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-rw-r--r--source4/dsdb/samdb/ldb_modules/password_hash.c588
1 files changed, 450 insertions, 138 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/password_hash.c b/source4/dsdb/samdb/ldb_modules/password_hash.c
index c7f6465e97..3433fdbe17 100644
--- a/source4/dsdb/samdb/ldb_modules/password_hash.c
+++ b/source4/dsdb/samdb/ldb_modules/password_hash.c
@@ -4,7 +4,7 @@
Copyright (C) Simo Sorce 2004-2008
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2006
Copyright (C) Andrew Tridgell 2004
- Copyright (C) Stefan Metzmacher 2007
+ Copyright (C) Stefan Metzmacher 2007-2010
Copyright (C) Matthias Dieter Wallnöfer 2009-2010
This program is free software; you can redistribute it and/or modify
@@ -82,6 +82,9 @@
* - Check for right connection encryption
*/
+/* Notice: Definition of "dsdb_control_password_change_status" moved into
+ * "samdb.h" */
+
struct ph_context {
struct ldb_module *module;
struct ldb_request *req;
@@ -91,24 +94,19 @@ struct ph_context {
struct ldb_reply *search_res;
- struct domain_data *domain;
-};
+ struct dsdb_control_password_change_status *status;
+
+ bool pwd_reset;
-struct domain_data {
- bool store_cleartext;
- uint32_t pwdProperties;
- uint32_t pwdHistoryLength;
- int64_t maxPwdAge;
- int64_t minPwdAge;
- uint32_t minPwdLength;
- const char *netbios_domain;
- const char *dns_domain;
- const char *realm;
+ bool change_status;
+ bool hash_values;
+ bool change_old_pw_checked;
};
+
struct setup_password_fields_io {
struct ph_context *ac;
- struct domain_data *domain;
+
struct smb_krb5_context *smb_krb5_context;
/* infos about the user account */
@@ -120,17 +118,18 @@ struct setup_password_fields_io {
bool is_computer;
} u;
- /* new credentials */
- struct {
+ /* new credentials and old given credentials */
+ struct setup_password_fields_given {
const struct ldb_val *cleartext_utf8;
const struct ldb_val *cleartext_utf16;
- struct ldb_val quoted_utf16;
struct samr_Password *nt_hash;
struct samr_Password *lm_hash;
- } n;
+ } n, og;
/* old credentials */
struct {
+ struct samr_Password *nt_hash;
+ struct samr_Password *lm_hash;
uint32_t nt_history_len;
struct samr_Password *nt_history;
uint32_t lm_history_len;
@@ -168,20 +167,21 @@ static int setup_nt_fields(struct setup_password_fields_io *io)
io->g.nt_hash = io->n.nt_hash;
ldb = ldb_module_get_ctx(io->ac->module);
- if (io->domain->pwdHistoryLength == 0) {
+ if (io->ac->status->domain_data.pwdHistoryLength == 0) {
return LDB_SUCCESS;
}
/* We might not have an old NT password */
io->g.nt_history = talloc_array(io->ac,
struct samr_Password,
- io->domain->pwdHistoryLength);
+ io->ac->status->domain_data.pwdHistoryLength);
if (!io->g.nt_history) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
- for (i = 0; i < MIN(io->domain->pwdHistoryLength-1, io->o.nt_history_len); i++) {
+ for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
+ io->o.nt_history_len); i++) {
io->g.nt_history[i+1] = io->o.nt_history[i];
}
io->g.nt_history_len = i + 1;
@@ -210,20 +210,21 @@ static int setup_lm_fields(struct setup_password_fields_io *io)
io->g.lm_hash = io->n.lm_hash;
ldb = ldb_module_get_ctx(io->ac->module);
- if (io->domain->pwdHistoryLength == 0) {
+ if (io->ac->status->domain_data.pwdHistoryLength == 0) {
return LDB_SUCCESS;
}
/* We might not have an old NT password */
io->g.lm_history = talloc_array(io->ac,
struct samr_Password,
- io->domain->pwdHistoryLength);
+ io->ac->status->domain_data.pwdHistoryLength);
if (!io->g.lm_history) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
- for (i = 0; i < MIN(io->domain->pwdHistoryLength-1, io->o.lm_history_len); i++) {
+ for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
+ io->o.lm_history_len); i++) {
io->g.lm_history[i+1] = io->o.lm_history[i];
}
io->g.lm_history_len = i + 1;
@@ -271,7 +272,8 @@ static int setup_kerberos_keys(struct setup_password_fields_io *io)
name[strlen(name)-1] = '\0';
}
- saltbody = talloc_asprintf(io->ac, "%s.%s", name, io->domain->dns_domain);
