TxBuilder: fix out-of-order multisignature signing
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4c9fd6010e
commit
23a37fb771
2 changed files with 22 additions and 16 deletions
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@ -49,13 +49,14 @@ function extractInput(txIn) {
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break
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case 'multisig':
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parsed = scriptSig.chunks.slice(1).filter(function(chunk) {
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return chunk !== ops.OP_0
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}).map(ECSignature.parseScriptSignature)
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signatures = scriptSig.chunks.slice(1).map(function(chunk) {
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if (chunk === ops.OP_0) return chunk
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hashType = parsed[0].hashType
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signatures = parsed.map(function(p) { return p.signature })
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initialized = true
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var parsed = ECSignature.parseScriptSignature(chunk)
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hashType = parsed.hashType
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return parsed.signature
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})
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if (redeemScript) {
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pubKeys = redeemScript.chunks.slice(1, -2).map(ECPubKey.fromBuffer)
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@ -124,10 +125,8 @@ TransactionBuilder.fromTransaction = function(transaction) {
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// Extract/add signatures
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txb.inputs = transaction.ins.map(function(txIn) {
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// Coinbase inputs not supported
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assert(!Array.prototype.every.call(txIn.hash, function(x) {
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return x === 0
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}), 'coinbase inputs not supported')
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// TODO: remove me after testcase added
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assert(!isCoinbase(txIn.hash), 'coinbase inputs not supported')
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// Ignore empty scripts
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if (txIn.script.buffer.length === 0) return
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@ -236,9 +235,17 @@ TransactionBuilder.prototype.__build = function(allowIncomplete) {
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case 'multisig':
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assert(input.signatures, 'Transaction is missing signatures')
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var signatures = input.signatures.map(function(signature) {
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// Array.prototype.map is sparse-compatible
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var msSignatures = input.signatures.map(function(signature) {
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return signature.toScriptSignature(input.hashType)
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}).filter(function(signature) { return !!signature })
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})
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// fill in blanks with OP_0
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for (var i = 0; i < msSignatures.length; ++i) {
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if (msSignatures[i]) continue
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msSignatures[i] = ops.OP_0
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}
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var redeemScript = allowIncomplete ? undefined : input.redeemScript
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scriptSig = scripts.multisigInput(signatures, redeemScript)
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@ -276,11 +276,10 @@ describe('TransactionBuilder', function() {
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})
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})
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// TODO: test for reverse order signing
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it('works for the P2SH multisig case', function() {
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it('works for the out-of-order P2SH multisig case', function() {
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var privKeys = [
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"91avARGdfge8E4tZfYLoxeJ5sGBdNJQH4kvjJoQFacbgwmaKkrx",
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"91avARGdfge8E4tZfYLoxeJ5sGBdNJQH4kvjJoQFacbgww7vXtT"
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"91avARGdfge8E4tZfYLoxeJ5sGBdNJQH4kvjJoQFacbgww7vXtT",
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"91avARGdfge8E4tZfYLoxeJ5sGBdNJQH4kvjJoQFacbgwmaKkrx"
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].map(ECKey.fromWIF)
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var redeemScript = Script.fromASM("OP_2 0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8 04c6047f9441ed7d6d3045406e95c07cd85c778e4b8cef3ca7abac09b95c709ee51ae168fea63dc339a3c58419466ceaeef7f632653266d0e1236431a950cfe52a OP_2 OP_CHECKMULTISIG")
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