libavformat/rtmpcrypt.c File Reference

RTMPE protocol. More...

#include "libavutil/blowfish.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/rc4.h"
#include "libavutil/xtea.h"
#include "internal.h"
#include "rtmp.h"
#include "rtmpdh.h"
#include "rtmpcrypt.h"
#include "url.h"

Go to the source code of this file.

Data Structures
struct	RTMPEContext
Defines
#define	OFFSET(x)   offsetof(RTMPEContext, x)
#define	DEC   AV_OPT_FLAG_DECODING_PARAM
Functions
int	ff_rtmpe_gen_pub_key (URLContext *h, uint8_t *buf)
	Initialize the Diffie-Hellmann context and generate the public key.
int	ff_rtmpe_compute_secret_key (URLContext *h, const uint8_t *serverdata, const uint8_t *clientdata, int type)
	Compute the shared secret key and initialize the RC4 encryption.
static void	rtmpe8_sig (const uint8_t *in, uint8_t *out, int key_id)
static void	rtmpe9_sig (const uint8_t *in, uint8_t *out, int key_id)
void	ff_rtmpe_encrypt_sig (URLContext *h, uint8_t *sig, const uint8_t *digest, int type)
	Encrypt the signature.
int	ff_rtmpe_update_keystream (URLContext *h)
	Update the keystream and set RC4 keys for encryption.
static int	rtmpe_close (URLContext *h)
static int	rtmpe_open (URLContext *h, const char *uri, int flags)
static int	rtmpe_read (URLContext *h, uint8_t *buf, int size)
static int	rtmpe_write (URLContext *h, const uint8_t *buf, int size)
Variables
static const uint8_t	rtmpe8_keys [16][16]
static const uint8_t	rtmpe9_keys [16][24]
static const AVOption	ffrtmpcrypt_options []
static const AVClass	ffrtmpcrypt_class
URLProtocol	ff_ffrtmpcrypt_protocol

---

Detailed Description

RTMPE protocol.

Definition in file rtmpcrypt.c.

---

Define Documentation

#define DEC   AV_OPT_FLAG_DECODING_PARAM

Definition at line 313 of file rtmpcrypt.c.

#define OFFSET

(

x

)

offsetof(RTMPEContext, x)

Definition at line 312 of file rtmpcrypt.c.

---

Function Documentation

int ff_rtmpe_compute_secret_key	(	URLContext *	h,
		const uint8_t *	serverdata,
		const uint8_t *	clientdata,
		int	type
	)

Compute the shared secret key and initialize the RC4 encryption.

Parameters:

	h	an URLContext
	serverdata	server data (1536 bytes)
	clientdata	client data (1536 bytes)
	type	the position of the server digest

Returns:

zero on success, negative value otherwise

Definition at line 145 of file rtmpcrypt.c.

Referenced by rtmp_handshake().

void ff_rtmpe_encrypt_sig	(	URLContext *	h,
		uint8_t *	signature,
		const uint8_t *	digest,
		int	type
	)

Encrypt the signature.

Parameters:

	h	an URLContext
	signature	the signature to encrypt
	digest	the digest used for finding the encryption key
	type	type of encryption (8 for XTEA, 9 for Blowfish)

Definition at line 207 of file rtmpcrypt.c.

Referenced by rtmp_handshake().

int ff_rtmpe_gen_pub_key	(	URLContext *	h,
		uint8_t *	buf
	)

Initialize the Diffie-Hellmann context and generate the public key.

Parameters:

	h	an URLContext
	buf	handshake data (1536 bytes)

Returns:

zero on success, negative value otherwise

Definition at line 122 of file rtmpcrypt.c.

Referenced by rtmp_handshake().

int ff_rtmpe_update_keystream

(

URLContext *

h

)

Update the keystream and set RC4 keys for encryption.

Parameters:

h

an URLContext

Returns:

zero on success, negative value otherwise

Definition at line 223 of file rtmpcrypt.c.

Referenced by rtmp_handshake().

static void rtmpe8_sig	(	const uint8_t *	in,
		uint8_t *	out,
		int	key_id
	)			[static]

Definition at line 184 of file rtmpcrypt.c.

Referenced by ff_rtmpe_encrypt_sig().

static void rtmpe9_sig	(	const uint8_t *	in,
		uint8_t *	out,
		int	key_id
	)			[static]

Definition at line 192 of file rtmpcrypt.c.

Referenced by ff_rtmpe_encrypt_sig().

static int rtmpe_close

(

URLContext *

h

)

[static]

Definition at line 238 of file rtmpcrypt.c.

Referenced by rtmpe_open().

static int rtmpe_open	(	URLContext *	h,
		const char *	uri,
		int	flags
	)			[static]

Definition at line 248 of file rtmpcrypt.c.

static int rtmpe_read	(	URLContext *	h,
		uint8_t *	buf,
		int	size
	)			[static]

Definition at line 276 of file rtmpcrypt.c.

static int rtmpe_write	(	URLContext *	h,
		const uint8_t *	buf,
		int	size
	)			[static]

Definition at line 296 of file rtmpcrypt.c.

---

Variable Documentation

URLProtocol ff_ffrtmpcrypt_protocol

Initial value:

 {
    .name            = "ffrtmpcrypt",
    .url_open        = rtmpe_open,
    .url_read        = rtmpe_read,
    .url_write       = rtmpe_write,
    .url_close       = rtmpe_close,
    .priv_data_size  = sizeof(RTMPEContext),
    .flags           = URL_PROTOCOL_FLAG_NETWORK,
    .priv_data_class = &ffrtmpcrypt_class,
}

Definition at line 327 of file rtmpcrypt.c.

const AVClass ffrtmpcrypt_class [static]

Initial value:

 {
    .class_name = "ffrtmpcrypt",
    .item_name  = av_default_item_name,
    .option     = ffrtmpcrypt_options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 320 of file rtmpcrypt.c.

const AVOption ffrtmpcrypt_options[] [static]

Initial value:

 {
    {"ffrtmpcrypt_tunneling", "Use a HTTP tunneling connection (RTMPTE).", OFFSET(tunneling), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC},
    { NULL },
}

Definition at line 315 of file rtmpcrypt.c.

const uint8_t rtmpe8_keys[16][16] [static]

Definition at line 52 of file rtmpcrypt.c.

Referenced by rtmpe8_sig().

const uint8_t rtmpe9_keys[16][24] [static]

Definition at line 87 of file rtmpcrypt.c.

Referenced by rtmpe9_sig().