@brief SSH authentication callback.
@param session Current session handler
@param user User that wants to authenticate
@param password Password used for authentication
@param userdata Userdata to be passed to the callback function.
@returns SSH_AUTH_SUCCESS Authentication is accepted.
@returns SSH_AUTH_PARTIAL Partial authentication, more authentication means are needed.
@returns SSH_AUTH_DENIED Authentication failed.
@brief SSH authentication callback. @param session Current session handler @param user User that wants to authenticate @param password Password used for authentication @param userdata Userdata to be passed to the callback function. @returns SSH_AUTH_SUCCESS Authentication is accepted. @returns SSH_AUTH_PARTIAL Partial authentication, more authentication means are needed. @returns SSH_AUTH_DENIED Authentication failed.