ef8e4da010
Commit ad7e54d698 introduced the use
of _krb5_expand_path_tokens() to expand tokens (and on Windows convert
path delimiters) within credential cache names. This is safe to do
for the path based credential cache types FILE, DIR and SCC but on
Windows is unsafe for the non-path types.
For example on Windows, the API credential cache names are often based
on the principal name and the principal name is parsed from the ccname.
This practice was introduced with the version v2 ccapi when there was
no method of enumerating the caches from the krb5 library.
This change adds a "filepath" boolean parameter to _krb5_expand_path_tokens()
which is set to TRUE (non-zero) when the input is a file path and FALSE
(zero) when the input is not a file path. _krb5_expand_path_tokens() will
only perform directory separator normalization on Windows when the
"filepath" parameter is TRUE.
This change is not the preferred solution because it requires that the
library be aware of all credential cache types that use path based
residuals. The preferred solution would require that the credential cache
implementation indicate whether or not it uses a path based residual.
This change has been implemented using a prefix test and not a change to
struct krb5_cc_ops because existing ccache plugins will not know how to
advertise their use of path based residuals and that path expansion is
safe.
Change-Id: I8135991e8ce69fc5273d381ea9c2078bc2bcd19a
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/*
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* Copyright (c) 2003 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of KTH nor the names of its contributors may be
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* used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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#include "krb5_locl.h"
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#include <getarg.h>
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#include <err.h>
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static int version_flag = 0;
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static int help_flag = 0;
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static struct getargs args[] = {
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{"help", 0, arg_flag, &help_flag,
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NULL, NULL }
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};
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static void
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usage (int ret)
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{
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arg_printusage (args,
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sizeof(args)/sizeof(*args),
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NULL,
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"");
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exit (ret);
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}
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int
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main(int argc, char **argv)
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{
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krb5_context context;
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krb5_error_code ret;
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int optidx = 0;
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char *expanded;
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setprogname(argv[0]);
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if (getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
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usage(1);
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if (help_flag)
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usage (0);
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if (version_flag){
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print_version(NULL);
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exit(0);
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}
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argc -= optidx;
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argv += optidx;
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ret = krb5_init_context(&context);
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if (ret)
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errx (1, "krb5_init_context failed: %d", ret);
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ret = _krb5_expand_path_tokensv(context, "/tmp/%{foo}/%{bar}%{baz}/x", 0,
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&expanded,
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"foo", "abc",
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"bar", "dce",
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"baz", "fgh",
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NULL);
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if (ret)
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krb5_err(context, ret, 1, "Token expansion failed");
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#ifdef _WIN32
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#define EXPANDED_SHOULD_BE "\\tmp\\abc\\dcefgh\\x"
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#else
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#define EXPANDED_SHOULD_BE "/tmp/abc/dcefgh/x"
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#endif
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if (strcmp(expanded, EXPANDED_SHOULD_BE))
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krb5_errx(context, 1, "Token expansion incorrect");
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krb5_free_context(context);
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return 0;
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}
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