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Mail protocol support.
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�DomainDeliveryBaseaN
A base class for message delivery using the domains of a mail service.
@ivar service: See L{__init__}
@ivar user: See L{__init__}
@ivar host: See L{__init__}
@type protocolName: L{bytes}
@ivar protocolName: The protocol being used to deliver the mail.
Sub-classes should set this appropriately.
Ns not-implemented-protocol� protocolNamec C s || _ || _|| _dS )z�
@type service: L{MailService}
@param service: A mail service.
@type user: L{bytes} or L{None}
@param user: The authenticated SMTP user.
@type host: L{bytes}
@param host: The hostname.
N)�service�user�host)�selfr r r � r �8/usr/lib/python3/dist-packages/twisted/mail/protocols.py�__init__% s
zDomainDeliveryBase.__init__c C s� d }}| j rd| j �d� }|d rd|d }d|d d |d d | | }d
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Generate a received header string for a message.
@type helo: 2-L{tuple} of (L{bytes}, L{bytes})
@param helo: The client's identity as sent in the HELO command and its
IP address.
@type origin: L{Address}
@param origin: The origination address of the message.
@type recipients: L{list} of L{User}
@param recipients: The destination addresses for the message.
@rtype: L{bytes}
@return: A received header string.
� s auth=�xtextr s helo=s from s ([� � ]s by s with s (�ascii� )s for <� s > s
Received: s
)
r �encoder r r �join�map�bytesr �
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recipients�authStr�heloStr�fromUser�by�forUserr r r �receivedHeader4 s. $�������
�z!DomainDeliveryBase.receivedHeaderc C sX | j r | jjr | jj�|jjd�}|du r t�| jd�}n| jj|jj }t �
|j |�S )a9
Validate the address for which a message is destined.
@type user: L{User}
@param user: The destination address.
@rtype: L{Deferred <defer.Deferred>} which successfully fires with
no-argument callable which returns L{IMessage <smtp.IMessage>}
provider.
@return: A deferred which successfully fires with a no-argument
callable which returns a message receiver for the destination.
@raise SMTPBadRcpt: When messages cannot be accepted for the
destination address.
NT) r r �queue�domains�get�dest�domainr
� DomainQueuerr �
maybeDeferred�exists)r r �dr r r �
validateToY s �z DomainDeliveryBase.validateToc C s8 |s t �|dd��|jdkr|jdkrt �|dd��|S )a�
Validate the address from which a message originates.
@type helo: 2-L{tuple} of (L{bytes}, L{bytes})
@param helo: The client's identity as sent in the HELO command and its
IP address.
@type origin: L{Address}
@param origin: The origination address of the message.
@rtype: L{Address}
@return: The origination address.
@raise SMTPBadSender: When messages cannot be accepted from the
origination address.
i� z Who are you? Say HELO first.r i� z#Sender address must contain domain.)r �
SMTPBadSender�localr/ )r r" r# r r r � validateFromr s
z DomainDeliveryBase.validateFrom)�__name__�
__module__� __qualname__�__doc__r r r �__annotations__r �DNSNAMEr r* r4 r7 r r r r r
s
% r
c @ � e Zd ZdZdZdS )�SMTPDomainDeliveryzA
A domain delivery base class for use in an SMTP server.
s smtpN�r8 r9 r: r; r r r r r r? � � r? c @ r> )�ESMTPDomainDeliveryzB
A domain delivery base class for use in an ESMTP server.
s esmtpNr@ r r r r rB � rA rB c @ s, e Zd ZdZejZdZddd�Zdd� Z dS )� SMTPFactorya;
An SMTP server protocol factory.
@ivar service: See L{__init__}
@ivar portal: See L{__init__}
@type protocol: no-argument callable which returns a L{Protocol
<protocol.Protocol>} subclass
@ivar protocol: A callable which creates a protocol. The default value is
L{SMTP}.
Nc C s t j�| � || _|| _dS )z�
@type service: L{MailService}
@param service: An email service.
@type portal: L{Portal <twisted.cred.portal.Portal>} or
L{None}
@param portal: A portal to use for authentication.
N)r rC r r �portal)r r rD r r r r � s
zSMTPFactory.__init__c C s2 t �d|� �� tj�| |�}| j|_| j|_|S )a
Create an instance of an SMTP server protocol.
@type addr: L{IAddress <twisted.internet.interfaces.IAddress>} provider
@param addr: The address of the SMTP client.
@rtype: L{SMTP}
@return: An SMTP protocol.
zConnection from )r �msgr rC �
buildProtocolr rD �r �addr�pr r r rF � s
zSMTPFactory.buildProtocol)N)
r8 r9 r: r; r �SMTPr rD r rF r r r r rC � s
rC c @ s* e Zd ZdZejZdZdd� Zdd� Z dS )� ESMTPFactorya
An ESMTP server protocol factory.
@type protocol: no-argument callable which returns a L{Protocol
<protocol.Protocol>} subclass
@ivar protocol: A callable which creates a protocol. The default value is
L{ESMTP}.
@type context: L{IOpenSSLContextFactory
<twisted.internet.interfaces.IOpenSSLContextFactory>} or L{None}
@ivar context: A factory to generate contexts to be used in negotiating
encrypted communication.
@type challengers: L{dict} mapping L{bytes} to no-argument callable which
returns L{ICredentials <twisted.cred.credentials.ICredentials>}
subclass provider.
