s4-kdc: Remove obsolete kpasswdd heimdal implementation

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

1 files changed, 0 insertions, 551 deletions

diff --git a/source4/kdc/kpasswd-heimdal.c b/source4/kdc/kpasswd-heimdal.c
deleted file mode 100644
index 49fc755dad3..00000000000
--- a/source4/kdc/kpasswd-heimdal.c
+++ /dev/null
@@ -1,551 +0,0 @@
-/*
-   Unix SMB/CIFS implementation.
-
-   kpasswd Server implementation
-
-   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
-   Copyright (C) Andrew Tridgell	2005
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-#include "smbd/service_task.h"
-#include "auth/gensec/gensec.h"
-#include "auth/credentials/credentials.h"
-#include "auth/auth.h"
-#include "dsdb/samdb/samdb.h"
-#include "../lib/util/util_ldb.h"
-#include "libcli/security/security.h"
-#include "param/param.h"
-#include "kdc/kdc-server.h"
-#include "kdc/kdc-glue.h"
-#include "dsdb/common/util.h"
-#include "kdc/kpasswd_glue.h"
-#include "kdc/kpasswd-helper.h"
-
-/* Return true if there is a valid error packet formed in the error_blob */
-static bool kpasswdd_make_unauth_error_reply(struct kdc_server *kdc,
-					    TALLOC_CTX *mem_ctx,
-					    uint16_t result_code,
-					    const char *error_string,
-					    DATA_BLOB *error_blob)
-{
-	bool ret;
-	int kret;
-	DATA_BLOB error_bytes;
-	krb5_data k5_error_bytes, k5_error_blob;
-	ret = kpasswd_make_error_reply(mem_ctx, result_code, error_string,
-				       &error_bytes);
-	if (!ret) {
-		return false;
-	}
-	k5_error_bytes.data = error_bytes.data;
-	k5_error_bytes.length = error_bytes.length;
-	kret = smb_krb5_mk_error(kdc->smb_krb5_context->krb5_context,
-				 result_code,
-				 NULL,
-				 &k5_error_bytes,
-				 NULL,
-				 NULL,
-				 &k5_error_blob);
-	if (kret) {
-		return false;
-	}
-	*error_blob = data_blob_talloc(mem_ctx, k5_error_blob.data, k5_error_blob.length);
-	smb_krb5_free_data_contents(kdc->smb_krb5_context->krb5_context,
-				    &k5_error_blob);
-	if (!error_blob->data) {
-		return false;
-	}
-	return true;
-}
-
-/*
-   A user password change
-
-   Return true if there is a valid error packet (or success) formed in
-   the error_blob
-*/
-static bool kpasswdd_change_password(struct kdc_server *kdc,
-				     TALLOC_CTX *mem_ctx,
-				     struct auth_session_info *session_info,
-				     const DATA_BLOB *password,
-				     DATA_BLOB *reply)
-{
-	NTSTATUS status;
-	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
-	enum samPwdChangeReason reject_reason;
-	struct samr_DomInfo1 *dominfo;
-	const char *error_string;
-
-	status = samdb_kpasswd_change_password(mem_ctx,
-					       kdc->task->lp_ctx,
-					       kdc->task->event_ctx,
-					       kdc->samdb,
-					       session_info,
-					       password,
-					       &reject_reason,
-					       &dominfo,
-					       &error_string,
-					       &result);
-	if (!NT_STATUS_IS_OK(status)) {
-		return kpasswd_make_error_reply(mem_ctx,
-						 KRB5_KPASSWD_ACCESSDENIED,
-						 error_string,
-						 reply);
-	}
-
-	return kpasswd_make_pwchange_reply(mem_ctx,
-					   result,
-					   reject_reason,
-					   dominfo,
-					   reply);
-}
-
-static bool kpasswd_process_request(struct kdc_server *kdc,
-				    TALLOC_CTX *mem_ctx,
-				    struct gensec_security *gensec_security,
