#include "includes.h"
#include "rpc_server/dcerpc_server.h"
+#include "rpc_server/common/common.h"
#include "rpc_server/samr/dcesrv_samr.h"
#include "system/time.h"
-#include "../lib/crypto/crypto.h"
+#include "lib/crypto/md4.h"
+#include "dsdb/common/util.h"
#include "dsdb/samdb/samdb.h"
#include "auth/auth.h"
#include "libcli/auth/libcli_auth.h"
#include "../lib/util/util_ldb.h"
#include "rpc_server/samr/proto.h"
#include "auth/auth_sam.h"
+#include "lib/param/loadparm.h"
+#include "librpc/rpc/dcerpc_helper.h"
+#include "librpc/rpc/dcerpc_samr.h"
-#include "libcli/util/gnutls_error.h"
+#include "lib/crypto/gnutls_helpers.h"
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
* logs are consistent, even if some elements are always NULL.
*/
struct auth_usersupplied_info ui = {
- .mapped_state = true,
.was_mapped = true,
.client = {
.account_name = original_client_name,
status,
ui.mapped.domain_name,
ui.mapped.account_name,
- sid);
+ sid,
+ NULL /* client_audit_info */,
+ NULL /* server_audit_info */);
}
/*
samr_ChangePasswordUser
/*
samr_OemChangePasswordUser2
+
+ No longer implemented as it requires the LM hash
*/
NTSTATUS dcesrv_samr_OemChangePasswordUser2(struct dcesrv_call_state *dce_call,
TALLOC_CTX *mem_ctx,
struct samr_OemChangePasswordUser2 *r)
{
- struct auth_session_info *session_info =
- dcesrv_call_session_info(dce_call);
+ return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+/*
+ samr_ChangePasswordUser4
+*/
+NTSTATUS dcesrv_samr_ChangePasswordUser4(struct dcesrv_call_state *dce_call,
+ TALLOC_CTX *mem_ctx,
+ struct samr_ChangePasswordUser4 *r)
+{
+ struct ldb_context *sam_ctx = NULL;
+ struct ldb_message *msg = NULL;
+ struct ldb_dn *dn = NULL;
+ const char *samAccountName = NULL;
+ struct dom_sid *objectSid = NULL;
+ struct samr_Password *nt_pwd = NULL;
+ gnutls_datum_t nt_key;
+ gnutls_datum_t salt = {
+ .data = r->in.password->salt,
+ .size = sizeof(r->in.password->salt),
+ };
+ uint8_t cdk_data[16] = {0};
+ DATA_BLOB cdk = {
+ .data = cdk_data,
+ .length = sizeof(cdk_data),
+ };
+ struct auth_session_info *call_session_info = NULL;
+ struct auth_session_info *old_session_info = NULL;
NTSTATUS status = NT_STATUS_WRONG_PASSWORD;
- DATA_BLOB new_password, new_unicode_password;
- char *new_pass;
- struct samr_CryptPassword *pwbuf = r->in.password;
- struct ldb_context *sam_ctx;
- struct ldb_dn *user_dn;
- int ret;
- struct ldb_message **res;
- const char * const attrs[] = { "objectSid", "dBCSPwd",
- "userAccountControl",
- "msDS-ResultantPSO",
- "msDS-User-Account-Control-Computed",
- "badPwdCount", "badPasswordTime",
- "samAccountName",
- NULL };
- struct samr_Password *lm_pwd;
- DATA_BLOB lm_pwd_blob;
- uint8_t new_lm_hash[16];
- struct samr_Password lm_verifier;
- size_t unicode_pw_len;
- size_t converted_size = 0;
- const char *user_samAccountName = NULL;
- struct dom_sid *user_objectSid = NULL;
+ int rc;
- if (pwbuf == NULL) {
- return NT_STATUS_INVALID_PARAMETER;
- }
+ r->out.result = NT_STATUS_WRONG_PASSWORD;
- if (r->in.hash == NULL) {
+ if (r->in.password == NULL) {
return NT_STATUS_INVALID_PARAMETER;
}
- /* this call can only work with lanman auth */
- if (!lpcfg_lanman_auth(dce_call->conn->dce_ctx->lp_ctx)) {
- return NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER;
+ if (r->in.password->PBKDF2Iterations < 5000 ||
+ r->in.password->PBKDF2Iterations > 1000000) {
+ return NT_STATUS_INVALID_PARAMETER;
}
-
- /* Connect to a SAMDB with system privileges for fetching the old pw
- * hashes. */
+ /*
+ * Connect to a SAMDB with system privileges for fetching the old
+ * password hashes.
