How to get the SHA1 Signing certificate fingerprint?

Question

I created a self-signed digital certificate (.p12 / Type: 2048-RSA) with Adobe Air to sign my Android app. How to get the SHA1 signing certificate fingerprint for it?

Answer 1

You first need to convert your cert from .p12 (pkcs12) to binary .der (DER) format to achieve this. The simplest method I can find is to use this tool.

Alternatively, you can do this yourself by first generating a PEM cert and then the DER cert using these commands:

openssl pkcs12 -in your_certificate.p12 -out your_certificate.pem
openssl rsa -inform PEM -outform DER -in your_certificate.pem -out your_certificate.der

Once you have your DER you can generate the SHA1 like this:

openssl dgst -sha1 your_certificate.der

Answer 2

This worked for me:

keytool -exportcert -keystore [YOUR_CERTIFICATE_PATH] -storepass [YOUR_CERT_PASSWORD]  -list -v -storetype PKCS12