#include <nagra2.h>

Inheritance diagram for cN2Prov:

Public Member Functions
	cN2Prov (int Id, int Flags)
virtual	~cN2Prov ()
bool	MECM (unsigned char in15, int algo, const unsigned char ed, unsigned char cw)
void	SwapCW (unsigned char *cw)
virtual int	ProcessBx (unsigned char *data, int len, int pos)
virtual int	ProcessEx (unsigned char *data, int len, int pos)
virtual bool	PostProcAU (int id, unsigned char *data)
virtual int	RunEmu (unsigned char *data, int len, unsigned short load, unsigned short run, unsigned short stop, unsigned short fetch, int fetch_len)
virtual void	PostDecrypt (bool ecm)
bool	CanHandle (int Id)
bool	HasFlags (int Flags)
void	PrintCaps (int c)
Protected Member Functions
virtual bool	Algo (int algo, const unsigned char hd, unsigned char hw)
virtual void	DynamicHD (unsigned char hd, const unsigned char ed)
virtual bool	NeedsCwSwap (void)
void	ExpandInput (unsigned char *hw)
Protected Attributes
int	id
int	flags
int	seedSize
cIDEA	idea

Detailed Description

Definition at line 289 of file nagra2.h.

Constructor & Destructor Documentation

cN2Prov::cN2Prov	(	int	Id,
		int	Flags
	)

Definition at line 1020 of file nagra2.c.

References flags, and seedSize.

{
  keyValid=false; id=Id|0x100; flags=Flags; seedSize=5;
}

virtual cN2Prov::~cN2Prov ( ) [inline, virtual]

Definition at line 303 of file nagra2.h.

{}

Member Function Documentation

virtual bool cN2Prov::Algo	(	int	algo,
		const unsigned char *	hd,
		unsigned char *	hw
	)		`[inline, protected, virtual]`

Reimplemented in cN2Prov0101, and cN2Prov0501.

Definition at line 297 of file nagra2.h.

Referenced by MECM().

{ return false; }

bool cN2Prov::CanHandle ( int Id ) [inline]

Definition at line 311 of file nagra2.h.

References MATCH_ID.

Referenced by Emm(), cSystemNagra2::ProcessECM(), and cSystemNagra2::ProcessEMM().

{ return MATCH_ID(Id,id); }

virtual void cN2Prov::DynamicHD	(	unsigned char *	hd,
		const unsigned char *	ed
	)		`[inline, protected, virtual]`

Reimplemented in cN2Prov0101.

Definition at line 298 of file nagra2.h.

Referenced by MECM().

{}

void cN2Prov::ExpandInput ( unsigned char * hw ) [protected]

Definition at line 1035 of file nagra2.c.

References cIDEA::Encrypt(), i, idea, cIDEA::SetEncKey(), and xxor.

Referenced by cN2Prov0501::Algo(), and cN2Prov0101::Algo().

{
  hw[0]^=(0xDE +(0xDE<<1)) & 0xFF;
  hw[1]^=(hw[0]+(0xDE<<1)) & 0xFF;
  for(int i=2; i<128; i++) hw[i]^=hw[i-2]+hw[i-1];
  IdeaKS ks;
  idea.SetEncKey((unsigned char *)"NagraVision S.A.",&ks);
  unsigned char buf[8];
  memset(buf,0,8);
  for(int i=0; i<128; i+=8) {
    xxor(buf,8,buf,&hw[i]);
    idea.Encrypt(buf,8,buf,&ks,0);
    xxor(buf,8,buf,&hw[i]);
    memcpy(&hw[i],buf,8);
    }
}

bool cN2Prov::HasFlags ( int Flags ) [inline]

Definition at line 312 of file nagra2.h.

References flags.

Referenced by Ecm(), Emm(), PrintCaps(), cSystemNagra2::ProcessECM(), and cSystemNagra2::ProcessEMM().

{ return (flags&Flags)==Flags; }

bool cN2Prov::MECM	(	unsigned char	in15,
		int	algo,
		const unsigned char *	ed,
		unsigned char *	cw
	)

Definition at line 1052 of file nagra2.c.

References Algo(), DynamicHD(), cIDEA::Encrypt(), i, idea, RotateBytes(), seedSize, and cIDEA::SetEncKey().

Referenced by Ecm(), and cSystemNagra2::ProcessECM().

