Setup CSE-CUSTOM

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Setup CSE-CUSTOM - Amazon EMR

To use CSE-CUSTOM, you must create a custom key provider by implementing the Keyring interface. Here's a sample implementation:


public class CustomKeyring implements Keyring {
  public CustomKeyring()  {
    // custom code
  }

  @Override
  public EncryptionMaterials onEncrypt(EncryptionMaterials encryptionMaterials) {
    // custom code
  }

  @Override
  public DecryptionMaterials onDecrypt(DecryptionMaterials decryptionMaterials,
      ListEncryptedDataKey list) {
    // custom code
  }

You can enable Client-Side Encryption Custom Keys (CSE-CUSTOM) in two primary scopes:

The first scope is cluster-wide configuration:


[
  {
    "Classification":"core-site",
    "Properties": {
       "fs.s3a.encryption.algorithm": "CSE-CUSTOM",
       "fs.s3a.cse.customKeyringProvider.uri":"S3 path of custom jar",
       "fs.s3a.encryption.cse.custom.keyring.class.name":"fully qualified class name"
    }
  }
]

The second is job or application-specific configuration. CSE-CUSTOM can be setup for a specific Spark application as follows:
```
spark-submit --conf spark.hadoop.fs.s3a.encryption.algorithm=CSE-CUSTOM --conf spark.hadoop.fs.s3a.encryption.cse.custom.keyring.class.name=fully qualified class name
```
Note
Ensure that the required custom jar for generating encryption/decryption keys is present in the class path.