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Add new LDAP utility functions.

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* dirmngr/Makefile.am (module_tests): New variable.
(noinst_PROGRAMS): New primary.  Set it to $(module_tests).
(TESTS): New variable.  Set it to $(module_tests).
(t_common_src): New variable.
(t_common_ldadd): Likewise.
(t_ldap_parse_uri_SOURCES): New primary.
(t_ldap_parse_uri_LDADD): Likewise.
* dirmngr/ldap-parse-uri.c: New file.
* dirmngr/ldap-parse-uri.h: Likewise.
* dirmngr/t-ldap-parse-uri.c: Likewise.
* dirmngr/t-support.h: Likewise.

--
Signed-off-by: Neal H. Walfield <neal@g10code.de>
This commit is contained in:
Neal H. Walfield 2015-03-13 13:39:40 +01:00
parent e23b3ba5ff
commit 1a75b7c39f
5 changed files with 580 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
dirmngr/Makefile.am
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@ -27,6 +27,9 @@ if USE_LDAPWRAPPER
libexec_PROGRAMS = dirmngr_ldap
endif
noinst_PROGRAMS = $(module_tests)
TESTS = $(module_tests)
AM_CPPFLAGS = -I$(top_srcdir)/gl -I$(top_srcdir)/intl -I$(top_srcdir)/common
include $(top_srcdir)/am/cmacros.am
@ -99,4 +102,14 @@ no-libgcrypt.c : $(top_srcdir)/tools/no-libgcrypt.c
cat $(top_srcdir)/tools/no-libgcrypt.c > no-libgcrypt.c
t_common_src = t-support.h
# We need libcommontls, because we use the http functions.
t_common_ldadd = $(libcommontls) $(libcommon) no-libgcrypt.o $(GPG_ERROR_LIBS)
module_tests = t-ldap-parse-uri
t_ldap_parse_uri_SOURCES = \
t-ldap-parse-uri.c ldap-parse-uri.c ldap-parse-uri.h \
$(t_common_src)
t_ldap_parse_uri_LDADD = $(ldaplibs) $(t_common_ldadd)
$(PROGRAMS) : $(libcommon) $(libcommonpth) $(libcommontls) $(libcommontlsnpth)

237
dirmngr/ldap-parse-uri.c Normal file
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@ -0,0 +1,237 @@
/* ldap-parse-uri.c - Parse an LDAP URI.
* Copyright (C) 2015 g10 Code GmbH
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <gpg-error.h>
#ifdef HAVE_W32_SYSTEM
# include "ldap-url.h"
#else
# include <ldap.h>
#endif
#include "util.h"
#include "http.h"
/* Returns 1 if the string is an LDAP URL (begins with ldap:, ldaps:
or ldapi:). */
int
ldap_uri_p (const char *url)
{
char *colon = strchr (url, ':');
if (! colon)
return 0;
else
{
int offset = (uintptr_t) colon - (uintptr_t) url;
if (/* All lower case. */
(offset == 4 && memcmp (url, "ldap", 4) == 0)
|| (offset == 5
&& (memcmp (url, "ldaps", 5) == 0
&& memcmp (url, "ldapi", 5) == 0))
/* Mixed case. */
|| ((url[0] == 'l' || url[0] == 'L')
&& (url[1] == 'd' || url[1] == 'D')
&& (url[2] == 'a' || url[2] == 'A')
&& (url[3] == 'p' || url[3] == 'P')
&& (url[4] == ':'
|| ((url[4] == 's' || url[4] == 'S'
|| url[4] == 'i' || url[4] == 'i')
&& url[5] == ':'))))
return 1;
return 0;
}
}
/* Parse a URI and put the result into *purip. On success the
caller must use http_release_parsed_uri() to releases the resources.
uri->path is the base DN (or NULL for the default).
uri->auth is the bindname (or NULL for none).
The uri->query variable "password" is the password.
