diff options
Diffstat (limited to 'packages/taler-util/src')
-rw-r--r-- | packages/taler-util/src/bech32.ts | 131 | ||||
-rw-r--r-- | packages/taler-util/src/bitcoin.ts | 15 | ||||
-rw-r--r-- | packages/taler-util/src/segwit_addr.ts | 91 |
3 files changed, 232 insertions, 5 deletions
diff --git a/packages/taler-util/src/bech32.ts b/packages/taler-util/src/bech32.ts new file mode 100644 index 000000000..03c24e807 --- /dev/null +++ b/packages/taler-util/src/bech32.ts @@ -0,0 +1,131 @@ +// Copyright (c) 2017, 2021 Pieter Wuille +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +var CHARSET = 'qpzry9x8gf2tvdw0s3jn54khce6mua7l'; +var GENERATOR = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3]; + +const encodings: any = { + BECH32: "bech32", + BECH32M: "bech32m", +}; + +export default { + decode: decode, + encode: encode, + encodings: encodings, +}; + +function getEncodingConst(enc: any) { + if (enc == encodings.BECH32) { + return 1; + } else if (enc == encodings.BECH32M) { + return 0x2bc830a3; + } else { + throw new Error('unknown encoding') + } +} + +function polymod(values: any) { + var chk = 1; + for (var p = 0; p < values.length; ++p) { + var top = chk >> 25; + chk = (chk & 0x1ffffff) << 5 ^ values[p]; + for (var i = 0; i < 5; ++i) { + if ((top >> i) & 1) { + chk ^= GENERATOR[i]; + } + } + } + return chk; +} + +function hrpExpand(hrp: any) { + var ret = []; + var p; + for (p = 0; p < hrp.length; ++p) { + ret.push(hrp.charCodeAt(p) >> 5); + } + ret.push(0); + for (p = 0; p < hrp.length; ++p) { + ret.push(hrp.charCodeAt(p) & 31); + } + return ret; +} + +function verifyChecksum(hrp: any, data: any, enc: any) { + return polymod(hrpExpand(hrp).concat(data)) === getEncodingConst(enc); +} + +function createChecksum(hrp: any, data: any, enc: any) { + var values = hrpExpand(hrp).concat(data).concat([0, 0, 0, 0, 0, 0]); + var mod = polymod(values) ^ getEncodingConst(enc); + var ret = []; + for (var p = 0; p < 6; ++p) { + ret.push((mod >> 5 * (5 - p)) & 31); + } + return ret; +} + +function encode(hrp: any, data: any, enc: any): string { + var combined = data.concat(createChecksum(hrp, data, enc)); + var ret = hrp + '1'; + for (var p = 0; p < combined.length; ++p) { + ret += CHARSET.charAt(combined[p]); + } + return ret; +} + +function decode(bechString: any, enc: any) { + var p; + var has_lower = false; + var has_upper = false; + for (p = 0; p < bechString.length; ++p) { + if (bechString.charCodeAt(p) < 33 || bechString.charCodeAt(p) > 126) { + return null; + } + if (bechString.charCodeAt(p) >= 97 && bechString.charCodeAt(p) <= 122) { + has_lower = true; + } + if (bechString.charCodeAt(p) >= 65 && bechString.charCodeAt(p) <= 90) { + has_upper = true; + } + } + if (has_lower && has_upper) { + return null; + } + bechString = bechString.toLowerCase(); + var pos = bechString.lastIndexOf('1'); + if (pos < 1 || pos + 7 > bechString.length || bechString.length > 90) { + return null; + } + var hrp = bechString.substring(0, pos); + var data = []; + for (p = pos + 1; p < bechString.length; ++p) { + var d = CHARSET.indexOf(bechString.charAt(p)); + if (d === -1) { + return null; + } + data.push(d); + } + if (!verifyChecksum(hrp, data, enc)) { + return null; + } + return { hrp: hrp, data: data.slice(0, data.length - 6) }; +}
\ No newline at end of file diff --git a/packages/taler-util/src/bitcoin.ts b/packages/taler-util/src/bitcoin.ts index dd90f514e..f4d3cfeb9 100644 --- a/packages/taler-util/src/bitcoin.ts +++ b/packages/taler-util/src/bitcoin.ts @@ -17,7 +17,7 @@ import { AmountJson } from "." import { Amounts, } from "./amounts" import { getRandomBytes, decodeCrock, encodeCrock } from "./talerCrypto" -import { encode as segwitEncode } from "bech32-buffer" +import * as segwit from "./segwit_addr" /** * * @author sebasjm @@ -34,7 +34,7 @@ function buf2hex(buffer: Uint8Array) { // buffer is an ArrayBuffer .join(''); } -export function generateSegwitAddress(reservePub: string): SegwitAddrs { +export function generateFakeSegwitAddress(reservePub: string, addr: string): SegwitAddrs { const pub = decodeCrock(reservePub) const first_rnd = getRandomBytes(4) @@ -49,11 +49,16 @@ export function generateSegwitAddress(reservePub: string): SegwitAddrs { first_part.set(pub.subarray(0, 16), 4) const second_part = new Uint8Array(first_rnd.length + pub.length / 2) second_part.set(first_rnd, 0) - second_part.set(pub.subarray(16, 32), 4) + second_part.set(pub.subarray(16), 4) + + console.log(first_part.length, second_part.length) + + const prefix = (addr[0] === 't' && addr[1] == 'b') ? "tb" : (addr[0] === 'b' && addr[1] == 'c' && addr[2] === 'r' && addr[3] == 't') ? 'bcrt' : (addr[0] === 'b' && addr[1] == 'c') ? 'bc' : undefined + if (prefix === undefined) throw new Error('unknown bitcoin net') return { - segwitAddr1: segwitEncode("bc", first_part), - segwitAddr2: segwitEncode("bc", second_part), + segwitAddr1: segwit.default.encode(prefix, 0, first_part), + segwitAddr2: segwit.default.encode(prefix, 0, second_part), } } diff --git a/packages/taler-util/src/segwit_addr.ts b/packages/taler-util/src/segwit_addr.ts new file mode 100644 index 000000000..becc5d197 --- /dev/null +++ b/packages/taler-util/src/segwit_addr.ts @@ -0,0 +1,91 @@ +// Copyright (c) 2017, 2021 Pieter Wuille +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to deal +// in the Software without restriction, including without limitation the rights +// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +// copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +// THE SOFTWARE. + +import bech32 from "./bech32.js" + +export default { + encode: encode, + decode: decode +}; + +function convertbits(data: any, frombits: number, tobits: number, pad: boolean): any[] { + var acc = 0; + var bits = 0; + var ret = []; + var maxv = (1 << tobits) - 1; + for (var p = 0; p < data.length; ++p) { + var value = data[p]; + if (value < 0 || (value >> frombits) !== 0) { + return []; //check this, was returning null + } + acc = (acc << frombits) | value; + bits += frombits; + while (bits >= tobits) { + bits -= tobits; + ret.push((acc >> bits) & maxv); + } + } + if (pad) { + if (bits > 0) { + ret.push((acc << (tobits - bits)) & maxv); + } + } else if (bits >= frombits || ((acc << (tobits - bits)) & maxv)) { + return []; //check this, was returning null + } + return ret; +} + +function decode(hrp: any, addr: string) { + var bech32m = false; + var dec = bech32.decode(addr, bech32.encodings.BECH32); + if (dec === null) { + dec = bech32.decode(addr, bech32.encodings.BECH32M); + bech32m = true; + } + if (dec === null || dec.hrp !== hrp || dec.data.length < 1 || dec.data[0] > 16) { + return null; + } + var res = convertbits(dec.data.slice(1), 5, 8, false); + if (res === null || res.length < 2 || res.length > 40) { + return null; + } + if (dec.data[0] === 0 && res.length !== 20 && res.length !== 32) { + return null; + } + if (dec.data[0] === 0 && bech32m) { + return null; + } + if (dec.data[0] !== 0 && !bech32m) { + return null; + } + return { version: dec.data[0], program: res }; +} + +function encode(hrp: any, version: number, program: any): string { + var enc = bech32.encodings.BECH32; + if (version > 0) { + enc = bech32.encodings.BECH32M; + } + var ret = bech32.encode(hrp, [version].concat(convertbits(program, 8, 5, true)), enc); + if (decode(hrp, ret/*, enc*/) === null) { + return ""; //check this was returning null + } + return ret; +}
\ No newline at end of file |