+ saltbody = talloc_asprintf(io->ac, "%s.%s", name,
+ io->ac->status->domain_data.dns_domain);
if (!saltbody) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
@@ -279,8 +281,8 @@ static int setup_kerberos_keys(struct setup_password_fields_io *io)
krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
&salt_principal,
- io->domain->realm, "host",
- saltbody, NULL);
+ io->ac->status->domain_data.realm,
+ "host", saltbody, NULL);
} else if (io->u.user_principal_name) {
char *user_principal_name;
char *p;
@@ -298,13 +300,13 @@ static int setup_kerberos_keys(struct setup_password_fields_io *io)
krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
&salt_principal,
- io->domain->realm, user_principal_name,
- NULL);
+ io->ac->status->domain_data.realm,
+ user_principal_name, NULL);
} else {
krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
&salt_principal,
- io->domain->realm, io->u.sAMAccountName,
- NULL);
+ io->ac->status->domain_data.realm,
+ io->u.sAMAccountName, NULL);
}
if (krb5_ret) {
ldb_asprintf_errstring(ldb,
@@ -331,7 +333,7 @@ static int setup_kerberos_keys(struct setup_password_fields_io *io)
}
/* create a talloc copy */
io->g.salt = talloc_strndup(io->ac,
- salt.saltvalue.data,
+ (char *)salt.saltvalue.data,
salt.saltvalue.length);
krb5_free_salt(io->smb_krb5_context->krb5_context, salt);
if (!io->g.salt) {
@@ -934,7 +936,7 @@ static int setup_primary_wdigest(struct setup_password_fields_io *io,
if (!user_principal_name) {
user_principal_name = talloc_asprintf(io->ac, "%s@%s",
io->u.sAMAccountName,
- io->domain->dns_domain);
+ io->ac->status->domain_data.dns_domain);
if (!user_principal_name) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
@@ -952,21 +954,23 @@ static int setup_primary_wdigest(struct setup_password_fields_io *io,
return LDB_ERR_OPERATIONS_ERROR;
}
- netbios_domain = data_blob_string_const(io->domain->netbios_domain);
- netbios_domain_l = data_blob_string_const(strlower_talloc(io->ac, io->domain->netbios_domain));
+ netbios_domain = data_blob_string_const(io->ac->status->domain_data.netbios_domain);
+ netbios_domain_l = data_blob_string_const(strlower_talloc(io->ac,
+ io->ac->status->domain_data.netbios_domain));
if (!netbios_domain_l.data) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
- netbios_domain_u = data_blob_string_const(strupper_talloc(io->ac, io->domain->netbios_domain));
+ netbios_domain_u = data_blob_string_const(strupper_talloc(io->ac,
+ io->ac->status->domain_data.netbios_domain));
if (!netbios_domain_u.data) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
- dns_domain = data_blob_string_const(io->domain->dns_domain);
- dns_domain_l = data_blob_string_const(io->domain->dns_domain);
- dns_domain_u = data_blob_string_const(io->domain->realm);
+ dns_domain = data_blob_string_const(io->ac->status->domain_data.dns_domain);
+ dns_domain_l = data_blob_string_const(io->ac->status->domain_data.dns_domain);
+ dns_domain_u = data_blob_string_const(io->ac->status->domain_data.realm);
digest = data_blob_string_const("Digest");
@@ -1087,7 +1091,7 @@ static int setup_supplemental_field(struct setup_password_fields_io *io)
/* Per MS-SAMR 3.1.1.8.11.6 we create AES keys if our domain functionality level is 2008 or higher */
do_newer_keys = (dsdb_functional_level(ldb) >= DS_DOMAIN_FUNCTION_2008);
- if (io->domain->store_cleartext &&
+ if (io->ac->status->domain_data.store_cleartext &&
(io->u.userAccountControl & UF_ENCRYPTED_TEXT_PASSWORD_ALLOWED)) {
do_cleartext = true;
}
@@ -1312,117 +1316,123 @@ static int setup_last_set_field(struct setup_password_fields_io *io)
return LDB_SUCCESS;
}
-static int setup_password_fields(struct setup_password_fields_io *io)
+static int setup_given_passwords(struct setup_password_fields_io *io,
+ struct setup_password_fields_given *g)
{
struct ldb_context *ldb;
bool ok;
- int ret;
- size_t converted_pw_len;
ldb = ldb_module_get_ctx(io->ac->module);
- /*
- * refuse the change if someone want to change the cleartext
- * and supply his own hashes at the same time...
