provide public API for unpacking a header without decrypting a message

AWS Encryption SDK for Java

The AWS Encryption SDK enables secure client-side encryption. It uses cryptography best practices to protect your data and protect the encryption keys that protect your data. Each data object is protected with a unique data encryption key, and the data encryption key is protected with a key encryption key called a wrapping key or master key. The encryption method returns a single, portable encrypted message that contains the encrypted data and the encrypted data key, so you don't need to keep track of the data encryption keys for your data. You can use KMS keys in AWS Key Management Service (AWS KMS) as wrapping keys. The AWS Encryption SDK also provides APIs to define and use encryption keys from other key providers.

The AWS Encryption SDK for Java provides methods for encrypting and decrypting strings, byte arrays, and byte streams. For details, see the example code and the Javadoc.

For more details about the design and architecture of the AWS Encryption SDK, see the AWS Encryption SDK Developer Guide.

Security issue notifications

See Support Policy for details on the current support status of all major versions of this library.

Getting Started

Required Prerequisites

To use the AWS Encryption SDK for Java you must have:

A Java 8 or newer development environment

If you do not have one, we recommend Amazon Corretto.

Note: If you use the Oracle JDK, you must also download and install the Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files.

Declare a Dependency on the AWS Encryption SDK in Java and its dependencies

This library requires the AWS Cryptographic Material Providers Library in Java, and the KMS and DynamoDB clients from the AWS Java SDK V2.

The KMS client from the AWS SDK for Java V1 is an optional dependency.

Note: The AWS Cryptographic Material Providers Library in Java only supports the AWS SDK for Java V2 and requires a HARD dependency on the AWS SDK for Java V2's KMS and DynamoDB clients, regardless of whether a KMS Keyring or Hierarchical Keyring is used.

Via Apache Maven
Add the following to your project's pom.xml.

<project>
...
<dependencyManagement>
 <dependencies>
    <dependency>
      <groupId>software.amazon.awssdk</groupId>
      <artifactId>bom</artifactId>
      <version>2.20.91</version>
      <type>pom</type>
      <scope>import</scope>
    </dependency>
 </dependencies>
</dependencyManagement>
<dependencies>
  <dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-encryption-sdk-java</artifactId>
    <version>3.0.0</version>
  </dependency>
  <dependency>
    <groupId>software.amazon.cryptography</groupId>
    <artifactId>aws-cryptographic-material-providers</artifactId>
    <version>1.0.2</version>
  </dependency>
  <dependency>
    <groupId>software.amazon.awssdk</groupId>
    <artifactId>dynamodb</artifactId>
  </dependency>
  <dependency>
    <groupId>software.amazon.awssdk</groupId>
    <artifactId>kms</artifactId>
  </dependency>
  <!-- The following are optional -->
  <dependency>
      <groupId>com.amazonaws</groupId>
      <artifactId>aws-java-sdk</artifactId>
      <version>1.12.394</version>
      <optional>true</optional>
  </dependency>
</dependencies>
...
</project>

Via Gradle Kotlin
In a Gradle Java Project, add the following to the dependencies section:

implementation("com.amazonaws:aws-encryption-sdk-java:3.0.0")
implementation("software.amazon.cryptography:aws-cryptographic-material-providers:1.0.2")
implementation(platform("software.amazon.awssdk:bom:2.20.91"))
implementation("software.amazon.awssdk:kms")
implementation("software.amazon.awssdk:dynamodb")
// The following are optional:
implementation("com.amazonaws:aws-java-sdk:1.12.394")

Bouncy Castle or Bouncy Castle FIPS

The AWS Encryption SDK for Java uses Bouncy Castle to serialize and deserialize cryptographic objects. It does not explicitly use Bouncy Castle (or any other JCA Provider) for the underlying cryptography. Instead, it uses the platform default, which you can configure or override as documented in the Java Cryptography Architecture (JCA) Reference Guide.

If you do not have Bouncy Castle, go to https://bouncycastle.org/latest_releases.html, then download the provider file that corresponds to your JDK. Or, you can pick it up from Maven (groupId: org.bouncycastle, artifactId: bcprov-jdk18on).

Beginning in version 1.6.1, the AWS Encryption SDK for Java also works with Bouncy Castle FIPS (groupId: org.bouncycastle, artifactId: bc-fips) as an alternative to non-FIPS Bouncy Castle. For help installing and configuring Bouncy Castle FIPS, see BC FIPS documentation, in particular, User Guides and Security Policy.

Optional Prerequisites

AWS Integration

You don't need an Amazon Web Services (AWS) account to use the AWS Encryption SDK, but some example code require an AWS account, an AWS KMS key, and the AWS SDK for Java (either 1.x or 2.x). Note that the KmsAsyncClient is not supported, only the synchronous client.

