Android 获取签名公钥

[1].[代码] [Java]代码 跳至 [1]

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publicclass GetPublicKey {

     

    /**

     * 获取签名公钥

     * @param mContext

     * @return

     */

    protectedstatic String getSignInfo(Context mContext) {

        String signcode = "";

        try{

            PackageInfo packageInfo = mContext.getPackageManager().getPackageInfo(

                    GetAppInfo.getPackageName(mContext), PackageManager.GET_SIGNATURES);

            Signature[] signs = packageInfo.signatures;

            Signature sign = signs[0];

 

            signcode = parseSignature(sign.toByteArray());

            signcode = signcode.toLowerCase();

        }catch(Exception e) {

            Log.e(Constants.TAG, e.getMessage(), e);

        }

        returnsigncode;

    }

 

    protectedstatic String parseSignature(byte[] signature) {

        String sign = "";

        try{

            CertificateFactory certFactory = CertificateFactory

                    .getInstance("X.509");

            X509Certificate cert = (X509Certificate) certFactory

                    .generateCertificate(newByteArrayInputStream(signature));

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

            String ss = subString(pubKey);

            ss = ss.replace(",","");

            ss = ss.toLowerCase();

            intaa = ss.indexOf("modulus");

            intbb = ss.indexOf("publicexponent");

            sign = ss.substring(aa + 8, bb);

        }catch(CertificateException e) {

            Log.e(Constants.TAG, e.getMessage(), e);

        }

        returnsign;

    }

 

    publicstatic String subString(String sub) {

        Pattern pp = Pattern.compile("\\s*|\t|\r|\n");

        Matcher mm = pp.matcher(sub);

        returnmm.replaceAll("");

    }

}