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-rw-r--r--lib/krb5_wrap/enctype_convert.c108
-rw-r--r--lib/krb5_wrap/gss_samba.c222
-rw-r--r--lib/krb5_wrap/gss_samba.h49
-rw-r--r--lib/krb5_wrap/keytab_util.c65
-rw-r--r--lib/krb5_wrap/krb5_errs.c115
-rw-r--r--lib/krb5_wrap/krb5_samba.c4043
-rw-r--r--lib/krb5_wrap/krb5_samba.h443
-rw-r--r--lib/krb5_wrap/wscript_build23
-rw-r--r--lib/krb5_wrap/wscript_configure18
9 files changed, 5086 insertions, 0 deletions
diff --git a/lib/krb5_wrap/enctype_convert.c b/lib/krb5_wrap/enctype_convert.c
new file mode 100644
index 0000000..4a64435
--- /dev/null
+++ b/lib/krb5_wrap/enctype_convert.c
@@ -0,0 +1,108 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Kerberos utility functions
+
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2012
+
+ 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 "krb5_samba.h"
+#include "librpc/gen_ndr/netlogon.h"
+
+const krb5_enctype *samba_all_enctypes(void)
+{
+ /* TODO: Find a way not to have to use a fixed list */
+ static const krb5_enctype enctypes[] = {
+ ENCTYPE_DES_CBC_CRC,
+ ENCTYPE_DES_CBC_MD5,
+ ENCTYPE_AES128_CTS_HMAC_SHA1_96,
+ ENCTYPE_AES256_CTS_HMAC_SHA1_96,
+ ENCTYPE_ARCFOUR_HMAC,
+ 0
+ };
+ return enctypes;
+};
+
+/* Translate between the IETF encryption type values and the Microsoft
+ * msDS-SupportedEncryptionTypes values */
+uint32_t kerberos_enctype_to_bitmap(krb5_enctype enc_type_enum)
+{
+ switch (enc_type_enum) {
+ case ENCTYPE_DES_CBC_CRC:
+ return ENC_CRC32;
+ case ENCTYPE_DES_CBC_MD5:
+ return ENC_RSA_MD5;
+ case ENCTYPE_ARCFOUR_HMAC:
+ return ENC_RC4_HMAC_MD5;
+ case ENCTYPE_AES128_CTS_HMAC_SHA1_96:
+ return ENC_HMAC_SHA1_96_AES128;
+ case ENCTYPE_AES256_CTS_HMAC_SHA1_96:
+ return ENC_HMAC_SHA1_96_AES256;
+ default:
+ return 0;
+ }
+}
+
+/* Translate between the Microsoft msDS-SupportedEncryptionTypes values
+ * and the IETF encryption type values */
+krb5_enctype ms_suptype_to_ietf_enctype(uint32_t enctype_bitmap)
+{
+ switch (enctype_bitmap) {
+ case ENC_CRC32:
+ return ENCTYPE_DES_CBC_CRC;
+ case ENC_RSA_MD5:
+ return ENCTYPE_DES_CBC_MD5;
+ case ENC_RC4_HMAC_MD5:
+ return ENCTYPE_ARCFOUR_HMAC;
+ case ENC_HMAC_SHA1_96_AES128:
+ return ENCTYPE_AES128_CTS_HMAC_SHA1_96;
+ case ENC_HMAC_SHA1_96_AES256:
+ return ENCTYPE_AES256_CTS_HMAC_SHA1_96;
+ default:
+ return 0;
+ }
+}
+
+/* Return an array of krb5_enctype values */
+krb5_error_code ms_suptypes_to_ietf_enctypes(TALLOC_CTX *mem_ctx,
+ uint32_t enctype_bitmap,
+ krb5_enctype **enctypes)
+{
+ size_t max_bits = 8 * sizeof(enctype_bitmap);
+ size_t j = 0;
+ ssize_t i;
+
+ *enctypes = talloc_zero_array(mem_ctx, krb5_enctype,
+ max_bits + 1);
+ if (!*enctypes) {
+ return ENOMEM;
+ }
+
+ for (i = max_bits - 1; i >= 0; i--) {
+ uint32_t bit_value = (1U << i) & enctype_bitmap;
+ if (bit_value & enctype_bitmap) {
+ (*enctypes)[j] = ms_suptype_to_ietf_enctype(bit_value);
+ if (!(*enctypes)[j]) {
+ continue;
+ }
+ j++;
+ }
+ }
+ (*enctypes)[j] = 0;
+ return 0;
+}
diff --git a/lib/krb5_wrap/gss_samba.c b/lib/krb5_wrap/gss_samba.c
new file mode 100644
index 0000000..a594056
--- /dev/null
+++ b/lib/krb5_wrap/gss_samba.c
@@ -0,0 +1,222 @@
+/*
+ * Unix SMB/CIFS implementation.
+ *
+ * Simple GSSAPI wrappers
+ *
+ * Copyright (c) 2012 Andreas Schneider <asn@samba.org>
+ *
+ * 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 "gss_samba.h"
+
+#ifdef HAVE_GSSAPI
+
+#if !defined(HAVE_GSS_OID_EQUAL)
+int smb_gss_oid_equal(const gss_OID first_oid, const gss_OID second_oid)
+{
+ if (first_oid == GSS_C_NO_OID || second_oid == GSS_C_NO_OID) {
+ return 0;
+ }
+
+ if (first_oid == second_oid) {
+ return 1;
+ }
+
+ if ((first_oid)->length != (second_oid)->length) {
+ return 0;
+ }
+
+ if (memcmp((first_oid)->elements, (second_oid)->elements,
+ (first_oid)->length) == 0) {
+ return 1;
+ }
+
+ return 0;
+}
+#endif /* !HAVE_GSS_OID_EQUAL */
+
+
+/* wrapper around gss_krb5_import_cred() that prefers to use gss_acquire_cred_from()
+ * if this GSSAPI extension is available. gss_acquire_cred_from() is properly
+ * interposed by GSSPROXY while gss_krb5_import_cred() is not.
+ *
+ * This wrapper requires a proper krb5_context to resolve ccache name.
+ * All gss_krb5_import_cred() callers in Samba already have krb5_context available. */
+uint32_t smb_gss_krb5_import_cred(uint32_t *minor_status, krb5_context ctx,
+ krb5_ccache id, krb5_principal keytab_principal,
+ krb5_keytab keytab, gss_cred_id_t *cred)
+{
+ uint32_t major_status = 0;
+
+#ifdef HAVE_GSS_ACQUIRE_CRED_FROM
+ uint32_t minor = 0;
+ gss_key_value_element_desc ccache_element = {
+ .key = "ccache",
+ .value = NULL,
+ };
+
+ gss_key_value_element_desc keytab_element = {
+ .key = "keytab",
+ .value = NULL,
+ };
+
+ gss_key_value_element_desc elements[2];
+
+ gss_key_value_set_desc cred_store = {
+ .elements = &ccache_element,
+ .count = 1,
+ };
+
+ /* we are interested exclusively in krb5 credentials,
+ * indicate to GSSAPI that we are not interested in any other
+ * mechanism here */
+ gss_OID_set_desc mech_set = {
+ .count = 1,
+ .elements = discard_const_p(struct gss_OID_desc_struct,
+ gss_mech_krb5),
+ };
+
+ gss_cred_usage_t cred_usage = GSS_C_INITIATE;
+ gss_name_t name = NULL;
+ gss_buffer_desc pr_name = {
+ .value = NULL,
+ .length = 0,
+ };
+
+ if (id != NULL) {
+ major_status = krb5_cc_get_full_name(ctx,
+ id,
+ discard_const(&ccache_element.value));
+ if (major_status != 0) {
+ return major_status;
+ }
+ }
+
+ if (keytab != NULL) {
+ keytab_element.value = malloc(4096);
+ if (!keytab_element.value) {
+ return ENOMEM;
+ }
+ major_status = krb5_kt_get_name(ctx,
+ keytab,
+ discard_const(keytab_element.value), 4096);
+ if (major_status != 0) {
+ free(discard_const(keytab_element.value));
+ return major_status;
+ }
+ cred_usage = GSS_C_ACCEPT;
+ cred_store.elements = &keytab_element;
+
+ if (keytab_principal != NULL) {
+ major_status = krb5_unparse_name(ctx, keytab_principal, (char**)&pr_name.value);
+ if (major_status != 0) {
+ free(discard_const(keytab_element.value));
+ return major_status;
+ }
+ pr_name.length = strlen(pr_name.value);
+
+ major_status = gss_import_name(minor_status,
+ &pr_name,
+ discard_const(GSS_KRB5_NT_PRINCIPAL_NAME),
+ &name);
+ if (major_status != 0) {
+ krb5_free_unparsed_name(ctx, pr_name.value);
+ free(discard_const(keytab_element.value));
+ return major_status;
+ }
+ }
+ }
+
+ if (id != NULL && keytab != NULL) {
+ elements[0] = ccache_element;
+ elements[1] = keytab_element;
+
+ cred_store.elements = elements;
+ cred_store.count = 2;
+ cred_usage = GSS_C_BOTH;
+ }
+
+ major_status = gss_acquire_cred_from(minor_status,
+ name,
+ 0,
+ &mech_set,
+ cred_usage,
+ &cred_store,
+ cred,
+ NULL,
+ NULL);
+
+ if (pr_name.value != NULL) {
+ (void)gss_release_name(&minor, &name);
+ krb5_free_unparsed_name(ctx, pr_name.value);
+ }
+ if (keytab_element.value != NULL) {
+ free(discard_const(keytab_element.value));
+ }
+ krb5_free_string(ctx, discard_const(ccache_element.value));
+#else
+ major_status = gss_krb5_import_cred(minor_status,
+ id,
+ keytab_principal,
+ keytab, cred);
+
+ if (major_status == (GSS_S_CALL_BAD_STRUCTURE|GSS_S_BAD_NAME)) {
+ if ((keytab_principal == NULL) && (keytab != NULL)) {
+ /* No principal was specified and MIT krb5 1.9 version failed.
+ * We have to fall back to set global acceptor identity */
+ gss_OID_set_desc mech_set;
+ char *kt_name = NULL;
+
+ kt_name = malloc(4096);
+ if (!kt_name) {
+ return ENOMEM;
+ }
+
+ major_status = krb5_kt_get_name(ctx,
+ keytab,
+ kt_name, 4096);
+ if (major_status != 0) {
+ free(kt_name);
+ return major_status;
+ }
+
+ major_status = gsskrb5_register_acceptor_identity(kt_name);
+ if (major_status) {
+ free(kt_name);
+ return major_status;
+ }
+
+ /* We are dealing with krb5 GSSAPI mech in this fallback */
+ mech_set.count = 1;
+ mech_set.elements =
+ discard_const_p(struct gss_OID_desc_struct,
+ gss_mech_krb5);
+ major_status = gss_acquire_cred(minor_status,
+ GSS_C_NO_NAME,
+ GSS_C_INDEFINITE,
+ &mech_set,
+ GSS_C_ACCEPT,
+ cred,
+ NULL, NULL);
+ free(kt_name);
+ }
+ }
+#endif
+ return major_status;
+}
+
+
+#endif /* HAVE_GSSAPI */
diff --git a/lib/krb5_wrap/gss_samba.h b/lib/krb5_wrap/gss_samba.h
new file mode 100644
index 0000000..89aee34
--- /dev/null
+++ b/lib/krb5_wrap/gss_samba.h
@@ -0,0 +1,49 @@
+/*
+ * Unix SMB/CIFS implementation.
+ *
+ * Simple GSSAPI wrappers
+ *
+ * Copyright (c) 2012 Andreas Schneider <asn@samba.org>
+ *
+ * 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/>.
+ */
+
+#ifndef _GSS_SAMBA_H
+#define _GSS_SAMBA_H
+
+#ifdef HAVE_GSSAPI
+
+#include "system/gssapi.h"
+#include "krb5_samba.h"
+
+#if defined(HAVE_GSS_OID_EQUAL)
+#define smb_gss_oid_equal gss_oid_equal
+#else
+int smb_gss_oid_equal(const gss_OID first_oid, const gss_OID second_oid);
+#endif /* HAVE_GSS_OID_EQUAL */
+
+/* wrapper around gss_krb5_import_cred() that prefers to use gss_acquire_cred_from()
+ * if this GSSAPI extension is available. gss_acquire_cred_from() is properly
+ * interposed by GSS-proxy while gss_krb5_import_cred() is not.
+ *
+ * This wrapper requires a proper krb5_context to resolve the ccache name for
+ * gss_acquire_cred_from().
+ *
+ * All gss_krb5_import_cred() callers in Samba already have krb5_context available. */
+uint32_t smb_gss_krb5_import_cred(OM_uint32 *minor_status, krb5_context ctx,
+ krb5_ccache id, krb5_principal keytab_principal,
+ krb5_keytab keytab, gss_cred_id_t *cred);
+
+#endif /* HAVE_GSSAPI */
+#endif /* _GSS_SAMBA_H */
diff --git a/lib/krb5_wrap/keytab_util.c b/lib/krb5_wrap/keytab_util.c
new file mode 100644
index 0000000..ba8a79c
--- /dev/null
+++ b/lib/krb5_wrap/keytab_util.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * Copyright (c) 2011 Andrew Bartlett
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "includes.h"
+#include "krb5_samba.h"
+
+#if !defined(HAVE_KRB5_KT_COMPARE)
+krb5_boolean smb_krb5_kt_compare(krb5_context context,
+ krb5_keytab_entry *entry,
+ krb5_const_principal principal,
+ krb5_kvno kvno,
+ krb5_enctype enctype)
+{
+ if (principal) {
+ if (!krb5_principal_compare(context,
+ entry->principal, principal)) {
+ return false;
+ }
+ }
+ if (kvno) {
+ if (entry->vno != kvno) {
+ return false;
+ }
+ }
+ if (enctype) {
+ if (KRB5_KEY_TYPE(KRB5_KT_KEY(entry)) != enctype) {
+ return false;
+ }
+ }
+
+ return true;
+}
+#endif
diff --git a/lib/krb5_wrap/krb5_errs.c b/lib/krb5_wrap/krb5_errs.c
new file mode 100644
index 0000000..d602b61
--- /dev/null
+++ b/lib/krb5_wrap/krb5_errs.c
@@ -0,0 +1,115 @@
+/*
+ * Unix SMB/CIFS implementation.
