我正在创建一个应用程序,我必须从我身边加密xml并将其发送到服务器,作为响应,我将收到xml,我必须解密它。我不知道加密和解密。我的代码如下
<?xml version='1.0' encoding='utf-8'?><adm_auth_req><user_name>user.s7</user_name><password>gspcsmo</password></adm_auth_req>
我正在使用此代码对其进行加密和解密
public string encryptData(string key, string data)
{
int keyLen = key.Length;
int dataLen = Convert.ToInt16(data.Length);
char chData;
char chKey;
char[] data1 = data.ToCharArray();
char[] key1 = key.ToCharArray();
StringBuilder encryptedData = new StringBuilder();
for (int i = 0; i < dataLen; i++)
{
chData = data1[i];
for (int j = 0; j < keyLen; j++)
{
chKey = key1[j];
chData = (char)(chData ^ chKey);
}
encryptedData.Append(chData);
}
return (encryptedData.ToString());
}
但仍然徒劳无功。谁能告诉我如何加密它并解密结果?
答案 0 :(得分:3)
答案 1 :(得分:1)
答案 2 :(得分:1)
在我看来,你不应该尝试首先实现自定义算法,你要重新发明轮子,其次可能不会像其他更标准的加密例程那样安全。如果我是你,我会去看看一些优秀的Java加密库。我找到的就是http://www.bouncycastle.org/latest_releases.html
答案 3 :(得分:1)
答案 4 :(得分:1)
我使用DES算法进行加密和解密。
加密:加密后,我正在写文件保存。您可以使用其他(临时)名称保存它并将其发送到服务器。成功发送后,您可以删除此加密文件
FileOutputStream fos = null ;
CipherInputStream cis;
byte key[] = "abcdEFGH".getBytes();
SecretKeySpec secretKey = new SecretKeySpec(key,"DES");
Cipher encrypt = Cipher.getInstance("DES/ECB/PKCS5Padding");
encrypt.init(Cipher.ENCRYPT_MODE, secretKey);
InputStream fis = new ByteArrayInputStream(fileData);//Here I am getting file data as byte array. You can convert your file data to InputStream by other way too.
File dataFile = new File(dataDir,fileName); //dataDir is location where my file is stored
if(!dataFile.exists()){
cis = new CipherInputStream(fis,encrypt);
try {
fos = new FileOutputStream(dataFile);
byte[] b = new byte[8];
int i;
while ((i=cis.read(b)) != -1) {
fos.write(b, 0, i);
}
return fileName;
} finally{
try {
if(fos != null)
{
fos.flush();
fos.close();
}
cis.close();
fis.close();
} catch (IOException e) {
//IOException
}
}
}
return "";
解密:
CipherInputStream cis;
FileOutputStream fos = null;
FileInputStream fis = null;
File dataFile = new File(dataDir,fileName); // here I am getting encrypted file from server
File newDataFile = new File(dataDir,fileName+"_TEMP"); // I am creating temporary decrypted file
byte key[] = "abcdEFGH".getBytes();
SecretKeySpec secretKey = new SecretKeySpec(key,"DES");
Cipher decrypt = Cipher.getInstance("DES/ECB/PKCS5Padding");
decrypt.init(Cipher.DECRYPT_MODE, secretKey);
try {
fis = new FileInputStream(dataFile);
} catch(Exception e) {
//Exception
}
if(dataFile.exists()){
cis = new CipherInputStream(fis,decrypt);
try {
fos = new FileOutputStream(newDataFile);
byte[] b = new byte[8];
int i;
while ((i=cis.read(b)) != -1) {
fos.write(b, 0, i);
}
return newDataFile;
} finally{
try {
if(fos != null)
{
fos.flush();
fos.close(); }
cis.close();
fis.close();
} catch (IOException e) {
//IOException
}
}
}