Merge `signal-protocol` into `omemo` plugin

Same reasoning as for the `openpgp` plugin.

1 files changed, 40 insertions, 0 deletions

diff --git a/plugins/omemo/src/signal/simple_iks.vala b/plugins/omemo/src/signal/simple_iks.vala
new file mode 100644
index 00000000..5247c455
--- /dev/null
+++ b/plugins/omemo/src/signal/simple_iks.vala
@@ -0,0 +1,40 @@
+using Gee;
+
+namespace Signal {
+
+public class SimpleIdentityKeyStore : IdentityKeyStore {
+    public override Bytes identity_key_private { get; set; }
+    public override Bytes identity_key_public { get; set; }
+    public override uint32 local_registration_id { get; set; }
+    private Map<string, Map<int, IdentityKeyStore.TrustedIdentity>> trusted_identities = new HashMap<string, Map<int, IdentityKeyStore.TrustedIdentity>>();
+
+    public override void save_identity(Address address, uint8[] key) throws Error {
+        string name = address.name;
+        if (trusted_identities.has_key(name)) {
+            if (trusted_identities[name].has_key(address.device_id)) {
+                trusted_identities[name][address.device_id].key = key;
+                trusted_identity_updated(trusted_identities[name][address.device_id]);
+            } else {
+                trusted_identities[name][address.device_id] = new TrustedIdentity.by_address(address, key);
+                trusted_identity_added(trusted_identities[name][address.device_id]);
+            }
+        } else {
+            trusted_identities[name] = new HashMap<int, IdentityKeyStore.TrustedIdentity>();
+            trusted_identities[name][address.device_id] = new TrustedIdentity.by_address(address, key);
+            trusted_identity_added(trusted_identities[name][address.device_id]);
+        }
+    }
+
+    public override bool is_trusted_identity(Address address, uint8[] key) throws Error {
+        if (!trusted_identities.has_key(address.name)) return true;
+        if (!trusted_identities[address.name].has_key(address.device_id)) return true;
+        uint8[] other_key = trusted_identities[address.name][address.device_id].key;
+        if (other_key.length != key.length) return false;
+        for (int i = 0; i < key.length; i++) {
+            if (other_key[i] != key[i]) return false;
+        }
+        return true;
+    }
+}
+
+}