cBN Class Reference

#include <crypto-bn.h>

List of all members.

Public Member Functions
	cBN (void)
	~cBN ()
	operator BIGNUM * ()
BIGNUM *	operator-> ()
BIGNUM *	BN (void)
bool	Get (const unsigned char *in, int n)
bool	GetLE (const unsigned char *in, int n)
int	Put (unsigned char *out, int n) const
int	PutLE (unsigned char *out, int n) const

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Detailed Description

Definition at line 32 of file crypto-bn.h.

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Constructor & Destructor Documentation

cBN::cBN

(

void

)

[inline]

Definition at line 36 of file crypto-bn.h.

{ BN_init(&big); }

cBN::~cBN

(

)

[inline]

Definition at line 37 of file crypto-bn.h.

{ BN_free(&big); }

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Member Function Documentation

BIGNUM* cBN::BN

(

void

)

[inline]

Definition at line 40 of file crypto-bn.h.

{ return &big; }

bool cBN::Get	(	const unsigned char *	in,
		int	n
	)

Definition at line 52 of file crypto.c.

Referenced by cSmartCardDataNagra::Parse(), and cBNKey::SetBinKey().

{
  return BN_bin2bn(in,n,&big)!=0;
}

bool cBN::GetLE	(	const unsigned char *	in,
		int	n
	)

Definition at line 74 of file crypto.c.

References AUTOMEM, and RotateBytes().

Referenced by cMapReg::GetLE(), cMap4101::Map(), cMap0101::Map(), cSystemNagra2::ProcessEMM(), and cBNKey::SetBinKey().

{
  unsigned char *tmp=AUTOMEM(n);
  RotateBytes(tmp,in,n);
  return BN_bin2bn(tmp,n,&big)!=0;
}

cBN::operator BIGNUM *

(

)

[inline]

Definition at line 38 of file crypto-bn.h.

{ return &big; }

BIGNUM* cBN::operator->

(

)

[inline]

Definition at line 39 of file crypto-bn.h.

{ return &big; }

int cBN::Put	(	unsigned char *	out,
		int	n
	)		const

Definition at line 57 of file crypto.c.

References AUTOMEM.

Referenced by cCamCryptNagra::DecryptDT08(), cCamCryptNagra::MakeSessionKey(), cBNKey::Print(), PutLE(), and cCamCryptNagra::SetCardData().

{
  int s=BN_num_bytes(&big);
  if(s>n) {
    unsigned char *buff=AUTOMEM(s);
    BN_bn2bin(&big,buff);
    memcpy(out,buff+s-n,n);
    }
  else if(s<n) {
    int l=n-s;
    memset(out,0,l);
    BN_bn2bin(&big,out+l);
    }
  else BN_bn2bin(&big,out);
  return s;
}

int cBN::PutLE	(	unsigned char *	out,
		int	n
	)		const

Definition at line 81 of file crypto.c.

References Put(), and RotateBytes().

Referenced by cMap4101::Map(), cMap0101::Map(), cBNKey::Print(), cSystemNagra2::ProcessEMM(), and cMapReg::PutLE().

{
  int s=Put(out,n);
  RotateBytes(out,n);
  return s;
}

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

• sc/PLUGINS/src/sc-src/crypto-bn.h
• sc/PLUGINS/src/sc-src/crypto.c