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f69613965f
This simplifies logics for the user, especially if he uses both fingerprint and certificate validation: it is hard to maintain the compatibility with the prior behaviour and to avoid getting default CA bundle to be disabled when fingerprint verification is requested. See http://thread.gmane.org/gmane.mail.imap.offlineimap.general/6695 for discussion about this change. Default CA bundle is requested via 'sslcertfile = OS-DEFAULT'. I had also enforced all cases where explicitely-requested CA bundles are non-existent to be hard errors: when users asks us to use CA bundle (and, thus, certificate validation), but we can't find one, we must error out rather than happily continue and downgrade to no validation. Reported-By: Edd Barrett <edd@theunixzoo.co.uk> Reviewed-By: Nicolas Sebrecht <nicolas.s-dev@laposte.net> Signed-off-by: Eygene Ryabinkin <rea@codelabs.ru>
92 lines
2.5 KiB
Python
92 lines
2.5 KiB
Python
# Copyright 2014 Eygene A. Ryabinkin.
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#
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# Module that supports distribution-specific functions.
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import platform
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import os
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# Each dictionary value is either string or some iterable.
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#
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# For the former we will just return the value, for an iterable
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# we will walk through the values and will return the first
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# one that corresponds to the existing file.
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__DEF_OS_LOCATIONS = {
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'freebsd': '/usr/local/share/certs/ca-root-nss.crt',
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'openbsd': '/etc/ssl/cert.pem',
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'dragonfly': '/etc/ssl/cert.pem',
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'darwin': [
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# MacPorts, port curl-ca-bundle
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'/opt/local/share/curl/curl-ca-bundle.crt',
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],
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'linux-ubuntu': '/etc/ssl/certs/ca-certificates.crt',
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'linux-debian': '/etc/ssl/certs/ca-certificates.crt',
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'linux-fedora': '/etc/pki/tls/certs/ca-bundle.crt',
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'linux-redhat': '/etc/pki/tls/certs/ca-bundle.crt',
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'linux-suse': '/etc/ssl/ca-bundle.pem',
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}
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def get_os_name():
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"""
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Finds out OS name. For non-Linux system it will be just a plain
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OS name (like FreeBSD), for Linux it will be "linux-<distro>",
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where <distro> is the name of the distribution, as returned by
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the first component of platform.linux_distribution.
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Return value will be all-lowercase to avoid confusion about
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proper name capitalisation.
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"""
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OS = platform.system().lower()
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if OS.startswith('linux'):
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DISTRO = platform.linux_distribution()[0]
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if DISTRO:
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OS = OS + "-%s" % DISTRO.lower()
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return OS
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def get_os_sslcertfile_searchpath():
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"""Returns search path for CA bundle for the current OS.
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We will return an iterable even if configuration has just
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a single value: it is easier for our callers to be sure
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that they can iterate over result.
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Returned value of None means that there is no search path
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at all.
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"""
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OS = get_os_name()
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l = None
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if OS in __DEF_OS_LOCATIONS:
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l = __DEF_OS_LOCATIONS[OS]
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if not hasattr(l, '__iter__'):
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l = (l, )
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return l
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def get_os_sslcertfile():
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"""
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Finds out the location for the distribution-specific
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CA certificate file bundle.
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Returns the location of the file or None if there is
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no known CA certificate file or all known locations
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correspond to non-existing filesystem objects.
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"""
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l = get_os_sslcertfile_searchpath()
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if l == None:
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return None
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for f in l:
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assert (type(f) == type(""))
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if os.path.exists(f) and \
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(os.path.isfile(f) or os.path.islink(f)):
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return f
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return None
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