+ */
sam_ctx = samdb_connect(mem_ctx,
dce_call->event_ctx,
dce_call->conn->dce_ctx->lp_ctx,
return NT_STATUS_INVALID_SYSTEM_SERVICE;
}
- /* we need the users dn and the domain dn (derived from the
- user SID). We also need the current lm password hash in
- order to decrypt the incoming password */
- ret = gendb_search(sam_ctx,
- mem_ctx, NULL, &res, attrs,
- "(&(sAMAccountName=%s)(objectclass=user))",
- ldb_binary_encode_string(mem_ctx, r->in.account->string));
- if (ret != 1) {
- status = NT_STATUS_NO_SUCH_USER; /* Converted to WRONG_PASSWORD below */
- goto failed;
+ rc = ldb_transaction_start(sam_ctx);
+ if (rc != LDB_SUCCESS) {
+ DBG_WARNING("Failed to start transaction: %s\n",
+ ldb_errstring(sam_ctx));
+ return NT_STATUS_TRANSACTION_ABORTED;
}
- user_dn = res[0]->dn;
+ /*
+ * We use authsam_search_account() to be consistent with the
+ * other callers in the bad password and audit log handling
+ * systems. It ensures we get DSDB_SEARCH_SHOW_EXTENDED_DN.
+ */
+ status = authsam_search_account(mem_ctx,
+ sam_ctx,
+ r->in.account->string,
+ ldb_get_default_basedn(sam_ctx),
+ &msg);
+ if (!NT_STATUS_IS_OK(status)) {
+ ldb_transaction_cancel(sam_ctx);
+ goto done;
+ }
- user_samAccountName = ldb_msg_find_attr_as_string(res[0], "samAccountName", NULL);
- user_objectSid = samdb_result_dom_sid(res, res[0], "objectSid");
+ dn = msg->dn;
+ samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
+ objectSid = samdb_result_dom_sid(msg, msg, "objectSid");
- status = samdb_result_passwords(mem_ctx, dce_call->conn->dce_ctx->lp_ctx,
- res[0], &lm_pwd, NULL);
+ status = samdb_result_passwords(mem_ctx,
+ dce_call->conn->dce_ctx->lp_ctx,
+ msg,
+ &nt_pwd);
if (!NT_STATUS_IS_OK(status)) {
- goto failed;
- } else if (!lm_pwd) {
+ ldb_transaction_cancel(sam_ctx);
+ goto done;
+ }
+
+ if (nt_pwd == NULL) {
+ ldb_transaction_cancel(sam_ctx);
status = NT_STATUS_WRONG_PASSWORD;
- goto failed;
+ goto done;
}
- /* decrypt the password we have been given */
- lm_pwd_blob = data_blob(lm_pwd->hash, sizeof(lm_pwd->hash));
- arcfour_crypt_blob(pwbuf->data, 516, &lm_pwd_blob);
- data_blob_free(&lm_pwd_blob);
+ nt_key = (gnutls_datum_t){
+ .data = nt_pwd->hash,
+ .size = sizeof(nt_pwd->hash),
+ };
- if (!extract_pw_from_buffer(mem_ctx, pwbuf->data, &new_password)) {
- DEBUG(3,("samr: failed to decode password buffer\n"));
- authsam_update_bad_pwd_count(sam_ctx, res[0], ldb_get_default_basedn(sam_ctx));
- status = NT_STATUS_WRONG_PASSWORD;
- goto failed;
+ rc = gnutls_pbkdf2(GNUTLS_MAC_SHA512,
+ &nt_key,
+ &salt,
+ r->in.password->PBKDF2Iterations,
+ cdk.data,
+ cdk.length);
+ if (rc < 0) {
+ ldb_transaction_cancel(sam_ctx);
+ status = NT_STATUS_WRONG_PASSWORD;
+ goto done;
}
- if (!convert_string_talloc_handle(mem_ctx, lpcfg_iconv_handle(dce_call->conn->dce_ctx->lp_ctx),
- CH_DOS, CH_UNIX,
- (const char *)new_password.data,
- new_password.length,
- (void **)&new_pass, &converted_size)) {
- DEBUG(3,("samr: failed to convert incoming password buffer to unix charset\n"));
- authsam_update_bad_pwd_count(sam_ctx, res[0], ldb_get_default_basedn(sam_ctx));
- status = NT_STATUS_WRONG_PASSWORD;
- goto failed;
- }
+ /* Drop to user privileges for the password change */
- if (!convert_string_talloc_handle(mem_ctx, lpcfg_iconv_handle(dce_call->conn->dce_ctx->lp_ctx),
- CH_DOS, CH_UTF16,
- (const char *)new_password.data,
- new_password.length,
- (void **)&new_unicode_password.data, &unicode_pw_len)) {
- DEBUG(3,("samr: failed to convert incoming password buffer to UTF16 charset\n"));
