*/
#include "includes.h"
-#include "libcli/ldap/ldap_ndr.h"
#include "ldb_module.h"
-#include "librpc/gen_ndr/misc.h"
-#include "librpc/gen_ndr/samr.h"
#include "libcli/auth/libcli_auth.h"
-#include "libcli/security/security.h"
#include "system/kerberos.h"
#include "auth/kerberos/kerberos.h"
-#include "system/time.h"
#include "dsdb/samdb/samdb.h"
-#include "../libds/common/flags.h"
+#include "dsdb/samdb/ldb_modules/util.h"
#include "dsdb/samdb/ldb_modules/password_modules.h"
-#include "librpc/ndr/libndr.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#include "../lib/crypto/crypto.h"
#include "param/param.h"
struct ldb_reply *search_res;
struct dsdb_control_password_change_status *status;
+ struct dsdb_control_password_change *change;
bool pwd_reset;
-
bool change_status;
bool hash_values;
- bool change_old_pw_checked;
+ bool userPassword;
};
const char *sAMAccountName;
const char *user_principal_name;
bool is_computer;
+ uint32_t restrictions;
} u;
/* new credentials and old given credentials */
} g;
};
+static int password_hash_bypass(struct ldb_module *module, struct ldb_request *request)
+{
+ struct ldb_context *ldb = ldb_module_get_ctx(module);
+ const struct ldb_message *msg;
+ struct ldb_message_element *nte;
+ struct ldb_message_element *lme;
+ struct ldb_message_element *nthe;
+ struct ldb_message_element *lmhe;
+ struct ldb_message_element *sce;
+
+ switch (request->operation) {
+ case LDB_ADD:
+ msg = request->op.add.message;
+ break;
+ case LDB_MODIFY:
+ msg = request->op.mod.message;
+ break;
+ default:
+ return ldb_next_request(module, request);
+ }
+
+ /* nobody must touch password histories and 'supplementalCredentials' */
+ nte = dsdb_get_single_valued_attr(msg, "unicodePwd",
+ request->operation);
+ lme = dsdb_get_single_valued_attr(msg, "dBCSPwd",
+ request->operation);
+ nthe = dsdb_get_single_valued_attr(msg, "ntPwdHistory",
+ request->operation);
+ lmhe = dsdb_get_single_valued_attr(msg, "lmPwdHistory",
+ request->operation);
+ sce = dsdb_get_single_valued_attr(msg, "supplementalCredentials",
+ request->operation);
+
+#define CHECK_HASH_ELEMENT(e, min, max) do {\
+ if (e && e->num_values) { \
+ unsigned int _count; \
+ if (e->num_values != 1) { \
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
+ "num_values != 1"); \
+ } \
+ if ((e->values[0].length % 16) != 0) { \
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
+ "length % 16 != 0"); \
+ } \
+ _count = e->values[0].length / 16; \
+ if (_count < min) { \
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
+ "count < min"); \
+ } \
+ if (_count > max) { \
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION, \
+ "count > max"); \
+ } \
+ } \
+} while (0)
+
+ CHECK_HASH_ELEMENT(nte, 1, 1);
+ CHECK_HASH_ELEMENT(lme, 1, 1);
+ CHECK_HASH_ELEMENT(nthe, 1, INT32_MAX);
+ CHECK_HASH_ELEMENT(lmhe, 1, INT32_MAX);
+
+ if (sce && sce->num_values) {
+ enum ndr_err_code ndr_err;
+ struct supplementalCredentialsBlob *scb;
+ struct supplementalCredentialsPackage *scpp = NULL;
+ struct supplementalCredentialsPackage *scpk = NULL;
+ struct supplementalCredentialsPackage *scpkn = NULL;
+ struct supplementalCredentialsPackage *scpct = NULL;
+ DATA_BLOB scpbp = data_blob_null;
+ DATA_BLOB scpbk = data_blob_null;
+ DATA_BLOB scpbkn = data_blob_null;
+ DATA_BLOB scpbct = data_blob_null;
+ DATA_BLOB blob;
+ uint32_t i;
+
+ if (sce->num_values != 1) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "num_values != 1");
+ }
+
+ scb = talloc_zero(request, struct supplementalCredentialsBlob);
+ if (!scb) {
+ return ldb_module_oom(module);
+ }
+
+ ndr_err = ndr_pull_struct_blob_all(&sce->values[0], scb, scb,
+ (ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "ndr_pull_struct_blob_all");
+ }
+
+ if (scb->sub.num_packages < 2) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "num_packages < 2");
+ }
+
+ for (i=0; i < scb->sub.num_packages; i++) {
+ DATA_BLOB subblob;
+
+ subblob = strhex_to_data_blob(scb, scb->sub.packages[i].data);
+ if (subblob.data == NULL) {
+ return ldb_module_oom(module);
+ }
+
+ if (strcmp(scb->sub.packages[i].name, "Packages") == 0) {
+ if (scpp) {
+ return ldb_error(ldb,
+ LDB_ERR_CONSTRAINT_VIOLATION,
+ "Packages twice");
+ }
+ scpp = &scb->sub.packages[i];
+ scpbp = subblob;
+ continue;
+ }
+ if (strcmp(scb->sub.packages[i].name, "Primary:Kerberos") == 0) {
+ if (scpk) {
+ return ldb_error(ldb,
+ LDB_ERR_CONSTRAINT_VIOLATION,
+ "Primary:Kerberos twice");
+ }
+ scpk = &scb->sub.packages[i];
+ scpbk = subblob;
+ continue;
+ }
+ if (strcmp(scb->sub.packages[i].name, "Primary:Kerberos-Newer-Keys") == 0) {
+ if (scpkn) {
+ return ldb_error(ldb,
+ LDB_ERR_CONSTRAINT_VIOLATION,
+ "Primary:Kerberos-Newer-Keys twice");
+ }
+ scpkn = &scb->sub.packages[i];
+ scpbkn = subblob;
+ continue;
+ }
+ if (strcmp(scb->sub.packages[i].name, "Primary:CLEARTEXT") == 0) {
+ if (scpct) {
+ return ldb_error(ldb,
+ LDB_ERR_CONSTRAINT_VIOLATION,
+ "Primary:CLEARTEXT twice");
+ }
+ scpct = &scb->sub.packages[i];
+ scpbct = subblob;
+ continue;
+ }
+
+ data_blob_free(&subblob);
