/* File: RC4.mm Program: KisMAC */ //#include #include #include #include #define N 256 extern unsigned char Identity[N]; typedef struct RC4_t { unsigned char S[N]; unsigned char i, j; } RC4; void RC4init(RC4 *that); void keyStep(RC4 *that, unsigned char *K, int l); void RC4InitWithKey(RC4 *that, unsigned char *K, int l); int step(RC4 *that); void setupIdentity(void); //#include "RC4.h" #define Q 255 #define NORM(x) ((x) & Q) #define SWAP(i,j) do {int t = that->S[i]; that->S[i] = that->S[j]; that->S[j] = t;} while(0) unsigned char Identity[N]; void RC4init(RC4 *that) { memcpy(that->S, Identity, sizeof(unsigned char) * N); that->i = that->j = 0; } void keyStep(RC4 *that, unsigned char *K,int l) { that->j += (that->S)[that->i] + K[that->i % l]; SWAP(that->i, that->j); (that->i)++; } void RC4InitWithKey(RC4 *that, unsigned char *K, int l) { int a; RC4init(that); for (a = 0; a < N; a++) keyStep(that, K, l); that->i = that->j = 0; } int step(RC4 *that) { (that->i)++; that->j += that->S[that->i]; SWAP(that->i, that->j); return (that->S[NORM(that->S[that->i] + that->S[that->j])]); } void setupIdentity() { int a; for(a = 0; a < N; a++) Identity[a] = a; } #define Blen 8 #define Klen 8 /* uses: void RC4init(RC4 *that); void keyStep(RC4 *that, unsigned char *K, int l); void RC4InitWithKey(RC4 *that, unsigned char *K, int l); int step(RC4 *that); void setupIdentity(void); */ unsigned char *buffer_ptr, *buffer_orig_pnt; // pntr for data buffers int buffer_len = 8; // data buffer length in bytes unsigned char buffer_orig[Blen]; // working buffer /* Test vector 0 Key: 0x01 0x23 0x45 0x67 0x89 0xab 0xcd 0xef Input: 0x01 0x23 0x45 0x67 0x89 0xab 0xcd 0xef 0 Output: 0x75 0xb7 0x87 0x80 0x99 0xe0 0xc5 0x96 */ // RC4 Test Code unsigned char key_data[] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef}; int key_data_len = 8; unsigned char input_data[] = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef}; int input_data_len = 8; unsigned char test_vector[] = {0x75, 0xb7, 0x87, 0x80, 0x99, 0xe0, 0xc5, 0x96}; int test_vector_len = 8; int main (int argc, const char * argv[]) { // insert code here... int i, cnt, tvr; RC4 rc, *prc; unsigned char key[key_data_len]; // key data unsigned char buffer[input_data_len]; // input data length prc = &rc; printf( "\nnew _Kismac_RC4 test program and test vectors\n" ); // copy key_data to key for( i = 0; i < key_data_len; i++ ) { key[i] = key_data[i];} // copy data to working buffer for( i = 0; i

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