WebAssembly support!
Quite a lot going on in this PR: * Updates to support recent emscripten, switching to WASM which is now the default * Use emscripten's MODULARIZE option rather than wrapping it ourself, since doing so in pre-post js doesn't work anymore. * Most changes are moving the emscripten runtime functions to top-level calls rather than in the Module object. * Get rid of duplicated NULL_BYTE_PADDING_LENGTH * Fix ciphertext_length used without being declared * Fix things that caused the closure compiler to error, eg. using OLM_OPTIONS without a declaration. * Wait until module is inited to do OLM_ERROR = olm_error() The main BREAKING CHANGE here is that the module now needs to initialise asyncronously (because it has to load the wasm file). require()ing olm now gives a function which needs to be called to create an instance. The resulting object has a promise-like then() method that can be used to detect when the module is ready. (We could use MODULARIZE_INSTANCE to return the module directly as before, rather than the function, but then we don't get the .then() method).
This commit is contained in:
parent
ed02c217e6
commit
122867c45c
10 changed files with 84 additions and 76 deletions
4
Makefile
4
Makefile
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@ -20,6 +20,7 @@ DEBUG_TARGET := $(BUILD_DIR)/libolm_debug.so.$(VERSION)
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JS_TARGET := javascript/olm.js
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JS_EXPORTED_FUNCTIONS := javascript/exported_functions.json
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JS_EXTRA_EXPORTED_RUNTIME_METHODS := ALLOC_STACK
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PUBLIC_HEADERS := include/olm/olm.h include/olm/outbound_group_session.h include/olm/inbound_group_session.h include/olm/pk.h
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@ -60,7 +61,7 @@ CFLAGS += -Wall -Werror -std=c99 -fPIC
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CXXFLAGS += -Wall -Werror -std=c++11 -fPIC
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LDFLAGS += -Wall -Werror
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EMCCFLAGS = --closure 1 --memory-init-file 0 -s NO_FILESYSTEM=1 -s INVOKE_RUN=0
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EMCCFLAGS = --closure 1 --memory-init-file 0 -s NO_FILESYSTEM=1 -s INVOKE_RUN=0 -s MODULARIZE=1
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# NO_BROWSER is kept for compatibility with emscripten 1.35.24, but is no
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# longer needed.
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EMCCFLAGS += -s NO_BROWSER=1
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@ -150,6 +151,7 @@ $(JS_TARGET): $(JS_OBJECTS) $(JS_PRE) $(JS_POST) $(JS_EXPORTED_FUNCTIONS)
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$(foreach f,$(JS_PRE),--pre-js $(f)) \
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$(foreach f,$(JS_POST),--post-js $(f)) \
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-s "EXPORTED_FUNCTIONS=@$(JS_EXPORTED_FUNCTIONS)" \
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-s "EXTRA_EXPORTED_RUNTIME_METHODS=$(JS_EXTRA_EXPORTED_RUNTIME_METHODS)" \
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$(JS_OBJECTS) -o $@
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build_tests: $(TEST_BINARIES)
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1
javascript/.gitignore
vendored
1
javascript/.gitignore
vendored
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@ -2,4 +2,5 @@
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/node_modules
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/npm-debug.log
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/olm.js
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/olm.wasm
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/reports
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@ -1,9 +1,3 @@
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/* The 'length' argument to Pointer_stringify doesn't work if the input includes
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* characters >= 128; we therefore need to add a NULL character to all of our
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* strings. This acts as a symbolic constant to help show what we're doing.
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*/
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var NULL_BYTE_PADDING_LENGTH = 1;
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function InboundGroupSession() {
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var size = Module['_olm_inbound_group_session_size']();
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this.buf = malloc(size);
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@ -77,14 +71,14 @@ InboundGroupSession.prototype['decrypt'] = restore_stack(function(
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try {
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message_buffer = malloc(message.length);
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Module['writeAsciiToMemory'](message, message_buffer, true);
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writeAsciiToMemory(message, message_buffer, true);
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var max_plaintext_length = inbound_group_session_method(
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Module['_olm_group_decrypt_max_plaintext_length']
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)(this.ptr, message_buffer, message.length);
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// caculating the length destroys the input buffer, so we need to re-copy it.
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Module['writeAsciiToMemory'](message, message_buffer, true);
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writeAsciiToMemory(message, message_buffer, true);
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plaintext_buffer = malloc(max_plaintext_length + NULL_BYTE_PADDING_LENGTH);
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var message_index = stack(4);
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@ -100,14 +94,14 @@ InboundGroupSession.prototype['decrypt'] = restore_stack(function(
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// UTF8ToString requires a null-terminated argument, so add the
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// null terminator.
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Module['setValue'](
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setValue(
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plaintext_buffer+plaintext_length,
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0, "i8"
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);
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return {
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"plaintext": UTF8ToString(plaintext_buffer),
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"message_index": Module['getValue'](message_index, "i32")
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"message_index": getValue(message_index, "i32")
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}
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} finally {
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if (message_buffer !== undefined) {
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@ -1,10 +1,3 @@
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/* The 'length' argument to Pointer_stringify doesn't work if the input includes
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* characters >= 128; we therefore need to add a NULL character to all of our
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* strings. This acts as a symbolic constant to help show what we're doing.
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*/
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var NULL_BYTE_PADDING_LENGTH = 1;
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function OutboundGroupSession() {
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var size = Module['_olm_outbound_group_session_size']();
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this.buf = malloc(size);
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@ -66,7 +59,7 @@ OutboundGroupSession.prototype['create'] = restore_stack(function() {
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OutboundGroupSession.prototype['encrypt'] = function(plaintext) {
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var plaintext_buffer, message_buffer, plaintext_length;
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try {
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plaintext_length = Module['lengthBytesUTF8'](plaintext);
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plaintext_length = lengthBytesUTF8(plaintext);
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var message_length = outbound_group_session_method(
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Module['_olm_group_encrypt_message_length']
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@ -75,7 +68,7 @@ OutboundGroupSession.prototype['encrypt'] = function(plaintext) {
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// need to allow space for the terminator (which stringToUTF8 always
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// writes), hence + 1.
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plaintext_buffer = malloc(plaintext_length + 1);
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Module['stringToUTF8'](plaintext, plaintext_buffer, plaintext_length + 1);
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stringToUTF8(plaintext, plaintext_buffer, plaintext_length + 1);
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message_buffer = malloc(message_length + NULL_BYTE_PADDING_LENGTH);
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outbound_group_session_method(Module['_olm_group_encrypt'])(
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@ -86,12 +79,12 @@ OutboundGroupSession.prototype['encrypt'] = function(plaintext) {
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// UTF8ToString requires a null-terminated argument, so add the
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// null terminator.
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Module['setValue'](
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setValue(
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message_buffer+message_length,
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0, "i8"
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);
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return Module['UTF8ToString'](message_buffer);
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return UTF8ToString(message_buffer);
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} finally {
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if (plaintext_buffer !== undefined) {
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// don't leave a copy of the plaintext in the heap.
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@ -35,9 +35,9 @@ PkEncryption.prototype['encrypt'] = restore_stack(function(
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) {
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var plaintext_buffer, ciphertext_buffer, plaintext_length;
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try {
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plaintext_length = Module['lengthBytesUTF8'](plaintext)
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plaintext_length = lengthBytesUTF8(plaintext)
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plaintext_buffer = malloc(plaintext_length + 1);
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Module['stringToUTF8'](plaintext, plaintext_buffer, plaintext_length + 1);
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stringToUTF8(plaintext, plaintext_buffer, plaintext_length + 1);
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var random_length = pk_encryption_method(
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Module['_olm_pk_encrypt_random_length']
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)();
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@ -50,7 +50,7 @@ PkEncryption.prototype['encrypt'] = restore_stack(function(
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Module['_olm_pk_mac_length']
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)(this.ptr);
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var mac_buffer = stack(mac_length + NULL_BYTE_PADDING_LENGTH);
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Module['setValue'](
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setValue(
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mac_buffer+mac_length,
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0, "i8"
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);
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@ -58,7 +58,7 @@ PkEncryption.prototype['encrypt'] = restore_stack(function(
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Module['_olm_pk_key_length']
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)();
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var ephemeral_buffer = stack(ephemeral_length + NULL_BYTE_PADDING_LENGTH);
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Module['setValue'](
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setValue(
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ephemeral_buffer+ephemeral_length,
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0, "i8"
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);
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@ -72,12 +72,12 @@ PkEncryption.prototype['encrypt'] = restore_stack(function(
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);
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// UTF8ToString requires a null-terminated argument, so add the
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// null terminator.
