本文介绍了Android的:如何创建HMAC MD5字符串?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想创建一个Android MD5哈希字符串等于C#code波纹管:
I am trying to create an android MD5 hash string to equal the C# code bellow:
private string CalculateHMACMd5(string message, string key)
{
System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
byte[] keyByte = encoding.GetBytes(key);
HMACMD5 hmacmd5 = new HMACMD5(keyByte);
byte[] messageBytes = encoding.GetBytes(message);
byte[] hashmessage = hmacmd5.ComputeHash(messageBytes);
string HMACMd5Value = ByteToString(hashmessage);
return HMACMd5Value;
}
private static string ByteToString(byte[] buff)
{
string sbinary = "";
for (int i = 0; i < buff.Length; i++)
{
sbinary += buff[i].ToString("X2");
}
return (sbinary);
}
安卓code,我目前使用[ 不产生相同的C#code 的]:
Android code that I currently use [not generating the same C# code]:
public static String sStringToHMACMD5(String sData, String sKey)
{
SecretKeySpec key;
byte[] bytes;
String sEncodedString = null;
try
{
key = new SecretKeySpec((sKey).getBytes(), "ASCII");
Mac mac = Mac.getInstance("HMACMD5");
mac.init(key);
mac.update(sData.getBytes());
bytes = mac.doFinal(sData.getBytes());
StringBuffer hash = new StringBuffer();
for (int i=0; i<bytes.length; i++) {
String hex = Integer.toHexString(0xFF & bytes[i]);
if (hex.length() == 1) {
hash.append('0');
}
hash.append(hex);
}
sEncodedString = hash.
return sEncodedString;
}
在此先感谢。
Thanks in advance.
推荐答案
定义不工作。例外?产量不如预期?等等。
Define 'not working'. Exception? Output not as expected?, etc.
一个明显的一点是,你是处理相同的数据两次:
One obvious thing is that you are processing the same data twice:
mac.update(sData.getBytes());
bytes = mac.doFinal(sData.getBytes());
要处理所有的数据在一通,只需要使用 doFinal()
(假设它不是太大)。另一件事,可能是错是关键的格式:是什么的字符串SKEY
的格式。理想情况下,你应该使用base64连接codeD字符串,而不是调用的getString()
。
To process all data in one pass, just use doFinal()
(assuming it's not too big).Another thing that can be wrong is the format of the key: what is the format of String sKey
. Ideally you should be using a BASE64 encoded string, not calls to getString()
.
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