- */
- if ((io->n.cleartext_utf8 || io->n.cleartext_utf16) && (io->n.nt_hash || io->n.lm_hash)) {
- ldb_asprintf_errstring(ldb,
- "setup_password_fields: "
- "it's only allowed to set the cleartext password or the password hashes");
- return LDB_ERR_UNWILLING_TO_PERFORM;
- }
-
- if (io->n.cleartext_utf8 && io->n.cleartext_utf16) {
- ldb_asprintf_errstring(ldb,
- "setup_password_fields: "
- "it's only allowed to set the cleartext password as userPassword or clearTextPasssword, not both at once");
- return LDB_ERR_UNWILLING_TO_PERFORM;
- }
-
- if (io->n.cleartext_utf8) {
+ if (g->cleartext_utf8) {
char **cleartext_utf16_str;
struct ldb_val *cleartext_utf16_blob;
- io->n.cleartext_utf16 = cleartext_utf16_blob = talloc(io->ac, struct ldb_val);
- if (!io->n.cleartext_utf16) {
+ size_t converted_pw_len;
+
+ cleartext_utf16_blob = talloc(io->ac, struct ldb_val);
+ if (!cleartext_utf16_blob) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
if (!convert_string_talloc_convenience(io->ac,
lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
CH_UTF8, CH_UTF16,
- io->n.cleartext_utf8->data,
- io->n.cleartext_utf8->length,
- (void **)&cleartext_utf16_str,
+ g->cleartext_utf8->data,
+ g->cleartext_utf8->length,
+ (void *)&cleartext_utf16_str,
&converted_pw_len, false)) {
ldb_asprintf_errstring(ldb,
- "setup_password_fields: "
- "failed to generate UTF16 password from cleartext UTF8 password");
+ "setup_password_fields: "
+ "failed to generate UTF16 password from cleartext UTF8 password");
return LDB_ERR_OPERATIONS_ERROR;
}
*cleartext_utf16_blob = data_blob_const(cleartext_utf16_str,
converted_pw_len);
- } else if (io->n.cleartext_utf16) {
+ g->cleartext_utf16 = cleartext_utf16_blob;
+ } else if (g->cleartext_utf16) {
char *cleartext_utf8_str;
struct ldb_val *cleartext_utf8_blob;
- io->n.cleartext_utf8 = cleartext_utf8_blob = talloc(io->ac, struct ldb_val);
- if (!io->n.cleartext_utf8) {
+ size_t converted_pw_len;
+
+ cleartext_utf8_blob = talloc(io->ac, struct ldb_val);
+ if (!cleartext_utf8_blob) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
if (!convert_string_talloc_convenience(io->ac,
lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
CH_UTF16MUNGED, CH_UTF8,
- io->n.cleartext_utf16->data,
- io->n.cleartext_utf16->length,
- (void **)&cleartext_utf8_str,
+ g->cleartext_utf16->data,
+ g->cleartext_utf16->length,
+ (void *)&cleartext_utf8_str,
&converted_pw_len, false)) {
/* We can't bail out entirely, as these unconvertable passwords are frustratingly valid */
- io->n.cleartext_utf8 = NULL;
talloc_free(cleartext_utf8_blob);
+ } else {
+ *cleartext_utf8_blob = data_blob_const(cleartext_utf8_str,
+ converted_pw_len);
+ g->cleartext_utf8 = cleartext_utf8_blob;
}
- *cleartext_utf8_blob = data_blob_const(cleartext_utf8_str,
- converted_pw_len);
}
- if (io->n.cleartext_utf16) {
+
+ if (g->cleartext_utf16) {
struct samr_Password *nt_hash;
+
nt_hash = talloc(io->ac, struct samr_Password);
if (!nt_hash) {
ldb_oom(ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
- io->n.nt_hash = nt_hash;
+ g->nt_hash = nt_hash;
/* compute the new nt hash */
- mdfour(nt_hash->hash, io->n.cleartext_utf16->data,
- io->n.cleartext_utf16->length);
+ mdfour(nt_hash->hash,
+ g->cleartext_utf16->data,
+ g->cleartext_utf16->length);
}
- if (io->n.cleartext_utf8) {
+ if (g->cleartext_utf8 &&
+ lp_lanman_auth(ldb_get_opaque(ldb, "loadparm"))) {
struct samr_Password *lm_hash;
- char *cleartext_unix;
- if (lp_lanman_auth(ldb_get_opaque(ldb, "loadparm")) &&
- convert_string_talloc_convenience(io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
- CH_UTF8, CH_UNIX,
- io->n.cleartext_utf8->data,
- io->n.cleartext_utf8->length,
- (void **)&cleartext_unix,