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Module['setValue'](
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setValue(
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ciphertext_buffer+ciphertext_length,
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0, "i8"
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);
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return {
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"ciphertext": Module['UTF8ToString'](ciphertext_buffer),
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"ciphertext": UTF8ToString(ciphertext_buffer),
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"mac": Pointer_stringify(mac_buffer),
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"ephemeral": Pointer_stringify(ephemeral_buffer)
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};
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@ -169,9 +169,9 @@ PkDecryption.prototype['decrypt'] = restore_stack(function (
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) {
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var plaintext_buffer, ciphertext_buffer, plaintext_max_length;
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try {
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ciphertext_length = Module['lengthBytesUTF8'](ciphertext)
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var ciphertext_length = lengthBytesUTF8(ciphertext)
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ciphertext_buffer = malloc(ciphertext_length + 1);
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Module['stringToUTF8'](ciphertext, ciphertext_buffer, ciphertext_length + 1);
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stringToUTF8(ciphertext, ciphertext_buffer, ciphertext_length + 1);
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var ephemeralkey_array = array_from_string(ephemeral_key);
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var ephemeralkey_buffer = stack(ephemeralkey_array);
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var mac_array = array_from_string(mac);
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@ -190,11 +190,11 @@ PkDecryption.prototype['decrypt'] = restore_stack(function (
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);
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// UTF8ToString requires a null-terminated argument, so add the
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// null terminator.
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Module['setValue'](
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setValue(
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plaintext_buffer+plaintext_length,
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0, "i8"
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);
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return Module['UTF8ToString'](plaintext_buffer);
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return UTF8ToString(plaintext_buffer);
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} finally {
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if (plaintext_buffer !== undefined) {
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// don't leave a copy of the plaintext in the heap.
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@ -1,27 +1,17 @@
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var runtime = Module['Runtime'];
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var malloc = Module['_malloc'];
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var free = Module['_free'];
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var Pointer_stringify = Module['Pointer_stringify'];
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var OLM_ERROR = Module['_olm_error']();
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/* The 'length' argument to Pointer_stringify doesn't work if the input
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* includes characters >= 128, which makes Pointer_stringify unreliable. We
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* could use it on strings which are known to be ascii, but that seems
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* dangerous. Instead we add a NULL character to all of our strings and just
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* use UTF8ToString.
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*/
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var NULL_BYTE_PADDING_LENGTH = 1;
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var OLM_ERROR;
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/* allocate a number of bytes of storage on the stack.
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*
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* If size_or_array is a Number, allocates that number of zero-initialised bytes.
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*/
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function stack(size_or_array) {
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return Module['allocate'](size_or_array, 'i8', Module['ALLOC_STACK']);
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return allocate(size_or_array, 'i8', Module['ALLOC_STACK']);
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}
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function array_from_string(string) {
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return Module['intArrayFromString'](string, true);
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return intArrayFromString(string, true);
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}
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function random_stack(size) {
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function restore_stack(wrapped) {
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return function() {
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var sp = runtime.stackSave();
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var sp = stackSave();
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try {
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return wrapped.apply(this, arguments);
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} finally {
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runtime.stackRestore(sp);
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stackRestore(sp);
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}
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}
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}
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@ -315,7 +305,7 @@ Session.prototype['encrypt'] = restore_stack(function(
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Module['_olm_encrypt_message_type']
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)(this.ptr);
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plaintext_length = Module['lengthBytesUTF8'](plaintext);
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plaintext_length = lengthBytesUTF8(plaintext);
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var message_length = session_method(
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Module['_olm_encrypt_message_length']
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)(this.ptr, plaintext_length);
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@ -325,7 +315,7 @@ Session.prototype['encrypt'] = restore_stack(function(
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// need to allow space for the terminator (which stringToUTF8 always
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// writes), hence + 1.