Note: any specified scope, any attributes, any filter and any
unknown extensions are simply ignored. */
gpg_error_t
ldap_parse_uri (parsed_uri_t *purip, const char *uri)
{
gpg_err_code_t err = 0;
parsed_uri_t puri = NULL;
int result;
LDAPURLDesc *lud = NULL;
char *scheme = NULL;
char *host = NULL;
char *dn = NULL;
char *bindname = NULL;
char *password = NULL;
char **s;
char *buffer;
int len;
result = ldap_url_parse (uri, &lud);
if (result != 0)
{
log_error ("Unable to parse LDAP uri '%s'\n", uri);
err = GPG_ERR_ASS_GENERAL;
goto out;
}
scheme = lud->lud_scheme;
host = lud->lud_host;
dn = lud->lud_dn;
for (s = lud->lud_exts; s && *s; s ++)
{
if (strncmp (*s, "bindname=", 9) == 0)
{
if (bindname)
log_error ("bindname given multiple times in URL '%s', ignoring.\n",
uri);
else
bindname = *s + 9;
}
else if (strncmp (*s, "password=", 9) == 0)
{
if (password)
log_error ("password given multiple times in URL '%s', ignoring.\n",
uri);
else
password = *s + 9;
}
else
log_error ("Unhandled extension (%s) in URL '%s', ignoring.",
*s, uri);
}
len = 0;
#define add(s) ({ if (s) len += strlen (s) + 1; })
add (scheme);
add (host);
add (dn);
add (bindname);
add (password);
puri = xtrycalloc (1, sizeof *puri + len);
if (! puri)
{
err = gpg_err_code_from_syserror ();
goto out;
}
buffer = puri->buffer;
#define copy(s) \
({ \
char *copy_result = NULL; \
if (s) \
{ \
copy_result = buffer; \
buffer = stpcpy (buffer, s) + 1; \
} \
copy_result; \
})
puri->scheme = ascii_strlwr (copy (scheme));
puri->host = copy (host);
puri->path = copy (dn);
puri->auth = copy (bindname);
if (password)
{
puri->query = calloc (sizeof (*puri->query), 1);
puri->query->name = "password";
puri->query->value = copy (password);
puri->query->valuelen = strlen (password) + 1;
}
puri->use_tls = strcmp (puri->scheme, "ldaps") == 0;
puri->port = lud->lud_port;
out:
if (lud)
ldap_free_urldesc (lud);
if (err)
{
if (puri)
http_release_parsed_uri (puri);
}
else
*purip = puri;
return gpg_err_make (default_errsource, err);
}
/* The following characters need to be escaped to be part of an LDAP
filter: *, (, ), \, NUL and /. Note: we don't handle NUL, since a
NUL can't be part of a C string.
This function always allocates a new string on success. It is the
caller's responsibility to free it.
*/
char *
ldap_escape_filter (const char *filter)
{
int l = strcspn (filter, "*()\\/");
if (l == strlen (filter))
/* Nothing to escape. */
return xstrdup (filter);
{
/* In the worst case we need to escape every letter. */
char *escaped = xmalloc (1 + 3 * strlen (filter));
/* Indices into filter and escaped. */
int filter_i = 0;
int escaped_i = 0;
for (filter_i = 0; filter_i < strlen (filter); filter_i ++)
{
switch (filter[filter_i])
{
case '*':
case '(':
case ')':
case '\\':
case '/':
sprintf (&escaped[escaped_i], "%%%02x", filter[filter_i]);
escaped_i += 3;
break;
default:
escaped[escaped_i ++] = filter[filter_i];
break;
}
}
/* NUL terminate it. */
escaped[escaped_i] = 0;
/* We could shrink escaped to be just escaped_i bytes, but the
result will probably be freed very quickly anyways. */
return escaped;
}
}

33
dirmngr/ldap-parse-uri.h Normal file
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@ -0,0 +1,33 @@
/* ldap-parse-uri.h - Parse an LDAP URI.
