crypto-test: generate and encrypt RC4 test messages

With openssl.  N.B., only the "-K" option to "openssl enc" allows
specifying a raw RC4 key (in hex), all others (-k, -kfile, -pass) go
through a KDF (sha256, by default) which is not what the mobilpay flow
does.

Author: vamposdecampos

docker/crypto-test/Dockerfile

@@ -19,6 +19,27 @@ RUN \
 				-out $d/public.pem \
 				-subj "/OU=test/CN=$side" \
 				-days 36525 ; \
+			openssl rsa \
+				-in $d/private.pem \
+				-out $d/rawpublic.pem \
+				-outform PEM \
+				-pubout ; \
+			echo "message from $side" > $d/msg.clear ; \
+			openssl rand 16 > $d/enc.key ; \
+			openssl enc \
+				-rc4 \
+				-nosalt \
+				-in $d/msg.clear \
+				-out $d/msg.enc \
+				-K $(od -tx1 -An < $d/enc.key | tr -d ' ') ; \
+			base64 -w0 < $d/msg.enc > $d/msg.enc.b64 ; \
+			openssl rsautl \
+				-encrypt \
+				-inkey $d/rawpublic.pem \
+				-pubin \
+				-in $d/enc.key \
+				-out $d/enc.key.rsaenc ; \
+			base64 -w0 < $d/enc.key.rsaenc > $d/enc.key.rsaenc.b64 ; \
 		done ; \
 	done