99 lines
3.5 KiB
JavaScript
99 lines
3.5 KiB
JavaScript
function SAS() {
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var size = Module['_olm_sas_size']();
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var random_length = Module['_olm_create_sas_random_length']();
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var random = random_stack(random_length);
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this.buf = malloc(size);
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this.ptr = Module['_olm_sas'](this.buf);
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Module['_olm_create_sas'](this.ptr, random, random_length);
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bzero(random, random_length);
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}
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function sas_method(wrapped) {
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return function() {
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var result = wrapped.apply(this, arguments);
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if (result === OLM_ERROR) {
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var message = UTF8ToString(
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Module['_olm_sas_last_error'](arguments[0])
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);
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throw new Error("OLM." + message);
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}
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return result;
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}
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}
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SAS.prototype['free'] = function() {
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Module['_olm_clear_sas'](this.ptr);
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free(this.ptr);
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};
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SAS.prototype['get_pubkey'] = restore_stack(function() {
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var pubkey_length = sas_method(Module['_olm_sas_pubkey_length'])(this.ptr);
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var pubkey_buffer = stack(pubkey_length + NULL_BYTE_PADDING_LENGTH);
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sas_method(Module['_olm_sas_get_pubkey'])(this.ptr, pubkey_buffer, pubkey_length);
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return UTF8ToString(pubkey_buffer, pubkey_length);
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});
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SAS.prototype['set_their_key'] = restore_stack(function(their_key) {
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var their_key_array = array_from_string(their_key);
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var their_key_buffer = stack(their_key_array);
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sas_method(Module['_olm_sas_set_their_key'])(
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this.ptr,
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their_key_buffer, their_key_array.length
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);
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});
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SAS.prototype['is_their_key_set'] = restore_stack(function() {
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return sas_method(Module['_olm_sas_is_their_key_set'])(
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this.ptr
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) ? true : false;
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});
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SAS.prototype['generate_bytes'] = restore_stack(function(info, length) {
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var info_array = array_from_string(info);
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var info_buffer = stack(info_array);
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var output_buffer = stack(length);
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sas_method(Module['_olm_sas_generate_bytes'])(
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this.ptr,
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info_buffer, info_array.length,
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output_buffer, length
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);
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// The inner Uint8Array creates a view of the buffer. The outer Uint8Array
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// copies it to a new array to return, since the original buffer will get
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// deallocated from the stack and could get overwritten.
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var output_arr = new Uint8Array(
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new Uint8Array(Module['HEAPU8'].buffer, output_buffer, length)
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);
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return output_arr;
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});
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SAS.prototype['calculate_mac'] = restore_stack(function(input, info) {
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var input_array = array_from_string(input);
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var input_buffer = stack(input_array);
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var info_array = array_from_string(info);
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var info_buffer = stack(info_array);
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var mac_length = sas_method(Module['_olm_sas_mac_length'])(this.ptr);
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var mac_buffer = stack(mac_length + NULL_BYTE_PADDING_LENGTH);
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sas_method(Module['_olm_sas_calculate_mac'])(
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this.ptr,
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input_buffer, input_array.length,
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info_buffer, info_array.length,
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mac_buffer, mac_length
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);
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return UTF8ToString(mac_buffer, mac_length);
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});
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SAS.prototype['calculate_mac_long_kdf'] = restore_stack(function(input, info) {
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var input_array = array_from_string(input);
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var input_buffer = stack(input_array);
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var info_array = array_from_string(info);
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var info_buffer = stack(info_array);
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var mac_length = sas_method(Module['_olm_sas_mac_length'])(this.ptr);
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var mac_buffer = stack(mac_length + NULL_BYTE_PADDING_LENGTH);
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sas_method(Module['_olm_sas_calculate_mac_long_kdf'])(
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this.ptr,
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input_buffer, input_array.length,
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info_buffer, info_array.length,
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mac_buffer, mac_length
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);
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return UTF8ToString(mac_buffer, mac_length);
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});
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