456 lines
15 KiB
JavaScript
456 lines
15 KiB
JavaScript
/*
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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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// Size of a native pointer.
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const PTR_SIZE = 4;
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const GNUNET_OK = 1;
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const GNUNET_YES = 1;
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const GNUNET_NO = 0;
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const GNUNET_SYSERR = -1;
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let getEmsc = (...args) => Module.cwrap.apply(null, args);
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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', 'number', ['number']),
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get_fraction: getEmsc('TALER_WR_get_fraction', 'number', ['number']),
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get_currency: getEmsc('TALER_WR_get_currency', 'string', ['number']),
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amount_add: getEmsc('TALER_amount_add', 'number', ['number', 'number', 'number']),
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amount_subtract: getEmsc('TALER_amount_subtract', 'number', ['number', 'number', 'number']),
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amount_normalize: getEmsc('TALER_amount_normalize', 'void', ['number']),
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amount_cmp: getEmsc('TALER_amount_cmp', 'number', ['number', 'number']),
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amount_hton: getEmsc('TALER_amount_hton', 'void', ['number', 'number']),
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amount_ntoh: getEmsc('TALER_amount_ntoh', 'void', ['number', 'number']),
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hash: getEmsc('GNUNET_CRYPTO_hash', 'void', ['number', 'number', 'number']),
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memmove: getEmsc('memmove', 'number', ['number', 'number', 'number']),
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rsa_public_key_free: getEmsc('GNUNET_CRYPTO_rsa_public_key_free', 'void', ['number']),
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rsa_signature_free: getEmsc('GNUNET_CRYPTO_rsa_signature_free', 'void', ['number']),
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string_to_data: getEmsc('GNUNET_STRINGS_string_to_data', 'number', ['number', 'number', 'number', 'number']),
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eddsa_sign: getEmsc('GNUNET_CRYPTO_eddsa_sign', 'number', ['number', 'number', 'number']),
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hash_create_random: getEmsc('GNUNET_CRYPTO_hash_create_random', 'void', ['number', 'number']),
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rsa_blinding_key_destroy: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_free', 'void', ['number']),
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};
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var emscAlloc = {
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get_amount: getEmsc('TALER_WRALL_get_amount', 'number', ['number', 'number', 'number', 'string']),
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eddsa_key_create: getEmsc('GNUNET_CRYPTO_eddsa_key_create', 'number', []),
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eddsa_public_key_from_private: getEmsc('TALER_WRALL_eddsa_public_key_from_private', 'number', ['number']),
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data_to_string_alloc: getEmsc('GNUNET_STRINGS_data_to_string_alloc', 'number', ['number', 'number']),
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purpose_create: getEmsc('TALER_WRALL_purpose_create', 'number', ['number', 'number', 'number']),
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rsa_blind: getEmsc('GNUNET_CRYPTO_rsa_blind', 'number', ['number', 'number', 'number', 'number']),
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rsa_blinding_key_create: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_create', 'number', ['number']),
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rsa_blinding_key_encode: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_encode', 'number', ['number', 'number']),
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rsa_signature_encode: getEmsc('GNUNET_CRYPTO_rsa_signature_encode', 'number', ['number', 'number']),
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rsa_blinding_key_decode: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_decode', 'number', ['number', 'number']),
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rsa_public_key_decode: getEmsc('GNUNET_CRYPTO_rsa_public_key_decode', 'number', ['number', 'number']),
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rsa_signature_decode: getEmsc('GNUNET_CRYPTO_rsa_signature_decode', 'number', ['number', 'number']),
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rsa_public_key_encode: getEmsc('GNUNET_CRYPTO_rsa_public_key_encode', 'number', ['number', 'number']),
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malloc: (size) => Module._malloc(size),
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};
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var SignaturePurpose;
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(function (SignaturePurpose) {
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SignaturePurpose[SignaturePurpose["RESERVE_WITHDRAW"] = 1200] = "RESERVE_WITHDRAW";
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})(SignaturePurpose || (SignaturePurpose = {}));
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var RandomQuality;
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(function (RandomQuality) {
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RandomQuality[RandomQuality["WEAK"] = 0] = "WEAK";
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RandomQuality[RandomQuality["STRONG"] = 1] = "STRONG";
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RandomQuality[RandomQuality["NONCE"] = 2] = "NONCE";
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})(RandomQuality || (RandomQuality = {}));
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class ArenaObject {
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constructor(arena) {
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this.nativePtr = null;
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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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getNative() {
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// We want to allow latent allocation
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// of native wrappers, but we never want to
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// pass 'undefined' to emscripten.
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if (this._nativePtr === undefined) {
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throw Error("Native pointer not initialized");
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}
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return this._nativePtr;
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}
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free() {
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if (this.nativePtr !== undefined) {
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emsc.free(this.nativePtr);
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this.nativePtr = undefined;
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}
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}
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alloc(size) {
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if (this.nativePtr !== undefined) {
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throw Error("Double allocation");
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}
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this.nativePtr = emscAlloc.malloc(size);
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}
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setNative(n) {
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if (n === undefined) {
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throw Error("Native pointer must be a number or null");
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}
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this._nativePtr = n;
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}
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set nativePtr(v) {
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this.setNative(v);
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}
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get nativePtr() {
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return this.getNative();
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}
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}
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class Arena {
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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() {
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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, 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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}
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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) {
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let x = new AmountNbo(a);
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x.alloc();
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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) {
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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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// this = this - a
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let res = emsc.amount_subtract(this.nativePtr, this.nativePtr, a.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 Error("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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class PackedArenaObject extends ArenaObject {
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constructor(a) {
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super(a);
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}
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toCrock() {
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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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loadCrock(s) {
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this.alloc();
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// We need to get the javascript string
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// to the emscripten heap first.