To create an AWS account, go to Sign In or Create an AWS Account and then choose I am a new user. Follow the instructions to create an AWS account.
To create a key in AWS KMS, see Creating Keys.
To download and install the AWS SDK for Java 2.x, see Installing the AWS SDK for Java 2.x.
To download and install the AWS SDK for Java 1.x, see Installing the AWS SDK for Java 1.x.

Amazon Corretto Crypto Provider

Many users find that the Amazon Corretto Crypto Provider (ACCP) significantly improves the performance of the AWS Encryption SDK. For help installing and using ACCP, see the amazon-corretto-crypto-provider repository.

Get Started

To get started with the AWS Encryption SDK for Java

Instantiate the AWS Encryption SDK.
Create a Keyring from the AWS Cryptographic Material Providers Library.
Encrypt and decrypt data.

// This sample code encrypts and then decrypts a string using an AWS KMS key.
// You provide the KMS key ARN and plaintext string as arguments.
package com.amazonaws.crypto.examples;

import com.amazonaws.encryptionsdk.AwsCrypto;
import com.amazonaws.encryptionsdk.CommitmentPolicy;
import com.amazonaws.encryptionsdk.CryptoResult;
import software.amazon.cryptography.materialproviders.IKeyring;
import software.amazon.cryptography.materialproviders.MaterialProviders;
import software.amazon.cryptography.materialproviders.model.CreateAwsKmsMultiKeyringInput;
import software.amazon.cryptography.materialproviders.model.MaterialProvidersConfig;

import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.Collections;
import java.util.Map;

public class StringExample {
    private static String keyArn;
    private static String plaintext;

    public static void main(final String[] args) {
        keyArn = args[0];
        plaintext = args[1];

        // Instantiate the SDK
        final AwsCrypto crypto = AwsCrypto.standard();
        
        // Create the AWS KMS keyring.
        // We create a multi keyring, as this interface creates the KMS client for us automatically.
        final MaterialProviders materialProviders = MaterialProviders.builder()
                .MaterialProvidersConfig(MaterialProvidersConfig.builder().build())
                .build();
        final CreateAwsKmsMultiKeyringInput keyringInput = 
                CreateAwsKmsMultiKeyringInput.builder().generator(keyArn).build();
        final IKeyring kmsKeyring = materialProviders.CreateAwsKmsMultiKeyring(keyringInput);
        
        // Set up the encryption context
        // NOTE: Encrypted data should have associated encryption context
        // to protect its integrity. This example uses placeholder values.
        // For more information about the encryption context, see
        // https://docs.aws.amazon.com/encryption-sdk/latest/developer-guide/concepts.html#encryption-context
        final Map<String, String> encryptionContext = Collections.singletonMap("ExampleContextKey", "ExampleContextValue");

        // Encrypt the data
        final CryptoResult<byte[], ?> encryptResult = crypto.encryptData(kmsKeyring, plaintext.getBytes(StandardCharsets.UTF_8), encryptionContext);
        final byte[] ciphertext = encryptResult.getResult();
        System.out.println("Ciphertext: " + Arrays.toString(ciphertext));

        // Decrypt the data
        final CryptoResult<byte[], ?> decryptResult = 
                crypto.decryptData(
                        kmsKeyring, 
                        ciphertext,
                        // Verify that the encryption context in the result contains the
                        // encryption context supplied to the encryptData method
                        encryptionContext);

        assert Arrays.equals(decryptResult.getResult(), plaintext.getBytes(StandardCharsets.UTF_8));

        // The data is correct, so return it. 
        System.out.println("Decrypted: " + new String(decryptResult.getResult(), StandardCharsets.UTF_8));
    }
}

You can find more examples in the example directory.

Public API

Our versioning policy applies to all public and protected classes/methods/fields in the com.amazonaws.encryptionsdk package unless otherwise documented.

The com.amazonaws.encryptionsdk.internal package is not included in this public API.

FAQ

See the Frequently Asked Questions page in the official documentation.

	public KmsMasterKeyProvider build() {
	// If we don't have a default region, we need to check that all key IDs will be usable
	if (defaultRegion_ == null) {
	for (String keyId : keyIds_) {
	if (parseRegionfromKeyArn(keyId) == null) {
	throw new AwsCryptoException("Can't use non-ARN key identifiers or aliases when " +
	"no default region is set");
	}
	}
	}

	RegionalClientSupplier supplier = clientFactory();

	return new KmsMasterKeyProvider(supplier, defaultRegion_, keyIds_, emptyList(), false);
	}

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AWS Encryption SDK for Java

Getting Started

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AWS Integration

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Get Started

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