modes_lcl.h

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/* ====================================================================
 * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use is governed by OpenSSL license.
 * ====================================================================
 */

#include <openssl/modes.h>


#if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__)
typedef __int64 i64;
typedef unsigned __int64 u64;
#define U64(C) C##UI64
#elif defined(__arch64__)
typedef long i64;
typedef unsigned long u64;
#define U64(C) C##UL
#else
typedef long long i64;
typedef unsigned long long u64;
#define U64(C) C##ULL
#endif

typedef unsigned int u32;
typedef unsigned char u8;

#define STRICT_ALIGNMENT 1
#if defined(__i386) || defined(__i386__)    || \
    defined(__x86_64)   || defined(__x86_64__)  || \
    defined(_M_IX86)    || defined(_M_AMD64)    || defined(_M_X64) || \
    defined(__s390__)   || defined(__s390x__)   || \
    ( (defined(__arm__) || defined(__arm)) && \
      (defined(__ARM_ARCH_7__)  || defined(__ARM_ARCH_7A__) || \
       defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__)) )
# undef STRICT_ALIGNMENT
#endif

#if !defined(PEDANTIC) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
#if defined(__GNUC__) && __GNUC__>=2
# if defined(__x86_64) || defined(__x86_64__)
#  define BSWAP8(x) ({  u64 ret=(x);            \
            asm ("bswapq %0"        \
            : "+r"(ret));   ret;        })
#  define BSWAP4(x) ({  u32 ret=(x);            \
            asm ("bswapl %0"        \
            : "+r"(ret));   ret;        })
# elif (defined(__i386) || defined(__i386__)) && !defined(I386_ONLY)
#  define BSWAP8(x) ({  u32 lo=(u64)(x)>>32,hi=(x); \
            asm ("bswapl %0; bswapl %1" \
            : "+r"(hi),"+r"(lo));       \
            (u64)hi<<32|lo;         })
#  define BSWAP4(x) ({  u32 ret=(x);            \
            asm ("bswapl %0"        \
            : "+r"(ret));   ret;        })
# elif (defined(__arm__) || defined(__arm)) && !defined(STRICT_ALIGNMENT)
#  define BSWAP8(x) ({  u32 lo=(u64)(x)>>32,hi=(x); \
            asm ("rev %0,%0; rev %1,%1" \
            : "+r"(hi),"+r"(lo));       \
            (u64)hi<<32|lo;         })
#  define BSWAP4(x) ({  u32 ret;            \
            asm ("rev %0,%1"        \
            : "=r"(ret) : "r"((u32)(x)));   \
            ret;                })
# endif
#elif defined(_MSC_VER)
# if _MSC_VER>=1300
#  pragma intrinsic(_byteswap_uint64,_byteswap_ulong)
#  define BSWAP8(x) _byteswap_uint64((u64)(x))
#  define BSWAP4(x) _byteswap_ulong((u32)(x))
# elif defined(_M_IX86)
   __inline u32 _bswap4(u32 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 u32 *)(p))
#define PUTU32(p,v) *(u32 *)(p) = BSWAP4(v)
#else
#define GETU32(p)   ((u32)(p)[0]<<24|(u32)(p)[1]<<16|(u32)(p)[2]<<8|(u32)(p)[3])
#define PUTU32(p,v) ((p)[0]=(u8)((v)>>24),(p)[1]=(u8)((v)>>16),(p)[2]=(u8)((v)>>8),(p)[3]=(u8)(v))
#endif

/* GCM definitions */

typedef struct { u64 hi,lo; } u128;

#ifdef  TABLE_BITS
#undef  TABLE_BITS
#endif
/*
 * Even though permitted values for TABLE_BITS are 8, 4 and 1, it should
 * never be set to 8 [or 1]. For further information see gcm128.c.
 */
#define TABLE_BITS 4

struct gcm128_context {
    /* Following 6 names follow names in GCM specification */
    union { u64 u[2]; u32 d[4]; u8 c[16]; } 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! */
#if TABLE_BITS==8
    u128 Htable[256];
#else
    u128 Htable[16];
    void (*gmult)(u64 Xi[2],const u128 Htable[16]);
    void (*ghash)(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
#endif
    unsigned int mres, ares;
    block128_f block;
    void *key;
};

struct xts128_context {
    void      *key1, *key2;
    block128_f block1,block2;
};

struct ccm128_context {
    union { u64 u[2]; u8 c[16]; } nonce, cmac;
    u64 blocks;
    block128_f block;
    void *key;
};