[PATCH] libsemanage: allow spaces in user/group names
Vit Mojzis
vmojzis at redhat.com
Thu Feb 17 11:10:01 UTC 2022
"semanage login -a" accepts whitespaces in user/group name
(e.g. users/groups from Active Directory), which may lead to issues down
the line since libsemanage doesn't expect whitespaces in
/var/lib/selinux/targeted/active/seusers and other config files.
Fixes:
Artificial but simple reproducer
# groupadd server_admins
# sed -i "s/^server_admins/server admins/" /etc/group
# semanage login -a -s staff_u %server\ admins
# semanage login -l (or "semodule -B")
libsemanage.parse_assert_ch: expected character ':', but found 'a' (/var/lib/selinux/targeted/active/seusers: 6):
%server admins:staff_u:s0-s0:c0.c1023 (No such file or directory).
libsemanage.seuser_parse: could not parse seuser record (No such file or directory).
libsemanage.dbase_file_cache: could not cache file database (No such file or directory).
libsemanage.enter_ro: could not enter read-only section (No such file or directory).
FileNotFoundError: [Errno 2] No such file or directory
Signed-off-by: Vit Mojzis <vmojzis at redhat.com>
---
libsemanage/src/booleans_file.c | 2 +-
libsemanage/src/fcontexts_file.c | 6 +++---
libsemanage/src/ibendports_file.c | 4 ++--
libsemanage/src/ibpkeys_file.c | 4 ++--
libsemanage/src/interfaces_file.c | 6 +++---
libsemanage/src/nodes_file.c | 8 ++++----
libsemanage/src/parse_utils.c | 6 +++---
libsemanage/src/parse_utils.h | 11 +++++------
libsemanage/src/ports_file.c | 4 ++--
libsemanage/src/seusers_file.c | 6 +++---
libsemanage/src/users_base_file.c | 7 +++----
libsemanage/src/users_extra_file.c | 4 ++--
12 files changed, 33 insertions(+), 35 deletions(-)
diff --git a/libsemanage/src/booleans_file.c b/libsemanage/src/booleans_file.c
index f79d0b44..6d600bbc 100644
--- a/libsemanage/src/booleans_file.c
+++ b/libsemanage/src/booleans_file.c
@@ -48,7 +48,7 @@ static int bool_parse(semanage_handle_t * handle,
goto last;
/* Extract name */
- if (parse_fetch_string(handle, info, &str, '=') < 0)
+ if (parse_fetch_string(handle, info, &str, '=', 0) < 0)
goto err;
if (semanage_bool_set_name(handle, boolean, str) < 0)
diff --git a/libsemanage/src/fcontexts_file.c b/libsemanage/src/fcontexts_file.c
index 04cd365a..f3579410 100644
--- a/libsemanage/src/fcontexts_file.c
+++ b/libsemanage/src/fcontexts_file.c
@@ -90,7 +90,7 @@ static int fcontext_parse(semanage_handle_t * handle,
goto last;
/* Regexp */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_fcontext_set_expr(handle, fcontext, str) < 0)
goto err;
@@ -100,7 +100,7 @@ static int fcontext_parse(semanage_handle_t * handle,
/* Type */
if (parse_assert_space(handle, info) < 0)
goto err;
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (!strcasecmp(str, "-s"))
semanage_fcontext_set_type(fcontext, SEMANAGE_FCONTEXT_SOCK);
@@ -124,7 +124,7 @@ static int fcontext_parse(semanage_handle_t * handle,
/* Context */
if (parse_assert_space(handle, info) < 0)
goto err;
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
process_context:
diff --git a/libsemanage/src/ibendports_file.c b/libsemanage/src/ibendports_file.c
index bafa8c1d..2fa2a67c 100644
--- a/libsemanage/src/ibendports_file.c
+++ b/libsemanage/src/ibendports_file.c
@@ -75,7 +75,7 @@ static int ibendport_parse(semanage_handle_t *handle,
goto err;
/* IB Device Name */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_ibendport_set_ibdev_name(handle, ibendport, str) < 0)
goto err;
@@ -92,7 +92,7 @@ static int ibendport_parse(semanage_handle_t *handle,
/* context */
if (parse_assert_space(handle, info) < 0)
goto err;
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_context_from_string(handle, str, &con) < 0) {
ERR(handle, "invalid security context \"%s\" (%s: %u)\n%s",
diff --git a/libsemanage/src/ibpkeys_file.c b/libsemanage/src/ibpkeys_file.c
index 929bc31e..edde69f0 100644
--- a/libsemanage/src/ibpkeys_file.c
+++ b/libsemanage/src/ibpkeys_file.c
@@ -80,7 +80,7 @@ static int ibpkey_parse(semanage_handle_t *handle,
goto err;
/* Subnet Prefix */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_ibpkey_set_subnet_prefix(handle, ibpkey, str) < 0)