- authsam_update_bad_pwd_count(sam_ctx, res[0], ldb_get_default_basedn(sam_ctx));
- status = NT_STATUS_WRONG_PASSWORD;
- goto failed;
- }
- new_unicode_password.length = unicode_pw_len;
+ old_session_info = ldb_get_opaque(sam_ctx, DSDB_SESSION_INFO);
+ call_session_info = dcesrv_call_session_info(dce_call);
- E_deshash(new_pass, new_lm_hash);
- E_old_pw_hash(new_lm_hash, lm_pwd->hash, lm_verifier.hash);
- if (memcmp(lm_verifier.hash, r->in.hash->hash, 16) != 0) {
- authsam_update_bad_pwd_count(sam_ctx, res[0], ldb_get_default_basedn(sam_ctx));
- status = NT_STATUS_WRONG_PASSWORD;
- goto failed;
+ rc = ldb_set_opaque(sam_ctx, DSDB_SESSION_INFO, call_session_info);
+ if (rc != LDB_SUCCESS) {
+ ldb_transaction_cancel(sam_ctx);
+ status = NT_STATUS_INVALID_SYSTEM_SERVICE;
+ goto done;
}
- /* Connect to a SAMDB with user privileges for the password change */
- sam_ctx = samdb_connect(mem_ctx,
- dce_call->event_ctx,
- dce_call->conn->dce_ctx->lp_ctx,
- session_info,
- dce_call->conn->remote_address,
- 0);
- if (sam_ctx == NULL) {
- return NT_STATUS_INVALID_SYSTEM_SERVICE;
- }
+ status = samr_set_password_aes(dce_call,
+ mem_ctx,
+ &cdk,
+ sam_ctx,
+ dn,
+ NULL,
+ r->in.password,
+ DSDB_PASSWORD_CHECKED_AND_CORRECT);
+ BURN_DATA(cdk_data);
- /* Start transaction */
- ret = ldb_transaction_start(sam_ctx);
- if (ret != LDB_SUCCESS) {
- DEBUG(1, ("Failed to start transaction: %s\n", ldb_errstring(sam_ctx)));
- return NT_STATUS_TRANSACTION_ABORTED;
+ /* Restore our privileges to system level */
+ if (old_session_info != NULL) {
+ ldb_set_opaque(sam_ctx, DSDB_SESSION_INFO, old_session_info);
}
- /* Performs the password modification. We pass the old hashes read out
- * from the database since they were already checked against the user-
- * provided ones. */
- status = samdb_set_password(sam_ctx, mem_ctx,
- user_dn, NULL,
- &new_unicode_password,
- NULL, NULL,
- lm_pwd, NULL, /* this is a user password change */
- NULL,
- NULL);
if (!NT_STATUS_IS_OK(status)) {
ldb_transaction_cancel(sam_ctx);
- goto failed;
+ goto done;
}
/* And this confirms it in a transaction commit */
- ret = ldb_transaction_commit(sam_ctx);
- if (ret != LDB_SUCCESS) {
- DEBUG(1,("Failed to commit transaction to change password on %s: %s\n",
- ldb_dn_get_linearized(user_dn),
- ldb_errstring(sam_ctx)));
+ rc = ldb_transaction_commit(sam_ctx);
+ if (rc != LDB_SUCCESS) {
+ DBG_WARNING("Failed to commit transaction to change password "
+ "on %s: %s\n",
+ ldb_dn_get_linearized(dn),
+ ldb_errstring(sam_ctx));
status = NT_STATUS_TRANSACTION_ABORTED;
- goto failed;
+ goto done;
}
status = NT_STATUS_OK;
-
-failed:
-
- log_password_change_event(dce_call->conn->msg_ctx,
- dce_call->conn->dce_ctx->lp_ctx,
- dce_call->conn->remote_address,
- dce_call->conn->local_address,
- "OemChangePasswordUser2",
- "RC4/DES using LanMan-hash",
- r->in.account->string,
- user_samAccountName,
- status,
- user_objectSid);
- if (NT_STATUS_IS_OK(status)) {
- return NT_STATUS_OK;
+done:
+ {
+ struct imessaging_context *imsg_ctx =
+ dcesrv_imessaging_context(dce_call->conn);
+
+ log_password_change_event(imsg_ctx,
+ dce_call->conn->dce_ctx->lp_ctx,
+ dce_call->conn->remote_address,
+ dce_call->conn->local_address,
+ "samr_ChangePasswordUser4",
+ "AES using NTLM-hash",
+ r->in.account->string,
+ samAccountName,
+ status,
+ objectSid);
}
+
/* Only update the badPwdCount if we found the user */
if (NT_STATUS_EQUAL(status, NT_STATUS_WRONG_PASSWORD)) {
- authsam_update_bad_pwd_count(sam_ctx, res[0], ldb_get_default_basedn(sam_ctx));
