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This module provides some more Pythonic support for SSL.
Object types:
SSLSocket -- subtype of socket.socket which does SSL over the socket
Exceptions:
SSLError -- exception raised for I/O errors
Functions:
cert_time_to_seconds -- convert time string used for certificate
notBefore and notAfter functions to integer
seconds past the Epoch (the time values
returned from time.time())
fetch_server_certificate (HOST, PORT) -- fetch the certificate provided
by the server running on HOST at port PORT. No
validation of the certificate is performed.
Integer constants:
SSL_ERROR_ZERO_RETURN
SSL_ERROR_WANT_READ
SSL_ERROR_WANT_WRITE
SSL_ERROR_WANT_X509_LOOKUP
SSL_ERROR_SYSCALL
SSL_ERROR_SSL
SSL_ERROR_WANT_CONNECT
SSL_ERROR_EOF
SSL_ERROR_INVALID_ERROR_CODE
The following group define certificate requirements that one side is
allowing/requiring from the other side:
CERT_NONE - no certificates from the other side are required (or will
be looked at if provided)
CERT_OPTIONAL - certificates are not required, but if provided will be
validated, and if validation fails, the connection will
also fail
CERT_REQUIRED - certificates are required, and will be validated, and
if validation fails, the connection will also fail
The following constants identify various SSL protocol variants:
PROTOCOL_SSLv2
PROTOCOL_SSLv3
PROTOCOL_SSLv23
PROTOCOL_TLS
PROTOCOL_TLS_CLIENT
PROTOCOL_TLS_SERVER
PROTOCOL_TLSv1
PROTOCOL_TLSv1_1
PROTOCOL_TLSv1_2
The following constants identify various SSL alert message descriptions as per
http://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-6
ALERT_DESCRIPTION_CLOSE_NOTIFY
ALERT_DESCRIPTION_UNEXPECTED_MESSAGE
ALERT_DESCRIPTION_BAD_RECORD_MAC
ALERT_DESCRIPTION_RECORD_OVERFLOW
ALERT_DESCRIPTION_DECOMPRESSION_FAILURE
ALERT_DESCRIPTION_HANDSHAKE_FAILURE
ALERT_DESCRIPTION_BAD_CERTIFICATE
ALERT_DESCRIPTION_UNSUPPORTED_CERTIFICATE
ALERT_DESCRIPTION_CERTIFICATE_REVOKED
ALERT_DESCRIPTION_CERTIFICATE_EXPIRED
ALERT_DESCRIPTION_CERTIFICATE_UNKNOWN
ALERT_DESCRIPTION_ILLEGAL_PARAMETER
ALERT_DESCRIPTION_UNKNOWN_CA
ALERT_DESCRIPTION_ACCESS_DENIED
ALERT_DESCRIPTION_DECODE_ERROR
ALERT_DESCRIPTION_DECRYPT_ERROR
ALERT_DESCRIPTION_PROTOCOL_VERSION
ALERT_DESCRIPTION_INSUFFICIENT_SECURITY
ALERT_DESCRIPTION_INTERNAL_ERROR
ALERT_DESCRIPTION_USER_CANCELLED
ALERT_DESCRIPTION_NO_RENEGOTIATION
ALERT_DESCRIPTION_UNSUPPORTED_EXTENSION
ALERT_DESCRIPTION_CERTIFICATE_UNOBTAINABLE
ALERT_DESCRIPTION_UNRECOGNIZED_NAME
ALERT_DESCRIPTION_BAD_CERTIFICATE_STATUS_RESPONSE
ALERT_DESCRIPTION_BAD_CERTIFICATE_HASH_VALUE
ALERT_DESCRIPTION_UNKNOWN_PSK_IDENTITY
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|||� n|jtkrv|j| � |S )z�Create a SSLContext object with default settings.
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|� | S )a/ Create a SSLContext object for Python stdlib modules
All Python stdlib modules shall use this function to create SSLContext
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compatibility.
Nzcertfile must be specified) r� re r� rv r� r� rP �load_cert_chainr� r� r� )
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d2dd�Zdd� Zdd � Zd d � Zd d � Zd!d"� Zd#d$� Zd%d&� Zd'd(� Zd3d*d+�Zd,d-� Zd.d/� ZdS )4r� a This class implements an interface on top of a low-level SSL object as
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``SSLContext.wrap_bio``. This class is typically used by framework authors
that want to implement asynchronous IO for SSL through memory buffers.
When compared to ``SSLSocket``, this object lacks the following features:
* Any form of network IO, including methods such as ``recv`` and ``send``.
* The ``do_handshake_on_connect`` and ``suppress_ragged_eofs`` machinery.