{
  unsigned char hd[32], hw[128+64], buf[20];
  hd[0]=in15&0x7F;
  hd[1]=cw[14];
  hd[2]=cw[15];
  hd[3]=cw[6];
  hd[4]=cw[7];
  DynamicHD(hd,ed);

  if(keyValid && !memcmp(seed,hd,seedSize)) {   // key cached
    memcpy(buf,cwkey,8);
    }
  else {                                // key not cached
    memset(hw,0,sizeof(hw));
    if(!Algo(algo,hd,hw)) return false;
    memcpy(&hw[128],hw,64);
    RotateBytes(&hw[64],128);
    SHA1(&hw[64],128,buf);
    RotateBytes(buf,20);

    memcpy(seed,hd,seedSize);
    memcpy(cwkey,buf,8);
    keyValid=true;
    }  

  memcpy(&buf[8],buf,8);
  IdeaKS ks;
  idea.SetEncKey(buf,&ks);
  memcpy(&buf[0],&cw[8],6);
  memcpy(&buf[6],&cw[0],6);
  idea.Encrypt(&buf[4],8,&buf[4],&ks,0);
  idea.Encrypt(buf,8,buf,&ks,0);

  memcpy(&cw[ 0],&buf[6],3);
  memcpy(&cw[ 4],&buf[9],3);
  memcpy(&cw[ 8],&buf[0],3);
  memcpy(&cw[12],&buf[3],3);
  for(int i=0; i<16; i+=4) cw[i+3]=cw[i]+cw[i+1]+cw[i+2];
  return true;
}

virtual bool cN2Prov::NeedsCwSwap ( void ) [inline, protected, virtual]

Reimplemented in cN2Prov0501.

Definition at line 299 of file nagra2.h.

Referenced by SwapCW().

{ return false; }

virtual void cN2Prov::PostDecrypt ( bool ecm ) [inline, virtual]

Reimplemented in cN2Prov0101, and cN2Prov0501.

Definition at line 310 of file nagra2.h.

Referenced by Ecm(), Emm(), cSystemNagra2::ProcessECM(), and cSystemNagra2::ProcessEMM().

{}

virtual bool cN2Prov::PostProcAU	(	int	id,
		unsigned char *	data
	)		`[inline, virtual]`

Reimplemented in cN2Prov0101, and cN2Prov4101.

Definition at line 308 of file nagra2.h.

Referenced by Emm(), and cSystemNagra2::ProcessEMM().

{ return true; }

void cN2Prov::PrintCaps ( int c )

Definition at line 1025 of file nagra2.c.

References HasFlags(), N2FLAG_Bx, N2FLAG_Ex, N2FLAG_INV, N2FLAG_MECM, N2FLAG_POSTAU, and PRINTF.

Referenced by Ecm(), Emm(), cSystemNagra2::ProcessECM(), and cSystemNagra2::ProcessEMM().

{
  PRINTF(c,"provider %04x capabilities%s%s%s%s%s",id,
           HasFlags(N2FLAG_MECM)    ?" MECM":"",
           HasFlags(N2FLAG_Bx)      ?" Bx":"",
           HasFlags(N2FLAG_Ex)      ?" Ex":"",
           HasFlags(N2FLAG_POSTAU)  ?" POSTPROCAU":"",
           HasFlags(N2FLAG_INV)     ?" INVCW":"");
}

virtual int cN2Prov::ProcessBx	(	unsigned char *	data,
		int	len,
		int	pos
	)		`[inline, virtual]`

Reimplemented in cN2Prov0101, cN2Prov0501, and cN2Prov4101.

Definition at line 306 of file nagra2.h.

Referenced by Emm(), and cSystemNagra2::ProcessEMM().

{ return -1; }

virtual int cN2Prov::ProcessEx	(	unsigned char *	data,
		int	len,
		int	pos
	)		`[inline, virtual]`

Reimplemented in cN2Prov0101.

Definition at line 307 of file nagra2.h.

Referenced by Emm(), and cSystemNagra2::ProcessEMM().

{ return -1; }

virtual int cN2Prov::RunEmu	(	unsigned char *	data,
		int	len,
		unsigned short	load,
		unsigned short	run,
		unsigned short	stop,
		unsigned short	fetch,
		int	fetch_len
	)		`[inline, virtual]`

Reimplemented in cN2Prov0101, and cN2Prov0501.

Definition at line 309 of file nagra2.h.

Referenced by main().

{ return -1; }

void cN2Prov::SwapCW ( unsigned char * cw )

Definition at line 1094 of file nagra2.c.

References NeedsCwSwap().

Referenced by Ecm(), and cSystemNagra2::ProcessECM().

{
  if(NeedsCwSwap()) {
    unsigned char tt[8];
    memcpy(&tt[0],&cw[0],8);
    memcpy(&cw[0],&cw[8],8);
    memcpy(&cw[8],&tt[0],8);
    }
}

Member Data Documentation

int cN2Prov::flags [protected]

Definition at line 294 of file nagra2.h.

Referenced by cN2Prov(), and HasFlags().

int cN2Prov::id [protected]

Definition at line 294 of file nagra2.h.

cIDEA cN2Prov::idea [protected]

Definition at line 295 of file nagra2.h.

Referenced by cN2Prov0101::Algo(), ExpandInput(), and MECM().

int cN2Prov::seedSize [protected]

Definition at line 294 of file nagra2.h.

Referenced by cN2Prov0101::Algo(), cN2Prov(), cN2Prov0101::cN2Prov0101(), and MECM().

The documentation for this class was generated from the following files:

sc/PLUGINS/src/sc-src/systems/nagra/nagra2.h
sc/PLUGINS/src/sc-src/systems/nagra/nagra2.c

cN2Prov Class Reference

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation