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This commit is contained in:
d-yokoi 2019-03-03 23:07:49 +09:00
parent c74ab67ccf
commit 03632f1507
No known key found for this signature in database
GPG key ID: 49EAF81BC6A0D19A
24 changed files with 2321 additions and 1958 deletions

88
ts_src/script_signature.ts
View file

@ -1,64 +1,66 @@
import * as types from './types'
const bip66 = require('bip66')
import * as types from './types';
const bip66 = require('bip66');
const typeforce = require('typeforce')
const typeforce = require('typeforce');
const ZERO = Buffer.alloc(1, 0)
function toDER (x: Buffer): Buffer {
let i = 0
while (x[i] === 0) ++i
if (i === x.length) return ZERO
x = x.slice(i)
if (x[0] & 0x80) return Buffer.concat([ZERO, x], 1 + x.length)
return x
const ZERO = Buffer.alloc(1, 0);
function toDER(x: Buffer): Buffer {
let i = 0;
while (x[i] === 0) ++i;
if (i === x.length) return ZERO;
x = x.slice(i);
if (x[0] & 0x80) return Buffer.concat([ZERO, x], 1 + x.length);
return x;
}
function fromDER (x: Buffer): Buffer {
if (x[0] === 0x00) x = x.slice(1)
const buffer = Buffer.alloc(32, 0)
const bstart = Math.max(0, 32 - x.length)
x.copy(buffer, bstart)
return buffer
function fromDER(x: Buffer): Buffer {
if (x[0] === 0x00) x = x.slice(1);
const buffer = Buffer.alloc(32, 0);
const bstart = Math.max(0, 32 - x.length);
x.copy(buffer, bstart);
return buffer;
}
interface ScriptSignature {
signature: Buffer
hashType: number
signature: Buffer;
hashType: number;
}
// BIP62: 1 byte hashType flag (only 0x01, 0x02, 0x03, 0x81, 0x82 and 0x83 are allowed)
export function decode (buffer: Buffer): ScriptSignature {
const hashType = buffer.readUInt8(buffer.length - 1)
const hashTypeMod = hashType & ~0x80
if (hashTypeMod <= 0 || hashTypeMod >= 4) throw new Error('Invalid hashType ' + hashType)
export function decode(buffer: Buffer): ScriptSignature {
const hashType = buffer.readUInt8(buffer.length - 1);
const hashTypeMod = hashType & ~0x80;
if (hashTypeMod <= 0 || hashTypeMod >= 4)
throw new Error('Invalid hashType ' + hashType);
const decode = bip66.decode(buffer.slice(0, -1))
const r = fromDER(decode.r)
const s = fromDER(decode.s)
const decode = bip66.decode(buffer.slice(0, -1));
const r = fromDER(decode.r);
const s = fromDER(decode.s);
return {
signature: Buffer.concat([r, s], 64),
hashType: hashType
}
hashType: hashType,
};
}
export function encode (signature: Buffer, hashType: number): Buffer {
typeforce({
signature: types.BufferN(64),
hashType: types.UInt8
}, { signature, hashType })
export function encode(signature: Buffer, hashType: number): Buffer {
typeforce(
{
signature: types.BufferN(64),
hashType: types.UInt8,
},
{ signature, hashType },
);
const hashTypeMod = hashType & ~0x80
if (hashTypeMod <= 0 || hashTypeMod >= 4) throw new Error('Invalid hashType ' + hashType)
const hashTypeMod = hashType & ~0x80;
if (hashTypeMod <= 0 || hashTypeMod >= 4)
throw new Error('Invalid hashType ' + hashType);
const hashTypeBuffer = Buffer.allocUnsafe(1)
hashTypeBuffer.writeUInt8(hashType, 0)
const hashTypeBuffer = Buffer.allocUnsafe(1);
hashTypeBuffer.writeUInt8(hashType, 0);
const r = toDER(signature.slice(0, 32))
const s = toDER(signature.slice(32, 64))
const r = toDER(signature.slice(0, 32));
const s = toDER(signature.slice(32, 64));
return Buffer.concat([
bip66.encode(r, s),
hashTypeBuffer
])
return Buffer.concat([bip66.encode(r, s), hashTypeBuffer]);
}