+ * Kerberos error mapping functions
+ * Copyright (C) Guenther Deschner 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 "krb5_samba.h"
+
+#ifdef HAVE_KRB5
+
+static const struct {
+ krb5_error_code krb5_code;
+ NTSTATUS ntstatus;
+} krb5_to_nt_status_map[] = {
+ {KRB5_CC_IO, NT_STATUS_UNEXPECTED_IO_ERROR},
+ {KRB5KDC_ERR_BADOPTION, NT_STATUS_INVALID_PARAMETER},
+ {KRB5KDC_ERR_CLIENT_REVOKED, NT_STATUS_ACCOUNT_LOCKED_OUT},
+ {KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN, NT_STATUS_INVALID_ACCOUNT_NAME},
+ {KRB5KDC_ERR_ETYPE_NOSUPP, NT_STATUS_LOGON_FAILURE},
+#if defined(KRB5KDC_ERR_KEY_EXP) /* MIT */
+ {KRB5KDC_ERR_KEY_EXP, NT_STATUS_PASSWORD_EXPIRED},
+#else /* old Heimdal releases have it with different name only in an enum: */
+ {KRB5KDC_ERR_KEY_EXPIRED, NT_STATUS_PASSWORD_EXPIRED},
+#endif
+ {25, NT_STATUS_PASSWORD_EXPIRED}, /* FIXME: bug in heimdal 0.7 krb5_get_init_creds_password (Inappropriate ioctl for device (25)) */
+ {KRB5KDC_ERR_NULL_KEY, NT_STATUS_LOGON_FAILURE},
+ {KRB5KDC_ERR_POLICY, NT_STATUS_INVALID_WORKSTATION},
+ {KRB5KDC_ERR_PREAUTH_FAILED, NT_STATUS_LOGON_FAILURE},
+ {KRB5KDC_ERR_SERVICE_REVOKED, NT_STATUS_ACCESS_DENIED},
+ {KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN, NT_STATUS_INVALID_COMPUTER_NAME},
+ {KRB5KDC_ERR_SUMTYPE_NOSUPP, NT_STATUS_LOGON_FAILURE},
+ {KRB5KDC_ERR_TGT_REVOKED, NT_STATUS_ACCESS_DENIED},
+ {KRB5_KDC_UNREACH, NT_STATUS_NO_LOGON_SERVERS},
+ {KRB5KRB_AP_ERR_BAD_INTEGRITY, NT_STATUS_LOGON_FAILURE},
+ {KRB5KRB_AP_ERR_MODIFIED, NT_STATUS_LOGON_FAILURE},
+ {KRB5KRB_AP_ERR_SKEW, NT_STATUS_TIME_DIFFERENCE_AT_DC},
+ {KRB5_KDCREP_SKEW, NT_STATUS_TIME_DIFFERENCE_AT_DC},
+ {KRB5KRB_AP_ERR_TKT_EXPIRED, NT_STATUS_LOGON_FAILURE},
+ {KRB5KRB_ERR_GENERIC, NT_STATUS_UNSUCCESSFUL},
+#if defined(KRB5KRB_ERR_RESPONSE_TOO_BIG)
+ {KRB5KRB_ERR_RESPONSE_TOO_BIG, NT_STATUS_PROTOCOL_UNREACHABLE},
+#endif
+ {KRB5_CC_NOTFOUND, NT_STATUS_NO_SUCH_FILE},
+ {KRB5_FCC_NOFILE, NT_STATUS_NO_SUCH_FILE},
+ {KRB5_RC_MALLOC, NT_STATUS_NO_MEMORY},
+ {ENOMEM, NT_STATUS_NO_MEMORY},
+ {KRB5_REALM_CANT_RESOLVE, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND},
+ {KRB5_REALM_UNKNOWN, NT_STATUS_NO_SUCH_DOMAIN},
+
+ /* Must be last entry */
+ {KRB5KDC_ERR_NONE, NT_STATUS_OK}
+};
+
+static const struct {
+ NTSTATUS ntstatus;
+ krb5_error_code krb5_code;
+} nt_status_to_krb5_map[] = {
+ {NT_STATUS_LOGON_FAILURE, KRB5KDC_ERR_PREAUTH_FAILED},
+ {NT_STATUS_NO_LOGON_SERVERS, KRB5_KDC_UNREACH},
+ {NT_STATUS_OK, 0}
+};
+
+/*****************************************************************************
+convert a KRB5 error to a NT status32 code
+ *****************************************************************************/
+ NTSTATUS krb5_to_nt_status(krb5_error_code kerberos_error)
+{
+ int i;
+
+ if (kerberos_error == 0) {
+ return NT_STATUS_OK;
+ }
+
+ for (i=0; NT_STATUS_V(krb5_to_nt_status_map[i].ntstatus); i++) {
+ if (kerberos_error == krb5_to_nt_status_map[i].krb5_code)
+ return krb5_to_nt_status_map[i].ntstatus;
+ }
+
+ return NT_STATUS_UNSUCCESSFUL;
+}
+
+/*****************************************************************************
+convert an NT status32 code to a KRB5 error
+ *****************************************************************************/
+ krb5_error_code nt_status_to_krb5(NTSTATUS nt_status)
+{
+ int i;
+
+ if NT_STATUS_IS_OK(nt_status) {
+ return 0;
+ }
+
+ for (i=0; NT_STATUS_V(nt_status_to_krb5_map[i].ntstatus); i++) {
+ if (NT_STATUS_EQUAL(nt_status,nt_status_to_krb5_map[i].ntstatus))
+ return nt_status_to_krb5_map[i].krb5_code;
+ }
+
+ return KRB5KRB_ERR_GENERIC;
+}
+
+#endif
diff --git a/lib/krb5_wrap/krb5_samba.c b/lib/krb5_wrap/krb5_samba.c
new file mode 100644
index 0000000..116f916
--- /dev/null
+++ b/lib/krb5_wrap/krb5_samba.c
@@ -0,0 +1,4043 @@
+/*
+ Unix SMB/CIFS implementation.
+ simple kerberos5 routines for active directory
+ Copyright (C) Andrew Tridgell 2001
+ Copyright (C) Luke Howard 2002-2003
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
+ Copyright (C) Guenther Deschner 2005-2009
+
+ 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 "system/filesys.h"
+#include "krb5_samba.h"
+#include "lib/crypto/md4.h"
+#include "../libds/common/flags.h"
+
+#ifdef HAVE_COM_ERR_H
+#include <com_err.h>
+#endif /* HAVE_COM_ERR_H */
+
+#ifndef KRB5_AUTHDATA_WIN2K_PAC
+#define KRB5_AUTHDATA_WIN2K_PAC 128
+#endif
+
+#ifndef KRB5_AUTHDATA_IF_RELEVANT
+#define KRB5_AUTHDATA_IF_RELEVANT 1
+#endif
+
+#ifdef HAVE_KRB5
+
+#define GSSAPI_CHECKSUM 0x8003 /* Checksum type value for Kerberos */
+#define GSSAPI_BNDLENGTH 16 /* Bind Length (rfc-1964 pg.3) */
+#define GSSAPI_CHECKSUM_SIZE (4+GSSAPI_BNDLENGTH+4) /* Length of bind length,
+ bind field, flags field. */
+#define GSS_C_DELEG_FLAG 1
+
+/* MIT krb5 1.7beta3 (in Ubuntu Karmic) is missing the prototype,
+ but still has the symbol */
+#if !HAVE_DECL_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE
+krb5_error_code krb5_auth_con_set_req_cksumtype(
+ krb5_context context,
+ krb5_auth_context auth_context,
+ krb5_cksumtype cksumtype);
+#endif
+
+#if !defined(SMB_MALLOC)
+#undef malloc
+#define SMB_MALLOC(s) malloc((s))
+#endif
+
+#ifndef SMB_STRDUP
+#define SMB_STRDUP(s) strdup(s)
+#endif
+
+/**********************************************************
+ * MISSING FUNCTIONS
+ **********************************************************/
+
+#if !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
+
+#if defined(HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES)
+
+/* With MIT kerberos, we should use krb5_set_default_tgs_enctypes in preference
+ * to krb5_set_default_tgs_ktypes. See
+ * http://lists.samba.org/archive/samba-technical/2006-July/048271.html
+ *
+ * If the MIT libraries are not exporting internal symbols, we will end up in
+ * this branch, which is correct. Otherwise we will continue to use the
+ * internal symbol
+ */
+ krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
+{
+ return krb5_set_default_tgs_enctypes(ctx, enc);
+}
+
+#elif defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES)
+
+/* Heimdal */
+ krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc)
+{
+ return krb5_set_default_in_tkt_etypes(ctx, enc);
+}
+
+#endif /* HAVE_KRB5_SET_DEFAULT_TGS_ENCTYPES */
+
+#endif /* HAVE_KRB5_SET_DEFAULT_TGS_KTYPES */
+
+
+#if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
+krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context,
+ krb5_auth_context auth_context,
+ krb5_keyblock *keyblock)
+{
+ return krb5_auth_con_setkey(context, auth_context, keyblock);
+}
+#endif
+
+#if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
+void krb5_free_unparsed_name(krb5_context context, char *val)
+{
+ SAFE_FREE(val);
+}
+#endif
+
+#if !defined(HAVE_KRB5_FREE_ENCTYPES)
+void krb5_free_enctypes(krb5_context context, krb5_enctype *val) {
+ krb5_xfree(val);
+}
+#endif
+
+#if !defined(HAVE_KRB5_FREE_STRING)
+void krb5_free_string(krb5_context context, char *val) {
+ SAFE_FREE(val);
+}
+#endif
+
+krb5_error_code smb_krb5_princ_component(krb5_context context,
+ krb5_const_principal principal,
+ int i,
+ krb5_data *data);
+krb5_error_code smb_krb5_princ_component(krb5_context context,
+ krb5_const_principal principal,
+ int i,
+ krb5_data *data)
+{
+#if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
+ const char *component = NULL;
+
+ if (i < 0) {
+ return EINVAL;
+ }
+
+ component = krb5_principal_get_comp_string(context, principal, i);
+ if (component == NULL) {
+ return ENOENT;
+ }
+
+ *data = smb_krb5_make_data(discard_const_p(char, component), strlen(component));
+
+ return 0;
+#else
+ const krb5_data *kdata = NULL;
+
+ if (i < 0) {
+ return EINVAL;
+ }
+
+ kdata = krb5_princ_component(context, principal, i);
+ if (kdata == NULL) {
+ return ENOENT;
+ }
+
+ *data = *kdata;
+
+ return 0;
+#endif
+}
+
+/**********************************************************
+ * WRAPPING FUNCTIONS
+ **********************************************************/
+
+/**
+ * @brief Stores the address of a 'struct sockaddr_storage' into a krb5_address
+ *
+ * @param[in] paddr A pointer to a 'struct sockaddr_storage to extract the
+ * address from.
+ *
+ * @param[out] pkaddr A Kerberos address to store the address in.
+ *
+ * @return True on success, false if an error occurred.
+ */
+bool smb_krb5_sockaddr_to_kaddr(struct sockaddr_storage *paddr,
+ krb5_address *pkaddr)
+{
+ memset(pkaddr, '\0', sizeof(krb5_address));
+#if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
+/* HEIMDAL */
+#ifdef HAVE_IPV6
+ if (paddr->ss_family == AF_INET6) {
+ pkaddr->addr_type = KRB5_ADDRESS_INET6;
+ pkaddr->address.length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
+ pkaddr->address.data = (char *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
+ return true;
+ }
+#endif
+ if (paddr->ss_family == AF_INET) {
+ pkaddr->addr_type = KRB5_ADDRESS_INET;
+ pkaddr->address.length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
+ pkaddr->address.data = (char *)&(((struct sockaddr_in *)paddr)->sin_addr);
+ return true;
+ }
+#elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
+/* MIT */
+#ifdef HAVE_IPV6
+ if (paddr->ss_family == AF_INET6) {
+ pkaddr->addrtype = ADDRTYPE_INET6;
+ pkaddr->length = sizeof(((struct sockaddr_in6 *)paddr)->sin6_addr);
+ pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in6 *)paddr)->sin6_addr);
+ return true;
+ }
+#endif
+ if (paddr->ss_family == AF_INET) {
+ pkaddr->addrtype = ADDRTYPE_INET;
+ pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
+ pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
+ return true;
+ }
+#else
+#error UNKNOWN_ADDRTYPE
+#endif
+ return false;
+}
+
+krb5_error_code smb_krb5_mk_error(krb5_context context,
+ krb5_error_code error_code,
+ const char *e_text,
+ krb5_data *e_data,
+ const krb5_principal client,
+ const krb5_principal server,
+ krb5_data *enc_err)
+{
+ krb5_error_code code = EINVAL;
+#ifdef SAMBA4_USES_HEIMDAL
+ code = krb5_mk_error(context,
+ error_code,
+ e_text,
+ e_data,
+ client,
+ server,
+ NULL, /* client_time */
+ NULL, /* client_usec */
+ enc_err);
+#else
+ krb5_principal unspec_server = NULL;
+ krb5_error errpkt;
+
+ errpkt.ctime = 0;
+ errpkt.cusec = 0;
+
+ code = krb5_us_timeofday(context,
+ &errpkt.stime,
+ &errpkt.susec);
+ if (code != 0) {
+ return code;
+ }
+
+ errpkt.error = error_code - ERROR_TABLE_BASE_krb5;
+
+ errpkt.text.length = 0;
+ if (e_text != NULL) {
+ errpkt.text = smb_krb5_make_data(discard_const_p(char, e_text), strlen(e_text));
+ }
+
+ errpkt.e_data = smb_krb5_make_data(NULL, 0);
+ if (e_data != NULL) {
+ errpkt.e_data = *e_data;
+ }
+
+ errpkt.client = client;
+
+ if (server != NULL) {
+ errpkt.server = server;
+ } else {
+ code = smb_krb5_make_principal(context,
+ &unspec_server,
+ "<unspecified realm>",
+ NULL);
+ if (code != 0) {
+ return code;
+ }
+ errpkt.server = unspec_server;
+ }
+
+ code = krb5_mk_error(context,
+ &errpkt,
+ enc_err);
+ krb5_free_principal(context, unspec_server);
+#endif
+ return code;
+}
+
+/**
+* @brief Create a keyblock based on input parameters
+*
+* @param context The krb5_context
+* @param host_princ The krb5_principal to use
+* @param salt The optional salt, if omitted, salt is calculated with
+* the provided principal.
