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## Chapter 41. JSON Web Signature and Encryption (JOSE-JWT)

JSON Web Signature and Encryption (JOSE JWT) is a new specification that can be used to encode content as a string and either digitally sign or encrypt it. I won't go over the spec here Do a Google search on it ifyou're interested

## 41.1. JSON Web Signature (JWS)

To digitally sign content using JWS, use the `org.jboss.resteasy.jose.jws.JWSBuilder` class. To unpack and verify a JWS, use the `org.jboss.resteasy.jose.jws.JWSInput` class. (TODO, write more doco here!) Here's an example:

       @Test
       public void testRSAWithContentType() throws Exception
       {
          KeyPair keyPair = KeyPairGenerator.getInstance("RSA").generateKeyPair();

          String encoded = new JWSBuilder()
                  .contentType(MediaType.TEXT_PLAIN_TYPE)
                  .content("Hello World", MediaType.TEXT_PLAIN_TYPE)
                  .rsa256(keyPair.getPrivate());

          System.out.println(encoded);

          JWSInput input = new JWSInput(encoded, ResteasyProviderFactory.getInstance());
          System.out.println(input.getHeader());
          String msg = (String)input.readContent(String.class);
          Assert.assertEquals("Hello World", msg);
          Assert.assertTrue(RSAProvider.verify(input, keyPair.getPublic()));

       }

## 41.2. JSON Web Encryption (JWE)

To encrypt content using JWE, use the `org.jboss.resteasy.jose.jwe.JWEBuilder` class. To decrypt content using JWE, use the `org.jboss.resteasy.jose.jwe.JWEInput` class. (TODO, write more doco here!) Here's an example:

       @Test
       public void testRSA() throws Exception
       {
          KeyPair keyPair = KeyPairGenerator.getInstance("RSA").generateKeyPair();

          String content = "Live long and prosper.";

          {
          String encoded = new JWEBuilder().contentBytes(content.getBytes()).RSA1_5((RSAPublicKey)keyPair.getPublic());
          System.out.println("encoded: " + encoded);
          byte[] raw = new JWEInput(encoded).decrypt((RSAPrivateKey)keyPair.getPrivate()).getRawContent();
          String from = new String(raw);
          Assert.assertEquals(content, from);
          }
          {
             String encoded = new JWEBuilder().contentBytes(content.getBytes()).RSA_OAEP((RSAPublicKey)keyPair.getPublic());
             System.out.println("encoded: " + encoded);
             byte[] raw = new JWEInput(encoded).decrypt((RSAPrivateKey)keyPair.getPrivate()).getRawContent();
             String from = new String(raw);
             Assert.assertEquals(content, from);
          }
          {
             String encoded = new JWEBuilder().contentBytes(content.getBytes()).A128CBC_HS256().RSA1_5((RSAPublicKey)keyPair.getPublic());
             System.out.println("encoded: " + encoded);
             byte[] raw = new JWEInput(encoded).decrypt((RSAPrivateKey)keyPair.getPrivate()).getRawContent();
             String from = new String(raw);
             Assert.assertEquals(content, from);
          }
          {
             String encoded = new JWEBuilder().contentBytes(content.getBytes()).A128CBC_HS256().RSA_OAEP((RSAPublicKey)keyPair.getPublic());
             System.out.println("encoded: " + encoded);
             byte[] raw = new JWEInput(encoded).decrypt((RSAPrivateKey)keyPair.getPrivate()).getRawContent();
             String from = new String(raw);
             Assert.assertEquals(content, from);
          }
       }

       @Test
       public void testDirect() throws Exception
       {
          String content = "Live long and prosper.";
          String encoded = new JWEBuilder().contentBytes(content.getBytes()).dir("geheim");
          System.out.println("encoded: " + encoded);
          byte[] raw = new JWEInput(encoded).decrypt("geheim").getRawContent();
          String from = new String(raw);
          Assert.assertEquals(content, from);

       }

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