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authorMatthias Dieter Wallnöfer <mwallnoefer@yahoo.de>2009-10-24 20:21:04 +0200
committerMatthias Dieter Wallnöfer <mwallnoefer@yahoo.de>2009-11-05 12:43:02 +0100
commit85f61e5342bd3b57983045d54de3d824c81079b2 (patch)
tree71e2f2184cffdaa0b0d93c689940a81ac88e4177 /source4/dsdb/common
parent3a6bde799d7fd7dffddbde885abe991407233c07 (diff)
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s4:dsdb/common/util - Add a new utility function "samdb_check_password"
This function performs basic password checks and will be used by the "samrValidatePassword" call and the "password_hash" module.
Diffstat (limited to 'source4/dsdb/common')
-rw-r--r--source4/dsdb/common/util.c54
1 files changed, 45 insertions, 9 deletions
diff --git a/source4/dsdb/common/util.c b/source4/dsdb/common/util.c
index bd21e74ac9..d953e634be 100644
--- a/source4/dsdb/common/util.c
+++ b/source4/dsdb/common/util.c
@@ -1574,17 +1574,53 @@ int samdb_search_for_parent_domain(struct ldb_context *ldb, TALLOC_CTX *mem_ctx,
/*
- set the user password using plaintext, obeying any user or domain
- password restrictions
+ * Performs checks on a user password (plaintext UTF 16 format - attribute
+ * "password"). The remaining parameters have to be extracted from the domain
+ * object in the AD.
+ *
+ * Result codes from "enum samr_ValidationStatus" (consider "samr.idl")
+ */
+enum samr_ValidationStatus samdb_check_password(TALLOC_CTX *mem_ctx,
+ struct loadparm_context *lp_ctx,
+ const DATA_BLOB *password,
+ const uint32_t pwdProperties,
+ const uint32_t minPwdLength)
+{
+ char *utf8_password;
+ size_t utf8_password_len;
- note that this function doesn't actually store the result in the
- database, it just fills in the "mod" structure with ldb modify
- elements to setup the correct change when samdb_replace() is
- called. This allows the caller to combine the change with other
- changes (as is needed by some of the set user info levels)
+ /* checks if the "minPwdLength" property is satisfied */
+ if (minPwdLength > utf16_len_n(password->data, password->length) / 2)
+ return SAMR_VALIDATION_STATUS_PWD_TOO_SHORT;
- The caller should probably have a transaction wrapping this
-*/
+ /* Try to convert the password to UTF8 and perform other checks */
+ if (convert_string_talloc_convenience(mem_ctx,
+ lp_iconv_convenience(lp_ctx),
+ CH_UTF16MUNGED, CH_UTF8,
+ password->data, password->length,
+ (void **)&utf8_password,
+ &utf8_password_len, false)) {
+ /* checks the password complexity */
+ if (((pwdProperties & DOMAIN_PASSWORD_COMPLEX) != 0)
+ && (!check_password_quality(utf8_password)))
+ return SAMR_VALIDATION_STATUS_NOT_COMPLEX_ENOUGH;
+ }
+
+ return SAMR_VALIDATION_STATUS_SUCCESS;
+}
+
+/*
+ * Sets the user password using plaintext UTF16 (attribute "new_password") or
+ * LM (attribute "lmNewHash") or NT (attribute "ntNewHash") hash. Also pass
+ * as parameter if it's a user change or not ("userChange"). The "rejectReason"
+ * gives some more informations if the changed failed.
+ *
+ * The caller should have a LDB transaction wrapping this.
+ *
+ * Results: NT_STATUS_OK, NT_STATUS_INTERNAL_DB_CORRUPTION,
+ * NT_STATUS_INVALID_PARAMETER, NT_STATUS_UNSUCCESSFUL,
+ * NT_STATUS_PASSWORD_RESTRICTION
+ */
NTSTATUS samdb_set_password(struct ldb_context *ctx, TALLOC_CTX *mem_ctx,
struct ldb_dn *user_dn, struct ldb_dn *domain_dn,
struct ldb_message *mod,