Java7中的身份验证加密

我想在我的代码中使用经过身份验证的加密。根据JDK的说法，Java7似乎支持AES/GCM/NoPadding

但是，我用下面的代码得到了下面的错误

错误：

java.security.NoSuchAlgorithmException: Cannot find any provider supporting AES/GCM/NoPadding
    at javax.crypto.Cipher.getInstance(Cipher.java:524)
    at CipherService.main(CipherService.java:25)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

Cipher c = Cipher.getInstance ("AES/GCM/NoPadding");
final int blockSize = c.getBlockSize();
final byte[] ivData = new byte[blockSize];
final SecureRandom rnd = SecureRandom.getInstance("SHA1PRNG");
rnd.nextBytes(ivData);
GCMParameterSpec params = new GCMParameterSpec(blockSize * Byte.SIZE, ivData);
SecureRandom sr = new SecureRandom();
byte[] aesKey = new byte[KEY_SIZE];
byte[] ciphertext;
byte[] head = "Head".getBytes();
byte[] data = "Data".getBytes();
sr.nextBytes(aesKey);
SecretKeySpec sks = new SecretKeySpec(aesKey, "AES");
c.init(Cipher.ENCRYPT_MODE, sks, params);
c.updateAAD(head);
ciphertext = c.doFinal(data);

代码：

java.security.NoSuchAlgorithmException: Cannot find any provider supporting AES/GCM/NoPadding
    at javax.crypto.Cipher.getInstance(Cipher.java:524)
    at CipherService.main(CipherService.java:25)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

Cipher c = Cipher.getInstance ("AES/GCM/NoPadding");
final int blockSize = c.getBlockSize();
final byte[] ivData = new byte[blockSize];
final SecureRandom rnd = SecureRandom.getInstance("SHA1PRNG");
rnd.nextBytes(ivData);
GCMParameterSpec params = new GCMParameterSpec(blockSize * Byte.SIZE, ivData);
SecureRandom sr = new SecureRandom();
byte[] aesKey = new byte[KEY_SIZE];
byte[] ciphertext;
byte[] head = "Head".getBytes();
byte[] data = "Data".getBytes();
sr.nextBytes(aesKey);
SecretKeySpec sks = new SecretKeySpec(aesKey, "AES");
c.init(Cipher.ENCRYPT_MODE, sks, params);
c.updateAAD(head);
ciphertext = c.doFinal(data);

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您需要使用加密提供程序，例如。一旦您在您的上下文中注册了它，那么您应该能够使用任何支持的算法。您的另一个选择是使用内置的Sun/Oracle提供的应用程序，但这违反了Java的观点，因为它能够在任何JVM上运行应用程序。

简而言之，您不能（正如Brett Pyke所说）。因为SunJCE加密提供程序（和Oracle）不包括AES/GCM实现。谢天谢地，它们至少包括了GCMParameterSpec

您仅有的两个选项（AFAIK）是加密提供程序和

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编辑/更新：Oracle JDK-8似乎提供了AES/GCM的有效实现。

谢谢！但是如何使用内置的Sun/Oracle提供的？有什么想法吗？不过有一个警告：Oracle JDK-8实现的AES/GCM比BouncyCastle纯Java AES/GCM实现（在Mac OS X Intel Core i5和i7上测试）慢整整一个数量级。然而，使用AES/CBC时，Oracle代码的速度大约是BouncyCastle的三倍。