+ }
+
+ if (scpp) {
+ struct package_PackagesBlob *p;
+ uint32_t n;
+
+ p = talloc_zero(scb, struct package_PackagesBlob);
+ if (p == NULL) {
+ return ldb_module_oom(module);
+ }
+
+ ndr_err = ndr_pull_struct_blob(&scpbp, p, p,
+ (ndr_pull_flags_fn_t)ndr_pull_package_PackagesBlob);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "ndr_pull_struct_blob Packages");
+ }
+
+ if (p->names == NULL) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "Packages names == NULL");
+ }
+
+ for (n = 0; p->names[n]; n++) {
+ /* noop */
+ }
+
+ if (scb->sub.num_packages != (n + 1)) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "Packages num_packages != num_names + 1");
+ }
+
+ talloc_free(p);
+ }
+
+ if (scpk) {
+ struct package_PrimaryKerberosBlob *k;
+
+ k = talloc_zero(scb, struct package_PrimaryKerberosBlob);
+ if (k == NULL) {
+ return ldb_module_oom(module);
+ }
+
+ ndr_err = ndr_pull_struct_blob(&scpbk, k, k,
+ (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "ndr_pull_struct_blob PrimaryKerberos");
+ }
+
+ if (k->version != 3) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryKerberos version != 3");
+ }
+
+ if (k->ctr.ctr3.salt.string == NULL) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryKerberos salt == NULL");
+ }
+
+ if (strlen(k->ctr.ctr3.salt.string) == 0) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryKerberos strlen(salt) == 0");
+ }
+
+ if (k->ctr.ctr3.num_keys != 2) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryKerberos num_keys != 2");
+ }
+
+ if (k->ctr.ctr3.num_old_keys > k->ctr.ctr3.num_keys) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryKerberos num_old_keys > num_keys");
+ }
+
+ if (k->ctr.ctr3.keys[0].keytype != ENCTYPE_DES_CBC_MD5) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryKerberos key[0] != DES_CBC_MD5");
+ }
+ if (k->ctr.ctr3.keys[1].keytype != ENCTYPE_DES_CBC_CRC) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryKerberos key[1] != DES_CBC_CRC");
+ }
+
+ if (k->ctr.ctr3.keys[0].value_len != 8) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryKerberos key[0] value_len != 8");
+ }
+ if (k->ctr.ctr3.keys[1].value_len != 8) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryKerberos key[1] value_len != 8");
+ }
+
+ for (i = 0; i < k->ctr.ctr3.num_old_keys; i++) {
+ if (k->ctr.ctr3.old_keys[i].keytype ==
+ k->ctr.ctr3.keys[i].keytype &&
+ k->ctr.ctr3.old_keys[i].value_len ==
+ k->ctr.ctr3.keys[i].value_len) {
+ continue;
+ }
+
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryKerberos old_keys type/value_len doesn't match");
+ }
+
+ talloc_free(k);
+ }
+
+ if (scpkn) {
+ struct package_PrimaryKerberosBlob *k;
+
+ k = talloc_zero(scb, struct package_PrimaryKerberosBlob);
+ if (k == NULL) {
+ return ldb_module_oom(module);
+ }
+
+ ndr_err = ndr_pull_struct_blob(&scpbkn, k, k,
+ (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "ndr_pull_struct_blob PrimaryKerberosNeverKeys");
+ }
+
+ if (k->version != 4) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNerverKeys version != 4");
+ }
+
+ if (k->ctr.ctr4.salt.string == NULL) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys salt == NULL");
+ }
+
+ if (strlen(k->ctr.ctr4.salt.string) == 0) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys strlen(salt) == 0");
+ }
+
+ if (k->ctr.ctr4.num_keys != 4) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys num_keys != 2");
+ }
+
+ if (k->ctr.ctr4.num_old_keys > k->ctr.ctr4.num_keys) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys num_old_keys > num_keys");
+ }
+
+ if (k->ctr.ctr4.num_older_keys > k->ctr.ctr4.num_old_keys) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys num_older_keys > num_old_keys");
+ }
+
+ if (k->ctr.ctr4.keys[0].keytype != ENCTYPE_AES256_CTS_HMAC_SHA1_96) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys key[0] != AES256");
+ }
+ if (k->ctr.ctr4.keys[1].keytype != ENCTYPE_AES128_CTS_HMAC_SHA1_96) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys key[1] != AES128");
+ }
+ if (k->ctr.ctr4.keys[2].keytype != ENCTYPE_DES_CBC_MD5) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys key[2] != DES_CBC_MD5");
+ }
+ if (k->ctr.ctr4.keys[3].keytype != ENCTYPE_DES_CBC_CRC) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys key[3] != DES_CBC_CRC");
+ }
+
+ if (k->ctr.ctr4.keys[0].value_len != 32) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys key[0] value_len != 32");
+ }
+ if (k->ctr.ctr4.keys[1].value_len != 16) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys key[1] value_len != 16");
+ }
+ if (k->ctr.ctr4.keys[2].value_len != 8) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys key[2] value_len != 8");
+ }
+ if (k->ctr.ctr4.keys[3].value_len != 8) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "KerberosNewerKeys key[3] value_len != 8");
+ }
+
+ /*
+ * TODO:
+ * Maybe we can check old and older keys here.
+ * But we need to do some tests, if the old keys
+ * can be taken from the PrimaryKerberos blob
+ * (with only des keys), when the domain was upgraded
+ * from w2k3 to w2k8.
