--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/ssl.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,451 @@
+# Wrapper module for _ssl, providing some additional facilities
+# implemented in Python. Written by Bill Janssen.
+
+"""\
+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
+"""
+
+import textwrap
+
+import _ssl # if we can't import it, let the error propagate
+
+from _ssl import SSLError
+from _ssl import CERT_NONE, CERT_OPTIONAL, CERT_REQUIRED
+from _ssl import PROTOCOL_SSLv2, PROTOCOL_SSLv3, PROTOCOL_SSLv23, PROTOCOL_TLSv1
+from _ssl import RAND_status, RAND_egd, RAND_add
+from _ssl import \
+ 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
+
+from socket import socket, _fileobject
+from socket import getnameinfo as _getnameinfo
+import base64 # for DER-to-PEM translation
+
+class SSLSocket (socket):
+
+ """This class implements a subtype of socket.socket that wraps
+ the underlying OS socket in an SSL context when necessary, and
+ provides read and write methods over that channel."""
+
+ def __init__(self, sock, keyfile=None, certfile=None,
+ server_side=False, cert_reqs=CERT_NONE,
+ ssl_version=PROTOCOL_SSLv23, ca_certs=None,
+ do_handshake_on_connect=True,
+ suppress_ragged_eofs=True):
+ socket.__init__(self, _sock=sock._sock)
+ # the initializer for socket trashes the methods (tsk, tsk), so...
+ self.send = lambda data, flags=0: SSLSocket.send(self, data, flags)
+ self.sendto = lambda data, addr, flags=0: SSLSocket.sendto(self, data, addr, flags)
+ self.recv = lambda buflen=1024, flags=0: SSLSocket.recv(self, buflen, flags)
+ self.recvfrom = lambda addr, buflen=1024, flags=0: SSLSocket.recvfrom(self, addr, buflen, flags)
+ self.recv_into = lambda buffer, nbytes=None, flags=0: SSLSocket.recv_into(self, buffer, nbytes, flags)
+ self.recvfrom_into = lambda buffer, nbytes=None, flags=0: SSLSocket.recvfrom_into(self, buffer, nbytes, flags)
+
+ if certfile and not keyfile:
+ keyfile = certfile
+ # see if it's connected
+ try:
+ socket.getpeername(self)
+ except:
+ # no, no connection yet
+ self._sslobj = None
+ else:
+ # yes, create the SSL object
+ self._sslobj = _ssl.sslwrap(self._sock, server_side,
+ keyfile, certfile,
+ cert_reqs, ssl_version, ca_certs)
+ if do_handshake_on_connect:
+ timeout = self.gettimeout()
+ try:
+ self.settimeout(None)
+ self.do_handshake()
+ finally:
+ self.settimeout(timeout)
+ self.keyfile = keyfile
+ self.certfile = certfile
+ self.cert_reqs = cert_reqs
+ self.ssl_version = ssl_version
+ self.ca_certs = ca_certs
+ self.do_handshake_on_connect = do_handshake_on_connect
+ self.suppress_ragged_eofs = suppress_ragged_eofs
+ self._makefile_refs = 0
+
+ def read(self, len=1024):
+
+ """Read up to LEN bytes and return them.
+ Return zero-length string on EOF."""
+
+ try:
+ return self._sslobj.read(len)
+ except SSLError, x:
+ if x.args[0] == SSL_ERROR_EOF and self.suppress_ragged_eofs:
+ return ''
+ else:
+ raise
+
+ def write(self, data):
+
+ """Write DATA to the underlying SSL channel. Returns
+ number of bytes of DATA actually transmitted."""
+
+ return self._sslobj.write(data)
+
+ def getpeercert(self, binary_form=False):
+
+ """Returns a formatted version of the data in the
+ certificate provided by the other end of the SSL channel.
+ Return None if no certificate was provided, {} if a
+ certificate was provided, but not validated."""
