = _destroy,
120 },
121 },
122 .type = type,
123 );
124
125 /* initialization */
126 if (!reset(this))
127 {
128 destroy(this);
129 return NULL;
130 }
131
132 return &this->public;
133 }