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 #ifndef ARCHIVE_CRYPTOR_PRIVATE_H_INCLUDED 27 #define ARCHIVE_CRYPTOR_PRIVATE_H_INCLUDED 28 29 #ifndef __LIBARCHIVE_BUILD 30 #error This header is only to be used internally to libarchive. 31 #endif 32 /* 33 * On systems that do not support any recognized crypto libraries, 34 * the archive_cryptor.c file will normally define no usable symbols. 35 * 36 * But some compilers and linkers choke on empty object files, so 37 * define a public symbol that will always exist. This could 38 * be removed someday if this file gains another always-present 39 * symbol definition. 40 */ 41 int __libarchive_cryptor_build_hack(void); 42 43 #ifdef __APPLE__ 44 # include <AvailabilityMacros.h> 45 # if MAC_OS_X_VERSION_MAX_ALLOWED >= 1080 46 # define ARCHIVE_CRYPTOR_USE_Apple_CommonCrypto 47 # endif 48 #endif 49 50 #ifdef ARCHIVE_CRYPTOR_USE_Apple_CommonCrypto 51 #include <CommonCrypto/CommonCryptor.h> 52 #include <CommonCrypto/CommonKeyDerivation.h> 53 #define AES_BLOCK_SIZE 16 54 #define AES_MAX_KEY_SIZE kCCKeySizeAES256 55 56 typedef struct { 57 CCCryptorRef ctx; 58 uint8_t key[AES_MAX_KEY_SIZE]; 59 unsigned key_len; 60 uint8_t nonce[AES_BLOCK_SIZE]; 61 uint8_t encr_buf[AES_BLOCK_SIZE]; 62 unsigned encr_pos; 63 } archive_crypto_ctx; 64 65 #elif defined(_WIN32) && !defined(__CYGWIN__) && defined(HAVE_BCRYPT_H) && _WIN32_WINNT >= _WIN32_WINNT_VISTA 66 #include <bcrypt.h> 67 #define ARCHIVE_CRYPTOR_USE_CNG 1 68 69 /* Common in other bcrypt implementations, but missing from VS2008. */ 70 #ifndef BCRYPT_SUCCESS 71 #define BCRYPT_SUCCESS(r) ((NTSTATUS)(r) == STATUS_SUCCESS) 72 #endif 73 74 #define AES_MAX_KEY_SIZE 32 75 #define AES_BLOCK_SIZE 16 76 typedef struct { 77 BCRYPT_ALG_HANDLE hAlg; 78 BCRYPT_KEY_HANDLE hKey; 79 PBYTE keyObj; 80 DWORD keyObj_len; 81 uint8_t nonce[AES_BLOCK_SIZE]; 82 uint8_t encr_buf[AES_BLOCK_SIZE]; 83 unsigned encr_pos; 84 } archive_crypto_ctx; 85 86 #elif defined(HAVE_LIBMBEDCRYPTO) && defined(HAVE_MBEDTLS_AES_H) 87 #include <mbedtls/aes.h> 88 #include <mbedtls/md.h> 89 #include <mbedtls/pkcs5.h> 90 #define ARCHIVE_CRYPTOR_USE_MBED 1 91 92 #define AES_MAX_KEY_SIZE 32 93 #define AES_BLOCK_SIZE 16 94 95 typedef struct { 96 mbedtls_aes_context ctx; 97 uint8_t key[AES_MAX_KEY_SIZE]; 98 unsigned key_len; 99 uint8_t nonce[AES_BLOCK_SIZE]; 100 uint8_t encr_buf[AES_BLOCK_SIZE]; 101 unsigned encr_pos; 102 } archive_crypto_ctx; 103 104 #elif defined(HAVE_LIBNETTLE) && defined(HAVE_NETTLE_AES_H) 105 #if defined(HAVE_NETTLE_PBKDF2_H) 106 #include <nettle/pbkdf2.h> 107 #endif 108 #include <nettle/aes.h> 109 #include <nettle/version.h> 110 #define ARCHIVE_CRYPTOR_USE_NETTLE 1 111 112 typedef struct { 113 #if NETTLE_VERSION_MAJOR < 3 114 struct aes_ctx ctx; 115 #else 116 union { 117 struct aes128_ctx c128; 118 struct aes192_ctx c192; 119 struct aes256_ctx c256; 120 } ctx; 121 #endif 122 uint8_t key[AES_MAX_KEY_SIZE]; 123 unsigned key_len; 124 uint8_t nonce[AES_BLOCK_SIZE]; 125 uint8_t encr_buf[AES_BLOCK_SIZE]; 126 unsigned encr_pos; 127 } archive_crypto_ctx; 128 129 #elif defined(HAVE_LIBCRYPTO) 130 #include "archive_openssl_evp_private.h" 131 #define ARCHIVE_CRYPTOR_USE_OPENSSL 1 132 #define AES_BLOCK_SIZE 16 133 #define AES_MAX_KEY_SIZE 32 134 135 typedef struct { 136 EVP_CIPHER_CTX *ctx; 137 const EVP_CIPHER *type; 138 uint8_t key[AES_MAX_KEY_SIZE]; 139 unsigned key_len; 140 uint8_t nonce[AES_BLOCK_SIZE]; 141 uint8_t encr_buf[AES_BLOCK_SIZE]; 142 unsigned encr_pos; 143 } archive_crypto_ctx; 144 145 #else 146 147 #if defined(_WIN32) && !defined(__CYGWIN__) && !(defined(HAVE_BCRYPT_H) && _WIN32_WINNT >= _WIN32_WINNT_VISTA) 148 #define ARCHIVE_CRYPTOR_USE_WINCRYPT 1 149 #endif 150 151 #define AES_BLOCK_SIZE 16 152 #define AES_MAX_KEY_SIZE 32 153 typedef int archive_crypto_ctx; 154 155 #endif 156 157 /* defines */ 158 #define archive_pbkdf2_sha1(pw, pw_len, salt, salt_len, rounds, dk, dk_len)\ 159 __archive_cryptor.pbkdf2sha1(pw, pw_len, salt, salt_len, rounds, dk, dk_len) 160 161 #define archive_decrypto_aes_ctr_init(ctx, key, key_len) \ 162 __archive_cryptor.decrypto_aes_ctr_init(ctx, key, key_len) 163 #define archive_decrypto_aes_ctr_update(ctx, in, in_len, out, out_len) \ 164 __archive_cryptor.decrypto_aes_ctr_update(ctx, in, in_len, out, out_len) 165 #define archive_decrypto_aes_ctr_release(ctx) \ 166 __archive_cryptor.decrypto_aes_ctr_release(ctx) 167 168 #define archive_encrypto_aes_ctr_init(ctx, key, key_len) \ 169 __archive_cryptor.encrypto_aes_ctr_init(ctx, key, key_len) 170 #define archive_encrypto_aes_ctr_update(ctx, in, in_len, out, out_len) \ 171 __archive_cryptor.encrypto_aes_ctr_update(ctx, in, in_len, out, out_len) 172 #define archive_encrypto_aes_ctr_release(ctx) \ 173 __archive_cryptor.encrypto_aes_ctr_release(ctx) 174 175 /* Minimal interface to cryptographic functionality for internal use in 176 * libarchive */ 177 struct archive_cryptor 178 { 179 /* PKCS5 PBKDF2 HMAC-SHA1 */ 180 int (*pbkdf2sha1)(const char *pw, size_t pw_len, const uint8_t *salt, 181 size_t salt_len, unsigned rounds, uint8_t *derived_key, 182 size_t derived_key_len); 183 /* AES CTR mode(little endian version) */ 184 int (*decrypto_aes_ctr_init)(archive_crypto_ctx *, const uint8_t *, size_t); 185 int (*decrypto_aes_ctr_update)(archive_crypto_ctx *, const uint8_t *, 186 size_t, uint8_t *, size_t *); 187 int (*decrypto_aes_ctr_release)(archive_crypto_ctx *); 188 int (*encrypto_aes_ctr_init)(archive_crypto_ctx *, const uint8_t *, size_t); 189 int (*encrypto_aes_ctr_update)(archive_crypto_ctx *, const uint8_t *, 190 size_t, uint8_t *, size_t *); 191 int (*encrypto_aes_ctr_release)(archive_crypto_ctx *); 192 }; 193 194 extern const struct archive_cryptor __archive_cryptor; 195 196 #endif 197