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Diffstat (limited to 'extension/lib/wallet/emscriptif.ts')
| -rw-r--r-- | extension/lib/wallet/emscriptif.ts | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/extension/lib/wallet/emscriptif.ts b/extension/lib/wallet/emscriptif.ts new file mode 100644 index 000000000..d8fd72289 --- /dev/null +++ b/extension/lib/wallet/emscriptif.ts @@ -0,0 +1,938 @@ +/* + This file is part of TALER + (C) 2015 GNUnet e.V. + + TALER is free software; you can redistribute it and/or modify it under the + terms of the GNU General Public License as published by the Free Software + Foundation; either version 3, or (at your option) any later version. + + TALER is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with + TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/> + */ + +import {AmountJson_interface} from "./types"; +import * as EmscWrapper from "../emscripten/emsc"; + +/** + * High-level interface to emscripten-compiled modules used + * by the wallet. + * @module EmscriptIf + * @author Florian Dold + */ + +"use strict"; + +// Size of a native pointer. +const PTR_SIZE = 4; + +const GNUNET_OK = 1; +const GNUNET_YES = 1; +const GNUNET_NO = 0; +const GNUNET_SYSERR = -1; + +let Module = EmscWrapper.Module; + +let getEmsc: EmscWrapper.EmscFunGen = (...args) => Module.cwrap.apply(null, args); + +var emsc = { + free: (ptr) => Module._free(ptr), + get_value: getEmsc('TALER_WR_get_value', + 'number', + ['number']), + get_fraction: getEmsc('TALER_WR_get_fraction', + 'number', + ['number']), + get_currency: getEmsc('TALER_WR_get_currency', + 'string', + ['number']), + amount_add: getEmsc('TALER_amount_add', + 'number', + ['number', 'number', 'number']), + amount_subtract: getEmsc('TALER_amount_subtract', + 'number', + ['number', 'number', 'number']), + amount_normalize: getEmsc('TALER_amount_normalize', + 'void', + ['number']), + amount_get_zero: getEmsc('TALER_amount_get_zero', + 'number', + ['string', 'number']), + amount_cmp: getEmsc('TALER_amount_cmp', + 'number', + ['number', 'number']), + amount_hton: getEmsc('TALER_amount_hton', + 'void', + ['number', 'number']), + amount_ntoh: getEmsc('TALER_amount_ntoh', + 'void', + ['number', 'number']), + hash: getEmsc('GNUNET_CRYPTO_hash', + 'void', + ['number', 'number', 'number']), + memmove: getEmsc('memmove', + 'number', + ['number', 'number', 'number']), + rsa_public_key_free: getEmsc('GNUNET_CRYPTO_rsa_public_key_free', + 'void', + ['number']), + rsa_signature_free: getEmsc('GNUNET_CRYPTO_rsa_signature_free', + 'void', + ['number']), + string_to_data: getEmsc('GNUNET_STRINGS_string_to_data', + 'number', + ['number', 'number', 'number', 'number']), + eddsa_sign: getEmsc('GNUNET_CRYPTO_eddsa_sign', + 'number', + ['number', 'number', 'number']), + hash_create_random: getEmsc('GNUNET_CRYPTO_hash_create_random', + 'void', + ['number', 'number']), + rsa_blinding_key_destroy: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_free', + 'void', + ['number']), +}; + +var emscAlloc = { + get_amount: getEmsc('TALER_WRALL_get_amount', + 'number', + ['number', 'number', 'number', 'string']), + eddsa_key_create: getEmsc('GNUNET_CRYPTO_eddsa_key_create', + 'number', []), + eddsa_public_key_from_private: getEmsc( + 'TALER_WRALL_eddsa_public_key_from_private', + 'number', + ['number']), + data_to_string_alloc: getEmsc('GNUNET_STRINGS_data_to_string_alloc', + 'number', + ['number', 'number']), + purpose_create: getEmsc('TALER_WRALL_purpose_create', + 'number', + ['number', 