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  */
43 int __libarchive_hmac_build_hack(void) {
44 	return 0;
45 }
46 
47 
48 #ifdef ARCHIVE_HMAC_USE_Apple_CommonCrypto
49 
50 static 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 
57 static 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 
64 static 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 
71 static 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 
83 static int
84 __hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
85 {
86 #ifdef __GNUC__
87 #pragma GCC diagnostic ignored "-Wcast-qual"
88 #endif
89 	BCRYPT_ALG_HANDLE hAlg;
90 	BCRYPT_HASH_HANDLE hHash;
91 	DWORD hash_len;
92 	PBYTE hash;
93 	ULONG result;
94 	NTSTATUS status;
95 
96 	ctx->hAlg = NULL;
97 	status = BCryptOpenAlgorithmProvider(&hAlg, BCRYPT_SHA1_ALGORITHM,
98 		MS_PRIMITIVE_PROVIDER, BCRYPT_ALG_HANDLE_HMAC_FLAG);
99 	if (!BCRYPT_SUCCESS(status))
100 		return -1;
101 	status = BCryptGetProperty(hAlg, BCRYPT_HASH_LENGTH, (PUCHAR)&hash_len,
102 		sizeof(hash_len), &result, 0);
103 	if (!BCRYPT_SUCCESS(status)) {
104 		BCryptCloseAlgorithmProvider(hAlg, 0);
105 		return -1;
106 	}
107 	hash = (PBYTE)HeapAlloc(GetProcessHeap(), 0, hash_len);
108 	if (hash == NULL) {
109 		BCryptCloseAlgorithmProvider(hAlg, 0);
110 		return -1;
111 	}
112 	status = BCryptCreateHash(hAlg, &hHash, NULL, 0,
113 		(PUCHAR)key, (ULONG)key_len, BCRYPT_HASH_REUSABLE_FLAG);
114 	if (!BCRYPT_SUCCESS(status)) {
115 		BCryptCloseAlgorithmProvider(hAlg, 0);
116 		HeapFree(GetProcessHeap(), 0, hash);
117 		return -1;
118 	}
119 
120 	ctx->hAlg = hAlg;
121 	ctx->hHash = hHash;
122 	ctx->hash_len = hash_len;
123 	ctx->hash = hash;
124 
125 	return 0;
126 }
127 
128 static void
129 __hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
130 	size_t data_len)
131 {
132 	BCryptHashData(ctx->hHash, (PUCHAR)(uintptr_t)data, (ULONG)data_len, 0);
133 }
134 
135 static void
136 __hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
137 {
138 	BCryptFinishHash(ctx->hHash, ctx->hash, ctx->hash_len, 0);
139 	if (ctx->hash_len == *out_len)
140 		memcpy(out, ctx->hash, *out_len);
141 }
142 
143 static void
144 __hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
145 {
146 	if (ctx->hAlg != NULL) {
147 		BCryptCloseAlgorithmProvider(ctx->hAlg, 0);
148 		HeapFree(GetProcessHeap(), 0, ctx->hash);
149 		ctx->hAlg = NULL;
150 	}
151 }
152 
153 #elif defined(HAVE_LIBMBEDCRYPTO) && defined(HAVE_MBEDTLS_MD_H)
154 
155 static int
156 __hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
157 {
158         const mbedtls_md_info_t *info;
159         int ret;
160 
161         mbedtls_md_init(ctx);
162         info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA1);
163         if (info == NULL) {
164                 mbedtls_md_free(ctx);
165                 return (-1);
166         }
167         ret = mbedtls_md_setup(ctx, info, 1);
168         if (ret != 0) {
169                 mbedtls_md_free(ctx);
170                 return (-1);
171         }
172 	ret = mbedtls_md_hmac_starts(ctx, key, key_len);
173 	if (ret != 0) {
174 		mbedtls_md_free(ctx);
175 		return (-1);
176 	}
177 	return 0;
178 }
179 
180 static void
181 __hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
182     size_t data_len)
183 {
184 	mbedtls_md_hmac_update(ctx, data, data_len);
185 }
186 
187 static void __hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
188 {
189 	(void)out_len;	/* UNUSED */
190 
191 	mbedtls_md_hmac_finish(ctx, out);
192 }
193 
194 static void __hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
195 {
196 	mbedtls_md_free(ctx);
197 	memset(ctx, 0, sizeof(*ctx));
198 }
199 
200 #elif defined(HAVE_LIBNETTLE) && defined(HAVE_NETTLE_HMAC_H)
201 
202 static int
203 __hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
204 {
205 	hmac_sha1_set_key(ctx, key_len, key);
206 	return 0;
207 }
208 
209 static void
210 __hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
211     size_t data_len)
212 {
213 	hmac_sha1_update(ctx, data_len, data);
214 }
215 
216 static void
217 __hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
218 {
219 	hmac_sha1_digest(ctx, (unsigned)*out_len, out);
220 }
221 
222 static void
223 __hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
224 {
225 	memset(ctx, 0, sizeof(*ctx));
226 }
227 
228 #elif defined(HAVE_LIBCRYPTO)
229 
230 static int
231 __hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
232 {
233 	*ctx = HMAC_CTX_new();
234 	if (*ctx == NULL)
235 		return -1;
236 	HMAC_Init_ex(*ctx, key, key_len, EVP_sha1(), NULL);
237 	return 0;
238 }
239 
240 static void
241 __hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
242     size_t data_len)
243 {
244 	HMAC_Update(*ctx, data, data_len);
245 }
246 
247 static void
248 __hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
249 {
250 	unsigned int len = (unsigned int)*out_len;
251 
252 	HMAC_Final(*ctx, out, &len);
253 	*out_len = len;
254 }
255 
256 static void
257 __hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
258 {
259 	HMAC_CTX_free(*ctx);
260 	*ctx = NULL;
261 }
262 
263 #else
264 
265 /* Stub */
266 static int
267 __hmac_sha1_init(archive_hmac_sha1_ctx *ctx, const uint8_t *key, size_t key_len)
268 {
269 	(void)ctx;/* UNUSED */
270 	(void)key;/* UNUSED */
271 	(void)key_len;/* UNUSED */
272 	return -1;
273 }
274 
275 static void
276 __hmac_sha1_update(archive_hmac_sha1_ctx *ctx, const uint8_t *data,
277     size_t data_len)
278 {
279 	(void)ctx;/* UNUSED */
280 	(void)data;/* UNUSED */
281 	(void)data_len;/* UNUSED */
282 }
283 
284 static void
285 __hmac_sha1_final(archive_hmac_sha1_ctx *ctx, uint8_t *out, size_t *out_len)
286 {
287 	(void)ctx;/* UNUSED */
288 	(void)out;/* UNUSED */
289 	(void)out_len;/* UNUSED */
290 }
291 
292 static void
293 __hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx)
294 {
295 	(void)ctx;/* UNUSED */
296 }
297 
298 #endif
299 
300 const struct archive_hmac __archive_hmac = {
301 	&__hmac_sha1_init,
302 	&__hmac_sha1_update,
303 	&__hmac_sha1_final,
304 	&__hmac_sha1_cleanup,
305 };
306