在Java中,當使用Cipher
類進行加密和解密操作時,可能會遇到一些常見的錯誤。為了幫助您更好地處理這些錯誤并進行調試,我將列舉一些常見的錯誤及其解決方法。
try {
SecretKeySpec secretKey = new SecretKeySpec(keyBytes, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, secretKey);
} catch (InvalidKeyException e) {
System.err.println("Invalid key length: " + e.getMessage());
}
try {
Cipher cipher = Cipher.getInstance("AES");
} catch (NoSuchAlgorithmException e) {
System.err.println("Algorithm not found: " + e.getMessage());
}
try {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
} catch (NoSuchPaddingException e) {
System.err.println("Padding not found: " + e.getMessage());
}
try {
byte[] decryptedData = cipher.doFinal(encryptedData);
} catch (BadPaddingException e) {
System.err.println("Bad padding: " + e.getMessage());
}
try {
byte[] encryptedData = cipher.doFinal(plainData);
} catch (IllegalBlockSizeException e) {
System.err.println("Invalid block size: " + e.getMessage());
}
try {
IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);
} catch (InvalidAlgorithmParameterException e) {
System.err.println("Invalid algorithm parameter: " + e.getMessage());
}
要調試這些錯誤,請首先檢查您的代碼以確保您正確地設置了密鑰、算法和填充模式。然后,使用try-catch語句捕獲上述異常,并在catch塊中打印相關錯誤信息。這將幫助您更好地了解問題所在,從而找到解決方案。