@ivar challengers: A mapping of acceptable authorization mechanism to
callable which creates credentials to use for authentication.
Nc G s t j| g|�R � dti| _dS )zk
@param args: Arguments for L{SMTPFactory.__init__}
@see: L{SMTPFactory.__init__}
s CRAM-MD5N)rC r r � challengers)r �argsr r r r � s zESMTPFactory.__init__c C s t �| |�}| j|_| j|_|S )a
Create an instance of an ESMTP server protocol.
@type addr: L{IAddress <twisted.internet.interfaces.IAddress>} provider
@param addr: The address of the ESMTP client.
@rtype: L{ESMTP}
@return: An ESMTP protocol.
)rC rF rL �context�ctxrG r r r rF � s
zESMTPFactory.buildProtocol)
r8 r9 r: r; r �ESMTPr rN r rF r r r r rK � s rK c @ s0 e Zd ZdZdZdZdd� Zdd� Zdd � ZdS )
� VirtualPOP3a[
A virtual hosting POP3 server.
@type service: L{MailService}
@ivar service: The email service that created this server. This must be
set by the service.
@type domainSpecifier: L{bytes}
@ivar domainSpecifier: The character to use to split an email address into
local-part and domain. The default is '@'.
N� @c C sZ | � |�\}}z| j�|�}W n ty t�t� � Y S w |�t� | j
||�dtj �S )a1
Perform APOP authentication.
Override the default lookup scheme to allow virtual domains.
@type user: L{bytes}
@param user: The name of the user attempting to log in.
@type digest: L{bytes}
@param digest: The challenge response.
@rtype: L{Deferred} which successfully results in 3-L{tuple} of
(L{IMailbox <pop3.IMailbox>}, L{IMailbox <pop3.IMailbox>}
provider, no-argument callable)
@return: A deferred which fires when authentication is complete.
If successful, it returns an L{IMailbox <pop3.IMailbox>} interface,
a mailbox and a logout function. If authentication fails, the
deferred fails with an L{UnauthorizedLogin
<twisted.cred.error.UnauthorizedLogin>} error.
N) � lookupDomainr � lookupPortal�KeyErrorr �failr �loginr �APOPCredentials�magic�IMailbox)r r �digestr/ rD r r r �authenticateUserAPOP s ��z VirtualPOP3.authenticateUserAPOPc C sT | � |�\}}z| j�|�}W n ty t�t� � Y S w |�t||�dt j
�S )aY
Perform authentication for a username/password login.
Override the default lookup scheme to allow virtual domains.
@type user: L{bytes}
@param user: The name of the user attempting to log in.
@type password: L{bytes}
@param password: The password to authenticate with.
@rtype: L{Deferred} which successfully results in 3-L{tuple} of
(L{IMailbox <pop3.IMailbox>}, L{IMailbox <pop3.IMailbox>}
provider, no-argument callable)
@return: A deferred which fires when authentication is complete.
If successful, it returns an L{IMailbox <pop3.IMailbox>} interface,
a mailbox and a logout function. If authentication fails, the
deferred fails with an L{UnauthorizedLogin
<twisted.cred.error.UnauthorizedLogin>} error.
N) rS r rT rU r rV r rW r r rZ )r r �passwordr/ rD r r r �authenticateUserPASS+ s �z VirtualPOP3.authenticateUserPASSc C sX z |� | jd�\}}W n ty d}Y nw || jjvr(t�d�|�d����||fS )a�
Check whether a domain is among the virtual domains supported by the
mail service.
@type user: L{bytes}
@param user: An email address.
@rtype: 2-L{tuple} of (L{bytes}, L{bytes})
@return: The local part and the domain part of the email address if the
domain is supported.
@raise POP3Error: When the domain is not supported by the mail service.
r r zno such domain {}zutf-8) �split�domainSpecifier�
ValueErrorr r, r � POP3Error�format�decode)r r r/ r r r rS H s � zVirtualPOP3.lookupDomain) r8 r9 r: r; r r` r\ r^ rS r r r r rQ � s rQ c @ s( e Zd ZdZeZdZdd� Zdd� ZdS )� POP3Factorya
A POP3 server protocol factory.
@ivar service: See L{__init__}
@type protocol: no-argument callable which returns a L{Protocol
<protocol.Protocol>} subclass
@ivar protocol: A callable which creates a protocol. The default value is
L{VirtualPOP3}.
Nc C s
|| _ dS )zY
@type service: L{MailService}
@param service: An email service.
N)r )r r r r r r n s
zPOP3Factory.__init__c C s t j�| |�}| j|_|S )a
Create an instance of a POP3 server protocol.
@type addr: L{IAddress <twisted.internet.interfaces.IAddress>} provider
@param addr: The address of the POP3 client.
@rtype: L{POP3}
@return: A POP3 protocol.
)r �
ServerFactoryrF r rG r r r rF u s
zPOP3Factory.buildProtocol) r8 r9 r: r; rQ r r r rF r r r r re _ s re N) r; �zope.interfacer �twisted.copyrightr �twisted.cred.credentialsr r �twisted.cred.errorr �twisted.internetr r � twisted.mailr r
r �twisted.pythonr �IMessageDeliveryr
r? rB rC rK �POP3rQ rf re r r r r �<module> s u.1f