Karthik Palaniappan created HDFS-9878:
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Summary: Data transfer encryption with AES 192: Invalid key length.
Key: HDFS-9878
URL: https://issues.apache.org/jira/browse/HDFS-9878
Project: Hadoop HDFS
Issue Type: Bug
Components: datanode, hdfs-client
Affects Versions: 2.7.2
Environment: OS: Ubuntu 14.04
/hadoop-2.7.2/bin$ uname -a
Linux wkstn-kpalaniappan 3.13.0-79-generic #123-Ubuntu SMP Fri Feb 19 14:27:58
UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
/hadoop-2.7.2/bin$ java -version
java version "1.7.0_95"
OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-0ubuntu0.14.04.1)
OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode)
Hadoop version: 2.7.2
Reporter: Karthik Palaniappan
Configuring aes 128 or aes 256 encryption
(dfs.encrypt.data.transfer.cipher.key.bitlength = [128, 256]) works perfectly
fine. Trying to use AES 192 generates this exception on the datanode:
16/02/29 17:34:10 ERROR datanode.DataNode: wkstn-kpalaniappan:50010:DataXceiver
error processing unknown operation src: /127.0.0.1:57237 dst: /127.0.0.1:50010
java.lang.IllegalArgumentException: Invalid key length.
at org.apache.hadoop.crypto.OpensslCipher.init(Native Method)
at org.apache.hadoop.crypto.OpensslCipher.init(OpensslCipher.java:176)
at
org.apache.hadoop.crypto.OpensslAesCtrCryptoCodec$OpensslAesCtrCipher.init(OpensslAesCtrCryptoCodec.java:116)
at
org.apache.hadoop.crypto.CryptoInputStream.updateDecryptor(CryptoInputStream.java:290)
at
org.apache.hadoop.crypto.CryptoInputStream.resetStreamOffset(CryptoInputStream.java:303)
at
org.apache.hadoop.crypto.CryptoInputStream.<init>(CryptoInputStream.java:128)
at
org.apache.hadoop.crypto.CryptoInputStream.<init>(CryptoInputStream.java:109)
at
org.apache.hadoop.crypto.CryptoInputStream.<init>(CryptoInputStream.java:133)
at
org.apache.hadoop.hdfs.protocol.datatransfer.sasl.DataTransferSaslUtil.createStreamPair(DataTransferSaslUtil.java:345)
at
org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferServer.doSaslHandshake(SaslDataTransferServer.java:396)
at
org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferServer.getEncryptedStreams(SaslDataTransferServer.java:178)
at
org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferServer.receive(SaslDataTransferServer.java:110)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:193)
at java.lang.Thread.run(Thread.java:745)
And this exception on the client:
/hadoop-2.7.2/bin$ ./hdfs dfs -copyFromLocal ~/.vimrc /vimrc
16/02/29 17:34:10 WARN hdfs.DFSClient: DataStreamer Exception
java.lang.IllegalArgumentException: Invalid key length.
at org.apache.hadoop.crypto.OpensslCipher.init(Native Method)
at org.apache.hadoop.crypto.OpensslCipher.init(OpensslCipher.java:176)
at
org.apache.hadoop.crypto.OpensslAesCtrCryptoCodec$OpensslAesCtrCipher.init(OpensslAesCtrCryptoCodec.java:116)
at
org.apache.hadoop.crypto.CryptoInputStream.updateDecryptor(CryptoInputStream.java:290)
at
org.apache.hadoop.crypto.CryptoInputStream.resetStreamOffset(CryptoInputStream.java:303)
at
org.apache.hadoop.crypto.CryptoInputStream.<init>(CryptoInputStream.java:128)
at
org.apache.hadoop.crypto.CryptoInputStream.<init>(CryptoInputStream.java:109)
at
org.apache.hadoop.crypto.CryptoInputStream.<init>(CryptoInputStream.java:133)
at
org.apache.hadoop.hdfs.protocol.datatransfer.sasl.DataTransferSaslUtil.createStreamPair(DataTransferSaslUtil.java:345)
at
org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.doSaslHandshake(SaslDataTransferClient.java:490)
at
org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.getEncryptedStreams(SaslDataTransferClient.java:299)
at
org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.send(SaslDataTransferClient.java:242)
at
org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.checkTrustAndSend(SaslDataTransferClient.java:211)
at
org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient.socketSend(SaslDataTransferClient.java:183)
at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1318)
at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1266)
at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)
copyFromLocal: DataStreamer Exception:
The issue is in the openssl c code:
https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/crypto/OpensslCipher.c#L204.
It asserts that the key length is 128 or 256 bits, but does not allow 192.
Multiple hadoop documents say that
dfs.encrypt.data.transfer.cipher.key.bitlength can be set to 128, 192, or 256:
https://hadoop.apache.org/docs/r2.6.0/hadoop-project-dist/hadoop-common/SecureMode.html,
https://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml.
Are these documents wrong? Or is it an environment-specific issue?
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