+ */
+
+ talloc_free(k);
+ }
+
+ if (scpct) {
+ struct package_PrimaryCLEARTEXTBlob *ct;
+
+ ct = talloc_zero(scb, struct package_PrimaryCLEARTEXTBlob);
+ if (ct == NULL) {
+ return ldb_module_oom(module);
+ }
+
+ ndr_err = ndr_pull_struct_blob(&scpbct, ct, ct,
+ (ndr_pull_flags_fn_t)ndr_pull_package_PrimaryCLEARTEXTBlob);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "ndr_pull_struct_blob PrimaryCLEARTEXT");
+ }
+
+ if ((ct->cleartext.length % 2) != 0) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "PrimaryCLEARTEXT length % 2 != 0");
+ }
+
+ talloc_free(ct);
+ }
+
+ ndr_err = ndr_push_struct_blob(&blob, scb, scb,
+ (ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "ndr_pull_struct_blob_all");
+ }
+
+ if (sce->values[0].length != blob.length) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "supplementalCredentialsBlob length differ");
+ }
+
+ if (memcmp(sce->values[0].data, blob.data, blob.length) != 0) {
+ return ldb_error(ldb, LDB_ERR_CONSTRAINT_VIOLATION,
+ "supplementalCredentialsBlob memcmp differ");
+ }
+
+ talloc_free(scb);
+ }
+
+ ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_bypass - validated\n");
+ return ldb_next_request(module, request);
+}
+
/* Get the NT hash, and fill it in as an entry in the password history,
and specify it into io->g.nt_hash */
struct samr_Password,
io->ac->status->domain_data.pwdHistoryLength);
if (!io->g.nt_history) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
return LDB_SUCCESS;
}
- /* We might not have an old NT password */
+ /* We might not have an old LM password */
io->g.lm_history = talloc_array(io->ac,
struct samr_Password,
io->ac->status->domain_data.pwdHistoryLength);
if (!io->g.lm_history) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
for (i = 0; i < MIN(io->ac->status->domain_data.pwdHistoryLength-1,
name = strlower_talloc(io->ac, io->u.sAMAccountName);
if (!name) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
if (name[strlen(name)-1] == '$') {
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;
+ return ldb_oom(ldb);
}
krb5_ret = krb5_make_principal(io->smb_krb5_context->krb5_context,
user_principal_name = talloc_strdup(io->ac, io->u.user_principal_name);
if (!user_principal_name) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
p = strchr(user_principal_name, '@');
salt.saltvalue.length);
krb5_free_salt(io->smb_krb5_context->krb5_context, salt);
if (!io->g.salt) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
salt.saltvalue.data = discard_const(io->g.salt);
salt.saltvalue.length = strlen(io->g.salt);
key.keyvalue.length);
krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
if (!io->g.aes_256.data) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
/*
key.keyvalue.length);
krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
if (!io->g.aes_128.data) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
/*
key.keyvalue.length);
krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
if (!io->g.des_md5.data) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
/*
key.keyvalue.length);
krb5_free_keyblock_contents(io->smb_krb5_context->krb5_context, &key);
if (!io->g.des_crc.data) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
return LDB_SUCCESS;
struct package_PrimaryKerberosKey3,
pkb3->num_keys);
if (!pkb3->keys) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
pkb3->keys[0].keytype = ENCTYPE_DES_CBC_MD5;
blob = strhex_to_data_blob(io->ac, old_scp->data);
if (!blob.data) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
/* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
- ndr_err = ndr_pull_struct_blob(&blob, io->ac, lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")), &_old_pkb,
+ ndr_err = ndr_pull_struct_blob(&blob, io->ac, &_old_pkb,
(ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
struct package_PrimaryKerberosKey4,
pkb4->num_keys);
if (!pkb4->keys) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
pkb4->keys[0].iteration_count = 4096;
blob = strhex_to_data_blob(io->ac, old_scp->data);
if (!blob.data) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
/* TODO: use ndr_pull_struct_blob_all(), when the ndr layer handles it correct with relative pointers */
ndr_err = ndr_pull_struct_blob(&blob, io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
&_old_pkb,
(ndr_pull_flags_fn_t)ndr_pull_package_PrimaryKerberosBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
sAMAccountName = data_blob_string_const(io->u.sAMAccountName);
sAMAccountName_l = data_blob_string_const(strlower_talloc(io->ac, io->u.sAMAccountName));
if (!sAMAccountName_l.data) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
sAMAccountName_u = data_blob_string_const(strupper_talloc(io->ac, io->u.sAMAccountName));
if (!sAMAccountName_u.data) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
/* if the user doesn't have a userPrincipalName, create one (with lower case realm) */
io->u.sAMAccountName,
io->ac->status->domain_data.dns_domain);
if (!user_principal_name) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
}
userPrincipalName = data_blob_string_const(user_principal_name);
userPrincipalName_l = data_blob_string_const(strlower_talloc(io->ac, user_principal_name));
if (!userPrincipalName_l.data) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
userPrincipalName_u = data_blob_string_const(strupper_talloc(io->ac, user_principal_name));
if (!userPrincipalName_u.data) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
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;
+ return ldb_oom(ldb);
}
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;
+ return ldb_oom(ldb);
}
dns_domain = data_blob_string_const(io->ac->status->domain_data.dns_domain);
pdb->hashes = talloc_array(io->ac, struct package_PrimaryWDigestHash,
pdb->num_hashes);
if (!pdb->hashes) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
for (i=0; i < ARRAY_SIZE(wdigest); i++) {
/* if there's an old supplementaCredentials blob then parse it */
if (io->o.supplemental) {
ndr_err = ndr_pull_struct_blob_all(io->o.supplemental, io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
&_old_scb,
(ndr_pull_flags_fn_t)ndr_pull_supplementalCredentialsBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
}
ndr_err = ndr_push_struct_blob(&pknb_blob, io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
&pknb,
(ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
}
pknb_hexstr = data_blob_hex_string_upper(io->ac, &pknb_blob);
if (!pknb_hexstr) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
pkn->name = "Primary:Kerberos-Newer-Keys";
pkn->reserved = 1;
}
ndr_err = ndr_push_struct_blob(&pkb_blob, io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
&pkb,
(ndr_push_flags_fn_t)ndr_push_package_PrimaryKerberosBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
}
pkb_hexstr = data_blob_hex_string_upper(io->ac, &pkb_blob);
if (!pkb_hexstr) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
pk->name = "Primary:Kerberos";
pk->reserved = 1;
}
ndr_err = ndr_push_struct_blob(&pdb_blob, io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
&pdb,
(ndr_push_flags_fn_t)ndr_push_package_PrimaryWDigestBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
}
