cSystemConax Class Reference

Inheritance diagram for cSystemConax:

List of all members.

Public Member Functions
	cSystemConax (void)
virtual bool	ProcessECM (const cEcmInfo *ecm, unsigned char *source)

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Detailed Description

Definition at line 52 of file conax.c.

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Constructor & Destructor Documentation

cSystemConax::cSystemConax

(

void

)

Definition at line 62 of file conax.c.

:cSystem(SYSTEM_NAME,SYSTEM_PRI)
{}

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Member Function Documentation

bool cSystemConax::ProcessECM	(	const cEcmInfo *	ecm,
		unsigned char *	source
	)		[virtual]

Implements cSystem.

Definition at line 88 of file conax.c.

References cSystem::doLog, exp, cPlainKeys::FindKey(), cPlainKey::Get(), hash, keys, L_SYS_CRYPTO, L_SYS_ECM, L_SYS_KEY, mod, cKeySnoop::OK(), PRINTF, and cRSA::RSA().

{
  int length=source[4]-2;
  const int keyid=source[6];
  const int nano=source[5];
  source+=7;

  cKeySnoop ks(this,'C',keyid,'M');
  cPlainKey *pk;
  cBN mod, exp;
  if(!(pk=keys.FindKey('C',keyid,'E',-1))) {
    if(doLog) PRINTF(L_SYS_KEY,"missing %02X E key",keyid);
    return false;
    }
  pk->Get(exp);
  if(!(pk=keys.FindKey('C',keyid,'M',-1))) {
    if(doLog) PRINTF(L_SYS_KEY,"missing %02X M key",keyid);
    return false;
    }
  pk->Get(mod);

  for(int i=length ; i>0 ;) {
    int index=i-64;
    if(index<0) index=0;
    if(rsa.RSA(source+index,source+index,64,exp,mod,false)<=0) {
      if(doLog) PRINTF(L_SYS_CRYPTO,"RSA failed");
      return false;
      }
    if(nano==0x63) {
      // nano 0x63 block only decodes to 63 bytes
      memmove(source+index,source+index+1,length-(index+1));
      length-=1;
      }
    i-=(i%60 && index) ? i%60 : 64;
    }

  static const unsigned char hash[] = { 0x05,0x00,0x05 };
  if(memcmp(hash,source+2,3) || memcmp(source+5,source+length-5,3)) {
    if(doLog) PRINTF(L_SYS_ECM,"signature check failed");
    return false;
    }

  ParseECM(source+10,length-10);
  ks.OK(pk);
  return true;
}

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

• sc/PLUGINS/src/sc-src/systems/conax/conax.c