# getOid method

String getOid()

Gets the the OID of the certificate extension.

return The OID of the certificate extension. throws BiosealException An error has occurred during Bioseal Library execution.

## Implementation

    String getOid() {
      Pointer<Char> pOid = nullptr;
      Pointer<Int> pOidSize = calloc.allocate(1);
      pOidSize[0] = -1;
      try {
        var err = biosealSDK.id3BiosealCertificateExtension_GetOid(_pHandle.value, pOid, pOidSize);
        if (err == BiosealError.insufficientBuffer.value) {
          pOid = calloc.allocate(pOidSize.value);
          err = biosealSDK.id3BiosealCertificateExtension_GetOid(_pHandle.value, pOid, pOidSize);
          if (err != BiosealError.success.value) {
            throw BiosealException(err);
          }
        }
        final vOid = utf8.decode(Uint8List.fromList(pOid.cast<Uint8>().asTypedList(pOidSize.value)));
        return vOid;
      } finally {
        calloc.free(pOid);
        calloc.free(pOidSize);
      }
    }