/** Encrypt (or decrypt) bytes of ciphertext (or plaintext) with RC4 @param key The key @param keylen The key length @param datain The plaintext (or ciphertext) @param datalen The length of the input and output (octets) @param dataout [out] The ciphertext (or plaintext) @return CRYPT_OK if successful */ int rc4_stream_memory(const unsigned char *key, unsigned long keylen, const unsigned char *datain, unsigned long datalen, unsigned char *dataout) { rc4_state st; int err; if ((err = rc4_stream_setup(&st, key, keylen)) != CRYPT_OK) goto WIPE_KEY; err = rc4_stream_crypt(&st, datain, datalen, dataout); WIPE_KEY: rc4_stream_done(&st); return err; }
int rc4_stream_test(void) { #ifndef LTC_TEST return CRYPT_NOP; #else rc4_state st; int err; const unsigned char key[] = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef }; const unsigned char pt[] = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef }; const unsigned char ct[] = { 0x75, 0xb7, 0x87, 0x80, 0x99, 0xe0, 0xc5, 0x96 }; unsigned char buf[10]; if ((err = rc4_stream_setup(&st, key, sizeof(key))) != CRYPT_OK) return err; if ((err = rc4_stream_crypt(&st, pt, sizeof(pt), buf)) != CRYPT_OK) return err; if (compare_testvector(buf, sizeof(ct), ct, sizeof(ct), "RC4", 0)) return CRYPT_FAIL_TESTVECTOR; if ((err = rc4_stream_done(&st)) != CRYPT_OK) return err; return CRYPT_OK; #endif }