Work

parquet/src/arrow/arrow_writer/mod.rs

@@ -1127,9 +1127,9 @@ mod tests {
 
     use std::fs::File;
 
-    use crate::arrow::arrow_reader::{
-        ArrowReaderOptions, ParquetRecordBatchReader, ParquetRecordBatchReaderBuilder,
-    };
+    #[cfg(feature = "encryption")]
+    use crate::arrow::arrow_reader::ArrowReaderOptions;
+    use crate::arrow::arrow_reader::{ParquetRecordBatchReader, ParquetRecordBatchReaderBuilder};
     use crate::arrow::ARROW_SCHEMA_META_KEY;
     use arrow::datatypes::ToByteSlice;
     use arrow::datatypes::{DataType, Schema};
@@ -1143,8 +1143,10 @@ mod tests {
 
     use crate::basic::Encoding;
     use crate::data_type::AsBytes;
-    use crate::encryption::decryption::FileDecryptionProperties;
-    use crate::encryption::encryption::FileEncryptionProperties;
+    #[cfg(feature = "encryption")]
+    use crate::encryption::{
+        decryption::FileDecryptionProperties, encryption::FileEncryptionProperties,
+    };
     use crate::file::metadata::ParquetMetaData;
     use crate::file::page_index::index::Index;
     use crate::file::page_index::index_reader::read_offset_indexes;

parquet/src/column/writer/mod.rs

@@ -419,6 +419,8 @@ impl<'a, E: ColumnValueEncoder> GenericColumnWriter<'a, E> {
             data_page_boundary_ascending: true,
             data_page_boundary_descending: true,
             last_non_null_data_page_min_max: None,
+            // metadata_encryptor: metadata_encryptor,
+            // data_encryptor: data_encryptor,
         }
     }
 
@@ -3403,7 +3405,8 @@ mod tests {
                 .with_file_encryption_properties(file_encryption_properties)
                 .build(),
         );
-        let mut writer = SerializedFileWriter::new(&file, schema, props).unwrap();
+        let mut _writer = SerializedFileWriter::new(&file, schema, props).unwrap();
+        todo!()
     }
 
     #[test]

parquet/src/encryption/ciphers.rs

@@ -135,6 +135,32 @@ impl RingGcmBlockEncryptor {
 
 impl BlockEncryptor for RingGcmBlockEncryptor {
     fn encrypt(&mut self, plaintext: &[u8], aad: &[u8]) -> Vec<u8> {
-        todo!()
+        let tag = [0u8; TAG_LEN];
+        let mut ciphertext = Vec::from(plaintext);
+        ciphertext.extend_from_slice(&tag);
+
+        self.key.seal_in_place_append_tag(self.nonce_sequence.advance().unwrap(), Aad::from(aad), &mut ciphertext).unwrap();
+        ciphertext
+    }
+}
+
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_round_trip() {
+        let key = [0u8; 16];
+        let mut encryptor = RingGcmBlockEncryptor::new(&key);
+        let decryptor = RingGcmBlockDecryptor::new(&key);
+
+        let plaintext = b"hello, world!";
+        let aad = b"some aad";
+
+        let ciphertext = encryptor.encrypt(plaintext, aad);
+        let decrypted = decryptor.decrypt(&ciphertext, aad).unwrap();
+
+        assert_eq!(plaintext, decrypted.as_slice());
     }
 }

parquet/src/encryption/encryption.rs

@@ -19,7 +19,7 @@ use std::collections::HashMap;
 use std::sync::Arc;
 use crate::encryption::ciphers::{RingGcmBlockEncryptor, BlockEncryptor};
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct FileEncryptionProperties {
     encrypt_footer: bool,
     footer_key: Vec<u8>,
@@ -62,20 +62,26 @@ impl EncryptionPropertiesBuilder {
 pub struct FileEncryptor {
     encryption_properties: FileEncryptionProperties,
     footer_encryptor: Option<Arc<dyn BlockEncryptor>>,
+    column_encryptors: Option<HashMap<Vec<u8>, Arc<dyn BlockEncryptor>>>,
     file_aad: Vec<u8>,
 }
 
 impl FileEncryptor {
     pub(crate) fn new(
-        encryption_properties: FileEncryptionProperties,
-        aad_file_unique: Vec<u8>,
-        aad_prefix: Vec<u8>,
+        encryption_properties: FileEncryptionProperties, file_aad: Vec<u8>,
     ) -> Self {
-        let file_aad = [aad_prefix.as_slice(), aad_file_unique.as_slice()].concat();
-        let footer_encryptor = RingGcmBlockEncryptor::new(&encryption_properties.footer_key);
+        let footer_encryptor = RingGcmBlockEncryptor::new(&encryption_properties.footer_key.clone());
+        let mut column_encryptors: HashMap<Vec<u8>, Arc<dyn BlockEncryptor>> = HashMap::new();
+        if let Some(column_keys) = encryption_properties.column_keys.clone() {
+            for (column_name, key) in column_keys.iter() {
+                let column_encryptor = Arc::new(RingGcmBlockEncryptor::new(key));
+                column_encryptors.insert(column_name.clone(), column_encryptor);
+            }
+        }
         Self {
             encryption_properties,
             footer_encryptor: Some(Arc::new(footer_encryptor)),
+            column_encryptors: Some(column_encryptors),
             file_aad,
         }
     }

