crypto-algorithms.c

Basic implementations of standard cryptography algorithms, like AES and SHA-1
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arcfour.h (1237B)

      1 /*********************************************************************
      2 * Filename:   arcfour.h
      3 * Author:     Brad Conte (brad AT bradconte.com)
      4 * Copyright:
      5 * Disclaimer: This code is presented "as is" without any guarantees.
      6 * Details:    Defines the API for the corresponding ARCFOUR implementation.
      7 *********************************************************************/
      8 
      9 #ifndef ARCFOUR_H
     10 #define ARCFOUR_H
     11 
     12 /*************************** HEADER FILES ***************************/
     13 #include <stddef.h>
     14 
     15 /**************************** DATA TYPES ****************************/
     16 typedef unsigned char BYTE;             // 8-bit byte
     17 
     18 /*********************** FUNCTION DECLARATIONS **********************/
     19 // Input: state - the state used to generate the keystream
     20 //        key - Key to use to initialize the state
     21 //        len - length of key in bytes (valid lenth is 1 to 256)
     22 void arcfour_key_setup(BYTE state[], const BYTE key[], int len);
     23 
     24 // Pseudo-Random Generator Algorithm
     25 // Input: state - the state used to generate the keystream
     26 //        out - Must be allocated to be of at least "len" length
     27 //        len - number of bytes to generate
     28 void arcfour_generate_stream(BYTE state[], BYTE out[], size_t len);
     29 
     30 #endif   // ARCFOUR_H