How to compare certificates of two apps

Question

Let say that I have different certificates A-certificate and B-certificate, and I sign 3 apps (one with A , and two with B)

How can I check form application signed with certificate B that the other app is also signed with B (not with A)

I need some method that will programmatically check if some app is signed with the same certificate as some other app

the method stub should look like this

public boolean sameCertificate(String packagename1,String packagename2){
//some comparison
//return true/false
}

score 1 · Answer 1 · answered May 18 '15 at 14:38

1

public boolean sameCertificate(Context context, String packageName1, String packageName2) {
    return context.getPackageManager().checkSignatures(packageName1, packageName2) == PackageManager
            .SIGNATURE_MATCH;
}

answered May 18 '15 at 14:38

David Vávra

18,446
7
48
56

score -2 · Accepted Answer · edited May 23 '17 at 10:26

-2

The easiest way is to not even need to check yourself -- just give both of those apps the same shared user id in your manifests; that way Android will enforce that they must be signed alike.

If you prefer the manual approach, you can get an application's signature using the PackageManager. How to get APK signing signature? shows you more details.

edited May 23 '17 at 10:26

Community

1
1

answered Mar 27 '13 at 11:04

mah

39,056
9
76
93

How to compare certificates of two apps

2 Answers2