A I forgott the patch.
[2024-01-27 12:11] Philipp <phil...@bureaucracy.de>
> I have noticed that the table-ldap uses printf() to replace the '%s' of
> the filter with the search key. This has some problems. The biggest one
> is you can use the key only once in the filter. So a filter like:
>
> > (|(mail=%s)(uid=%s))
>
> doesn't work.
>
> To fix this I have moved the replacement to the parsval function of aldap.
>
> Philipp
From f35feed68305472168ea3c702c20765fa9e98812 Mon Sep 17 00:00:00 2001
From: Philipp Takacs <phil...@bureaucracy.de>
Date: Tue, 23 Jan 2024 22:06:24 +0100
Subject: [PATCH] table-ldap do the string replace in the ldap parser
This allows filter which uses the key multible times. I.e:
(|(mail=%s)(username=%s))
---
extras/tables/table-ldap/aldap.c | 59 ++++++++++++++++++++-------
extras/tables/table-ldap/aldap.h | 2 +-
extras/tables/table-ldap/table_ldap.c | 11 +++--
3 files changed, 52 insertions(+), 20 deletions(-)
diff --git a/extras/tables/table-ldap/aldap.c b/extras/tables/table-ldap/aldap.c
index 011a820..da63817 100644
--- a/extras/tables/table-ldap/aldap.c
+++ b/extras/tables/table-ldap/aldap.c
@@ -31,12 +31,12 @@
#define ALDAP_VERSION 3
static struct ber_element *ldap_parse_search_filter(struct ber_element *,
- char *);
+ char *, const char *);
static struct ber_element *ldap_do_parse_search_filter(
- struct ber_element *, char **);
+ struct ber_element *, char **, const char *);
char **aldap_get_stringset(struct ber_element *);
char *utoa(char *);
-char *parseval(char *, size_t);
+char *parseval(char *, size_t, const char *);
int aldap_create_page_control(struct ber_element *,
int, struct aldap_page_control *);
@@ -146,7 +146,7 @@ fail:
int
aldap_search(struct aldap *ldap, char *basedn, enum scope scope, char *filter,
- char **attrs, int typesonly, int sizelimit, int timelimit,
+ const char *key, char **attrs, int typesonly, int sizelimit, int timelimit,
struct aldap_page_control *page)
{
struct ber_element *root = NULL, *ber, *c;
@@ -171,7 +171,7 @@ aldap_search(struct aldap *ldap, char *basedn, enum scope scope, char *filter,
goto fail;
}
- if ((ber = ldap_parse_search_filter(ber, filter)) == NULL) {
+ if ((ber = ldap_parse_search_filter(ber, filter, key)) == NULL) {
ldap->err = ALDAP_ERR_PARSER_ERROR;
goto fail;
}
@@ -736,7 +736,7 @@ aldap_get_stringset(struct ber_element *elm)
* NULL, parse failed
*/
static struct ber_element *
-ldap_parse_search_filter(struct ber_element *ber, char *filter)
+ldap_parse_search_filter(struct ber_element *ber, char *filter, const char *key)
{
struct ber_element *elm;
char *cp;
@@ -748,7 +748,7 @@ ldap_parse_search_filter(struct ber_element *ber, char *filter)
return (NULL);
}
- if ((elm = ldap_do_parse_search_filter(ber, &cp)) == NULL)
+ if ((elm = ldap_do_parse_search_filter(ber, &cp, key)) == NULL)
return (NULL);
if (*cp != '\0') {
@@ -778,7 +778,7 @@ ldap_parse_search_filter(struct ber_element *ber, char *filter)
*
*/
static struct ber_element *
-ldap_do_parse_search_filter(struct ber_element *prev, char **cpp)
+ldap_do_parse_search_filter(struct ber_element *prev, char **cpp, const char *key)
{
struct ber_element *elm, *root = NULL;
char *attr_desc, *attr_val, *parsed_val, *cp;
@@ -810,7 +810,7 @@ ldap_do_parse_search_filter(struct ber_element *prev, char **cpp)
while (*cp == '(') {
if ((elm =
- ldap_do_parse_search_filter(elm, &cp)) == NULL)
+ ldap_do_parse_search_filter(elm, &cp, key)) == NULL)
goto bad;
}
@@ -824,7 +824,7 @@ ldap_do_parse_search_filter(struct ber_element *prev, char **cpp)
ber_set_header(root, BER_CLASS_CONTEXT, LDAP_FILT_NOT);
cp++; /* now points to sub-filter */
- if (ldap_do_parse_search_filter(root, &cp) == NULL)
+ if (ldap_do_parse_search_filter(root, &cp, key) == NULL)
goto bad;
if (*cp != ')') /* trailing `)` of filter */
@@ -915,7 +915,7 @@ ldap_do_parse_search_filter(struct ber_element *prev, char **cpp)
else
type = LDAP_FILT_SUBS_ANY;
- if ((parsed_val = parseval(attr_val, len)) ==
+ if ((parsed_val = parseval(attr_val, len, key)) ==
NULL)
goto callfail;
elm = ber_add_nstring(elm, parsed_val,
@@ -930,7 +930,7 @@ ldap_do_parse_search_filter(struct ber_element *prev, char **cpp)
break;
}
- if ((parsed_val = parseval(attr_val, len)) == NULL)
+ if ((parsed_val = parseval(attr_val, len, key)) == NULL)
goto callfail;
elm = ber_add_nstring(elm, parsed_val, strlen(parsed_val));
free(parsed_val);
@@ -1218,13 +1218,13 @@ utoa(char *u)
* the argument u should be a NULL terminated sequence of ASCII bytes.
