hash.c File Reference

#include <stdint.h>
#include "hash.h"
#include "adler32.h"
#include "crc.h"
#include "md5.h"
#include "murmur3.h"
#include "ripemd.h"
#include "sha.h"
#include "sha512.h"
#include "avstring.h"
#include "base64.h"
#include "error.h"
#include "intreadwrite.h"
#include "mem.h"

Go to the source code of this file.

Data Structures
struct	AVHashContext

Enumerations
enum	hashtype {   MD5, MURMUR3, RIPEMD128, RIPEMD160,   RIPEMD256, RIPEMD320, SHA160, SHA224,   SHA256, SHA512_224, SHA512_256, SHA384,   SHA512, CRC32, ADLER32, NUM_HASHES }

Functions
const char *	av_hash_names (int i)
	Get the names of available hash algorithms.
const char *	av_hash_get_name (const AVHashContext *ctx)
int	av_hash_get_size (const AVHashContext *ctx)
int	av_hash_alloc (AVHashContext **ctx, const char *name)
	Allocate a hash context for the algorithm specified by name.
void	av_hash_init (AVHashContext *ctx)
	Initialize or reset a hash context.
void	av_hash_update (AVHashContext *ctx, const uint8_t *src, int len)
	Update a hash context with additional data.
void	av_hash_final (AVHashContext *ctx, uint8_t *dst)
	Finalize a hash context and compute the actual hash value.
void	av_hash_final_bin (struct AVHashContext *ctx, uint8_t *dst, int size)
	Finalize a hash context and compute the actual hash value.
void	av_hash_final_hex (struct AVHashContext *ctx, uint8_t *dst, int size)
	Finalize a hash context and compute the actual hash value as a hex string.
void	av_hash_final_b64 (struct AVHashContext *ctx, uint8_t *dst, int size)
	Finalize a hash context and compute the actual hash value as a base64 string.
void	av_hash_freep (AVHashContext **ctx)
	Free hash context.

Variables
struct {
const char *   name
int   size
}	hashdesc []

Enumeration Type Documentation

enum hashtype

Enumerator:

MD5
MURMUR3
RIPEMD128
RIPEMD160
RIPEMD256
RIPEMD320
SHA160
SHA224
SHA256
SHA512_224
SHA512_256
SHA384
SHA512
CRC32
ADLER32
NUM_HASHES

Definition at line 37 of file hash.c.

Function Documentation

const char* av_hash_names

(

int

i

)

Get the names of available hash algorithms.

This function can be used to enumerate the algorithms.

Parameters

i	index of the hash algorithm, starting from 0

Returns

a pointer to a static string or NULL if i is out of range

Definition at line 84 of file hash.c.

Referenced by usage().

const char* av_hash_get_name

(

const AVHashContext *

ctx

)

Definition at line 90 of file hash.c.

Referenced by check(), and finish().

int av_hash_get_size

(

const AVHashContext *

ctx

)

Definition at line 95 of file hash.c.

Referenced by av_hash_final_b64(), av_hash_final_bin(), av_hash_final_hex(), and md5_finish().

int av_hash_alloc	(	struct AVHashContext **	ctx,
		const char *	name
	)

Allocate a hash context for the algorithm specified by name.

Returns

>= 0 for success, a negative error code for failure

Note

The context is not initialized, you must call av_hash_init().

Definition at line 100 of file hash.c.

Referenced by main().

void av_hash_init

(

AVHashContext *

ctx

)

Initialize or reset a hash context.

Definition at line 137 of file hash.c.

Referenced by check().

void av_hash_update	(	AVHashContext *	ctx,
		const uint8_t *	src,
		int	len
	)

Update a hash context with additional data.

Definition at line 158 of file hash.c.

Referenced by check().

void av_hash_final	(	AVHashContext *	ctx,
		uint8_t *	dst
	)

Finalize a hash context and compute the actual hash value.

Definition at line 179 of file hash.c.

Referenced by av_hash_final_b64(), av_hash_final_bin(), av_hash_final_hex(), and md5_finish().

void av_hash_final_bin	(	struct AVHashContext *	ctx,
		uint8_t *	dst,
		int	size
	)

Finalize a hash context and compute the actual hash value.

If size is smaller than the hash size, the hash is truncated; if size is larger, the buffer is padded with 0.

Definition at line 200 of file hash.c.

void av_hash_final_hex	(	struct AVHashContext *	ctx,
		uint8_t *	dst,
		int	size
	)

Finalize a hash context and compute the actual hash value as a hex string.

The string is always 0-terminated. If size is smaller than 2 * hash_size + 1, the hex string is truncated.

Definition at line 211 of file hash.c.

Referenced by finish().

void av_hash_final_b64	(	struct AVHashContext *	ctx,
		uint8_t *	dst,
		int	size
	)

Finalize a hash context and compute the actual hash value as a base64 string.

The string is always 0-terminated. If size is smaller than AV_BASE64_SIZE(hash_size), the base64 string is truncated.

Definition at line 221 of file hash.c.

Referenced by finish().

void av_hash_freep

(

AVHashContext **

ctx

)

Free hash context.

Definition at line 234 of file hash.c.

Referenced by main().

Variable Documentation

const char* name

Definition at line 64 of file hash.c.

int size

Definition at line 65 of file hash.c.

struct { ... } hashdesc[]

Initial value:

= {
    [MD5]     = {"MD5",     16},
    [MURMUR3] = {"murmur3", 16},
    [RIPEMD128] = {"RIPEMD128", 16},
    [RIPEMD160] = {"RIPEMD160", 20},
    [RIPEMD256] = {"RIPEMD256", 32},
    [RIPEMD320] = {"RIPEMD320", 40},
    [SHA160]  = {"SHA160",  20},
    [SHA224]  = {"SHA224",  28},
    [SHA256]  = {"SHA256",  32},
    [SHA512_224]  = {"SHA512/224",  28},
    [SHA512_256]  = {"SHA512/256",  32},
    [SHA384]  = {"SHA384",  48},
    [SHA512]  = {"SHA512",  64},
    [CRC32]   = {"CRC32",    4},
    [ADLER32] = {"adler32",  4},
}

Referenced by av_hash_alloc(), av_hash_get_name(), av_hash_get_size(), and av_hash_names().