/* * Copyright (c) 2012 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #ifndef _CRYPTO_AESXTS_H #define _CRYPTO_AESXTS_H #if defined(__cplusplus) extern "C" { #endif #include <corecrypto/ccmode.h> #include <corecrypto/ccaes.h> #include <corecrypto/ccn.h> //Unholy HACK: this works because we know the size of the context for every //possible corecrypto implementation is less than this. #define AES_XTS_CTX_MAX_SIZE (ccn_sizeof_size(3*sizeof(void *)) + 2*ccn_sizeof_size(128*4) + ccn_sizeof_size(16)) typedef struct { ccxts_ctx_decl(AES_XTS_CTX_MAX_SIZE, enc); ccxts_ctx_decl(AES_XTS_CTX_MAX_SIZE, dec); } symmetric_xts; /* * These are the interfaces required for XTS-AES support */ uint32_t xts_start(uint32_t cipher, // ignored - we're doing this for xts-aes only const uint8_t *IV, // ignored const uint8_t *key1, int keylen, const uint8_t *key2, int tweaklen, // both keys are the same size for xts uint32_t num_rounds, // ignored uint32_t options, // ignored symmetric_xts *xts); int xts_encrypt(const uint8_t *pt, unsigned long ptlen, uint8_t *ct, const uint8_t *tweak, // this can be considered the sector IV for this use symmetric_xts *xts); int xts_decrypt(const uint8_t *ct, unsigned long ptlen, uint8_t *pt, const uint8_t *tweak, // this can be considered the sector IV for this use symmetric_xts *xts); void xts_done(symmetric_xts *xts); #if defined(__cplusplus) } #endif #endif