Remove windows python distribution from repo and add requirements.txt

1 files changed, 0 insertions, 346 deletions

diff --git a/python/urllib3/contrib/_securetransport/low_level.py b/python/urllib3/contrib/_securetransport/low_level.py
deleted file mode 100644
index b13cd9e..0000000
--- a/python/urllib3/contrib/_securetransport/low_level.py
+++ /dev/null
@@ -1,346 +0,0 @@
-"""
-Low-level helpers for the SecureTransport bindings.
-
-These are Python functions that are not directly related to the high-level APIs
-but are necessary to get them to work. They include a whole bunch of low-level
-CoreFoundation messing about and memory management. The concerns in this module
-are almost entirely about trying to avoid memory leaks and providing
-appropriate and useful assistance to the higher-level code.
-"""
-import base64
-import ctypes
-import itertools
-import re
-import os
-import ssl
-import tempfile
-
-from .bindings import Security, CoreFoundation, CFConst
-
-
-# This regular expression is used to grab PEM data out of a PEM bundle.
-_PEM_CERTS_RE = re.compile(
-    b"-----BEGIN CERTIFICATE-----\n(.*?)\n-----END CERTIFICATE-----", re.DOTALL
-)
-
-
-def _cf_data_from_bytes(bytestring):
-    """
-    Given a bytestring, create a CFData object from it. This CFData object must
-    be CFReleased by the caller.
-    """
-    return CoreFoundation.CFDataCreate(
-        CoreFoundation.kCFAllocatorDefault, bytestring, len(bytestring)
-    )
-
-
-def _cf_dictionary_from_tuples(tuples):
-    """
-    Given a list of Python tuples, create an associated CFDictionary.
-    """
-    dictionary_size = len(tuples)
-
-    # We need to get the dictionary keys and values out in the same order.
-    keys = (t[0] for t in tuples)
-    values = (t[1] for t in tuples)
-    cf_keys = (CoreFoundation.CFTypeRef * dictionary_size)(*keys)
-    cf_values = (CoreFoundation.CFTypeRef * dictionary_size)(*values)
-
-    return CoreFoundation.CFDictionaryCreate(
-        CoreFoundation.kCFAllocatorDefault,
-        cf_keys,
-        cf_values,
-        dictionary_size,
-        CoreFoundation.kCFTypeDictionaryKeyCallBacks,
-        CoreFoundation.kCFTypeDictionaryValueCallBacks,
-    )
-
-
-def _cf_string_to_unicode(value):
-    """
-    Creates a Unicode string from a CFString object. Used entirely for error
-    reporting.
-
-    Yes, it annoys me quite a lot that this function is this complex.
-    """
-    value_as_void_p = ctypes.cast(value, ctypes.POINTER(ctypes.c_void_p))
-
-    string = CoreFoundation.CFStringGetCStringPtr(
-        value_as_void_p,
-        CFConst.kCFStringEncodingUTF8
-    )
-    if string is None:
-        buffer = ctypes.create_string_buffer(1024)
-        result = CoreFoundation.CFStringGetCString(
-            value_as_void_p,
-            buffer,
-            1024,
-            CFConst.kCFStringEncodingUTF8
-        )
-        if not result:
-            raise OSError('Error copying C string from CFStringRef')
-        string = buffer.value
-    if string is not None:
-        string = string.decode('utf-8')
-    return string
-
-
-def _assert_no_error(error, exception_class=None):
-    """
-    Checks the return code and throws an exception if there is an error to
-    report
-    """
-    if error == 0:
-        return
-
-    cf_error_string = Security.SecCopyErrorMessageString(error, None)
-    output = _cf_string_to_unicode(cf_error_string)
-    CoreFoundation.CFRelease(cf_error_string)
-
-    if output is None or output == u'':
-        output = u'OSStatus %s' % error
-
-    if exception_class is None:
-        exception_class = ssl.SSLError
-
-    raise exception_class(output)
-
-
-def _cert_array_from_pem(pem_bundle):
-    """
-    Given a bundle of certs in PEM format, turns them into a CFArray of certs
-    that can be used to validate a cert chain.
-    """
-    # Normalize the PEM bundle's line endings.
