sha256.h File Reference

Calculation of SHA-256 digest. More...

#include "mhd_options.h"
#include <stdint.h>

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Data Structures
struct	Sha256Ctx

Macros
#define	SHA256_DIGEST_SIZE_WORDS   8
#define	SHA256_WORD_SIZE_BITS   32
#define	SHA256_BYTES_IN_WORD   (SHA256_WORD_SIZE_BITS / 8)
#define	SHA256_DIGEST_SIZE   (SHA256_DIGEST_SIZE_WORDS * SHA256_BYTES_IN_WORD)
#define	SHA256_DIGEST_STRING_SIZE   ((SHA256_DIGEST_SIZE) * 2 + 1)
#define	SHA256_BLOCK_SIZE_BITS   512
#define	SHA256_BLOCK_SIZE   (SHA256_BLOCK_SIZE_BITS / 8)
#define	SHA256_BLOCK_SIZE_WORDS   (SHA256_BLOCK_SIZE_BITS / SHA256_WORD_SIZE_BITS)
#define	MHD_SHA256_HAS_FINISH   1

Functions
void	MHD_SHA256_init (struct Sha256Ctx *ctx)
void	MHD_SHA256_update (struct Sha256Ctx *ctx, const uint8_t *data, size_t length)
void	MHD_SHA256_finish (struct Sha256Ctx *ctx, uint8_t digest[SHA256_DIGEST_SIZE])

Detailed Description

Calculation of SHA-256 digest.

Author

Karlson2k (Evgeny Grin)

Definition in file sha256.h.

Macro Definition Documentation

MHD_SHA256_HAS_FINISH

#define MHD_SHA256_HAS_FINISH   1

Indicates that function MHD_SHA256_finish() (without context reset) is available

Definition at line 120 of file sha256.h.

SHA256_BLOCK_SIZE

#define SHA256_BLOCK_SIZE   (SHA256_BLOCK_SIZE_BITS / 8)

Size of single processing block in bytes

Definition at line 70 of file sha256.h.

Referenced by MHD_SHA256_finish(), MHD_SHA256_update(), and sha256_transform().

SHA256_BLOCK_SIZE_BITS

#define SHA256_BLOCK_SIZE_BITS   512

Size of single processing block in bits

Definition at line 65 of file sha256.h.

SHA256_BLOCK_SIZE_WORDS

#define SHA256_BLOCK_SIZE_WORDS   (SHA256_BLOCK_SIZE_BITS / SHA256_WORD_SIZE_BITS)

Size of single processing block in bytes

Definition at line 75 of file sha256.h.

Referenced by MHD_SHA256_finish().

SHA256_BYTES_IN_WORD

#define SHA256_BYTES_IN_WORD   (SHA256_WORD_SIZE_BITS / 8)

Number of bytes in single SHA-256 word used to process data

Definition at line 50 of file sha256.h.

Referenced by MHD_SHA256_finish().

SHA256_DIGEST_SIZE

#define SHA256_DIGEST_SIZE   (SHA256_DIGEST_SIZE_WORDS * SHA256_BYTES_IN_WORD)

Size of SHA-256 digest in bytes

Definition at line 55 of file sha256.h.

Referenced by digest_get_hash_size(), digest_get_size(), MHD_SHA256_finish(), and MHD_SHA256_finish_reset().

SHA256_DIGEST_SIZE_WORDS

#define SHA256_DIGEST_SIZE_WORDS   8

Digest is kept internally as 8 32-bit words.

Definition at line 39 of file sha256.h.

Referenced by MHD_SHA256_finish(), and sha256_transform().

SHA256_DIGEST_STRING_SIZE

#define SHA256_DIGEST_STRING_SIZE   ((SHA256_DIGEST_SIZE) * 2 + 1)

Size of SHA-256 digest string in chars including termination NUL

Definition at line 60 of file sha256.h.

SHA256_WORD_SIZE_BITS

#define SHA256_WORD_SIZE_BITS   32

Number of bits in single SHA-256 word

Definition at line 44 of file sha256.h.

Function Documentation

MHD_SHA256_finish()

void MHD_SHA256_finish	(	struct Sha256Ctx *	ctx,
		uint8_t	digest[SHA256_DIGEST_SIZE] )

Finalise SHA256 calculation, return digest.

Parameters

	ctx	must be a struct Sha256Ctx *
[out]	digest	set to the hash, must be SHA256_DIGEST_SIZE bytes

Finalise SHA256 calculation, return digest.

Parameters

	ctx_	must be a struct Sha256Ctx *
[out]	digest	set to the hash, must be SHA256_DIGEST_SIZE bytes

< Number of processed bits

< Number of bytes in buffer

Definition at line 473 of file sha256.c.

References _MHD_PUT_32BIT_BE, _MHD_PUT_64BIT_BE_SAFE(), _MHD_UINT32_ALIGN, Sha256Ctx::buffer, Sha256Ctx::count, Sha256Ctx::H, SHA256_BLOCK_SIZE, SHA256_BLOCK_SIZE_WORDS, SHA256_BYTES_IN_WORD, SHA256_DIGEST_SIZE, SHA256_DIGEST_SIZE_WORDS, SHA256_SIZE_OF_LEN_ADD, and sha256_transform().

Referenced by digest_calc_hash().

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MHD_SHA256_init()

void MHD_SHA256_init

(

struct Sha256Ctx *

ctx

)

Initialise structure for SHA256 calculation.

Parameters

ctx	must be a struct Sha256Ctx *

Definition at line 41 of file sha256.c.

References Sha256Ctx::count, and Sha256Ctx::H.

MHD_SHA256_update()

void MHD_SHA256_update	(	struct Sha256Ctx *	ctx,
		const uint8_t *	data,
		size_t	length )

Process portion of bytes.

Parameters

ctx	must be a struct Sha256Ctx *
data	bytes to add to hash
length	number of bytes in data

Process portion of bytes.

Parameters

ctx_	must be a struct Sha256Ctx *
data	bytes to add to hash
length	number of bytes in data

< Number of bytes in buffer

Definition at line 410 of file sha256.c.

References Sha256Ctx::buffer, Sha256Ctx::count, data, Sha256Ctx::H, mhd_assert, NULL, SHA256_BLOCK_SIZE, and sha256_transform().

Referenced by digest_update().

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