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mod_nss: use more robust quoting of NSSNickname directive

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The code which handles configuration of mod_nss module must be more robust
when handling NSS nicknames generated from subject names containing quoted RDN
values.

https://fedorahosted.org/freeipa/ticket/5809

Reviewed-By: Tomas Krizek <tkrizek@redhat.com>
This commit is contained in:
Martin Babinsky
2016-09-23 15:56:46 +02:00
parent 4d994bee60
commit ee96384c3e
2 changed files with 33 additions and 12 deletions
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42
ipaserver/install/installutils.py
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@@ -376,13 +376,35 @@ def update_file(filename, orig, subst):
print("File %s doesn't exist." % filename)
return 1
def set_directive(filename, directive, value, quotes=True, separator=' '):
def set_directive(filename, directive, value, quotes=True, separator=' ',
quote_char='\"'):
"""Set a name/value pair directive in a configuration file.
A value of None means to drop the directive.
A value of None means to drop the directive.
This has only been tested with nss.conf
This has only been tested with nss.conf
:param directive: directive name
:param value: value of the directive
:param quotes: whether to quote `value` in `quote_char`. If true, then
the `quote_char` are first escaped to avoid unparseable directives
:param quote_char: the character used for quoting `value`
"""
def format_directive(directive, value, separator, quotes, quote_char):
directive_sep = "{directive}{separator}".format(directive=directive,
separator=separator)
transformed_value = value
if quotes:
transformed_value = "{quote}{value}{quote}".format(
quote=quote_char,
value="".join(ipautil.escape_seq(quote_char, value))
)
return "{directive_sep}{value}\n".format(
directive_sep=directive_sep, value=transformed_value)
valueset = False
st = os.stat(filename)
fd = open(filename)
@@ -391,19 +413,17 @@ def set_directive(filename, directive, value, quotes=True, separator=' '):
if line.lstrip().startswith(directive):
valueset = True
if value is not None:
if quotes:
newfile.append('%s%s"%s"\n' % (directive, separator, value))
else:
newfile.append('%s%s%s\n' % (directive, separator, value))
newfile.append(
format_directive(
directive, value, separator, quotes, quote_char))
else:
newfile.append(line)
fd.close()
if not valueset:
if value is not None:
if quotes:
newfile.append('%s%s"%s"\n' % (directive, separator, value))
else:
newfile.append('%s%s%s\n' % (directive, separator, value))
newfile.append(
format_directive(
directive, value, separator, quotes, quote_char))
fd = open(filename, "w")
fd.write("".join(newfile))