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fix: check for key retriever in Parquet decryption properties conversion #24866

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fix: check for key retriever in Parquet decryption properties conversion #24866

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21 changes: 16 additions & 5 deletions datafusion/common/src/config.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -3672,11 +3672,20 @@ impl TryFrom<&Arc<FileDecryptionProperties>> for ConfigFileDecryptionProperties
type Error = DataFusionError;

fn try_from(f: &Arc<FileDecryptionProperties>) -> Result<Self> {
if f.uses_key_retriever() {
// Getting the keys is not possible without the key metadata from
// a Parquet file if a key retriever is used.
return Err(
DataFusionError::Configuration(
"Cannot convert FileDecryptionProperties that use a key retriever to ConfigFileDecryptionProperties".into()
)
);
}

let footer_key = f.footer_key(None).map_err(|e| {
// This shouldn't happen for FileDecryptionProperties that don't use a key retriever.
DataFusionError::Configuration(format!(
"Could not retrieve footer key from FileDecryptionProperties. \
Note that conversion to ConfigFileDecryptionProperties is not supported \
when using a key retriever: {e}"
"Could not retrieve footer key from FileDecryptionProperties: {e}"
))
})?;

Expand Down Expand Up @@ -4474,8 +4483,10 @@ mod tests {
(&decryption_properties).try_into();
assert!(config_file_decryption_properties.is_err());
let err = config_file_decryption_properties.unwrap_err().to_string();
assert!(err.contains("key retriever"));
assert!(err.contains("Key metadata not provided"));
assert_contains!(
err,
"Cannot convert FileDecryptionProperties that use a key retriever to ConfigFileDecryptionProperties"
);
}

#[cfg(feature = "parquet")]
Expand Down