- &converted_pw_len, false)) {
- lm_hash = talloc(io->ac, struct samr_Password);
- if (!lm_hash) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
- }
-
- /* compute the new lm hash */
- ok = E_deshash((char *)cleartext_unix, lm_hash->hash);
- if (ok) {
- io->n.lm_hash = lm_hash;
- } else {
- talloc_free(lm_hash->hash);
- }
+
+ lm_hash = talloc(io->ac, struct samr_Password);
+ if (!lm_hash) {
+ ldb_oom(ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
}
+ /* compute the new lm hash */
+ ok = E_deshash((char *)g->cleartext_utf8->data, lm_hash->hash);
+ if (ok) {
+ g->lm_hash = lm_hash;
+ } else {
+ talloc_free(lm_hash);
+ }
+ }
+
+ return LDB_SUCCESS;
+}
+
+static int setup_password_fields(struct setup_password_fields_io *io)
+{
+ struct ldb_context *ldb;
+ int ret;
+
+ ldb = ldb_module_get_ctx(io->ac->module);
+
+ /* transform the old password (for password changes) */
+ ret = setup_given_passwords(io, &io->og);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ /* transform the new password */
+ ret = setup_given_passwords(io, &io->n);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
+ if (io->n.cleartext_utf8) {
ret = setup_kerberos_keys(io);
if (ret != LDB_SUCCESS) {
return ret;
@@ -1457,12 +1467,14 @@ static int setup_io(struct ph_context *ac,
const struct ldb_message *searched_msg,
struct setup_password_fields_io *io)
{
- const struct ldb_val *quoted_utf16;
+ const struct ldb_val *quoted_utf16, *old_quoted_utf16, *lm_hash, *old_lm_hash;
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
+ int ret;
ZERO_STRUCTP(io);
/* Some operations below require kerberos contexts */
+
if (smb_krb5_init_context(ac,
ldb_get_event_context(ldb),
(struct loadparm_context *)ldb_get_opaque(ldb, "loadparm"),
@@ -1471,7 +1483,6 @@ static int setup_io(struct ph_context *ac,
}
io->ac = ac;
- io->domain = ac->domain;
io->u.userAccountControl = samdb_result_uint(searched_msg, "userAccountControl", 0);
io->u.pwdLastSet = samdb_result_nttime(searched_msg, "pwdLastSet", 0);
@@ -1487,8 +1498,23 @@ static int setup_io(struct ph_context *ac,
return LDB_ERR_CONSTRAINT_VIOLATION;
}
- io->n.cleartext_utf8 = ldb_msg_find_ldb_val(orig_msg, "userPassword");
- io->n.cleartext_utf16 = ldb_msg_find_ldb_val(orig_msg, "clearTextPassword");
+ ret = samdb_msg_find_old_and_new_ldb_val(orig_msg, "userPassword",
+ &io->n.cleartext_utf8, &io->og.cleartext_utf8);
+ if (ret != LDB_SUCCESS) {
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to set the old password once!");
+ return ret;
+ }
+
+ ret = samdb_msg_find_old_and_new_ldb_val(orig_msg, "clearTextPassword",
+ &io->n.cleartext_utf16, &io->og.cleartext_utf16);
+ if (ret != LDB_SUCCESS) {
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to set the old password once!");
+ return ret;
+ }
/* this rather strange looking piece of code is there to
handle a ldap client setting a password remotely using the
@@ -1502,22 +1528,220 @@ static int setup_io(struct ph_context *ac,
to create a MD4 hash which starts and ends in 0x22 0x00, as
that would then be treated as a UTF16 password rather than
a nthash */
- quoted_utf16 = ldb_msg_find_ldb_val(orig_msg, "unicodePwd");
+
+ ret = samdb_msg_find_old_and_new_ldb_val(orig_msg, "unicodePwd",
+ &quoted_utf16, &old_quoted_utf16);
+ if (ret != LDB_SUCCESS) {
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to set the old password once!");
+ return ret;
+ }
+
+ /* Checks and converts the actual "unicodePwd" attribute */
if (quoted_utf16 &&
quoted_utf16->length >= 4 &&
quoted_utf16->data[0] == '"' &&
quoted_utf16->data[1] == 0 &&
quoted_utf16->data[quoted_utf16->length-2] == '"' &&
quoted_utf16->data[quoted_utf16->length-1] == 0) {
