Re: [PATCH] libsemanage: allow spaces in user/group names

"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(a)redhat.com&gt; --- 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;