release/src/router/libsodium/src/libsodium/crypto_core/hchacha20/core_hchacha20.h

   1 #ifndef core_hchacha20_H
   2 #define core_hchacha20_H
   3
   4 #include <stdint.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7
   8 #define U8C(v)  (v##U)
   9 #define U32C(v) (v##U)
  10
  11 #define U8V(v)  ((uint8_t)(v) & U8C(0xFF))
  12 #define U32V(v) ((uint32_t)(v) & U32C(0xFFFFFFFF))
  13
  14 #define ROTL32(v, n) (U32V((v) << (n)) | ((v) >> (32 - (n))))
  15
  16 #define ROTATE(v, c) (ROTL32(v, c))
  17 #define XOR(v, w)    ((v) ^ (w))
  18 #define PLUS(v, w)   (U32V((v) + (w)))
  19
  20 #define QUARTERROUND(a, b, c, d) \
  21   do { \
  22       a = PLUS(a, b); d = ROTATE(XOR(d, a), 16); \
  23       c = PLUS(c, d); b = ROTATE(XOR(b, c), 12); \
  24       a = PLUS(a, b); d = ROTATE(XOR(d, a),  8); \
  25       c = PLUS(c, d); b = ROTATE(XOR(b, c),  7); \
  26   } while(0)
  27
  28 #endif