- io->n.quoted_utf16.data = talloc_memdup(io->ac, quoted_utf16->data+2, quoted_utf16->length-4);
- io->n.quoted_utf16.length = quoted_utf16->length-4;
- io->n.cleartext_utf16 = &io->n.quoted_utf16;
+ struct ldb_val *quoted_utf16_2;
+
+ if (io->n.cleartext_utf16) {
+ /* refuse the change if someone wants to change with
+ with both UTF16 possibilities at the same time... */
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+
+ /*
+ * adapt the quoted UTF16 string to be a real
+ * cleartext one
+ */
+ quoted_utf16_2 = talloc(io->ac, struct ldb_val);
+ if (quoted_utf16_2 == NULL) {
+ ldb_oom(ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ quoted_utf16_2->data = quoted_utf16->data + 2;
+ quoted_utf16_2->length = quoted_utf16->length-4;
+ io->n.cleartext_utf16 = quoted_utf16_2;
io->n.nt_hash = NULL;
+
+ } else {
+ /* We have only the hash available -> so no plaintext here */
+ if (!ac->hash_values) {
+ /* refuse the change if someone wants to change
+ the hash without control specified... */
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's not allowed to set the NT hash password directly'");
+ /* this looks odd but this is what Windows does:
+ returns "UNWILLING_TO_PERFORM" on wrong
+ password sets and "CONSTRAINT_VIOLATION" on
+ wrong password changes. */
+ if (old_quoted_utf16 == NULL) {
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ }
+
+ io->n.nt_hash = talloc(io->ac, struct samr_Password);
+ memcpy(io->n.nt_hash->hash, quoted_utf16->data,
+ MIN(quoted_utf16->length, sizeof(io->n.nt_hash->hash)));
+ }
+
+ /* Checks and converts the previous "unicodePwd" attribute */
+ if (old_quoted_utf16 &&
+ old_quoted_utf16->length >= 4 &&
+ old_quoted_utf16->data[0] == '"' &&
+ old_quoted_utf16->data[1] == 0 &&
+ old_quoted_utf16->data[old_quoted_utf16->length-2] == '"' &&
+ old_quoted_utf16->data[old_quoted_utf16->length-1] == 0) {
+ struct ldb_val *old_quoted_utf16_2;
+
+ if (io->og.cleartext_utf16) {
+ /* refuse the change if someone wants to change with
+ both UTF16 possibilities at the same time... */
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to set the cleartext password as 'unicodePwd' or as 'clearTextPassword'");
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+
+ /*
+ * adapt the quoted UTF16 string to be a real
+ * cleartext one
+ */
+ old_quoted_utf16_2 = talloc(io->ac, struct ldb_val);
+ if (old_quoted_utf16_2 == NULL) {
+ ldb_oom(ldb);
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
+ old_quoted_utf16_2->data = old_quoted_utf16->data + 2;
+ old_quoted_utf16_2->length = old_quoted_utf16->length-4;
+
+ io->og.cleartext_utf16 = old_quoted_utf16_2;
+ io->og.nt_hash = NULL;
} else {
- io->n.nt_hash = samdb_result_hash(io->ac, orig_msg, "unicodePwd");
+ /* We have only the hash available -> so no plaintext here */
+ if (!ac->hash_values) {
+ /* refuse the change if someone wants to change
+ the hash without control specified... */
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's not allowed to set the NT hash password directly'");
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+
+ io->og.nt_hash = talloc(io->ac, struct samr_Password);
+ memcpy(io->og.nt_hash->hash, old_quoted_utf16->data,
+ MIN(old_quoted_utf16->length, sizeof(io->og.nt_hash->hash)));
+ }
+
+ /* Handles the "dBCSPwd" attribute (LM hash) */
+ io->n.lm_hash = NULL; io->og.lm_hash = NULL;
+ ret = samdb_msg_find_old_and_new_ldb_val(orig_msg, "dBCSPwd",
+ &lm_hash, &old_lm_hash);
+ if (ret != LDB_SUCCESS) {
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to set the old password once!");
+ return ret;
+ }
+
+ if (((lm_hash != NULL) || (old_lm_hash != NULL)) && (!ac->hash_values)) {
+ /* refuse the change if someone wants to change the hash