'number', 'number']), + rsa_blind: getEmsc('GNUNET_CRYPTO_rsa_blind', + 'number', + ['number', 'number', 'number', 'number']), + rsa_blinding_key_create: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_create', + 'number', + ['number']), + rsa_blinding_key_encode: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_encode', + 'number', + ['number', 'number']), + rsa_signature_encode: getEmsc('GNUNET_CRYPTO_rsa_signature_encode', + 'number', + ['number', 'number']), + rsa_blinding_key_decode: getEmsc('GNUNET_CRYPTO_rsa_blinding_key_decode', + 'number', + ['number', 'number']), + rsa_public_key_decode: getEmsc('GNUNET_CRYPTO_rsa_public_key_decode', + 'number', + ['number', 'number']), + rsa_signature_decode: getEmsc('GNUNET_CRYPTO_rsa_signature_decode', + 'number', + ['number', 'number']), + rsa_public_key_encode: getEmsc('GNUNET_CRYPTO_rsa_public_key_encode', + 'number', + ['number', 'number']), + rsa_unblind: getEmsc('GNUNET_CRYPTO_rsa_unblind', + 'number', + ['number', 'number', 'number']), + malloc: (size: number) => Module._malloc(size), +}; + + +enum SignaturePurpose { + RESERVE_WITHDRAW = 1200, + WALLET_COIN_DEPOSIT = 1201, +} + +enum RandomQuality { + WEAK = 0, + STRONG = 1, + NONCE = 2 +} + + +abstract class ArenaObject { + private _nativePtr: number; + arena: Arena; + + abstract destroy(): void; + + constructor(arena?: Arena) { + this.nativePtr = null; + if (!arena) { + if (arenaStack.length == 0) { + throw Error("No arena available") + } + arena = arenaStack[arenaStack.length - 1]; + } + arena.put(this); + this.arena = arena; + } + + getNative(): number { + // We want to allow latent allocation + // of native wrappers, but we never want to + // pass 'undefined' to emscripten. + if (this._nativePtr === undefined) { + throw Error("Native pointer not initialized"); + } + return this._nativePtr; + } + + free() { + if (this.nativePtr !== undefined) { + emsc.free(this.nativePtr); + this.nativePtr = undefined; + } + } + + alloc(size: number) { + if (this.nativePtr !== undefined) { + throw Error("Double allocation"); + } + this.nativePtr = emscAlloc.malloc(size); + } + + setNative(n: number) { + if (n === undefined) { + throw Error("Native pointer must be a number or null"); + } + this._nativePtr = n; + } + + set nativePtr(v) { + this.setNative(v); + } + + get nativePtr() { + return this.getNative(); + } + +} + +interface Arena { + put(obj: ArenaObject): void; + destroy(): void; +} + +class DefaultArena implements Arena { + heap: Array<ArenaObject>; + + constructor() { + this.heap = []; + } + + put(obj) { + this.heap.push(obj); + } + + destroy() { + for (let obj of this.heap) { + obj.destroy(); + } + this.heap = [] + } +} + + +function mySetTimeout(ms: number, fn: () => void) { + // We need to use different timeouts, depending on whether + // we run in node or a web extension + if ("function" === typeof setTimeout) { + setTimeout(fn, ms); + } else { + chrome.extension.getBackgroundPage().setTimeout(fn, ms); + } +} + + +/** + * Arena that destroys all its objects once control has returned to the message + * loop and a small interval has passed. + */ +class SyncArena extends DefaultArena { + private isScheduled: boolean; + + constructor() { + super(); + } + + pub(obj) { + super.put(obj); + if (!this.isScheduled) { + this.schedule(); + } + this.heap.push(obj); + } + + destroy() { + super.destroy(); + } + + private schedule() { + this.isScheduled = true; + mySetTimeout(50, () => { + this.isScheduled = false; + this.destroy(); + }); + } +} + +let arenaStack: Arena[] = []; +arenaStack.push(new SyncArena()); + + +export class Amount extends ArenaObject { + constructor(args?: AmountJson_interface, arena?: Arena) { + super(arena); + if (args) { + this.nativePtr = emscAlloc.get_amount(args.value, + 0, + args.fraction, + args.currency); + } else { + this.nativePtr = emscAlloc.get_amount(0, 0, 0, ""); + } + } + + destroy() { + if (this.nativePtr != 0) { + emsc.free(this.nativePtr); + } + } + + + static getZero(currency: string, a?: Arena): Amount { + let am = new Amount(null, a); + let r = emsc.amount_get_zero(currency, am.getNative()); + if (r != GNUNET_OK) { + throw Error("invalid currency"); + } + return am; + } + + + toNbo(a?: Arena): AmountNbo { + let x = new AmountNbo(a); + x.alloc(); + emsc.amount_hton(x.nativePtr, this.nativePtr); + return x; + } + + fromNbo(nbo: AmountNbo): void { + emsc.amount_ntoh(this.nativePtr, nbo.nativePtr); + } + + get value() { + return emsc.get_value(this.nativePtr); + } + + get fraction() { + return emsc.get_fraction(this.nativePtr); + } + + get currency() { + return emsc.get_currency(this.nativePtr); + } + + toJson() { + return { + value: emsc.get_value(this.nativePtr), + fraction: emsc.get_fraction(this.nativePtr), + currency: emsc.get_currency(this.nativePtr) + }; + } + + /** + * Add an amount to this amount. + */ + add(a) { + let res = emsc.amount_add(this.nativePtr, a.nativePtr, this.nativePtr); + if (res < 1) { + // Overflow + return false; + } + return true; + } + + /** + * Perform saturating subtraction on amounts. + */ + sub(a) { + // this = this - a + let res = emsc.amount_subtract(this.nativePtr, this.nativePtr, a.nativePtr); + if (res == 0) { + // Underflow + return false; + } + if (res > 0) { + return true; + } + throw Error("Incompatible currencies"); + } + + cmp(a) { + return emsc.amount_cmp(this.nativePtr, a.nativePtr); + } + + normalize() { + emsc.amount_normalize(this.nativePtr); + } +} + + +abstract class PackedArenaObject extends ArenaObject { + abstract size(): number; + + constructor(a?: Arena) { + super(a); + } + + toCrock(): string { + var d = emscAlloc.data_to_string_alloc(this.nativePtr, this.size()); + var s = Module.Pointer_stringify(d); + emsc.free(d); + return s; + } + + toJson(): any { + // Per default, the json encoding of + // packed arena objects is just the crockford encoding. + // Subclasses typically want to override this. + return this.toCrock(); + } + + loadCrock(s: string) { + this.alloc(); + // We need to get the javascript string + // to the emscripten heap first. + let buf = ByteArray.fromString(s); + let res = emsc.string_to_data(buf.nativePtr, + s.length, + this.nativePtr, + this.size()); + buf.destroy(); + if (res < 1) { + throw {error: "wrong encoding"}; + } + } + + alloc() { + if (this.nativePtr === null) { + this.nativePtr = emscAlloc.malloc(this.size()); + } + } + + destroy() { + emsc.free(this.nativePtr); + this.nativePtr = 0; + } + + hash(): HashCode { + var x = new HashCode(); + x.alloc(); + emsc.hash(this.nativePtr, this.size(), x.nativePtr); + return x; + } + + hexdump() { + let bytes: string[] = []; + for (let i = 0; i < this.size(); i++) { + let b = Module.getValue(this.getNative() + i, "i8"); + b = (b + 256) % 256; + bytes.push("0".concat(b.toString(16)).slice(-2)); + } + let lines = []; + for (let i = 0; i < bytes.length; i+=8) { + lines.push(bytes.slice(i, i+8).join(",")); + } + return lines.join("\n"); + } +} + + +export class AmountNbo extends PackedArenaObject { + size() { + return 24; + } + toJson(): any { + let a = new DefaultArena(); + let am = new Amount(null, a); + am.fromNbo(this); + let json = am.toJson(); + a.destroy(); + return json; + } +} + + +export class EddsaPrivateKey extends PackedArenaObject { + static create(a?: Arena): EddsaPrivateKey { + let obj = new EddsaPrivateKey(a); + obj.nativePtr = emscAlloc.eddsa_key_create(); + return obj; + } + + size() { + return 32; + } + + getPublicKey(a?: Arena): EddsaPublicKey { + let obj = new EddsaPublicKey(a); + obj.nativePtr = emscAlloc.eddsa_public_key_from_private(this.nativePtr); + return obj; + } + + static fromCrock: (string) => EddsaPrivateKey; +} +mixinStatic(EddsaPrivateKey, fromCrock); + + +function fromCrock(s: string) { + let x = new this(); + x.alloc(); + x.loadCrock(s); + return x; +} + + +function mixin(obj, method, name?: string) { + if (!name) { + name = method.name; + } + if (!name) { + throw Error("Mixin needs a name."); + } + obj.prototype[method.name] = method; +} + + +function mixinStatic(obj, method, name?: string) { + if (!name) { + name = method.name; + } + if (!name) { + throw Error("Mixin needs a name."); + } + obj[method.name] = method; +} + + +export class EddsaPublicKey extends PackedArenaObject { + size() { + return 32; + } + static fromCrock: (s: string) => EddsaPublicKey; +} +mixinStatic(EddsaPublicKey, fromCrock); + +function makeFromCrock(decodeFn: (p: number, s: number) => number) { + function fromCrock(s: string, a?: Arena) { + let obj = new this(a); + let buf = ByteArray.fromCrock(s); + obj.setNative(decodeFn(buf.getNative(), + buf.size())); + buf.destroy(); + return obj; + } + + return fromCrock; +} + +function makeToCrock(encodeFn: (po: number, ps: number) => number): () => string { + function toCrock() { + let ptr = emscAlloc.malloc(PTR_SIZE); + let size = emscAlloc.rsa_blinding_key_encode(this.nativePtr, ptr); + let res = new ByteArray(size, Module.getValue(ptr, '*')); + let s = res.toCrock(); + emsc.free(ptr); + res.destroy(); + return s; + } + return toCrock; +} + +export class RsaBlindingKey extends ArenaObject { + static create(len: number, a?: Arena) { + let o = new RsaBlindingKey(a); + o.nativePtr = emscAlloc.rsa_blinding_key_create(len); + return o; + } + + static fromCrock: (s: string, a?: Arena) => RsaBlindingKey; + toCrock = makeToCrock(emscAlloc.rsa_blinding_key_encode); + + destroy() { + // TODO + } +} +mixinStatic(RsaBlindingKey, makeFromCrock(emscAlloc.rsa_blinding_key_decode)); + + +export class HashCode extends PackedArenaObject { + size() { + return 64; + } + + static fromCrock: (s: string) => HashCode; + + random(qualStr: string) { + let qual: RandomQuality; + switch (qualStr) { + case "weak": + qual = RandomQuality.WEAK; + break; + case "strong": + case null: + case undefined: + qual = RandomQuality.STRONG; + break; + case "nonce": + qual = RandomQuality.NONCE; + break; + default: + throw Error(format("unknown crypto quality: {0}", qual)); + } + this.alloc(); + emsc.hash_create_random(qual, this.nativePtr); + } +} +mixinStatic(HashCode, fromCrock); + + +export class ByteArray extends PackedArenaObject { + private allocatedSize: number; + + size() { + return this.allocatedSize; + } + + constructor(desiredSize: number, init: number, a?: Arena) { + super(a); + if (init === undefined || init === null) { + this.nativePtr = emscAlloc.malloc(desiredSize); + } else { + this.nativePtr = init; + } + this.allocatedSize = desiredSize; + } + + static fromString(s: string, a?: Arena): ByteArray { + let hstr = emscAlloc.malloc(s.length + 1); + Module.writeStringToMemory(s, hstr); + return new ByteArray(s.length, hstr, a); + } + + static fromCrock(s: string, a?: Arena): ByteArray { + let hstr = emscAlloc.malloc(s.length + 1); + Module.writeStringToMemory(s, hstr); + let decodedLen = Math.floor((s.length * 5) / 8); + let ba = new ByteArray(decodedLen, null, a); + let res = emsc.string_to_data(hstr, s.length, ba.nativePtr, decodedLen); + emsc.free(hstr); + if (res != GNUNET_OK) { + throw Error("decoding failed"); + } + return ba; + } +} + + +export class EccSignaturePurpose extends PackedArenaObject { + size() { + return this.payloadSize + 8; + } + + payloadSize: number; + + constructor(purpose: SignaturePurpose, + payload: PackedArenaObject, + a?: Arena) { + super(a); + this.nativePtr = emscAlloc.purpose_create(purpose, + payload.nativePtr, + payload.size()); + this.payloadSize = payload.size(); + } +} + + +abstract class SignatureStruct { + abstract fieldTypes(): Array<any>; + + abstract purpose(): SignaturePurpose; + + private members: any = {}; + + constructor(x: { [name: string]: any }) { + for (let k in x) { + this.set(k, x[k]); + } + } + + toPurpose(a?: Arena): EccSignaturePurpose { + let totalSize = 0; + for (let f of this.fieldTypes()) { + let name = f[0]; + let member = this.members[name]; + if (!member) { + throw Error(format("Member {0} not set", name)); + } + totalSize += member.size(); + } + + let buf = emscAlloc.malloc(totalSize); + let ptr = buf; + for (let f of this.fieldTypes()) { + let name = f[0]; + let member = this.members[name]; + let size = member.size(); + emsc.memmove(ptr, member.nativePtr, size); + ptr += size; + } + let ba = new ByteArray(totalSize, buf, a); + return new EccSignaturePurpose(this.purpose(), ba); + } + + + toJson() { + let res: any = {}; + for (let f of this.fieldTypes()) { + let name = f[0]; + let member = this.members[name]; + if (!member) { + throw Error(format("Member {0} not set", name)); + } + res[name] = member.toJson(); + } + res["purpose"] = this.purpose(); + return res; + } + + protected set(name: string, value: PackedArenaObject) { + let typemap: any = {}; + for (let f of this.fieldTypes()) { + typemap[f[0]] = f[1]; + } + if (!(name in typemap)) { + throw Error(format("Key {0} not found", name)); + } + if (!(value instanceof typemap[name])) { + throw Error(format("Wrong type for {0}", name)); + } + this.members[name] = value; + } +} + + +// It's redundant, but more type safe. +export interface WithdrawRequestPS_Args { + reserve_pub: EddsaPublicKey; + amount_with_fee: AmountNbo; + withdraw_fee: AmountNbo; + h_denomination_pub: HashCode; + h_coin_envelope: HashCode; +} + + +export class WithdrawRequestPS extends SignatureStruct { + constructor(w: WithdrawRequestPS_Args) { + super(w); + } + + purpose() { + return SignaturePurpose.RESERVE_WITHDRAW; + } + + fieldTypes() { + return [ + ["reserve_pub", EddsaPublicKey], + ["amount_with_fee", AmountNbo], + ["withdraw_fee", AmountNbo], + ["h_denomination_pub", HashCode], + ["h_coin_envelope", HashCode] + ]; + } +} + + +export class AbsoluteTimeNbo extends PackedArenaObject { + static fromTalerString(s: string): AbsoluteTimeNbo { + let x = new AbsoluteTimeNbo(); + x.alloc(); + let r = /Date\(([0-9]+)\)/; + let m = r.exec(s); + if (m.length != 2) { + throw Error(); + } + let n = parseInt(m[1]) * 1000000; + // XXX: This only works up to 54 bit numbers. + set64(x.getNative(), n); + return x; + } + + size() { + return 8; + } +} + + +// XXX: This only works up to 54 bit numbers. +function set64(p: number, n: number) { + for (let i = 0; i < 8; ++i) { + Module.setValue(p + (7 - i), n & 0xFF, "i8"); + n = Math.floor(n / 256); + } + +} + + +export class UInt64 extends PackedArenaObject { + static fromNumber(n: number): UInt64 { + let x = new UInt64(); + x.alloc(); + set64(x.getNative(), n); + return x; + } + + size() { + return 8; + } +} + + +// It's redundant, but more type safe. +export interface DepositRequestPS_Args { + h_contract: HashCode; + h_wire: HashCode; + timestamp: AbsoluteTimeNbo; + refund_deadline: AbsoluteTimeNbo; + transaction_id: UInt64; + amount_with_fee: AmountNbo; + deposit_fee: AmountNbo; + merchant: EddsaPublicKey; + coin_pub: EddsaPublicKey; +} + + +export class DepositRequestPS extends SignatureStruct { + constructor(w: DepositRequestPS_Args) { + super(w); + } + + purpose() { + return SignaturePurpose.WALLET_COIN_DEPOSIT; + } + + fieldTypes() { + return [ + ["h_contract", HashCode], + ["h_wire", HashCode], + ["timestamp", AbsoluteTimeNbo], + ["refund_deadline", AbsoluteTimeNbo], + ["transaction_id", UInt64], + ["amount_with_fee", AmountNbo], + ["deposit_fee", AmountNbo], + ["merchant", EddsaPublicKey], + ["coin_pub", EddsaPublicKey], + ]; + } +} + + +interface Encodeable { + encode(arena?: Arena): ByteArray; +} + +function makeEncode(encodeFn) { + function encode(arena?: Arena) { + let ptr = emscAlloc.malloc(PTR_SIZE); + let len = encodeFn(this.getNative(), ptr); + let res = new ByteArray(len, null, arena); + res.setNative(Module.getValue(ptr, '*')); + emsc.free(ptr); + return res; + } + return encode; +} + + +export class RsaPublicKey extends ArenaObject implements Encodeable { + static fromCrock: (s: string, a?: Arena) => RsaPublicKey; + + toCrock() { + return this.encode().toCrock(); + } + + destroy() { + emsc.rsa_public_key_free(this.nativePtr); + this.nativePtr = 0; + } + + encode: (arena?: Arena) => ByteArray; +} +mixinStatic(RsaPublicKey, makeFromCrock(emscAlloc.rsa_public_key_decode)); +mixin(RsaPublicKey, makeEncode(emscAlloc.rsa_public_key_encode)); + + +export class EddsaSignature extends PackedArenaObject { + size() { + return 64; + } +} + + +export class RsaSignature extends ArenaObject implements Encodeable{ + static fromCrock: (s: string, a?: Arena) => RsaSignature; + + encode: (arena?: Arena) => ByteArray; + + destroy() { + emsc.rsa_signature_free(this.getNative()); + this.setNative(0); + } +} +mixinStatic(RsaSignature, makeFromCrock(emscAlloc.rsa_signature_decode)); +mixin(RsaSignature, makeEncode(emscAlloc.rsa_signature_encode)); + + +export function rsaBlind(hashCode: HashCode, + blindingKey: RsaBlindingKey, + pkey: RsaPublicKey, + arena?: Arena): ByteArray { + let ptr = emscAlloc.malloc(PTR_SIZE); + let s = emscAlloc.rsa_blind(hashCode.nativePtr, + blindingKey.nativePtr, + pkey.nativePtr, + ptr); + return new ByteArray(s, Module.getValue(ptr, '*'), arena); +} + + +export function eddsaSign(purpose: EccSignaturePurpose, + priv: EddsaPrivateKey, + a?: Arena): EddsaSignature { + let sig = new EddsaSignature(a); + sig.alloc(); + let res = emsc.eddsa_sign(priv.nativePtr, purpose.nativePtr, sig.nativePtr); + if (res < 1) { + throw Error("EdDSA signing failed"); + } + return sig; +} + + +export function rsaUnblind(sig: RsaSignature, + bk: RsaBlindingKey, + pk: RsaPublicKey, + a?: Arena): RsaSignature { + let x = new RsaSignature(a); + x.nativePtr = emscAlloc.rsa_unblind(sig.nativePtr, + bk.nativePtr, + pk.nativePtr); + return x; +} |