#include <stdio.h>
#include "crypto_core_salsa20.h"

unsigned char k[32] = {
 0xee,0x30,0x4f,0xca,0x27,0x00,0x8d,0x8c
,0x12,0x6f,0x90,0x02,0x79,0x01,0xd8,0x0f
,0x7f,0x1d,0x8b,0x8d,0xc9,0x36,0xcf,0x3b
,0x9f,0x81,0x96,0x92,0x82,0x7e,0x57,0x77
} ;

unsigned char in[16] = {
 0x81,0x91,0x8e,0xf2,0xa5,0xe0,0xda,0x9b
,0x3e,0x90,0x60,0x52,0x1e,0x4b,0xb3,0x52
} ;

unsigned char c[16] = {
 101,120,112, 97,110,100, 32, 51
, 50, 45, 98,121,116,101, 32,107
} ;

unsigned char out[64];

void print(unsigned char *x,unsigned char *y)
{
  int i;
  unsigned int borrow = 0;
  for (i = 0;i < 4;++i) {
    unsigned int xi = x[i];
    unsigned int yi = y[i];
    printf(",0x%02x",255 & (xi - yi - borrow));
    borrow = (xi < yi + borrow);
  }
}

int main()
{
  crypto_core_salsa20(out,in,k,c);
  print(out,c);
  print(out + 20,c + 4); printf("\n");
  print(out + 40,c + 8);
  print(out + 60,c + 12); printf("\n");
  print(out + 24,in);
  print(out + 28,in + 4); printf("\n");
  print(out + 32,in + 8);
  print(out + 36,in + 12); printf("\n");
  return 0;
}
