title: How to get signature from this APK?
body: <p>Recently I met a weird apk. I can only get its correct signature MD5 with keytool on ubuntu with jdk-1.8</p>
  
  <p>Keytool on windows/osx/debian/centos doesn't work and shows input error.</p>
  
  <p>Openssl can convert the .RSA to PEM but the MD5 is not right (compare with the value from Android API).</p>
  
  <p>I also tried APK-Parser even apk-sig. Both of them cannot parse it.</p>
  
  <p>Anyone could tell me what's the problem?</p>
  
  <p><a href="https://www.dropbox.com/s/6vxrq2lrd9xse9s/com.chuangguansha.cgs2.apk?dl=0" rel="nofollow noreferrer">original apk</a></p>
  
  <p><a href="https://www.dropbox.com/s/3wb7g50jw7yod9e/CERT.RSA?dl=0" rel="nofollow noreferrer">.RSA from apk</a>
  <a href="https://i.stack.imgur.com/ImGQR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ImGQR.png" alt="enter image description here"></a></p>