-				    uint16_t version,
-				    DATA_BLOB *input,
-				    DATA_BLOB *reply)
-{
-	struct auth_session_info *session_info;
-	size_t pw_len;
-
-	if (!NT_STATUS_IS_OK(gensec_session_info(gensec_security,
-						 mem_ctx,
-						 &session_info))) {
-		return kpasswd_make_error_reply(mem_ctx,
-						KRB5_KPASSWD_HARDERROR,
-						"gensec_session_info failed!",
-						reply);
-	}
-
-	switch (version) {
-	case KRB5_KPASSWD_VERS_CHANGEPW:
-	{
-		DATA_BLOB password;
-		if (!convert_string_talloc_handle(mem_ctx, lpcfg_iconv_handle(kdc->task->lp_ctx),
-					       CH_UTF8, CH_UTF16,
-					       (const char *)input->data,
-					       input->length,
-					       (void **)&password.data, &pw_len)) {
-			return false;
-		}
-		password.length = pw_len;
-
-		return kpasswdd_change_password(kdc, mem_ctx, session_info,
-						&password, reply);
-	}
-	case KRB5_KPASSWD_VERS_SETPW:
-	{
-		NTSTATUS status;
-		enum samPwdChangeReason reject_reason = SAM_PWD_CHANGE_NO_ERROR;
-		struct samr_DomInfo1 *dominfo = NULL;
-		struct ldb_context *samdb;
-		krb5_context context = kdc->smb_krb5_context->krb5_context;
-
-		ChangePasswdDataMS chpw;
-		DATA_BLOB password;
-
-		krb5_principal principal;
-		char *set_password_on_princ;
-		struct ldb_dn *set_password_on_dn;
-		bool service_principal_name = false;
-
-		size_t len;
-		int ret;
-
-		ret = decode_ChangePasswdDataMS(input->data, input->length,
-						&chpw, &len);
-		if (ret) {
-			return kpasswd_make_error_reply(mem_ctx,
-							KRB5_KPASSWD_MALFORMED,
-							"failed to decode password change structure",
-							reply);
-		}
-
-		if (!convert_string_talloc_handle(mem_ctx, lpcfg_iconv_handle(kdc->task->lp_ctx),
-					       CH_UTF8, CH_UTF16,
-					       (const char *)chpw.newpasswd.data,
-					       chpw.newpasswd.length,
-					       (void **)&password.data, &pw_len)) {
-			free_ChangePasswdDataMS(&chpw);
-			return false;
-		}
-
-		password.length = pw_len;
-
-		if ((chpw.targname && !chpw.targrealm)
-		    || (!chpw.targname && chpw.targrealm)) {
-			free_ChangePasswdDataMS(&chpw);
-			return kpasswd_make_error_reply(mem_ctx,
-							KRB5_KPASSWD_MALFORMED,
-							"Realm and principal must be both present, or neither present",
-							reply);
-		}
-		if (chpw.targname && chpw.targrealm) {
-			ret = krb5_build_principal_ext(kdc->smb_krb5_context->krb5_context,
-						       &principal,
-						       strlen(*chpw.targrealm),
-						       *chpw.targrealm, 0);
-			if (ret) {
-				free_ChangePasswdDataMS(&chpw);
-				return kpasswd_make_error_reply(mem_ctx,
-								KRB5_KPASSWD_MALFORMED,
-								"failed to get principal",
-								reply);
-			}
-			if (copy_PrincipalName(chpw.targname, &principal->name)) {
-				free_ChangePasswdDataMS(&chpw);
-				krb5_free_principal(context, principal);
-				return kpasswd_make_error_reply(mem_ctx,
-								KRB5_KPASSWD_MALFORMED,
-								"failed to extract principal to set",
-								reply);
-			}
-		} else {
-			free_ChangePasswdDataMS(&chpw);
-			return kpasswdd_change_password(kdc, mem_ctx, session_info,
-							&password, reply);
-		}
-		free_ChangePasswdDataMS(&chpw);
-
-		if (principal->name.name_string.len >= 2) {
-			service_principal_name = true;
-
-			/* We use this, rather than 'no realm' flag,
-			 * as we don't want to accept a password