pdb_hexstr = data_blob_hex_string_upper(io->ac, &pdb_blob);
if (!pdb_hexstr) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
pd->name = "Primary:WDigest";
pd->reserved = 1;
pcb.cleartext = *io->n.cleartext_utf16;
ndr_err = ndr_push_struct_blob(&pcb_blob, io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
&pcb,
(ndr_push_flags_fn_t)ndr_push_package_PrimaryCLEARTEXTBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
}
pcb_hexstr = data_blob_hex_string_upper(io->ac, &pcb_blob);
if (!pcb_hexstr) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
pc->name = "Primary:CLEARTEXT";
pc->reserved = 1;
*/
pb.names = names;
ndr_err = ndr_push_struct_blob(&pb_blob, io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
&pb,
(ndr_push_flags_fn_t)ndr_push_package_PackagesBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
}
pb_hexstr = data_blob_hex_string_upper(io->ac, &pb_blob);
if (!pb_hexstr) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
pp->name = "Packages";
pp->reserved = 2;
scb.sub.packages = packages;
ndr_err = ndr_push_struct_blob(&io->g.supplemental, io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
&scb,
(ndr_push_flags_fn_t)ndr_push_supplementalCredentialsBlob);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
ldb = ldb_module_get_ctx(io->ac->module);
if (g->cleartext_utf8) {
- char **cleartext_utf16_str;
struct ldb_val *cleartext_utf16_blob;
- 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;
+ return ldb_oom(ldb);
}
- if (!convert_string_talloc_convenience(io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
- CH_UTF8, CH_UTF16,
- 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");
- return LDB_ERR_OPERATIONS_ERROR;
+ if (!convert_string_talloc(io->ac,
+ CH_UTF8, CH_UTF16,
+ g->cleartext_utf8->data,
+ g->cleartext_utf8->length,
+ (void *)&cleartext_utf16_blob->data,
+ &cleartext_utf16_blob->length,
+ false)) {
+ if (g->cleartext_utf8->length != 0) {
+ talloc_free(cleartext_utf16_blob);
+ ldb_asprintf_errstring(ldb,
+ "setup_password_fields: "
+ "failed to generate UTF16 password from cleartext UTF8 one for user '%s'!",
+ io->u.sAMAccountName);
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ } else {
+ /* passwords with length "0" are valid! */
+ cleartext_utf16_blob->data = NULL;
+ cleartext_utf16_blob->length = 0;
+ }
}
- *cleartext_utf16_blob = data_blob_const(cleartext_utf16_str,
- converted_pw_len);
g->cleartext_utf16 = cleartext_utf16_blob;
} else if (g->cleartext_utf16) {
- char *cleartext_utf8_str;
struct ldb_val *cleartext_utf8_blob;
- 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;
+ return ldb_oom(ldb);
}
- if (!convert_string_talloc_convenience(io->ac,
- lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
- CH_UTF16MUNGED, CH_UTF8,
- 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 */
- talloc_free(cleartext_utf8_blob);
- } else {
- *cleartext_utf8_blob = data_blob_const(cleartext_utf8_str,
- converted_pw_len);
- g->cleartext_utf8 = cleartext_utf8_blob;
+ if (!convert_string_talloc(io->ac,
+ CH_UTF16MUNGED, CH_UTF8,
+ g->cleartext_utf16->data,
+ g->cleartext_utf16->length,
+ (void *)&cleartext_utf8_blob->data,
+ &cleartext_utf8_blob->length,
+ false)) {
+ if (g->cleartext_utf16->length != 0) {
+ /* We must bail out here, the input wasn't even
+ * a multiple of 2 bytes */
+ talloc_free(cleartext_utf8_blob);
+ ldb_asprintf_errstring(ldb,
+ "setup_password_fields: "
+ "failed to generate UTF8 password from cleartext UTF 16 one for user '%s' - the latter had odd length (length must be a multiple of 2)!",
+ io->u.sAMAccountName);
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ } else {
+ /* passwords with length "0" are valid! */
+ cleartext_utf8_blob->data = NULL;
+ cleartext_utf8_blob->length = 0;
+ }
}
+ g->cleartext_utf8 = cleartext_utf8_blob;
}
if (g->cleartext_utf16) {
nt_hash = talloc(io->ac, struct samr_Password);
if (!nt_hash) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
g->nt_hash = nt_hash;
g->cleartext_utf16->length);
}
- if (g->cleartext_utf8 &&
- lp_lanman_auth(ldb_get_opaque(ldb, "loadparm"))) {
+ if (g->cleartext_utf8) {
struct samr_Password *lm_hash;
lm_hash = talloc(io->ac, struct samr_Password);
if (!lm_hash) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
/* compute the new lm hash */
static int setup_password_fields(struct setup_password_fields_io *io)
{
- struct ldb_context *ldb;
+ struct ldb_context *ldb = ldb_module_get_ctx(io->ac->module);
+ struct loadparm_context *lp_ctx =
+ lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
+ struct loadparm_context);
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;
}
- ret = setup_lm_fields(io);
- if (ret != LDB_SUCCESS) {
- return ret;
+ if (lpcfg_lanman_auth(lp_ctx)) {
+ ret = setup_lm_fields(io);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+ } else {
+ io->g.lm_hash = NULL;
+ io->g.lm_history_len = 0;
}
ret = setup_supplemental_field(io);
return LDB_SUCCESS;
}
+static int check_password_restrictions(struct setup_password_fields_io *io)
+{
+ struct ldb_context *ldb;
+ int ret;
+ enum samr_ValidationStatus stat;
+
+ ldb = ldb_module_get_ctx(io->ac->module);
+
+ /* First check the old password is correct, for password changes */
+ if (!io->ac->pwd_reset) {
+ bool nt_hash_checked = false;
+
+ /* we need the old nt or lm hash given by the client */
+ if (!io->og.nt_hash && !io->og.lm_hash) {
+ ldb_asprintf_errstring(ldb,
+ "check_password_restrictions: "
+ "You need to provide the old password in order "
+ "to change it!");
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+
+ /* The password modify through the NT hash is encouraged and
+ has no problems at all */
+ if (io->og.nt_hash) {
+ if (!io->o.nt_hash) {
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "There's no old nt_hash, which is needed "
+ "in order to change your password!",
+ W_ERROR_V(WERR_INVALID_PASSWORD),
+ ldb_strerror(ret));
+ return ret;
+ }
+
+ if (memcmp(io->og.nt_hash->hash, io->o.nt_hash->hash, 16) != 0) {
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "The old password specified doesn't match!",
+ W_ERROR_V(WERR_INVALID_PASSWORD),
+ ldb_strerror(ret));
+ return ret;
+ }
+
+ nt_hash_checked = true;
+ }
+
+ /* But it is also possible to change a password by the LM hash
+ * alone for compatibility reasons. This check is optional if
+ * the NT hash was already checked - otherwise it's mandatory.
+ * (as the SAMR operations request it). */
+ if (io->og.lm_hash) {
+ if (!io->o.lm_hash && !nt_hash_checked) {
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "There's no old lm_hash, which is needed "
+ "in order to change your password!",
+ W_ERROR_V(WERR_INVALID_PASSWORD),
+ ldb_strerror(ret));
+ return ret;
+ }
+
+ if (io->o.lm_hash &&
+ memcmp(io->og.lm_hash->hash, io->o.lm_hash->hash, 16) != 0) {
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "The old password specified doesn't match!",
+ W_ERROR_V(WERR_INVALID_PASSWORD),
+ ldb_strerror(ret));
+ return ret;
+ }
+ }
+ }
+
+ if (io->u.restrictions == 0) {
+ /* FIXME: Is this right? */
+ return LDB_SUCCESS;
+ }
+
+ /*
+ * Fundamental password checks done by the call
+ * "samdb_check_password".
+ * It is also in use by "dcesrv_samr_ValidatePassword".
