Question about getting an Android hashie

PackageInfo info = ctx.getPackageManager().getPackageInfo(getAppPackageName(ctx), PackageManager.GET_SIGNATURES);

Doesn't the above statement mean to get the app's unique sign value?

Is it wrong that I understand?

It was a measure to encrypt md with the obtained sign value and use the secret key of aes...

How come if the project has that function, they'll all the same results...It's a mental breakdown ;;

I understood the encryption part, but I'm asking because the above two lines seem to be misunderstanding.

Masters! I'd appreciate it if you could give me an answer.

Below is the full text of the hashish import function created by someone.

/**

*/

public static String getPackageHashKey(Context ctx) {

try {

PackageInfo info = ctx.getPackageManager().getPackageInfo(getAppPackageName(ctx), PackageManager.GET_SIGNATURES);

for (Signature signature : info.signatures) {

MessageDigest md = MessageDigest.getInstance("SHA");

md.update(signature.toByteArray());

return Base64.encodeToString(md.digest(), Base64.DEFAULT);

}

} catch (PackageManager.NameNotFoundException ex) {

ex.printStackTrace();

} catch (NoSuchAlgorithmException ex) {

ex.printStackTrace();

} catch (Exception ex) {

ex.printStackTrace();

}

return null;

}