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public
class
GetPublicKey { /** *
获取签名公钥 *
@param mContext *
@return */ protected
static
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); } return
signcode; } protected
static
String parseSignature(byte[]
signature) { String
sign = ""; try
{ CertificateFactory
certFactory = CertificateFactory .getInstance("X.509"); X509Certificate
cert = (X509Certificate) certFactory .generateCertificate(new
ByteArrayInputStream(signature)); String
pubKey = cert.getPublicKey().toString(); String
ss = subString(pubKey); ss
= ss.replace(",",
""); ss
= ss.toLowerCase(); int
aa = ss.indexOf("modulus"); int
bb = ss.indexOf("publicexponent"); sign
= ss.substring(aa + 8,
bb); }
catch
(CertificateException e) { Log.e(Constants.TAG,
e.getMessage(), e); } return
sign; } public
static
String subString(String sub) { Pattern
pp = Pattern.compile("\\s*|\t|\r|\n"); Matcher
mm = pp.matcher(sub); return
mm.replaceAll(""); }} |
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原文地址：http://blog.csdn.net/u014311022/article/details/42675473
