Java 如何在Android上使用SHA-256
我需要加密我的Android API调用。我需要用SHA-256 我已经尝试过从中向您介绍这个示例,但它似乎不适用于Android,我还从中导入了Jar文件 这是我的密码:Java 如何在Android上使用SHA-256,java,android,http,hex,sha,Java,Android,Http,Hex,Sha,我需要加密我的Android API调用。我需要用SHA-256 我已经尝试过从中向您介绍这个示例,但它似乎不适用于Android,我还从中导入了Jar文件 这是我的密码: package com.example.api_tester; import javax.crypto.Mac; import javax.crypto.spec.SecretKeySpec; import org.apache.commons.codec.binary.Hex; import android.os.B
package com.example.api_tester;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Hex;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Window;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
public static final String TAG = MainActivity.class.getSimpleName();
APICall api;
ApiSecurity hash_security;
TextView url;
TextView api_result;
TextView url_call;
private String hardCodedUrl = " MY API URL";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Hide Action Bar min target apit set to 11
getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
getActionBar().hide();
setContentView(R.layout.activity_main);
Log.i(TAG, "onCreate");
...
test();
}//end - onCreate
private void test(){
try {
String secret = "acbdef";
String message = "api_key=abcd123&access_token=123abc";
Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes(), "HmacSHA256");
sha256_HMAC.init(secret_key);
String hash = Hex.encodeHexString(sha256_HMAC.doFinal(message.getBytes()));
Log.e(TAG, "Result=> " + hash);
}
catch (Exception e) {
Log.e(TAG, "Error=> " + e);
}
}//end test
...
这是我得到的厄洛尔:
09-12 13:39:42.676: E/AndroidRuntime(13531): java.lang.NoSuchMethodError: org.apache.commons.codec.binary.Hex.encodeHexString
谢谢各位。你们正在使用
对于java,您可以这样做
MessageDigest digest = MessageDigest.getInstance("SHA-256");
byte[] hash = digest.digest(text.getBytes("UTF-8"));
似乎您缺少了“encodeHexString”方法—与其包含整个jar,不如使用任何简单的实现。。。例如:
private final static char[] hexArray = "0123456789abcdef".toCharArray();
private static String encodeHexString(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
int v;
for (int j = 0; j < bytes.length; j++) {
v = bytes[j] & 0xFF;
hexChars[j * 2] = hexArray[v >>> 4];
hexChars[j * 2 + 1] = hexArray[v & 0x0F];
}
return new String(hexChars);
}
private final static char[]hexArray=“0123456789abcdef.tocharray();
私有静态字符串encodeHexString(字节[]字节){
char[]hexChars=新字符[bytes.length*2];
INTV;
对于(int j=0;j>>4];
hexChars[j*2+1]=hexArray[v&0x0F];
}
返回新字符串(hexChars);
}
private final static char[] hexArray = "0123456789abcdef".toCharArray();
private static String encodeHexString(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
int v;
for (int j = 0; j < bytes.length; j++) {
v = bytes[j] & 0xFF;
hexChars[j * 2] = hexArray[v >>> 4];
hexChars[j * 2 + 1] = hexArray[v & 0x0F];
}
return new String(hexChars);
}