def getCommonName(self): """Get the Subject's Common Name from the certificate. The cryptlib_py module must be installed in order to use this function. @rtype: str or None @return: The CN component of the certificate's subject DN, if present. """ import cryptlib_py import array c = cryptlib_py.cryptImportCert(self.bytes, cryptlib_py.CRYPT_UNUSED) name = cryptlib_py.CRYPT_CERTINFO_COMMONNAME try: try: length = cryptlib_py.cryptGetAttributeString(c, name, None) returnVal = array.array("B", [0] * length) cryptlib_py.cryptGetAttributeString(c, name, returnVal) returnVal = returnVal.tostring() except cryptlib_py.CryptException, e: if e[0] == cryptlib_py.CRYPT_ERROR_NOTFOUND: returnVal = None return returnVal
def getCommonName(self): """Get the Subject's Common Name from the certificate. The cryptlib_py module must be installed in order to use this function. @rtype: str or None @return: The CN component of the certificate's subject DN, if present. """ import cryptlib_py import array c = cryptlib_py.cryptImportCert(self.bytes, cryptlib_py.CRYPT_UNUSED) name = cryptlib_py.CRYPT_CERTINFO_COMMONNAME try: try: length = cryptlib_py.cryptGetAttributeString(c, name, None) returnVal = array.array('B', [0] * length) cryptlib_py.cryptGetAttributeString(c, name, returnVal) returnVal = returnVal.tostring() except cryptlib_py.CryptException as e: if e[0] == cryptlib_py.CRYPT_ERROR_NOTFOUND: returnVal = None return returnVal finally: cryptlib_py.cryptDestroyCert(c)
def validate(self, x509TrustList): """Check the validity of the certificate chain. This checks that every certificate in the chain validates with the subsequent one, until some certificate validates with (or is identical to) one of the passed-in root certificates. The cryptlib_py module must be installed in order to use this function. @type x509TrustList: list of L{tlslite.X509.X509} @param x509TrustList: A list of trusted root certificates. The certificate chain must extend to one of these certificates to be considered valid. """ import cryptlib_py c1 = None c2 = None lastC = None rootC = None try: rootFingerprints = [c.getFingerprint() for c in x509TrustList] #Check that every certificate in the chain validates with the #next one for cert1, cert2 in zip(self.x509List, self.x509List[1:]): #If we come upon a root certificate, we're done. if cert1.getFingerprint() in rootFingerprints: return True c1 = cryptlib_py.cryptImportCert(cert1.writeBytes(), cryptlib_py.CRYPT_UNUSED) c2 = cryptlib_py.cryptImportCert(cert2.writeBytes(), cryptlib_py.CRYPT_UNUSED) try: cryptlib_py.cryptCheckCert(c1, c2) except: return False cryptlib_py.cryptDestroyCert(c1) c1 = None cryptlib_py.cryptDestroyCert(c2) c2 = None #If the last certificate is one of the root certificates, we're #done. if self.x509List[-1].getFingerprint() in rootFingerprints: return True #Otherwise, find a root certificate that the last certificate #chains to, and validate them. lastC = cryptlib_py.cryptImportCert(self.x509List[-1].writeBytes(), cryptlib_py.CRYPT_UNUSED) for rootCert in x509TrustList: rootC = cryptlib_py.cryptImportCert(rootCert.writeBytes(), cryptlib_py.CRYPT_UNUSED) if self._checkChaining(lastC, rootC): try: cryptlib_py.cryptCheckCert(lastC, rootC) return True except: return False return False finally: if not (c1 is None): cryptlib_py.cryptDestroyCert(c1) if not (c2 is None): cryptlib_py.cryptDestroyCert(c2) if not (lastC is None): cryptlib_py.cryptDestroyCert(lastC) if not (rootC is None): cryptlib_py.cryptDestroyCert(rootC)