crypto-algorithms.c

Basic implementations of standard cryptography algorithms, like AES and SHA-1
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md5.h (1186B)

      1 /*********************************************************************
      2 * Filename:   md5.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 MD5 implementation.
      7 *********************************************************************/
      8 
      9 #ifndef MD5_H
     10 #define MD5_H
     11 
     12 /*************************** HEADER FILES ***************************/
     13 #include <stddef.h>
     14 
     15 /****************************** MACROS ******************************/
     16 #define MD5_BLOCK_SIZE 16               // MD5 outputs a 16 byte digest
     17 
     18 /**************************** DATA TYPES ****************************/
     19 typedef unsigned char BYTE;             // 8-bit byte
     20 typedef unsigned int  WORD;             // 32-bit word, change to "long" for 16-bit machines
     21 
     22 typedef struct {
     23    BYTE data[64];
     24    WORD datalen;
     25    unsigned long long bitlen;
     26    WORD state[4];
     27 } MD5_CTX;
     28 
     29 /*********************** FUNCTION DECLARATIONS **********************/
     30 void md5_init(MD5_CTX *ctx);
     31 void md5_update(MD5_CTX *ctx, const BYTE data[], size_t len);
     32 void md5_final(MD5_CTX *ctx, BYTE hash[]);
     33 
     34 #endif   // MD5_H