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Editorial Team
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Asked: 2026-06-10T03:53:22+00:00

I have an app deployed on Goole’s Play Store that uses Facebook SSO login.

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I have an app deployed on Goole’s Play Store that uses Facebook SSO login. The main problem is that I haven’t checked the keyhash before submitting it and I don’t have the computer I made that build with anymore (therefore no debug.keystore, but I still have the certificate I signed the apk with).

I tried to unzip the APK, go to META-INF and extract the file CERT.RSA… from there I used the command: keytool -printcert -file CERT.RSA | openssl sha1 -binary | openssl base64

but the output is wrong (it’s a keyhash I already have in the facebook app settings).

I would like to avoid making an update just for that problem, considering I could solve it just setting the right keyhash in the facebook app settings.

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1 Answer

  1. Editorial Team

    ok, the problem was the alias inside the certificate. Found the right one to use, everything worked as a charm.

    The final command line was:

    keytool -exportcert -alias user_alias -keystore dev_certificate | openssl sha1 -binary | openssl base64
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