433 lines
11 KiB
TypeScript
433 lines
11 KiB
TypeScript
/*
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This file is part of TALER
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Copyright (C) 2014, 2015 Christian Grothoff (and other contributing authors)
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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"use strict";
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declare var Module : any;
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// Size of a native pointer.
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const PTR_SIZE = 4;
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let getEmsc = Module.cwrap;
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var emsc = {
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free: (ptr) => Module._free(ptr),
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get_value: getEmsc('TALER_WR_get_value',
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'number',
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['number']),
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get_fraction: getEmsc('TALER_WR_get_fraction',
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'number',
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['number']),
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get_currency: getEmsc('TALER_WR_get_currency',
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'string',
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['number']),
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amount_add: getEmsc('TALER_amount_add',
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'void',
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['number', 'number', 'number']),
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amount_subtract: getEmsc('TALER_amount_subtract',
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'void',
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['number', 'number', 'number']),
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amount_normalize: getEmsc('TALER_amount_normalize',
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'void',
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['number']),
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amount_cmp: getEmsc('TALER_amount_cmp',
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'number',
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['number', 'number']),
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amount_hton: getEmsc('TALER_amount_hton',
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'void',
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['number', 'number']),
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amount_ntoh: getEmsc('TALER_amount_ntoh',
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'void',
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['number', 'number']),
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hash: getEmsc('GNUNET_CRYPTO_hash',
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'void',
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['number', 'number', 'number']),
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memmove: getEmsc('memmove',
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'number',
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['number', 'number', 'number']),
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rsa_public_key_free: getEmsc('GNUNET_CRYPTO_rsa_public_key_free',
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'void',
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['number']),
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string_to_data: getEmsc('GNUNET_STRINGS_string_to_data',
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'void',
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['number', 'number', 'number', 'number'])
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};
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var emscAlloc = {
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get_amount: getEmsc('TALER_WRALL_get_amount',
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'number',
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['number', 'number', 'number', 'string']),
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eddsa_key_create: getEmsc('GNUNET_CRYPTO_eddsa_key_create',
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'number'),
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eddsa_public_key_from_private: getEmsc('TALER_WRALL_eddsa_public_key_from_private',
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'number',
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['number']),
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data_to_string_alloc: getEmsc('GNUNET_STRINGS_data_to_string_alloc',
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'number',
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['number', 'number']),
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purpose_create: getEmsc('TALER_WRALL_purpose_create',
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'number',
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['number', 'number', 'number']),
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rsa_blind: getEmsc('GNUNET_CRYPTO_rsa_blind',
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'number',
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['number', 'number', 'number', 'number']),
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rsa_blinding_key_create: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_create',
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'void',
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['number']),
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rsa_blinding_key_encode: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_encode',
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'void',
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['number', 'number']),
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rsa_blinding_key_decode: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_decode',
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'number',
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['number', 'number']),
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rsa_public_key_decode: getEmsc('GNUNET_CRYPTO_rsa_public_key_decode',
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'number',
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['number', 'number']),
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malloc: (size: number) => Module._malloc(size),
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};
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enum SignaturePurpose {
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}
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abstract class ArenaObject {
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nativePtr: number;
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arena: Arena;
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abstract destroy(): void;
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constructor(arena?: Arena) {
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this.nativePtr = 0;
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if (!arena)
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arena = defaultArena;
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arena.put(this);
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this.arena = arena;
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}
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}
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class Arena {
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heap: Array<ArenaObject>;
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constructor () {
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this.heap = [];
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}
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put(obj) {
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this.heap.push(obj);
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}
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destroy(obj) {
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// XXX: todo
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}
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}
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// Arena to track allocations that do not use an explicit arena.
