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hash.h File Reference

Hash (message digest) algorithm support. More...

#include <cyfer/cyfer.h>

Go to the source code of this file.

Data Structures
struct	CYFER_Hash_t
	A structure describing supported hash algorithms. More...
Defines
#define	CYFER_HASH_NONE   0
#define	CYFER_HASH_MD4   1
#define	CYFER_HASH_MD5   2
#define	CYFER_HASH_SHA1   3
#define	CYFER_HASH_RMD160   4
#define	CYFER_HASH_ADLER32   5
#define	CYFER_HASH_SNEFRU   6
#define	CYFER_HASH_CRC32   7
#define	CYFER_HASH_MD2   8
#define	CYFER_HASH_SHA256   9
Typedefs
typedef void	CYFER_HASH_CTX
	Hash algorithm context.
Functions
CYFER_Hash_t *	CYFER_Hash_Get_Supported (void)
	Returns a list of supported hash algorithms.
int	CYFER_Hash_Select (const char *name, size_t *length)
	Selects hash algorithm to use.
CYFER_HASH_CTX *	CYFER_Hash_Init (int type)
	Creates and initializes algorithm context.
void	CYFER_Hash_Update (CYFER_HASH_CTX *ctx, const unsigned char *data, size_t len)
	Processes a chunk of data.
void	CYFER_Hash_Finish (CYFER_HASH_CTX *ctx, unsigned char *md)
	Finalizes the algorithm and returns the hash value.
int	CYFER_Hash (int type, const unsigned char *data, size_t len, unsigned char *md)
	An utility function to calculate hash of one chunk of data.

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Detailed Description

Hash (message digest) algorithm support.

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Define Documentation

#define CYFER_HASH_ADLER32   5

#define CYFER_HASH_CRC32   7

#define CYFER_HASH_MD2   8

#define CYFER_HASH_MD4   1

#define CYFER_HASH_MD5   2

#define CYFER_HASH_NONE   0

#define CYFER_HASH_RMD160   4

#define CYFER_HASH_SHA1   3

#define CYFER_HASH_SHA256   9

#define CYFER_HASH_SNEFRU   6

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Typedef Documentation

typedef void CYFER_HASH_CTX

Hash algorithm context.

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Function Documentation

int CYFER_Hash (  int    type, const unsigned char *    data, size_t    len, unsigned char *    md )

An utility function to calculate hash of one chunk of data. Parameters: type  An integer representing the hash algorithm to use data  Input data len  Input data length (in bytes) md  [output] A buffer for the resulting hash value (must be big enough to hold the value)

void CYFER_Hash_Finish (  CYFER_HASH_CTX *    ctx, unsigned char *    md )

Finalizes the algorithm and returns the hash value. Note: The function also destroys and frees the hash context Parameters: ctx  Algorithm context md  [output] A buffer for hash value (must be big enough to hold the value)

CYFER_Hash_t* CYFER_Hash_Get_Supported (  void    )

Returns a list of supported hash algorithms.

CYFER_HASH_CTX* CYFER_Hash_Init (  int    type )

Creates and initializes algorithm context. Parameters: type  An integer representing hash algorithm to use Returns: An initialized hash context, or NULL in case of error

int CYFER_Hash_Select (  const char *    name, size_t *    length )

Selects hash algorithm to use. Parameters: name  Hash algorithm name length  [output] Length of hash value (in bytes) Returns: An integer representing the selected algorithm

void CYFER_Hash_Update (  CYFER_HASH_CTX *    ctx, const unsigned char *    data, size_t    len )

Processes a chunk of data. Parameters: ctx  Algorithm context data  Input to the hash algorithm len  Length of input data (in bytes)

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