+ without control specified... */
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's not allowed to set the LM hash password directly'");
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+ if (lm_hash != NULL) {
+ io->n.lm_hash = talloc(io->ac, struct samr_Password);
+ memcpy(io->n.lm_hash->hash, lm_hash->data, MIN(lm_hash->length,
+ sizeof(io->n.lm_hash->hash)));
+ }
+
+ if (old_lm_hash != NULL) {
+ io->og.lm_hash = talloc(io->ac, struct samr_Password);
+ memcpy(io->og.lm_hash->hash, old_lm_hash->data, MIN(old_lm_hash->length,
+ sizeof(io->og.lm_hash->hash)));
+ }
+
+ /* refuse the change if someone wants to change the clear-
+ text and supply his own hashes at the same time... */
+ if ((io->n.cleartext_utf8 || io->n.cleartext_utf16)
+ && (io->n.nt_hash || io->n.lm_hash)) {
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to set the password in form of cleartext attributes or as hashes");
+ return LDB_ERR_UNWILLING_TO_PERFORM;
}
- io->n.lm_hash = samdb_result_hash(io->ac, orig_msg, "dBCSPwd");
+ /* refuse the change if someone wants to change the password
+ using both plaintext methods (UTF8 and UTF16) at the same time... */
+ if (io->n.cleartext_utf8 && io->n.cleartext_utf16) {
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to set the cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+
+ /* refuse the change if someone wants to compare against a plaintext
+ or hash at the same time for a "password modify" operation... */
+ if ((io->og.cleartext_utf8 || io->og.cleartext_utf16)
+ && (io->og.nt_hash || io->og.lm_hash)) {
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to provide the old password in form of cleartext attributes or as hashes");
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+
+ /* refuse the change if someone wants to compare against both
+ * plaintexts at the same time for a "password modify" operation... */
+ if (io->og.cleartext_utf8 && io->og.cleartext_utf16) {
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to provide the old cleartext password as 'unicodePwd' or as 'userPassword' or as 'clearTextPassword'");
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+
+ /* refuse the change if someone wants to compare against both
+ * hashes at the same time for a "password modify" operation... */
+ if (io->og.nt_hash && io->og.lm_hash) {
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "it's only allowed to provide the old password in hash format as 'unicodePwd' or as 'dBCSPwd'");
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+
+ /* Decides if we have a password modify or password reset operation */
+ if (ac->req->operation == LDB_ADD) {
+ /* On "add" we have only "password reset" */
+ ac->pwd_reset = true;
+ } else if (ac->req->operation == LDB_MODIFY) {
+ if (io->og.cleartext_utf8 || io->og.cleartext_utf16
+ || io->og.nt_hash || io->og.lm_hash
+ || ac->change_old_pw_checked) {
+ /* If we have an old password or the "change old
+ * password checked" control specified then for sure it
+ * is a user "password change" */
+ ac->pwd_reset = false;
+ } else {
+ /* Otherwise we have also here a "password reset" */
+ ac->pwd_reset = true;
+ }
+ } else {
+ /* this shouldn't happen */
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
return LDB_SUCCESS;
}
@@ -1542,6 +1766,42 @@ static struct ph_context *ph_init_context(struct ldb_module *module,
return ac;
}
+static void ph_apply_controls(struct ph_context *ac)
+{
+ struct ldb_control *ctrl;
+
+ ac->change_status = false;
+ ctrl = ldb_request_get_control(ac->req,
+ DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID);
+ if (ctrl != NULL) {
+ ac->change_status = true;
+
