summaryrefslogtreecommitdiff
path: root/libarchive/archive_hmac.c
blob: 2a9d04c8d8f1ff6b8f7c40947fda8b57d347dca7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
/*-
* Copyright (c) 2014 Michihiro NAKAJIMA
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "archive_platform.h"

#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "archive.h"
#include "archive_hmac_private.h"

/*
 * On systems that do not support any recognized crypto libraries,
 * the archive_hmac.c file is expected to define no usable symbols.
 *
 * But some compilers and linkers choke on empty object files, so
 * define a public symbol that will always exist.  This could
 * be removed someday if this file gains another always-present
 * symbol definition.
 */
int __libarchive_hmac_build_hack(void) {
	return 0;
}


#ifdef ARCHIVE_HMAC_USE_Apple_CommonCrypto

static int
__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
{
	CCHmacInit(ctx, kCCHmacAlgSHA1, key, key_len);
	return 0;
}

static void
__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
    size_t data_len)
{
	CCHmacUpdate(ctx, data, data_len);
}

static void
__hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
{
	CCHmacFinal(ctx, out);
	*out_len = 20;
}

static void
__hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
{
	memset(ctx, 0, sizeof(*ctx));
}

#elif defined(_WIN32) && !defined(__CYGWIN__) && defined(HAVE_BCRYPT_H)

#ifndef BCRYPT_HASH_REUSABLE_FLAG
# define BCRYPT_HASH_REUSABLE_FLAG 0x00000020
#endif

static int
__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
{
#ifdef __GNUC__
#pragma GCC diagnostic ignored "-Wcast-qual"
#endif
	BCRYPT_ALG_HANDLE hAlg;
	BCRYPT_HASH_HANDLE hHash;
	DWORD hash_len;
	PBYTE hash;
	ULONG result;
	NTSTATUS status;

	ctx->hAlg = NULL;
	status = BCryptOpenAlgorithmProvider(&hAlg, BCRYPT_SHA1_ALGORITHM,
		MS_PRIMITIVE_PROVIDER, BCRYPT_ALG_HANDLE_HMAC_FLAG);
	if (!BCRYPT_SUCCESS(status))
		return -1;
	status = BCryptGetProperty(hAlg, BCRYPT_HASH_LENGTH, (PUCHAR)&hash_len,
		sizeof(hash_len), &result, 0);
	if (!BCRYPT_SUCCESS(status)) {
		BCryptCloseAlgorithmProvider(hAlg, 0);
		return -1;
	}
	hash = (PBYTE)HeapAlloc(GetProcessHeap(), 0, hash_len);
	if (hash == NULL) {
		BCryptCloseAlgorithmProvider(hAlg, 0);
		return -1;
	}
	status = BCryptCreateHash(hAlg, &hHash, NULL, 0,
		(PUCHAR)key, (ULONG)key_len, BCRYPT_HASH_REUSABLE_FLAG);
	if (!BCRYPT_SUCCESS(status)) {
		BCryptCloseAlgorithmProvider(hAlg, 0);
		HeapFree(GetProcessHeap(), 0, hash);
		return -1;
	}

	ctx->hAlg = hAlg;
	ctx->hHash = hHash;
	ctx->hash_len = hash_len;
	ctx->hash = hash;

	return 0;
}

static void
__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
	size_t data_len)
{
	BCryptHashData(ctx->hHash, (PUCHAR)(uintptr_t)data, (ULONG)data_len, 0);
}

static void
__hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
{
	BCryptFinishHash(ctx->hHash, ctx->hash, ctx->hash_len, 0);
	if (ctx->hash_len == *out_len)
		memcpy(out, ctx->hash, *out_len);
}

static void
__hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
{
	if (ctx->hAlg != NULL) {
		BCryptCloseAlgorithmProvider(ctx->hAlg, 0);
		HeapFree(GetProcessHeap(), 0, ctx->hash);
		ctx->hAlg = NULL;
	}
}

#elif defined(HAVE_LIBMBEDCRYPTO) && defined(HAVE_MBEDTLS_MD_H)

static int
__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
{
        const mbedtls_md_info_t *info;
        int ret;

        mbedtls_md_init(ctx);
        info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA1);
        if (info == NULL) {
                mbedtls_md_free(ctx);
                return (-1);
        }
        ret = mbedtls_md_setup(ctx, info, 1);
        if (ret != 0) {
                mbedtls_md_free(ctx);
                return (-1);
        }
	ret = mbedtls_md_hmac_starts(ctx, key, key_len);
	if (ret != 0) {
		mbedtls_md_free(ctx);
		return (-1);
	}
	return 0;
}

static void
__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
    size_t data_len)
{
	mbedtls_md_hmac_update(ctx, data, data_len);
}

static void __hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
{
	(void)out_len;	/* UNUSED */

	mbedtls_md_hmac_finish(ctx, out);
}

static void __hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
{
	mbedtls_md_free(ctx);
	memset(ctx, 0, sizeof(*ctx));
}

#elif defined(HAVE_LIBNETTLE) && defined(HAVE_NETTLE_HMAC_H)

static int
__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
{
	hmac_sha1_set_key(ctx, key_len, key);
	return 0;
}

static void
__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
    size_t data_len)
{
	hmac_sha1_update(ctx, data_len, data);
}

static void
__hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
{
	hmac_sha1_digest(ctx, (unsigned)*out_len, out);
}

static void
__hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
{
	memset(ctx, 0, sizeof(*ctx));
}

#elif defined(HAVE_LIBCRYPTO)

static int
__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
{
	*ctx = HMAC_CTX_new();
	if (*ctx == NULL)
		return -1;
	HMAC_Init_ex(*ctx, key, key_len, EVP_sha1(), NULL);
	return 0;
}

static void
__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
    size_t data_len)
{
	HMAC_Update(*ctx, data, data_len);
}

static void
__hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
{
	unsigned int len = (unsigned int)*out_len;

	HMAC_Final(*ctx, out, &len);
	*out_len = len;
}

static void
__hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
{
	HMAC_CTX_free(*ctx);
	*ctx = NULL;
}

#else

/* Stub */
static int
__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
{
	(void)ctx;/* UNUSED */
	(void)key;/* UNUSED */
	(void)key_len;/* UNUSED */
	return -1;
}

static void
__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
    size_t data_len)
{
	(void)ctx;/* UNUSED */
	(void)data;/* UNUSED */
	(void)data_len;/* UNUSED */
}

static void
__hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
{
	(void)ctx;/* UNUSED */
	(void)out;/* UNUSED */
	(void)out_len;/* UNUSED */
}

static void
__hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
{
	(void)ctx;/* UNUSED */
}

#endif

const struct archive_hmac __archive_hmac = {
	&__hmac_sha1_init,
	&__hmac_sha1_update,
	&__hmac_sha1_final,
	&__hmac_sha1_cleanup,
};