SHA2-512 Hashing and digest functions

SHA2-512 Hashing checking and HMAC Functions. More...

Functions
void	sha512sum2 (unsigned char *buff, const void *data, unsigned long len, const void *data2, unsigned long len2)
	Calculate the SHA2-512 hash accross 2 data chunks. More...
void	sha512sum (unsigned char *buff, const void *data, unsigned long len)
	Calculate the SHA2-512 hash. More...
int	sha512cmp (unsigned char *digest1, unsigned char *digest2)
	Compare two SHA2-512 hashes. More...
void	sha512hmac (unsigned char *buff, const void *data, unsigned long len, const void *key, unsigned long klen)
	Hash Message Authentication Codes (HMAC) SHA2-512. More...

Detailed Description

SHA2-512 Hashing checking and HMAC Functions.

Function Documentation

int sha512cmp	(	unsigned char *	digest1,
		unsigned char *	digest2
	)

Compare two SHA2-512 hashes.

Parameters

digest1	Digest to compare.
digest2	Digest to compare.

Returns

0 on equality.

Definition at line 253 of file util.c.

                                                                     {
    return (_digest_cmp(digest1, digest2, 64));
}

void sha512hmac	(	unsigned char *	buff,
		const void *	data,
		unsigned long	len,
		const void *	key,
		unsigned long	klen
	)

Hash Message Authentication Codes (HMAC) SHA2-512.

Parameters

buff	HMAC returned in this buffer (64 bytes).
data	Data to sign.
len	Length of data.
key	Key to signwith.
klen	Length of key.

Definition at line 326 of file util.c.

References sha512sum2().

                                                                                                                      {
    _hmac(buff, data, len, key, klen, sha512sum2, 64);
}

void sha512sum	(	unsigned char *	buff,
		const void *	data,
		unsigned long	len
	)

Calculate the SHA2-512 hash.

Parameters

buff	buffer to place the hash (64 bytes).
data	First data chunk to calculate.
len	Length of data.

Definition at line 114 of file util.c.

References sha512sum2().

                                                                                {
    sha512sum2(buff, data, len, NULL, 0);
}

void sha512sum2	(	unsigned char *	buff,
		const void *	data,
		unsigned long	len,
		const void *	data2,
		unsigned long	len2
	)

Calculate the SHA2-512 hash accross 2 data chunks.

Parameters

buff	buffer to place the hash (64 bytes).
data	First data chunk to calculate.
len	Length of data.
data2	Second data chunk to calculate.
len2	Length of data2.

Definition at line 97 of file util.c.

Referenced by sha512hmac(), and sha512sum().

                                                                                                                        {
    SHA512_CTX c;

    SHA512_Init(&c);
    SHA512_Update(&c, data, len);
    if (data2) {
        SHA512_Update(&c, data2, len2);
    }
    SHA512_Final(buff, &c);
}