From bd2e59e9e0711e803bd805d16cd1bca5f998647f Mon Sep 17 00:00:00 2001
From: Maciek Borzecki <maciek.borzecki@gmail.com>
Date: Sat, 17 Jan 2015 22:14:45 +0100
Subject: [PATCH] devicechannel: decrypt encrypted data

---
 src/devicechannel.vala | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/devicechannel.vala b/src/devicechannel.vala
index b767a53..5d4af8b 100644
--- a/src/devicechannel.vala
+++ b/src/devicechannel.vala
@@ -142,6 +142,23 @@ class DeviceChannel : Object {
 	}
 
 	private void handle_encrypted_packet(Packet pkt) {
+		// Ecypted packets have 'data' member in body. The 'data'
+		// member is an array of strings, each string is base64
+		// encoded data, of length appropriate for channel ecryption
+		// method.
+		Json.Array arr = pkt.body.get_array_member("data");
+		if (arr == null) {
+			critical("missing data member in encrypted packet");
+			return;
+		}
 
+		var msgbytes = new ByteArray();
+		arr.foreach_element((a, i, node) => {
+				debug("node data: %s", node.get_string());
+				uchar[] data = Base64.decode(node.get_string());
+				var dbytes = new Bytes.take(data);
+				Bytes decrypted = this._crypt.decrypt(dbytes);
+				msgbytes.append(decrypted.get_data());
+			});
 	}
 }
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