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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_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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namedtuple( t closing( t OPENSSL_VERSION_NUMBERt OPENSSL_VERSION_INFOt OPENSSL_VERSION( t _SSLContext( t SSLErrort SSLZeroReturnErrort SSLWantReadErrort SSLWantWriteErrort SSLSyscallErrort SSLEOFError( t CERT_NONEt
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sh Matching according to RFC 6125, section 6.4.3
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| | d f � � n t d � � d S( s) Verify that *cert* (in decoded format as returned by
SSLSocket.getpeercert()) matches the *hostname*. RFC 2818 and RFC 6125
rules are followed, but IP addresses are not accepted for *hostname*.
CertificateError is raised on failure. On success, the function
returns nothing.
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NOTE: The protocol and settings may change anytime without prior
deprecation. The values represent a fair balance between maximum
compatibility and security.
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All Python stdlib modules shall use this function to create SSLContext
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is less restrict than create_default_context()'s to increase backward
compatibility.
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provides read and write methods over that channel.i c C s
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r� } | j d t k r� | j r� | d k r� d Sd Sq� � n Xd S( sO Read up to LEN bytes and return them.
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c C s2 | j � | j s" t d � � n | j j | � S( sh Write DATA to the underlying SSL channel. Returns
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c C s$ | j � | j � | j j | � S( s� Returns a formatted version of the data in the
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certificate was provided, but not validated.( R R R� t peer_certificate( R� t binary_form( ( s /usr/lib64/python2.7/ssl.pyt getpeercert� s
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c C s� | j � | j r{ | d k r5 t d | j � � n t | � } d } x- | | k rv | j | | � } | | 7} qJ W| St j | | | � Sd S( Ni s6 non-zero flags not allowed in calls to sendall() on %s( R R� RX R RZ R R+ t sendall( R� R R� t amountR> R ( ( s /usr/lib64/python2.7/ssl.pyR s
i c C sY | j � | j rB | d k r5 t d | j � � n | j | � S| j j | | � Sd S( Ni s3 non-zero flags not allowed in calls to recv() on %s( R R� RX R R� R� R� ( R� t buflenR� ( ( s /usr/lib64/python2.7/ssl.pyR� s
c C s� | j � | r+ | d k r+ t | � } n | d k r@ d } n | j r{ | d k rk t d | j � � n | j | | � S| j j | | | � Sd S( Ni i s8 non-zero flags not allowed in calls to recv_into() on %s( R Rh RZ R� RX R R� R� t recv_into( R� R t nbytesR� ( ( s /usr/lib64/python2.7/ssl.pyR s
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c C s' | j � d | _ t j | | � d S( N( R Rh R� R+ t shutdown( R� t how( ( s /usr/lib64/python2.7/ssl.pyR D s
c C s; | j d k r( d | _ t j | � n | j d 8_ d S( Ni ( R� Rh R� R+ R� ( R� ( ( s /usr/lib64/python2.7/ssl.pyR� I s c C s? | j r% | j j � } d | _ | St d t | � � � d S( Ns No SSL wrapper around ( R� R Rh RX t str( R� t s( ( s /usr/lib64/python2.7/ssl.pyt unwrapP s
c C s d | _ t j | � d S( N( Rh R� R+ t _real_close( R� ( ( s /usr/lib64/python2.7/ssl.pyR% X s c C s� | j � | j � } z3 | d k r; | r; | j d � n | j j � Wd | j | � X| j j r� | j s~ t d � � n t
| j � | j � n d S( s Perform a TLS/SSL handshake.g Ns- check_hostname needs server_hostname argument( R R� R� Rh R� R� R� R� R� RX Ra R ( R� t blockR� ( ( s /usr/lib64/python2.7/ssl.pyR� \ s
c C s� | j r t d � � n | j r0 t d � � n | j j | j t | j d | �| _ ya | ru t j
| | � } n d } t j | | � | s� t
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r� d | _ � n Xd S( Ns! can't connect in server-side modes/ attempt to connect already-connected SSLSocket!R� ( R� RX R� R� R� R� R< R� R� R+ t
connect_exRh t connectRv R� R� R� ( R� R R' t rc( ( s /usr/lib64/python2.7/ssl.pyt
_real_connectm s$ ' c C s | j | t � d S( sQ Connects to remote ADDR, and then wraps the connection in
an SSL channel.N( R* R< ( R� R ( ( s /usr/lib64/python2.7/ssl.pyR( � s c C s | j | t � S( sQ Connects to remote ADDR, and then wraps the connection in
an SSL channel.( R* Rv ( R� R ( ( s /usr/lib64/python2.7/ssl.pyR' � s c C sI t j | � \ } } | j j | d | j d | j d t �} | | f S( s� Accepts a new connection from a remote client, and returns
a tuple containing that new connection wrapped with a server-side
SSL channel, and the address of the remote client.R� R� R� ( R+ t acceptR� R� R� R� Rv ( R� t newsockR ( ( s /usr/lib64/python2.7/ssl.pyR+ � s t ri����c C s% | j d 7_ t | | | d t �S( s� Make and return a file-like object that
works with the SSL connection. Just use the code
from the socket module.i R� ( R� R, Rv ( R� t modet bufsize( ( s /usr/lib64/python2.7/ssl.pyt makefile� s s
tls-uniquec C s_ | t k r t d � � n | d k r? t d j | � � � n | j d k rR d S| j j � S( s� Get channel binding data for current connection. Raise ValueError
if the requested `cb_type` is not supported. Return bytes of the data
or None if the data is not available (e.g. before the handshake).