parquet/src/file/properties.rs

@@ -172,7 +172,7 @@ pub struct WriterProperties {
     statistics_truncate_length: Option<usize>,
     coerce_types: bool,
     #[cfg(feature = "encryption")]
-    file_encryption_properties: Option<FileEncryptionProperties>,
+    pub(crate) file_encryption_properties: Option<FileEncryptionProperties>,
 }
 
 impl Default for WriterProperties {
@@ -374,11 +374,6 @@ impl WriterProperties {
             .and_then(|c| c.bloom_filter_properties())
             .or_else(|| self.default_column_properties.bloom_filter_properties())
     }
-
-    #[cfg(feature = "encryption")]
-    pub fn file_encryption_properties(&self) -> Option<&FileEncryptionProperties> {
-        self.file_encryption_properties.as_ref()
-    }
 }
 
 /// Builder for  [`WriterProperties`] parquet writer configuration.

parquet/src/file/writer.rs

@@ -33,7 +33,7 @@ use crate::column::{
     writer::{get_column_writer, ColumnWriter},
 };
 use crate::data_type::DataType;
-use crate::encryption::ciphers::RingGcmBlockEncryptor;
+#[cfg(feature = "encryption")]
 use crate::encryption::encryption::FileEncryptor;
 use crate::errors::{ParquetError, Result};
 use crate::file::properties::{BloomFilterPosition, WriterPropertiesPtr};
@@ -155,6 +155,8 @@ pub struct SerializedFileWriter<W: Write> {
     // kv_metadatas will be appended to `props` when `write_metadata`
     kv_metadatas: Vec<KeyValue>,
     finished: bool,
+    #[cfg(feature = "encryption")]
+    file_encryptor: Option<FileEncryptor>,
 }
 
 impl<W: Write> Debug for SerializedFileWriter<W> {
@@ -173,19 +175,45 @@ impl<W: Write + Send> SerializedFileWriter<W> {
     /// Creates new file writer.
     pub fn new(buf: W, schema: TypePtr, properties: WriterPropertiesPtr) -> Result<Self> {
         let mut buf = TrackedWrite::new(buf);
+        #[cfg(feature = "encryption")]
+        let file_encryptor = if properties.file_encryption_properties.is_some() {
+            Some(FileEncryptor::new(
+                properties
+                    .file_encryption_properties
+                    .as_ref()
+                    .unwrap()
+                    .clone(),
+                vec![],
+            ))
+        } else {
+            None
+        };
+
+        #[cfg(feature = "encryption")]
+        if properties.file_encryption_properties.is_some() {
+            // todo: check if all columns in properties.file_encryption_properties.column_keys
+            // are present in the schema
+            let _fep = properties.file_encryption_properties.clone().unwrap();
+            Self::start_encrypted_file(&mut buf)?;
+        } else {
+            Self::start_file(&mut buf)?;
+        }
+        #[cfg(not(feature = "encryption"))]
         Self::start_file(&mut buf)?;
         Ok(Self {
             buf,
             schema: schema.clone(),
             descr: Arc::new(SchemaDescriptor::new(schema)),
-            props: properties,
+            props: properties.clone(),
             row_groups: vec![],
             bloom_filters: vec![],
             column_indexes: Vec::new(),
             offset_indexes: Vec::new(),
             row_group_index: 0,
             kv_metadatas: Vec::new(),
             finished: false,
+            #[cfg(feature = "encryption")]
+            file_encryptor,
         })
     }
 
@@ -274,6 +302,11 @@ impl<W: Write + Send> SerializedFileWriter<W> {
         Ok(())
     }
 
+    fn start_encrypted_file(buf: &mut TrackedWrite<W>) -> Result<()> {
+        buf.write_all(&PARQUET_MAGIC)?;
+        Ok(())
+    }
+
     /// Assembles and writes metadata at the end of the file.
     fn write_metadata(&mut self) -> Result<parquet::FileMetaData> {
         self.finished = true;
@@ -525,9 +558,16 @@ impl<'a, W: Write + Send> SerializedRowGroupWriter<'a, W> {
         ) -> Result<C>,
     {
         self.assert_previous_writer_closed()?;
-        let file_encryption_properties = self.props.file_encryption_properties();
-        let file_encryptor =
-            FileEncryptor::new(file_encryption_properties.unwrap().clone(), vec![], vec![]);
+        #[cfg(feature = "encryption")]
+        let file_encryptor = FileEncryptor::new(
+            self.props
+                .file_encryption_properties
+                .as_ref()
+                .unwrap()
+                .clone(),
+            vec![],
+        );
+
         Ok(match self.next_column_desc() {
             Some(column) => {
                 let props = self.props.clone();