org.keycloak.vault

Class DefaultVaultTranscriber

java.lang.Object

org.keycloak.vault.DefaultVaultTranscriber

All Implemented Interfaces:

VaultTranscriber

public class DefaultVaultTranscriber
extends Object
implements VaultTranscriber

Default VaultTranscriber implementation that uses the configured VaultProvider to obtain raw secrets and convert them into other types. By default, the VaultProvider provides raw secrets through a ByteBuffer. This class offers methods to convert the raw secrets into other types (such as VaultCharSecret or WeakReference).

Author:

Stefan Guilhen

See Also:

VaultRawSecret, VaultCharSecret

Constructor Summary

Constructors

Constructor and Description
DefaultVaultTranscriber(VaultProvider provider)

Method Summary

Modifier and Type	Method and Description
VaultCharSecret	getCharSecret(String value) Obtains the secret represented as a VaultCharSecret from the vault that matches the entry in the specified value string.
VaultRawSecret	getRawSecret(String value) Obtains the raw secret from the vault that matches the entry in the specified value string.
VaultStringSecret	getStringSecret(String value) Obtains the secret represented as a String from the vault that matches the entry in the specified value.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultVaultTranscriber

public DefaultVaultTranscriber(VaultProvider provider)

Method Detail

getRawSecret

public VaultRawSecret getRawSecret(String value)

Description copied from interface: VaultTranscriber

Obtains the raw secret from the vault that matches the entry in the specified value string. The value must follow the format ${vault.<KEY>} where <KEY> identifies the entry in the vault. If the value doesn't follow the vault expression format, it is assumed to be the secret itself and is encoded into a VaultRawSecret.

The returned VaultRawSecret extends AutoCloseable and it is strongly recommended that it is used in try-with-resources blocks to ensure the raw secret is overridden (destroyed) when the calling code is finished using it.

Specified by:

getRawSecret in interface VaultTranscriber

Parameters:

value - a String that might be a vault expression containing a vault entry key.

Returns:

a VaultRawSecret representing the secret that was read from the vault. If the specified value is not a vault expression then the returned secret is the value itself encoded as a VaultRawSecret.

getCharSecret

public VaultCharSecret getCharSecret(String value)

Description copied from interface: VaultTranscriber

Obtains the secret represented as a VaultCharSecret from the vault that matches the entry in the specified value string. The value must follow the format ${vault.<KEY>} where <KEY> identifies the entry in the vault. If the value doesn't follow the vault expression format, it is assumed to be the secret itself and is encoded into a VaultCharSecret.

The returned VaultCharSecret extends AutoCloseable and it is strongly recommended that it is used in try-with-resources blocks to ensure the raw secret is overridden (destroyed) when the calling code is finished using it.

Specified by:

getCharSecret in interface VaultTranscriber

Parameters:

value - a String that might be a vault expression containing a vault entry key.

Returns:

a VaultRawSecret representing the secret that was read from the vault. If the specified value is not a vault expression then the returned secret is the value itself encoded as a VaultRawSecret.

getStringSecret

public VaultStringSecret getStringSecret(String value)

Description copied from interface: VaultTranscriber

Obtains the secret represented as a String from the vault that matches the entry in the specified value. The value must follow the format ${vault.<KEY>} where <KEY> identifies the entry in the vault. If the value doesn't follow the vault expression format, it is assumed to be the secret itself.

Due to the immutable nature of strings and the way the JVM handles them internally, implementations that keep a reference to the secret string might consider doing so using a WeakReference that can be cleared in the AutoCloseable.close() method. Being immutable, such strings cannot be overridden (destroyed) by the implementation, but using a WeakReference guarantees that at least no hard references to the secret are held by the implementation class itself (which would prevent proper GC disposal of the secrets).

WARNING: It is strongly recommended that callers of this method use the returned secret in try-with-resources blocks and they should strive not to keep hard references to the enclosed secret string for any longer than necessary so that the secret becomes available for GC as soon as possible. These measures help shorten the window of time when the secret strings are readable from memory.

Specified by:

getStringSecret in interface VaultTranscriber

Parameters:

value - a String that might be a vault expression containing a vault entry key.

Returns:

a VaultStringSecret representing the secret that was read from the vault. If the specified value is not a vault expression then the returned secret is the value itself encoded as a VaultStringSecret.