goto err;
@@ -115,7 +115,7 @@ static int ibpkey_parse(semanage_handle_t *handle,
semanage_ibpkey_set_pkey(ibpkey, low);
}
/* Pkey context */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_context_from_string(handle, str, &con) < 0) {
ERR(handle, "invalid security context \"%s\" (%s: %u)\n%s",
diff --git a/libsemanage/src/interfaces_file.c b/libsemanage/src/interfaces_file.c
index c19c8f94..244f0ae5 100644
--- a/libsemanage/src/interfaces_file.c
+++ b/libsemanage/src/interfaces_file.c
@@ -72,7 +72,7 @@ static int iface_parse(semanage_handle_t * handle,
goto err;
/* Name */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_iface_set_name(handle, iface, str) < 0)
goto err;
@@ -82,7 +82,7 @@ static int iface_parse(semanage_handle_t * handle,
/* Interface context */
if (parse_assert_space(handle, info) < 0)
goto err;
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_context_from_string(handle, str, &con) < 0) {
ERR(handle, "invalid security context \"%s\" (%s: %u)\n%s",
@@ -106,7 +106,7 @@ static int iface_parse(semanage_handle_t * handle,
/* Message context */
if (parse_assert_space(handle, info) < 0)
goto err;
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_context_from_string(handle, str, &con) < 0) {
ERR(handle, "invalid security context \"%s\" (%s: %u)\n%s",
diff --git a/libsemanage/src/nodes_file.c b/libsemanage/src/nodes_file.c
index c3647f2a..2d2b7fe0 100644
--- a/libsemanage/src/nodes_file.c
+++ b/libsemanage/src/nodes_file.c
@@ -77,7 +77,7 @@ static int node_parse(semanage_handle_t * handle,
goto err;
/* Protocol */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (!strcasecmp(str, "ipv4"))
proto = SEMANAGE_PROTO_IP4;
@@ -96,7 +96,7 @@ static int node_parse(semanage_handle_t * handle,
/* Address */
if (parse_assert_space(handle, info) < 0)
goto err;
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_node_set_addr(handle, node, proto, str) < 0)
goto err;
@@ -106,7 +106,7 @@ static int node_parse(semanage_handle_t * handle,
str = NULL;
/* Netmask */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_node_set_mask(handle, node, proto, str) < 0)
goto err;
@@ -116,7 +116,7 @@ static int node_parse(semanage_handle_t * handle,
str = NULL;
/* Port context */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_context_from_string(handle, str, &con) < 0) {
ERR(handle, "invalid security context \"%s\" (%s: %u)\n%s",
diff --git a/libsemanage/src/parse_utils.c b/libsemanage/src/parse_utils.c
index 4fb54fc3..918dee43 100644
--- a/libsemanage/src/parse_utils.c
+++ b/libsemanage/src/parse_utils.c
@@ -239,7 +239,7 @@ int parse_fetch_int(semanage_handle_t * handle,
char *test = NULL;
int value = 0;
- if (parse_fetch_string(handle, info, &str, delim) < 0)
+ if (parse_fetch_string(handle, info, &str, delim, 0) < 0)
goto err;
if (!isdigit((int)*str)) {
@@ -267,7 +267,7 @@ int parse_fetch_int(semanage_handle_t * handle,
}
int parse_fetch_string(semanage_handle_t * handle,
- parse_info_t * info, char **str, char delim)
+ parse_info_t * info, char **str, char delim, int allow_spaces)
{
char *start = info->ptr;
@@ -277,7 +277,7 @@ int parse_fetch_string(semanage_handle_t * handle,
if (parse_assert_noeof(handle, info) < 0)
goto err;
- while (*(info->ptr) && !isspace(*(info->ptr)) &&
+ while (*(info->ptr) && (allow_spaces || !isspace(*(info->ptr))) &&
(*(info->ptr) != delim)) {
info->ptr++;
len++;
diff --git a/libsemanage/src/parse_utils.h b/libsemanage/src/parse_utils.h
index 0f334860..3e44aca1 100644
--- a/libsemanage/src/parse_utils.h
+++ b/libsemanage/src/parse_utils.h
@@ -71,12 +71,11 @@ extern int parse_optional_str(parse_info_t * info, const char *str);
int parse_fetch_int(semanage_handle_t * hgandle,
parse_info_t * info, int *num, char delim);
-/* Extract the next string (delimited by
- * whitespace), and move the read pointer past it.
- * Stop of the optional character delim is encountered,
- * or if whitespace/eof is encountered. Fail if the
- * string is of length 0. */
+/* Extract the next string and move the read pointer past it.
