Compute the EncKdcRepPart length
EncKdcRepPart : 0x30 L1 EncKdcRepPart sequence | +--> 0xA0 L2 key tag | | | +--> 0x30 L2-1 key ( EncryptionKey) | +--> 0xA1 L3 last-req tag | | | +--> 0x30 L3-1 last-req ( LastReq ) | +--> 0xA2 L4 nonce tag | | | +--> 0x02 L4-1 nonce (Int) | [+--> 0xA3 0x11 key-expiration tag] | | | +--> 0x18 0x0F key-expiration ( KerberosTime ) | +--> 0xA4 0x07 flags tag | | | +--> 0x03 0x05 flags ( TicketFlags ) | +--> 0xA5 0x11 authtime tag | | | +--> 0x18 0x0F authtime ( KerberosTime ) | [+--> 0xA6 0x11 starttime tag] | | | +--> 0x18 0x0F starttime ( KerberosTime ) | +--> 0xA7 0x11 endtime tag | | | +--> 0x18 0x0F endtime ( KerberosTime ) | [+--> 0xA8 0x11 renew-till tag] | | | +--> 0x18 0x0F renew-till ( KerberosTime ) | +--> 0xA9 L5 srealm tag | | | +--> 0x1B L5-1 srealm ( KerberosString ) | +--> 0xAA L6 sname tag | | | +--> 0x30 L6-1 sname ( PrincipalName ) | [+--> 0xAB L7 caddr tag] | +--> 0x30 L7-1 caddr ( HostAddresses )