From 013f27f3dc8de747e82b74055c4dde55ca04b4c9 Mon Sep 17 00:00:00 2001
From: Richard van der Hoff <richard@matrix.org>
Date: Wed, 25 May 2016 14:42:49 +0100
Subject: Javascript bindings for group sessions

---
 javascript/olm_inbound_group_session.js | 78 +++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 javascript/olm_inbound_group_session.js

(limited to 'javascript/olm_inbound_group_session.js')

diff --git a/javascript/olm_inbound_group_session.js b/javascript/olm_inbound_group_session.js
new file mode 100644
index 0000000..cfb557f
--- /dev/null
+++ b/javascript/olm_inbound_group_session.js
@@ -0,0 +1,78 @@
+function InboundGroupSession() {
+    var size = Module['_olm_inbound_group_session_size']();
+    this.buf = malloc(size);
+    this.ptr = Module['_olm_inbound_group_session'](this.buf);
+}
+
+function inbound_group_session_method(wrapped) {
+    return function() {
+        var result = wrapped.apply(this, arguments);
+        if (result === OLM_ERROR) {
+            var message = Pointer_stringify(
+                Module['_olm_inbound_group_session_last_error'](arguments[0])
+            );
+            throw new Error("OLM." + message);
+        }
+        return result;
+    }
+}
+
+InboundGroupSession.prototype['free'] = function() {
+    Module['_olm_clear_inbound_group_session'](this.ptr);
+    free(this.ptr);
+}
+
+InboundGroupSession.prototype['pickle'] = restore_stack(function(key) {
+    var key_array = array_from_string(key);
+    var pickle_length = inbound_group_session_method(
+        Module['_olm_pickle_inbound_group_session_length']
+    )(this.ptr);
+    var key_buffer = stack(key_array);
+    var pickle_buffer = stack(pickle_length);
+    inbound_group_session_method(Module['_olm_pickle_inbound_group_session'])(
+        this.ptr, key_buffer, key_array.length, pickle_buffer, pickle_length
+    );
+    return Pointer_stringify(pickle_buffer, pickle_length);
+});
+
+InboundGroupSession.prototype['unpickle'] = restore_stack(function(key, pickle) {
+    var key_array = array_from_string(key);
+    var key_buffer = stack(key_array);
+    var pickle_array = array_from_string(pickle);
+    var pickle_buffer = stack(pickle_array);
+    inbound_group_session_method(Module['_olm_unpickle_inbound_group_session'])(
+        this.ptr, key_buffer, key_array.length, pickle_buffer,
+        pickle_array.length
+    );
+});
+
+InboundGroupSession.prototype['create'] = restore_stack(function(message_index, session_key) {
+    var key_array = array_from_string(session_key);
+    var key_buffer = stack(key_array);
+
+    inbound_group_session_method(Module['_olm_init_inbound_group_session'])(
+        this.ptr, message_index, key_buffer, key_array.length
+    );
+});
+
+InboundGroupSession.prototype['decrypt'] = restore_stack(function(
+    message
+) {
+    var message_array = array_from_string(message);
+    var message_buffer = stack(message_array);
+    var max_plaintext_length = session_method(
+        Module['_olm_group_decrypt_max_plaintext_length']
+    )(this.ptr, message_buffer, message_array.length);
+    // caculating the length destroys the input buffer.
+    // So we copy the array to a new buffer
+    var message_buffer = stack(message_array);
+    var plaintext_buffer = stack(max_plaintext_length);
+    var plaintext_length = session_method(Module["_olm_group_decrypt"])(
+        this.ptr,
+        message_buffer, message.length,
+        plaintext_buffer, max_plaintext_length
+    );
+    return Pointer_stringify(plaintext_buffer, plaintext_length);
+});
+
+olm_exports['InboundGroupSession'] = InboundGroupSession;
-- 
cgit v1.2.3


From 389a181ea860107aad3f657bc54476fc3b824080 Mon Sep 17 00:00:00 2001
From: Richard van der Hoff <richard@matrix.org>
Date: Thu, 26 May 2016 13:57:09 +0100
Subject: javascript/olm_inbound_group_session.js: fix length arg

message.length counts codepoints; we need bytes.
---
 javascript/olm_inbound_group_session.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'javascript/olm_inbound_group_session.js')

diff --git a/javascript/olm_inbound_group_session.js b/javascript/olm_inbound_group_session.js
index cfb557f..9d526c4 100644
--- a/javascript/olm_inbound_group_session.js
+++ b/javascript/olm_inbound_group_session.js
@@ -69,7 +69,7 @@ InboundGroupSession.prototype['decrypt'] = restore_stack(function(
     var plaintext_buffer = stack(max_plaintext_length);
     var plaintext_length = session_method(Module["_olm_group_decrypt"])(
         this.ptr,
-        message_buffer, message.length,
+        message_buffer, message_array.length,
         plaintext_buffer, max_plaintext_length
     );
     return Pointer_stringify(plaintext_buffer, plaintext_length);
-- 
cgit v1.2.3