+* @param password The krb5_data containing the password
+* @param enctype The krb5_enctype to use for the keyblock generation
+* @param key The returned krb5_keyblock, caller needs to free with
+* krb5_free_keyblock().
+*
+* @return krb5_error_code
+*/
+int smb_krb5_create_key_from_string(krb5_context context,
+ krb5_const_principal host_princ,
+ const krb5_data *salt,
+ const krb5_data *password,
+ krb5_enctype enctype,
+ krb5_keyblock *key)
+{
+ int ret = 0;
+
+ if (host_princ == NULL && salt == NULL) {
+ return -1;
+ }
+
+ if ((int)enctype == (int)ENCTYPE_ARCFOUR_HMAC) {
+ TALLOC_CTX *frame = talloc_stackframe();
+ uint8_t *utf16 = NULL;
+ size_t utf16_size = 0;
+ uint8_t nt_hash[16];
+ bool ok;
+
+ ok = convert_string_talloc(frame, CH_UNIX, CH_UTF16LE,
+ password->data, password->length,
+ &utf16, &utf16_size);
+ if (!ok) {
+ if (errno == 0) {
+ errno = EINVAL;
+ }
+ ret = errno;
+ TALLOC_FREE(frame);
+ return ret;
+ }
+
+ mdfour(nt_hash, utf16, utf16_size);
+ BURN_PTR_SIZE(utf16, utf16_size);
+ ret = smb_krb5_keyblock_init_contents(context,
+ ENCTYPE_ARCFOUR_HMAC,
+ nt_hash,
+ sizeof(nt_hash),
+ key);
+ ZERO_STRUCT(nt_hash);
+ if (ret != 0) {
+ TALLOC_FREE(frame);
+ return ret;
+ }
+
+ TALLOC_FREE(frame);
+ return 0;
+ }
+
+#if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_C_STRING_TO_KEY)
+{/* MIT */
+ krb5_data _salt;
+
+ if (salt == NULL) {
+ ret = krb5_principal2salt(context, host_princ, &_salt);
+ if (ret) {
+ DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
+ return ret;
+ }
+ } else {
+ _salt = *salt;
+ }
+ ret = krb5_c_string_to_key(context, enctype, password, &_salt, key);
+ if (salt == NULL) {
+ SAFE_FREE(_salt.data);
+ }
+}
+#elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
+{/* Heimdal */
+ krb5_salt _salt;
+
+ if (salt == NULL) {
+ ret = krb5_get_pw_salt(context, host_princ, &_salt);
+ if (ret) {
+ DEBUG(1,("krb5_get_pw_salt failed (%s)\n", error_message(ret)));
+ return ret;
+ }
+ } else {
+ _salt.saltvalue = *salt;
+ _salt.salttype = KRB5_PW_SALT;
+ }
+
+ ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, _salt, key);
+ if (salt == NULL) {
+ krb5_free_salt(context, _salt);
+ }
+}
+#else
+#error UNKNOWN_CREATE_KEY_FUNCTIONS
+#endif
+ return ret;
+}
+
+/**
+* @brief Create a salt for a given principal
+*
+* @param context The initialized krb5_context
+* @param host_princ The krb5_principal to create the salt for
+* @param psalt A pointer to a krb5_data struct
+*
+* caller has to free the contents of psalt with smb_krb5_free_data_contents
+* when function has succeeded
+*
+* @return krb5_error_code, returns 0 on success, error code otherwise
+*/
+
+int smb_krb5_get_pw_salt(krb5_context context,
+ krb5_const_principal host_princ,
+ krb5_data *psalt)
+#if defined(HAVE_KRB5_GET_PW_SALT)
+/* Heimdal */
+{
+ int ret;
+ krb5_salt salt;
+
+ ret = krb5_get_pw_salt(context, host_princ, &salt);
+ if (ret) {
+ return ret;
+ }
+
+ *psalt = salt.saltvalue;
+
+ return ret;
+}
+#elif defined(HAVE_KRB5_PRINCIPAL2SALT)
+/* MIT */
+{
+ return krb5_principal2salt(context, host_princ, psalt);
+}
+#else
+#error UNKNOWN_SALT_FUNCTIONS
+#endif
+
+/**
+ * @brief This constructs the salt principal used by active directory
+ *
+ * Most Kerberos encryption types require a salt in order to
+ * calculate the long term private key for user/computer object
+ * based on a password.
+ *
+ * The returned _salt_principal is a string in forms like this:
+ * - host/somehost.example.com@EXAMPLE.COM
+ * - SomeAccount@EXAMPLE.COM
+ * - SomePrincipal@EXAMPLE.COM
+ *
+ * This is not the form that's used as salt, it's just
+ * the human readable form. It needs to be converted by
+ * smb_krb5_salt_principal2data().
+ *
+ * @param[in] realm The realm the user/computer is added too.
+ *
+ * @param[in] sAMAccountName The sAMAccountName attribute of the object.
+ *
+ * @param[in] userPrincipalName The userPrincipalName attribute of the object
+ * or NULL if not available.
+ *
+ * @param[in] uac_flags UF_ACCOUNT_TYPE_MASKed userAccountControl field
+ *
+ * @param[in] mem_ctx The TALLOC_CTX to allocate _salt_principal.
+ *
+ * @param[out] _salt_principal The resulting principal as string.
+ *
+ * @retval 0 Success; otherwise - Kerberos error codes
+ *
+ * @see smb_krb5_salt_principal2data
+ */
+int smb_krb5_salt_principal(krb5_context krb5_ctx,
+ const char *realm,
+ const char *sAMAccountName,
+ const char *userPrincipalName,
+ uint32_t uac_flags,
+ krb5_principal *salt_princ)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ char *upper_realm = NULL;
+ const char *principal = NULL;
+ int principal_len = 0;
+ krb5_error_code krb5_ret;
+
+ *salt_princ = NULL;
+
+ if (sAMAccountName == NULL) {
+ TALLOC_FREE(frame);
+ return EINVAL;
+ }
+
+ if (realm == NULL) {
+ TALLOC_FREE(frame);
+ return EINVAL;
+ }
+
+ if (uac_flags & ~UF_ACCOUNT_TYPE_MASK) {
+ /*
+ * catch callers which still
+ * pass 'true'.
+ */
+ TALLOC_FREE(frame);
+ return EINVAL;
+ }
+ if (uac_flags == 0) {
+ /*
+ * catch callers which still
+ * pass 'false'.
+ */
+ TALLOC_FREE(frame);
+ return EINVAL;
+ }
+
+ upper_realm = strupper_talloc(frame, realm);
+ if (upper_realm == NULL) {
+ TALLOC_FREE(frame);
+ return ENOMEM;
+ }
+
+ /* Many, many thanks to lukeh@padl.com for this
+ * algorithm, described in his Nov 10 2004 mail to
+ * samba-technical@lists.samba.org */
+
+ /*
+ * Determine a salting principal
+ */
+ if (uac_flags & UF_TRUST_ACCOUNT_MASK) {
+ int computer_len = 0;
+
+ computer_len = strlen(sAMAccountName);
+ if (sAMAccountName[computer_len-1] == '$') {
+ computer_len -= 1;
+ }
+
+ if (uac_flags & UF_INTERDOMAIN_TRUST_ACCOUNT) {
+ const char *krbtgt = "krbtgt";
+ krb5_ret = krb5_build_principal_ext(krb5_ctx,
+ salt_princ,
+ strlen(upper_realm),
+ upper_realm,
+ strlen(krbtgt),
+ krbtgt,
+ computer_len,
+ sAMAccountName,
+ 0);
+ if (krb5_ret != 0) {
+ TALLOC_FREE(frame);
+ return krb5_ret;
+ }
+ } else {
+ const char *host = "host";
+ char *tmp = NULL;
+ char *tmp_lower = NULL;
+
+ tmp = talloc_asprintf(frame, "%*.*s.%s",
+ computer_len,
+ computer_len,
+ sAMAccountName,
+ realm);
+ if (tmp == NULL) {
+ TALLOC_FREE(frame);
+ return ENOMEM;
+ }
+
+ tmp_lower = strlower_talloc(frame, tmp);
+ if (tmp_lower == NULL) {
+ TALLOC_FREE(frame);
+ return ENOMEM;
+ }
+
+ krb5_ret = krb5_build_principal_ext(krb5_ctx,
+ salt_princ,
+ strlen(upper_realm),
+ upper_realm,
+ strlen(host),
+ host,
+ strlen(tmp_lower),
+ tmp_lower,
+ 0);
+ if (krb5_ret != 0) {
+ TALLOC_FREE(frame);
+ return krb5_ret;
+ }
+ }
+
+ } else if (userPrincipalName != NULL) {
+ /*
+ * We parse the name not only to allow an easy
+ * replacement of the realm (no matter the realm in
+ * the UPN, the salt comes from the upper-case real
+ * realm, but also to correctly provide a salt when
+ * the UPN is host/foo.bar
+ *
+ * This can fail for a UPN of the form foo@bar@REALM
+ * (which is accepted by windows) however.
+ */
+ krb5_ret = krb5_parse_name(krb5_ctx,
+ userPrincipalName,
+ salt_princ);
+
+ if (krb5_ret != 0) {
+ TALLOC_FREE(frame);
+ return krb5_ret;
+ }
+
+ /*
+ * No matter what realm (including none) in the UPN,
+ * the realm is replaced with our upper-case realm
+ */
+ krb5_ret = smb_krb5_principal_set_realm(krb5_ctx,
+ *salt_princ,
+ upper_realm);
+ if (krb5_ret != 0) {
+ krb5_free_principal(krb5_ctx, *salt_princ);
+ TALLOC_FREE(frame);
+ return krb5_ret;
+ }
+ } else {
+ principal = sAMAccountName;
+ principal_len = strlen(principal);
+
+ krb5_ret = krb5_build_principal_ext(krb5_ctx,
+ salt_princ,
+ strlen(upper_realm),
+ upper_realm,
+ principal_len,
+ principal,
+ 0);
+ if (krb5_ret != 0) {
+ TALLOC_FREE(frame);
+ return krb5_ret;
+ }
+ }
+
+ TALLOC_FREE(frame);
+ return 0;
+}
+
+/**
+ * @brief This constructs the salt principal used by active directory
+ *
+ * Most Kerberos encryption types require a salt in order to
+ * calculate the long term private key for user/computer object
+ * based on a password.
+ *
+ * The returned _salt_principal is a string in forms like this:
+ * - host/somehost.example.com@EXAMPLE.COM
+ * - SomeAccount@EXAMPLE.COM
+ * - SomePrincipal@EXAMPLE.COM
+ *
+ * This is not the form that's used as salt, it's just
+ * the human readable form. It needs to be converted by
+ * smb_krb5_salt_principal2data().
+ *
+ * @param[in] realm The realm the user/computer is added too.
+ *
+ * @param[in] sAMAccountName The sAMAccountName attribute of the object.
+ *
+ * @param[in] userPrincipalName The userPrincipalName attribute of the object
+ * or NULL if not available.
+ *
+ * @param[in] uac_flags UF_ACCOUNT_TYPE_MASKed userAccountControl field
+ *
+ * @param[in] mem_ctx The TALLOC_CTX to allocate _salt_principal.
+ *
+ * @param[out] _salt_principal The resulting principal as string.