+
+ return self._sslobj.peer_certificate(binary_form)
+
+ def cipher (self):
+
+ if not self._sslobj:
+ return None
+ else:
+ return self._sslobj.cipher()
+
+ def send (self, data, flags=0):
+ if self._sslobj:
+ if flags != 0:
+ raise ValueError(
+ "non-zero flags not allowed in calls to send() on %s" %
+ self.__class__)
+ while True:
+ try:
+ v = self._sslobj.write(data)
+ except SSLError, x:
+ if x.args[0] == SSL_ERROR_WANT_READ:
+ return 0
+ elif x.args[0] == SSL_ERROR_WANT_WRITE:
+ return 0
+ else:
+ raise
+ else:
+ return v
+ else:
+ return socket.send(self, data, flags)
+
+ def sendto (self, data, addr, flags=0):
+ if self._sslobj:
+ raise ValueError("sendto not allowed on instances of %s" %
+ self.__class__)
+ else:
+ return socket.sendto(self, data, addr, flags)
+
+ def sendall (self, data, flags=0):
+ if self._sslobj:
+ if flags != 0:
+ raise ValueError(
+ "non-zero flags not allowed in calls to sendall() on %s" %
+ self.__class__)
+ amount = len(data)
+ count = 0
+ while (count < amount):
+ v = self.send(data[count:])
+ count += v
+ return amount
+ else:
+ return socket.sendall(self, data, flags)
+
+ def recv (self, buflen=1024, flags=0):
+ if self._sslobj:
+ if flags != 0:
+ raise ValueError(
+ "non-zero flags not allowed in calls to sendall() on %s" %
+ self.__class__)
+ while True:
+ try:
+ return self.read(buflen)
+ except SSLError, x:
+ if x.args[0] == SSL_ERROR_WANT_READ:
+ continue
+ else:
+ raise x
+ else:
+ return socket.recv(self, buflen, flags)
+
+ def recv_into (self, buffer, nbytes=None, flags=0):
+ if buffer and (nbytes is None):
+ nbytes = len(buffer)
+ elif nbytes is None:
+ nbytes = 1024
+ if self._sslobj:
+ if flags != 0:
+ raise ValueError(
+ "non-zero flags not allowed in calls to recv_into() on %s" %
+ self.__class__)
+ while True:
+ try:
+ tmp_buffer = self.read(nbytes)
+ v = len(tmp_buffer)
+ buffer[:v] = tmp_buffer
+ return v
+ except SSLError as x:
+ if x.args[0] == SSL_ERROR_WANT_READ:
+ continue
+ else:
+ raise x
+ else:
+ return socket.recv_into(self, buffer, nbytes, flags)
+
+ def recvfrom (self, addr, buflen=1024, flags=0):
+ if self._sslobj:
+ raise ValueError("recvfrom not allowed on instances of %s" %
+ self.__class__)
+ else:
+ return socket.recvfrom(self, addr, buflen, flags)
+
+ def recvfrom_into (self, buffer, nbytes=None, flags=0):
+ if self._sslobj:
+ raise ValueError("recvfrom_into not allowed on instances of %s" %
+ self.__class__)
+ else:
+ return socket.recvfrom_into(self, buffer, nbytes, flags)
+
+ def pending (self):
+ if self._sslobj:
+ return self._sslobj.pending()
+ else:
+ return 0
+
+ def unwrap (self):
+ if self._sslobj:
+ s = self._sslobj.shutdown()
+ self._sslobj = None
+ return s
+ else:
+ raise ValueError("No SSL wrapper around " + str(self))
+
+ def shutdown (self, how):
+ self._sslobj = None
+ socket.shutdown(self, how)
+
+ def close (self):
+ if self._makefile_refs < 1:
+ self._sslobj = None
+ socket.close(self)
+ else:
+ self._makefile_refs -= 1
+
+ def do_handshake (self):
+
+ """Perform a TLS/SSL handshake."""
+
+ self._sslobj.do_handshake()
+
+ def connect(self, addr):
+
+ """Connects to remote ADDR, and then wraps the connection in
+ an SSL channel."""
+
+ # Here we assume that the socket is client-side, and not
+ # connected at the time of the call. We connect it, then wrap it.
+ if self._sslobj:
+ raise ValueError("attempt to connect already-connected SSLSocket!")
+ socket.connect(self, addr)
+ self._sslobj = _ssl.sslwrap(self._sock, False, self.keyfile, self.certfile,
+ self.cert_reqs, self.ssl_version,
+ self.ca_certs)
+ if self.do_handshake_on_connect:
+ self.do_handshake()
+
+ def accept(self):
+
+ """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."""
+
+ newsock, addr = socket.accept(self)
+ return (SSLSocket(newsock,
+ keyfile=self.keyfile,
+ certfile=self.certfile,
+ server_side=True,
+ cert_reqs=self.cert_reqs,
+ ssl_version=self.ssl_version,
+ ca_certs=self.ca_certs,
+ do_handshake_on_connect=self.do_handshake_on_connect,
+ suppress_ragged_eofs=self.suppress_ragged_eofs),
+ addr)
+
+ def makefile(self, mode='r', bufsize=-1):
+
+ """Make and return a file-like object that
+ works with the SSL connection. Just use the code
+ from the socket module."""
