From d5ea5172a754848c10d061a4a9dd777f63ba71c1 Mon Sep 17 00:00:00 2001
From: Marvin W <git@larma.de>
Date: Sat, 11 Mar 2017 01:29:38 +0100
Subject: Add OMEMO via Plugin

---
 plugins/signal-protocol/src/context.vala | 101 +++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 plugins/signal-protocol/src/context.vala

(limited to 'plugins/signal-protocol/src/context.vala')

diff --git a/plugins/signal-protocol/src/context.vala b/plugins/signal-protocol/src/context.vala
new file mode 100644
index 00000000..38ac3662
--- /dev/null
+++ b/plugins/signal-protocol/src/context.vala
@@ -0,0 +1,101 @@
+namespace Signal {
+
+public class Context {
+    internal NativeContext native_context;
+    private RecMutex mutex = RecMutex();
+
+    static void locking_function_lock(void* user_data) {
+        Context ctx = (Context) user_data;
+        ctx.mutex.lock();
+    }
+
+    static void locking_function_unlock(void* user_data) {
+        Context ctx = (Context) user_data;
+        ctx.mutex.unlock();
+    }
+
+    static void stderr_log(LogLevel level, string message, void* user_data) {
+        printerr(@"$level: $message\n");
+    }
+
+    public Context(bool log = false) throws Error {
+        throw_by_code(NativeContext.create(out native_context, this), "Error initializing native context");
+        throw_by_code(native_context.set_locking_functions(locking_function_lock, locking_function_unlock), "Error initializing native locking functions");
+        if (log) native_context.set_log_function(stderr_log);
+        setup_crypto_provider(native_context);
+    }
+
+    public Store create_store() {
+        return new Store(this);
+    }
+
+    public void randomize(uint8[] data) throws Error {
+        throw_by_code(Signal.native_random(native_context, data));
+    }
+
+    public SignedPreKeyRecord generate_signed_pre_key(IdentityKeyPair identity_key_pair, int32 id, uint64 timestamp = 0) throws Error {
+        if (timestamp == 0) timestamp = new DateTime.now_local().to_unix();
+        SignedPreKeyRecord res;
+        throw_by_code(Protocol.KeyHelper.generate_signed_pre_key(out res, identity_key_pair, id, timestamp, native_context));
+        return res;
+    }
+
+    public Gee.Set<PreKeyRecord> generate_pre_keys(uint start, uint count) throws Error {
+        Gee.Set<PreKeyRecord> res = new Gee.HashSet<PreKeyRecord>();
+        for(uint i = start; i < start+count; i++) {
+            ECKeyPair pair = generate_key_pair();
+            res.add(new PreKeyRecord(i, pair));
+        }
+        return res;
+    }
+
+    public ECPublicKey decode_public_key(uint8[] bytes) throws Error {
+        ECPublicKey public_key;
+        throw_by_code(curve_decode_point(out public_key, bytes, native_context), "Error decoding public key");
+        return public_key;
+    }
+
+    public ECPrivateKey decode_private_key(uint8[] bytes) throws Error {
+        ECPrivateKey private_key;
+        throw_by_code(curve_decode_private_point(out private_key, bytes, native_context), "Error decoding private key");
+        return private_key;
+    }
+
+    public ECKeyPair generate_key_pair() throws Error {
+        ECKeyPair key_pair;
+        throw_by_code(curve_generate_key_pair(native_context, out key_pair), "Error generating key pair");
+        return key_pair;
+    }
+
+    public uint8[] calculate_signature(ECPrivateKey signing_key, uint8[] message) throws Error {
+        Buffer signature;
+        throw_by_code(Curve.calculate_signature(native_context, out signature, signing_key, message), "Error calculating signature");
+        return signature.data;
+    }
+
+    public SignalMessage deserialize_signal_message(uint8[] data) throws Error {
+        SignalMessage res;
+        throw_by_code(signal_message_deserialize(out res, data, native_context));
+        return res;
+    }
+
+    public SignalMessage copy_signal_message(CiphertextMessage original) throws Error {
+        SignalMessage res;
+        throw_by_code(signal_message_copy(out res, (SignalMessage) original, native_context));
+        return res;
+    }
+
+    public PreKeySignalMessage deserialize_pre_key_signal_message(uint8[] data) throws Error {
+        PreKeySignalMessage res;
+        throw_by_code(pre_key_signal_message_deserialize(out res, data, native_context));
+        return res;
+    }
+
+    public PreKeySignalMessage copy_pre_key_signal_message(CiphertextMessage original) throws Error {
+        PreKeySignalMessage res;
+        throw_by_code(pre_key_signal_message_copy(out res, (PreKeySignalMessage) original, native_context));
+        return res;
+    }
+}
+
+}
\ No newline at end of file
-- 
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