release/src/router/libsodium/src/libsodium/crypto_stream/aes128ctr/portable/common_aes128ctr.c

   1 #include "common.h"
   2
   3 uint32 load32_bigendian(const unsigned char *x)
   4 {
   5   return
   6       (uint32) (x[3]) \
   7   | (((uint32) (x[2])) << 8) \
   8   | (((uint32) (x[1])) << 16) \
   9   | (((uint32) (x[0])) << 24)
  10   ;
  11 }
  12
  13 void store32_bigendian(unsigned char *x,uint32 u)
  14 {
  15   x[3] = u; u >>= 8;
  16   x[2] = u; u >>= 8;
  17   x[1] = u; u >>= 8;
  18   x[0] = u;
  19 }
  20
  21 uint32 load32_littleendian(const unsigned char *x)
  22 {
  23   return
  24       (uint32) (x[0]) \
  25   | (((uint32) (x[1])) << 8) \
  26   | (((uint32) (x[2])) << 16) \
  27   | (((uint32) (x[3])) << 24)
  28   ;
  29 }
  30
  31 void store32_littleendian(unsigned char *x,uint32 u)
  32 {
  33   x[0] = u; u >>= 8;
  34   x[1] = u; u >>= 8;
  35   x[2] = u; u >>= 8;
  36   x[3] = u;
  37 }
  38
  39
  40 uint64 load64_littleendian(const unsigned char *x)
  41 {
  42   return
  43       (uint64) (x[0]) \
  44   | (((uint64) (x[1])) << 8) \
  45   | (((uint64) (x[2])) << 16) \
  46   | (((uint64) (x[3])) << 24)
  47   | (((uint64) (x[4])) << 32)
  48   | (((uint64) (x[5])) << 40)
  49   | (((uint64) (x[6])) << 48)
  50   | (((uint64) (x[7])) << 56)
  51   ;
  52 }
  53
  54 void store64_littleendian(unsigned char *x,uint64 u)
  55 {
  56   x[0] = u; u >>= 8;
  57   x[1] = u; u >>= 8;
  58   x[2] = u; u >>= 8;
  59   x[3] = u; u >>= 8;
  60   x[4] = u; u >>= 8;
  61   x[5] = u; u >>= 8;
  62   x[6] = u; u >>= 8;
  63   x[7] = u;
  64 }