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let buf = ByteArray.fromString(s);
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let res = emsc.string_to_data(buf.nativePtr, s.length, this.nativePtr, this.size());
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buf.destroy();
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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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alloc() {
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if (this.nativePtr === null) {
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this.nativePtr = emscAlloc.malloc(this.size());
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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() {
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var x = new HashCode();
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x.alloc();
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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) {
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let obj = new EddsaPrivateKey(a);
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obj.nativePtr = emscAlloc.eddsa_key_create();
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return obj;
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}
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size() { return 32; }
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getPublicKey(a) {
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let obj = new EddsaPublicKey(a);
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obj.nativePtr = emscAlloc.eddsa_public_key_from_private(this.nativePtr);
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return obj;
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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, a) {
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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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toCrock() {
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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.toCrock();
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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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random(qualStr) {
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let qual;
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switch (qualStr) {
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case "weak":
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qual = RandomQuality.WEAK;
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break;
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case "strong":
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case null:
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case undefined:
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qual = RandomQuality.STRONG;
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break;
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case "nonce":
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qual = RandomQuality.NONCE;
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break;
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break;
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default:
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throw Error(format("unknown crypto quality: {0}", qual));
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}
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this.alloc();
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emsc.hash_create_random(qual, this.nativePtr);
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}
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}
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class ByteArray extends PackedArenaObject {
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constructor(desiredSize, init, a) {
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super(a);
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if (init === undefined || init === null) {
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this.nativePtr = emscAlloc.malloc(desiredSize);
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}
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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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size() { return this.allocatedSize; }
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static fromString(s, a) {
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let hstr = emscAlloc.malloc(s.length + 1);
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Module.writeStringToMemory(s, hstr);
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return new ByteArray(s.length, hstr, a);
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}
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static fromCrock(s, a) {
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let hstr = emscAlloc.malloc(s.length + 1);
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Module.writeStringToMemory(s, hstr);
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let decodedLen = Math.floor((s.length * 5) / 8);
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let ba = new ByteArray(decodedLen, null, a);
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let res = emsc.string_to_data(hstr, s.length, ba.nativePtr, decodedLen);
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emsc.free(hstr);
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if (res != GNUNET_OK) {
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throw Error("decoding failed");
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}
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return ba;
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}
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}
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class EccSignaturePurpose extends PackedArenaObject {
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constructor(purpose, payload, a) {
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super(a);
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this.nativePtr = emscAlloc.purpose_create(purpose, payload.nativePtr, payload.size());
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this.payloadSize = payload.size();
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}
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size() { return this.payloadSize + 8; }
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}
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class SignatureStruct {
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constructor() {
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this.members = {};
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}
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toPurpose(a) {
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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(format("Member {0} not set", name));
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}
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totalSize += member.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);
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return x;
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}
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set(name, value) {
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let typemap = {};
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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(format("Key {0} not found", name));
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}
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if (!(value instanceof typemap[name])) {
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throw Error(format("Wrong type for {0}", name));
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}
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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 SignaturePurpose.RESERVE_WITHDRAW; }
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fieldTypes() {
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return [
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["reserve_pub", EddsaPublicKey],
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["amount_with_fee", AmountNbo],
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["withdraw_fee", AmountNbo],
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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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function encodeWith(obj, fn, arena) {
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let ptr = emscAlloc.malloc(PTR_SIZE);
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let len = fn(obj.getNative(), ptr);
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let res = new ByteArray(len, null, arena);
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res.setNative(Module.getValue(ptr, '*'));
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emsc.free(ptr);
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return res;
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}
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class RsaPublicKey extends ArenaObject {
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static fromCrock(s, a) {
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let obj = new RsaPublicKey(a);
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let buf = ByteArray.fromCrock(s);
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obj.nativePtr = emscAlloc.rsa_public_key_decode(buf.nativePtr, buf.size());
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buf.destroy();
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return obj;
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}
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toCrock() {
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return this.encode().toCrock();
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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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encode(arena) {
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let ptr = emscAlloc.malloc(PTR_SIZE);
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let len = emscAlloc.rsa_public_key_encode(this.nativePtr, ptr);
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let res = new ByteArray(len, Module.getValue(ptr, '*'), arena);
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emsc.free(ptr);
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return res;
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}
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}
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class EddsaSignature extends PackedArenaObject {
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size() { return 64; }
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}
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class RsaSignature extends ArenaObject {
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static fromCrock(s, a) {
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let obj = new this(a);
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let buf = ByteArray.fromCrock(s);
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obj.setNative(emscAlloc.rsa_signature_decode(buf.getNative(), buf.size()));
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buf.destroy();
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return obj;
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}
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encode(arena) {
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return encodeWith(this, emscAlloc.rsa_signature_encode);
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}
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destroy() {
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emsc.rsa_signature_free(this.getNative());
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this.setNative(0);
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}
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}
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function rsaBlind(hashCode, blindingKey, pkey, arena) {
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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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function eddsaSign(purpose, priv, a) {
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let sig = new EddsaSignature(a);
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sig.alloc();
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let res = emsc.eddsa_sign(priv.nativePtr, purpose.nativePtr, sig.nativePtr);
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if (res < 1) {
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throw Error("EdDSA signing failed");
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}
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return sig;
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}
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function rsaUnblind(sig, bk, pk) {
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throw Error("Not implemented");
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}
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