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h f + @ s d Z d d l Z d d l Z d d l Z d d l Z d d l m Z d d l m Z d d l
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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_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
N)
namedtuple)Enum)OPENSSL_VERSION_NUMBEROPENSSL_VERSION_INFOOPENSSL_VERSION) _SSLContext)SSLErrorSSLZeroReturnErrorSSLWantReadErrorSSLWantWriteErrorSSLSyscallError SSLEOFError) CERT_NONE
CERT_OPTIONAL
CERT_REQUIRED)txt2objnid2obj) RAND_statusRAND_add
RAND_bytesRAND_pseudo_bytes)RAND_egdc C sC x< t t D]. } | j | r
t t | t | s r+ )PROTOCOL_SSLv2ZSSLv2)PROTOCOL_TLSv1_1PROTOCOL_TLSv1_2zTLSv1.1zTLSv1.2win32)enum_certificates enum_crls)socketAF_INET SOCK_STREAMcreate_connection)
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__module__ __qualname__r r r r r8 s r8 c C sD g } | s d S| j d ^ } } | j d } | | k rY t d t | n | su | j | j k S| d k r | j d nY | j d s | j d r | j t j | n" | j t j | j d d x$ | D] } | j t j | q Wt j
d d
j | d t j } | j
| S) zhMatching according to RFC 6125, section 6.4.3
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F.*z,too many wildcards in certificate DNS name: z[^.]+zxn--z\*z[^.]*z\Az\.z\Z)splitcountr8 reprlowerappendr reescapereplacecompilejoin
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&rL c C s[ | s t d n g } | j d f } xC | D]; \ } } | d k r4 t | | r_ d S| j | q4 q4 W| s xc | j d f D]L } xC | D]; \ } } | d k r t | | r d S| j | q q Wq Wn t | d k r t d | d j t t | f n; t | d k rKt d
| | d f n t d d S)
a) Verify that *cert* (in decoded format as returned by
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ztempty or no certificate, match_hostname needs a SSL socket or SSL context with either CERT_OPTIONAL or CERT_REQUIREDZsubjectAltNameZDNSNZsubjectZ
commonNamer< z&hostname %r doesn't match either of %sz, z hostname %r doesn't match %rr z=no appropriate commonName or subjectAltName fields were found)
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r r< N) r get_default_verify_pathsosenvironrN rU pathisfileisdir)partscafilecapathr r r rX 0 s rX c s^ e Z d Z d Z f Z f d d Z e f d d Z e f d d Z S) _ASN1Objectz#ASN.1 object identifier lookup
c s t j | t | d d S)Nr) F)super__new___txt2obj)clsoid) __class__r r rc C s z_ASN1Object.__new__c s t j | t | S)z3Create _ASN1Object from OpenSSL numeric ID
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z1.3.6.1.5.5.7.3.1z1.3.6.1.5.5.7.3.2N)r9 r: r; rk SERVER_AUTH CLIENT_AUTHr r r r rn S s rn c @ s e Z d Z d Z d Z d Z e d d Z e d d Z d
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zSSLContext.wrap_socketc C s t } xp | D]h } t | d } t | d k sI t | d k rX t d n | j t | | j | q W| j | d S)Nasciir z(NPN protocols must be 1 to 255 in length) bytearraybytesrO r rC extendZ_set_npn_protocols)r{
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rq r_ r` r c C sB t | t s t | n t t } | j t O_ | j t O_ | j t t d d O_ | t
j k r t | _
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j k r | j t t d d O_ | j t t d d O_ | j t t d d O_ | j t n | s | s | r | j | | | n | j
t k r>| j | n | S)zCreate a SSLContext object with default settings.
