Android 获取签名、公钥方法

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private byte[] getSign(Context context) {PackageManager pm = context.getPackageManager();List<PackageInfo> apps = pm.getInstalledPackages(PackageManager.GET_SIGNATURES);Iterator<PackageInfo> iter = apps.iterator();while (iter.hasNext()) {PackageInfo info = iter.next();String packageName = info.packageName;//按包名 取签名if (packageName.equals("com.test.test")) {return info.signatures[0].toByteArray();} }return null;}

public static String getPublicKey(byte[] signature) {try {CertificateFactory certFactory = CertificateFactory.getInstance("X.509");X509Certificate cert = (X509Certificate) certFactory.generateCertificate(new ByteArrayInputStream(signature));String publickey = cert.getPublicKey().toString();publickey = publickey.substring(publickey.indexOf("modulus: ") + 9,publickey.indexOf("\n", publickey.indexOf("modulus:")));Log.d("TRACK", publickey);return publickey;} catch (CertificateException e) {e.printStackTrace();}return null;}

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