def sendClientNewLicenseRequest(self, licenseRequest):
"""
@summary: Create new license request in response to server license request
@param licenseRequest: {ServerLicenseRequest}
@see: http://msdn.microsoft.com/en-us/library/cc241989.aspx
@see: http://msdn.microsoft.com/en-us/library/cc241918.aspx
"""
#get server information
serverRandom = licenseRequest.serverRandom.value
if self._transport.getGCCServerSettings().SC_SECURITY.serverCertificate._is_readed:
serverCertificate = self._transport.getGCCServerSettings().SC_SECURITY.serverCertificate
else:
s = Stream(licenseRequest.serverCertificate.blobData.value)
serverCertificate = gcc.ServerCertificate()
s.readType(serverCertificate)
#generate crypto values
clientRandom = rsa.random(256)
preMasterSecret = rsa.random(384)
masterSecret = sec.masterSecret(preMasterSecret, clientRandom, serverRandom)
sessionKeyBlob = sec.masterSecret(masterSecret, serverRandom, clientRandom)
self._macSalt = sessionKeyBlob[:16]
self._licenseKey = sec.finalHash(sessionKeyBlob[16:32], clientRandom, serverRandom)
#format message
message = ClientNewLicenseRequest()
message.clientRandom.value = clientRandom
message.encryptedPreMasterSecret.blobData.value = rsa.encrypt(preMasterSecret[::-1], serverCertificate.certData.getPublicKey())[::-1] + "\x00" * 8
message.ClientMachineName.blobData.value = self._hostname + "\x00"
message.ClientUserName.blobData.value = self._username + "\x00"
self._transport.sendFlagged(sec.SecurityFlag.SEC_LICENSE_PKT, LicPacket(message))
def getCertificate(self):
"""
@summary: generate proprietary certificate from rsa public key
"""
certificate = gcc.ProprietaryServerCertificate()
certificate.PublicKeyBlob.modulus.value = rsa.int2bytes(self._rsaPublicKey.n)[::-1]
certificate.PublicKeyBlob.pubExp.value = self._rsaPublicKey.e
certificate.sign()
return gcc.ServerCertificate(certificate)