+ *
+ * @retval 0 Success; otherwise - Kerberos error codes
+ *
+ * @see smb_krb5_salt_principal2data
+ */
+int smb_krb5_salt_principal_str(const char *realm,
+ const char *sAMAccountName,
+ const char *userPrincipalName,
+ uint32_t uac_flags,
+ TALLOC_CTX *mem_ctx,
+ char **_salt_principal_str)
+{
+ krb5_principal salt_principal = NULL;
+ char *salt_principal_malloc;
+ krb5_context krb5_ctx;
+ krb5_error_code krb5_ret
+ = smb_krb5_init_context_common(&krb5_ctx);
+ if (krb5_ret != 0) {
+ DBG_ERR("kerberos init context failed (%s)\n",
+ error_message(krb5_ret));
+ return krb5_ret;
+ }
+
+ krb5_ret = smb_krb5_salt_principal(krb5_ctx,
+ realm,
+ sAMAccountName,
+ userPrincipalName,
+ uac_flags,
+ &salt_principal);
+ if (krb5_ret != 0) {
+ DBG_ERR("unable to create salt principal:%s\n",
+ error_message(krb5_ret));
+ return krb5_ret;
+ }
+
+ krb5_ret = krb5_unparse_name(krb5_ctx, salt_principal,
+ &salt_principal_malloc);
+ if (krb5_ret != 0) {
+ krb5_free_principal(krb5_ctx, salt_principal);
+ DBG_ERR("kerberos unparse of salt principal failed (%s)\n",
+ error_message(krb5_ret));
+ return krb5_ret;
+ }
+ krb5_free_principal(krb5_ctx, salt_principal);
+ *_salt_principal_str
+ = talloc_strdup(mem_ctx, salt_principal_malloc);
+ krb5_free_unparsed_name(krb5_ctx, salt_principal_malloc);
+
+ if (*_salt_principal_str == NULL) {
+ return ENOMEM;
+ }
+ return 0;
+}
+
+/**
+ * @brief Converts the salt principal string into the salt data blob
+ *
+ * This function takes a salt_principal as string in forms like this:
+ * - host/somehost.example.com@EXAMPLE.COM
+ * - SomeAccount@EXAMPLE.COM
+ * - SomePrincipal@EXAMPLE.COM
+ *
+ * It generates values like:
+ * - EXAMPLE.COMhost/somehost.example.com
+ * - EXAMPLE.COMSomeAccount
+ * - EXAMPLE.COMSomePrincipal
+ *
+ * @param[in] realm The realm the user/computer is added too.
+ *
+ * @param[in] sAMAccountName The sAMAccountName attribute of the object.
+ *
+ * @param[in] userPrincipalName The userPrincipalName attribute of the object
+ * or NULL if not available.
+ *
+ * @param[in] is_computer The indication of the object includes
+ * objectClass=computer.
+ *
+ * @param[in] mem_ctx The TALLOC_CTX to allocate _salt_principal.
+ *
+ * @param[out] _salt_principal The resulting principal as string.
+ *
+ * @retval 0 Success; otherwise - Kerberos error codes
+ *
+ * @see smb_krb5_salt_principal
+ */
+int smb_krb5_salt_principal2data(krb5_context context,
+ const char *salt_principal,
+ TALLOC_CTX *mem_ctx,
+ char **_salt_data)
+{
+ krb5_error_code ret;
+ krb5_principal salt_princ = NULL;
+ krb5_data salt;
+
+ *_salt_data = NULL;
+
+ ret = krb5_parse_name(context, salt_principal, &salt_princ);
+ if (ret != 0) {
+ return ret;
+ }
+
+ ret = smb_krb5_get_pw_salt(context, salt_princ, &salt);
+ krb5_free_principal(context, salt_princ);
+ if (ret != 0) {
+ return ret;
+ }
+
+ *_salt_data = talloc_strndup(mem_ctx,
+ (char *)salt.data,
+ salt.length);
+ smb_krb5_free_data_contents(context, &salt);
+ if (*_salt_data == NULL) {
+ return ENOMEM;
+ }
+
+ return 0;
+}
+
+#if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
+/**
+ * @brief Get a list of encryption types allowed for session keys
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] enctypes An allocated, zero-terminated list of encryption types
+ *
+ * This function returns an allocated list of encryption types allowed for
+ * session keys.
+ *
+ * Use krb5_free_enctypes() to free the enctypes when it is no longer needed.
+ *
+ * @retval 0 Success; otherwise - Kerberos error codes
+ */
+krb5_error_code smb_krb5_get_allowed_etypes(krb5_context context,
+ krb5_enctype **enctypes)
+{
+ return krb5_get_permitted_enctypes(context, enctypes);
+}
+#elif defined(HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES)
+krb5_error_code smb_krb5_get_allowed_etypes(krb5_context context,
+ krb5_enctype **enctypes)
+{
+#ifdef HAVE_KRB5_PDU_NONE_DECL
+ return krb5_get_default_in_tkt_etypes(context, KRB5_PDU_NONE, enctypes);
+#else
+ return krb5_get_default_in_tkt_etypes(context, enctypes);
+#endif
+}
+#else
+#error UNKNOWN_GET_ENCTYPES_FUNCTIONS
+#endif
+
+
+/**
+ * @brief Convert a string principal name to a Kerberos principal.
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] name The principal as a unix charset string.
+ *
+ * @param[out] principal The newly allocated principal.
+ *
+ * Use krb5_free_principal() to free a principal when it is no longer needed.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_parse_name(krb5_context context,
+ const char *name,
+ krb5_principal *principal)
+{
+ krb5_error_code ret;
+ char *utf8_name;
+ size_t converted_size;
+ TALLOC_CTX *frame = talloc_stackframe();
+
+ if (!push_utf8_talloc(frame, &utf8_name, name, &converted_size)) {
+ talloc_free(frame);
+ return ENOMEM;
+ }
+
+ ret = krb5_parse_name(context, utf8_name, principal);
+ if (ret == KRB5_PARSE_MALFORMED) {
+ ret = krb5_parse_name_flags(context, utf8_name,
+ KRB5_PRINCIPAL_PARSE_ENTERPRISE,
+ principal);
+ }
+ TALLOC_FREE(frame);
+ return ret;
+}
+
+/**
+ * @brief Convert a Kerberos principal structure to a string representation.
+ *
+ * The resulting string representation will be a unix charset name and is
+ * talloc'ed.
+ *
+ * @param[in] mem_ctx The talloc context to allocate memory on.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] principal The principal.
+ *
+ * @param[out] unix_name A string representation of the principal name as with
+ * unix charset.
+ *
+ * Use talloc_free() to free the string representation if it is no longer
+ * needed.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_unparse_name(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_const_principal principal,
+ char **unix_name)
+{
+ krb5_error_code ret;
+ char *utf8_name;
+ size_t converted_size;
+
+ *unix_name = NULL;
+ ret = krb5_unparse_name(context, principal, &utf8_name);
+ if (ret) {
+ return ret;
+ }
+
+ if (!pull_utf8_talloc(mem_ctx, unix_name, utf8_name, &converted_size)) {
+ krb5_free_unparsed_name(context, utf8_name);
+ return ENOMEM;
+ }
+ krb5_free_unparsed_name(context, utf8_name);
+ return 0;
+}
+
+/**
+ * @brief Free the contents of a krb5_data structure and zero the data field.
+ *
+ * @param[in] context The krb5 context
+ *
+ * @param[in] pdata The data structure to free contents of
+ *
+ * This function frees the contents, not the structure itself.
+ */
+void smb_krb5_free_data_contents(krb5_context context, krb5_data *pdata)
+{
+#if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
+ if (pdata->data) {
+ krb5_free_data_contents(context, pdata);
+ }
+#elif defined(HAVE_KRB5_DATA_FREE)
+ krb5_data_free(context, pdata);
+#else
+ SAFE_FREE(pdata->data);
+#endif
+}
+
+/*
+ * @brief copy a buffer into a krb5_data struct
+ *
+ * @param[in] p The krb5_data
+ * @param[in] data The data to copy
+ * @param[in] length The length of the data to copy
+ * @return krb5_error_code
+ *
+ * Caller has to free krb5_data with smb_krb5_free_data_contents().
+ */
+krb5_error_code smb_krb5_copy_data_contents(krb5_data *p,
+ const void *data,
+ size_t len)
+{
+#if defined(HAVE_KRB5_DATA_COPY)
+ return krb5_data_copy(p, data, len);
+#else
+ if (len) {
+ p->data = malloc(len);
+ if (p->data == NULL) {
+ return ENOMEM;
+ }
+ memmove(p->data, data, len);
+ } else {
+ p->data = NULL;
+ }
+ p->length = len;
+ p->magic = KV5M_DATA;
+ return 0;
+#endif
+}
+
+/*
+ * @brief put a buffer reference into a krb5_data struct
+ *
+ * @param[in] data The data to reference
+ * @param[in] length The length of the data to reference
+ * @return krb5_data
+ *
+ * Caller should not free krb5_data.
+ */
+krb5_data smb_krb5_make_data(void *data,
+ size_t len)
+{
+ krb5_data d;
+
+#ifdef SAMBA4_USES_HEIMDAL
+ d.data = (uint8_t *)data;
+ d.length = len;
+#else
+ d.magic = KV5M_DATA;
+ d.data = data;
+ d.length = len;
+#endif
+ return d;
+}
+
+krb5_data smb_krb5_data_from_blob(DATA_BLOB blob)
+{
+ return smb_krb5_make_data(blob.data, blob.length);
+}
+
+bool smb_krb5_get_smb_session_key(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_auth_context auth_context,
+ DATA_BLOB *session_key,
+ bool remote)
+{
+ krb5_keyblock *skey = NULL;
+ krb5_error_code err = 0;
+ bool ret = false;
+
+ if (remote) {
+#ifdef HAVE_KRB5_AUTH_CON_GETRECVSUBKEY
+ err = krb5_auth_con_getrecvsubkey(context,
+ auth_context,
+ &skey);
+#else /* HAVE_KRB5_AUTH_CON_GETRECVSUBKEY */
+ err = krb5_auth_con_getremotesubkey(context,
+ auth_context, &skey);
+#endif /* HAVE_KRB5_AUTH_CON_GETRECVSUBKEY */
+ } else {
+#ifdef HAVE_KRB5_AUTH_CON_GETSENDSUBKEY
+ err = krb5_auth_con_getsendsubkey(context,
+ auth_context,
+ &skey);
+#else /* HAVE_KRB5_AUTH_CON_GETSENDSUBKEY */
+ err = krb5_auth_con_getlocalsubkey(context,
+ auth_context, &skey);
+#endif /* HAVE_KRB5_AUTH_CON_GETSENDSUBKEY */
+ }
+
+ if (err || skey == NULL) {
+ DEBUG(10, ("KRB5 error getting session key %d\n", err));
+ goto done;
+ }
+
+ DEBUG(10, ("Got KRB5 session key of length %d\n",
+ (int)KRB5_KEY_LENGTH(skey)));
+
+ *session_key = data_blob_talloc(mem_ctx,
+ KRB5_KEY_DATA(skey),
+ KRB5_KEY_LENGTH(skey));
+ dump_data_pw("KRB5 Session Key:\n",
+ session_key->data,
+ session_key->length);
+
+ ret = true;
+
+done:
+ if (skey) {
+ krb5_free_keyblock(context, skey);
+ }
+
+ return ret;
+}
+
+
+/**
+ * @brief Get talloced string component of a principal
+ *
+ * @param[in] mem_ctx The TALLOC_CTX
+ * @param[in] context The krb5_context
+ * @param[in] principal The principal
+ * @param[in] component The component
+ * @param[out] out The output string
+ * @return krb5_error_code
+ *
+ * Caller must talloc_free if the return value is not NULL.
+ *
+ */
+krb5_error_code smb_krb5_principal_get_comp_string(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_const_principal principal,
+ unsigned int component,
+ char **out)
+{
+ char *out_str = NULL;
+#if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING)
+ const char *str = NULL;
+
+ str = krb5_principal_get_comp_string(context, principal, component);
+ if (str == NULL) {
+ return ENOENT;
+ }
+
+ out_str = talloc_strdup(mem_ctx, str);
+ if (out_str == NULL) {
+ return ENOMEM;
+ }
+#else
+ krb5_data *data;
+
+ if (component >= krb5_princ_size(context, principal)) {
+ return ENOENT;
+ }
+
+ data = krb5_princ_component(context, principal, component);
+ if (data == NULL) {
+ return ENOENT;
+ }
+
+ out_str = talloc_strndup(mem_ctx, data->data, data->length);
+ if (out_str == NULL) {
+ return ENOMEM;
+ }
+#endif
+ *out = out_str;
+ return 0;
+}
+
+/**
+ * @brief
+ *
+ * @param[in] ccache_string A string pointing to the cache to renew the ticket
+ * (e.g. FILE:/tmp/krb5cc_0) or NULL. If the principal
+ * ccache has not been specified, the default ccache
+ * will be used.
+ *
+ * @param[in] client_string The client principal string (e.g. user@SAMBA.SITE)
+ * or NULL. If the principal string has not been
+ * specified, the principal from the ccache will be
+ * retrieved.
+ *
+ * @param[in] service_string The service ticket string
+ * (e.g. krbtgt/SAMBA.SITE@SAMBA.SITE) or NULL. If
+ * the service ticket is specified, it is parsed
+ * (with the realm part ignored) and used as the
+ * server principal of the credential. Otherwise
+ * the ticket-granting service is used.
+ *
+ * @param[in] expire_time A pointer to store the credentials end time or
+ * NULL.
