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authorRichard van der Hoff <github@rvanderhoff.org.uk>2016-09-05 10:37:55 +0100
committerGitHub <noreply@github.com>2016-09-05 10:37:55 +0100
commitfee1748c60f48fbe3a243a36fcfcc7e8be6e4a78 (patch)
tree00629a7ab2bcb74c01e610607767db50015e98c5 /javascript/olm_outbound_group_session.js
parent9d16d820890e7b301baa8b69694aaea19f9bfc7f (diff)
parent1d4c13c798639c925825c70150b138553f8dff49 (diff)
Merge pull request #16 from matrix-org/rav/fix_megolm_utf8
Fix megolm decryption of UTF-8
Diffstat (limited to 'javascript/olm_outbound_group_session.js')
-rw-r--r--javascript/olm_outbound_group_session.js22
1 files changed, 14 insertions, 8 deletions
diff --git a/javascript/olm_outbound_group_session.js b/javascript/olm_outbound_group_session.js
index 277a882..e59c8bb 100644
--- a/javascript/olm_outbound_group_session.js
+++ b/javascript/olm_outbound_group_session.js
@@ -1,3 +1,9 @@
+/* The 'length' argument to Pointer_stringify doesn't work if the input includes
+ * characters >= 128; we therefore need to add a NULL character to all of our
+ * strings. This acts as a symbolic constant to help show what we're doing.
+ */
+var NULL_BYTE_PADDING_LENGTH = 1;
+
function OutboundGroupSession() {
var size = Module['_olm_outbound_group_session_size']();
@@ -29,11 +35,11 @@ OutboundGroupSession.prototype['pickle'] = restore_stack(function(key) {
Module['_olm_pickle_outbound_group_session_length']
)(this.ptr);
var key_buffer = stack(key_array);
- var pickle_buffer = stack(pickle_length);
+ var pickle_buffer = stack(pickle_length + NULL_BYTE_PADDING_LENGTH);
outbound_group_session_method(Module['_olm_pickle_outbound_group_session'])(
this.ptr, key_buffer, key_array.length, pickle_buffer, pickle_length
);
- return Pointer_stringify(pickle_buffer, pickle_length);
+ return Pointer_stringify(pickle_buffer);
});
OutboundGroupSession.prototype['unpickle'] = restore_stack(function(key, pickle) {
@@ -63,35 +69,35 @@ OutboundGroupSession.prototype['encrypt'] = restore_stack(function(plaintext) {
Module['_olm_group_encrypt_message_length']
)(this.ptr, plaintext_array.length);
var plaintext_buffer = stack(plaintext_array);
- var message_buffer = stack(message_length);
+ var message_buffer = stack(message_length + NULL_BYTE_PADDING_LENGTH);
outbound_group_session_method(Module['_olm_group_encrypt'])(
this.ptr,
plaintext_buffer, plaintext_array.length,
message_buffer, message_length
);
- return Pointer_stringify(message_buffer, message_length);
+ return Pointer_stringify(message_buffer);
});
OutboundGroupSession.prototype['session_id'] = restore_stack(function(key) {
var length = outbound_group_session_method(
Module['_olm_outbound_group_session_id_length']
)(this.ptr);
- var session_id = stack(length);
+ var session_id = stack(length + NULL_BYTE_PADDING_LENGTH);
outbound_group_session_method(Module['_olm_outbound_group_session_id'])(
this.ptr, session_id, length
);
- return Pointer_stringify(session_id, length);
+ return Pointer_stringify(session_id);
});
OutboundGroupSession.prototype['session_key'] = restore_stack(function(key) {
var key_length = outbound_group_session_method(
Module['_olm_outbound_group_session_key_length']
)(this.ptr);
- var key = stack(key_length);
+ var key = stack(key_length + NULL_BYTE_PADDING_LENGTH);
outbound_group_session_method(Module['_olm_outbound_group_session_key'])(
this.ptr, key, key_length
);
- return Pointer_stringify(key, key_length);
+ return Pointer_stringify(key);
});
OutboundGroupSession.prototype['message_index'] = function() {