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https://issues.apache.org/jira/browse/PARQUET-2194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17610855#comment-17610855
]
Gidon Gershinsky commented on PARQUET-2194:
-------------------------------------------
Footer key is required also in the plaintext footer mode - it is used to sign
the footer,
https://github.com/apache/parquet-mr/tree/master/parquet-hadoop#class-propertiesdrivencryptofactory
> parquet.encryption.plaintext.footer parameter being true, code expects
> parquet.encryption.footer.key
> ----------------------------------------------------------------------------------------------------
>
> Key: PARQUET-2194
> URL: https://issues.apache.org/jira/browse/PARQUET-2194
> Project: Parquet
> Issue Type: Bug
> Components: parquet-mr
> Affects Versions: 1.12.0
> Reporter: Vignesh Nageswaran
> Priority: Major
>
> Hi Team,
> I want my footer in parquet file to be non encrypted. so I set the
> _parquet.encryption.plaintext.footer_ to be {_}true{_}, but when I tried to
> run my code, parquet-mr is expecting __ value __ for the __ property
> _parquet.encryption.footer.key **_
> Reproducer
> Spark 3.3.0
> Download the
> [file|[https://repo1.maven.org/maven2/org/apache/parquet/parquet-hadoop/1.12.0/parquet-hadoop-1.12.0-tests.jar]
> ] and place it in spark - jar directory
> using spark-shell
> {code:java}
> sc.hadoopConfiguration.set("parquet.crypto.factory.class"
> ,"org.apache.parquet.crypto.keytools.PropertiesDrivenCryptoFactory")
> sc.hadoopConfiguration.set("parquet.encryption.kms.client.class"
> ,"org.apache.parquet.crypto.keytools.mocks.InMemoryKMS")
> sc.hadoopConfiguration.set("parquet.encryption.key.list","key1a:
> BAECAwQFBgcICQoLDA0ODw==, key2a: BAECAAECAAECAAECAAECAA==, keyz:
> BAECAAECAAECAAECAAECAA==")
> sc.hadoopConfiguration.set("parquet.encryption.key.material.store.internally","false")
>
> val encryptedParquetPath = "/tmp/par_enc_footer_non_encrypted"
> val partitionCol = 1
> case class nestedItem(ic: Int = 0, sic : Double, pc: Int = 0)
> case class SquareItem(int_column: Int, square_int_column : Double,
> partitionCol: Int, nestedCol :nestedItem)
> val dataRange = (1 to 100).toList
> val squares = sc.parallelize(dataRange.map(i => new SquareItem(i,
> scala.math.pow(i,2), partitionCol,nestedItem(i,i))))
> squares.toDS().show()
> squares.toDS().write.partitionBy("partitionCol").mode("overwrite").option("parquet.encryption.column.keys",
>
> "key1a:square_int_column,nestedCol.ic;").option("parquet.encryption.plaintext.footer",true).parquet(encryptedParquetPath){code}
> I get the below error, my expectation is if I set properties for my footer to
> be plain text, why do we need keys for footer.
>
> {code:java}
>
> Caused by: org.apache.parquet.crypto.ParquetCryptoRuntimeException: Undefined
> footer key
> at
> org.apache.parquet.crypto.keytools.PropertiesDrivenCryptoFactory.getFileEncryptionProperties(PropertiesDrivenCryptoFactory.java:88)
> at
> org.apache.parquet.hadoop.ParquetOutputFormat.createEncryptionProperties(ParquetOutputFormat.java:554)
> at
> org.apache.parquet.hadoop.ParquetOutputFormat.getRecordWriter(ParquetOutputFormat.java:478)
> at
> org.apache.parquet.hadoop.ParquetOutputFormat.getRecordWriter(ParquetOutputFormat.java:420)
> at
> org.apache.parquet.hadoop.ParquetOutputFormat.getRecordWriter(ParquetOutputFormat.java:409)
> at
> org.apache.spark.sql.execution.datasources.parquet.ParquetOutputWriter.<init>(ParquetOutputWriter.scala:36)
> at
> org.apache.spark.sql.execution.datasources.parquet.ParquetFileFormat$$anon$1.newInstance(ParquetFileFormat.scala:155)
> at
> org.apache.spark.sql.execution.datasources.BaseDynamicPartitionDataWriter.renewCurrentWriter(FileFormatDataWriter.scala:298)
> at
> org.apache.spark.sql.execution.datasources.DynamicPartitionDataSingleWriter.write(FileFormatDataWriter.scala:365)
> at
> org.apache.spark.sql.execution.datasources.FileFormatDataWriter.writeWithMetrics(FileFormatDataWriter.scala:85)
> at
> org.apache.spark.sql.execution.datasources.FileFormatDataWriter.writeWithIterator(FileFormatDataWriter.scala:92)
> at
> org.apache.spark.sql.execution.datasources.FileFormatWriter$.$anonfun$executeTask$1(FileFormatWriter.scala:331)
> at
> org.apache.spark.util.Utils$.tryWithSafeFinallyAndFailureCallbacks(Utils.scala:1538)
> at
> org.apache.spark.sql.execution.datasources.FileFormatWriter$.executeTask(FileFormatWriter.scala:338)
> ... 9 more
> {code}
>
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