+ *
+ * @return 0 on Success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_renew_ticket(const char *ccache_string,
+ const char *client_string,
+ const char *service_string,
+ time_t *expire_time)
+{
+ krb5_error_code ret;
+ krb5_context context = NULL;
+ krb5_ccache ccache = NULL;
+ krb5_principal client = NULL;
+ krb5_creds creds, creds_in;
+
+ ZERO_STRUCT(creds);
+ ZERO_STRUCT(creds_in);
+
+ ret = smb_krb5_init_context_common(&context);
+ if (ret) {
+ DBG_ERR("kerberos init context failed (%s)\n",
+ error_message(ret));
+ goto done;
+ }
+
+ if (!ccache_string) {
+ ccache_string = krb5_cc_default_name(context);
+ }
+
+ if (!ccache_string) {
+ ret = EINVAL;
+ goto done;
+ }
+
+ DBG_DEBUG("Using %s as ccache for client '%s' and service '%s'\n",
+ ccache_string, client_string, service_string);
+
+ /* FIXME: we should not fall back to defaults */
+ ret = krb5_cc_resolve(context, discard_const_p(char, ccache_string), &ccache);
+ if (ret) {
+ goto done;
+ }
+
+ if (client_string) {
+ ret = smb_krb5_parse_name(context, client_string, &client);
+ if (ret) {
+ goto done;
+ }
+ } else {
+ ret = krb5_cc_get_principal(context, ccache, &client);
+ if (ret) {
+ goto done;
+ }
+ }
+
+ ret = krb5_get_renewed_creds(context, &creds, client, ccache, discard_const_p(char, service_string));
+ if (ret) {
+ DBG_DEBUG("krb5_get_renewed_creds using ccache '%s' "
+ "for client '%s' and service '%s' failed: %s\n",
+ ccache_string, client_string, service_string,
+ error_message(ret));
+ goto done;
+ }
+
+ /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
+ ret = krb5_cc_initialize(context, ccache, client);
+ if (ret) {
+ goto done;
+ }
+
+ ret = krb5_cc_store_cred(context, ccache, &creds);
+
+ if (expire_time) {
+ *expire_time = (time_t) creds.times.endtime;
+ }
+
+done:
+ krb5_free_cred_contents(context, &creds_in);
+ krb5_free_cred_contents(context, &creds);
+
+ if (client) {
+ krb5_free_principal(context, client);
+ }
+ if (ccache) {
+ krb5_cc_close(context, ccache);
+ }
+ if (context) {
+ krb5_free_context(context);
+ }
+
+ return ret;
+}
+
+/**
+ * @brief Free the data stored in an smb_krb5_addresses structure.
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] addr The address structure to free.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_free_addresses(krb5_context context,
+ smb_krb5_addresses *addr)
+{
+ krb5_error_code ret = 0;
+ if (addr == NULL) {
+ return ret;
+ }
+#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
+ krb5_free_addresses(context, addr->addrs);
+#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
+ ret = krb5_free_addresses(context, addr->addrs);
+ SAFE_FREE(addr->addrs);
+#endif
+ SAFE_FREE(addr);
+ addr = NULL;
+ return ret;
+}
+
+#define MAX_NETBIOSNAME_LEN 16
+
+/**
+ * @brief Add a netbios name to the array of addresses
+ *
+ * @param[in] kerb_addr A pointer to the smb_krb5_addresses to add the
+ * netbios name to.
+ *
+ * @param[in] netbios_name The netbios name to add.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr,
+ const char *netbios_name)
+{
+ krb5_error_code ret = 0;
+ char buf[MAX_NETBIOSNAME_LEN];
+ int len;
+#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
+ krb5_address **addrs = NULL;
+#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
+ krb5_addresses *addrs = NULL;
+#endif
+
+ *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
+ if (*kerb_addr == NULL) {
+ return ENOMEM;
+ }
+
+ /* temporarily duplicate put_name() code here to avoid dependency
+ * issues for a 5 lines function */
+ len = strlen(netbios_name);
+ memcpy(buf, netbios_name,
+ (len < MAX_NETBIOSNAME_LEN) ? len : MAX_NETBIOSNAME_LEN - 1);
+ if (len < MAX_NETBIOSNAME_LEN - 1) {
+ memset(buf + len, ' ', MAX_NETBIOSNAME_LEN - 1 - len);
+ }
+ buf[MAX_NETBIOSNAME_LEN - 1] = 0x20;
+
+#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
+ {
+ int num_addr = 2;
+
+ addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
+ if (addrs == NULL) {
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
+
+ memset(addrs, 0, sizeof(krb5_address *) * num_addr);
+
+ addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
+ if (addrs[0] == NULL) {
+ SAFE_FREE(addrs);
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
+
+ addrs[0]->magic = KV5M_ADDRESS;
+ addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
+ addrs[0]->length = MAX_NETBIOSNAME_LEN;
+ addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
+ if (addrs[0]->contents == NULL) {
+ SAFE_FREE(addrs[0]);
+ SAFE_FREE(addrs);
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
+
+ memcpy(addrs[0]->contents, buf, addrs[0]->length);
+
+ addrs[1] = NULL;
+ }
+#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
+ {
+ addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
+ if (addrs == NULL) {
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
+
+ memset(addrs, 0, sizeof(krb5_addresses));
+
+ addrs->len = 1;
+ addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
+ if (addrs->val == NULL) {
+ SAFE_FREE(addrs);
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
+
+ addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
+ addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
+ addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
+ if (addrs->val[0].address.data == NULL) {
+ SAFE_FREE(addrs->val);
+ SAFE_FREE(addrs);
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
+
+ memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
+ }
+#else
+#error UNKNOWN_KRB5_ADDRESS_FORMAT
+#endif
+ (*kerb_addr)->addrs = addrs;
+
+ return ret;
+}
+
+/**
+ * @brief Get the enctype from a key table entry
+ *
+ * @param[in] kt_entry Key table entry to get the enctype from.
+ *
+ * @return The enctype from the entry.
+ */
+krb5_enctype smb_krb5_kt_get_enctype_from_entry(krb5_keytab_entry *kt_entry)
+{
+ return KRB5_KEY_TYPE(KRB5_KT_KEY(kt_entry));
+}
+
+/**
+ * @brief Free the contents of a key table entry.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] kt_entry The key table entry to free the contents of.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ *
+ * The pointer itself is not freed.
+ */
+krb5_error_code smb_krb5_kt_free_entry(krb5_context context,
+ krb5_keytab_entry *kt_entry)
+{
+/* Try krb5_free_keytab_entry_contents first, since
+ * MIT Kerberos >= 1.7 has both krb5_free_keytab_entry_contents and
+ * krb5_kt_free_entry but only has a prototype for the first, while the
+ * second is considered private.
+ */
+#if defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
+ return krb5_free_keytab_entry_contents(context, kt_entry);
+#elif defined(HAVE_KRB5_KT_FREE_ENTRY)
+ return krb5_kt_free_entry(context, kt_entry);
+#else
+#error UNKNOWN_KT_FREE_FUNCTION
+#endif
+}
+
+
+/**
+ * @brief Convert an encryption type to a string.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] enctype The encryption type.
+ *
+ * @param[in] etype_s A pointer to store the allocated encryption type as a
+ * string.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ *
+ * The caller needs to free the allocated string etype_s.
+ */
+krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
+ krb5_enctype enctype,
+ char **etype_s)
+{
+#ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
+ return krb5_enctype_to_string(context, enctype, etype_s); /* Heimdal */
+#elif defined(HAVE_KRB5_ENCTYPE_TO_STRING_WITH_SIZE_T_ARG)
+ char buf[256];
+ krb5_error_code ret = krb5_enctype_to_string(enctype, buf, 256); /* MIT */
+ if (ret) {
+ return ret;
+ }
+ *etype_s = SMB_STRDUP(buf);
+ if (!*etype_s) {
+ return ENOMEM;
+ }
+ return ret;
+#else
+#error UNKNOWN_KRB5_ENCTYPE_TO_STRING_FUNCTION
+#endif
+}
+
+/* This MAX_NAME_LEN is a constant defined in krb5.h */
+#ifndef MAX_KEYTAB_NAME_LEN
+#define MAX_KEYTAB_NAME_LEN 1100
+#endif
+
+/**
+ * @brief Open a key table readonly or with readwrite access.
+ *
+ * Allows one to use a different keytab than the default one using a relative
+ * path to the keytab.
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] keytab_name_req The path to the key table.
+ *
+ * @param[in] write_access Open with readwrite access.
+ *
+ * @param[in] keytab A pointer to the opened key table.
+ *
+ * The keytab pointer should be freed using krb5_kt_close().
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_kt_open_relative(krb5_context context,
+ const char *keytab_name_req,
+ bool write_access,
+ krb5_keytab *keytab)
+{
+ krb5_error_code ret = 0;
+ TALLOC_CTX *mem_ctx;
+ char keytab_string[MAX_KEYTAB_NAME_LEN];
+ char *kt_str = NULL;
+ bool found_valid_name = false;
+ const char *pragma = "FILE";
+ const char *tmp = NULL;
+
+ if (!write_access && !keytab_name_req) {
+ /* caller just wants to read the default keytab readonly, so be it */
+ return krb5_kt_default(context, keytab);
+ }
+
+ mem_ctx = talloc_init("smb_krb5_kt_open_relative");
+ if (!mem_ctx) {
+ return ENOMEM;
+ }
+
+#ifdef HAVE_WRFILE_KEYTAB
+ if (write_access) {
+ pragma = "WRFILE";
+ }
+#endif
+
+ if (keytab_name_req) {
+
+ if (strlen(keytab_name_req) > MAX_KEYTAB_NAME_LEN) {
+ ret = KRB5_CONFIG_NOTENUFSPACE;
+ goto out;
+ }
+
+ if ((strncmp(keytab_name_req, "WRFILE:", 7) == 0) ||
+ (strncmp(keytab_name_req, "FILE:", 5) == 0)) {
+ tmp = keytab_name_req;
+ goto resolve;
+ }
+
+ tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, keytab_name_req);
+ if (!tmp) {
+ ret = ENOMEM;
+ goto out;
+ }
+
+ goto resolve;
+ }
+
+ /* we need to handle more complex keytab_strings, like:
+ * "ANY:FILE:/etc/krb5.keytab,krb4:/etc/srvtab" */
+
+ ret = krb5_kt_default_name(context, &keytab_string[0], MAX_KEYTAB_NAME_LEN - 2);
+ if (ret) {
+ goto out;
+ }
+
+ DBG_DEBUG("krb5_kt_default_name returned %s\n", keytab_string);
+
+ tmp = talloc_strdup(mem_ctx, keytab_string);
+ if (!tmp) {
+ ret = ENOMEM;
+ goto out;
+ }
+
+ if (strncmp(tmp, "ANY:", 4) == 0) {
+ tmp += 4;
+ }
+
+ memset(&keytab_string, '\0', sizeof(keytab_string));
+
+ while (next_token_talloc(mem_ctx, &tmp, &kt_str, ",")) {
+ if (strncmp(kt_str, "WRFILE:", 7) == 0) {
+ found_valid_name = true;
+ tmp = kt_str;
+ tmp += 7;
+ }
+
+ if (strncmp(kt_str, "FILE:", 5) == 0) {
+ found_valid_name = true;
+ tmp = kt_str;
+ tmp += 5;
+ }
+
+ if (tmp[0] == '/') {
+ /* Treat as a FILE: keytab definition. */
+ found_valid_name = true;
+ }
+
+ if (found_valid_name) {
+ if (tmp[0] != '/') {
+ ret = KRB5_KT_BADNAME;
+ goto out;
+ }
+
+ tmp = talloc_asprintf(mem_ctx, "%s:%s", pragma, tmp);
+ if (!tmp) {
+ ret = ENOMEM;
+ goto out;
+ }
+ break;
+ }
+ }
+
+ if (!found_valid_name) {
+ ret = KRB5_KT_UNKNOWN_TYPE;
+ goto out;
+ }
+
+resolve:
+ DBG_DEBUG("resolving: %s\n", tmp);
+ ret = krb5_kt_resolve(context, tmp, keytab);
+
+out:
+ TALLOC_FREE(mem_ctx);
+ return ret;
+}
+
+/**
+ * @brief Open a key table readonly or with readwrite access.
+ *
+ * Allows one to use a different keytab than the default one. The path needs to be
+ * an absolute path or an error will be returned.
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] keytab_name_req The path to the key table.
+ *
+ * @param[in] write_access Open with readwrite access.
+ *
+ * @param[in] keytab A pointer to the opened key table.
+ *
+ * The keytab pointer should be freed using krb5_kt_close().
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_kt_open(krb5_context context,
+ const char *keytab_name_req,
+ bool write_access,
+ krb5_keytab *keytab)
+{
+ int cmp;
+
+ if (keytab_name_req == NULL) {
+ return KRB5_KT_BADNAME;
+ }
+
+ if (keytab_name_req[0] == '/') {
+ goto open_keytab;
+ }
+
+ cmp = strncmp(keytab_name_req, "FILE:/", 6);
+ if (cmp == 0) {
+ goto open_keytab;
+ }
+
+ cmp = strncmp(keytab_name_req, "WRFILE:/", 8);
+ if (cmp == 0) {
+ goto open_keytab;
+ }
+
+ DBG_WARNING("ERROR: Invalid keytab name: %s\n", keytab_name_req);
+
+ return KRB5_KT_BADNAME;
+
+open_keytab:
+ return smb_krb5_kt_open_relative(context,
+ keytab_name_req,
+ write_access,
+ keytab);
+}
+
+/**
+ * @brief Get a key table name.
+ *
+ * @param[in] mem_ctx The talloc context to use for allocation.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] keytab The key table to get the name from.
+ *
+ * @param[in] keytab_name A talloc'ed string of the key table name.
+ *
+ * The talloc'ed name string needs to be freed with talloc_free().
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_kt_get_name(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_keytab keytab,
+ const char **keytab_name)
+{
+ char keytab_string[MAX_KEYTAB_NAME_LEN];
+ krb5_error_code ret = 0;
+
+ ret = krb5_kt_get_name(context, keytab,
+ keytab_string, MAX_KEYTAB_NAME_LEN - 2);
+ if (ret) {
+ return ret;
+ }
+
+ *keytab_name = talloc_strdup(mem_ctx, keytab_string);
+ if (!*keytab_name) {
+ return ENOMEM;
+ }
+
+ return ret;
+}
+
+/**
+ * @brief Seek and delete old entries in a keytab based on the passed
+ * principal.
+ *
+ * @param[in] context The KRB5 context to use.
+ *
+ * @param[in] keytab The keytab to operate on.
+ *
+ * @param[in] keep_old_kvno Keep the entries with the previous kvno.
+ *
+ * @param[in] kvno The kvno to use.
