我正在尝试加密在服务器上发送的语音文件。我使用以下过程：
将语音记录到文件>将文件转换为字节数组>使用生成的密钥加密字节数组>将密钥保存到字符串>上传字节数组>从服务器加载文件>将其转换为字节数组>使用生成的密钥解密<- ，我得到一个错误
javax.crypto.AEADBadTagException: error:1e000065:Cipher functions:OPENSSL_internal:BAD_DECRYPT
2019-07-02 17:20:51.771 25417-25448/cz.magician.justtalk W/System.err: at java.lang.reflect.Constructor.newInstance0(Native Method)
2019-07-02 17:20:51.771 25417-25448/cz.magician.justtalk W/System.err: at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
2019-07-02 17:20:51.771 25417-25448/cz.magician.justtalk W/System.err: at com.android.org.conscrypt.OpenSSLCipher$EVP_AEAD.throwAEADBadTagExceptionIfAvailable(OpenSSLCipher.java:1200)
2019-07-02 17:20:51.771 25417-25448/cz.magician.justtalk W/System.err: at com.android.org.conscrypt.OpenSSLCipher$EVP_AEAD.doFinalInternal(OpenSSLCipher.java:1229)
2019-07-02 17:20:51.771 25417-25448/cz.magician.justtalk W/System.err: at com.android.org.conscrypt.OpenSSLCipher.engineDoFinal(OpenSSLCipher.java:363)
2019-07-02 17:20:51.771 25417-25448/cz.magician.justtalk W/System.err: at javax.crypto.Cipher.doFinal(Cipher.java:2055)
如果我省略了发送到服务器的部分，则代码有效。如果我省略编码/解码，则代码有效。服务器没什么特别的，只是将接收到的文件保存到特定路径。
EncryptionUtility
package xxx;
import android.util.Base64;
import javax.crypto.*;
import javax.crypto.spec.GCMParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.nio.ByteBuffer;
import java.security.SecureRandom;
public class EncryptionUtility {
//File encryption
public static byte[] encryptData(SecretKey secretKey, byte[] data) throws Exception {
SecureRandom secureRandom = new SecureRandom();
byte[] iv = new byte[12];
secureRandom.nextBytes(iv);
Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
GCMParameterSpec parameterSpec = new GCMParameterSpec(128, iv);
cipher.init(Cipher.ENCRYPT_MODE, secretKey, parameterSpec);
byte [] encryptedData = cipher.doFinal(data);
ByteBuffer byteBuffer = ByteBuffer.allocate(4 + iv.length + encryptedData.length);
byteBuffer.putInt(iv.length);
byteBuffer.put(iv);
byteBuffer.put(encryptedData);
return byteBuffer.array();
}
//File decryption
public static byte[] decryptData(SecretKey secretKey, byte[] encryptedData) throws Exception {
ByteBuffer byteBuffer = ByteBuffer.wrap(encryptedData);
int noonceSize = byteBuffer.getInt();
if(noonceSize < 12 || noonceSize >= 16)
throw new IllegalArgumentException("Nonce size is incorrect. Make sure that the incoming data is an AES encrypted file.");
byte[] iv = new byte[noonceSize];
byteBuffer.get(iv);
byte[] cipherBytes = new byte[byteBuffer.remaining()];
byteBuffer.get(cipherBytes);
Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
GCMParameterSpec parameterSpec = new GCMParameterSpec(128, iv);
cipher.init(Cipher.DECRYPT_MODE, secretKey, parameterSpec);
return cipher.doFinal(cipherBytes);
}
//Internal - SecretKey
public static SecretKey generateSecretKey() {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128);
return kgen.generateKey();
}
catch (Exception exc){
exc.printStackTrace();
return null;
}
}
public static String parseSecretKeyToString(SecretKey secretKey){
return Base64.encodeToString(secretKey.getEncoded(), 0);
}
public static SecretKey parseStringToSecretKey(String secretKeyString){
try {
return new SecretKeySpec(Base64.decode(secretKeyString, 0), 0, 16, "AES");
}
catch (Exception exc){
return null;
}
}
}
加密代码
SecretKey key = EncryptionUtility.generateSecretKey();
String keyStr = EncryptionUtility.parseSecretKeyToString(key);
fileBytes.put(param, EncryptionUtility.encryptData(key, readToBytes(file)));
解密代码
new AsyncTask<Void, Void, byte[]>(){
@Override
protected byte[] doInBackground(Void... voids) {
try {
URLConnection connection = new URL("urltovoicefile").openConnection();
InputStream inputStream = connection.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int b;
while ((b = inputStream.read()) != -1){
baos.write(b);
}
byte[] result = baos.toByteArray();
return EncryptionUtility.decryptData(EncryptionUtility.parseStringToSecretKey(keyStr), result);
}
catch (Exception exc){
exc.printStackTrace();
}
return new byte[0];
}
@Override
protected void onPostExecute(byte[] result) {
try {
File file = new File(activity.getCacheDir().toString(), "read.m4a");
FileOutputStream out = new FileOutputStream(file);
out.write(result);
out.close();
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(file.getAbsolutePath());
mediaPlayer.prepare();
mediaPlayer.start();
}
catch (Exception exc){
exc.printStackTrace();
}
}
}.execute();
编辑： 上传文件字节数组：
/**
* Adds a upload file section to the request
*/
public void addFile(String fieldName, String fileName, byte[] fileBytes)
throws IOException {
writer.append("--" + boundary).append(LINE_FEED);
writer.append("Content-Disposition: form-data; name=\"" + fieldName
+ "\"; filename=\"" + fileName + "\"")
.append(LINE_FEED);
writer.append(
"Content-Type: " + URLConnection.guessContentTypeFromName(fileName))
.append(LINE_FEED);
writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
writer.append(LINE_FEED);
writer.flush();
outputStream.write(fileBytes);
outputStream.flush();
writer.append(LINE_FEED);
writer.flush();
}
//编辑此部分代码中的问题
/**
* Completes the request and receives response from the server.
* @return a list of Strings as response in case the server returned
* status OK, otherwise an exception is thrown.
*/
public String finish() throws IOException {
String response;
writer.append(LINE_FEED).flush(); //**THIS WAS ALREADY BEING ADDED BY uploadFile**
writer.append("--" + boundary + "--").append(LINE_FEED);
writer.close();
int status = httpConn.getResponseCode();
if (status == HttpURLConnection.HTTP_OK) {
BufferedInputStream in = new BufferedInputStream(httpConn.getInputStream());
response = inputStreamToString(in);
httpConn.disconnect();
}
else
throw new IOException("Server returned non-OK status: " + status);
return response;
}
感谢您的帮助。
答案 0 :(得分：0)
最后，问题出在我上传文件的工具中。我在每个文件后添加了CR / LF，然后在请求末尾添加了一个额外的CR / LF。删除它可以解决问题。