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var defaultArena = new Arena();
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class Amount extends ArenaObject {
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constructor(args?: any, arena?: Arena) {
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super(arena);
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if (args) {
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this.nativePtr = emscAlloc.get_amount(args.value, 0, args.fraction, args.currency);
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} else {
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this.nativePtr = emscAlloc.get_amount(0, 0, 0, "");
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}
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}
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destroy() {
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if (this.nativePtr != 0) {
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emsc.free(this.nativePtr);
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}
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}
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toNbo(a?: Arena): AmountNbo {
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let x = new AmountNbo(null, a);
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emsc.amount_hton(x.nativePtr, this.nativePtr);
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return x;
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}
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fromNbo(nbo: AmountNbo): void {
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emsc.amount_ntoh(this.nativePtr, nbo.nativePtr);
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}
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get value() {
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return emsc.get_value(this.nativePtr);
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}
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get fraction() {
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return emsc.get_fraction(this.nativePtr);
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}
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get currency() {
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return emsc.get_currency(this.nativePtr);
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}
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toJson() {
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return {
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value: emsc.get_value(this.nativePtr),
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fraction: emsc.get_fraction(this.nativePtr),
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currency: emsc.get_currency(this.nativePtr)
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};
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}
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/**
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* Add an amount to this amount.
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*/
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add(a) {
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let res = emsc.amount_add(this.nativePtr, a.nativePtr, this.nativePtr);
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if (res < 1) {
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// Overflow
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return false;
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}
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return true;
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}
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/**
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* Perform saturating subtraction on amounts.
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*/
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sub(a) {
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let res = emsc.amount_subtract(this.nativePtr, a.nativePtr, this.nativePtr);
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if (res == 0) {
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// Underflow
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return false;
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}
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if (res > 0) {
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return true;
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}
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throw "Incompatible currencies";
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}
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cmp(a) {
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return emsc.amount_cmp(this.nativePtr, a.nativePtr);
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}
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normalize() {
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emsc.amount_normalize(this.nativePtr);
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}
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}
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abstract class PackedArenaObject extends ArenaObject {
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abstract size(): number;
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constructor(init?: number, a?: Arena) {
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super(a);
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if (init === null || init === undefined) {
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this.nativePtr = emscAlloc.malloc(this.size());
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} else {
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this.nativePtr = init;
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}
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}
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encode(): string {
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var d = emscAlloc.data_to_string_alloc(this.nativePtr, this.size());
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var s = Module.Pointer_stringify(d);
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emsc.free(d);
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return s;
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}
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decode(s: string) {
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// We need to get the javascript string
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// to the emscripten heap first.
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// XXX: Does this work with multi-bytes code points?
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let hstr = emscAlloc.malloc(s.length + 1);
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Module.writeStringToMemory(s, hstr);
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let res = emsc.string_to_data(hstr, s.length, this.nativePtr, this.size());
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if (res < 1) {
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throw {error: "wrong encoding"};
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}
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}
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destroy() {
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emsc.free(this.nativePtr);
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this.nativePtr = 0;
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}
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hash(): HashCode {
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var x = new HashCode();
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emsc.hash(this.nativePtr, this.size(), x.nativePtr);
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return x;
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}
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}
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class AmountNbo extends PackedArenaObject {
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size() { return 24; }
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}
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class EddsaPrivateKey extends PackedArenaObject {
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static create(a?: Arena): EddsaPrivateKey {
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let p = emscAlloc.eddsa_key_create();
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return new EddsaPrivateKey(p, a);
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}
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size() { return 32; }
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getPublicKey(): EddsaPublicKey {
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let p = emscAlloc.eddsa_public_key_from_private(this.nativePtr);
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return new EddsaPublicKey(p, this.arena);
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}
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}
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class EddsaPublicKey extends PackedArenaObject {
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size() { return 32; }
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}
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class RsaBlindingKey extends ArenaObject {
