cNagraDES Class Reference

Inheritance diagram for cNagraDES:

List of all members.

Protected Member Functions
void	Decrypt (const unsigned char *data, const unsigned char *key, unsigned char *out, bool desmod=false)
void	Crypt (const unsigned char *data, const unsigned char *key, unsigned char *out)
bool	SigCheck (const unsigned char *block, const unsigned char *sig, const unsigned char *vkey, const int rounds)
void	Decrypt (const unsigned char *data, const unsigned char *key, unsigned char *out, bool desmod=false)
void	Crypt (const unsigned char *data, const unsigned char *key, unsigned char *out)
bool	SigCheck (const unsigned char *block, const unsigned char *sig, const unsigned char *vkey, const int rounds)

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Detailed Description

Definition at line 525 of file nagra1.c.

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Member Function Documentation

void cNagraDES::Crypt	(	const unsigned char *	data,
		const unsigned char *	key,
		unsigned char *	out
	)		[protected]

Definition at line 545 of file nagra1.c.

References cDes::Des(), NAGRA_DES_ENCR, and RotateBytes().

Referenced by SigCheck().

{
  unsigned char cardkey[8];
  memcpy(cardkey,key,8);
  RotateBytes(cardkey,8);
  memcpy(out,data,8);
  RotateBytes(out,8);
  des.Des(out,cardkey,NAGRA_DES_ENCR);
  RotateBytes(out,8);
}

void cNagraDES::Crypt	(	const unsigned char *	data,
		const unsigned char *	key,
		unsigned char *	out
	)		[protected]

void cNagraDES::Decrypt	(	const unsigned char *	data,
		const unsigned char *	key,
		unsigned char *	out,
		bool	desmod = false
	)		[protected]

Definition at line 534 of file nagra1.c.

References cDes::Des(), NAGRA_DES_DECR, and RotateBytes().

Referenced by cNagra1::CreatePQ(), and cSystemNagra::ProcessECM().

{
  unsigned char cardkey[8];
  memcpy(cardkey,key,8);
  RotateBytes(cardkey,8);
  memcpy(out,data,8);
  if(!desmod) RotateBytes(out,8);
  des.Des(out,cardkey,NAGRA_DES_DECR);
  if(!desmod) RotateBytes(out,8);
}

void cNagraDES::Decrypt	(	const unsigned char *	data,
		const unsigned char *	key,
		unsigned char *	out,
		bool	desmod = false
	)		[protected]

bool cNagraDES::SigCheck	(	const unsigned char *	block,
		const unsigned char *	sig,
		const unsigned char *	vkey,
		const int	rounds
	)		[protected]

Definition at line 556 of file nagra1.c.

References Crypt(), hash, j, and xxor.

Referenced by cNagra1::DecryptECM(), cNagra1::DecryptEMM(), and cSystemNagra::ProcessECM().

{
  unsigned char hash[8];
  memcpy(hash,vkey,8);
  for(int j=0; j<rounds; j++) {
    unsigned char cr[8];
    Crypt(block+j*8,hash,cr);
    xxor(hash,8,cr,&block[j*8]);
    }
  return (0==memcmp(hash,sig,8));
}

bool cNagraDES::SigCheck	(	const unsigned char *	block,
		const unsigned char *	sig,
		const unsigned char *	vkey,
		const int	rounds
	)		[protected]

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

• contrib/sasc-ng/sc/PLUGINS/src/sc-src/systems/nagra/nagra1.c
• systems/nagra/nagra1.c