cNagra Class Reference

#include <nagra.h>

Inheritance diagram for cNagra:

List of all members.

Public Member Functions
	cNagra (void)
virtual	~cNagra ()
Protected Member Functions
virtual void	CreatePQ (const unsigned char *pk, BIGNUM *p, BIGNUM *q)=0
void	ExpandPQ (BIGNUM *p, BIGNUM *q, const unsigned char *data, BIGNUM *e, BIGNUM *m)
void	CreateRSAPair (const unsigned char *key, const unsigned char *data, BIGNUM *e, BIGNUM *m)
Protected Attributes
cRSA	rsa
cBN	pubExp

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Detailed Description

Definition at line 48 of file nagra.h.

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Constructor & Destructor Documentation

cNagra::cNagra

(

void

)

Definition at line 202 of file nagra.c.

References pubExp.

{
  BN_set_word(pubExp,3);
}

virtual cNagra::~cNagra

(

)

[inline, virtual]

Definition at line 58 of file nagra.h.

{};

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Member Function Documentation

virtual void cNagra::CreatePQ	(	const unsigned char *	pk,
		BIGNUM *	p,
		BIGNUM *	q
	)		[protected, pure virtual]

Implemented in cNagra1, and cNagra2.

Referenced by CreateRSAPair().

void cNagra::CreateRSAPair	(	const unsigned char *	key,
		const unsigned char *	data,
		BIGNUM *	e,
		BIGNUM *	m
	)		[protected]

Definition at line 207 of file nagra.c.

References CreatePQ(), and ExpandPQ().

Referenced by cNagra2::DecryptEMM(), cTestNagra::Process(), cSystemNagra::ProcessECM(), and cSystemNagra::ProcessEMM().

{
  // Calculate P and Q from data
  cBN p,q;
  CreatePQ(key,p,q);
  ExpandPQ(p,q,data,e,m);
}

void cNagra::ExpandPQ	(	BIGNUM *	p,
		BIGNUM *	q,
		const unsigned char *	data,
		BIGNUM *	e,
		BIGNUM *	m
	)		[protected]

Definition at line 215 of file nagra.c.

Referenced by CreateRSAPair().

{
  // Calculate N=P*Q (modulus)
  cBNctx ctx;
  BN_mul(m,p,q,ctx);
  if(data) BN_bin2bn(data,64,e); // set provided data as E1
  else {                         // else calculate the 'official' one
    // E = ( ( ( (P-1) * (Q-1) * 2) + 1) / 3)
    BN_sub_word(p,1);
    BN_sub_word(q,1);
    BN_mul(e,p,q,ctx);
    BN_mul_word(e,2);
    BN_add_word(e,1);
    BN_div_word(e,3);
    }
}

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Member Data Documentation

cBN cNagra::pubExp [protected]

Definition at line 51 of file nagra.h.

Referenced by cNagra(), cNagra2::DecryptECM(), cNagra1::DecryptECM(), cNagra2::DecryptEMM(), cNagra1::DecryptEMM(), and cSystemNagra::ProcessECM().

cRSA cNagra::rsa [protected]

Definition at line 50 of file nagra.h.

Referenced by cNagra2::DecryptECM(), cNagra1::DecryptECM(), cNagra2::DecryptEMM(), and cNagra1::DecryptEMM().

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

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