+ *
+ * @param[in] enctype_only Only evaluate the enctype argument if true
+ *
+ * @param[in] enctype Only search for entries with the specified enctype
+ *
+ * @param[in] princ_s The principal as a string to search for.
+ *
+ * @param[in] princ The principal as a krb5_principal to search for.
+ *
+ * @param[in] flush Whether to flush the complete keytab.
+ *
+ * @retval 0 on Success
+ *
+ * @return An appropriate KRB5 error code.
+ */
+krb5_error_code smb_krb5_kt_seek_and_delete_old_entries(krb5_context context,
+ krb5_keytab keytab,
+ bool keep_old_kvno,
+ krb5_kvno kvno,
+ bool enctype_only,
+ krb5_enctype enctype,
+ const char *princ_s,
+ krb5_principal princ,
+ bool flush)
+{
+ krb5_error_code ret;
+ krb5_kt_cursor cursor;
+ krb5_keytab_entry kt_entry;
+ char *ktprinc = NULL;
+ krb5_kvno old_kvno = kvno - 1;
+ TALLOC_CTX *tmp_ctx;
+
+ if (flush) {
+ SMB_ASSERT(!keep_old_kvno);
+ SMB_ASSERT(!enctype_only);
+ SMB_ASSERT(princ_s == NULL);
+ SMB_ASSERT(princ == NULL);
+ } else {
+ SMB_ASSERT(princ_s != NULL);
+ SMB_ASSERT(princ != NULL);
+ }
+
+ ZERO_STRUCT(cursor);
+ ZERO_STRUCT(kt_entry);
+
+ /*
+ * Start with talloc_new() and only then call krb5_kt_start_seq_get().
+ * If any of them fails, the cleanup code is simpler.
+ */
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) {
+ return ENOMEM;
+ }
+
+ ret = krb5_kt_start_seq_get(context, keytab, &cursor);
+ if (ret == KRB5_KT_END || ret == ENOENT ) {
+ /* no entries */
+ talloc_free(tmp_ctx);
+ return 0;
+ }
+
+ DEBUG(3, (__location__ ": Will try to delete old keytab entries\n"));
+ while (!krb5_kt_next_entry(context, keytab, &kt_entry, &cursor)) {
+ bool name_ok = false;
+ krb5_enctype kt_entry_enctype =
+ smb_krb5_kt_get_enctype_from_entry(&kt_entry);
+
+ if (princ_s != NULL) {
+ ret = smb_krb5_unparse_name(tmp_ctx, context,
+ kt_entry.principal,
+ &ktprinc);
+ if (ret) {
+ DEBUG(1, (__location__
+ ": smb_krb5_unparse_name failed "
+ "(%s)\n", error_message(ret)));
+ goto out;
+ }
+
+#ifdef HAVE_KRB5_KT_COMPARE
+ name_ok = krb5_kt_compare(context, &kt_entry,
+ princ, 0, 0);
+#else
+ name_ok = (strcmp(ktprinc, princ_s) == 0);
+#endif
+
+ if (!name_ok) {
+ DEBUG(10, (__location__ ": ignoring keytab "
+ "entry principal %s, kvno = %d\n",
+ ktprinc, kt_entry.vno));
+
+ /* Not a match,
+ * just free this entry and continue. */
+ ret = smb_krb5_kt_free_entry(context,
+ &kt_entry);
+ ZERO_STRUCT(kt_entry);
+ if (ret) {
+ DEBUG(1, (__location__
+ ": smb_krb5_kt_free_entry "
+ "failed (%s)\n",
+ error_message(ret)));
+ goto out;
+ }
+
+ TALLOC_FREE(ktprinc);
+ continue;
+ }
+
+ TALLOC_FREE(ktprinc);
+ }
+
+ /*------------------------------------------------------------
+ * Save the entries with kvno - 1. This is what microsoft does
+ * to allow people with existing sessions that have kvno - 1
+ * to still work. Otherwise, when the password for the machine
+ * changes, all kerberized sessions will 'break' until either
+ * the client reboots or the client's session key expires and
+ * they get a new session ticket with the new kvno.
+ * Some keytab files only store the kvno in 8bits, limit
+ * the compare accordingly.
+ */
+
+ if (keep_old_kvno && ((kt_entry.vno & 0xff) == (old_kvno & 0xff))) {
+ DEBUG(5, (__location__ ": Saving previous (kvno %d) "
+ "entry for principal: %s.\n",
+ old_kvno,
+ princ_s != NULL ? princ_s : "UNKNOWN"));
+ continue;
+ }
+
+ if (enctype_only &&
+ ((kt_entry.vno & 0xff) == (kvno & 0xff)) &&
+ (kt_entry_enctype != enctype))
+ {
+ DEBUG(5, (__location__ ": Saving entry with kvno [%d] "
+ "enctype [%d] for principal: %s.\n",
+ kvno, kt_entry_enctype,
+ princ_s != NULL ? princ_s : "UNKNOWN"));
+ continue;
+ }
+
+ DEBUG(5, (__location__ ": Found old entry for principal: %s "
+ "(kvno %d) - trying to remove it.\n",
+ princ_s != NULL ? princ_s : "UNKNOWN",
+ kt_entry.vno));
+
+ ret = krb5_kt_end_seq_get(context, keytab, &cursor);
+ ZERO_STRUCT(cursor);
+ if (ret) {
+ DEBUG(1, (__location__ ": krb5_kt_end_seq_get() "
+ "failed (%s)\n", error_message(ret)));
+ goto out;
+ }
+ ret = krb5_kt_remove_entry(context, keytab, &kt_entry);
+ if (ret) {
+ DEBUG(1, (__location__ ": krb5_kt_remove_entry() "
+ "failed (%s)\n", error_message(ret)));
+ goto out;
+ }
+
+ DEBUG(5, (__location__ ": removed old entry for principal: "
+ "%s (kvno %d).\n",
+ princ_s != NULL ? princ_s : "UNKNOWN",
+ kt_entry.vno));
+
+ ret = krb5_kt_start_seq_get(context, keytab, &cursor);
+ if (ret) {
+ DEBUG(1, (__location__ ": krb5_kt_start_seq() failed "
+ "(%s)\n", error_message(ret)));
+ goto out;
+ }
+ ret = smb_krb5_kt_free_entry(context, &kt_entry);
+ ZERO_STRUCT(kt_entry);
+ if (ret) {
+ DEBUG(1, (__location__ ": krb5_kt_remove_entry() "
+ "failed (%s)\n", error_message(ret)));
+ goto out;
+ }
+ }
+
+out:
+ talloc_free(tmp_ctx);
+ if (!all_zero((uint8_t *)&kt_entry, sizeof(kt_entry))) {
+ smb_krb5_kt_free_entry(context, &kt_entry);
+ }
+ if (!all_zero((uint8_t *)&cursor, sizeof(cursor))) {
+ krb5_kt_end_seq_get(context, keytab, &cursor);
+ }
+ return ret;
+}
+
+/**
+ * @brief Add a keytab entry for the given principal
+ *
+ * @param[in] context The krb5 context to use.
+ *
+ * @param[in] keytab The keytab to add the entry to.
+ *
+ * @param[in] kvno The kvno to use.
+ *
+ * @param[in] princ_s The principal as a string.
+ *
+ * @param[in] salt_principal The salt principal to salt the password with.
+ * Only needed for keys which support salting.
+ * If no salt is used set no_salt to false and
+ * pass NULL here.
+ *
+ * @param[in] enctype The encryption type of the keytab entry.
+ *
+ * @param[in] password The password of the keytab entry.
+ *
+ * @param[in] no_salt If the password should not be salted. Normally
+ * this is only set to false for encryption types
+ * which do not support salting like RC4.
+ *
+ * @retval 0 on Success
+ *
+ * @return A corresponding KRB5 error code.
+ *
+ * @see smb_krb5_kt_open()
+ */
+krb5_error_code smb_krb5_kt_add_entry(krb5_context context,
+ krb5_keytab keytab,
+ krb5_kvno kvno,
+ const char *princ_s,
+ const char *salt_principal,
+ krb5_enctype enctype,
+ krb5_data *password,
+ bool no_salt)
+{
+ krb5_error_code ret;
+ krb5_keytab_entry kt_entry;
+ krb5_principal princ = NULL;
+ krb5_keyblock *keyp;
+
+ ZERO_STRUCT(kt_entry);
+
+ ret = smb_krb5_parse_name(context, princ_s, &princ);
+ if (ret) {
+ DEBUG(1, (__location__ ": smb_krb5_parse_name(%s) "
+ "failed (%s)\n", princ_s, error_message(ret)));
+ goto out;
+ }
+
+ /* Seek and delete old keytab entries */
+ ret = smb_krb5_kt_seek_and_delete_old_entries(context,
+ keytab,
+ true, /* keep_old_kvno */
+ kvno,
+ true, /* enctype_only */
+ enctype,
+ princ_s,
+ princ,
+ false); /* flush */
+ if (ret) {
+ goto out;
+ }
+
+ /* If we get here, we have deleted all the old entries with kvno's
+ * not equal to the current kvno-1. */
+
+ keyp = KRB5_KT_KEY(&kt_entry);
+
+ if (no_salt) {
+ KRB5_KEY_DATA(keyp) = (KRB5_KEY_DATA_CAST *)SMB_MALLOC(password->length);
+ if (KRB5_KEY_DATA(keyp) == NULL) {
+ ret = ENOMEM;
+ goto out;
+ }
+ memcpy(KRB5_KEY_DATA(keyp), password->data, password->length);
+ KRB5_KEY_LENGTH(keyp) = password->length;
+ KRB5_KEY_TYPE(keyp) = enctype;
+ } else {
+ krb5_principal salt_princ = NULL;
+
+ /* Now add keytab entries for all encryption types */
+ ret = smb_krb5_parse_name(context, salt_principal, &salt_princ);
+ if (ret) {
+ DBG_WARNING("krb5_parse_name(%s) failed (%s)\n",
+ salt_principal, error_message(ret));
+ goto out;
+ }
+
+ ret = smb_krb5_create_key_from_string(context,
+ salt_princ,
+ NULL,
+ password,
+ enctype,
+ keyp);
+ krb5_free_principal(context, salt_princ);
+ if (ret != 0) {
+ goto out;
+ }
+ }
+
+ kt_entry.principal = princ;
+ kt_entry.vno = kvno;
+
+ DEBUG(3, (__location__ ": adding keytab entry for (%s) with "
+ "encryption type (%d) and version (%d)\n",
+ princ_s, enctype, kt_entry.vno));
+ ret = krb5_kt_add_entry(context, keytab, &kt_entry);
+ krb5_free_keyblock_contents(context, keyp);
+ ZERO_STRUCT(kt_entry);
+ if (ret) {
+ DEBUG(1, (__location__ ": adding entry to keytab "
+ "failed (%s)\n", error_message(ret)));
+ goto out;
+ }
+
+out:
+ if (princ) {
+ krb5_free_principal(context, princ);
+ }
+
+ return ret;
+}
+
+#if defined(HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE) && \
+ defined(HAVE_KRB5_GET_CREDS_OPT_ALLOC) && \
+ defined(HAVE_KRB5_GET_CREDS)
+static krb5_error_code smb_krb5_get_credentials_for_user_opt(krb5_context context,
+ krb5_ccache ccache,
+ krb5_principal me,
+ krb5_principal server,
+ krb5_principal impersonate_princ,
+ krb5_creds **out_creds)
+{
+ krb5_error_code ret;
+ krb5_get_creds_opt opt;
+
+ ret = krb5_get_creds_opt_alloc(context, &opt);
+ if (ret) {
+ goto done;
+ }
+ krb5_get_creds_opt_add_options(context, opt, KRB5_GC_FORWARDABLE);
+
+ if (impersonate_princ) {
+ ret = krb5_get_creds_opt_set_impersonate(context, opt,
+ impersonate_princ);
+ if (ret) {
+ goto done;
+ }
+ }
+
+ ret = krb5_get_creds(context, opt, ccache, server, out_creds);
+ if (ret) {
+ goto done;
+ }
+
+ done:
+ if (opt) {
+ krb5_get_creds_opt_free(context, opt);
+ }
+ return ret;
+}
+#endif /* HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE */
+
+#ifdef HAVE_KRB5_GET_CREDENTIALS_FOR_USER
+
+#if !HAVE_DECL_KRB5_GET_CREDENTIALS_FOR_USER
+krb5_error_code KRB5_CALLCONV
+krb5_get_credentials_for_user(krb5_context context, krb5_flags options,
+ krb5_ccache ccache, krb5_creds *in_creds,
+ krb5_data *subject_cert,
+ krb5_creds **out_creds);
+#endif /* !HAVE_DECL_KRB5_GET_CREDENTIALS_FOR_USER */
+
+static krb5_error_code smb_krb5_get_credentials_for_user(krb5_context context,
+ krb5_ccache ccache,
+ krb5_principal me,
+ krb5_principal server,
+ krb5_principal impersonate_princ,
+ krb5_creds **out_creds)
+{
+ krb5_error_code ret;
+ krb5_creds in_creds;
+
+ ZERO_STRUCT(in_creds);
+
+ if (impersonate_princ) {
+
+ in_creds.server = me;
+ in_creds.client = impersonate_princ;
+
+ ret = krb5_get_credentials_for_user(context,
+ 0, /* krb5_flags options */
+ ccache,
+ &in_creds,
+ NULL, /* krb5_data *subject_cert */
+ out_creds);
+ } else {
+ in_creds.client = me;
+ in_creds.server = server;
+
+ ret = krb5_get_credentials(context, 0, ccache,
+ &in_creds, out_creds);
+ }
+
+ return ret;
+}
+#endif /* HAVE_KRB5_GET_CREDENTIALS_FOR_USER */
+
+/*
+ * smb_krb5_get_credentials
+ *
+ * @brief Get krb5 credentials for a server
+ *
+ * @param[in] context An initialized krb5_context
+ * @param[in] ccache An initialized krb5_ccache
+ * @param[in] me The krb5_principal of the caller
+ * @param[in] server The krb5_principal of the requested service
+ * @param[in] impersonate_princ The krb5_principal of a user to impersonate as (optional)
+ * @param[out] out_creds The returned krb5_creds structure
+ * @return krb5_error_code
+ *
+ */
+krb5_error_code smb_krb5_get_credentials(krb5_context context,
+ krb5_ccache ccache,
+ krb5_principal me,
+ krb5_principal server,
+ krb5_principal impersonate_princ,
+ krb5_creds **out_creds)
+{
+ krb5_error_code ret;
+ krb5_creds *creds = NULL;
+
+ if (out_creds != NULL) {
+ *out_creds = NULL;
+ }
+
+ if (impersonate_princ) {
+#ifdef HAVE_KRB5_GET_CREDS_OPT_SET_IMPERSONATE /* Heimdal */
+ ret = smb_krb5_get_credentials_for_user_opt(context, ccache, me, server, impersonate_princ, &creds);
+#elif defined(HAVE_KRB5_GET_CREDENTIALS_FOR_USER) /* MIT */
+ ret = smb_krb5_get_credentials_for_user(context, ccache, me, server, impersonate_princ, &creds);
+#else
+ ret = ENOTSUP;
+#endif
+ } else {
+ krb5_creds in_creds;
+
+ ZERO_STRUCT(in_creds);
+
+ in_creds.client = me;
+ in_creds.server = server;
+
+ ret = krb5_get_credentials(context, 0, ccache,
+ &in_creds, &creds);
+ }
+ if (ret) {
+ goto done;
+ }
+
+ if (out_creds) {
+ *out_creds = creds;
+ }
+
+ done:
+ if (creds && ret) {
+ krb5_free_creds(context, creds);
+ }
+
+ return ret;
+}
+
+/**
+ * @brief Initialize a krb5_keyblock with the given data.
