sha256.h File Reference

Go to the source code of this file.

#include "utildev.h"

Detailed Description

SHA256 hash function support.

This file is based on Brad Conte's basic implementations of cryptography algorithms...

‍https://github.com/B-Con/crypto-algorithms

... and alterations to the transform function were based on Igor Pavlov's SHA256 implementation...

‍https://github.com/jb55/sha256.c

... both of which were released into the Public Domain.

Copyright

This file is released into the Public Domain under the Creative Commons Zero v1.0 Universal license.

Macros
#define	SHA256LEN   32
	SHA256 message digest length, in bytes.

Data Structures
struct	SHA256_CTX

Functions
void	sha256_init (SHA256_CTX *ctx)
	Initialize a SHA256 context. More...
void	sha256_update (SHA256_CTX *ctx, const void *in, size_t inlen)
	Add inlen bytes from in to a SHA256 context for hashing. More...
void	sha256_final (SHA256_CTX *ctx, void *out)
	Finalize a SHA256 message digest. More...
void	sha256 (const void *in, size_t inlen, void *out)
	Convenient all-in-one SHA256 computation. More...

Function Documentation

sha256()

void sha256	(	const void *	in,
		size_t	inlen,
		void *	out
	)

Convenient all-in-one SHA256 computation.

Performs sha256_init(), sha256_update() and sha256_final(), and places the resulting hash in out.

Parameters

in	Pointer to data to hash
inlen	Length of in data, in bytes
out	Pointer to location to place the message digest

sha256_final()

void sha256_final	(	SHA256_CTX *	ctx,
		void *	out
	)

Finalize a SHA256 message digest.

Generate the SHA256 message digest and place in out.

Parameters

ctx	Pointer to SHA256 context
out	Pointer to location to place the message digest

sha256_init()

void sha256_init

(

SHA256_CTX *

ctx

)

Initialize a SHA256 context.

Parameters

ctx	Pointer to SHA256 context

sha256_update()

void sha256_update	(	SHA256_CTX *	ctx,
		const void *	in,
		size_t	inlen
	)

Add inlen bytes from in to a SHA256 context for hashing.

Parameters

ctx	Pointer to SHA256 context
in	Pointer to data to hash
inlen	Length of in data, in bytes