-			 * change on a principal from another realm */
-
-			if (krb5_unparse_name_short(context, principal, &set_password_on_princ) != 0) {
-				krb5_free_principal(context, principal);
-				return kpasswd_make_error_reply(mem_ctx,
-								 KRB5_KPASSWD_MALFORMED,
-								 "krb5_unparse_name failed!",
-								 reply);
-			}
-		} else {
-			if (krb5_unparse_name(context, principal, &set_password_on_princ) != 0) {
-				krb5_free_principal(context, principal);
-				return kpasswd_make_error_reply(mem_ctx,
-								 KRB5_KPASSWD_MALFORMED,
-								 "krb5_unparse_name failed!",
-								 reply);
-			}
-		}
-		krb5_free_principal(context, principal);
-
-		samdb = samdb_connect(mem_ctx, kdc->task->event_ctx, kdc->task->lp_ctx, session_info, 0);
-		if (!samdb) {
-			free(set_password_on_princ);
-			return kpasswd_make_error_reply(mem_ctx,
-							 KRB5_KPASSWD_HARDERROR,
-							 "Unable to open database!",
-							 reply);
-		}
-
-		DEBUG(3, ("%s\\%s (%s) is changing password of %s\n",
-			  session_info->info->domain_name,
-			  session_info->info->account_name,
-			  dom_sid_string(mem_ctx, &session_info->security_token->sids[PRIMARY_USER_SID_INDEX]),
-			  set_password_on_princ));
-		ret = ldb_transaction_start(samdb);
-		if (ret != LDB_SUCCESS) {
-			free(set_password_on_princ);
-			status = NT_STATUS_TRANSACTION_ABORTED;
-			return kpasswd_make_pwchange_reply(mem_ctx,
-							   status,
-							   SAM_PWD_CHANGE_NO_ERROR,
-							   NULL,
-							   reply);
-		}
-
-		if (service_principal_name) {
-			status = crack_service_principal_name(samdb, mem_ctx,
-							      set_password_on_princ,
-							      &set_password_on_dn, NULL);
-		} else {
-			status = crack_user_principal_name(samdb, mem_ctx,
-							   set_password_on_princ,
-							   &set_password_on_dn, NULL);
-		}
-		free(set_password_on_princ);
-		if (!NT_STATUS_IS_OK(status)) {
-			ldb_transaction_cancel(samdb);
-			return kpasswd_make_pwchange_reply(mem_ctx,
-							   status,
-							   SAM_PWD_CHANGE_NO_ERROR,
-							   NULL,
-							   reply);
-		}
-
-		if (NT_STATUS_IS_OK(status)) {
-			/* Admin password set */
-			status = samdb_set_password(samdb, mem_ctx,
-						    set_password_on_dn, NULL,
-						    &password, NULL, NULL,
-						    NULL, NULL, /* this is not a user password change */
-						    &reject_reason, &dominfo);
-		}
-
-		if (NT_STATUS_IS_OK(status)) {
-			ret = ldb_transaction_commit(samdb);
-			if (ret != LDB_SUCCESS) {
-				DEBUG(1,("Failed to commit transaction to set password on %s: %s\n",
-					 ldb_dn_get_linearized(set_password_on_dn),
-					 ldb_errstring(samdb)));
-				status = NT_STATUS_TRANSACTION_ABORTED;
-			}
-		} else {
-			ldb_transaction_cancel(samdb);
-		}
-		return kpasswd_make_pwchange_reply(mem_ctx,
-						   status,
-						   reject_reason,
-						   dominfo,
-						   reply);
-	}
-	default:
-		return kpasswd_make_error_reply(mem_ctx,
-						 KRB5_KPASSWD_BAD_VERSION,
-						 talloc_asprintf(mem_ctx,
-								 "Protocol version %u not supported",
-								 version),
-						 reply);
-	}
-}
-
-kdc_code kpasswdd_process(struct kdc_server *kdc,
-			  TALLOC_CTX *mem_ctx,
-			  DATA_BLOB *input,
-			  DATA_BLOB *reply,
-			  struct tsocket_address *peer_addr,
-			  struct tsocket_address *my_addr,
