/*

 * Copyright 2010-2018 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#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

#ifndef PEDANTIC

# if defined(__i386)    || defined(__i386__)    || \

     defined(__x86_64)  || defined(__x86_64__)  || \

     defined(_M_IX86)   || defined(_M_AMD64)    || defined(_M_X64) || \

     defined(__aarch64__)                       || \

     defined(__s390__)  || defined(__s390x__)

#  undef STRICT_ALIGNMENT

# endif

#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(__aarch64__)

#   define BSWAP8(x) ({ u64 ret_;                       \

                        asm ("rev %0,%1"                \

                        : "=r"(ret_) : "r"(x)); ret_;   })

#   define BSWAP4(x) ({ u32 ret_;                       \

                        asm ("rev %w0,%w1"              \

                        : "=r"(ret_) : "r"(x)); 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

#   include <stdlib.h>

#   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];

        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!

     */

#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;

#if !defined(OPENSSL_SMALL_FOOTPRINT)

    unsigned char Xn[48];

#endif

};

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;

};

#ifndef OPENSSL_NO_OCB

typedef union {

    u64 a[2];

    unsigned char c[16];

} OCB_BLOCK;

# define ocb_block16_xor(in1,in2,out) \

    ( (out)->a[0]=(in1)->a[0]^(in2)->a[0], \

      (out)->a[1]=(in1)->a[1]^(in2)->a[1] )

# if STRICT_ALIGNMENT

#  define ocb_block16_xor_misaligned(in1,in2,out) \

    ocb_block_xor((in1)->c,(in2)->c,16,(out)->c)

# else

#  define ocb_block16_xor_misaligned ocb_block16_xor

# endif

struct ocb128_context {

    /* Need both encrypt and decrypt key schedules for decryption */

    block128_f encrypt;

    block128_f decrypt;

    void *keyenc;

    void *keydec;

    ocb128_f stream;    /* direction dependent */

    /* Key dependent variables. Can be reused if key remains the same */

    size_t l_index;

    size_t max_l_index;

    OCB_BLOCK l_star;

    OCB_BLOCK l_dollar;

    OCB_BLOCK *l;

    /* Must be reset for each session */

    struct {

        u64 blocks_hashed;

        u64 blocks_processed;

        OCB_BLOCK offset_aad;

        OCB_BLOCK sum;

        OCB_BLOCK offset;

        OCB_BLOCK checksum;

    } sess;

};

#endif                          /* OPENSSL_NO_OCB */