archive_hmac.c revision 315432 
1/*-
2* Copyright (c) 2014 Michihiro NAKAJIMA
3* All rights reserved.
4*
5* Redistribution and use in source and binary forms, with or without
6* modification, are permitted provided that the following conditions
7* are met:
8* 1. Redistributions of source code must retain the above copyright
9*    notice, this list of conditions and the following disclaimer.
10* 2. Redistributions in binary form must reproduce the above copyright
11*    notice, this list of conditions and the following disclaimer in the
12*    documentation and/or other materials provided with the distribution.
13*
14* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24*/
25
26#include "archive_platform.h"
27
28#ifdef HAVE_STRING_H
29#include <string.h>
30#endif
31#include "archive.h"
32#include "archive_hmac_private.h"
33
34/*
35 * On systems that do not support any recognized crypto libraries,
36 * the archive_hmac.c file is expected to define no usable symbols.
37 *
38 * But some compilers and linkers choke on empty object files, so
39 * define a public symbol that will always exist.  This could
40 * be removed someday if this file gains another always-present
41 * symbol definition.
42 */
43int __libarchive_hmac_build_hack(void) {
44	return 0;
45}
46
47
48#ifdef ARCHIVE_HMAC_USE_Apple_CommonCrypto
49
50static int
51__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
52{
53	CCHmacInit(ctx, kCCHmacAlgSHA1, key, key_len);
54	return 0;
55}
56
57static void
58__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
59    size_t data_len)
60{
61	CCHmacUpdate(ctx, data, data_len);
62}
63
64static void
65__hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
66{
67	CCHmacFinal(ctx, out);
68	*out_len = 20;
69}
70
71static void
72__hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
73{
74	memset(ctx, 0, sizeof(*ctx));
75}
76
77#elif defined(_WIN32) && !defined(__CYGWIN__) && defined(HAVE_BCRYPT_H)
78
79#ifndef BCRYPT_HASH_REUSABLE_FLAG
80# define BCRYPT_HASH_REUSABLE_FLAG 0x00000020
81#endif
82
83static int
84__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
85{
86	BCRYPT_ALG_HANDLE hAlg;
87	BCRYPT_HASH_HANDLE hHash;
88	DWORD hash_len;
89	PBYTE hash;
90	ULONG result;
91	NTSTATUS status;
92
93	ctx->hAlg = NULL;
94	status = BCryptOpenAlgorithmProvider(&hAlg, BCRYPT_SHA1_ALGORITHM,
95		MS_PRIMITIVE_PROVIDER, BCRYPT_ALG_HANDLE_HMAC_FLAG);
96	if (!BCRYPT_SUCCESS(status))
97		return -1;
98	status = BCryptGetProperty(hAlg, BCRYPT_HASH_LENGTH, (PUCHAR)&hash_len,
99		sizeof(hash_len), &result, 0);
100	if (!BCRYPT_SUCCESS(status)) {
101		BCryptCloseAlgorithmProvider(hAlg, 0);
102		return -1;
103	}
104	hash = (PBYTE)HeapAlloc(GetProcessHeap(), 0, hash_len);
105	if (hash == NULL) {
106		BCryptCloseAlgorithmProvider(hAlg, 0);
107		return -1;
108	}
109	status = BCryptCreateHash(hAlg, &hHash, NULL, 0,
110		(PUCHAR)key, (ULONG)key_len, BCRYPT_HASH_REUSABLE_FLAG);
111	if (!BCRYPT_SUCCESS(status)) {
112		BCryptCloseAlgorithmProvider(hAlg, 0);
113		HeapFree(GetProcessHeap(), 0, hash);
114		return -1;
115	}
116
117	ctx->hAlg = hAlg;
118	ctx->hHash = hHash;
119	ctx->hash_len = hash_len;
120	ctx->hash = hash;
121
122	return 0;
123}
124
125static void
126__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
127	size_t data_len)
128{
129	BCryptHashData(ctx->hHash, (PUCHAR)(uintptr_t)data, (ULONG)data_len, 0);
130}
131
132static void
133__hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
134{
135	BCryptFinishHash(ctx->hHash, ctx->hash, ctx->hash_len, 0);
136	if (ctx->hash_len == *out_len)
137		memcpy(out, ctx->hash, *out_len);
138}
139
140static void
141__hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
142{
143	if (ctx->hAlg != NULL) {
144		BCryptCloseAlgorithmProvider(ctx->hAlg, 0);
145		HeapFree(GetProcessHeap(), 0, ctx->hash);
146		ctx->hAlg = NULL;
147	}
148}
149
150#elif defined(HAVE_LIBNETTLE) && defined(HAVE_NETTLE_HMAC_H)
151
152static int
153__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
154{
155	hmac_sha1_set_key(ctx, key_len, key);
156	return 0;
157}
158
159static void
160__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
161    size_t data_len)
162{
163	hmac_sha1_update(ctx, data_len, data);
164}
165
166static void
167__hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
168{
169	hmac_sha1_digest(ctx, (unsigned)*out_len, out);
170}
171
172static void
173__hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
174{
175	memset(ctx, 0, sizeof(*ctx));
176}
177
178#elif defined(HAVE_LIBCRYPTO)
179
180static int
181__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
182{
183	*ctx = HMAC_CTX_new();
184	if (*ctx == NULL)
185		return -1;
186	HMAC_Init_ex(*ctx, key, key_len, EVP_sha1(), NULL);
187	return 0;
188}
189
190static void
191__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
192    size_t data_len)
193{
194	HMAC_Update(*ctx, data, data_len);
195}
196
197static void
198__hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
199{
200	unsigned int len = (unsigned int)*out_len;
201	HMAC_Final(*ctx, out, &len);
202	*out_len = len;
203}
204
205static void
206__hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
207{
208	HMAC_CTX_free(*ctx);
209	*ctx = NULL;
210}
211
212#else
213
214/* Stub */
215static int
216__hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
217{
218	(void)ctx;/* UNUSED */
219	(void)key;/* UNUSED */
220	(void)key_len;/* UNUSED */
221	return -1;
222}
223
224static void
225__hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
226    size_t data_len)
227{
228	(void)ctx;/* UNUSED */
229	(void)data;/* UNUSED */
230	(void)data_len;/* UNUSED */
231}
232
233static void
234__hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
235{
236	(void)ctx;/* UNUSED */
237	(void)out;/* UNUSED */
238	(void)out_len;/* UNUSED */
239}
240
241static void
242__hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
243{
244	(void)ctx;/* UNUSED */
245}
246
247#endif
248
249const struct archive_hmac __archive_hmac = {
250	&__hmac_sha1_init,
251	&__hmac_sha1_update,
252	&__hmac_sha1_final,
253	&__hmac_sha1_cleanup,
254};
255