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plaintext_buffer = malloc(plaintext_length + 1);
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Module['stringToUTF8'](plaintext, plaintext_buffer, plaintext_length + 1);
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stringToUTF8(plaintext, plaintext_buffer, plaintext_length + 1);
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message_buffer = malloc(message_length + NULL_BYTE_PADDING_LENGTH);
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@ -338,14 +328,14 @@ Session.prototype['encrypt'] = restore_stack(function(
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// UTF8ToString requires a null-terminated argument, so add the
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// null terminator.
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Module['setValue'](
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setValue(
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message_buffer+message_length,
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0, "i8"
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);
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return {
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"type": message_type,
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"body": Module['UTF8ToString'](message_buffer),
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"body": UTF8ToString(message_buffer),
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};
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} finally {
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if (plaintext_buffer !== undefined) {
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|
@ -366,14 +356,14 @@ Session.prototype['decrypt'] = restore_stack(function(
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try {
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message_buffer = malloc(message.length);
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Module['writeAsciiToMemory'](message, message_buffer, true);
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writeAsciiToMemory(message, message_buffer, true);
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max_plaintext_length = session_method(
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Module['_olm_decrypt_max_plaintext_length']
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)(this.ptr, message_type, message_buffer, message.length);
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// caculating the length destroys the input buffer, so we need to re-copy it.
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Module['writeAsciiToMemory'](message, message_buffer, true);
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writeAsciiToMemory(message, message_buffer, true);
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plaintext_buffer = malloc(max_plaintext_length + NULL_BYTE_PADDING_LENGTH);
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|
@ -385,7 +375,7 @@ Session.prototype['decrypt'] = restore_stack(function(
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// UTF8ToString requires a null-terminated argument, so add the
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// null terminator.
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Module['setValue'](
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setValue(
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plaintext_buffer+plaintext_length,
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0, "i8"
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);
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|
@ -474,8 +464,6 @@ olm_exports["get_library_version"] = restore_stack(function() {
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];
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});
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})();
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// export the olm functions into the environment.
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//
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// make sure that we do this *after* populating olm_exports, so that we don't
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|
@ -483,7 +471,11 @@ olm_exports["get_library_version"] = restore_stack(function() {
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if (typeof module !== 'undefined' && module.exports) {
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// node / browserify
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module.exports = olm_exports;
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for (var olm_export in olm_exports) {
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if (olm_exports.hasOwnProperty(olm_export)) {
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Module[olm_export] = olm_exports[olm_export];
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}
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}
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}
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if (typeof(window) !== 'undefined') {
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|
@ -492,3 +484,7 @@ if (typeof(window) !== 'undefined') {
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// Olm in the global scope for browserified and webpacked apps.)
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window["Olm"] = olm_exports;
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}
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Module.then(function() {
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OLM_ERROR = Module['_olm_error']();
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});
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|
|
|
@ -1,10 +1,8 @@
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var olm_exports = {};
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var get_random_values;
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var process; // Shadow the process object so that emscripten won't get
|
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// confused by browserify
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|
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if (typeof(window) !== 'undefined') {
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// We've in a browser (directly, via browserify, or via webpack).
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// We're in a browser (directly, via browserify, or via webpack).
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get_random_values = function(buf) {
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window.crypto.getRandomValues(buf);
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};
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|
@ -12,7 +10,9 @@ if (typeof(window) !== 'undefined') {
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// We're running in node.
