以下是我的加密邏輯。雖然我的IV是16字節長,但我仍然遇到IV無效的錯誤。希望得到任何幫助AES 256位加密 - java.security.InvalidAlgorithmParameterException:錯誤IV長度:必須爲16字節長
@Override
public String encrypt(String dataToEncrypt, String IV) throws Exception{
if(encryptionKey.length() < 10){
encryptionKey = generateEncryptionKey().toString();
}
System.out.println("number of IV bytes is "+IV.length()+" "+IV);
Cipher cipher = Cipher.getInstance(encrpytionAlgo);
SecretKey key = new SecretKeySpec(encryptionKey.getBytes(Charset.forName("UTF-8")), "AES");
cipher.init(Cipher.ENCRYPT_MODE, key,new IvParameterSpec(IV.getBytes(Charset.forName("UTF-8"))));
byte[] encryptedTextBytes = cipher.doFinal(dataToEncrypt.getBytes(Charset.forName("UTF-8")));
return new Base64().encodeAsString(encryptedTextBytes);
}
IV和密鑰生成邏輯
@Override
public String generateRandomIV(){
Random random = new SecureRandom();
byte[] iv = new byte[16];
random.nextBytes(iv);
System.out.println("IV is "+Base64.encodeBase64(iv)+" "+ com.sun.jersey.core.util.Base64.base64Decode(new String(Base64.encodeBase64(iv)))+ " number of bytes is "+iv.length);
return new String(Base64.encodeBase64(iv));
}
@Override
public SecretKey generateEncryptionKey(){
KeyGenerator aesKey = null;
try {
aesKey = KeyGenerator.getInstance("AES");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
aesKey.init(256);
SecretKey secretKey = aesKey.generateKey();
System.out.println("Encryption key is "+ new Base64().encode(secretKey.getEncoded()));
return secretKey;
}
下面是例外 異常堆棧跟蹤是行:
cipher.init(Cipher.ENCRYPT_MODE,鑰匙,新IvParameterSpec (IV.getBytes(Charset.forName( 「UTF-8」))));
java.security.InvalidAlgorithmParameterException: Wrong IV length: must be 16 bytes long
at com.sun.crypto.provider.SunJCE_f.a(DashoA13*..)
at com.sun.crypto.provider.AESCipher.engineInit(DashoA13*..)
at javax.crypto.Cipher.a(DashoA13*..)
at javax.crypto.Cipher.a(DashoA13*..)
at javax.crypto.Cipher.init(DashoA13*..)
at javax.crypto.Cipher.init(DashoA13*..)
at com.intuit.platform.publiccloudaccess.core.services.EncryptionServiceImpl.encrypt(EncryptionServiceImpl.java:47)
我建議你保持你的IV作爲一個字節[]。通常,將UTF-8字符串轉換爲字節數組並不會爲每個字符提供一個字節。爲什麼你想要轉換到/從一個字符串的開銷呢? – Rob 2014-12-08 04:57:33
感謝@Rob工作。 – outtoexplore 2014-12-18 18:24:04