* Copyright (C) 2015 g10 Code GmbH
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DIRMNGR_LDAP_PARSE_URI_H
#define DIRMNGR_LDAP_PARSE_URI_H
#include "util.h"
#include "http.h"
extern int ldap_uri_p (const char *url);
extern gpg_error_t ldap_parse_uri (parsed_uri_t *ret_uri, const char *uri);
extern char *ldap_escape_filter (const char *filter);
#endif

255
dirmngr/t-ldap-parse-uri.c Normal file
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@ -0,0 +1,255 @@
/* t-ldap-parse-uri.c - Regression tests for ldap-parse-uri.c.
* Copyright (C) 2015 g10 Code GmbH
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "ldap-parse-uri.h"
#include "t-support.h"
struct test_ldap_uri_p
{
const char *uri;
int result;
};
void
check_ldap_uri_p (int test_count, struct test_ldap_uri_p *test)
{
int result = ldap_uri_p (test->uri);
if (result != test->result)
{
printf ("'%s' is %san LDAP schema, but ldap_uri_p says opposite.\n",
test->uri, test->result ? "" : "not ");
fail(1000 * test_count);
}
}
static void
test_ldap_uri_p (void)
{
struct test_ldap_uri_p tests[] = {
{ "ldap://foo", 1 },
{ "ldap://", 1 },
{ "ldap:", 1 },
{ "ldap", 0 },
{ "ldapfoobar", 0 },
{ "ldaps://foo", 1 },
{ "ldaps://", 1 },
{ "ldaps:", 1 },
{ "ldaps", 0 },
{ "ldapsfoobar", 0 },
{ "ldapi://foo", 1 },
{ "ldapi://", 1 },
{ "ldapi:", 1 },
{ "ldapi", 0 },
{ "ldapifoobar", 0 },
{ "LDAP://FOO", 1 },
{ "LDAP://", 1 },
{ "LDAP:", 1 },
{ "LDAP", 0 },
{ "LDAPFOOBAR", 0 }
};
int test_count;
for (test_count = 1;
test_count <= sizeof (tests) / sizeof (tests[0]);
test_count ++)
check_ldap_uri_p (test_count, &tests[test_count - 1]);
}
struct test_ldap_parse_uri
{
const char *uri;
const char *scheme;
const char *host;
const int port;
const int use_tls;
const char *path; /* basedn. */
const char *auth; /* binddn. */
const char *password; /* query[1]. */
};
static int
cmp (const char *a, const char *b)
{
if (! a)
a = "";
if (! b)
b = "";
return strcmp (a, b) == 0;
}
void
check_ldap_parse_uri (int test_count, struct test_ldap_parse_uri *test)
{
gpg_error_t err;
parsed_uri_t puri;
err = ldap_parse_uri (&puri, test->uri);
if (err)
{
printf ("Parsing '%s' failed (%d).\n", test->uri, err);
fail (test_count * 1000 + 0);
}
if (! cmp(test->scheme, puri->scheme))
{
printf ("scheme mismatch: got '%s', expected '%s'.\n",
puri->scheme, test->scheme);
fail (test_count * 1000 + 1);
}
if (! cmp(test->host, puri->host))
{
printf ("host mismatch: got '%s', expected '%s'.\n",
puri->host, test->host);
fail (test_count * 1000 + 2);
}
if (test->port != puri->port)
{
printf ("port mismatch: got '%d', expected '%d'.\n",
puri->port, test->port);
fail (test_count * 1000 + 3);
}
if (test->use_tls != puri->use_tls)
{
printf ("use_tls mismatch: got '%d', expected '%d'.\n",
puri->use_tls, test->use_tls);
fail (test_count * 1000 + 4);
}
if (! cmp(test->path, puri->path))
{
printf ("path mismatch: got '%s', expected '%s'.\n",
puri->path, test->path);
fail (test_count * 1000 + 5);
}
if (! cmp(test->auth, puri->auth))
{
printf ("auth mismatch: got '%s', expected '%s'.\n",
puri->auth, test->auth);
fail (test_count * 1000 + 6);
}
if (! test->password && ! puri->query)
/* Ok. */
;
else if (test->password && ! puri->query)
{
printf ("password mismatch: got NULL, expected '%s'.\n",
test->auth);