+ authsam_update_bad_pwd_count(sam_ctx,
+ msg,
+ ldb_get_default_basedn(sam_ctx));
} else if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)) {
- /* Don't give the game away: (don't allow anonymous users to prove the existence of usernames) */
+ /*
+ * Don't give the game away: (don't allow anonymous users to
+ * prove the existence of usernames)
+ */
status = NT_STATUS_WRONG_PASSWORD;
}
return status;
}
-
-/*
- samr_ChangePasswordUser3
-*/
-NTSTATUS dcesrv_samr_ChangePasswordUser3(struct dcesrv_call_state *dce_call,
- TALLOC_CTX *mem_ctx,
- struct samr_ChangePasswordUser3 *r)
+static NTSTATUS dcesrv_samr_ChangePasswordUser_impl(struct dcesrv_call_state *dce_call,
+ TALLOC_CTX *mem_ctx,
+ struct samr_ChangePasswordUser3 *r,
+ const char *function_name)
{
- struct auth_session_info *session_info =
- dcesrv_call_session_info(dce_call);
+ struct imessaging_context *imsg_ctx =
+ dcesrv_imessaging_context(dce_call->conn);
NTSTATUS status = NT_STATUS_WRONG_PASSWORD;
DATA_BLOB new_password;
struct ldb_context *sam_ctx = NULL;
struct ldb_dn *user_dn = NULL;
int ret;
- struct ldb_message **res;
- const char * const attrs[] = { "unicodePwd", "dBCSPwd",
- "userAccountControl",
- "msDS-ResultantPSO",
- "msDS-User-Account-Control-Computed",
- "badPwdCount", "badPasswordTime",
- "objectSid", NULL };
- struct samr_Password *nt_pwd, *lm_pwd;
- DATA_BLOB nt_pwd_blob;
+ struct ldb_message *msg = NULL;
+ struct samr_Password *nt_pwd;
struct samr_DomInfo1 *dominfo = NULL;
struct userPwdChangeFailureInformation *reject = NULL;
enum samPwdChangeReason reason = SAM_PWD_CHANGE_NO_ERROR;
- uint8_t new_nt_hash[16], new_lm_hash[16];
- struct samr_Password nt_verifier, lm_verifier;
+ uint8_t new_nt_hash[16];
+ struct samr_Password nt_verifier;
const char *user_samAccountName = NULL;
struct dom_sid *user_objectSid = NULL;
+ struct loadparm_context *lp_ctx = dce_call->conn->dce_ctx->lp_ctx;
enum ntlm_auth_level ntlm_auth_level
- = lpcfg_ntlm_auth(dce_call->conn->dce_ctx->lp_ctx);
+ = lpcfg_ntlm_auth(lp_ctx);
+ gnutls_cipher_hd_t cipher_hnd = NULL;
+ gnutls_datum_t nt_session_key;
+ struct auth_session_info *call_session_info = NULL;
+ struct auth_session_info *old_session_info = NULL;
+ int rc;
*r->out.dominfo = NULL;
*r->out.reject = NULL;
/* Connect to a SAMDB with system privileges for fetching the old pw
* hashes. */
- sam_ctx = samdb_connect(mem_ctx,
- dce_call->event_ctx,
- dce_call->conn->dce_ctx->lp_ctx,
- system_session(dce_call->conn->dce_ctx->lp_ctx),
- dce_call->conn->remote_address,
- 0);
+ sam_ctx = dcesrv_samdb_connect_as_system(mem_ctx, dce_call);
if (sam_ctx == NULL) {
return NT_STATUS_INVALID_SYSTEM_SERVICE;
}
- /* we need the users dn and the domain dn (derived from the
- user SID). We also need the current lm and nt password hashes
- in order to decrypt the incoming passwords */
- ret = gendb_search(sam_ctx,
- mem_ctx, NULL, &res, attrs,
- "(&(sAMAccountName=%s)(objectclass=user))",
- ldb_binary_encode_string(mem_ctx, r->in.account->string));
- if (ret != 1) {
- status = NT_STATUS_NO_SUCH_USER; /* Converted to WRONG_PASSWORD below */
+ ret = ldb_transaction_start(sam_ctx);
+ if (ret != LDB_SUCCESS) {
+ DEBUG(1, ("Failed to start transaction: %s\n", ldb_errstring(sam_ctx)));
+ return NT_STATUS_TRANSACTION_ABORTED;
+ }
+
+ /*
+ * We use authsam_search_account() to be consistent with the
+ * other callers in the bad password and audit log handling
+ * systems. It ensures we get DSDB_SEARCH_SHOW_EXTENDED_DN.
