些SDK提供方需要我们提供打包APK时使用的包名和签名文件(xxxxxx.jks这个文件)MD5值，然后SDK服务端应该会进行比对保证商户调用的合法性。不然光靠包名是可以伪造的，怎么获取签名文件的MD5值？
方法一：
原先通过命令keytool -list -v -keystore test.jks 可以查看md5值，但是发现现在查看不了，只有SHA1和SHA256的
方法二：改成从androidstudio查看
在app的build.gradle中配置你们签名文件，怎么生成签名文件？
build-->Generate signed bundle\APK-->next -->Create new
android{
signingConfigs {
release {
keyAlias 'test'
storePassword '666666'
keyPassword '666666'
storeFile file('E:\\test.jks')
}
debug {
keyAlias 'test'
storePassword '666666'
keyPassword '666666'
storeFile file('E:\\test.jks')
}
}
}
右侧gradle Tasks里面双击signingReport就可以查看签名文件的MD5值了
获取后去掉 ：
方法三：从PackageInfo类中获取文章来源：https://www.toymoban.com/news/detail-706127.html
package com.chinapay.umsfacesdkdemo.utils;
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.util.ArrayList;
import java.util.HashMap;
/**
* 获取签名工具类
*/
public class AppSigning {
public final static String MD5 = "MD5";
public final static String SHA1 = "SHA1";
public final static String SHA256 = "SHA256";
private static HashMap<String, ArrayList<String>> mSignMap = new HashMap<>();
/**
* 返回一个签名的对应类型的字符串
*
* @param context
* @param type
* @return 因为一个安装包可以被多个签名文件签名，所以返回一个签名信息的list
*/
public static ArrayList<String> getSignInfo(Context context, String type) {
if (context == null || type == null) {
return null;
}
String packageName = context.getPackageName();
if (packageName == null) {
return null;
}
if (mSignMap.get(type) != null) {
return mSignMap.get(type);
}
ArrayList<String> mList = new ArrayList<String>();
try {
Signature[] signs = getSignatures(context, packageName);
for (Signature sig : signs) {
String tmp = "error!";
if (MD5.equals(type)) {
tmp = getSignatureByteString(sig, MD5);
} else if (SHA1.equals(type)) {
tmp = getSignatureByteString(sig, SHA1);
} else if (SHA256.equals(type)) {
tmp = getSignatureByteString(sig, SHA256);
}
mList.add(tmp);
}
} catch (Exception e) {
Log.e("e", e.getMessage());
}
mSignMap.put(type, mList);
return mList;
}
/**
* 获取签名sha1值
*
* @param context
* @return
*/
public static String getSha1(Context context) {
String res = "";
ArrayList<String> mlist = getSignInfo(context, SHA1);
if (mlist != null && mlist.size() != 0) {
res = mlist.get(0);
}
return res;
}
/**
* 获取签名MD5值
*
* @param context
* @return
*/
public static String getMD5(Context context) {
String res = "";
ArrayList<String> mlist = getSignInfo(context, MD5);
if (mlist != null && mlist.size() != 0) {
res = mlist.get(0);
}
return res;
}
/**
* 获取签名SHA256值
*
* @param context
* @return
*/
public static String getSHA256(Context context) {
String res = "";
ArrayList<String> mlist = getSignInfo(context, SHA256);
if (mlist != null && mlist.size() != 0) {
res = mlist.get(0);
}
return res;
}
/**
* 返回对应包的签名信息
*
* @param context
* @param packageName
* @return
*/
private static Signature[] getSignatures(Context context, String packageName) {
PackageInfo packageInfo = null;
try {
packageInfo = context.getPackageManager().getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
return packageInfo.signatures;
} catch (Exception e) {
Log.e("e", e.toString());
}
return null;
}
/**
* 获取相应的类型的字符串（把签名的byte[]信息转换成16进制）
*
* @param sig
* @param type
* @return
*/
private static String getSignatureString(Signature sig, String type) {
byte[] hexBytes = sig.toByteArray();
String fingerprint = "error!";
try {
MessageDigest digest = MessageDigest.getInstance(type);
if (digest != null) {
byte[] digestBytes = digest.digest(hexBytes);
StringBuilder sb = new StringBuilder();
for (byte digestByte : digestBytes) {
sb.append((Integer.toHexString((digestByte & 0xFF) | 0x100)).substring(1, 3));
}
fingerprint = sb.toString();
}
} catch (Exception e) {
Log.e("e", e.toString());
}
return fingerprint;
}
/**
* 获取相应的类型的字符串（把签名的byte[]信息转换成 95:F4:D4:FG 这样的字符串形式）
*
* @param sig
* @param type
* @return
*/
private static String getSignatureByteString(Signature sig, String type) {
byte[] hexBytes = sig.toByteArray();
String fingerprint = "error!";
try {
MessageDigest digest = MessageDigest.getInstance(type);
if (digest != null) {
byte[] digestBytes = digest.digest(hexBytes);
StringBuilder sb = new StringBuilder();
for (byte digestByte : digestBytes) {
sb.append(((Integer.toHexString((digestByte & 0xFF) | 0x100)).substring(1, 3)).toUpperCase());
sb.append(":");
}
fingerprint = sb.substring(0, sb.length() - 1).toString();
}
} catch (Exception e) {
Log.e("e", e.toString());
}
return fingerprint;
}
}
调用上面的 String md5=AppSigning.getMD5(MainActivity.this)就可以了文章来源地址https://www.toymoban.com/news/detail-706127.html
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