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var nodeCrypto = require("crypto");
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get_random_values = function(buf) {
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var bytes = nodeCrypto.randomBytes(buf.length);
|
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// [''] syntax needed here rather than '.' to prevent
|
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// closure compiler from mangling the import(!)
|
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var bytes = nodeCrypto['randomBytes'](buf.length);
|
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buf.set(bytes);
|
||||
};
|
||||
process = global["process"];
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|
@ -20,14 +20,23 @@ if (typeof(window) !== 'undefined') {
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throw new Error("Cannot find global to attach library to");
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}
|
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|
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(function() {
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||||
/* applications should define OLM_OPTIONS in the environment to override
|
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* emscripten module settings */
|
||||
var Module = {};
|
||||
if (typeof(OLM_OPTIONS) !== 'undefined') {
|
||||
for (var key in OLM_OPTIONS) {
|
||||
if (OLM_OPTIONS.hasOwnProperty(key)) {
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Module[key] = OLM_OPTIONS[key];
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||||
}
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||||
/* applications should define OLM_OPTIONS in the environment to override
|
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* emscripten module settings (we still need to (re) declare the variable
|
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* otherwise the closure compiler becomes sad).
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*/
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var OLM_OPTIONS;
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if (typeof(OLM_OPTIONS) !== 'undefined') {
|
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for (var olm_option_key in OLM_OPTIONS) {
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if (OLM_OPTIONS.hasOwnProperty(olm_option_key)) {
|
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Module[olm_option_key] = OLM_OPTIONS[olm_option_key];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* The 'length' argument to Pointer_stringify doesn't work if the input
|
||||
* includes characters >= 128, which makes Pointer_stringify unreliable. We
|
||||
* could use it on strings which are known to be ascii, but that seems
|
||||
* dangerous. Instead we add a NULL character to all of our strings and just
|
||||
* use UTF8ToString.
|
||||
*/
|
||||
var NULL_BYTE_PADDING_LENGTH = 1;
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||||
|
|
|
@ -16,12 +16,15 @@ limitations under the License.
|
|||
|
||||
"use strict";
|
||||
|
||||
var Olm = require('../olm');
|
||||
var Olm = require('../olm')();
|
||||
|
||||
describe("megolm", function() {
|
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var aliceSession, bobSession;
|
||||
|
||||
beforeEach(function() {
|
||||
beforeEach(function(done) {
|
||||
Olm.then(function() {
|
||||
done();
|
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});
|
||||
aliceSession = new Olm.OutboundGroupSession();
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bobSession = new Olm.InboundGroupSession();
|
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});
|
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|
|
|
@ -16,7 +16,7 @@ limitations under the License.
|
|||
|
||||
"use strict";
|
||||
|
||||
var Olm = require('../olm');
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||||
var Olm = require('../olm')();
|
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|
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if (!Object.keys) {
|
||||
Object.keys = function(o) {
|
||||
|
@ -30,7 +30,13 @@ describe("olm", function() {
|
|||
var aliceAccount, bobAccount;
|
||||
var aliceSession, bobSession;
|
||||
|
||||
beforeEach(function() {
|
||||
beforeEach(function(done) {
|
||||
// This should really be in a beforeAll, but jasmine-node
|
||||
// doesn't support that
|
||||
Olm.then(function() {
|
||||
done();
|
||||
});
|
||||
|
||||
aliceAccount = new Olm.Account();
|
||||
bobAccount = new Olm.Account();
|
||||
aliceSession = new Olm.Session();
|
||||
|
|
|
@ -16,7 +16,7 @@ limitations under the License.
|
|||
|
||||
"use strict";
|
||||
|
||||
var Olm = require('../olm');
|
||||
var Olm = require('../olm')();
|
||||
|
||||
if (!Object.keys) {
|
||||
Object.keys = function(o) {
|
||||
|
@ -29,7 +29,11 @@ if (!Object.keys) {
|
|||
describe("pk", function() {
|
||||
var encryption, decryption;
|
||||
|
||||
beforeEach(function() {
|
||||
beforeEach(function(done) {
|
||||
Olm.then(function() {
|
||||
done();
|
||||
});
|
||||
|
||||
encryption = new Olm.PkEncryption();
|
||||
decryption = new Olm.PkDecryption();
|
||||
});
|
||||
|
|
Loading…
Reference in a new issue