+ */
+ status = authsam_search_account(mem_ctx,
+ sam_ctx,
+ r->in.account->string,
+ ldb_get_default_basedn(sam_ctx),
+ &msg);
+ if (!NT_STATUS_IS_OK(status)) {
+ ldb_transaction_cancel(sam_ctx);
goto failed;
}
- user_dn = res[0]->dn;
- user_samAccountName = ldb_msg_find_attr_as_string(res[0], "samAccountName", NULL);
- user_objectSid = samdb_result_dom_sid(res, res[0], "objectSid");
+ user_dn = msg->dn;
+ user_samAccountName = ldb_msg_find_attr_as_string(msg, "samAccountName", NULL);
+ user_objectSid = samdb_result_dom_sid(mem_ctx, msg, "objectSid");
- status = samdb_result_passwords(mem_ctx, dce_call->conn->dce_ctx->lp_ctx,
- res[0], &lm_pwd, &nt_pwd);
+ status = samdb_result_passwords(mem_ctx, lp_ctx,
+ msg, &nt_pwd);
if (!NT_STATUS_IS_OK(status) ) {
+ ldb_transaction_cancel(sam_ctx);
goto failed;
}
if (!nt_pwd) {
status = NT_STATUS_WRONG_PASSWORD;
+ ldb_transaction_cancel(sam_ctx);
goto failed;
}
/* decrypt the password we have been given */
- nt_pwd_blob = data_blob(nt_pwd->hash, sizeof(nt_pwd->hash));
- arcfour_crypt_blob(r->in.nt_password->data, 516, &nt_pwd_blob);
- data_blob_free(&nt_pwd_blob);
+ nt_session_key = (gnutls_datum_t) {
+ .data = nt_pwd->hash,
+ .size = sizeof(nt_pwd->hash),
+ };
+
+ rc = gnutls_cipher_init(&cipher_hnd,
+ GNUTLS_CIPHER_ARCFOUR_128,
+ &nt_session_key,
+ NULL);
+ if (rc < 0) {
+ status = gnutls_error_to_ntstatus(rc, NT_STATUS_CRYPTO_SYSTEM_INVALID);
+ ldb_transaction_cancel(sam_ctx);
+ goto failed;
+ }
+
+ rc = gnutls_cipher_decrypt(cipher_hnd,
+ r->in.nt_password->data,
+ 516);
+ gnutls_cipher_deinit(cipher_hnd);
+ if (rc < 0) {
+ status = gnutls_error_to_ntstatus(rc, NT_STATUS_CRYPTO_SYSTEM_INVALID);
+ ldb_transaction_cancel(sam_ctx);
+ goto failed;
+ }
if (!extract_pw_from_buffer(mem_ctx, r->in.nt_password->data, &new_password)) {
DEBUG(3,("samr: failed to decode password buffer\n"));
status = NT_STATUS_WRONG_PASSWORD;
+ ldb_transaction_cancel(sam_ctx);
goto failed;
}
if (r->in.nt_verifier == NULL) {
status = NT_STATUS_WRONG_PASSWORD;
+ ldb_transaction_cancel(sam_ctx);
goto failed;
}
/* check NT verifier */
mdfour(new_nt_hash, new_password.data, new_password.length);
- E_old_pw_hash(new_nt_hash, nt_pwd->hash, nt_verifier.hash);
- if (memcmp(nt_verifier.hash, r->in.nt_verifier->hash, 16) != 0) {
+ rc = E_old_pw_hash(new_nt_hash, nt_pwd->hash, nt_verifier.hash);
+ if (rc != 0) {
+ status = gnutls_error_to_ntstatus(rc, NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER);
+ ldb_transaction_cancel(sam_ctx);
+ goto failed;
+ }
+ if (!mem_equal_const_time(nt_verifier.hash, r->in.nt_verifier->hash, 16)) {
status = NT_STATUS_WRONG_PASSWORD;
+ ldb_transaction_cancel(sam_ctx);
goto failed;
}
- /* check LM verifier (really not needed as we just checked the
- * much stronger NT hash, but the RPC-SAMR test checks for
- * this) */
- if (lm_pwd && r->in.lm_verifier != NULL) {
- char *new_pass;
- size_t converted_size = 0;
-
- if (!convert_string_talloc_handle(mem_ctx, lpcfg_iconv_handle(dce_call->conn->dce_ctx->lp_ctx),
- CH_UTF16, CH_UNIX,
- (const char *)new_password.data,
- new_password.length,
- (void **)&new_pass, &converted_size)) {
- E_deshash(new_pass, new_lm_hash);
- E_old_pw_hash(new_nt_hash, lm_pwd->hash, lm_verifier.hash);
- if (memcmp(lm_verifier.hash, r->in.lm_verifier->hash, 16) != 0) {
- status = NT_STATUS_WRONG_PASSWORD;
- goto failed;
- }
- }
- }
+ /* Drop to user privileges for the password change */
- /* Connect to a SAMDB with user privileges for the password change */
- sam_ctx = samdb_connect(mem_ctx,
- dce_call->event_ctx,
- dce_call->conn->dce_ctx->lp_ctx,
- session_info,
- dce_call->conn->remote_address,
- 0);
