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Script: clone tx before performing correctlySpends check. This prevents thread safety issues and corrupted transactions if validation fails.

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This commit is contained in:
Mike Hearn 2013-10-07 18:09:38 +02:00
parent 9953bbe5cb
commit 1f7dd9495e
1 changed files with 7 additions and 0 deletions
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7
core/src/main/java/com/google/bitcoin/script/Script.java
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@ -1168,6 +1168,13 @@ public class Script {
*/ */
public void correctlySpends(Transaction txContainingThis, long scriptSigIndex, Script scriptPubKey, public void correctlySpends(Transaction txContainingThis, long scriptSigIndex, Script scriptPubKey,
boolean enforceP2SH) throws ScriptException { boolean enforceP2SH) throws ScriptException {
// Clone the transaction because executing the script involves editing it, and if we die, we'll leave
// the tx half broken (also it's not so thread safe to work on it directly.
try {
txContainingThis = new Transaction(txContainingThis.getParams(), txContainingThis.bitcoinSerialize());
} catch (ProtocolException e) {
throw new RuntimeException(e); // Should not happen unless we were given a totally broken transaction.
}
if (getProgram().length > 10000 || scriptPubKey.getProgram().length > 10000) if (getProgram().length > 10000 || scriptPubKey.getProgram().length > 10000)
throw new ScriptException("Script larger than 10,000 bytes"); throw new ScriptException("Script larger than 10,000 bytes");