+ *
+ * Initializes a new keyblock, allocates the contents for the key and
+ * copies the data into the keyblock.
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] enctype The encryption type.
+ *
+ * @param[in] data The date to initialize the keyblock with.
+ *
+ * @param[in] length The length of the keyblock.
+ *
+ * @param[in] key Newly allocated keyblock structure.
+ *
+ * The key date must be freed using krb5_free_keyblock_contents() when it is
+ * no longer needed.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_keyblock_init_contents(krb5_context context,
+ krb5_enctype enctype,
+ const void *data,
+ size_t length,
+ krb5_keyblock *key)
+{
+#if defined(HAVE_KRB5_KEYBLOCK_INIT)
+ return krb5_keyblock_init(context, enctype, data, length, key);
+#else
+ memset(key, 0, sizeof(krb5_keyblock));
+ KRB5_KEY_DATA(key) = SMB_MALLOC(length);
+ if (NULL == KRB5_KEY_DATA(key)) {
+ return ENOMEM;
+ }
+ memcpy(KRB5_KEY_DATA(key), data, length);
+ KRB5_KEY_LENGTH(key) = length;
+ KRB5_KEY_TYPE(key) = enctype;
+ return 0;
+#endif
+}
+
+/**
+ * @brief Simulate a kinit by putting the tgt in the given credential cache.
+ *
+ * This function uses a keyblock rather than needing the original password.
+ *
+ * @param[in] ctx The library context
+ *
+ * @param[in] cc The credential cache to put the tgt in.
+ *
+ * @param[in] principal The client princial
+ *
+ * @param[in] keyblock The keyblock to use.
+ *
+ * @param[in] target_service The service name of the initial credentials (or NULL).
+ *
+ * @param[in] krb_options Initial credential options.
+ *
+ * @param[in] expire_time A pointer to store the expiration time of the
+ * credentials (or NULL).
+ *
+ * @param[in] kdc_time A pointer to store the time when the ticket becomes
+ * valid (or NULL).
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_kinit_keyblock_ccache(krb5_context ctx,
+ krb5_ccache cc,
+ krb5_principal principal,
+ krb5_keyblock *keyblock,
+ const char *target_service,
+ krb5_get_init_creds_opt *krb_options,
+ time_t *expire_time,
+ time_t *kdc_time)
+{
+ krb5_error_code code = 0;
+ krb5_creds my_creds;
+
+#if defined(HAVE_KRB5_GET_INIT_CREDS_KEYBLOCK)
+ code = krb5_get_init_creds_keyblock(ctx, &my_creds, principal,
+ keyblock, 0, target_service,
+ krb_options);
+#elif defined(HAVE_KRB5_GET_INIT_CREDS_KEYTAB)
+{
+#define SMB_CREDS_KEYTAB "MEMORY:tmp_kinit_keyblock_ccache"
+ char tmp_name[64] = {0};
+ krb5_keytab_entry entry;
+ krb5_keytab keytab;
+ int rc;
+
+ memset(&entry, 0, sizeof(entry));
+ entry.principal = principal;
+ *(KRB5_KT_KEY(&entry)) = *keyblock;
+
+ rc = snprintf(tmp_name, sizeof(tmp_name),
+ "%s-%p",
+ SMB_CREDS_KEYTAB,
+ &my_creds);
+ if (rc < 0) {
+ return KRB5_KT_BADNAME;
+ }
+ code = krb5_kt_resolve(ctx, tmp_name, &keytab);
+ if (code) {
+ return code;
+ }
+
+ code = krb5_kt_add_entry(ctx, keytab, &entry);
+ if (code) {
+ (void)krb5_kt_close(ctx, keytab);
+ goto done;
+ }
+
+ code = krb5_get_init_creds_keytab(ctx, &my_creds, principal,
+ keytab, 0, target_service,
+ krb_options);
+ (void)krb5_kt_close(ctx, keytab);
+}
+#else
+#error krb5_get_init_creds_keyblock not available!
+#endif
+ if (code) {
+ return code;
+ }
+
+#ifndef SAMBA4_USES_HEIMDAL /* MIT */
+ /*
+ * We need to store the principal as returned from the KDC to the
+ * credentials cache. If we don't do that the KRB5 library is not
+ * able to find the tickets it is looking for
+ */
+ principal = my_creds.client;
+#endif
+ code = krb5_cc_initialize(ctx, cc, principal);
+ if (code) {
+ goto done;
+ }
+
+ code = krb5_cc_store_cred(ctx, cc, &my_creds);
+ if (code) {
+ goto done;
+ }
+
+ if (expire_time) {
+ *expire_time = (time_t) my_creds.times.endtime;
+ }
+
+ if (kdc_time) {
+ *kdc_time = (time_t) my_creds.times.starttime;
+ }
+
+ code = 0;
+done:
+ krb5_free_cred_contents(ctx, &my_creds);
+ return code;
+}
+
+/**
+ * @brief Simulate a kinit by putting the tgt in the given credential cache.
+ *
+ * @param[in] ctx The library context
+ *
+ * @param[in] cc The credential cache to put the tgt in.
+ *
+ * @param[in] principal The client princial
+ *
+ * @param[in] password The password (or NULL).
+ *
+ * @param[in] target_service The service name of the initial credentials (or NULL).
+ *
+ * @param[in] krb_options Initial credential options.
+ *
+ * @param[in] expire_time A pointer to store the expiration time of the
+ * credentials (or NULL).
+ *
+ * @param[in] kdc_time A pointer to store the time when the ticket becomes
+ * valid (or NULL).
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_kinit_password_ccache(krb5_context ctx,
+ krb5_ccache cc,
+ krb5_principal principal,
+ const char *password,
+ const char *target_service,
+ krb5_get_init_creds_opt *krb_options,
+ time_t *expire_time,
+ time_t *kdc_time)
+{
+ krb5_error_code code = 0;
+ krb5_creds my_creds;
+
+ code = krb5_get_init_creds_password(ctx, &my_creds, principal,
+ password, NULL, NULL, 0,
+ target_service, krb_options);
+ if (code) {
+ return code;
+ }
+
+ /*
+ * We need to store the principal as returned from the KDC to the
+ * credentials cache. If we don't do that the KRB5 library is not
+ * able to find the tickets it is looking for
+ */
+ principal = my_creds.client;
+ code = krb5_cc_initialize(ctx, cc, principal);
+ if (code) {
+ goto done;
+ }
+
+ code = krb5_cc_store_cred(ctx, cc, &my_creds);
+ if (code) {
+ goto done;
+ }
+
+ if (expire_time) {
+ *expire_time = (time_t) my_creds.times.endtime;
+ }
+
+ if (kdc_time) {
+ *kdc_time = (time_t) my_creds.times.starttime;
+ }
+
+ code = 0;
+done:
+ krb5_free_cred_contents(ctx, &my_creds);
+ return code;
+}
+
+#ifdef SAMBA4_USES_HEIMDAL
+/**
+ * @brief Simulate a kinit by putting the tgt in the given credential cache.
+ *
+ * @param[in] ctx The library context
+ *
+ * @param[in] cc The credential cache to store the tgt in.
+ *
+ * @param[in] principal The initial client princial.
+ *
+ * @param[in] password The password (or NULL).
+ *
+ * @param[in] impersonate_principal The impersonation principal (or NULL).
+ *
+ * @param[in] self_service The local service for S4U2Self if
+ * impersonate_principal is specified).
+ *
+ * @param[in] target_service The service name of the initial credentials
+ * (kpasswd/REALM or a remote service). It defaults
+ * to the krbtgt if NULL.
+ *
+ * @param[in] krb_options Initial credential options.
+ *
+ * @param[in] expire_time A pointer to store the expiration time of the
+ * credentials (or NULL).
+ *
+ * @param[in] kdc_time A pointer to store the time when the ticket becomes
+ * valid (or NULL).
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_kinit_s4u2_ccache(krb5_context ctx,
+ krb5_ccache store_cc,
+ krb5_principal init_principal,
+ const char *init_password,
+ krb5_principal impersonate_principal,
+ const char *self_service,
+ const char *target_service,
+ krb5_get_init_creds_opt *krb_options,
+ time_t *expire_time,
+ time_t *kdc_time)
+{
+ krb5_error_code code = 0;
+ krb5_get_creds_opt options;
+ krb5_principal store_principal;
+ krb5_creds store_creds;
+ krb5_creds *s4u2self_creds;
+ Ticket s4u2self_ticket;
+ size_t s4u2self_ticketlen;
+ krb5_creds *s4u2proxy_creds;
+ krb5_principal self_princ;
+ bool s4u2proxy;
+ krb5_principal target_princ;
+ krb5_ccache tmp_cc;
+ const char *self_realm;
+ const char *client_realm = NULL;
+ krb5_principal blacklist_principal = NULL;
+ krb5_principal whitelist_principal = NULL;
+
+ code = krb5_get_init_creds_password(ctx, &store_creds,
+ init_principal,
+ init_password,
+ NULL, NULL,
+ 0,
+ NULL,
+ krb_options);
+ if (code != 0) {
+ return code;
+ }
+
+ store_principal = init_principal;
+
+ /*
+ * We are trying S4U2Self now:
+ *
+ * As we do not want to expose our TGT in the
+ * krb5_ccache, which is also holds the impersonated creds.
+ *
+ * Some low level krb5/gssapi function might use the TGT
+ * identity and let the client act as our machine account.
+ *
+ * We need to avoid that and use a temporary krb5_ccache
+ * in order to pass our TGT to the krb5_get_creds() function.
+ */
+ code = krb5_cc_new_unique(ctx, NULL, NULL, &tmp_cc);
+ if (code != 0) {
+ krb5_free_cred_contents(ctx, &store_creds);
+ return code;
+ }
+
+ code = krb5_cc_initialize(ctx, tmp_cc, store_creds.client);
+ if (code != 0) {
+ krb5_cc_destroy(ctx, tmp_cc);
+ krb5_free_cred_contents(ctx, &store_creds);
+ return code;
+ }
+
+ code = krb5_cc_store_cred(ctx, tmp_cc, &store_creds);
+ if (code != 0) {
+ krb5_free_cred_contents(ctx, &store_creds);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ /*
+ * we need to remember the client principal of our
+ * TGT and make sure the KDC does not return this
+ * in the impersonated tickets. This can happen
+ * if the KDC does not support S4U2Self and S4U2Proxy.
+ */
+ blacklist_principal = store_creds.client;
+ store_creds.client = NULL;
+ krb5_free_cred_contents(ctx, &store_creds);
+
+ /*
+ * Check if we also need S4U2Proxy or if S4U2Self is
+ * enough in order to get a ticket for the target.
+ */
+ if (target_service == NULL) {
+ s4u2proxy = false;
+ } else if (strcmp(target_service, self_service) == 0) {
+ s4u2proxy = false;
+ } else {
+ s4u2proxy = true;
+ }
+
+ /*
+ * For S4U2Self we need our own service principal,
+ * which belongs to our own realm (available on
+ * our client principal).
+ */
+ self_realm = krb5_principal_get_realm(ctx, init_principal);
+
+ code = krb5_parse_name(ctx, self_service, &self_princ);
+ if (code != 0) {
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ code = krb5_principal_set_realm(ctx, self_princ, self_realm);
+ if (code != 0) {
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_free_principal(ctx, self_princ);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ code = krb5_get_creds_opt_alloc(ctx, &options);
+ if (code != 0) {
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_free_principal(ctx, self_princ);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ if (s4u2proxy) {
+ /*
+ * If we want S4U2Proxy, we need the forwardable flag
+ * on the S4U2Self ticket.
