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Check global counter length

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This commit is contained in:
Julien Cretin
2020-12-04 14:42:16 +01:00
parent 042108e3d9
commit 16c0196b1d
1 changed files with 5 additions and 4 deletions
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9
src/ctap/storage.rs
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@@ -294,10 +294,11 @@ impl PersistentStore {
/// Returns the global signature counter. /// Returns the global signature counter.
pub fn global_signature_counter(&self) -> Result<u32, Ctap2StatusCode> { pub fn global_signature_counter(&self) -> Result<u32, Ctap2StatusCode> {
Ok(match self.store.find(key::GLOBAL_SIGNATURE_COUNTER)? { match self.store.find(key::GLOBAL_SIGNATURE_COUNTER)? {
None => 0, None => Ok(0),
Some(value) => u32::from_ne_bytes(*array_ref!(&value, 0, 4)), Some(value) if value.len() == 4 => Ok(u32::from_ne_bytes(*array_ref!(&value, 0, 4))),
}) Some(_) => Err(Ctap2StatusCode::CTAP2_ERR_VENDOR_INVALID_PERSISTENT_STORAGE),
}
} }
/// Increments the global signature counter. /// Increments the global signature counter.