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Enforces sig_rec length in message_signing #1010

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Merged
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Jul 20, 2021
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Enforces sig_rec length in message_signing #1010

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5 changes: 5 additions & 0 deletions lightning/src/util/message_signing.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,11 @@ fn sigrec_encode(sig_rec: RecoverableSignature) -> Vec<u8> {
}

fn sigrec_decode(sig_rec: Vec<u8>) -> Result<RecoverableSignature, Error> {
// Signature must be 64 + 1 bytes long (compact signature + recovery id)
if sig_rec.len() != 65 {
return Err(Error::InvalidSignature);
}

let rsig = &sig_rec[1..];
let rid = sig_rec[0] as i32 - 31;

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