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