-			  int datagram_reply)
-{
-	bool ret;
-	const uint16_t header_len = 6;
-	uint16_t len;
-	uint16_t ap_req_len;
-	uint16_t krb_priv_len;
-	uint16_t version;
-	NTSTATUS nt_status;
-	DATA_BLOB ap_req, krb_priv_req;
-	DATA_BLOB krb_priv_rep = data_blob(NULL, 0);
-	DATA_BLOB ap_rep = data_blob(NULL, 0);
-	DATA_BLOB kpasswd_req, kpasswd_rep;
-	struct cli_credentials *server_credentials;
-	struct gensec_security *gensec_security;
-	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
-
-	char *keytab_name;
-
-	if (!tmp_ctx) {
-		return KDC_ERROR;
-	}
-
-	if (kdc->am_rodc) {
-		talloc_free(tmp_ctx);
-		return KDC_PROXY_REQUEST;
-	}
-
-	/* Be parinoid.  We need to ensure we don't just let the
-	 * caller lead us into a buffer overflow */
-	if (input->length <= header_len) {
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	len = RSVAL(input->data, 0);
-	if (input->length != len) {
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	/* There are two different versions of this protocol so far,
-	 * plus others in the standards pipe.  Fortunetly they all
-	 * take a very similar framing */
-	version = RSVAL(input->data, 2);
-	ap_req_len = RSVAL(input->data, 4);
-	if ((ap_req_len >= len) || (ap_req_len + header_len) >= len) {
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	krb_priv_len = len - ap_req_len;
-	ap_req = data_blob_const(&input->data[header_len], ap_req_len);
-	krb_priv_req = data_blob_const(&input->data[header_len + ap_req_len], krb_priv_len);
-
-	server_credentials = cli_credentials_init(tmp_ctx);
-	if (!server_credentials) {
-		DEBUG(1, ("Failed to init server credentials\n"));
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	/* We want the credentials subsystem to use the krb5 context
-	 * we already have, rather than a new context */
-	cli_credentials_set_krb5_context(server_credentials, kdc->smb_krb5_context);
-	cli_credentials_set_conf(server_credentials, kdc->task->lp_ctx);
-
-	keytab_name = talloc_asprintf(server_credentials, "HDB:samba4&%p", kdc->base_ctx);
-
-	cli_credentials_set_username(server_credentials, "kadmin/changepw", CRED_SPECIFIED);
-	ret = cli_credentials_set_keytab_name(server_credentials, kdc->task->lp_ctx, keytab_name, CRED_SPECIFIED);
-	if (ret != 0) {
-		ret = kpasswdd_make_unauth_error_reply(kdc, mem_ctx,
-						       KRB5_KPASSWD_HARDERROR,
-						       talloc_asprintf(mem_ctx,
-								       "Failed to obtain server credentials for kadmin/changepw!"),
-						       &krb_priv_rep);
-		ap_rep.length = 0;
-		if (ret) {
-			goto reply;
-		}
-		talloc_free(tmp_ctx);
-		return ret;
-	}
-
-	/* We don't strictly need to call this wrapper, and could call
-	 * gensec_server_start directly, as we have no need for NTLM
-	 * and we have a PAC, but this ensures that the wrapper can be
-	 * safely extended for other helpful things in future */
-	nt_status = samba_server_gensec_start(tmp_ctx, kdc->task->event_ctx,
-					      kdc->task->msg_ctx,
-					      kdc->task->lp_ctx,
-					      server_credentials,
-					      "kpasswd",
-					      &gensec_security);
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	/* The kerberos PRIV packets include these addresses.  MIT
-	 * clients check that they are present */
-#if 0
-	/* Skip this part for now, it breaks with a NetAPP filer and
