| 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 | /*************************** HEADER FILES ***************************/ |
| 13 | #include <stddef.h> |
| 14 | |
| 15 | /****************************** MACROS ******************************/ |
| 16 | #define SHA256_BLOCK_SIZE 32 // SHA256 outputs a 32 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[8]; |
| 27 | } SHA256_CTX; |
| 28 | |
| 29 | /*********************** FUNCTION DECLARATIONS **********************/ |
| 30 | void sha256_init(SHA256_CTX *ctx); |
| 31 | void sha256_update(SHA256_CTX *ctx, const BYTE data[], size_t len); |
| 32 | void sha256_final(SHA256_CTX *ctx, BYTE hash[]); |
| 33 | |
| 34 | #endif // SHA256_H |