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rust-bitcoin-unsafe-fast
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Ensure execution state stack is empty at the start 

We had a single `true` on the execution state stack, which would
allow scripts to have one more OP_ENDIF than they are allowed.
This commit is contained in:
Andrew Poelstra 2014-08-31 16:23:47 -07:00
parent 340b569c73
commit d880bd1ccc
1 changed files with 2 additions and 2 deletions
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4
src/blockdata/script.rs
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@ -1690,7 +1690,7 @@ impl Script {
let secp = Secp256k1::new(); let secp = Secp256k1::new();
let mut codeseparator_index = 0u; let mut codeseparator_index = 0u;
let mut exec_stack = vec![true]; let mut exec_stack = vec![];
let mut alt_stack = vec![]; let mut alt_stack = vec![];
let mut index = 0; let mut index = 0;
@ -2051,7 +2051,7 @@ impl Script {
fn recurse<'a>(script: &'a [u8], fn recurse<'a>(script: &'a [u8],
mut stack: AbstractStack, mut stack: AbstractStack,
depth: uint) -> Result<Vec<AbstractStackElem>, ScriptError> { depth: uint) -> Result<Vec<AbstractStackElem>, ScriptError> {
let mut exec_stack = vec![true]; let mut exec_stack = vec![];
// Avoid doing more than 64k forks // Avoid doing more than 64k forks
if depth > 16 { return Err(InterpreterStackOverflow); } if depth > 16 { return Err(InterpreterStackOverflow); }