- if (sam_ctx == NULL) {
- return NT_STATUS_INVALID_SYSTEM_SERVICE;
- }
+ old_session_info = ldb_get_opaque(sam_ctx, DSDB_SESSION_INFO);
+ call_session_info = dcesrv_call_session_info(dce_call);
- ret = ldb_transaction_start(sam_ctx);
+ ret = ldb_set_opaque(sam_ctx, DSDB_SESSION_INFO, call_session_info);
if (ret != LDB_SUCCESS) {
- DEBUG(1, ("Failed to start transaction: %s\n", ldb_errstring(sam_ctx)));
- return NT_STATUS_TRANSACTION_ABORTED;
+ status = NT_STATUS_INVALID_SYSTEM_SERVICE;
+ ldb_transaction_cancel(sam_ctx);
+ goto failed;
}
/* Performs the password modification. We pass the old hashes read out
status = samdb_set_password(sam_ctx, mem_ctx,
user_dn, NULL,
&new_password,
- NULL, NULL,
- lm_pwd, nt_pwd, /* this is a user password change */
+ NULL,
+ DSDB_PASSWORD_CHECKED_AND_CORRECT,
&reason,
&dominfo);
+ /* Restore our privileges to system level */
+ if (old_session_info != NULL) {
+ ldb_set_opaque(sam_ctx, DSDB_SESSION_INFO, old_session_info);
+ }
+
if (!NT_STATUS_IS_OK(status)) {
ldb_transaction_cancel(sam_ctx);
goto failed;
failed:
- log_password_change_event(dce_call->conn->msg_ctx,
- dce_call->conn->dce_ctx->lp_ctx,
+ log_password_change_event(imsg_ctx,
+ lp_ctx,
dce_call->conn->remote_address,
dce_call->conn->local_address,
- "samr_ChangePasswordUser3",
+ function_name,
"RC4/DES using NTLM-hash",
r->in.account->string,
user_samAccountName,
/* Only update the badPwdCount if we found the user */
if (NT_STATUS_EQUAL(status, NT_STATUS_WRONG_PASSWORD)) {
- authsam_update_bad_pwd_count(sam_ctx, res[0], ldb_get_default_basedn(sam_ctx));
+ NTSTATUS bad_pwd_status;
+
+ bad_pwd_status = authsam_update_bad_pwd_count(
+ sam_ctx, msg, ldb_get_default_basedn(sam_ctx));
+ if (NT_STATUS_EQUAL(bad_pwd_status, NT_STATUS_ACCOUNT_LOCKED_OUT)) {
+ status = bad_pwd_status;
+ }
} else if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)) {
/* Don't give the game away: (don't allow anonymous users to prove the existence of usernames) */
status = NT_STATUS_WRONG_PASSWORD;
return status;
}
+/*
+ samr_ChangePasswordUser3
+*/
+NTSTATUS dcesrv_samr_ChangePasswordUser3(struct dcesrv_call_state *dce_call,
+ TALLOC_CTX *mem_ctx,
+ struct samr_ChangePasswordUser3 *r)
+{
+ return dcesrv_samr_ChangePasswordUser_impl(dce_call, mem_ctx, r,
+ "samr_ChangePasswordUser3");
+}
+
/*
samr_ChangePasswordUser2
r2.out.dominfo = &dominfo;
r2.out.reject = &reject;
- return dcesrv_samr_ChangePasswordUser3(dce_call, mem_ctx, &r2);
+ return dcesrv_samr_ChangePasswordUser_impl(dce_call, mem_ctx, &r2,
+ "samr_ChangePasswordUser2");
}
NTSTATUS nt_status;
DATA_BLOB new_password;
DATA_BLOB session_key = data_blob(NULL, 0);
+ gnutls_cipher_hd_t cipher_hnd = NULL;
+ gnutls_datum_t _session_key;
+ struct auth_session_info *session_info =
+ dcesrv_call_session_info(dce_call);
+ struct loadparm_context *lp_ctx = dce_call->conn->dce_ctx->lp_ctx;
+ int rc;
+ bool encrypted;
+
+ encrypted = dcerpc_is_transport_encrypted(session_info);
+ if (lpcfg_weak_crypto(lp_ctx) == SAMBA_WEAK_CRYPTO_DISALLOWED &&
+ !encrypted) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
nt_status = dcesrv_transport_session_key(dce_call, &session_key);
if (!NT_STATUS_IS_OK(nt_status)) {
- DEBUG(3,("samr: failed to get session key: %s "
- "=> NT_STATUS_WRONG_PASSWORD\n",
- nt_errstr(nt_status)));
- return NT_STATUS_WRONG_PASSWORD;
+ DBG_NOTICE("samr: failed to get session key: %s\n",
+ nt_errstr(nt_status));
+ return nt_status;
+ }
+
+ _session_key = (gnutls_datum_t) {
+ .data = session_key.data,
+ .size = session_key.length,
+ };
+
+ /*
+ * This is safe to support as we only have a session key
+ * over a SMB connection which we force to be encrypted.
