android获取APK签名信息及MD5指纹

1.获取APK的签名信息

private String showUninstallAPKSignatures(String apkPath) {

String PATH_PackageParser = "android.content.pm.PackageParser";

try {

// apk包的文件路径

// 这是一个Package 解释器, 是隐藏的

// 构造函数的参数只有一个, apk文件的路径

// PackageParser packageParser = new PackageParser(apkPath);

Class pkgParserCls = Class.forName(PATH_PackageParser);

Class[] typeArgs = new Class[1];

typeArgs[0] = String.class;

Constructor pkgParserCt = pkgParserCls.getConstructor(typeArgs);

Object[] valueArgs = new Object[1];

valueArgs[0] = apkPath;

Object pkgParser = pkgParserCt.newInstance(valueArgs);

MediaApplication.logD(DownloadApk.class, "pkgParser:" + pkgParser.toString());

// 这个是与显示有关的, 里面涉及到一些像素显示等等, 我们使用默认的情况

DisplayMetrics metrics = new DisplayMetrics();

metrics.setToDefaults();

// PackageParser.Package mPkgInfo = packageParser.parsePackage(new

// File(apkPath), apkPath,

// metrics, 0);

typeArgs = new Class[4];

typeArgs[0] = File.class;

typeArgs[1] = String.class;

typeArgs[2] = DisplayMetrics.class;

typeArgs[3] = Integer.TYPE;

Method pkgParser_parsePackageMtd = pkgParserCls.getDeclaredMethod("parsePackage",

typeArgs);

valueArgs = new Object[4];

valueArgs[0] = new File(apkPath);

valueArgs[1] = apkPath;

valueArgs[2] = metrics;

valueArgs[3] = PackageManager.GET_SIGNATURES;

Object pkgParserPkg = pkgParser_parsePackageMtd.invoke(pkgParser, valueArgs);

typeArgs = new Class[2];

typeArgs[0] = pkgParserPkg.getClass();

typeArgs[1] = Integer.TYPE;

Method pkgParser_collectCertificatesMtd = pkgParserCls.getDeclaredMethod

("collectCertificates",

typeArgs);

valueArgs = new Object[2];

valueArgs[0] = pkgParserPkg;

valueArgs[1] = PackageManager.GET_SIGNATURES;

pkgParser_collectCertificatesMtd.invoke(pkgParser, valueArgs);

// 应用程序信息包, 这个公开的, 不过有些函数, 变量没公开

Field packageInfoFld = pkgParserPkg.getClass().getDeclaredField("mSignatures");

Signature[] info = (Signature[]) packageInfoFld.get(pkgParserPkg);

MediaApplication.logD(DownloadApk.class, "size:"+info.length);

MediaApplication.logD(DownloadApk.class, info[0].toCharsString());

return info[0].toCharsString();

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

获取程序自身的签名：

private String getSign(Context context) {

PackageManager pm = context.getPackageManager();

List<PackageInfo> apps = pm.getInstalledPackages(PackageManager.GET_SIGNATURES);

Iterator<PackageInfo> iter = apps.iterator();

while(iter.hasNext()) {

PackageInfo packageinfo = iter.next();

String packageName = packageinfo.packageName;

if (packageName.equals(instance.getPackageName())) {

MediaApplication.logD(DownloadApk.class, packageinfo.signatures[0].toCharsString());

return packageinfo.signatures[0].toCharsString();

}

return null;

}

对比2个方法的返回值来判断APK升级包的签名是否一致，一致就提示可以安装。

2.获取指定已安装完整签名信息,包括MD5指纹：

public void getSingInfo() {

try {

PackageInfo packageInfo = getPackageManager().getPackageInfo("com.sina,weibo",

PackageManager.GET_SIGNATURES);

Signature[] signs = packageInfo.signatures;

Signature sign = signs[0];

parseSignature(sign.toByteArray());

} catch (Exception e) {

e.printStackTrace();

}

public void parseSignature(byte[] signature) {

try {

CertificateFactory certFactory = CertificateFactory.getInstance("X.509");

X509Certificate cert = (X509Certificate) certFactory.generateCertificate(new

ByteArrayInputStream(signature));

String pubKey = cert.getPublicKey().toString();

String signNumber = cert.getSerialNumber().toString();

System.out.println("signName:" + cert.getSigAlgName());

System.out.println("pubKey:" + pubKey);

System.out.println("signNumber:" + signNumber);

System.out.println("subjectDN:"+cert.getSubjectDN().toString());

} catch (CertificateException e) {

e.printStackTrace();

}

3.如何查看指定证书的指纹

D:>keytool -list -alias 在导出时程序的别名(-alias 这个命令，好像不用也行，没有试，反正我一直都在使用) -keystore tangshan.keystore(导出时使用的证书名称) -storepass 123456-keypass 123456

出的结果为：

在导出时程序的别名, 2011-7-29, PrivateKeyEntry,

认证指纹 (MD5)： 90:13:AF:46:0A:DC:5C:6C:77:0E:AA:AF:DA:8A:AB:72

获取 Apk 签名信息

首先在下载「wandoujia-tools.jar」程序包到本地，在控制台输入诸如这行命令（无换行）

java -cp ~/Downloads/wandoujia-tools.jar com.wandoujia.tools.ApkSignatureToolsMain " ~/Downloads/youku.apk"

特别注意，其中粗体部分分别表示您下载的 wandoujia-tools.jar 所在目录和你想要分析的那个 Apk 的完整路径，其他部分不变。执行后会看到这样两句：

signatureMd5=b791ac2c93d279c4a52b6bcc68c5c32e

md5=b5ed58fa6fbb460c9b618fccfcc8cb37

分别表示签名 MD5 和文件 MD5 字符串。

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