From 3229c2107e4645240cfc4aa5d262e5330c356a49 Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Thu, 21 Feb 2013 13:12:25 +0100 Subject: [PATCH] sysdb: try dealing with binary-content attributes I have here a LDAP user entry which has this attribute loginAllowedTimeMap:: AAAAAAAAAP///38AAP///38AAP///38AAP///38AAP///38AAAAAAAAA In the function sysdb_attrs_add_string(), called from sdap_attrs_add_ldap_attr(), strlen() is called on this blob, which is the wrong thing to do. The result of strlen is then used to populate the .v_length member of a struct ldb_val - and this will set it to zero in this case. (There is also the problem that there may not be a '\0' at all in the blob.) Subsequently, .v_length being 0 makes ldb_modify(), called from sysdb_set_entry_attr(), return LDB_ERR_INVALID_ATTRIBUTE_SYNTAX. End result is that users do not get stored in the sysdb, and programs like `id` or `getent ...` show incomplete information. The bug was encountered with sssd-1.8.5. sssd-1.5.11 seemed to behave fine, but that may not mean that is the absolute lower boundary of introduction of the problem. --- src/db/sysdb.c | 10 ++++++++++ src/db/sysdb.h | 2 ++ src/providers/ldap/sdap.c | 7 +++---- src/providers/ldap/sdap_async.c | 4 ++-- 4 files changed, 17 insertions(+), 6 deletions(-) diff --git a/src/db/sysdb.c b/src/db/sysdb.c index e7524f4..7c34791 100644 --- a/src/db/sysdb.c +++ b/src/db/sysdb.c @@ -512,6 +512,16 @@ int sysdb_attrs_add_string(struct sysdb_attrs *attrs, return sysdb_attrs_add_val(attrs, name, &v); } +int sysdb_attrs_add_mem(struct sysdb_attrs *attrs, const char *name, + const void *mem, size_t size) +{ + struct ldb_val v; + + v.data = discard_const(mem); + v.length = size; + return sysdb_attrs_add_val(attrs, name, &v); +} + int sysdb_attrs_add_bool(struct sysdb_attrs *attrs, const char *name, bool value) { diff --git a/src/db/sysdb.h b/src/db/sysdb.h index fff97a8..23cbbb0 100644 --- a/src/db/sysdb.h +++ b/src/db/sysdb.h @@ -250,6 +250,8 @@ int sysdb_attrs_add_val(struct sysdb_attrs *attrs, const char *name, const struct ldb_val *val); int sysdb_attrs_add_string(struct sysdb_attrs *attrs, const char *name, const char *str); +int sysdb_attrs_add_mem(struct sysdb_attrs *, const char *, + const void *, size_t); int sysdb_attrs_add_bool(struct sysdb_attrs *attrs, const char *name, bool value); int sysdb_attrs_add_long(struct sysdb_attrs *attrs, diff --git a/src/providers/ldap/sdap.c b/src/providers/ldap/sdap.c index 371121b..988f27d 100644 --- a/src/providers/ldap/sdap.c +++ b/src/providers/ldap/sdap.c @@ -474,10 +474,9 @@ errno_t sdap_parse_deref(TALLOC_CTX *mem_ctx, for (i=0; dval->vals[i].bv_val; i++) { DEBUG(9, ("Dereferenced attribute value: %s\n", dval->vals[i].bv_val)); - v.data = (uint8_t *) dval->vals[i].bv_val; - v.length = dval->vals[i].bv_len; - - ret = sysdb_attrs_add_val(res[mi]->attrs, name, &v); + ret = sysdb_attrs_add_mem(res[mi]->attrs, name, + dval->vals[i].bv_val, + dval->vals[i].bv_len); if (ret) goto done; } } diff --git a/src/providers/ldap/sdap_async.c b/src/providers/ldap/sdap_async.c index 84497b7..b7d9839 100644 --- a/src/providers/ldap/sdap_async.c +++ b/src/providers/ldap/sdap_async.c @@ -2226,8 +2226,8 @@ sdap_attrs_add_ldap_attr(struct sysdb_attrs *ldap_attrs, DEBUG(SSSDBG_TRACE_INTERNAL, ("Adding %s [%s] to attributes " "of [%s].\n", desc, el->values[i].data, objname)); - ret = sysdb_attrs_add_string(attrs, attr_name, - (const char *) el->values[i].data); + ret = sysdb_attrs_add_mem(attrs, attr_name, el->values[i].data, + el->values[i].length); if (ret) { return ret; } -- 1.7.10.4