NOTE: The protocol and settings may change anytime without prior
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ZOP_NO_COMPRESSIONr TZOP_CIPHER_SERVER_PREFERENCEZOP_SINGLE_DH_USEZOP_SINGLE_ECDH_USE)r ra r rq r' options OP_NO_SSLv2 OP_NO_SSLv3r r rn ro r verify_modecheck_hostnamerp rw _RESTRICTED_SERVER_CIPHERSr r r )r r_ r` r contextr r r create_default_context s& r cert_reqsr Fr certfilekeyfilec
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| | n | s | s | r | j | | | n | j t k r | j
| n | S)a/ Create a SSLContext object for Python stdlib modules
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Nzcertfile must be specified)r ra r rq r r r r r rM load_cert_chainr r r )
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d d Z d d d d Z d d Z d d d Z d d Z d d Z d d Z d d d Z d d d Z d! d" Z d d# d$ Z d% d d& d' Z d d d( d) Z d% d d* d+ Z d d d, d- Z d. d/ Z d0 d1 Z d2 d3 Z d4 d5 Z d6 d7 Z! d8 d9 Z" d d: d; Z# d< d= Z$ d> d? Z% d@ dA Z& dB dC Z' dD dE dF Z( d S)Gr zThis class implements a subtype of socket.socket that wraps
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r<| j* Yq@Xn d S)Nz5certfile must be specified for server-side operationszcertfile must be specifiedz!only stream sockets are supportedz4server_hostname can only be specified in client modez'check_hostname requires server_hostnamefamilytypeprotofilenoFTg zHdo_handshake_on_connect should not be specified for non-blocking sockets)+r rM rq r r r r rw r r r ssl_versionca_certsciphersZ
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zSSLSocket.__init__c C s | j S)N)r )r{ r r r r R s zSSLSocket.contextc C s | | _ | | j _ d S)N)r r r )r{ Zctxr r r r V s c C s t d | j j d S)NzCan't dup() %s instances)NotImplementedrg r9 )r{ r r r dup[ s z
SSLSocket.dupc C s d S)Nr )r{ msgr r r _checkClosed_ s zSSLSocket._checkClosedc C s | j s | j n d S)N)r r )r{ r r r _check_connectedc s zSSLSocket._check_connectedc C s | j | j s" t d n yD | d k rI | j j | | } n | j j | p[ d } | SWn[ t k
r } z; | j d t k r | j r | d k r d Sd Sn WYd d } ~ Xn Xd S)zORead up to LEN bytes and return them.
Return zero-length string on EOF.z'Read on closed or unwrapped SSL socket.Ni r )r r rM readr ry Z
SSL_ERROR_EOFr )r{ rO buffervxr r r r k s
zSSLSocket.readc C s2 | j | j s" t d n | j j | S)zhWrite DATA to the underlying SSL channel. Returns
number of bytes of DATA actually transmitted.z(Write on closed or unwrapped SSL socket.)r r rM write)r{ datar r r r s
zSSLSocket.writec C s$ | j | j | j j | S)zReturns a formatted version of the data in the
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certificate was provided, but not validated.)r r r Zpeer_certificate)r{ Z binary_formr r r getpeercert s
zSSLSocket.getpeercertc C s3 | j | j s t j r" d S| j j Sd S)N)r r r r% selected_npn_protocol)r{ r r r r s
z SSLSocket.selected_npn_protocolc C s( | j | j s d S| j j Sd S)N)r r cipher)r{ r r r r s
zSSLSocket.cipherc C s( | j | j s d S| j j Sd S)N)r r compression)r{ r r r r s
zSSLSocket.compressionc C s | j | j r | d k r5 t d | j n y | j j | } WnV t k
r } z6 | j d t k rw d S| j d t k r d S WYd d } ~ Xq X| Sn t j
| | | Sd S)Nr z3non-zero flags not allowed in calls to send() on %s) r r rM rg r r ry ZSSL_ERROR_WANT_READZSSL_ERROR_WANT_WRITEr2 send)r{ r flagsr r r r r r s
zSSLSocket.sendc C sb | j | j r) t d | j n5 | d k rH t j | | | St j | | | | Sd S)Nz%sendto not allowed on instances of %s)r r rM rg r2 sendto)r{ r Z
flags_or_addraddrr r r r s
