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

Macros
#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. More...
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. More...
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. More...
int	ff_rtmpe_update_keystream (URLContext *h)
	Update the keystream and set RC4 keys for encryption. More...
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.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(RTMPEContext, x)

Definition at line 312 of file rtmpcrypt.c.

#define DEC   AV_OPT_FLAG_DECODING_PARAM

Definition at line 313 of file rtmpcrypt.c.

Function Documentation

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_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().

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().

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_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 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

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().

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 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.

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.