/*
* Copyright 2015 Hippo Seven
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hippo.util;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import android.util.Log;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public final class PackageUtils {
private static final String TAG = PackageUtils.class.getSimpleName();
public static String getSignature(Context context, String packageName) {
try {
@SuppressLint("PackageManagerGetSignatures")
PackageInfo pi = context.getPackageManager().getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
Signature[] ss = pi.signatures;
if (ss != null && ss.length >= 1) {
return computeSHA1(ss[0].toByteArray());
} else {
Log.e(TAG, "Can't find signature in package " + packageName);
}
} catch (Exception e) {
Log.e(TAG, "Can't find package " + packageName, e);
}
return null;
}
/**
* @return looks like A1:43:6B:34... or null
*/
public static String computeSHA1(final byte[] certRaw) {
StringBuilder sb = new StringBuilder(59);
MessageDigest md;
try {
md = MessageDigest.getInstance("SHA1");
byte[] sha1 = md.digest(certRaw);
int length = sha1.length;
for (int i = 0; i < length; i++) {
if (i != 0) {
sb.append(':');
}
byte b = sha1[i];
String appendStr = Integer.toString(b & 0xff, 16);
if (appendStr.length() == 1) {
sb.append(0);
}
sb.append(appendStr);
}
return sb.toString().toUpperCase();
}
catch (NoSuchAlgorithmException ex) {
Log.e(TAG, "Can't final Algorithm SHA1", ex);
return null;
}
}
}