s Unsupported channel binding types
tls-uniques( {0} channel binding type not implementedN( t CHANNEL_BINDING_TYPESRX R� t formatR� Rh t
tls_unique_cb( R� t cb_type( ( s /usr/lib64/python2.7/ssl.pyt get_channel_binding� s c C s | j d k r d S| j j � S( s�
Return a string identifying the protocol version used by the
current SSL channel, or None if there is no established channel.
N( R� Rh t version( R� ( ( s /usr/lib64/python2.7/ssl.pyR6 � s N(+ R8 R9 Rx Rh R< R R� Rv R2 R3 R� t propertyR� t setterR R R R� R
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rv t d | | f � � n3 X| | d | � } | | d | f | d d !� Sd S( s� 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).
"notBefore" or "notAfter" dates must use UTC (RFC 5280).
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())
i����( t strptime( t timegmt Jant Febt Mart Aprt Mayt Junt Jult Augt Sept Octt Novt Decs %d %H:%M:%S %Y GMTi i s* time data %r does not match format "%%b%s"i i i N( R; R< R= R> R? R@ RA RB RC RD RE RF ( t timeR9 t calendarR: t indext titleRX ( t cert_timeR9 R: t monthst time_formatt month_numbert tt( ( s /usr/lib64/python2.7/ssl.pyt cert_time_to_seconds� s
!
s -----BEGIN CERTIFICATE-----s -----END CERTIFICATE-----c C s< t j | � j d � } t d t j | d � d t d S( s[ Takes a certificate in binary DER format and returns the
PEM version of it as a string.R� s
i@ ( t base64t standard_b64encodet decodet
PEM_HEADERt textwrapt fillt
PEM_FOOTER( t der_cert_bytest f( ( s /usr/lib64/python2.7/ssl.pyt DER_cert_to_PEM_cert� s c C s� | j t � s" t d t � � n | j � j t � sJ t d t � � n | j � t t � t t � !} t j | j d d � � S( sh Takes a certificate in ASCII PEM format and returns the
DER-encoded version of it as a byte sequences( Invalid PEM encoding; must start with %ss& Invalid PEM encoding; must end with %st ASCIIt strict(
R RT RX t stript endswithRW RZ RQ t decodestringR� ( t pem_cert_stringt d( ( s /usr/lib64/python2.7/ssl.pyt PEM_cert_to_DER_cert� s
c
C s� | \ } } | d k r! t } n t } t | d | d | �} t t | � � �4 } t | j | � � � } | j t � } Wd QXWd QXt | � S( s� Retrieve the certificate from the server at the specified address,
and return it as a PEM-encoded string.
If 'ca_certs' is specified, validate the server cert against it.
If 'ssl_version' is specified, use it in the connection attempt.R� Rk N(
Rh R R t _create_stdlib_contextR R4 R� R Rv RZ (
R R� R� t hostt portR� R� R� t sslsockt dercert( ( s /usr/lib64/python2.7/ssl.pyt get_server_certificate s c C s t j | d � S( Ns <unknown>( t _PROTOCOL_NAMESRY ( t
protocol_code( ( s /usr/lib64/python2.7/ssl.pyt get_protocol_name s c C s� t | d � r | j } n t t � } | s3 | rF | j | | � n | j | d t �} y | j � Wn t k
r| n X| j � | S( s� A replacement for the old socket.ssl function. Designed
for compability with Python 2.5 and earlier. Will disappear in
Python 3.0.R� R� (
t hasattrR� R| R� R� R� R< R� R� R� ( R� R� R� R� R� ( ( s /usr/lib64/python2.7/ssl.pyt sslwrap_simple s
(b Rx RU RB R� Rd t collectionsR t
contextlibR R R R R R R R R R R
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R R R R R R Rp R Rs R R R R R$ R% R& R' R t itemsRi t PROTOCOL_SSLv2R� t NameErrorRh R+ R, R- R. R� R� R0 R1 R2 R3 R4 R5 R6 RQ R� t HAS_TLS_UNIQUER1 R� R� RX R7 RS Ra Rb Rc Rm R{ R� R� R| R� R� R< R� R� R� t _get_https_context_factoryR� Rv R� R� Rc R� R� RP RT RW RZ Rb Rh Rk Rm ( ( ( s /usr/lib64/python2.7/ssl.pyt <module>X s� . "
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