THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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final String text = "The true sign of intelligence is not knowledge but imagination.";
// Create the secret keys for encrypting the content encryption key:
SecretKey wrapperKey1 = CryptoUtils.createSecretKeySpec(WRAPPER_BYTES1, "AES");
SecretKey wrapperKey2 = CryptoUtils.createSecretKeySpec(WRAPPER_BYTES2, "AES");
// Create KeyEncryptionProviders initialized with these secret keys:
KeyEncryptionProvider keyEncryption1 = JweUtils.getSecretKeyEncryptionAlgorithm(wrapperKey1, KeyAlgorithm.A128KW);
KeyEncryptionProvider keyEncryption2 = JweUtils.getSecretKeyEncryptionAlgorithm(wrapperKey2, KeyAlgorithm.A128KW);
// If you work with the public keys do this instead:
// PublicKey publicKey1 = ...;
// KeyEncryptionProvider keyEncryption1 = JweUtils.getPublicKeyEncryptionProvider(publicKey1, KeyAlgorithm.RSA_AEP);
// PublicKey publicKey2 = ...;
// KeyEncryptionProvider keyEncryption2 = JweUtils.getPublicKeyEncryptionProvider(publicKey2, KeyAlgorithm.RSA_AEP);
// Create ContentEncryptionProvider:
ContentEncryptionProvider contentEncryption = new AesGcmContentEncryptionAlgorithm(CEK_BYTES, ContentAlgorithm.A128GCM);
// If a single recipient then this line is enough:
//ContentEncryptionProvider contentEncryption = JweUtils.getContentEncryptionProvider(ContentAlgorithm.A128GCM);
// Prepare JweEncryptionProviders, one per each recipient.
List<JweEncryptionProvider> jweProviders = new LinkedList<JweEncryptionProvider>();
jweProviders.add(new JweEncryption(keyEncryption1, contentEncryption));
jweProviders.add(new JweEncryption(keyEncryption2, contentEncryption));
// Let the recipients know that the key encryption algorithm is A128KW.
// This step is optional if the recipients support A128KW only.
// Note because these headers are shared A128KW needs to be supported by all the recipients.
// Per-reciepient specific headers can be used instead to note the key encryption algorithm if required.
// One can also consider setting this property in the shared protected headers, same as it is done below
// with the content algorithm
JweHeaders sharedUnprotectedHeaders = new JweHeaders();
sharedUnprotectedHeaders.setKeyEncryptionAlgorithm(KeyAlgorithm.A128KW);
// Set some other custom shared unprotected header
sharedUnprotectedHeaders.setHeader("customHeader", "customValue");
// Let the recipients know that the content encryption algorithm is A128GCM.
// This step is optional if the recipients support A128GCM only.
JweHeaders protectedHeaders = new JweHeaders(ContentAlgorithm.A128GCM);
// Set per-recipient specific headers
List<JweHeaders> perRecipientHeades = new LinkedList<JweHeaders>();
perRecipientHeades.add(new JweHeaders("key1"));
perRecipientHeades.add(new JweHeaders("key2"));
JweJsonProducer p = new JweJsonProducer(protectedHeaders,
sharedUnprotectedHeaders,
StringUtils.toBytesUTF8(text),
StringUtils.toBytesUTF8(EXTRA_AAD_SOURCE),
false);
String jweJsonOut = p.encryptWith(jweProviders, perRecipientHeades);
JweJsonConsumer consumer = new JweJsonConsumer(jweJsonOut);
KeyAlgorithm keyAlgo = consumer.getSharedUnprotectedHeader().getKeyEncryptionAlgorithm();
ContentAlgorithm ctAlgo = consumer.getProtectedHeader().getContentEncryptionAlgorithm();
// first recipient:
JweDecryptionProvider jwe1 = JweUtils.createJweDecryptionProvider(wrapperKey1, keyAlgo, ctAlgo);
// the consumer will iterate over JWE entries and will try to find the one which can be decrypted with this decryptor
// or do consumer.getRecipientsMap() returning a list of entries and their metadata to do a more precise selection.
String content = consumer.decryptWith(jwe1, Collections.singletonMap("kid", "key1")).getContent();
// second recipient:
JweDecryptionProvider jwe2 = JweUtils.createJweDecryptionProvider(wrapperKey2, keyAlgo, ctAlgo);
content = consumer.decryptWith(jwe2, Collections.singletonMap("kid", "key2")).getContent();
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