+ */
+ if (io->n.cleartext_utf8 != NULL) {
+ stat = samdb_check_password(io->n.cleartext_utf8,
+ io->ac->status->domain_data.pwdProperties,
+ io->ac->status->domain_data.minPwdLength);
+ switch (stat) {
+ case SAMR_VALIDATION_STATUS_SUCCESS:
+ /* perfect -> proceed! */
+ break;
+
+ case SAMR_VALIDATION_STATUS_PWD_TOO_SHORT:
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "the password is too short. It should be equal or longer than %u characters!",
+ W_ERROR_V(WERR_PASSWORD_RESTRICTION),
+ ldb_strerror(ret),
+ io->ac->status->domain_data.minPwdLength);
+ io->ac->status->reject_reason = SAM_PWD_CHANGE_PASSWORD_TOO_SHORT;
+ return ret;
+
+ case SAMR_VALIDATION_STATUS_NOT_COMPLEX_ENOUGH:
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "the password does not meet the complexity criterias!",
+ W_ERROR_V(WERR_PASSWORD_RESTRICTION),
+ ldb_strerror(ret));
+ io->ac->status->reject_reason = SAM_PWD_CHANGE_NOT_COMPLEX;
+ return ret;
+
+ default:
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "the password doesn't fit by a certain reason!",
+ W_ERROR_V(WERR_PASSWORD_RESTRICTION),
+ ldb_strerror(ret));
+ return ret;
+ }
+ }
+
+ if (io->ac->pwd_reset) {
+ return LDB_SUCCESS;
+ }
+
+ if (io->n.nt_hash) {
+ uint32_t i;
+
+ /* checks the NT hash password history */
+ for (i = 0; i < io->o.nt_history_len; i++) {
+ ret = memcmp(io->n.nt_hash, io->o.nt_history[i].hash, 16);
+ if (ret == 0) {
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "the password was already used (in history)!",
+ W_ERROR_V(WERR_PASSWORD_RESTRICTION),
+ ldb_strerror(ret));
+ io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
+ return ret;
+ }
+ }
+ }
+
+ if (io->n.lm_hash) {
+ uint32_t i;
+
+ /* checks the LM hash password history */
+ for (i = 0; i < io->o.lm_history_len; i++) {
+ ret = memcmp(io->n.nt_hash, io->o.lm_history[i].hash, 16);
+ if (ret == 0) {
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "the password was already used (in history)!",
+ W_ERROR_V(WERR_PASSWORD_RESTRICTION),
+ ldb_strerror(ret));
+ io->ac->status->reject_reason = SAM_PWD_CHANGE_PWD_IN_HISTORY;
+ return ret;
+ }
+ }
+ }
+
+ /* are all password changes disallowed? */
+ if (io->ac->status->domain_data.pwdProperties & DOMAIN_REFUSE_PASSWORD_CHANGE) {
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "password changes disabled!",
+ W_ERROR_V(WERR_PASSWORD_RESTRICTION),
+ ldb_strerror(ret));
+ return ret;
+ }
+
+ /* can this user change the password? */
+ if (io->u.userAccountControl & UF_PASSWD_CANT_CHANGE) {
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "password can't be changed on this account!",
+ W_ERROR_V(WERR_PASSWORD_RESTRICTION),
+ ldb_strerror(ret));
+ return ret;
+ }
+
+ /* Password minimum age: yes, this is a minus. The ages are in negative 100nsec units! */
+ if (io->u.pwdLastSet - io->ac->status->domain_data.minPwdAge > io->g.last_set) {
+ ret = LDB_ERR_CONSTRAINT_VIOLATION;
+ ldb_asprintf_errstring(ldb,
+ "%08X: %s - check_password_restrictions: "
+ "password is too young to change!",
+ W_ERROR_V(WERR_PASSWORD_RESTRICTION),
+ ldb_strerror(ret));
+ return ret;
+ }
+
+ return LDB_SUCCESS;
+}
+
+/*
+ * This is intended for use by the "password_hash" module since there
+ * password changes can be specified through one message element with the
+ * new password (to set) and another one with the old password (to unset).
+ *
+ * The first which sets a password (new value) can have flags
+ * (LDB_FLAG_MOD_ADD, LDB_FLAG_MOD_REPLACE) but also none (on "add" operations
+ * for entries). The latter (old value) has always specified
+ * LDB_FLAG_MOD_DELETE.
+ *
+ * Returns LDB_ERR_CONSTRAINT_VIOLATION and LDB_ERR_UNWILLING_TO_PERFORM if
+ * matching message elements are malformed in respect to the set/change rules.
+ * Otherwise it returns LDB_SUCCESS.
+ */
+static int msg_find_old_and_new_pwd_val(const struct ldb_message *msg,
+ const char *name,
+ enum ldb_request_type operation,
+ const struct ldb_val **new_val,
+ const struct ldb_val **old_val)
+{
+ unsigned int i;
+
+ *new_val = NULL;
+ *old_val = NULL;
+
+ if (msg == NULL) {
+ return LDB_SUCCESS;
+ }
+
+ for (i = 0; i < msg->num_elements; i++) {
+ if (ldb_attr_cmp(msg->elements[i].name, name) != 0) {
+ continue;
+ }
+
+ if ((operation == LDB_MODIFY) &&
+ (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_DELETE)) {
+ /* 0 values are allowed */
+ if (msg->elements[i].num_values == 1) {
+ *old_val = &msg->elements[i].values[0];
+ } else if (msg->elements[i].num_values > 1) {
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ }
+ } else if ((operation == LDB_MODIFY) &&
+ (LDB_FLAG_MOD_TYPE(msg->elements[i].flags) == LDB_FLAG_MOD_REPLACE)) {
+ if (msg->elements[i].num_values > 0) {
+ *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
+ } else {
+ return LDB_ERR_UNWILLING_TO_PERFORM;
+ }
+ } else {
+ /* Add operations and LDB_FLAG_MOD_ADD */
+ if (msg->elements[i].num_values > 0) {
+ *new_val = &msg->elements[i].values[msg->elements[i].num_values - 1];
+ } else {
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ }
+ }
+ }
+
+ return LDB_SUCCESS;
+}
+
static int setup_io(struct ph_context *ac,
const struct ldb_message *orig_msg,
const struct ldb_message *searched_msg,
{
const struct ldb_val *quoted_utf16, *old_quoted_utf16, *lm_hash, *old_lm_hash;
struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
+ struct loadparm_context *lp_ctx =
+ lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
+ struct loadparm_context);
int ret;
ZERO_STRUCTP(io);
ldb_get_event_context(ldb),
(struct loadparm_context *)ldb_get_opaque(ldb, "loadparm"),