+ */
+ GNUTLS_FIPS140_SET_LAX_MODE();
+ rc = gnutls_cipher_init(&cipher_hnd,
+ GNUTLS_CIPHER_ARCFOUR_128,
+ &_session_key,
+ NULL);
+ if (rc < 0) {
+ GNUTLS_FIPS140_SET_STRICT_MODE();
+ nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_CRYPTO_SYSTEM_INVALID);
+ goto out;
}
- arcfour_crypt_blob(pwbuf->data, 516, &session_key);
+ rc = gnutls_cipher_decrypt(cipher_hnd,
+ pwbuf->data,
+ 516);
+ gnutls_cipher_deinit(cipher_hnd);
+ GNUTLS_FIPS140_SET_STRICT_MODE();
+ if (rc < 0) {
+ nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_CRYPTO_SYSTEM_INVALID);
+ goto out;
+ }
if (!extract_pw_from_buffer(mem_ctx, pwbuf->data, &new_password)) {
DEBUG(3,("samr: failed to decode password buffer\n"));
/* set the password - samdb needs to know both the domain and user DNs,
so the domain password policy can be used */
- return samdb_set_password(sam_ctx, mem_ctx,
- account_dn, domain_dn,
- &new_password,
- NULL, NULL,
- NULL, NULL, /* This is a password set, not change */
- NULL, NULL);
+ nt_status = samdb_set_password(sam_ctx,
+ mem_ctx,
+ account_dn,
+ domain_dn,
+ &new_password,
+ NULL,
+ DSDB_PASSWORD_RESET,
+ NULL,
+ NULL);
+out:
+ return nt_status;
}
TALLOC_CTX *mem_ctx,
struct samr_CryptPasswordEx *pwbuf)
{
+ struct loadparm_context *lp_ctx = dce_call->conn->dce_ctx->lp_ctx;
+ struct auth_session_info *session_info =
+ dcesrv_call_session_info(dce_call);
NTSTATUS nt_status;
DATA_BLOB new_password;
- DATA_BLOB co_session_key;
+
+ /* The confounder is in the last 16 bytes of the buffer */
+ DATA_BLOB confounder = data_blob_const(&pwbuf->data[516], 16);
+ DATA_BLOB pw_data = data_blob_const(pwbuf->data, 516);
DATA_BLOB session_key = data_blob(NULL, 0);
- gnutls_hash_hd_t hash_hnd = NULL;
int rc;
+ bool encrypted;
nt_status = dcesrv_transport_session_key(dce_call, &session_key);
if (!NT_STATUS_IS_OK(nt_status)) {
return NT_STATUS_WRONG_PASSWORD;
}
- co_session_key = data_blob_talloc(mem_ctx, NULL, 16);
- if (!co_session_key.data) {
- return NT_STATUS_NO_MEMORY;
+ encrypted = dcerpc_is_transport_encrypted(session_info);
+ if (lpcfg_weak_crypto(lp_ctx) == SAMBA_WEAK_CRYPTO_DISALLOWED &&
+ !encrypted) {
+ return NT_STATUS_ACCESS_DENIED;
}
- rc = gnutls_hash_init(&hash_hnd, GNUTLS_DIG_MD5);
- if (rc < 0) {
- nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED);
- goto out;
- }
-
- rc = gnutls_hash(hash_hnd, &pwbuf->data[516], 16);
- if (rc < 0) {
- gnutls_hash_deinit(hash_hnd, NULL);
- nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED);
- goto out;
- }
- rc = gnutls_hash(hash_hnd, session_key.data, session_key.length);
+ GNUTLS_FIPS140_SET_LAX_MODE();
+ rc = samba_gnutls_arcfour_confounded_md5(&confounder,
+ &session_key,
+ &pw_data,
+ SAMBA_GNUTLS_DECRYPT);
+ GNUTLS_FIPS140_SET_STRICT_MODE();
if (rc < 0) {
- gnutls_hash_deinit(hash_hnd, NULL);
nt_status = gnutls_error_to_ntstatus(rc, NT_STATUS_HASH_NOT_SUPPORTED);
goto out;
}
- gnutls_hash_deinit(hash_hnd, co_session_key.data);
