New CMS tests.

Add some ECDH CMS tests.
diff --git a/test/cms-test.pl b/test/cms-test.pl
index 3ccece3..fa4394c 100644
--- a/test/cms-test.pl
+++ b/test/cms-test.pl
@@ -384,6 +384,31 @@
           . " -recip $smdir/smrsa1.pem -keyopt rsa_padding_mode:oaep"
 	  . " -keyopt rsa_oaep_md:sha256",
         "-decrypt -recip $smdir/smrsa1.pem -in test.cms -out smtst.txt"
+    ],
+
+    [
+"enveloped content test streaming S/MIME format, ECDH",
+        "-encrypt -in smcont.txt"
+          . " -stream -out test.cms"
+          . " -recip $smdir/smec1.pem",
+        "-decrypt -recip $smdir/smec1.pem -in test.cms -out smtst.txt"
+    ],
+
+    [
+"enveloped content test streaming S/MIME format, ECDH, AES128, SHA256 KDF",
+        "-encrypt -in smcont.txt"
+          . " -stream -out test.cms"
+          . " -recip $smdir/smec1.pem -aes128 -keyopt ecdh_kdf_md:sha256",
+        "-decrypt -recip $smdir/smec1.pem -in test.cms -out smtst.txt"
+    ],
+
+    [
+"enveloped content test streaming S/MIME format, ECDH, K-283, cofactor DH",
+        "-encrypt -in smcont.txt"
+          . " -stream -out test.cms"
+          . " -recip $smdir/smec2.pem -aes128"
+	  . " -keyopt ecdh_kdf_md:sha256 -keyopt ecdh_cofactor_mode:1",
+        "-decrypt -recip $smdir/smec2.pem -in test.cms -out smtst.txt"
     ]
 );