164 lines
5.5 KiB
C
164 lines
5.5 KiB
C
/*-
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* Copyright (c) 2014 Michihiro NAKAJIMA
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __LIBARCHIVE_BUILD
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#error This header is only to be used internally to libarchive.
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#endif
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#ifndef ARCHIVE_CRYPTOR_PRIVATE_H_INCLUDED
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#define ARCHIVE_CRYPTOR_PRIVATE_H_INCLUDED
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/*
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* On systems that do not support any recognized crypto libraries,
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* the archive_cryptor.c file will normally define no usable symbols.
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*
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* But some compilers and linkers choke on empty object files, so
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* define a public symbol that will always exist. This could
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* be removed someday if this file gains another always-present
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* symbol definition.
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*/
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int __libarchive_cryptor_build_hack(void);
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#ifdef __APPLE__
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# include <AvailabilityMacros.h>
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# if MAC_OS_X_VERSION_MAX_ALLOWED >= 1080
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# define ARCHIVE_CRYPTOR_USE_Apple_CommonCrypto
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# endif
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#endif
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#ifdef ARCHIVE_CRYPTOR_USE_Apple_CommonCrypto
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#include <CommonCrypto/CommonCryptor.h>
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#include <CommonCrypto/CommonKeyDerivation.h>
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#define AES_BLOCK_SIZE 16
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#define AES_MAX_KEY_SIZE kCCKeySizeAES256
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typedef struct {
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CCCryptorRef ctx;
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uint8_t key[AES_MAX_KEY_SIZE];
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unsigned key_len;
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uint8_t nonce[AES_BLOCK_SIZE];
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uint8_t encr_buf[AES_BLOCK_SIZE];
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unsigned encr_pos;
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} archive_crypto_ctx;
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#elif defined(_WIN32) && !defined(__CYGWIN__) && defined(HAVE_BCRYPT_H)
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#include <Bcrypt.h>
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/* Common in other bcrypt implementations, but missing from VS2008. */
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#ifndef BCRYPT_SUCCESS
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#define BCRYPT_SUCCESS(r) ((NTSTATUS)(r) == STATUS_SUCCESS)
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#endif
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#define AES_MAX_KEY_SIZE 32
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#define AES_BLOCK_SIZE 16
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typedef struct {
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BCRYPT_ALG_HANDLE hAlg;
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BCRYPT_KEY_HANDLE hKey;
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PBYTE keyObj;
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DWORD keyObj_len;
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uint8_t nonce[AES_BLOCK_SIZE];
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uint8_t encr_buf[AES_BLOCK_SIZE];
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unsigned encr_pos;
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} archive_crypto_ctx;
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#elif defined(HAVE_LIBNETTLE) && defined(HAVE_NETTLE_AES_H)
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#if defined(HAVE_NETTLE_PBKDF2_H)
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#include <nettle/pbkdf2.h>
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#endif
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#include <nettle/aes.h>
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typedef struct {
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struct aes_ctx ctx;
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uint8_t key[AES_MAX_KEY_SIZE];
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unsigned key_len;
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uint8_t nonce[AES_BLOCK_SIZE];
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uint8_t encr_buf[AES_BLOCK_SIZE];
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unsigned encr_pos;
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} archive_crypto_ctx;
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#elif defined(HAVE_LIBCRYPTO)
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#include "archive_openssl_evp_private.h"
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#define AES_BLOCK_SIZE 16
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#define AES_MAX_KEY_SIZE 32
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typedef struct {
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EVP_CIPHER_CTX *ctx;
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const EVP_CIPHER *type;
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uint8_t key[AES_MAX_KEY_SIZE];
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unsigned key_len;
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uint8_t nonce[AES_BLOCK_SIZE];
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uint8_t encr_buf[AES_BLOCK_SIZE];
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unsigned encr_pos;
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} archive_crypto_ctx;
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#else
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#define AES_BLOCK_SIZE 16
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#define AES_MAX_KEY_SIZE 32
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typedef int archive_crypto_ctx;
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#endif
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/* defines */
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#define archive_pbkdf2_sha1(pw, pw_len, salt, salt_len, rounds, dk, dk_len)\
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__archive_cryptor.pbkdf2sha1(pw, pw_len, salt, salt_len, rounds, dk, dk_len)
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#define archive_decrypto_aes_ctr_init(ctx, key, key_len) \
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__archive_cryptor.decrypto_aes_ctr_init(ctx, key, key_len)
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#define archive_decrypto_aes_ctr_update(ctx, in, in_len, out, out_len) \
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__archive_cryptor.decrypto_aes_ctr_update(ctx, in, in_len, out, out_len)
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#define archive_decrypto_aes_ctr_release(ctx) \
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__archive_cryptor.decrypto_aes_ctr_release(ctx)
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#define archive_encrypto_aes_ctr_init(ctx, key, key_len) \
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__archive_cryptor.encrypto_aes_ctr_init(ctx, key, key_len)
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#define archive_encrypto_aes_ctr_update(ctx, in, in_len, out, out_len) \
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__archive_cryptor.encrypto_aes_ctr_update(ctx, in, in_len, out, out_len)
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#define archive_encrypto_aes_ctr_release(ctx) \
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__archive_cryptor.encrypto_aes_ctr_release(ctx)
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/* Minimal interface to cryptographic functionality for internal use in
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* libarchive */
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struct archive_cryptor
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{
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/* PKCS5 PBKDF2 HMAC-SHA1 */
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int (*pbkdf2sha1)(const char *pw, size_t pw_len, const uint8_t *salt,
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size_t salt_len, unsigned rounds, uint8_t *derived_key,
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size_t derived_key_len);
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/* AES CTR mode(little endian version) */
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int (*decrypto_aes_ctr_init)(archive_crypto_ctx *, const uint8_t *, size_t);
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int (*decrypto_aes_ctr_update)(archive_crypto_ctx *, const uint8_t *,
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size_t, uint8_t *, size_t *);
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int (*decrypto_aes_ctr_release)(archive_crypto_ctx *);
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int (*encrypto_aes_ctr_init)(archive_crypto_ctx *, const uint8_t *, size_t);
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int (*encrypto_aes_ctr_update)(archive_crypto_ctx *, const uint8_t *,
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size_t, uint8_t *, size_t *);
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int (*encrypto_aes_ctr_release)(archive_crypto_ctx *);
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};
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extern const struct archive_cryptor __archive_cryptor;
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#endif
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