zSSLSocket.sendtoc O s t d | j d S)Nz&sendmsg not allowed on instances of %s)r rg )r{ ry rz r r r sendmsg s zSSLSocket.sendmsgc C s | j | j r | d k r5 t d | j n t | } d } x3 | | k r| | j | | d } | | 7} qJ W| St j | | | Sd S)Nr z6non-zero flags not allowed in calls to sendall() on %s)r r rM rg rO r r2 sendall)r{ r r Zamountr@ r r r r r s
zSSLSocket.sendalli c C sY | j | j rB | d k r5 t d | j n | j | St j | | | Sd S)Nr z3non-zero flags not allowed in calls to recv() on %s)r r rM rg r r2 recv)r{ buflenr r r r r s
zSSLSocket.recvc C s | j | r+ | d k r+ t | } n | d k r@ d } n | j r{ | d k rk t d | j n | j | | St j | | | | Sd S)Ni r z8non-zero flags not allowed in calls to recv_into() on %s)r rO r rM rg r r2 recv_into)r{ r nbytesr r r r r s
zSSLSocket.recv_intoc C s@ | j | j r) t d | j n t j | | | Sd S)Nz'recvfrom not allowed on instances of %s)r r rM rg r2 recvfrom)r{ r r r r r r s
zSSLSocket.recvfromc C sC | j | j r) t d | j n t j | | | | Sd S)Nz,recvfrom_into not allowed on instances of %s)r r rM rg r2
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 rg )r{ ry rz r r r recvmsg s zSSLSocket.recvmsgc O s t d | j d S)Nz+recvmsg_into not allowed on instances of %s)r rg )r{ ry rz r r r recvmsg_into s zSSLSocket.recvmsg_intoc C s( | j | j r | j j Sd Sd S)Nr )r r pending)r{ r r r r s
zSSLSocket.pendingc C s' | j d | _ t j | | d S)N)r r r2 shutdown)r{ Zhowr r r r s
zSSLSocket.shutdownc C s? | j r% | j j } d | _ | St d t | d S)NzNo SSL wrapper around )r r rM str)r{ sr r r unwrap s
zSSLSocket.unwrapc C s d | _ t j | d S)N)r r2 _real_close)r{ r r r r $ s zSSLSocket._real_closec 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)z Perform a TLS/SSL handshake.g Nz-check_hostname needs server_hostname argument) r r r r r r r r rM rT r )r{ blockr r r r r ( s
zSSLSocket.do_handshakec C s | j r t d n | j r0 t d n | j j | d | j | _ ya | rl t j | | } n d } t j | | | s d | _ | j
r | j q n | SWn$ t t f k
r d | _ Yn Xd S)Nz!can't connect in server-side modez/attempt to connect already-connected SSLSocket!FT)
r~ rM r r r r r r2
connect_exconnectr r r )r{ r r rcr r r
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an SSL channel.FN)r )r{ r r r r r P s zSSLSocket.connectc C s | j | d S)zQConnects to remote ADDR, and then wraps the connection in
an SSL channel.T)r )r{ r r r r r U s zSSLSocket.connect_exc C sI t j | \ } } | j j | d | j d | j d d } | | f S)zAccepts a new connection from a remote client, and returns
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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)zGet 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).
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tls-uniquez({0} channel binding type not implementedN)CHANNEL_BINDING_TYPESrM r formatr Z
tls_unique_cb)r{ Zcb_typer r r get_channel_bindingf s z SSLSocket.get_channel_binding))r9 r: r; rk r r' r3 r4 r| propertyr setterr 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 sP S
r Tc
C sC t d | d | d | d | d | d | d | d | d | d
|
S) Nr} r r r~ r r r r r r )r )
r} r r r~ r r r r r r r r r r v s r c C s% d d l } | j | j | d S)zTakes a date-time string in standard ASN1_print form
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r r rM stripendswithr rO r Z decodebytesencode)Zpem_cert_stringdr r r PEM_cert_to_DER_cert s
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C s | \ } } | d k r! t } n t } t | d | d | } t | . } | j | } | j d } Wd QXWd QXt | S)zRetrieve 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.
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