3b34ccad66
Add encoding interfaces for DER encoding: 1. support decoding of 'bit string', 'octet string', 'object id' and 'context specific tag' for DER encoder. 2. implemented a simple DER encoder. 3. add more testsuits for DER encoder. Signed-off-by: lei he <helei.sig11@bytedance.com> Message-Id: <20221008085030.70212-3-helei.sig11@bytedance.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>