&io->smb_krb5_context) != 0) {
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_operr(ldb);
}
io->ac = ac;
- io->u.userAccountControl = samdb_result_uint(searched_msg, "userAccountControl", 0);
+ io->u.userAccountControl = ldb_msg_find_attr_as_uint(searched_msg,
+ "userAccountControl", 0);
io->u.pwdLastSet = samdb_result_nttime(searched_msg, "pwdLastSet", 0);
- io->u.sAMAccountName = samdb_result_string(searched_msg, "sAMAccountName", NULL);
- io->u.user_principal_name = samdb_result_string(searched_msg, "userPrincipalName", NULL);
+ io->u.sAMAccountName = ldb_msg_find_attr_as_string(searched_msg,
+ "sAMAccountName", NULL);
+ io->u.user_principal_name = ldb_msg_find_attr_as_string(searched_msg,
+ "userPrincipalName", NULL);
io->u.is_computer = ldb_msg_check_string_attribute(searched_msg, "objectClass", "computer");
if (io->u.sAMAccountName == NULL) {
return LDB_ERR_CONSTRAINT_VIOLATION;
}
- 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;
+ /* Only non-trust accounts have restrictions (possibly this test is the
+ * wrong way around, but we like to be restrictive if possible */
+ io->u.restrictions = !(io->u.userAccountControl
+ & (UF_INTERDOMAIN_TRUST_ACCOUNT | UF_WORKSTATION_TRUST_ACCOUNT
+ | UF_SERVER_TRUST_ACCOUNT));
+
+ if ((io->u.userAccountControl & UF_PASSWD_NOTREQD) != 0) {
+ /* see [MS-ADTS] 2.2.15 */
+ io->u.restrictions = 0;
}
- ret = samdb_msg_find_old_and_new_ldb_val(orig_msg, "clearTextPassword",
- &io->n.cleartext_utf16, &io->og.cleartext_utf16);
+ if (ac->userPassword) {
+ ret = msg_find_old_and_new_pwd_val(orig_msg, "userPassword",
+ ac->req->operation,
+ &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 = msg_find_old_and_new_pwd_val(orig_msg, "clearTextPassword",
+ ac->req->operation,
+ &io->n.cleartext_utf16,
+ &io->og.cleartext_utf16);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb,
"setup_io: "
that would then be treated as a UTF16 password rather than
a nthash */
- ret = samdb_msg_find_old_and_new_ldb_val(orig_msg, "unicodePwd",
- "ed_utf16, &old_quoted_utf16);
+ ret = msg_find_old_and_new_pwd_val(orig_msg, "unicodePwd",
+ ac->req->operation,
+ "ed_utf16,
+ &old_quoted_utf16);
if (ret != LDB_SUCCESS) {
ldb_asprintf_errstring(ldb,
"setup_io: "
*/
quoted_utf16_2 = talloc(io->ac, struct ldb_val);
if (quoted_utf16_2 == NULL) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
quoted_utf16_2->data = quoted_utf16->data + 2;
io->n.cleartext_utf16 = quoted_utf16_2;
io->n.nt_hash = NULL;
- } else {
+ } else if (quoted_utf16) {
/* We have only the hash available -> so no plaintext here */
if (!ac->hash_values) {
/* refuse the change if someone wants to change
*/
old_quoted_utf16_2 = talloc(io->ac, struct ldb_val);
if (old_quoted_utf16_2 == NULL) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
old_quoted_utf16_2->data = old_quoted_utf16->data + 2;
io->og.cleartext_utf16 = old_quoted_utf16_2;
io->og.nt_hash = NULL;
- } else {
+ } else if (old_quoted_utf16) {
/* We have only the hash available -> so no plaintext here */
if (!ac->hash_values) {
/* refuse the change if someone wants to change
/* 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);
+ ret = msg_find_old_and_new_pwd_val(orig_msg, "dBCSPwd",
+ ac->req->operation,
+ &lm_hash, &old_lm_hash);
if (ret != LDB_SUCCESS) {
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) {
+
+ if (lpcfg_lanman_auth(lp_ctx) && (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) {
+ if (lpcfg_lanman_auth(lp_ctx) && (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)));
}
+ /*
+ * Handles the password change control if it's specified. It has the
+ * precedance and overrides already specified old password values of
+ * change requests (but that shouldn't happen since the control is
+ * fully internal and only used in conjunction with replace requests!).
+ */
+ if (ac->change != NULL) {
+ io->og.nt_hash = NULL;
+ if (ac->change->old_nt_pwd_hash != NULL) {
+ io->og.nt_hash = talloc_memdup(io->ac,
+ ac->change->old_nt_pwd_hash,
+ sizeof(struct samr_Password));
+ }
+ io->og.lm_hash = NULL;
+ if (lpcfg_lanman_auth(lp_ctx) && (ac->change->old_lm_pwd_hash != NULL)) {
+ io->og.lm_hash = talloc_memdup(io->ac,
+ ac->change->old_lm_pwd_hash,
+ sizeof(struct samr_Password));
+ }
+ }
+
/* 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)
return LDB_ERR_UNWILLING_TO_PERFORM;
}
+ /* refuse the change if someone tries to set/change the password by
+ * the lanman hash alone and we've deactivated that mechanism. This
+ * would end in an account without any password! */
+ if ((!io->n.cleartext_utf8) && (!io->n.cleartext_utf16)
+ && (!io->n.nt_hash) && (!io->n.lm_hash)) {
+ ldb_asprintf_errstring(ldb,
+ "setup_io: "
+ "It' not possible to delete the password (changes using the LAN Manager hash alone could be deactivated)!");
+ /* on "userPassword" and "clearTextPassword" we've to return
+ * something different, since these are virtual attributes */
+ if ((ldb_msg_find_element(orig_msg, "userPassword") != NULL) ||
+ (ldb_msg_find_element(orig_msg, "clearTextPassword") != NULL)) {
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ }
+ 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)
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
+ || io->og.nt_hash || io->og.lm_hash) {
+ /* If we have an old password specified then for sure it
* is a user "password change" */
ac->pwd_reset = false;
} else {
}
} else {
/* this shouldn't happen */
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_operr(ldb);
}
return LDB_SUCCESS;
}
