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VaultBytesEncryptor.java
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VaultBytesEncryptor.java
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/*
* Copyright 2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.vault.security;
import org.springframework.security.crypto.codec.Utf8;
import org.springframework.security.crypto.encrypt.BytesEncryptor;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
import org.springframework.vault.core.VaultTransitOperations;
import org.springframework.vault.support.Ciphertext;
import org.springframework.vault.support.Plaintext;
/**
* Vault-based {@link BytesEncryptor} using Vault's {@literal transit} backend.
* Encryption/decryption is bound to a particular key that must support encryption and
* decryption.
*
* @author Mark Paluch
* @since 2.0
*/
public class VaultBytesEncryptor implements BytesEncryptor {
private final VaultTransitOperations transitOperations;
private final String keyName;
/**
* Create a new {@link VaultBytesEncryptor} given {@link VaultTransitOperations} and
* {@code keyName}.
*
* @param transitOperations must not be {@literal null}.
* @param keyName must not be {@literal null} or empty.
*/
public VaultBytesEncryptor(VaultTransitOperations transitOperations, String keyName) {
Assert.notNull(transitOperations, "VaultTransitOperations must not be null");
Assert.hasText(keyName, "Key name must not be null or empty");
this.transitOperations = transitOperations;
this.keyName = keyName;
}
@Override
public byte[] encrypt(byte[] plaintext) {
Assert.notNull(plaintext, "Plaintext must not be null");
Assert.isTrue(!ObjectUtils.isEmpty(plaintext), "Plaintext must not be empty");
Ciphertext ciphertext = transitOperations.encrypt(keyName,
Plaintext.of(plaintext));
return Utf8.encode(ciphertext.getCiphertext());
}
@Override
public byte[] decrypt(byte[] ciphertext) {
Assert.notNull(ciphertext, "Ciphertext must not be null");
Assert.isTrue(!ObjectUtils.isEmpty(ciphertext), "Ciphertext must not be empty");
Plaintext plaintext = transitOperations.decrypt(keyName,
Ciphertext.of(Utf8.decode(ciphertext)));
return plaintext.getPlaintext();
}
}