parquet.encryption.plaintext.footer parameter being true, code expects parquet.encryption.footer.key

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
```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)
```
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.

 
```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.(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
```
 

**Reporter**: [Vignesh Nageswaran](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=Nageswaran)

_{**Note**: *This issue was originally created as [PARQUET-2194](https://issues.apache.org/jira/browse/PARQUET-2194). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Bắt đầu với reproducer và stack trace tại PropertiesDrivenCryptoFactory.java:88, sau đó kiểm tra ParquetOutputFormat.java xung quanh việc tạo các thuộc tính mã hóa. Xác minh liệu parquet.encryption.plaintext.footer=true có vẫn yêu cầu parquet.encryption.footer.key hay không, và xác định hoàn tất khi cấu hình được báo cáo chạy xong mà không có lỗi Undefined footer key.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.