static struct ph_context *ph_init_context(struct ldb_module *module,
- struct ldb_request *req)
+ struct ldb_request *req,
+ bool userPassword)
{
struct ldb_context *ldb;
struct ph_context *ac;
ac->module = module;
ac->req = req;
+ ac->userPassword = userPassword;
return ac;
}
ctrl->critical = false;
}
- ac->change_old_pw_checked = false;
ctrl = ldb_request_get_control(ac->req,
- DSDB_CONTROL_PASSWORD_CHANGE_OLD_PW_CHECKED_OID);
+ DSDB_CONTROL_PASSWORD_CHANGE_OID);
if (ctrl != NULL) {
- ac->change_old_pw_checked = true;
+ ac->change = (struct dsdb_control_password_change *) ctrl->data;
- /* Mark the "change old password checked" control as uncritical
- * (done) */
+ /* Mark the "change" control as uncritical (done) */
ctrl->critical = false;
}
}
}
/* 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.pwdProperties =
+ ldb_msg_find_attr_as_uint(ares->message, "pwdProperties", -1);
+ ac->status->domain_data.pwdHistoryLength =
+ ldb_msg_find_attr_as_uint(ares->message, "pwdHistoryLength", -1);
+ ac->status->domain_data.maxPwdAge =
+ ldb_msg_find_attr_as_int64(ares->message, "maxPwdAge", -1);
+ ac->status->domain_data.minPwdAge =
+ ldb_msg_find_attr_as_int64(ares->message, "minPwdAge", -1);
+ ac->status->domain_data.minPwdLength =
+ ldb_msg_find_attr_as_uint(ares->message, "minPwdLength", -1);
ac->status->domain_data.store_cleartext =
ac->status->domain_data.pwdProperties & DOMAIN_PASSWORD_STORE_CLEARTEXT;
lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
struct loadparm_context);
- 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->status->domain_data.dns_domain = lpcfg_dnsdomain(lp_ctx);
+ ac->status->domain_data.realm = lpcfg_realm(lp_ctx);
+ ac->status->domain_data.netbios_domain = lpcfg_sam_name(lp_ctx);
ac->status->reject_reason = SAM_PWD_CHANGE_NO_ERROR;
"minPwdAge",
"minPwdLength",
NULL };
+ int ret;
ldb = ldb_module_get_ctx(ac->module);
- return ldb_build_search_req(&ac->dom_req, ldb, ac,
- ldb_get_default_basedn(ldb),
- LDB_SCOPE_BASE,
- NULL, attrs,
- NULL,
- ac, get_domain_data_callback,
- ac->req);
+ ret = ldb_build_search_req(&ac->dom_req, ldb, ac,
+ ldb_get_default_basedn(ldb),
+ LDB_SCOPE_BASE,
+ NULL, attrs,
+ NULL,
+ ac, get_domain_data_callback,
+ ac->req);
+ LDB_REQ_SET_LOCATION(ac->dom_req);
+ return ret;
}
static int password_hash_add(struct ldb_module *module, struct ldb_request *req)
struct ldb_message_element *userPasswordAttr, *clearTextPasswordAttr,
*ntAttr, *lmAttr;
int ret;
+ struct ldb_control *bypass = NULL;
+ bool userPassword = dsdb_user_password_support(module, req, req);
ldb = ldb_module_get_ctx(module);
return ldb_next_request(module, req);
}
+ bypass = ldb_request_get_control(req,
+ DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
+ if (bypass != NULL) {
+ /* Mark the "bypass" control as uncritical (done) */
+ bypass->critical = false;
+ ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_add (bypassing)\n");
+ return password_hash_bypass(module, req);
+ }
+
/* nobody must touch password histories and 'supplementalCredentials' */
if (ldb_msg_find_element(req->op.add.message, "ntPwdHistory")) {
return LDB_ERR_UNWILLING_TO_PERFORM;
/* If no part of this touches the 'userPassword' OR 'clearTextPassword'
* OR 'unicodePwd' OR 'dBCSPwd' we don't need to make any changes. */
- userPasswordAttr = ldb_msg_find_element(req->op.add.message, "userPassword");
+ userPasswordAttr = NULL;
+ if (userPassword) {
+ userPasswordAttr = ldb_msg_find_element(req->op.add.message,
+ "userPassword");
+ /* MS-ADTS 3.1.1.3.1.5.2 */
+ if ((userPasswordAttr != NULL) &&
+ (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ }
+ }
clearTextPasswordAttr = ldb_msg_find_element(req->op.add.message, "clearTextPassword");
ntAttr = ldb_msg_find_element(req->op.add.message, "unicodePwd");
lmAttr = ldb_msg_find_element(req->op.add.message, "dBCSPwd");
return ldb_next_request(module, req);
}
- ac = ph_init_context(module, req);
+ ac = ph_init_context(module, req, userPassword);
if (ac == NULL) {
DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_operr(ldb);
}
ph_apply_controls(ac);
return ret;
}
+ ldb = ldb_module_get_ctx(ac->module);
+
msg = ldb_msg_copy_shallow(ac, ac->req->op.add.message);
if (msg == NULL) {
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_operr(ldb);
}
- /* 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) {
+ /* remove attributes that we just read into 'io' */
+ if (ac->userPassword) {
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, "clearTextPassword");
+ ldb_msg_remove_attr(msg, "unicodePwd");
+ ldb_msg_remove_attr(msg, "dBCSPwd");
ldb_msg_remove_attr(msg, "pwdLastSet");
- ldb = ldb_module_get_ctx(ac->module);
-
ret = setup_password_fields(&io);
if (ret != LDB_SUCCESS) {
return ret;
}
+ ret = check_password_restrictions(&io);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
if (io.g.nt_hash) {
ret = samdb_msg_add_hash(ldb, ac, msg,
"unicodePwd", io.g.nt_hash);
}
}
if (io.g.nt_history_len > 0) {
- ret = samdb_msg_add_hashes(ac, msg,
+ ret = samdb_msg_add_hashes(ldb, ac, msg,
"ntPwdHistory",
io.g.nt_history,
io.g.nt_history_len);
}
}
if (io.g.lm_history_len > 0) {
- ret = samdb_msg_add_hashes(ac, msg,
+ ret = samdb_msg_add_hashes(ldb, ac, msg,
"lmPwdHistory",
io.g.lm_history,
io.g.lm_history_len);
ac->req->controls,
ac, ph_op_callback,
ac->req);
+ LDB_REQ_SET_LOCATION(down_req);
if (ret != LDB_SUCCESS) {
return ret;
}
struct ldb_message *msg;
struct ldb_request *down_req;
int ret;
+ struct ldb_control *bypass = NULL;
+ bool userPassword = dsdb_user_password_support(module, req, req);
ldb = ldb_module_get_ctx(module);
