Generate push certificate using fast lane, and create additional p12 for use in the Keychain Access app

generate_push_certificate.sh

# Generate push certificates.
# Usage: generate_push_certificate <app-bundle-id> <user-email> <cert-password>
generate_push_certificate() {
    app=$1
    user=$2
    password=$3

    fastlane pem -a "$app" -u "$user" -p "$password"
    convert_push_certificate_to_keychain_format "production_${app}_ios.p12" "$password"
}

# Convert p12 to Keychain acceptable format.
# Usage: convert_push_certificate_to_keychain_format <cert-file.p12> <cert-password>
convert_push_certificate_to_keychain_format() {
    cert=$1
    password=$2

    /opt/homebrew/opt/openssl@1.1/bin/openssl pkcs12 -in "$cert" -out temp.pem -passin pass:"$password" -passout pass:"$password"
    /opt/homebrew/opt/openssl@1.1/bin/openssl pkcs12 -export -in temp.pem -out "keychain_$cert"  -passin pass:"$password" -passout pass:"$password"
    rm temp.pem
}