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) 66 #include <bcrypt.h> 67 68 /* Common in other bcrypt implementations, but missing from VS2008. */ 69 #ifndef BCRYPT_SUCCESS 70 #define BCRYPT_SUCCESS(r) ((NTSTATUS)(r) == STATUS_SUCCESS) 71 #endif 72 73 #define AES_MAX_KEY_SIZE 32 74 #define AES_BLOCK_SIZE 16 75 typedef struct { 76 BCRYPT_ALG_HANDLE hAlg; 77 BCRYPT_KEY_HANDLE hKey; 78 PBYTE keyObj; 79 DWORD keyObj_len; 80 uint8_t nonce[AES_BLOCK_SIZE]; 81 uint8_t encr_buf[AES_BLOCK_SIZE]; 82 unsigned encr_pos; 83 } archive_crypto_ctx; 84 85 #elif defined(HAVE_LIBMBEDCRYPTO) && defined(HAVE_MBEDTLS_AES_H) 86 #include <mbedtls/aes.h> 87 #include <mbedtls/md.h> 88 #include <mbedtls/pkcs5.h> 89 90 #define AES_MAX_KEY_SIZE 32 91 #define AES_BLOCK_SIZE 16 92 93 typedef struct { 94 mbedtls_aes_context ctx; 95 uint8_t key[AES_MAX_KEY_SIZE]; 96 unsigned key_len; 97 uint8_t nonce[AES_BLOCK_SIZE]; 98 uint8_t encr_buf[AES_BLOCK_SIZE]; 99 unsigned encr_pos; 100 } archive_crypto_ctx; 101 102 #elif defined(HAVE_LIBNETTLE) && defined(HAVE_NETTLE_AES_H) 103 #if defined(HAVE_NETTLE_PBKDF2_H) 104 #include <nettle/pbkdf2.h> 105 #endif 106 #include <nettle/aes.h> 107 #include <nettle/version.h> 108 109 typedef struct { 110 #if NETTLE_VERSION_MAJOR < 3 111 struct aes_ctx ctx; 112 #else 113 union { 114 struct aes128_ctx c128; 115 struct aes192_ctx c192; 116 struct aes256_ctx c256; 117 } ctx; 118 #endif 119 uint8_t key[AES_MAX_KEY_SIZE]; 120 unsigned key_len; 121 uint8_t nonce[AES_BLOCK_SIZE]; 122 uint8_t encr_buf[AES_BLOCK_SIZE]; 123 unsigned encr_pos; 124 } archive_crypto_ctx; 125 126 #elif defined(HAVE_LIBCRYPTO) 127 #include "archive_openssl_evp_private.h" 128 #define AES_BLOCK_SIZE 16 129 #define AES_MAX_KEY_SIZE 32 130 131 typedef struct { 132 EVP_CIPHER_CTX *ctx; 133 const EVP_CIPHER *type; 134 uint8_t key[AES_MAX_KEY_SIZE]; 135 unsigned key_len; 136 uint8_t nonce[AES_BLOCK_SIZE]; 137 uint8_t encr_buf[AES_BLOCK_SIZE]; 138 unsigned encr_pos; 139 } archive_crypto_ctx; 140 141 #else 142 143 #define AES_BLOCK_SIZE 16 144 #define AES_MAX_KEY_SIZE 32 145 typedef int archive_crypto_ctx; 146 147 #endif 148 149 /* defines */ 150 #define archive_pbkdf2_sha1(pw, pw_len, salt, salt_len, rounds, dk, dk_len)\ 151 __archive_cryptor.pbkdf2sha1(pw, pw_len, salt, salt_len, rounds, dk, dk_len) 152 153 #define archive_decrypto_aes_ctr_init(ctx, key, key_len) \ 154 __archive_cryptor.decrypto_aes_ctr_init(ctx, key, key_len) 155 #define archive_decrypto_aes_ctr_update(ctx, in, in_len, out, out_len) \ 156 __archive_cryptor.decrypto_aes_ctr_update(ctx, in, in_len, out, out_len) 157 #define archive_decrypto_aes_ctr_release(ctx) \ 158 __archive_cryptor.decrypto_aes_ctr_release(ctx) 159 160 #define archive_encrypto_aes_ctr_init(ctx, key, key_len) \ 161 __archive_cryptor.encrypto_aes_ctr_init(ctx, key, key_len) 162 #define archive_encrypto_aes_ctr_update(ctx, in, in_len, out, out_len) \ 163 __archive_cryptor.encrypto_aes_ctr_update(ctx, in, in_len, out, out_len) 164 #define archive_encrypto_aes_ctr_release(ctx) \ 165 __archive_cryptor.encrypto_aes_ctr_release(ctx) 166 167 /* Minimal interface to cryptographic functionality for internal use in 168 * libarchive */ 169 struct archive_cryptor 170 { 171 /* PKCS5 PBKDF2 HMAC-SHA1 */ 172 int (*pbkdf2sha1)(const char *pw, size_t pw_len, const uint8_t *salt, 173 size_t salt_len, unsigned rounds, uint8_t *derived_key, 174 size_t derived_key_len); 175 /* AES CTR mode(little endian version) */ 176 int (*decrypto_aes_ctr_init)(archive_crypto_ctx *, const uint8_t *, size_t); 177 int (*decrypto_aes_ctr_update)(archive_crypto_ctx *, const uint8_t *, 178 size_t, uint8_t *, size_t *); 179 int (*decrypto_aes_ctr_release)(archive_crypto_ctx *); 180 int (*encrypto_aes_ctr_init)(archive_crypto_ctx *, const uint8_t *, size_t); 181 int (*encrypto_aes_ctr_update)(archive_crypto_ctx *, const uint8_t *, 182 size_t, uint8_t *, size_t *); 183 int (*encrypto_aes_ctr_release)(archive_crypto_ctx *); 184 }; 185 186 extern const struct archive_cryptor __archive_cryptor; 187 188 #endif 189