Nc C s& || _ |p | | j _|d k r"|| j _d S )N)�_sslobj�ownerr� )r� r� r� r� r# r# r$ r� G s zSSLObject.__init__c C s | j jS )z(The SSLContext that is currently in use.)r� r� )r� r# r# r$ r� N s zSSLObject.contextc C s || j _d S )N)r� r� )r� �ctxr# r# r$ r� S s c C s | j jS )z!The SSLSession for client socket.)r� r� )r� r# r# r$ r� W s zSSLObject.sessionc C s || j _d S )N)r� r� )r� r� r# r# r$ r� \ s c C s | j jS )z.Was the client session reused during handshake)r� �session_reused)r� r# r# r$ r� ` s zSSLObject.session_reusedc C s | j jS )z%Whether this is a server-side socket.)r� r� )r� r# r# r$ r� e s zSSLObject.server_sidec C s | j jS )z]The currently set server hostname (for SNI), or ``None`` if no
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zSSLSocket.__init__c C s | j S )N)r� )r� r# r# r$ r� 7 s zSSLSocket.contextc C s || _ || j_d S )N)r� r� r� )r� r� r# r# r$ r� ; s c C s | j dk r| j jS dS )z!The SSLSession for client socket.N)r� r� )r� r# r# r$ r� @ s
zSSLSocket.sessionc C s || _ | jd k r|| j_d S )N)r� r� r� )r� r� r# r# r$ r� F s
c C s | j dk r| j jS dS )z.Was the client session reused during handshakeN)r� r� )r� r# r# r$ r� L s
zSSLSocket.session_reusedc C s t d| jj ��d S )NzCan't dup() %s instances)r� rk r7 )r� r# r# r$ �dupR s z
SSLSocket.dupc C s d S )Nr# )r� �msgr# r# r$ � _checkClosedV s zSSLSocket._checkClosedc C s | j s| j� d S )N)r� r� )r� r# r# r$ �_check_connectedZ s zSSLSocket._check_connected� c C st | j � | jstd��y| jj||�S tk
rn } z.|jd tkr\| jr\|dk rVdS dS n� W Y dd}~X nX dS )zORead up to LEN bytes and return them.
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SSL_ERROR_EOFr� )r� rR r� �xr# r# r$ r� b s zSSLSocket.readc C s" | j � | jstd��| jj|�S )zhWrite DATA to the underlying SSL channel. Returns
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certificate was provided, but not validated.)r� r� r� r� )r� r� r# r# r$ r� } s zSSLSocket.getpeercertc C s* | j � | j stj r d S | jj� S d S )N)r� r� r[ r r� )r� r# r# r$ r� � s z SSLSocket.selected_npn_protocolc C s* | j � | j stj r d S | jj� S d S )N)r� r� r[ r r� )r� r# r# r$ r� � s z SSLSocket.selected_alpn_protocolc C s | j � | jsd S | jj� S d S )N)r� r� r� )r� r# r# r$ r� � s zSSLSocket.cipherc C s | j � | jsd S | jj� S )N)r� r� r� )r� r# r# r$ r� � s zSSLSocket.shared_ciphersc C s | j � | jsd S | jj� S d S )N)r� r� r� )r� r# r# r$ r� � s zSSLSocket.compressionc C sB | j � | jr0|dkr$td| j ��| jj|�S tj| ||�S d S )Nr z3non-zero flags not allowed in calls to send() on %s)r� r� rP rk r� r0 �send)r� r� �flagsr# r# r$ r� � s
zSSLSocket.sendc C sH | j � | jr td| j ��n&|d kr4tj| ||�S tj| |||�S d S )Nz%sendto not allowed on instances of %s)r� r� rP rk r0 �sendto)r� r� Z
flags_or_addr�addrr# r# r$ r� � s zSSLSocket.sendtoc O s t d| j ��d S )Nz&sendmsg not allowed on instances of %s)r� rk )r� r~ r r# r# r$ �sendmsg� s zSSLSocket.sendmsgc C s� | j � | jr�|dkr$td| j ��d}t|��L}|jd��6}t|�}x&||k rl| j||d � �}||7 }qHW W d Q R X W d Q R X ntj | ||�S d S )Nr z6non-zero flags not allowed in calls to sendall() on %s�B)
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memoryview�castrR r� r0 �sendall)r� r� r� r> ZviewZ byte_viewZamountr� r# r# r$ r� � s
"zSSLSocket.sendallc s, | j dkrt� j|||�S | j|||�S dS )z�Send a file, possibly by using os.sendfile() if this is a
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N)r� rf �sendfileZ_sendfile_use_send)r� �file�offsetr> )rk r# r$ r� � s
zSSLSocket.sendfilec C s@ | j � | jr.|dkr$td| j ��| j|�S tj| ||�S d S )Nr z3non-zero flags not allowed in calls to recv() on %s)r� r� rP rk r� r0 �recv)r� �buflenr� r# r# r$ r� � s
zSSLSocket.recvc C sf | j � |r |d kr t|�}n |d kr*d}| jrR|dkrFtd| j ��| j||�S tj| |||�S d S )Ni r z8non-zero flags not allowed in calls to recv_into() on %s)r� rR r� rP rk r� r0 � recv_into)r� r� �nbytesr� r# r# r$ r� � s
zSSLSocket.recv_intoc C s0 | j � | jr td| j ��ntj| ||�S d S )Nz'recvfrom not allowed on instances of %s)r� r� rP rk r0 �recvfrom)r� r� r� r# r# r$ r � s