+ /* Mark the "change status" control as uncritical (done) */
+ ctrl->critical = false;
+ }
+
+ ac->hash_values = false;
+ ctrl = ldb_request_get_control(ac->req,
+ DSDB_CONTROL_PASSWORD_HASH_VALUES_OID);
+ if (ctrl != NULL) {
+ ac->hash_values = true;
+
+ /* Mark the "hash values" control as uncritical (done) */
+ ctrl->critical = false;
+ }
+
+ ac->change_old_pw_checked = false;
+ ctrl = ldb_request_get_control(ac->req,
+ DSDB_CONTROL_PASSWORD_CHANGE_OLD_PW_CHECKED_OID);
+ if (ctrl != NULL) {
+ ac->change_old_pw_checked = true;
+
+ /* Mark the "change old password checked" control as uncritical
+ * (done) */
+ ctrl->critical = false;
+ }
+}
+
static int ph_op_callback(struct ldb_request *req, struct ldb_reply *ares)
{
struct ph_context *ac;
@@ -1557,6 +1817,15 @@ static int ph_op_callback(struct ldb_request *req, struct ldb_reply *ares)
return ldb_module_send_referral(ac->req, ares->referral);
}
+ if ((ares->error != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
+ /* On success and trivial errors a status control is being
+ * added (used for example by the "samdb_set_password" call) */
+ ldb_reply_add_control(ares,
+ DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
+ false,
+ ac->status);
+ }
+
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
@@ -1582,7 +1851,6 @@ static int get_domain_data_callback(struct ldb_request *req,
struct ldb_reply *ares)
{
struct ldb_context *ldb;
- struct domain_data *data;
struct ph_context *ac;
struct loadparm_context *lp_ctx;
int ret;
@@ -1601,7 +1869,7 @@ static int get_domain_data_callback(struct ldb_request *req,
switch (ares->type) {
case LDB_REPLY_ENTRY:
- if (ac->domain != NULL) {
+ if (ac->status != NULL) {
talloc_free(ares);
ldb_set_errstring(ldb, "Too many results");
@@ -1609,8 +1877,10 @@ static int get_domain_data_callback(struct ldb_request *req,
goto done;
}
- data = talloc_zero(ac, struct domain_data);
- if (data == NULL) {
+ /* Setup the "status" structure (used as control later) */
+ ac->status = talloc_zero(ac->req,
+ struct dsdb_control_password_change_status);
+ if (ac->status == NULL) {
talloc_free(ares);
ldb_oom(ldb);
@@ -1618,13 +1888,14 @@ static int get_domain_data_callback(struct ldb_request *req,
goto done;
}
- data->pwdProperties = samdb_result_uint(ares->message, "pwdProperties", -1);
- data->pwdHistoryLength = samdb_result_uint(ares->message, "pwdHistoryLength", -1);
- data->maxPwdAge = samdb_result_int64(ares->message, "maxPwdAge", -1);
- data->minPwdAge = samdb_result_int64(ares->message, "minPwdAge", -1);
- data->minPwdLength = samdb_result_uint(ares->message, "minPwdLength", -1);
- data->store_cleartext =
- data->pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
+ /* Setup the "domain data" structure */
+ ac->status->domain_data.pwdProperties = samdb_result_uint(ares->message, "pwdProperties", -1);
+ ac->status->domain_data.pwdHistoryLength = samdb_result_uint(ares->message, "pwdHistoryLength", -1);
+ ac->status->domain_data.maxPwdAge = samdb_result_int64(ares->message, "maxPwdAge", -1);
+ ac->status->domain_data.minPwdAge = samdb_result_int64(ares->message, "minPwdAge", -1);
+ ac->status->domain_data.minPwdLength = samdb_result_uint(ares->message, "minPwdLength", -1);
+ ac->status->domain_data.store_cleartext =
+ ac->status->domain_data.pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
talloc_free(ares);
@@ -1636,11 +1907,11 @@ static int get_domain_data_callback(struct ldb_request *req,
lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
struct loadparm_context);
- data->dns_domain = lp_dnsdomain(lp_ctx);
- data->realm = lp_realm(lp_ctx);
- data->netbios_domain = lp_sam_name(lp_ctx);
+ ac->status->domain_data.dns_domain = lp_dnsdomain(lp_ctx);