fail (test_count * 1000 + 7);
}
else if (! test->password && puri->query)
{
printf ("password mismatch: got something, expected NULL.\n");
fail (test_count * 1000 + 8);
}
else if (! (test->password && puri->query
&& puri->query->name && puri->query->value
&& strcmp (puri->query->name, "password") == 0
&& cmp (puri->query->value, test->password)))
{
printf ("password mismatch: got '%s:%s', expected 'password:%s'.\n",
puri->query->name, puri->query->value,
test->password);
fail (test_count * 1000 + 9);
}
http_release_parsed_uri (puri);
}
static void
test_ldap_parse_uri (void)
{
struct test_ldap_parse_uri tests[] = {
{ "ldap://", "ldap", NULL, 389, 0, NULL, NULL, NULL },
{ "ldap://host", "ldap", "host", 389, 0, NULL, NULL, NULL },
{ "ldap://host:100", "ldap", "host", 100, 0, NULL, NULL, NULL },
{ "ldaps://host", "ldaps", "host", 636, 1, NULL, NULL, NULL },
{ "ldap://host/ou%3DPGP%20Keys%2Cdc%3DEXAMPLE%2Cdc%3DORG",
"ldap", "host", 389, 0, "ou=PGP Keys,dc=EXAMPLE,dc=ORG" },
{ "ldap://host/????bindname=uid%3Duser%2Cou%3DPGP%20Users%2Cdc%3DEXAMPLE%2Cdc%3DORG,password=foobar",
"ldap", "host", 389, 0, "",
"uid=user,ou=PGP Users,dc=EXAMPLE,dc=ORG", "foobar" }
};
int test_count;
for (test_count = 1;
test_count <= sizeof (tests) / sizeof (tests[0]);
test_count ++)
check_ldap_parse_uri (test_count, &tests[test_count - 1]);
}
struct test_ldap_escape_filter
{
const char *filter;
const char *result;
};
static void
check_ldap_escape_filter (int test_count, struct test_ldap_escape_filter *test)
{
char *result = ldap_escape_filter (test->filter);
if (strcmp (result, test->result) != 0)
{
printf ("Filter: '%s'. Escaped: '%s'. Expected: '%s'.\n",
test->filter, result, test->result);
fail (test_count * 1000);
}
}
static void
test_ldap_escape_filter (void)
{
struct test_ldap_escape_filter tests[] = {
{ "foobar", "foobar" },
{ "", "" },
{ "(foo)", "%28foo%29" },
{ "* ( ) \\ /", "%2a %28 %29 %5c %2f" }
};
int test_count;
for (test_count = 1;
test_count <= sizeof (tests) / sizeof (tests[0]);
test_count ++)
check_ldap_escape_filter (test_count, &tests[test_count - 1]);
}
int
main (int argc, char **argv)
{
(void)argc;
(void)argv;
test_ldap_uri_p ();
test_ldap_parse_uri ();
test_ldap_escape_filter ();
return 0;
}

42
dirmngr/t-support.h Normal file
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@ -0,0 +1,42 @@
/* t-support.h - Helper for the regression tests
* Copyright (C) 2007 Free Software Foundation, Inc.
*
* This file is part of JNLIB, which is a subsystem of GnuPG.
*
* JNLIB is free software; you can redistribute it and/or modify it
* under the terms of either
*
* - the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* or
*
* - the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* or both in parallel, as here.
*
* JNLIB is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copies of the GNU General Public License
* and the GNU Lesser General Public License along with this program;
* if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DIRMNGR_T_SUPPORT_H
#define DIRMNGR_T_SUPPORT_H 1
/* Macros to print the result of a test. */
#define pass() do { ; } while(0)
#define fail(a) do { fprintf (stderr, "%s:%d: test %d failed\n",\
__FILE__,__LINE__, (a)); \
exit (1); \
} while(0)
#endif /* DIRMNGR_T_SUPPORT_H */