// http://en.wikipedia.org/wiki/RC4#Test_vectors
// gcc tvh.c x.c
#include <stdio.h>
#include <string.h>
typedef unsigned char ch;
typedef struct {ch s[256]; ch i; ch j;} state;
void mv(ch *, state *, int);
void initst(state *, ch *);
typedef struct {ch * key; ch * pt;} tv;
tv t[] = {{(ch*)"Key", (ch*)"Plaintext"}, // BBF316E8D940AF0AD3
          {(ch*)"Wiki", (ch*)"pedia"}, // 1021BF0420
          {(ch*)"Secret", (ch*)"Attack at dawn"}}; // 45A01F645FC35B383552544B9BF5
ch ans[100];
state s;
int main(){
  {int q; for(q=0; q<sizeof(t)/sizeof(tv); ++q)
    {ch * pt = t[q].pt;
    int ts=strlen((char*)pt);
  //  printf("%d, %s\n", ts, (char*)pt);
     initst(&s, t[q].key);
     mv(ans, &s, ts);
     {int j; for(j=0; j<ts; ++j) printf("%02X", ans[j]^pt[j]);}
     printf("\n");}}
  return 0;}

/*
9, Plaintext
bbf316e8d940af0ad3
5, pedia
1021bf0420
14, Attack at dawn
45a01f645fc35b383552544b9bf5
*/