return ldb_next_request(module, req);
}
+ bypass = ldb_request_get_control(req,
+ DSDB_CONTROL_BYPASS_PASSWORD_HASH_OID);
+ if (bypass != NULL) {
+ /* Mark the "bypass" control as uncritical (done) */
+ bypass->critical = false;
+ ldb_debug(ldb, LDB_DEBUG_TRACE, "password_hash_modify (bypassing)\n");
+ return password_hash_bypass(module, req);
+ }
+
/* nobody must touch password histories and 'supplementalCredentials' */
if (ldb_msg_find_element(req->op.mod.message, "ntPwdHistory")) {
return LDB_ERR_UNWILLING_TO_PERFORM;
* on these attributes. */
attr_cnt = 0;
for (l = passwordAttrs; *l != NULL; l++) {
+ if ((!userPassword) && (ldb_attr_cmp(*l, "userPassword") == 0)) {
+ continue;
+ }
+
if (ldb_msg_find_element(req->op.mod.message, *l) != NULL) {
+ /* MS-ADTS 3.1.1.3.1.5.2 */
+ if ((ldb_attr_cmp(*l, "userPassword") == 0) &&
+ (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003)) {
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ }
+
++attr_cnt;
}
}
return ldb_next_request(module, req);
}
- ac = ph_init_context(module, req);
+ ac = ph_init_context(module, req, userPassword);
if (!ac) {
DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_operr(ldb);
}
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);
if (msg == NULL) {
- ldb_oom(ldb);
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_oom(ldb);
}
/* - check for single-valued password attributes
add_attr_cnt = 0;
rep_attr_cnt = 0;
for (l = passwordAttrs; *l != NULL; l++) {
+ if ((!ac->userPassword) &&
+ (ldb_attr_cmp(*l, "userPassword") == 0)) {
+ continue;
+ }
+
while ((passwordAttr = ldb_msg_find_element(msg, *l)) != NULL) {
- if (passwordAttr->flags == LDB_FLAG_MOD_DELETE) {
+ if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE) {
++del_attr_cnt;
}
- if (passwordAttr->flags == LDB_FLAG_MOD_ADD) {
+ if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD) {
++add_attr_cnt;
}
- if (passwordAttr->flags == LDB_FLAG_MOD_REPLACE) {
+ if (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_REPLACE) {
++rep_attr_cnt;
}
if ((passwordAttr->num_values != 1) &&
- (passwordAttr->flags != LDB_FLAG_MOD_REPLACE)) {
+ (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_ADD)) {
+ talloc_free(ac);
+ ldb_asprintf_errstring(ldb,
+ "'%s' attribute must have exactly one value on add operations!",
+ *l);
+ return LDB_ERR_CONSTRAINT_VIOLATION;
+ }
+ if ((passwordAttr->num_values > 1) &&
+ (LDB_FLAG_MOD_TYPE(passwordAttr->flags) == LDB_FLAG_MOD_DELETE)) {
talloc_free(ac);
ldb_asprintf_errstring(ldb,
- "'%s' attributes must have exactly one value!",
+ "'%s' attribute must have zero or one value(s) on delete operations!",
*l);
return LDB_ERR_CONSTRAINT_VIOLATION;
}
- ldb_msg_remove_attr(msg, *l);
+ ldb_msg_remove_element(msg, passwordAttr);
}
}
- if ((del_attr_cnt > 0) && (add_attr_cnt == 0)) {
- talloc_free(ac);
- ldb_set_errstring(ldb,
- "Only the delete action for a password change specified!");
- return LDB_ERR_CONSTRAINT_VIOLATION;
- }
if ((del_attr_cnt == 0) && (add_attr_cnt > 0)) {
talloc_free(ac);
ldb_set_errstring(ldb,
req->controls,
ac, ph_modify_callback,
req);
+ LDB_REQ_SET_LOCATION(down_req);
if (ret != LDB_SUCCESS) {
return ret;
}
NULL,
ac, ph_mod_search_callback,
ac->req);
-
+ LDB_REQ_SET_LOCATION(search_req);
if (ret != LDB_SUCCESS) {
return ret;
}
static int password_hash_mod_do_mod(struct ph_context *ac)
{
- struct ldb_context *ldb;
+ struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
+ struct loadparm_context *lp_ctx =
+ talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
+ struct loadparm_context);
struct ldb_request *mod_req;
struct ldb_message *msg;
const struct ldb_message *orig_msg, *searched_msg;
int ret;
NTSTATUS status;
- ldb = ldb_module_get_ctx(ac->module);
-
/* use a new message structure so that we can modify it */
msg = ldb_msg_new(ac);
if (msg == NULL) {
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_operr(ldb);
}
/* modify dn */
/* Get the old password from the database */
status = samdb_result_passwords(io.ac,
- ldb_get_opaque(ldb, "loadparm"),
- searched_msg,
+ lp_ctx,
+ discard_const_p(struct ldb_message, searched_msg),
&io.o.lm_hash, &io.o.nt_hash);
if (!NT_STATUS_IS_OK(status)) {
- return LDB_ERR_OPERATIONS_ERROR;
+ return ldb_operr(ldb);
}
io.o.nt_history_len = samdb_result_hashes(io.ac, searched_msg, "ntPwdHistory", &io.o.nt_history);
return ret;
}
+ ret = check_password_restrictions(&io);
+ if (ret != LDB_SUCCESS) {
+ return ret;
+ }
+
/* make sure we replace all the old attributes */
ret = ldb_msg_add_empty(msg, "unicodePwd", LDB_FLAG_MOD_REPLACE, NULL);
ret = ldb_msg_add_empty(msg, "dBCSPwd", LDB_FLAG_MOD_REPLACE, NULL);
}
}
if (io.g.nt_history_len > 0) {
- ret = samdb_msg_add_hashes(ac, msg,
+ ret = samdb_msg_add_hashes(ldb, ac, msg,
"ntPwdHistory",
io.g.nt_history,
io.g.nt_history_len);
}
}
if (io.g.lm_history_len > 0) {
- ret = samdb_msg_add_hashes(ac, msg,
+ ret = samdb_msg_add_hashes(ldb, ac, msg,
"lmPwdHistory",
io.g.lm_history,
io.g.lm_history_len);
ac->req->controls,
ac, ph_op_callback,
ac->req);
+ LDB_REQ_SET_LOCATION(mod_req);
if (ret != LDB_SUCCESS) {
return ret;
}
return ldb_next_request(ac->module, mod_req);
}
-_PUBLIC_ const struct ldb_module_ops ldb_password_hash_module_ops = {
+static const struct ldb_module_ops ldb_password_hash_module_ops = {
.name = "password_hash",
.add = password_hash_add,
.modify = password_hash_modify
};
+
+int ldb_password_hash_module_init(const char *version)
+{
+ LDB_MODULE_CHECK_VERSION(version);
+ return ldb_register_module(&ldb_password_hash_module_ops);
+}
git.samba.org / samba.git / blobdiff