本文整理汇总了Java中org.bouncycastle.crypto.modes.GCMBlockCipher.processAADBytes方法的典型用法代码示例。如果您正苦于以下问题：Java GCMBlockCipher.processAADBytes方法的具体用法？Java GCMBlockCipher.processAADBytes怎么用？Java GCMBlockCipher.processAADBytes使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.bouncycastle.crypto.modes.GCMBlockCipher的用法示例。
在下文中一共展示了GCMBlockCipher.processAADBytes方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: decrypt
import org.bouncycastle.crypto.modes.GCMBlockCipher; //导入方法依赖的package包/类
/**
* Returns decrypted data.
*
* @param key
* @param nonce nonce/ IV
* @param header
* @param encryptedData
* @param tag
* @param optional optional AADBytes (post header)
* @return decrypted data
* @throws IllegalArgumentException on decryption exceptions
* @throws NullPointerException on null arguments
*/
public static byte[] decrypt(
byte[] key,
byte[] nonce,
byte[] header,
byte[] encryptedData,
byte[] tag,
Optional<byte[]> optional) {
try {
GCMBlockCipher cipher = new GCMBlockCipher(new AESFastEngine());
AEADParameters parameters = new AEADParameters(new KeyParameter(key), tag.length * 8, nonce, header);
cipher.init(false, parameters);
if (optional.isPresent()) {
byte[] aadBytes = optional.get();
cipher.processAADBytes(aadBytes, 0, aadBytes.length);
}
byte[] out = new byte[cipher.getOutputSize(encryptedData.length + tag.length)];
int pos = cipher.processBytes(encryptedData, 0, encryptedData.length, out, 0);
pos += cipher.processBytes(tag, 0, tag.length, out, pos);
pos += cipher.doFinal(out, pos);
return Arrays.copyOf(out, pos);
} catch (IllegalStateException | InvalidCipherTextException | RuntimeCryptoException ex) {
throw new IllegalStateException("GCM decrypt error", ex);
}
}
示例2: checkTestCase
import org.bouncycastle.crypto.modes.GCMBlockCipher; //导入方法依赖的package包/类
private void checkTestCase(
GCMBlockCipher encCipher,
GCMBlockCipher decCipher,
String testName,
byte[] SA,
byte[] P,
byte[] C,
byte[] T)
throws InvalidCipherTextException
{
byte[] enc = new byte[encCipher.getOutputSize(P.length)];
if (SA != null)
{
encCipher.processAADBytes(SA, 0, SA.length);
}
int len = encCipher.processBytes(P, 0, P.length, enc, 0);
len += encCipher.doFinal(enc, len);
if (enc.length != len)
{
// System.out.println("" + enc.length + "/" + len);
fail("encryption reported incorrect length: " + testName);
}
byte[] mac = encCipher.getMac();
byte[] data = new byte[P.length];
System.arraycopy(enc, 0, data, 0, data.length);
byte[] tail = new byte[enc.length - P.length];
System.arraycopy(enc, P.length, tail, 0, tail.length);
if (!areEqual(C, data))
{
fail("incorrect encrypt in: " + testName);
}
if (!areEqual(T, mac))
{
fail("getMac() returned wrong mac in: " + testName);
}
if (!areEqual(T, tail))
{
fail("stream contained wrong mac in: " + testName);
}
byte[] dec = new byte[decCipher.getOutputSize(enc.length)];
if (SA != null)
{
decCipher.processAADBytes(SA, 0, SA.length);
}
len = decCipher.processBytes(enc, 0, enc.length, dec, 0);
len += decCipher.doFinal(dec, len);
mac = decCipher.getMac();
data = new byte[C.length];
System.arraycopy(dec, 0, data, 0, data.length);
if (!areEqual(P, data))
{
fail("incorrect decrypt in: " + testName);
}
}