+ * Stop if the optional character delim (or eof) is encountered,
+ * or if whitespace is encountered and allow_spaces is 0.
+ * Fail if the string is of length 0. */
extern int parse_fetch_string(semanage_handle_t * handle,
- parse_info_t * info, char **str_ptr, char delim);
+ parse_info_t * info, char **str_ptr, char delim, int allow_spaces);
#endif
diff --git a/libsemanage/src/ports_file.c b/libsemanage/src/ports_file.c
index ade4102f..1356021a 100644
--- a/libsemanage/src/ports_file.c
+++ b/libsemanage/src/ports_file.c
@@ -77,7 +77,7 @@ static int port_parse(semanage_handle_t * handle,
goto err;
/* Protocol */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (!strcasecmp(str, "tcp"))
semanage_port_set_proto(port, SEMANAGE_PROTO_TCP);
@@ -123,7 +123,7 @@ static int port_parse(semanage_handle_t * handle,
semanage_port_set_port(port, low);
/* Port context */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_context_from_string(handle, str, &con) < 0) {
ERR(handle, "invalid security context \"%s\" (%s: %u)\n%s",
diff --git a/libsemanage/src/seusers_file.c b/libsemanage/src/seusers_file.c
index 910bedf4..21b970ac 100644
--- a/libsemanage/src/seusers_file.c
+++ b/libsemanage/src/seusers_file.c
@@ -53,7 +53,7 @@ static int seuser_parse(semanage_handle_t * handle,
goto last;
/* Extract name */
- if (parse_fetch_string(handle, info, &str, ':') < 0)
+ if (parse_fetch_string(handle, info, &str, ':', 1) < 0)
goto err;
if (semanage_seuser_set_name(handle, seuser, str) < 0)
goto err;
@@ -68,7 +68,7 @@ static int seuser_parse(semanage_handle_t * handle,
goto err;
/* Extract sename */
- if (parse_fetch_string(handle, info, &str, ':') < 0)
+ if (parse_fetch_string(handle, info, &str, ':', 1) < 0)
goto err;
if (semanage_seuser_set_sename(handle, seuser, str) < 0)
goto err;
@@ -83,7 +83,7 @@ static int seuser_parse(semanage_handle_t * handle,
goto err;
/* NOTE: does not allow spaces/multiline */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_seuser_set_mlsrange(handle, seuser, str) < 0)
diff --git a/libsemanage/src/users_base_file.c b/libsemanage/src/users_base_file.c
index 0f0a8fdb..a0f8cd7e 100644
--- a/libsemanage/src/users_base_file.c
+++ b/libsemanage/src/users_base_file.c
@@ -83,7 +83,7 @@ static int user_base_parse(semanage_handle_t * handle,
goto err;
/* Parse user name */
- if (parse_fetch_string(handle, info, &name_str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &name_str, ' ', 0) < 0)
goto err;
if (semanage_user_base_set_name(handle, user, name_str) < 0) {
@@ -150,7 +150,7 @@ static int user_base_parse(semanage_handle_t * handle,
goto err;
/* NOTE: does not allow spaces/multiline */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_user_base_set_mlslevel(handle, user, str) < 0)
goto err;
@@ -165,8 +165,7 @@ static int user_base_parse(semanage_handle_t * handle,
if (parse_assert_space(handle, info) < 0)
goto err;
- /* NOTE: does not allow spaces/multiline */
- if (parse_fetch_string(handle, info, &str, ';') < 0)
+ if (parse_fetch_string(handle, info, &str, ';', 1) < 0)
goto err;
if (semanage_user_base_set_mlsrange(handle, user, str) < 0)
goto err;
diff --git a/libsemanage/src/users_extra_file.c b/libsemanage/src/users_extra_file.c
index 8f2bebd6..7aa9df3c 100644
--- a/libsemanage/src/users_extra_file.c
+++ b/libsemanage/src/users_extra_file.c
@@ -57,7 +57,7 @@ static int user_extra_parse(semanage_handle_t * handle,
goto err;
/* Extract name */
- if (parse_fetch_string(handle, info, &str, ' ') < 0)
+ if (parse_fetch_string(handle, info, &str, ' ', 0) < 0)
goto err;
if (semanage_user_extra_set_name(handle, user_extra, str) < 0)
goto err;
@@ -73,7 +73,7 @@ static int user_extra_parse(semanage_handle_t * handle,
goto err;
/* Extract prefix */
- if (parse_fetch_string(handle, info, &str, ';') < 0)
+ if (parse_fetch_string(handle, info, &str, ';', 1) < 0)
goto err;
if (semanage_user_extra_set_prefix(handle, user_extra, str) < 0)
goto err;
--
2.30.2
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