#include

#include

#include

typedef uint8_t byte;

typedef struct

{

byte i, j;

byte S[256];

} Rc4State;

void swap(byte *a, byte *b)

{

byte temp = *a;

*a = *b;

*b = temp;

}

/*Initialization & initial permutation

also initialize i&j counters in state for stream generation*/

void initState(const byte K[256], int keylen, Rc4State *state)

{

byte T[256];

assert(keylen>=1 && keylen

int i;

for(i = 0; i

state-> S[i] = i;

T[i] = K[i % keylen];

}

//Initial permutation of S

byte *S = state->S;

int j = 0;

for(i = 0; i

j = (j + S[i] + T[i]) % 256;

swap(&S[i], &S[j]);

}

//Initialize counters in state

state->i = state->j = 0;

}

/*Encrypt/Decrypt text by XORing with next byte of keystream*/

byte crypt(byte text, Rc4State *state)

{

byte t, k;

byte *i = &(state->i), *j = &(state->j);

byte *S = state->S;

*i = (*i+1) % 256;

*j = (*j+S[*i]) % 256;

swap(&S[*i], &S[*j]);

t = (S[*i] + S[*j]) % 256;

k = S[t];

return text ^ k;

}

static byte rc4CryptByte(Rc4State *state, byte plainText)

{

byte *S = state->S;

byte i = ++(state->i);

byte j = (state->j += S[i]);

swap(&S[i], &S[j]);

byte t = S[i] + S[j];

byte k = S[t];

return plainText ^ k;

}

void rc4Crypt(Rc4State *state, byte text[], size_t len)

{

for (size_t i = 0; i

{

text[i] = rc4CryptByte(state, text[i]);

}

}

This is a program

I am trying to run

But I do not know how to run

Can you explain me how to run with visual studio using step by step

How to set it up

Using Visual Basic

C++ thank u

It will help me a lot thank u

MetroPCS 10:48 AM * 57% Done program 1.txt include #include #include typedef uint8 t byte; typedef struct byte i, j byte S[256]; Rc4State; void swap(byte *a, byte *b) byte tempa; *a = *b; *b = temp ; /*Initialization & initial permutation also initialize i&j counters in state for stream generation/ void initState(const byte K[256], int keylen, Rc4State *state) byte T[256]; assert ( keylen>=1 && int i; for ( i = 0; i s [ i ] i ; //Initial permutation of S byte *S = state->S ; int j = 0; for ( i = 0; i j = 0; 1