Update some demos

demos/sdf/sdf-ssf33.sh

@@ -0,0 +1,16 @@
+#!/bin/bash -x
+
+#key=00000000000000000000000000000000
+#iv=00000000000000000000000000000000
+
+key=12345678123456781234567812345678
+iv=12345678123456781234567812345678
+plaintext="This is the plaintext message."
+
+# FIXME: sm1/ssf33 is unkonwn to enc command
+ciphertext=`echo $plaintext | sudo gmssl enc -sm1 -engine sdf -K $key -iv $iv -a`
+plaintext=`echo $ciphertext | sudo gmssl enc -sm1 -d -engine sdf -K $key -iv $iv -a`
+
+echo "Ciphertext: $ciphertext"
+echo "Plaintext: $plaintext"
+