org.apache.hadoop.hbase.security

Class EncryptionUtil

java.lang.Object

org.apache.hadoop.hbase.security.EncryptionUtil

@InterfaceAudience.Private
 @InterfaceStability.Evolving
public final class EncryptionUtil
extends Object

Some static utility methods for encryption uses in hbase-client.

Method Summary

Modifier and Type	Method and Description
static CryptoAES	createCryptoAES(RPCProtos.CryptoCipherMeta cryptoCipherMeta, org.apache.hadoop.conf.Configuration conf) Helper to create an instance of CryptoAES.
static Encryption.Context	createEncryptionContext(org.apache.hadoop.conf.Configuration conf, ColumnFamilyDescriptor family) Helper to create an encyption context.
static Key	unwrapKey(org.apache.hadoop.conf.Configuration conf, byte[] keyBytes) Helper for unwrapKey(Configuration, String, byte[]) which automatically uses the configured master and alternative keys, rather than having to specify a key type to unwrap with.
static Key	unwrapKey(org.apache.hadoop.conf.Configuration conf, String subject, byte[] value) Unwrap a key by decrypting it with the secret key of the given subject.
static Key	unwrapWALKey(org.apache.hadoop.conf.Configuration conf, String subject, byte[] value) Unwrap a wal key by decrypting it with the secret key of the given subject.
static byte[]	wrapKey(org.apache.hadoop.conf.Configuration conf, byte[] key, String algorithm) Protect a key by encrypting it with the secret key of the given subject.
static byte[]	wrapKey(org.apache.hadoop.conf.Configuration conf, String subject, Key key) Protect a key by encrypting it with the secret key of the given subject.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

wrapKey

public static byte[] wrapKey(org.apache.hadoop.conf.Configuration conf,
                             byte[] key,
                             String algorithm)
                      throws IOException

Protect a key by encrypting it with the secret key of the given subject. The configuration must be set up correctly for key alias resolution.

Parameters:

conf - configuration

key - the raw key bytes

algorithm - the algorithm to use with this key material

Returns:

the encrypted key bytes

Throws:

IOException

wrapKey

public static byte[] wrapKey(org.apache.hadoop.conf.Configuration conf,
                             String subject,
                             Key key)
                      throws IOException

Protect a key by encrypting it with the secret key of the given subject. The configuration must be set up correctly for key alias resolution.

Parameters:

conf - configuration

subject - subject key alias

key - the key

Returns:

the encrypted key bytes

Throws:

IOException

unwrapKey

public static Key unwrapKey(org.apache.hadoop.conf.Configuration conf,
                            String subject,
                            byte[] value)
                     throws IOException,
                            KeyException

Unwrap a key by decrypting it with the secret key of the given subject. The configuration must be set up correctly for key alias resolution.

Parameters:

conf - configuration

subject - subject key alias

value - the encrypted key bytes

Returns:

the raw key bytes

Throws:

IOException

KeyException

unwrapWALKey

public static Key unwrapWALKey(org.apache.hadoop.conf.Configuration conf,
                               String subject,
                               byte[] value)
                        throws IOException,
                               KeyException

Unwrap a wal key by decrypting it with the secret key of the given subject. The configuration must be set up correctly for key alias resolution.

Parameters:

conf - configuration

subject - subject key alias

value - the encrypted key bytes

Returns:

the raw key bytes

Throws:

IOException - if key is not found for the subject, or if some I/O error occurs

KeyException - if fail to unwrap the key

createEncryptionContext

public static Encryption.Context createEncryptionContext(org.apache.hadoop.conf.Configuration conf,
                                                         ColumnFamilyDescriptor family)
                                                  throws IOException

Helper to create an encyption context.

Parameters:

conf - The current configuration.

family - The current column descriptor.

Returns:

The created encryption context.

Throws:

IOException - if an encryption key for the column cannot be unwrapped

unwrapKey

public static Key unwrapKey(org.apache.hadoop.conf.Configuration conf,
                            byte[] keyBytes)
                     throws IOException

Helper for unwrapKey(Configuration, String, byte[]) which automatically uses the configured master and alternative keys, rather than having to specify a key type to unwrap with. The configuration must be set up correctly for key alias resolution.

Parameters:

conf - the current configuration

keyBytes - the key encrypted by master (or alternative) to unwrap

Returns:

the key bytes, decrypted

Throws:

IOException - if the key cannot be unwrapped

createCryptoAES

public static CryptoAES createCryptoAES(RPCProtos.CryptoCipherMeta cryptoCipherMeta,
                                        org.apache.hadoop.conf.Configuration conf)
                                 throws IOException

Helper to create an instance of CryptoAES.

Parameters:

conf - The current configuration.

cryptoCipherMeta - The metadata for create CryptoAES.

Returns:

The instance of CryptoAES.

Throws:

IOException - if create CryptoAES failed