*/
char *
-parseval(char *p, size_t len)
+parseval(char *p, size_t len, const char *key)
{
char hex[3];
char *cp = p, *buffer, *newbuffer;
- size_t size, newsize, i, j;
+ size_t size, newsize, i, j, keylen;
- size = 50;
+ size = len;
if ((buffer = calloc(1, size)) == NULL)
return NULL;
@@ -1243,12 +1243,41 @@ parseval(char *p, size_t len)
(void)strlcpy(hex, cp + j + 1, sizeof(hex));
buffer[i] = (char)strtoumax(hex, NULL, 16);
j += 3;
+ } else if (cp[j] == '%') {
+ switch (cp[j + 1]) {
+ case '%':
+ buffer[i] = '%';
+ j += 2;
+ break;
+ case 's':
+ if (!key) {
+ free(buffer);
+ return NULL;
+ }
+ keylen = strlen(key);
+ newsize = size + keylen;
+ if ((newbuffer = realloc(buffer, newsize)) == NULL) {
+ free(buffer);
+ return NULL;
+ }
+ buffer = newbuffer;
+ size = newsize;
+ memcpy(buffer + i, key, keylen);
+ i += keylen - 1;
+ j += 2;
+ break;
+ default:
+ buffer[i] = '%';
+ j++;
+ break;
+ }
} else {
buffer[i] = cp[j];
j++;
}
}
+ buffer[i] = 0;
return buffer;
}
diff --git a/extras/tables/table-ldap/aldap.h b/extras/tables/table-ldap/aldap.h
index 7217634..6284d3c 100644
--- a/extras/tables/table-ldap/aldap.h
+++ b/extras/tables/table-ldap/aldap.h
@@ -193,7 +193,7 @@ void aldap_freemsg(struct aldap_message *);
int aldap_bind(struct aldap *, char *, char *);
int aldap_unbind(struct aldap *);
-int aldap_search(struct aldap *, char *, enum scope, char *, char **, int, int, int, struct aldap_page_control *);
+int aldap_search(struct aldap *, char *, enum scope, char *, const char *, char **, int, int, int, struct aldap_page_control *);
int aldap_get_errno(struct aldap *, const char **);
int aldap_get_resultcode(struct aldap_message *);
diff --git a/extras/tables/table-ldap/table_ldap.c b/extras/tables/table-ldap/table_ldap.c
index 0f25c60..5b829b5 100644
--- a/extras/tables/table-ldap/table_ldap.c
+++ b/extras/tables/table-ldap/table_ldap.c
@@ -340,7 +340,7 @@ table_ldap_lookup(int service, struct dict *params, const char *key, char *dst,
}
static int
-ldap_query(const char *filter, char **attributes, char ***outp, size_t n)
+ldap_query(const char *filter, const char *key, char **attributes, char ***outp, size_t n)
{
struct aldap_message *m = NULL;
struct aldap_page_control *pg = NULL;
@@ -348,15 +348,18 @@ ldap_query(const char *filter, char **attributes, char ***outp, size_t n)
size_t i;
char basedn__[MAX_LDAP_BASELEN];
char filter__[MAX_LDAP_FILTERLEN];
+ char key__[MAX_LDAP_IDENTIFIER];
if (strlcpy(basedn__, basedn, sizeof basedn__) >= sizeof basedn__)
return -1;
if (strlcpy(filter__, filter, sizeof filter__) >= sizeof filter__)
return -1;
+ if (strlcpy(key__, key, sizeof key__) >= sizeof key__)
+ return -1;
found = 0;
do {
if ((ret = aldap_search(aldap, basedn__, LDAP_SCOPE_SUBTREE,
- filter__, NULL, 0, 0, 0, pg)) == -1) {
+ filter__, key__, NULL, 0, 0, 0, pg)) == -1) {
log_debug("ret=%d", ret);
return -1;
}
@@ -420,14 +423,14 @@ ldap_run_query(int type, const char *key, char *dst, size_t sz)
return -1;
}
- if (snprintf(filter, sizeof(filter), q->filter, key)
+ if (snprintf(filter, sizeof(filter), "%s", q->filter)
>= (int)sizeof(filter)) {
log_warnx("warn: filter too large");
return -1;
}
memset(res, 0, sizeof(res));
- ret = ldap_query(filter, q->attrs, res, q->attrn);
+ ret = ldap_query(filter, key, q->attrs, res, q->attrn);
if (ret <= 0 || dst == NULL)
goto end;
--
2.39.2
