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tape: avoid error when clearing encryption key

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Simply ignore clear request when sg_spin_data_encryption_caps fails.
Assume those are tapes without hardware encryption support.
This commit is contained in:
Dietmar Maurer 2021-01-23 10:20:43 +01:00
parent 44a5f38bc4
commit 979dccc7ec
1 changed files with 10 additions and 1 deletions
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11
src/tape/drive/encryption.rs
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@ -33,7 +33,16 @@ pub fn set_encryption<F: AsRawFd>(
key: Option<[u8; 32]>, key: Option<[u8; 32]>,
) -> Result<(), Error> { ) -> Result<(), Error> {
let data = sg_spin_data_encryption_caps(file)?; let data = match sg_spin_data_encryption_caps(file) {
Ok(data) => data,
Err(err) if key.is_none() => {
/// Assume device does not support HW encryption
/// We can simply ignore the clear key request
return Ok(());
}
Err(err) => return Err(err),
};
let algorithm_index = decode_spin_data_encryption_caps(&data)?; let algorithm_index = decode_spin_data_encryption_caps(&data)?;
sg_spout_set_encryption(file, algorithm_index, key)?; sg_spout_set_encryption(file, algorithm_index, key)?;