4096 SHA256:b5y-somestuff/blablablaRY mobile@company.com (RSA)

> org.eclipse.jgit.api.errors.InvalidRemoteException: Invalid remote: origin
Cause: git@github.com:company/Project.git: ERROR: You're using an RSA key with SHA-1, which is no longer allowed. Please use a newer client or a different key type.
Please see <github-blog>/2021-09-01-improving-git-protocol-security-github/ for more information.

class SshTransportConfigCallback(val project: Project): TransportConfigCallback {

    override fun configure(transport: Transport?) {

        val sshTransport = transport as? SshTransport
        sshTransport?.sshSessionFactory = object: JschConfigSessionFactory() {

            override fun configure(hc: OpenSshConfig.Host?, session: Session?) {
                session?.setConfig("StrictHostKeyChecking", "no") // doesn't change anything
                session?.setConfig("server_host_key","ecdsa-sha2-nistp256") // doesn't change anything
            }

            override fun createDefaultJSch(fs: FS?): JSch {
                val jSch = super.createDefaultJSch(fs)

                val pathBitriseSshKey = "/root/.ssh/bitrise_step_activate_ssh_key"

                if (File(pathBitriseSshKey).exists()) {
                    jSch.addIdentity(pathBitriseSshKey)
                } else {
                    val userHome = System.getProperty("user.home", project.gradle.gradleUserHomeDir.parent)
                    val localPrivateKey = "${userHome}/.ssh/our_valid_rsa_sha256_key"
                    jSch.addIdentity(localPrivateKey)
                }

                val pathBitriseKnownHosts = "/root/.ssh/known_hosts"
                if (File(pathBitriseKnownHosts).exists()) {
                    jSch.setKnownHosts(pathBitriseKnownHosts)
                } else {
                    val userHome = System.getProperty("user.home", project.gradle.gradleUserHomeDir.parent)
                    val localKnownHosts = "${userHome}/.ssh/known_hosts"
                    jSch.setKnownHosts(localKnownHosts)
                }

                return jSch
            }
        }
    }
}