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Merge pull request #482 from bitcoinjs/opint

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fix isMultisigOutput allowing m data
This commit is contained in:
Daniel Cousens 2015-10-02 15:34:39 +10:00
commit 0eadf3d5ae
2 changed files with 33 additions and 20 deletions
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45
src/script.js
View file

@ -4,11 +4,16 @@ var typeforce = require('typeforce')
var types = require('./types')
var OPS = require('./opcodes')
var REVERSE_OPS = []
for (var op in OPS) {
var code = OPS[op]
REVERSE_OPS[code] = op
}
var REVERSE_OPS = (function () {
var result = {}
for (var op in OPS) {
var code = OPS[op]
result[code] = op
}
return result
})()
const OP_INT_BASE = OPS.OP_RESERVED // OP_1 - 1
function toASM (chunks) {
if (types.Buffer(chunks)) {
@ -225,21 +230,21 @@ function isMultisigOutput (script) {
if (chunks[chunks.length - 1] !== OPS.OP_CHECKMULTISIG) return false
var mOp = chunks[0]
if (mOp < OPS.OP_1) return false
if (mOp > OPS.OP_16) return false
var nOp = chunks[chunks.length - 2]
if (nOp < OPS.OP_1) return false
if (nOp > OPS.OP_16) return false
var m = mOp - (OPS.OP_1 - 1)
var n = nOp - (OPS.OP_1 - 1)
if (n < m) return false
if (!types.Number(mOp)) return false
if (!types.Number(nOp)) return false
var pubKeys = chunks.slice(1, -2)
if (n !== pubKeys.length) return false
var m = mOp - OP_INT_BASE
var n = nOp - OP_INT_BASE
return pubKeys.every(isCanonicalPubKey)
// 0 < m <= n <= 16
if (m <= 0) return false
if (m > n) return false
if (n > 16) return false
if (n !== chunks.length - 3) return false
return chunks.slice(1, -2).every(isCanonicalPubKey)
}
function isNullDataOutput (script) {
@ -309,9 +314,9 @@ function multisigOutput (m, pubKeys) {
if (n < m) throw new Error('Not enough pubKeys provided')
return compile([].concat(
(OPS.OP_1 - 1) + m,
OP_INT_BASE + m,
pubKeys,
(OPS.OP_1 - 1) + n,
OP_INT_BASE + n,
OPS.OP_CHECKMULTISIG
))
}
@ -349,8 +354,8 @@ function multisigInput (signatures, scriptPubKey) {
var mOp = chunks[0]
var nOp = chunks[chunks.length - 2]
var m = mOp - (OPS.OP_1 - 1)
var n = nOp - (OPS.OP_1 - 1)
var m = mOp - OP_INT_BASE
var n = nOp - OP_INT_BASE
if (signatures.length < m) throw new Error('Not enough signatures provided')
if (signatures.length > n) throw new Error('Too many signatures provided')

8
test/fixtures/script.json vendored
View file

@ -245,6 +245,14 @@
"description": "n > len(pubKeys)",
"scriptPubKey": "OP_1 024289801366bcee6172b771cf5a7f13aaecd237a0b9a1ff9d769cabc2e6b70a34 OP_2 OP_CHECKMULTISIG"
},
{
"description": "m is data",
"scriptPubKey": "ffff 024289801366bcee6172b771cf5a7f13aaecd237a0b9a1ff9d769cabc2e6b70a34 OP_1 OP_CHECKMULTISIG"
},
{
"description": "n is data",
"scriptPubKey": "OP_1 024289801366bcee6172b771cf5a7f13aaecd237a0b9a1ff9d769cabc2e6b70a34 ffff OP_CHECKMULTISIG"
},
{
"description": "non-canonical pubKey (bad length)",
"scriptPubKey": "OP_1 0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ffff OP_1 OP_CHECKMULTISIG"