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#ifndef SHA256
#define SHA256
#include "iw.h"
#define SHA256_BLOCK_SIZE 64
#define LOAD32B(addr) \
((__u32)((addr)[0] << 24) | ((addr)[1] << 16) | \
((addr)[2] << 8) | (addr)[3])
#define STORE64B(addr, data) \
do { (addr)[0] = (__u8)((data) >> 56); (addr)[1] = (__u8)((data) >> 48); \
(addr)[2] = (__u8)((data) >> 40); (addr)[3] = (__u8)((data) >> 32); \
(addr)[4] = (__u8)((data) >> 24); (addr)[5] = (__u8)((data) >> 16); \
(addr)[6] = (__u8)((data) >> 8); (addr)[7] = (__u8)((data) & 0xff); \
} while (0)
#define STORE32B(addr, data) \
do { (addr)[0] = (__u8)(((data) >> 24) & 0xff); \
(addr)[1] = (__u8)(((data) >> 16) & 0xff); \
(addr)[2] = (__u8)(((data) >> 8) & 0xff); \
(addr)[3] = (__u8)((data) & 0xff); } while (0)
struct sha256_state {
__u64 length;
__u32 state[8], curlen;
__u8 buf[SHA256_BLOCK_SIZE];
};
/**
* SHA256 Hashing
* @addr: pointers to the data area
* @len: Lengths of the data block
* @res: Buffer for the digest
* Returns: 0 on success, -1 of failure
*/
int sha256(const unsigned char *addr, const size_t len,
unsigned char *res);
/* Initialize the hash state */
void sha256_init(struct sha256_state *md);
/**
* Process a block of memory though the hash
* @param md The hash state
* @param in The data to hash
* @param inlen The length of the data (octets)
* @return CRYPT_OK if successful
*/
int sha256_process(struct sha256_state *md, const unsigned char *in,
unsigned long inlen);
/**
* Terminate the hash to get the digest
* @param md The hash state
* @param out [out] The destination of the hash (32 bytes)
* @return CRYPT_OK if successful
*/
int sha256_done(struct sha256_state *md, unsigned char *out);
#endif
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