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 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 } 124 125 static 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 } 131 132 static 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 } 139 140 static 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) 151 152 static 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 } 158 159 static 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 } 165 166 static 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 } 171 172 static void 173 __hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx) 174 { 175 memset(ctx, 0, sizeof(*ctx)); 176 } 177 178 #elif defined(HAVE_LIBCRYPTO) 179 180 static 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 } 189 190 static 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 } 196 197 static 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 } 204 205 static 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 */ 215 static 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 } 223 224 static 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 } 232 233 static 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 } 240 241 static void 242 __hmac_sha1_cleanup(archive_hmac_sha1_ctx *ctx) 243 { 244 (void)ctx;/* UNUSED */ 245 } 246 247 #endif 248 249 const struct archive_hmac __archive_hmac = { 250 &__hmac_sha1_init, 251 &__hmac_sha1_update, 252 &__hmac_sha1_final, 253 &__hmac_sha1_cleanup, 254 }; 255