+
+ self._makefile_refs += 1
+ return _fileobject(self, mode, bufsize)
+
+
+
+def wrap_socket(sock, keyfile=None, certfile=None,
+ server_side=False, cert_reqs=CERT_NONE,
+ ssl_version=PROTOCOL_SSLv23, ca_certs=None,
+ do_handshake_on_connect=True,
+ suppress_ragged_eofs=True):
+
+ return SSLSocket(sock, keyfile=keyfile, certfile=certfile,
+ server_side=server_side, cert_reqs=cert_reqs,
+ ssl_version=ssl_version, ca_certs=ca_certs,
+ do_handshake_on_connect=do_handshake_on_connect,
+ suppress_ragged_eofs=suppress_ragged_eofs)
+
+
+# some utility functions
+
+def cert_time_to_seconds(cert_time):
+
+ """Takes a date-time string in standard ASN1_print form
+ ("MON DAY 24HOUR:MINUTE:SEC YEAR TIMEZONE") and return
+ a Python time value in seconds past the epoch."""
+
+ import time
+ return time.mktime(time.strptime(cert_time, "%b %d %H:%M:%S %Y GMT"))
+
+PEM_HEADER = "-----BEGIN CERTIFICATE-----"
+PEM_FOOTER = "-----END CERTIFICATE-----"
+
+def DER_cert_to_PEM_cert(der_cert_bytes):
+
+ """Takes a certificate in binary DER format and returns the
+ PEM version of it as a string."""
+
+ if hasattr(base64, 'standard_b64encode'):
+ # preferred because older API gets line-length wrong
+ f = base64.standard_b64encode(der_cert_bytes)
+ return (PEM_HEADER + '\n' +
+ textwrap.fill(f, 64) +
+ PEM_FOOTER + '\n')
+ else:
+ return (PEM_HEADER + '\n' +
+ base64.encodestring(der_cert_bytes) +
+ PEM_FOOTER + '\n')
+
+def PEM_cert_to_DER_cert(pem_cert_string):
+
+ """Takes a certificate in ASCII PEM format and returns the
+ DER-encoded version of it as a byte sequence"""
+
+ if not pem_cert_string.startswith(PEM_HEADER):
+ raise ValueError("Invalid PEM encoding; must start with %s"
+ % PEM_HEADER)
+ if not pem_cert_string.strip().endswith(PEM_FOOTER):
+ raise ValueError("Invalid PEM encoding; must end with %s"
+ % PEM_FOOTER)
+ d = pem_cert_string.strip()[len(PEM_HEADER):-len(PEM_FOOTER)]
+ return base64.decodestring(d)
+
+def get_server_certificate (addr, ssl_version=PROTOCOL_SSLv3, ca_certs=None):
+
+ """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."""
+
+ host, port = addr
+ if (ca_certs is not None):
+ cert_reqs = CERT_REQUIRED
+ else:
+ cert_reqs = CERT_NONE
+ s = wrap_socket(socket(), ssl_version=ssl_version,
+ cert_reqs=cert_reqs, ca_certs=ca_certs)
+ s.connect(addr)
+ dercert = s.getpeercert(True)
+ s.close()
+ return DER_cert_to_PEM_cert(dercert)
+
+def get_protocol_name (protocol_code):
+ if protocol_code == PROTOCOL_TLSv1:
+ return "TLSv1"
+ elif protocol_code == PROTOCOL_SSLv23:
+ return "SSLv23"
+ elif protocol_code == PROTOCOL_SSLv2:
+ return "SSLv2"
+ elif protocol_code == PROTOCOL_SSLv3:
+ return "SSLv3"
+ else:
+ return "<unknown>"
+
+
+# a replacement for the old socket.ssl function
+
+def sslwrap_simple (sock, keyfile=None, certfile=None):
+
+ """A replacement for the old socket.ssl function. Designed
+ for compability with Python 2.5 and earlier. Will disappear in
+ Python 3.0."""
+
+ if hasattr(sock, "_sock"):
+ sock = sock._sock
+
+ ssl_sock = _ssl.sslwrap(sock, 0, keyfile, certfile, CERT_NONE,
+ PROTOCOL_SSLv23, None)
+ try:
+ sock.getpeername()
+ except:
+ # no, no connection yet
+ pass
+ else:
+ # yes, do the handshake
+ ssl_sock.do_handshake()
+
+ return ssl_sock