-    pem_bundle = pem_bundle.replace(b"\r\n", b"\n")
-
-    der_certs = [
-        base64.b64decode(match.group(1))
-        for match in _PEM_CERTS_RE.finditer(pem_bundle)
-    ]
-    if not der_certs:
-        raise ssl.SSLError("No root certificates specified")
-
-    cert_array = CoreFoundation.CFArrayCreateMutable(
-        CoreFoundation.kCFAllocatorDefault,
-        0,
-        ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks)
-    )
-    if not cert_array:
-        raise ssl.SSLError("Unable to allocate memory!")
-
-    try:
-        for der_bytes in der_certs:
-            certdata = _cf_data_from_bytes(der_bytes)
-            if not certdata:
-                raise ssl.SSLError("Unable to allocate memory!")
-            cert = Security.SecCertificateCreateWithData(
-                CoreFoundation.kCFAllocatorDefault, certdata
-            )
-            CoreFoundation.CFRelease(certdata)
-            if not cert:
-                raise ssl.SSLError("Unable to build cert object!")
-
-            CoreFoundation.CFArrayAppendValue(cert_array, cert)
-            CoreFoundation.CFRelease(cert)
-    except Exception:
-        # We need to free the array before the exception bubbles further.
-        # We only want to do that if an error occurs: otherwise, the caller
-        # should free.
-        CoreFoundation.CFRelease(cert_array)
-
-    return cert_array
-
-
-def _is_cert(item):
-    """
-    Returns True if a given CFTypeRef is a certificate.
-    """
-    expected = Security.SecCertificateGetTypeID()
-    return CoreFoundation.CFGetTypeID(item) == expected
-
-
-def _is_identity(item):
-    """
-    Returns True if a given CFTypeRef is an identity.
-    """
-    expected = Security.SecIdentityGetTypeID()
-    return CoreFoundation.CFGetTypeID(item) == expected
-
-
-def _temporary_keychain():
-    """
-    This function creates a temporary Mac keychain that we can use to work with
-    credentials. This keychain uses a one-time password and a temporary file to
-    store the data. We expect to have one keychain per socket. The returned
-    SecKeychainRef must be freed by the caller, including calling
-    SecKeychainDelete.
-
-    Returns a tuple of the SecKeychainRef and the path to the temporary
-    directory that contains it.
-    """
-    # Unfortunately, SecKeychainCreate requires a path to a keychain. This
-    # means we cannot use mkstemp to use a generic temporary file. Instead,
-    # we're going to create a temporary directory and a filename to use there.
-    # This filename will be 8 random bytes expanded into base64. We also need
-    # some random bytes to password-protect the keychain we're creating, so we
-    # ask for 40 random bytes.
-    random_bytes = os.urandom(40)
-    filename = base64.b16encode(random_bytes[:8]).decode('utf-8')
-    password = base64.b16encode(random_bytes[8:])  # Must be valid UTF-8
-    tempdirectory = tempfile.mkdtemp()
-
-    keychain_path = os.path.join(tempdirectory, filename).encode('utf-8')
-
-    # We now want to create the keychain itself.
-    keychain = Security.SecKeychainRef()
-    status = Security.SecKeychainCreate(
-        keychain_path,
-        len(password),
-        password,
-        False,
-        None,
-        ctypes.byref(keychain)
-    )
-    _assert_no_error(status)
-
-    # Having created the keychain, we want to pass it off to the caller.
-    return keychain, tempdirectory
-
-
-def _load_items_from_file(keychain, path):
-    """
-    Given a single file, loads all the trust objects from it into arrays and
-    the keychain.
-    Returns a tuple of lists: the first list is a list of identities, the
-    second a list of certs.
-    """
-    certificates = []
-    identities = []
-    result_array = None
-
-    with open(path, 'rb') as f:
-        raw_filedata = f.read()
-
-    try:
-        filedata = CoreFoundation.CFDataCreate(
-            CoreFoundation.kCFAllocatorDefault,
-            raw_filedata,
-            len(raw_filedata)
-        )
-        result_array = CoreFoundation.CFArrayRef()
-        result = Security.SecItemImport(
-            filedata,  # cert data
-            None,  # Filename, leaving it out for now
-            None,  # What the type of the file is, we don't care
-            None,  # what's in the file, we don't care
-            0,  # import flags
-            None,  # key params, can include passphrase in the future
-            keychain,  # The keychain to insert into
-            ctypes.byref(result_array)  # Results
-        )
-        _assert_no_error(result)
-
-        # A CFArray is not very useful to us as an intermediary
-        # representation, so we are going to extract the objects we want
-        # and then free the array. We don't need to keep hold of keys: the
-        # keychain already has them!