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static create(len: number, a?: Arena) {
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let o = new RsaBlindingKey(a);
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o.nativePtr = emscAlloc.rsa_blinding_key_create(len);
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return o;
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}
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encode(): string {
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let ptr = emscAlloc.malloc(PTR_SIZE);
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let size = emscAlloc.rsa_blinding_key_encode(this.nativePtr, ptr);
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let res = new ByteArray(size, Module.getValue(ptr, '*'));
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let s = res.encode();
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emsc.free(ptr);
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res.destroy();
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return s;
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}
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destroy() {
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// TODO
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}
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}
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class HashCode extends PackedArenaObject {
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size() { return 64; }
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}
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class ByteArray extends PackedArenaObject {
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private allocatedSize: number;
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size() { return this.allocatedSize; }
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constructor(desiredSize: number, init: number, a?: Arena) {
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super(init, a);
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if (init === undefined || init === null) {
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this.nativePtr = emscAlloc.malloc(desiredSize);
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} else {
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this.nativePtr = init;
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}
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this.allocatedSize = desiredSize;
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}
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}
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class EccSignaturePurpose extends PackedArenaObject {
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size() { return this.payload.size() + 8; }
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payload: PackedArenaObject;
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constructor(purpose: SignaturePurpose, payload: PackedArenaObject, a?: Arena) {
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this.payload = payload;
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let p = emscAlloc.purpose_create(purpose, payload.nativePtr, payload.size());
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super(p, a);
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}
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}
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abstract class SignatureStruct {
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abstract fieldTypes(): Array<any>;
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abstract purpose(): SignaturePurpose;
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private members: any = {};
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toPurpose(a?: Arena): EccSignaturePurpose {
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let totalSize = 0;
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for (let f of this.fieldTypes()) {
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let name = f[0];
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let member = this.members[name];
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if (!member) {
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throw {error: "Member not set", key: name};
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}
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totalSize += this.members[name].size();
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}
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let buf = emscAlloc.malloc(totalSize);
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let ptr = buf;
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for (let f of this.fieldTypes()) {
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let name = f[0];
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let member = this.members[name];
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let size = member.size();
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emsc.memmove(ptr, member.nativePtr, size);
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ptr += size;
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}
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let ba = new ByteArray(totalSize, buf, a);
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let x = new EccSignaturePurpose(this.purpose(), ba, a);
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return x;
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}
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set(name: string, value: any) {
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let typemap: any = {}
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for (let f of this.fieldTypes()) {
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typemap[f[0]] = f[1];
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}
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if (!(name in typemap)) {
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throw {error: "Key not found", key: name};
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}
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if (!(value instanceof typemap[name])) {
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throw {error: "Wrong type", key: name};
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}
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// TODO: check type!
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this.members[name] = value;
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}
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}
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class WithdrawRequestPS extends SignatureStruct {
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purpose() { return undefined; }
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fieldTypes() {
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return [
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["reserve_pub", EddsaPublicKey],
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["amount_with_fee", Amount],
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["withdraw_fee", Amount],
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["h_denomination_pub", HashCode],
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["h_coin_envelope", HashCode]];
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}
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}
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class RsaPublicKey extends ArenaObject {
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static decode(s: string, a?: Arena): RsaPublicKey {
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let obj = new RsaPublicKey(a);
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let hstr = emscAlloc.malloc(s.length + 1);
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Module.writeStringToMemory(s, hstr);
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obj.nativePtr = emscAlloc.rsa_public_key_decode(hstr, s.length);
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emsc.free(hstr);
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return obj;
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}
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destroy() {
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emsc.rsa_public_key_free(this.nativePtr);
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this.nativePtr = 0;
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}
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}
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function rsaBlind(hashCode: HashCode,
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blindingKey: RsaBlindingKey,
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pkey: RsaPublicKey,
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arena?: Arena): ByteArray
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{
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let ptr = emscAlloc.malloc(PTR_SIZE);
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let s = emscAlloc.rsa_blind(hashCode.nativePtr, blindingKey.nativePtr, pkey.nativePtr, ptr);
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let res = new ByteArray(s, Module.getValue(ptr, '*'), arena);
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return res;
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}
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