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This function takes care of generating fresh private key, registering the account, optionally accepting CA Terms of Service and finally saving the account. It should be called prior to initialization of `Client`, unless account has already been created. :param .IConfig config: Client configuration. :param .AccountStorage account_storage: Account storage where newly registered account will be saved to. Save happens only after TOS acceptance step, so any account private keys or `.RegistrationResource` will not be persisted if `tos_cb` returns ``False``. :param tos_cb: If ACME CA requires the user to accept a Terms of Service before registering account, client action is necessary. For example, a CLI tool would prompt the user acceptance. `tos_cb` must be a callable that should accept `.RegistrationResource` and return a `bool`: ``True`` iff the Terms of Service present in the contained `.Registration.terms_of_service` is accepted by the client, and ``False`` otherwise. ``tos_cb`` will be called only if the client action is necessary, i.e. when ``terms_of_service is not None``. This argument is optional, if not supplied it will default to automatic acceptance! :raises certbot.errors.Error: In case of any client problems, in particular registration failure, or unaccepted Terms of Service. :raises acme.errors.Error: In case of any protocol problems. :returns: Newly registered and saved account, as well as protocol API handle (should be used in `Client` initialization). :rtype: `tuple` of `.Account` and `acme.client.Client` z*There are already existing accounts for %sNzLNo email was provided and --register-unsafely-without-email was not present.zRegistering without email!i)Zpublic_exponentZkey_sizeZbackend)r)Zfind_allÚloggerÚinforÚemailZregister_unsafely_without_emailÚwarningrÚErrorÚdry_runrÚ rsa_key_sizerÚjoseZJWKRSAZComparableRSAKeyr"Úperform_registrationr ZAccountZreport_new_accountÚsaverZhandle_subscription) rZaccount_storageÚtos_cbÚmsgZrsa_keyrÚacmerZaccr r r!Úregisterus0&    ý      rYc Csú|jo |j}|r<|jjj ¡}tjj||j|j|jj d}nd}|  ¡rZ|sZd}t   |¡‚z tj j|j|d}| ||¡WStj k rô}zZ|jdks¢|jdkrâ|jr¾d|j}t   |¡‚qätjdd |_t|||ƒWY¢ Sn‚W5d}~XYnXdS) aj Actually register new account, trying repeatedly if there are email problems :param acme.client.Client client: ACME client object. :param .IConfig config: Client configuration. :param Callable tos_cb: a callback to handle Term of Service agreement. :returns: Registration Resource. :rtype: `acme.messages.RegistrationResource` )Úaccount_public_keyZkidZhmac_keyÚ directoryNzRServer requires external account binding. 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NcCsr||_||_||_||_|dkr>|jdk r>t||jj|jjƒ}||_|dk rht  ||j|j|jj ¡|_nd|_dS)zInitialize a client.N) rr Úauthr.r"rrrXr Z AuthHandlerZ pref_challs)rCrZaccount_r`r.rXr r r!rDüsÿzClient.__init__cCs |jdkr"d}t |¡t |¡‚|jjdkr8t d¡‚t d|¡|dkr\|j|j dd}t j   ¡t j dd}|j  ||¡}t |j¡\}}| ¡| ¡fS) aWObtain certificate. :param .util.CSR csr: PEM-encoded Certificate Signing Request. 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