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boringssl/crypto/modes/internal.h
Matt Braithwaite 12fe1b25ea Re-add the C version (only) of |EVP_aes_256_xts| 
Change-Id: I63c70f93a0f9395673c9fbe01eb5d864a14a48b6
Reviewed-on: https://boringssl-review.googlesource.com/5520
Reviewed-by: Adam Langley <agl@google.com>
Reviewed-by: Matt Braithwaite <mab@google.com>
2015-08-19 01:35:50 +00:00

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/* ====================================================================
* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ==================================================================== */
#ifndef OPENSSL_HEADER_MODES_INTERNAL_H
#define OPENSSL_HEADER_MODES_INTERNAL_H
#include <openssl/base.h>
#if defined(__cplusplus)
extern "C" {
#endif
#define asm __asm__
#define STRICT_ALIGNMENT 1
#if defined(OPENSSL_X86_64) || defined(OPENSSL_X86) || defined(OPENSSL_AARCH64)
#undef STRICT_ALIGNMENT
#define STRICT_ALIGNMENT 0
#endif
#if !defined(PEDANTIC) && !defined(OPENSSL_NO_ASM)
#if defined(__GNUC__) && __GNUC__ >= 2
#if defined(OPENSSL_X86_64)
#define BSWAP8(x) \
({ \
uint64_t ret = (x); \
asm("bswapq %0" : "+r"(ret)); \
ret; \
})
#define BSWAP4(x) \
({ \
uint32_t ret = (x); \
asm("bswapl %0" : "+r"(ret)); \
ret; \
})
#elif defined(OPENSSL_X86)
#define BSWAP8(x) \
({ \
uint32_t lo = (uint64_t)(x) >> 32, hi = (x); \
asm("bswapl %0; bswapl %1" : "+r"(hi), "+r"(lo)); \
(uint64_t) hi << 32 | lo; \
})
#define BSWAP4(x) \
({ \
uint32_t ret = (x); \
asm("bswapl %0" : "+r"(ret)); \
ret; \
})
#elif defined(OPENSSL_AARCH64)
#define BSWAP8(x) \
({ \
uint64_t ret; \
asm("rev %0,%1" : "=r"(ret) : "r"(x)); \
ret; \
})
#define BSWAP4(x) \
({ \
uint32_t ret; \
asm("rev %w0,%w1" : "=r"(ret) : "r"(x)); \
ret; \
})
#elif defined(OPENSSL_ARM) && !defined(STRICT_ALIGNMENT)
#define BSWAP8(x) \
({ \
uint32_t lo = (uint64_t)(x) >> 32, hi = (x); \
asm("rev %0,%0; rev %1,%1" : "+r"(hi), "+r"(lo)); \
(uint64_t) hi << 32 | lo; \
})
#define BSWAP4(x) \
({ \
uint32_t ret; \
asm("rev %0,%1" : "=r"(ret) : "r"((uint32_t)(x))); \
ret; \
})
#endif
#elif defined(_MSC_VER)
#if _MSC_VER >= 1300
#pragma warning(push, 3)
#include <intrin.h>
#pragma warning(pop)
#pragma intrinsic(_byteswap_uint64, _byteswap_ulong)
#define BSWAP8(x) _byteswap_uint64((uint64_t)(x))
#define BSWAP4(x) _byteswap_ulong((uint32_t)(x))
#elif defined(OPENSSL_X86)
__inline uint32_t _bswap4(uint32_t val) {
_asm mov eax, val
_asm bswap eax
}
#define BSWAP4(x) _bswap4(x)
#endif
#endif
#endif
#if defined(BSWAP4) && !defined(STRICT_ALIGNMENT)
#define GETU32(p) BSWAP4(*(const uint32_t *)(p))
#define PUTU32(p, v) *(uint32_t *)(p) = BSWAP4(v)
#else
#define GETU32(p) \
((uint32_t)(p)[0] << 24 | (uint32_t)(p)[1] << 16 | (uint32_t)(p)[2] << 8 | (uint32_t)(p)[3])
#define PUTU32(p, v) \
((p)[0] = (uint8_t)((v) >> 24), (p)[1] = (uint8_t)((v) >> 16), \
(p)[2] = (uint8_t)((v) >> 8), (p)[3] = (uint8_t)(v))
#endif
/* GCM definitions */
typedef struct { uint64_t hi,lo; } u128;
struct gcm128_context {
/* Following 6 names follow names in GCM specification */
union {
uint64_t u[2];
uint32_t d[4];
uint8_t c[16];
size_t t[16 / sizeof(size_t)];
} Yi, EKi, EK0, len, Xi, H;
/* Relative position of Xi, H and pre-computed Htable is used in some
* assembler modules, i.e. don't change the order! */
u128 Htable[16];
void (*gmult)(uint64_t Xi[2], const u128 Htable[16]);
void (*ghash)(uint64_t Xi[2], const u128 Htable[16], const uint8_t *inp,
size_t len);
unsigned int mres, ares;
block128_f block;
void *key;
};
struct ccm128_context {
union {
uint64_t u[2];
uint8_t c[16];
} nonce, cmac;
uint64_t blocks;
block128_f block;
void *key;
};
#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
/* crypto_gcm_clmul_enabled returns one if the CLMUL implementation of GCM is
* used. */
int crypto_gcm_clmul_enabled(void);
#endif
#if defined(__cplusplus)
} /* extern C */
#endif
#endif /* OPENSSL_HEADER_MODES_INTERNAL_H */
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