-        result_count = CoreFoundation.CFArrayGetCount(result_array)
-        for index in range(result_count):
-            item = CoreFoundation.CFArrayGetValueAtIndex(
-                result_array, index
-            )
-            item = ctypes.cast(item, CoreFoundation.CFTypeRef)
-
-            if _is_cert(item):
-                CoreFoundation.CFRetain(item)
-                certificates.append(item)
-            elif _is_identity(item):
-                CoreFoundation.CFRetain(item)
-                identities.append(item)
-    finally:
-        if result_array:
-            CoreFoundation.CFRelease(result_array)
-
-        CoreFoundation.CFRelease(filedata)
-
-    return (identities, certificates)
-
-
-def _load_client_cert_chain(keychain, *paths):
-    """
-    Load certificates and maybe keys from a number of files. Has the end goal
-    of returning a CFArray containing one SecIdentityRef, and then zero or more
-    SecCertificateRef objects, suitable for use as a client certificate trust
-    chain.
-    """
-    # Ok, the strategy.
-    #
-    # This relies on knowing that macOS will not give you a SecIdentityRef
-    # unless you have imported a key into a keychain. This is a somewhat
-    # artificial limitation of macOS (for example, it doesn't necessarily
-    # affect iOS), but there is nothing inside Security.framework that lets you
-    # get a SecIdentityRef without having a key in a keychain.
-    #
-    # So the policy here is we take all the files and iterate them in order.
-    # Each one will use SecItemImport to have one or more objects loaded from
-    # it. We will also point at a keychain that macOS can use to work with the
-    # private key.
-    #
-    # Once we have all the objects, we'll check what we actually have. If we
-    # already have a SecIdentityRef in hand, fab: we'll use that. Otherwise,
-    # we'll take the first certificate (which we assume to be our leaf) and
-    # ask the keychain to give us a SecIdentityRef with that cert's associated
-    # key.
-    #
-    # We'll then return a CFArray containing the trust chain: one
-    # SecIdentityRef and then zero-or-more SecCertificateRef objects. The
-    # responsibility for freeing this CFArray will be with the caller. This
-    # CFArray must remain alive for the entire connection, so in practice it
-    # will be stored with a single SSLSocket, along with the reference to the
-    # keychain.
-    certificates = []
-    identities = []
-
-    # Filter out bad paths.
-    paths = (path for path in paths if path)
-
-    try:
-        for file_path in paths:
-            new_identities, new_certs = _load_items_from_file(
-                keychain, file_path
-            )
-            identities.extend(new_identities)
-            certificates.extend(new_certs)
-
-        # Ok, we have everything. The question is: do we have an identity? If
-        # not, we want to grab one from the first cert we have.
-        if not identities:
-            new_identity = Security.SecIdentityRef()
-            status = Security.SecIdentityCreateWithCertificate(
-                keychain,
-                certificates[0],
-                ctypes.byref(new_identity)
-            )
-            _assert_no_error(status)
-            identities.append(new_identity)
-
-            # We now want to release the original certificate, as we no longer
-            # need it.
-            CoreFoundation.CFRelease(certificates.pop(0))
-
-        # We now need to build a new CFArray that holds the trust chain.
-        trust_chain = CoreFoundation.CFArrayCreateMutable(
-            CoreFoundation.kCFAllocatorDefault,
-            0,
-            ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks),
-        )
-        for item in itertools.chain(identities, certificates):
-            # ArrayAppendValue does a CFRetain on the item. That's fine,
-            # because the finally block will release our other refs to them.
-            CoreFoundation.CFArrayAppendValue(trust_chain, item)
-
-        return trust_chain
-    finally:
-        for obj in itertools.chain(identities, certificates):
-            CoreFoundation.CFRelease(obj)