cCamCrypt Class Reference

Inheritance diagram for cCamCrypt:

List of all members.

Public Member Functions
	cCamCrypt (void)
	cCamCrypt (void)
Protected Member Functions
void	CamCrypt (const unsigned char *key, unsigned char *data)
void	RevCamCrypt (const unsigned char *key, unsigned char *data)
bool	SetupCardFiles (unsigned char *data, int len, BIGNUM *exp, BIGNUM *mod)
void	PrepareCamMessage (unsigned char *plain)
bool	EncryptCamMessage (unsigned char *encrypted, const unsigned char *plain)
const unsigned char *	CamKey (const unsigned char *data)
const unsigned char *	HelperKey (const unsigned char *data)
void	CamCrypt (const unsigned char *key, unsigned char *data)
void	RevCamCrypt (const unsigned char *key, unsigned char *data)
bool	SetupCardFiles (unsigned char *data, int len, BIGNUM *exp, BIGNUM *mod)
void	PrepareCamMessage (unsigned char *plain)
bool	EncryptCamMessage (unsigned char *encrypted, const unsigned char *plain)
const unsigned char *	CamKey (const unsigned char *data)
const unsigned char *	HelperKey (const unsigned char *data)

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Detailed Description

Definition at line 105 of file sc-irdeto.c.

---

Constructor & Destructor Documentation

cCamCrypt::cCamCrypt

(

void

)

Definition at line 147 of file sc-irdeto.c.

{
  randomInit=false;
}

cCamCrypt::cCamCrypt

(

void

)

---

Member Function Documentation

void cCamCrypt::CamCrypt	(	const unsigned char *	key,
		unsigned char *	data
	)		[protected]

Definition at line 207 of file sc-irdeto.c.

References tmp1, and tmp2.

{
  unsigned char localKey[8];
  memcpy(localKey,key,sizeof(localKey));
  for(int idx1=0 ; idx1<7 ; idx1++) RotateLeft8Byte(localKey);
  for(int idx1=7 ; idx1>=0 ; idx1--) {
    for(int idx2=7 ; idx2>=0 ; idx2--) {
      const unsigned char tmp1=cryptTable[data[6] ^ localKey[idx2] ^ idx1];
      const unsigned char tmp2=data[0];
      data[0]=data[7] ^ tmp1;
      data[7]=data[6];
      data[6]=data[5] ^ tmp1;
      data[5]=data[4];
      data[4]=data[3];
      data[3]=data[2];
      data[2]=data[1];
      data[1]=tmp2;
      }
    RotateRight8Byte(localKey);
    }
}

void cCamCrypt::CamCrypt	(	const unsigned char *	key,
		unsigned char *	data
	)		[protected]

const unsigned char* cCamCrypt::CamKey

(

const unsigned char *

data

)

[inline, protected]

Definition at line 122 of file sc-irdeto.c.

Referenced by cSmartCardIrdeto::Init().

{ return data+8; }

const unsigned char* cCamCrypt::CamKey

(

const unsigned char *

data

)

[inline, protected]

Definition at line 122 of file sc-irdeto.c.

{ return data+8; }

bool cCamCrypt::EncryptCamMessage	(	unsigned char *	encrypted,
		const unsigned char *	plain
	)		[protected]

Definition at line 257 of file sc-irdeto.c.

References cRSA::RSA().

Referenced by cSmartCardIrdeto::Init().

{
  return rsa.RSA(encrypted,plain,64,cardExp,cardMod,false)>0;
}

bool cCamCrypt::EncryptCamMessage	(	unsigned char *	encrypted,
		const unsigned char *	plain
	)		[protected]

const unsigned char* cCamCrypt::HelperKey

(

const unsigned char *

data

)

[inline, protected]

Definition at line 123 of file sc-irdeto.c.

{ return data+24; }

const unsigned char* cCamCrypt::HelperKey

(

const unsigned char *

data

)

[inline, protected]

Definition at line 123 of file sc-irdeto.c.

Referenced by cSmartCardIrdeto::Init().

{ return data+24; }

void cCamCrypt::PrepareCamMessage

(

unsigned char *

plain

)

[protected]

void cCamCrypt::PrepareCamMessage

(

unsigned char *

plain

)

[protected]

Definition at line 238 of file sc-irdeto.c.

Referenced by cSmartCardIrdeto::Init().

{
/*
  static const unsigned char camMsg[] = {
    0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00
    };
  memcpy(plain,camMsg,sizeof(camMsg));
*/
  plain[0]=0x80;
  memset(plain+1 ,0x00,7);
  GenerateRandom(plain+16,16);
  memcpy(plain+8,plain+16,8);
  memset(plain+32,0xFF,31);
  plain[63]=0x00;
}

void cCamCrypt::RevCamCrypt	(	const unsigned char *	key,
		unsigned char *	data
	)		[protected]

void cCamCrypt::RevCamCrypt	(	const unsigned char *	key,
		unsigned char *	data
	)		[protected]

Definition at line 186 of file sc-irdeto.c.

References tmp1, and tmp2.

Referenced by cSmartCardIrdeto::Decode(), and cSmartCardIrdeto::Init().

{
  unsigned char localKey[8];
  memcpy(localKey,key,sizeof(localKey));
  for(int idx1=0 ; idx1<8 ; idx1++) {
    for(int idx2=0 ; idx2<8 ; idx2++) {
      const unsigned char tmp1=cryptTable[data[7] ^ localKey[idx2] ^ idx1];
      const unsigned char tmp2=data[0];
      data[0]=data[1];
      data[1]=data[2];
      data[2]=data[3];
      data[3]=data[4];
      data[4]=data[5];
      data[5]=data[6] ^ tmp1;
      data[6]=data[7];
      data[7]=tmp1 ^ tmp2 ;
      }
    RotateLeft8Byte(localKey);
    }
}

bool cCamCrypt::SetupCardFiles	(	unsigned char *	data,
		int	len,
		BIGNUM *	exp,
		BIGNUM *	mod
	)		[protected]

Definition at line 229 of file sc-irdeto.c.

References BN_complement(), and cRSA::RSA().

Referenced by cSmartCardIrdeto::Init().

{
  if(rsa.RSA(data,data,len,exp,mod,false)<=0 || (data[0]!=0x80 || data[11]!=0x40 || data[12]!=0x06))
    return false;
  BN_complement(data+13,64,cardMod);
  BN_bin2bn(data+13+64,6,cardExp);
  return true;
}

bool cCamCrypt::SetupCardFiles	(	unsigned char *	data,
		int	len,
		BIGNUM *	exp,
		BIGNUM *	mod
	)		[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/sc-irdeto/sc-irdeto.c
• systems/sc-irdeto/sc-irdeto.c