Android 获取签名、公钥方法

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1. [代码][Java]代码

01private byte[] getSign(Context context) {
02        PackageManager pm = context.getPackageManager();
03        List<PackageInfo> apps = pm
04                .getInstalledPackages(PackageManager.GET_SIGNATURES);
05        Iterator<PackageInfo> iter = apps.iterator();
06 
07        while (iter.hasNext()) {
08            PackageInfo info = iter.next();
09            String packageName = info.packageName;
10            //按包名 取签名
11            if (packageName.equals("com.test.test")) {
12                return info.signatures[0].toByteArray();
13                 
14            }
15        }
16        return null;
17    }

2. [代码][Java]代码

01public static String getPublicKey(byte[] signature) {
02        try {
03 
04            CertificateFactory certFactory = CertificateFactory
05                    .getInstance("X.509");
06            X509Certificate cert = (X509Certificate) certFactory
07                    .generateCertificate(new ByteArrayInputStream(signature));
08 
09            String publickey = cert.getPublicKey().toString();
10            publickey = publickey.substring(publickey.indexOf("modulus: ") + 9,
11                    publickey.indexOf("\n", publickey.indexOf("modulus:")));
12 
13            Log.d("TRACK", publickey);
14            return publickey;
15        } catch (CertificateException e) {
16            e.printStackTrace();
17        }
18        return null;
19    }
20    

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