-	 * in any case where the client address is behind NAT.  If
-	 * older MIT clients need this, we might have to insert more
-	 * complex code */
-
-	nt_status = gensec_set_remote_address(gensec_security, peer_addr);
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-#endif
-
-	nt_status = gensec_set_local_address(gensec_security, my_addr);
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	/* We want the GENSEC wrap calls to generate PRIV tokens */
-	gensec_want_feature(gensec_security, GENSEC_FEATURE_SEAL);
-
-	nt_status = gensec_start_mech_by_name(gensec_security, "krb5");
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	/* Accept the AP-REQ and generate teh AP-REP we need for the reply */
-	nt_status = gensec_update_ev(gensec_security, tmp_ctx, kdc->task->event_ctx, ap_req, &ap_rep);
-	if (!NT_STATUS_IS_OK(nt_status) && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
-
-		ret = kpasswdd_make_unauth_error_reply(kdc, mem_ctx,
-						       KRB5_KPASSWD_HARDERROR,
-						       talloc_asprintf(mem_ctx,
-								       "gensec_update failed: %s",
-								       nt_errstr(nt_status)),
-						       &krb_priv_rep);
-		ap_rep.length = 0;
-		if (ret) {
-			goto reply;
-		}
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	/* Extract the data from the KRB-PRIV half of the message */
-	nt_status = gensec_unwrap(gensec_security, tmp_ctx, &krb_priv_req, &kpasswd_req);
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		ret = kpasswdd_make_unauth_error_reply(kdc, mem_ctx,
-						       KRB5_KPASSWD_HARDERROR,
-						       talloc_asprintf(mem_ctx,
-								       "gensec_unwrap failed: %s",
-								       nt_errstr(nt_status)),
-						       &krb_priv_rep);
-		ap_rep.length = 0;
-		if (ret) {
-			goto reply;
-		}
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	/* Figure out something to do with it (probably changing a password...) */
-	ret = kpasswd_process_request(kdc, tmp_ctx,
-				      gensec_security,
-				      version,
-				      &kpasswd_req, &kpasswd_rep);
-	if (!ret) {
-		/* Argh! */
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	/* And wrap up the reply: This ensures that the error message
-	 * or success can be verified by the client */
-	nt_status = gensec_wrap(gensec_security, tmp_ctx,
-				&kpasswd_rep, &krb_priv_rep);
-	if (!NT_STATUS_IS_OK(nt_status)) {
-		ret = kpasswdd_make_unauth_error_reply(kdc, mem_ctx,
-						       KRB5_KPASSWD_HARDERROR,
-						       talloc_asprintf(mem_ctx,
-								       "gensec_wrap failed: %s",
-								       nt_errstr(nt_status)),
-						       &krb_priv_rep);
-		ap_rep.length = 0;
-		if (ret) {
-			goto reply;
-		}
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-reply:
-	*reply = data_blob_talloc(mem_ctx, NULL, krb_priv_rep.length + ap_rep.length + header_len);
-	if (!reply->data) {
-		talloc_free(tmp_ctx);
-		return KDC_ERROR;
-	}
-
-	RSSVAL(reply->data, 0, reply->length);
-	RSSVAL(reply->data, 2, 1); /* This is a version 1 reply, MS change/set or otherwise */
-	RSSVAL(reply->data, 4, ap_rep.length);
-	memcpy(reply->data + header_len,
-	       ap_rep.data,
-	       ap_rep.length);
-	memcpy(reply->data + header_len + ap_rep.length,
-	       krb_priv_rep.data,
-	       krb_priv_rep.length);
-
-	talloc_free(tmp_ctx);
-	return KDC_OK;
-}