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sha256.h (1321B)
1 /*********************************************************************
2 * Filename: sha256.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 SHA1 implementation.
7 *********************************************************************/
8
9 #ifndef SHA256_H
10 #define SHA256_H
11
12 /**
13 * sha256S returns the hash in the form of a hex string
14 */
15 char *sha256S(const char *bufferToHash);
16
17 /*************************** HEADER FILES ***************************/
18 #include <stddef.h>
19
20 /****************************** MACROS ******************************/
21 #define SHA256_BLOCK_SIZE 32 // SHA256 outputs a 32 byte digest
22
23 /**************************** DATA TYPES ****************************/
24 typedef unsigned char BYTE; // 8-bit byte
25 typedef unsigned int WORD; // 32-bit word, change to "long" for 16-bit machines
26
27 typedef struct {
28 BYTE data[64];
29 WORD datalen;
30 unsigned long long bitlen;
31 WORD state[8];
32 } SHA256_CTX;
33
34 /*********************** FUNCTION DECLARATIONS **********************/
35 void sha256_init(SHA256_CTX *ctx);
36 void sha256_update(SHA256_CTX *ctx, const BYTE data[], size_t len);
37 void sha256_final(SHA256_CTX *ctx, BYTE hash[]);
38
39 #endif // SHA256_H