archive_cryptor_private.h revision 358088
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 */ 41int __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 56typedef 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 75typedef 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 93typedef 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 108typedef struct { 109 struct aes_ctx ctx; 110 uint8_t key[AES_MAX_KEY_SIZE]; 111 unsigned key_len; 112 uint8_t nonce[AES_BLOCK_SIZE]; 113 uint8_t encr_buf[AES_BLOCK_SIZE]; 114 unsigned encr_pos; 115} archive_crypto_ctx; 116 117#elif defined(HAVE_LIBCRYPTO) 118#include "archive_openssl_evp_private.h" 119#define AES_BLOCK_SIZE 16 120#define AES_MAX_KEY_SIZE 32 121 122typedef struct { 123 EVP_CIPHER_CTX *ctx; 124 const EVP_CIPHER *type; 125 uint8_t key[AES_MAX_KEY_SIZE]; 126 unsigned key_len; 127 uint8_t nonce[AES_BLOCK_SIZE]; 128 uint8_t encr_buf[AES_BLOCK_SIZE]; 129 unsigned encr_pos; 130} archive_crypto_ctx; 131 132#else 133 134#define AES_BLOCK_SIZE 16 135#define AES_MAX_KEY_SIZE 32 136typedef int archive_crypto_ctx; 137 138#endif 139 140/* defines */ 141#define archive_pbkdf2_sha1(pw, pw_len, salt, salt_len, rounds, dk, dk_len)\ 142 __archive_cryptor.pbkdf2sha1(pw, pw_len, salt, salt_len, rounds, dk, dk_len) 143 144#define archive_decrypto_aes_ctr_init(ctx, key, key_len) \ 145 __archive_cryptor.decrypto_aes_ctr_init(ctx, key, key_len) 146#define archive_decrypto_aes_ctr_update(ctx, in, in_len, out, out_len) \ 147 __archive_cryptor.decrypto_aes_ctr_update(ctx, in, in_len, out, out_len) 148#define archive_decrypto_aes_ctr_release(ctx) \ 149 __archive_cryptor.decrypto_aes_ctr_release(ctx) 150 151#define archive_encrypto_aes_ctr_init(ctx, key, key_len) \ 152 __archive_cryptor.encrypto_aes_ctr_init(ctx, key, key_len) 153#define archive_encrypto_aes_ctr_update(ctx, in, in_len, out, out_len) \ 154 __archive_cryptor.encrypto_aes_ctr_update(ctx, in, in_len, out, out_len) 155#define archive_encrypto_aes_ctr_release(ctx) \ 156 __archive_cryptor.encrypto_aes_ctr_release(ctx) 157 158/* Minimal interface to cryptographic functionality for internal use in 159 * libarchive */ 160struct archive_cryptor 161{ 162 /* PKCS5 PBKDF2 HMAC-SHA1 */ 163 int (*pbkdf2sha1)(const char *pw, size_t pw_len, const uint8_t *salt, 164 size_t salt_len, unsigned rounds, uint8_t *derived_key, 165 size_t derived_key_len); 166 /* AES CTR mode(little endian version) */ 167 int (*decrypto_aes_ctr_init)(archive_crypto_ctx *, const uint8_t *, size_t); 168 int (*decrypto_aes_ctr_update)(archive_crypto_ctx *, const uint8_t *, 169 size_t, uint8_t *, size_t *); 170 int (*decrypto_aes_ctr_release)(archive_crypto_ctx *); 171 int (*encrypto_aes_ctr_init)(archive_crypto_ctx *, const uint8_t *, size_t); 172 int (*encrypto_aes_ctr_update)(archive_crypto_ctx *, const uint8_t *, 173 size_t, uint8_t *, size_t *); 174 int (*encrypto_aes_ctr_release)(archive_crypto_ctx *); 175}; 176 177extern const struct archive_cryptor __archive_cryptor; 178 179#endif 180