adamreeve commented on code in PR #7111: URL: https://github.com/apache/arrow-rs/pull/7111#discussion_r2006626887
########## parquet/src/encryption/encrypt.rs: ########## @@ -0,0 +1,343 @@ +// Licensed to the Apache Software Foundation (ASF) under one +// or more contributor license agreements. See the NOTICE file +// distributed with this work for additional information +// regarding copyright ownership. The ASF licenses this file +// to you under the Apache License, Version 2.0 (the +// "License"); you may not use this file except in compliance +// with the License. You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, +// software distributed under the License is distributed on an +// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +// KIND, either express or implied. See the License for the +// specific language governing permissions and limitations +// under the License. + +use crate::encryption::ciphers::{BlockEncryptor, RingGcmBlockEncryptor}; +use crate::errors::{ParquetError, Result}; +use crate::file::column_crypto_metadata::{ColumnCryptoMetaData, EncryptionWithColumnKey}; +use crate::schema::types::{ColumnDescPtr, SchemaDescriptor}; +use crate::thrift::TSerializable; +use ring::rand::{SecureRandom, SystemRandom}; +use std::collections::{HashMap, HashSet}; +use std::io::Write; +use thrift::protocol::TCompactOutputProtocol; + +#[derive(Debug, Clone, PartialEq)] +struct EncryptionKey { + key: Vec<u8>, + key_metadata: Option<Vec<u8>>, +} + +impl EncryptionKey { + fn new(key: Vec<u8>) -> EncryptionKey { + Self { + key, + key_metadata: None, + } + } + + fn with_metadata(mut self, metadata: Vec<u8>) -> Self { + self.key_metadata = Some(metadata); + self + } + + fn key(&self) -> &Vec<u8> { + &self.key + } +} + +#[derive(Debug, Clone, PartialEq)] +pub struct FileEncryptionProperties { + encrypt_footer: bool, + footer_key: EncryptionKey, + column_keys: HashMap<String, EncryptionKey>, + aad_prefix: Option<Vec<u8>>, + store_aad_prefix: bool, +} + +impl FileEncryptionProperties { + /// Create a new builder for encryption properties + pub fn builder(footer_key: Vec<u8>) -> EncryptionPropertiesBuilder { + EncryptionPropertiesBuilder::new(footer_key) + } + + /// Should the footer be encrypted + pub fn encrypt_footer(&self) -> bool { + self.encrypt_footer + } + + /// Retrieval metadata of key used for encryption of footer and (possibly) columns + pub fn footer_key_metadata(&self) -> Option<&Vec<u8>> { + self.footer_key.key_metadata.as_ref() + } + + /// AAD prefix string uniquely identifies the file and prevents file swapping + pub fn aad_prefix(&self) -> Option<&Vec<u8>> { + self.aad_prefix.as_ref() + } + + /// Should the AAD prefix be stored in the file + pub fn store_aad_prefix(&self) -> bool { + self.store_aad_prefix && self.aad_prefix.is_some() + } + + /// Checks if columns that are to be encrypted are present in schema + #[cfg(feature = "encryption")] Review Comment: ```suggestion ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@arrow.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
