lib/libcrypto/modes/modes_lcl.h

   1 /* $OpenBSD: modes_lcl.h,v 1.10 2016/12/21 15:49:29 jsing Exp $ */
   2 /* ====================================================================
   3  * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
   4  *
   5  * Redistribution and use is governed by OpenSSL license.
   6  * ====================================================================
   7  */
   8
   9 #include <machine/endian.h>
  10
  11 #include <openssl/opensslconf.h>
  12
  13 #include <openssl/modes.h>
  14
  15 __BEGIN_HIDDEN_DECLS
  16
  17 #if defined(_LP64)
  18 typedef long i64;
  19 typedef unsigned long u64;
  20 #define U64(C) C##UL
  21 #else
  22 typedef long long i64;
  23 typedef unsigned long long u64;
  24 #define U64(C) C##ULL
  25 #endif
  26
  27 typedef unsigned int u32;
  28 typedef unsigned char u8;
  29
  30 #if !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
  31 #if defined(__GNUC__) && __GNUC__>=2
  32 # if defined(__x86_64) || defined(__x86_64__)
  33 #  define BSWAP8(x) ({  u64 ret=(x);                    \
  34                         asm ("bswapq %0"                \
  35                         : "+r"(ret));   ret;            })
  36 #  define BSWAP4(x) ({  u32 ret=(x);                    \
  37                         asm ("bswapl %0"                \
  38                         : "+r"(ret));   ret;            })
  39 # elif (defined(__i386) || defined(__i386__))
  40 #  define BSWAP8(x) ({  u32 lo=(u64)(x)>>32,hi=(x);     \
  41                         asm ("bswapl %0; bswapl %1"     \
  42                         : "+r"(hi),"+r"(lo));           \
  43                         (u64)hi<<32|lo;                 })
  44 #  define BSWAP4(x) ({  u32 ret=(x);                    \
  45                         asm ("bswapl %0"                \
  46                         : "+r"(ret));   ret;            })
  47 # elif (defined(__arm__) || defined(__arm)) && !defined(__STRICT_ALIGNMENT)
  48 #  define BSWAP8(x) ({  u32 lo=(u64)(x)>>32,hi=(x);     \
  49                         asm ("rev %0,%0; rev %1,%1"     \
  50                         : "+r"(hi),"+r"(lo));           \
  51                         (u64)hi<<32|lo;                 })
  52 #  define BSWAP4(x) ({  u32 ret;                        \
  53                         asm ("rev %0,%1"                \
  54                         : "=r"(ret) : "r"((u32)(x)));   \
  55                         ret;                            })
  56 # endif
  57 #endif
  58 #endif
  59
  60 #if defined(BSWAP4) && !defined(__STRICT_ALIGNMENT)
  61 #define GETU32(p)       BSWAP4(*(const u32 *)(p))
  62 #define PUTU32(p,v)     *(u32 *)(p) = BSWAP4(v)
  63 #else
  64 #define GETU32(p)       ((u32)(p)[0]<<24|(u32)(p)[1]<<16|(u32)(p)[2]<<8|(u32)(p)[3])
  65 #define PUTU32(p,v)     ((p)[0]=(u8)((v)>>24),(p)[1]=(u8)((v)>>16),(p)[2]=(u8)((v)>>8),(p)[3]=(u8)(v))
  66 #endif
  67
  68 /* GCM definitions */
  69
  70 typedef struct { u64 hi,lo; } u128;
  71
  72 #ifdef  TABLE_BITS
  73 #undef  TABLE_BITS
  74 #endif
  75 /*
  76  * Even though permitted values for TABLE_BITS are 8, 4 and 1, it should
  77  * never be set to 8 [or 1]. For further information see gcm128.c.
  78  */
  79 #define TABLE_BITS 4
  80
  81 struct gcm128_context {
  82         /* Following 6 names follow names in GCM specification */
  83         union { u64 u[2]; u32 d[4]; u8 c[16]; size_t t[16/sizeof(size_t)]; }
  84           Yi,EKi,EK0,len,Xi,H;
  85         /* Relative position of Xi, H and pre-computed Htable is used
  86          * in some assembler modules, i.e. don't change the order! */
  87 #if TABLE_BITS==8
  88         u128 Htable[256];
  89 #else
  90         u128 Htable[16];
  91         void (*gmult)(u64 Xi[2],const u128 Htable[16]);
  92         void (*ghash)(u64 Xi[2],const u128 Htable[16],const u8 *inp,size_t len);
  93 #endif
  94         unsigned int mres, ares;
  95         block128_f block;
  96         void *key;
  97 };
  98
  99 struct xts128_context {
 100         void      *key1, *key2;
 101         block128_f block1,block2;
 102 };
 103
 104 struct ccm128_context {
 105         union { u64 u[2]; u8 c[16]; } nonce, cmac;
 106         u64 blocks;
 107         block128_f block;
 108         void *key;
 109 };
 110
 111 __END_HIDDEN_DECLS