+ ac->status->domain_data.realm = lp_realm(lp_ctx);
+ ac->status->domain_data.netbios_domain = lp_sam_name(lp_ctx);
- ac->domain = data;
+ ac->status->reject_reason = SAM_PWD_CHANGE_NO_ERROR;
ret = LDB_SUCCESS;
break;
@@ -1668,12 +1939,31 @@ static int get_domain_data_callback(struct ldb_request *req,
break;
}
break;
-
}
done:
if (ret != LDB_SUCCESS) {
- return ldb_module_done(ac->req, NULL, NULL, ret);
+ struct ldb_reply *new_ares;
+
+ new_ares = talloc_zero(ac->req, struct ldb_reply);
+ if (new_ares == NULL) {
+ ldb_oom(ldb);
+ return ldb_module_done(ac->req, NULL, NULL,
+ LDB_ERR_OPERATIONS_ERROR);
+ }
+
+ new_ares->error = ret;
+ if ((ret != LDB_ERR_OPERATIONS_ERROR) && (ac->change_status)) {
+ /* On success and trivial errors a status control is being
+ * added (used for example by the "samdb_set_password" call) */
+ ldb_reply_add_control(new_ares,
+ DSDB_CONTROL_PASSWORD_CHANGE_STATUS_OID,
+ false,
+ ac->status);
+ }
+
+ return ldb_module_done(ac->req, new_ares->controls,
+ new_ares->response, new_ares->error);
}
return LDB_SUCCESS;
@@ -1768,6 +2058,7 @@ static int password_hash_add(struct ldb_module *module, struct ldb_request *req)
DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
return LDB_ERR_OPERATIONS_ERROR;
}
+ ph_apply_controls(ac);
/* get user domain data */
ret = build_domain_data_request(ac);
@@ -1797,11 +2088,22 @@ static int password_hash_add_do_add(struct ph_context *ac)
return LDB_ERR_OPERATIONS_ERROR;
}
- /* remove attributes that we just read into 'io' */
- ldb_msg_remove_attr(msg, "userPassword");
- ldb_msg_remove_attr(msg, "clearTextPassword");
- ldb_msg_remove_attr(msg, "unicodePwd");
- ldb_msg_remove_attr(msg, "dBCSPwd");
+ /* remove attributes that we just read into 'io' (handle also superfluous
+ * "password modify" trials - multiple attributes with the same name -
+ * on add operations) */
+ while (ldb_msg_find_element(msg, "userPassword") != NULL) {
+ ldb_msg_remove_attr(msg, "userPassword");
+ }
+ while (ldb_msg_find_element(msg, "clearTextPassword") != NULL) {
+ ldb_msg_remove_attr(msg, "clearTextPassword");
+ }
+ while (ldb_msg_find_element(msg, "unicodePwd") != NULL) {
+ ldb_msg_remove_attr(msg, "unicodePwd");
+ }
+ while (ldb_msg_find_element(msg, "dBCSPwd") != NULL) {
+ ldb_msg_remove_attr(msg, "dBCSPwd");
+ }
+
ldb_msg_remove_attr(msg, "pwdLastSet");
ldb = ldb_module_get_ctx(ac->module);
@@ -1925,6 +2227,7 @@ static int password_hash_modify(struct ldb_module *module, struct ldb_request *r
DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
return LDB_ERR_OPERATIONS_ERROR;
}
+ ph_apply_controls(ac);
/* use a new message structure so that we can modify it */
msg = ldb_msg_copy_shallow(ac, req->op.mod.message);
@@ -2165,6 +2468,7 @@ static int password_hash_mod_do_mod(struct ph_context *ac)
const struct ldb_message *orig_msg, *searched_msg;
struct setup_password_fields_io io;
int ret;
+ NTSTATUS status;
ldb = ldb_module_get_ctx(ac->module);
@@ -2186,7 +2490,15 @@ static int password_hash_mod_do_mod(struct ph_context *ac)
return ret;
}
- /* Fill in some final details (only relevent once the password has been set) */
+ /* Get the old password from the database */
+ status = samdb_result_passwords(io.ac,
+ ldb_get_opaque(ldb, "loadparm"),
+ searched_msg,
+ &io.o.lm_hash, &io.o.nt_hash);
+ if (!NT_STATUS_IS_OK(status)) {
+ return LDB_ERR_OPERATIONS_ERROR;
+ }
+
io.o.nt_history_len = samdb_result_hashes(io.ac, searched_msg, "ntPwdHistory", &io.o.nt_history);
io.o.lm_history_len = samdb_result_hashes(io.ac, searched_msg, "lmPwdHistory", &io.o.lm_history);
io.o.supplemental = ldb_msg_find_ldb_val(searched_msg, "supplementalCredentials");
generated by cgit (git 2.34.1) at 2024-11-18 14:06:58 +0000