Annotation of embedaddon/strongswan/src/libstrongswan/plugins/wolfssl/wolfssl_hasher.c, revision 1.1.1.1
1.1 misho 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 interface
38: */
39: wolfssl_hasher_t public;
40:
41: /**
42: * The hasher to use
43: */
44: wc_HashAlg hasher;
45:
46: /**
47: * The hash algorithm
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: return &this->public;
132: }
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