zSSLSocket.recvfromc C s2 | j � | jr td| j ��ntj| |||�S d S )Nz,recvfrom_into not allowed on instances of %s)r� r� rP rk r0 �
recvfrom_into)r� r� r� r� r# r# r$ r s
zSSLSocket.recvfrom_intoc O s t d| j ��d S )Nz&recvmsg not allowed on instances of %s)r� rk )r� r~ r r# r# r$ �recvmsg s zSSLSocket.recvmsgc O s t d| j ��d S )Nz+recvmsg_into not allowed on instances of %s)r� rk )r� r~ r r# r# r$ � recvmsg_into s zSSLSocket.recvmsg_intoc C s | j � | jr| jj� S dS d S )Nr )r� r� r� )r� r# r# r$ r� s
zSSLSocket.pendingc C s | j � d | _tj| |� d S )N)r� r� r0 r� )r� Zhowr# r# r$ r� s zSSLSocket.shutdownc C s. | j r| j j� }d | _ |S tdt| � ��d S )NzNo SSL wrapper around )r� r� rP �str)r� �sr# r# r$ r� s
zSSLSocket.unwrapc C s$ | j r| j j� S tdt| � ��d S )NzNo SSL wrapper around )r� r� rP r )r� r# r# r$ r� $ s
z&SSLSocket.verify_client_post_handshakec C s d | _ tj| � d S )N)r� r0 � _real_close)r� r# r# r$ r * s zSSLSocket._real_closec C sF | j � | j� }z$|dkr(|r(| jd� | jj� W d| j|� X dS )z Perform a TLS/SSL handshake.g N)r� r� r� r� r� )r� �blockr� r# r# r$ r� . s
zSSLSocket.do_handshakec C s� | j rtd��| jr td��| jj| d| j�}t|| | jd�| _y>|rTt j
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r� d | _� Y nX d S )Nz!can't connect in server-side modez/attempt to connect already-connected SSLSocket!F)r� r� T)r� rP r� r� r� r� r� r� r� r0 �
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_real_connect9 s( zSSLSocket._real_connectc C s | j |d� dS )zQConnects to remote ADDR, and then wraps the connection in
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)r� r� r# r# r$ r R s zSSLSocket.connectc C s | j |d�S )zQConnects to remote ADDR, and then wraps the connection in
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)r� r� r# r# r$ r W s zSSLSocket.connect_exc C s. t j| �\}}| jj|| j| jdd�}||fS )z�Accepts a new connection from a remote client, and returns
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z SSLSocket.get_channel_bindingc C s | j dkrdS | j j� S )z�
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zSSLSocket.version)N)r� N)F)r )N)r )r N)r� r )Nr )r� r )Nr )F)r )1r7 r8 r9 ro r� r� r1 r2 r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r r r r r� r� r� r� r r� r
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rb td| |f ��Y n0X || dd� |�}||d |f|dd� �S dS )a� Return the time in seconds since the Epoch, given the timestring
representing the "notBefore" or "notAfter" date from a certificate
in ``"%b %d %H:%M:%S %Y %Z"`` strptime format (C locale).
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Month is one of: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UTC should be specified as GMT (see ASN1_TIME_print())
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Zcalendarr �index�titlerP )Z cert_timer
r ZmonthsZ time_formatZ month_numberZttr# r# r$ �cert_time_to_seconds� s
r z-----BEGIN CERTIFICATE-----z-----END CERTIFICATE-----c C s2 t tj| �dd�}td tj|d� d t d S )z[Takes a certificate in binary DER format and returns the
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r! r$ rP �strip�endswithr& rR r# Z decodebytes�encode)Zpem_cert_string�dr# r# r$ �PEM_cert_to_DER_cert� s
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C sd | \}}|dk rt }nt}t|||d�}t| ��&}|j|��}|jd�} W dQ R X W dQ R X t| �S )z�Retrieve the certificate from the server at the specified address,
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If 'ca_certs' is specified, validate the server cert against it.
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r� r� r� �hostZportr� r� r� ZsslsockZdercertr# r# r$ �get_server_certificate� s
r0 c C s t j| d�S )Nz <unknown>)�_PROTOCOL_NAMESrQ )Z
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r r r r r rh r rl r r r r r � ImportErrorr r r r r r �_convertr7 r r� r � __members__�itemsr1 �getattrr{ r� r. r/ r0 r1 r2 r3 r4 r5 r# r� r� r� Z socket_errorZHAS_TLS_UNIQUEr� r} r� rP r6 rJ rO rW rX r\ re rs rv rt r� r� Z _create_default_https_contextr. r� r� r� r� r r$ r& r( r- r0 r2 r# r# r# r$ �<module>[ s�
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