rtmpdh.c File Reference

RTMP Diffie-Hellmann utilities. More...

#include <stdint.h>
#include <string.h>
#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/error.h"
#include "libavutil/mem.h"
#include "libavutil/random_seed.h"
#include "rtmpdh.h"

Go to the source code of this file.

Macros
#define	P1024
#define	Q1024
#define	MAX_BYTES   18000
#define	dh_new()   av_mallocz(sizeof(FF_DH))

Functions
static FFBigNum	dh_generate_key (FF_DH *dh)
static int	dh_compute_key (FF_DH *dh, FFBigNum pub_key_bn, uint32_t secret_key_len, uint8_t *secret_key)
void	ff_dh_free (FF_DH *dh)
	Free a Diffie-Hellmann context. More...
static int	dh_is_valid_public_key (FFBigNum y, FFBigNum p, FFBigNum q)
av_cold FF_DH *	ff_dh_init (int key_len)
	Initialize a Diffie-Hellmann context. More...
int	ff_dh_generate_public_key (FF_DH *dh)
	Generate a public key. More...
int	ff_dh_write_public_key (FF_DH *dh, uint8_t *pub_key, int pub_key_len)
	Write the public key into the given buffer. More...
int	ff_dh_compute_shared_secret_key (FF_DH *dh, const uint8_t *pub_key, int pub_key_len, uint8_t *secret_key, int secret_key_len)
	Compute the shared secret key from the private FF_DH value and the other party's public value. More...

Detailed Description

RTMP Diffie-Hellmann utilities.

Definition in file rtmpdh.c.

Macro Definition Documentation

#define P1024

Value:

"FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD1" \
    "29024E088A67CC74020BBEA63B139B22514A08798E3404DD" \
    "EF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245" \
    "E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7ED" \
    "EE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381" \
    "FFFFFFFFFFFFFFFF"

Definition at line 41 of file rtmpdh.c.

Referenced by ff_dh_init().

#define Q1024

Value:

"7FFFFFFFFFFFFFFFE487ED5110B4611A62633145C06E0E68" \
    "948127044533E63A0105DF531D89CD9128A5043CC71A026E" \
    "F7CA8CD9E69D218D98158536F92F8A1BA7F09AB6B6A8E122" \
    "F242DABB312F3F637A262174D31BF6B585FFAE5B7A035BF6" \
    "F71C35FDAD44CFD2D74F9208BE258FF324943328F67329C0" \
    "FFFFFFFFFFFFFFFF"

Definition at line 49 of file rtmpdh.c.

Referenced by ff_dh_compute_shared_secret_key(), and ff_dh_generate_public_key().

#define MAX_BYTES   18000

Definition at line 164 of file rtmpdh.c.

Referenced by dh_generate_key().

#define dh_new

(

)

av_mallocz(sizeof(FF_DH))

Definition at line 166 of file rtmpdh.c.

Referenced by ff_dh_init().

Function Documentation

static FFBigNum dh_generate_key ( FF_DH *  dh )

static

Definition at line 168 of file rtmpdh.c.

Referenced by ff_dh_generate_public_key().

static int dh_compute_key ( FF_DH *  dh, FFBigNum  pub_key_bn, uint32_t  secret_key_len, uint8_t *  secret_key  )

static

Definition at line 193 of file rtmpdh.c.

Referenced by ff_dh_compute_shared_secret_key().

void ff_dh_free

(

FF_DH *

dh

)

Free a Diffie-Hellmann context.

Parameters

dh	a Diffie-Hellmann context to free

Definition at line 214 of file rtmpdh.c.

Referenced by ff_dh_init(), rtmpe_close(), test_random_shared_secret(), and test_ref_data().

static int dh_is_valid_public_key ( FFBigNum  y, FFBigNum  p, FFBigNum  q  )

static

Definition at line 225 of file rtmpdh.c.

Referenced by ff_dh_compute_shared_secret_key(), and ff_dh_generate_public_key().

av_cold FF_DH* ff_dh_init

(

int

key_len

)

Initialize a Diffie-Hellmann context.

Parameters

key_len

length of the key

Returns

a new Diffie-Hellmann context on success, NULL otherwise

Definition at line 266 of file rtmpdh.c.

Referenced by ff_rtmpe_gen_pub_key(), test_random_shared_secret(), and test_ref_data().

int ff_dh_generate_public_key

(

FF_DH *

dh

)

Generate a public key.

Parameters

dh	a Diffie-Hellmann context

Returns

zero on success, negative value otherwise

Definition at line 293 of file rtmpdh.c.

Referenced by ff_rtmpe_gen_pub_key(), and test_random_shared_secret().

int ff_dh_write_public_key	(	FF_DH *	dh,
		uint8_t *	pub_key,
		int	pub_key_len
	)

Write the public key into the given buffer.

Parameters

dh	a Diffie-Hellmann context, containing the public key to write
pub_key	the buffer where the public key is written
pub_key_len	the length of the buffer

Returns

zero on success, negative value otherwise

Definition at line 319 of file rtmpdh.c.

Referenced by ff_rtmpe_gen_pub_key(), test_random_shared_secret(), and test_ref_data().

int ff_dh_compute_shared_secret_key	(	FF_DH *	dh,
		const uint8_t *	pub_key,
		int	pub_key_len,
		uint8_t *	secret_key,
		int	secret_key_len
	)

Compute the shared secret key from the private FF_DH value and the other party's public value.

Parameters

dh	a Diffie-Hellmann context, containing the private key
pub_key	the buffer containing the public key
pub_key_len	the length of the public key buffer
secret_key	the buffer where the secret key is written
secret_key_len	the length of the secret key buffer

Returns

length of the shared secret key on success, negative value otherwise

Definition at line 335 of file rtmpdh.c.

Referenced by ff_rtmpe_compute_secret_key(), test_random_shared_secret(), and test_ref_data().