text: /* ====================================================================
   * 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(__aarch64__)			|| \
      defined(__s390__)	|| defined(__s390x__)
  # 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(__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
  #  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;
  };
  
  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;
  };
  
  