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fix: check that data is large enough to fit header and mac #7118

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merged 1 commit into from Mar 12, 2024
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fix: check that data is large enough to fit header and mac #7118

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7 changes: 7 additions & 0 deletions crates/net/ecies/src/algorithm.rs
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Expand Up @@ -637,6 +637,13 @@ impl ECIES {
}

pub fn read_header(&mut self, data: &mut [u8]) -> Result<usize, ECIESError> {
// If the data is not large enough to fit the header and mac bytes, return an error
//
// The header is 16 bytes, and the mac is 16 bytes, so the data must be at least 32 bytes
if data.len() < 32 {
return Err(ECIESErrorImpl::InvalidHeader.into())
}

let (header_bytes, mac_bytes) = split_at_mut(data, 16)?;
let header = HeaderBytes::from_mut_slice(header_bytes);
let mac = B128::from_slice(&mac_bytes[..16]);
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