-
- arcfour_crypt_blob(pwbuf->data, 516, &co_session_key);
- ZERO_ARRAY_LEN(co_session_key.data,
- co_session_key.length);
if (!extract_pw_from_buffer(mem_ctx, pwbuf->data, &new_password)) {
DEBUG(3,("samr: failed to decode password buffer\n"));
domain_dn,
&new_password,
NULL,
- NULL,
- NULL,
- NULL, /* This is a password set, not change */
+ DSDB_PASSWORD_RESET,
NULL,
NULL);
ZERO_ARRAY_LEN(new_password.data,
DATA_BLOB session_key = data_blob(NULL, 0);
DATA_BLOB in, out;
NTSTATUS nt_status = NT_STATUS_OK;
+ int rc;
nt_status = dcesrv_transport_session_key(dce_call, &session_key);
if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_USER_SESSION_KEY)) {
return nt_status;
}
- if (lm_pwd_hash != NULL) {
- in = data_blob_const(lm_pwd_hash, 16);
- out = data_blob_talloc_zero(mem_ctx, 16);
-
- sess_crypt_blob(&out, &in, &session_key, false);
-
- d_lm_pwd_hash = (struct samr_Password *) out.data;
- }
if (nt_pwd_hash != NULL) {
in = data_blob_const(nt_pwd_hash, 16);
out = data_blob_talloc_zero(mem_ctx, 16);
- sess_crypt_blob(&out, &in, &session_key, false);
+ rc = sess_crypt_blob(&out, &in, &session_key, SAMBA_GNUTLS_DECRYPT);
+ if (rc != 0) {
+ return gnutls_error_to_ntstatus(rc,
+ NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER);
+ }
d_nt_pwd_hash = (struct samr_Password *) out.data;
}
if ((d_lm_pwd_hash != NULL) || (d_nt_pwd_hash != NULL)) {
nt_status = samdb_set_password(sam_ctx, mem_ctx, account_dn,
domain_dn, NULL,
- d_lm_pwd_hash, d_nt_pwd_hash,
- NULL, NULL, /* this is a password set */
+ d_nt_pwd_hash,
+ DSDB_PASSWORD_RESET,
NULL, NULL);
}
return nt_status;
}
+
+NTSTATUS samr_set_password_aes(struct dcesrv_call_state *dce_call,
+ TALLOC_CTX *mem_ctx,
+ const DATA_BLOB *cdk,
+ struct ldb_context *sam_ctx,
+ struct ldb_dn *account_dn,
+ struct ldb_dn *domain_dn,
+ struct samr_EncryptedPasswordAES *pwbuf,
+ enum dsdb_password_checked old_password_checked)
+{
+ DATA_BLOB pw_data = data_blob_null;
+ DATA_BLOB new_password = data_blob_null;
+ const DATA_BLOB ciphertext =
+ data_blob_const(pwbuf->cipher, pwbuf->cipher_len);
+ DATA_BLOB iv = data_blob_const(pwbuf->salt, sizeof(pwbuf->salt));
+ NTSTATUS nt_status = NT_STATUS_OK;
+ bool ok;
+
+ nt_status = samba_gnutls_aead_aes_256_cbc_hmac_sha512_decrypt(
+ mem_ctx,
+ &ciphertext,
+ cdk,
+ &samr_aes256_enc_key_salt,
+ &samr_aes256_mac_key_salt,
+ &iv,
+ pwbuf->auth_data,
+ &pw_data);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+
+ ok = extract_pwd_blob_from_buffer514(mem_ctx,
+ pw_data.data,
+ &new_password);
+ TALLOC_FREE(pw_data.data);
+ if (!ok) {
+ DBG_NOTICE("samr: failed to decode password buffer\n");
+ return NT_STATUS_WRONG_PASSWORD;
+ }
+
+ nt_status = samdb_set_password(sam_ctx,
+ mem_ctx,
+ account_dn,
+ domain_dn,
+ &new_password,
+ NULL,
+ old_password_checked,
+ NULL,
+ NULL);
+ TALLOC_FREE(new_password.data);
+
+ return nt_status;
+}
git.samba.org / samba.git / blobdiff