try {
PackageManager manager=getPackageManager()
PackageInfo packageInfo=manager.getPackageInfo(getPackageName(), PackageManager.GET_SIGNATURES);
Signature[] signs = packageInfo.signatures;
Signature sign = signs[0];
return parseSignature(sign.toByteArray());
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
public static String 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();
return null;
}
}
获取到以上信息可以用来做签名比对。
非android环境下获取签名信息：
private char[] toChars(byte[] mSignature) {
byte[] sig = mSignature;
final int N = sig.length;
final int N2 = N*2;
char[] text = new char[N2];
for(int j=0;j
byte v = sig[j];
int d = (v>>4)&0xf;
text[j*2] = (char)(d >= 10 ? ('a' + d - 10) : ('0' + d));
d = v&0xf;
text[j*2+1] = (char)(d >= 10 ? ('a' + d - 10) : ('0' + d));
}
return text;
}
private java.security.cert.Certificate[] loadCertificates(JarFile jarFile, JarEntry je, byte[] readBuffer) {
try {
InputStream is = jarFile.getInputStream(je);
while(is.read(readBuffer,0,readBuffer.length)!=-1) {
}
is.close();
return (java.security.cert.Certificate[])(je!=null?je.getCertificates():null);
} catch (Exception e) {
e.printStackTrace();
System.err.println("Exception reading "+je.getName()+" in "+jarFile.getName()+": "+e);
}
return null;
}
public String getApkSignInfo(String apkFilePath){
byte[] readBuffer = new byte[8192];
java.security.cert.Certificate[] certs = null;
try{
JarFile jarFile = new JarFile(apkFilePath);
Enumeration entries = jarFile.entries();
while(entries.hasMoreElements()){
JarEntry je = (JarEntry)entries.nextElement();
if(je.isDirectory()){
continue;
}
if(je.getName().startsWith("META-INF/")){
continue;
}
java.security.cert.Certificate[] localCerts = loadCertificates(jarFile,je,readBuffer);
System.out.println("File " + apkFilePath + " entry " + je.getName()+ ": certs=" + certs + " ("+ (certs != null ? certs.length : 0) + ")");
if (certs == null) {
certs = localCerts;
}else{
for(int i=0; i
boolean found = false;
for (int j = 0; j < localCerts.length; j++) {
if (certs[i] != null && certs[i].equals(localCerts[j])) {
found = true;
break;
}
}
if (!found || certs.length != localCerts.length) {
jarFile.close();
return null;
}
}
}
}
jarFile.close();
return new String(toChars(certs[0].getEncoded()));
}catch(Exception e){
e.printStackTrace();
}
return null;
}