SHA-2xx common

Implementation of common functionality for SHA-224/256 hashing functions. More...

Detailed Description

Implementation of common functionality for SHA-224/256 hashing functions.

Files
file	sha2xx_common.h
	Common definitions for the SHA-224/256 hash functions.

Data Structures
struct	sha2xx_context_t
	Structure to hold the SHA-2XX context. More...

Functions
void	sha2xx_pad (sha2xx_context_t *ctx)
	SHA-2XX initialization. More...
void	sha2xx_update (sha2xx_context_t *ctx, const void *data, size_t len)
	Add bytes into the hash. More...
void	sha2xx_final (sha2xx_context_t *ctx, void *digest, size_t dig_len)
	SHA-2XX finalization. More...

Variables
static const uint32_t	K [64]
	SHA-224 and SHA-256 Constants. More...
#define	Ch(x, y, z)   ((x & (y ^ z)) ^ z)
	Elementary functions used by SHA2XX.
#define	Maj(x, y, z)   ((x & (y | z)) | (y & z))
#define	SHR(x, n)   (x >> n)
#define	ROTR(x, n)   ((x >> n) | (x << (32 - n)))
#define	S0(x)   (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
#define	S1(x)   (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
#define	s0(x)   (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
#define	s1(x)   (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))

Function Documentation

sha2xx_final()

void sha2xx_final	(	sha2xx_context_t *	ctx,
		void *	digest,
		size_t	dig_len
	)

SHA-2XX finalization.

Pads the input data, exports the hash value, and clears the context state.

Parameters

ctx	sha2xx_context_t handle to use
digest	resulting digest, this is the hash of all the bytes
dig_len	Length of digest

sha2xx_pad()

void sha2xx_pad

(

sha2xx_context_t *

ctx

)

SHA-2XX initialization.

Begins a SHA-2XX operation.

Parameters

ctx	sha2xx_context_t handle to init

sha2xx_update()

void sha2xx_update	(	sha2xx_context_t *	ctx,
		const void *	data,
		size_t	len
	)

Add bytes into the hash.

Parameters

	ctx	sha2xx_context_t handle to use
[in]	data	Input data
[in]	len	Length of data

Variable Documentation

K

const uint32_t K[64]

static

Initial value:

= {
    0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
    0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
    0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
    0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
    0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
    0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
    0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
    0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
    0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
    0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
    0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
    0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
    0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
    0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
    0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
    0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,
}

SHA-224 and SHA-256 Constants.

Definition at line 87 of file sha2xx_common.h.