+ */
+ krb5_get_creds_opt_set_options(ctx, options, KRB5_GC_FORWARDABLE);
+ }
+
+ code = krb5_get_creds_opt_set_impersonate(ctx, options,
+ impersonate_principal);
+ if (code != 0) {
+ krb5_get_creds_opt_free(ctx, options);
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_free_principal(ctx, self_princ);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ code = krb5_get_creds(ctx, options, tmp_cc,
+ self_princ, &s4u2self_creds);
+ krb5_get_creds_opt_free(ctx, options);
+ krb5_free_principal(ctx, self_princ);
+ if (code != 0) {
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ if (!s4u2proxy) {
+ krb5_cc_destroy(ctx, tmp_cc);
+
+ /*
+ * Now make sure we store the impersonated principal
+ * and creds instead of the TGT related stuff
+ * in the krb5_ccache of the caller.
+ */
+ code = krb5_copy_creds_contents(ctx, s4u2self_creds,
+ &store_creds);
+ krb5_free_creds(ctx, s4u2self_creds);
+ if (code != 0) {
+ return code;
+ }
+
+ /*
+ * It's important to store the principal the KDC
+ * returned, as otherwise the caller would not find
+ * the S4U2Self ticket in the krb5_ccache lookup.
+ */
+ store_principal = store_creds.client;
+ goto store;
+ }
+
+ /*
+ * We are trying S4U2Proxy:
+ *
+ * We need the ticket from the S4U2Self step
+ * and our TGT in order to get the delegated ticket.
+ */
+ code = decode_Ticket((const uint8_t *)s4u2self_creds->ticket.data,
+ s4u2self_creds->ticket.length,
+ &s4u2self_ticket,
+ &s4u2self_ticketlen);
+ if (code != 0) {
+ krb5_free_creds(ctx, s4u2self_creds);
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ /*
+ * we need to remember the client principal of the
+ * S4U2Self stage and as it needs to match the one we
+ * will get for the S4U2Proxy stage. We need this
+ * in order to detect KDCs which does not support S4U2Proxy.
+ */
+ whitelist_principal = s4u2self_creds->client;
+ s4u2self_creds->client = NULL;
+ krb5_free_creds(ctx, s4u2self_creds);
+
+ /*
+ * For S4U2Proxy we also got a target service principal,
+ * which also belongs to our own realm (available on
+ * our client principal).
+ */
+ code = krb5_parse_name(ctx, target_service, &target_princ);
+ if (code != 0) {
+ free_Ticket(&s4u2self_ticket);
+ krb5_free_principal(ctx, whitelist_principal);
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ code = krb5_principal_set_realm(ctx, target_princ, self_realm);
+ if (code != 0) {
+ free_Ticket(&s4u2self_ticket);
+ krb5_free_principal(ctx, target_princ);
+ krb5_free_principal(ctx, whitelist_principal);
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ code = krb5_get_creds_opt_alloc(ctx, &options);
+ if (code != 0) {
+ free_Ticket(&s4u2self_ticket);
+ krb5_free_principal(ctx, target_princ);
+ krb5_free_principal(ctx, whitelist_principal);
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ krb5_get_creds_opt_set_options(ctx, options, KRB5_GC_FORWARDABLE);
+ krb5_get_creds_opt_set_options(ctx, options, KRB5_GC_CONSTRAINED_DELEGATION);
+
+ code = krb5_get_creds_opt_set_ticket(ctx, options, &s4u2self_ticket);
+ free_Ticket(&s4u2self_ticket);
+ if (code != 0) {
+ krb5_get_creds_opt_free(ctx, options);
+ krb5_free_principal(ctx, target_princ);
+ krb5_free_principal(ctx, whitelist_principal);
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_cc_destroy(ctx, tmp_cc);
+ return code;
+ }
+
+ code = krb5_get_creds(ctx, options, tmp_cc,
+ target_princ, &s4u2proxy_creds);
+ krb5_get_creds_opt_free(ctx, options);
+ krb5_free_principal(ctx, target_princ);
+ krb5_cc_destroy(ctx, tmp_cc);
+ if (code != 0) {
+ krb5_free_principal(ctx, whitelist_principal);
+ krb5_free_principal(ctx, blacklist_principal);
+ return code;
+ }
+
+ /*
+ * Now make sure we store the impersonated principal
+ * and creds instead of the TGT related stuff
+ * in the krb5_ccache of the caller.
+ */
+ code = krb5_copy_creds_contents(ctx, s4u2proxy_creds,
+ &store_creds);
+ krb5_free_creds(ctx, s4u2proxy_creds);
+ if (code != 0) {
+ krb5_free_principal(ctx, whitelist_principal);
+ krb5_free_principal(ctx, blacklist_principal);
+ return code;
+ }
+
+ /*
+ * It's important to store the principal the KDC
+ * returned, as otherwise the caller would not find
+ * the S4U2Self ticket in the krb5_ccache lookup.
+ */
+ store_principal = store_creds.client;
+
+ store:
+ if (blacklist_principal &&
+ krb5_principal_compare(ctx, store_creds.client, blacklist_principal)) {
+ char *sp = NULL;
+ char *ip = NULL;
+
+ code = krb5_unparse_name(ctx, blacklist_principal, &sp);
+ if (code != 0) {
+ sp = NULL;
+ }
+ code = krb5_unparse_name(ctx, impersonate_principal, &ip);
+ if (code != 0) {
+ ip = NULL;
+ }
+ DBG_WARNING("KDC returned self principal[%s] while impersonating [%s]\n",
+ sp?sp:"<no memory>",
+ ip?ip:"<no memory>");
+
+ SAFE_FREE(sp);
+ SAFE_FREE(ip);
+
+ krb5_free_principal(ctx, whitelist_principal);
+ krb5_free_principal(ctx, blacklist_principal);
+ krb5_free_cred_contents(ctx, &store_creds);
+ return KRB5_FWD_BAD_PRINCIPAL;
+ }
+ if (blacklist_principal) {
+ krb5_free_principal(ctx, blacklist_principal);
+ }
+
+ if (whitelist_principal &&
+ !krb5_principal_compare(ctx, store_creds.client, whitelist_principal)) {
+ char *sp = NULL;
+ char *ep = NULL;
+
+ code = krb5_unparse_name(ctx, store_creds.client, &sp);
+ if (code != 0) {
+ sp = NULL;
+ }
+ code = krb5_unparse_name(ctx, whitelist_principal, &ep);
+ if (code != 0) {
+ ep = NULL;
+ }
+ DBG_WARNING("KDC returned wrong principal[%s] we expected [%s]\n",
+ sp?sp:"<no memory>",
+ ep?ep:"<no memory>");
+
+ SAFE_FREE(sp);
+ SAFE_FREE(ep);
+
+ krb5_free_principal(ctx, whitelist_principal);
+ krb5_free_cred_contents(ctx, &store_creds);
+ return KRB5_FWD_BAD_PRINCIPAL;
+ }
+ if (whitelist_principal) {
+ krb5_free_principal(ctx, whitelist_principal);
+ }
+
+ code = krb5_cc_initialize(ctx, store_cc, store_principal);
+ if (code != 0) {
+ krb5_free_cred_contents(ctx, &store_creds);
+ return code;
+ }
+
+ code = krb5_cc_store_cred(ctx, store_cc, &store_creds);
+ if (code != 0) {
+ krb5_free_cred_contents(ctx, &store_creds);
+ return code;
+ }
+
+ client_realm = krb5_principal_get_realm(ctx, store_creds.client);
+ if (client_realm != NULL) {
+ /*
+ * Because the CANON flag doesn't have any impact
+ * on the impersonate_principal => store_creds.client
+ * realm mapping. We need to store the credentials twice,
+ * once with the returned realm and once with the
+ * realm of impersonate_principal.
+ */
+ code = krb5_principal_set_realm(ctx, store_creds.server,
+ client_realm);
+ if (code != 0) {
+ krb5_free_cred_contents(ctx, &store_creds);
+ return code;
+ }
+
+ code = krb5_cc_store_cred(ctx, store_cc, &store_creds);
+ if (code != 0) {
+ krb5_free_cred_contents(ctx, &store_creds);
+ return code;
+ }
+ }
+
+ if (expire_time) {
+ *expire_time = (time_t) store_creds.times.endtime;
+ }
+
+ if (kdc_time) {
+ *kdc_time = (time_t) store_creds.times.starttime;
+ }
+
+ krb5_free_cred_contents(ctx, &store_creds);
+
+ return 0;
+}
+
+#else /* MIT */
+
+static bool princ_compare_no_dollar(krb5_context ctx,
+ krb5_principal a,
+ krb5_principal b)
+{
+ krb5_principal mod = NULL;
+ bool cmp;
+
+ if (a->length == 1 && b->length == 1 &&
+ a->data[0].length != 0 && b->data[0].length != 0 &&
+ a->data[0].data[a->data[0].length - 1] !=
+ b->data[0].data[b->data[0].length - 1]) {
+ if (a->data[0].data[a->data[0].length - 1] == '$') {
+ mod = a;
+ mod->data[0].length--;
+ } else if (b->data[0].data[b->data[0].length - 1] == '$') {
+ mod = b;
+ mod->data[0].length--;
+ }
+ }
+
+ cmp = krb5_principal_compare_flags(ctx,
+ a,
+ b,
+ KRB5_PRINCIPAL_COMPARE_CASEFOLD);
+ if (mod != NULL) {
+ mod->data[0].length++;
+ }
+
+ return cmp;
+}
+
+krb5_error_code smb_krb5_kinit_s4u2_ccache(krb5_context ctx,
+ krb5_ccache store_cc,
+ krb5_principal init_principal,
+ const char *init_password,
+ krb5_principal impersonate_principal,
+ const char *self_service,
+ const char *target_service,
+ krb5_get_init_creds_opt *krb_options,
+ time_t *expire_time,
+ time_t *kdc_time)
+{
+ krb5_error_code code;
+ krb5_principal self_princ = NULL;
+ krb5_principal target_princ = NULL;
+ krb5_creds *store_creds = NULL;
+ krb5_creds *s4u2self_creds = NULL;
+ krb5_creds *s4u2proxy_creds = NULL;
+ krb5_creds init_creds = {0};
+ krb5_creds mcreds = {0};
+ krb5_flags options = KRB5_GC_NO_STORE;
+ krb5_ccache tmp_cc;
+ bool s4u2proxy = false;
+ bool ok;
+
+ code = krb5_cc_new_unique(ctx, "MEMORY", NULL, &tmp_cc);
+ if (code != 0) {
+ return code;
+ }
+
+ code = krb5_get_init_creds_password(ctx,
+ &init_creds,
+ init_principal,
+ init_password,
+ NULL,
+ NULL,
+ 0,
+ NULL,
+ krb_options);
+ if (code != 0) {
+ goto done;
+ }
+
+ code = krb5_cc_initialize(ctx, tmp_cc, init_creds.client);
+ if (code != 0) {
+ goto done;
+ }
+
+ code = krb5_cc_store_cred(ctx, tmp_cc, &init_creds);
+ if (code != 0) {
+ goto done;
+ }
+
+ /*
+ * Check if we also need S4U2Proxy or if S4U2Self is
+ * enough in order to get a ticket for the target.
+ */
+ if (target_service == NULL) {
+ s4u2proxy = false;
+ } else if (strcmp(target_service, self_service) == 0) {
+ s4u2proxy = false;
+ } else {
+ s4u2proxy = true;
+ }
+
+ code = krb5_parse_name(ctx, self_service, &self_princ);
+ if (code != 0) {
+ goto done;
+ }
+
+ /*
+ * MIT lacks aliases support in S4U, for S4U2Self we require the tgt
+ * client and the request server to be the same principal name.
+ */
+ ok = princ_compare_no_dollar(ctx, init_creds.client, self_princ);
+ if (!ok) {
+ code = KRB5KDC_ERR_PADATA_TYPE_NOSUPP;
+ goto done;
+ }
+
+ mcreds.client = impersonate_principal;
+ mcreds.server = init_creds.client;
+
+ code = krb5_get_credentials_for_user(ctx, options, tmp_cc, &mcreds,
+ NULL, &s4u2self_creds);
+ if (code != 0) {
+ goto done;
+ }
+
+ if (s4u2proxy) {
+ code = krb5_parse_name(ctx, target_service, &target_princ);
+ if (code != 0) {
+ goto done;
+ }
+
+ mcreds.client = init_creds.client;
+ mcreds.server = target_princ;
+ mcreds.second_ticket = s4u2self_creds->ticket;
+
+ code = krb5_get_credentials(ctx, options |
+ KRB5_GC_CONSTRAINED_DELEGATION,
+ tmp_cc, &mcreds, &s4u2proxy_creds);
+ if (code != 0) {
+ goto done;
+ }
+
+ /* Check KDC support of S4U2Proxy extension */
+ if (!krb5_principal_compare(ctx, s4u2self_creds->client,
+ s4u2proxy_creds->client)) {
+ code = KRB5KDC_ERR_PADATA_TYPE_NOSUPP;
+ goto done;
+ }
+
+ store_creds = s4u2proxy_creds;
+ } else {
+ store_creds = s4u2self_creds;;
+
+ /* We need to save the ticket with the requested server name
+ * or the caller won't be able to find it in cache. */
+ if (!krb5_principal_compare(ctx, self_princ,
+ store_creds->server)) {
+ krb5_free_principal(ctx, store_creds->server);
+ store_creds->server = NULL;
+ code = krb5_copy_principal(ctx, self_princ,
+ &store_creds->server);
+ if (code != 0) {
+ goto done;
+ }
+ }
+ }
+
+ code = krb5_cc_initialize(ctx, store_cc, store_creds->client);
+ if (code != 0) {
+ goto done;
+ }
+
+ code = krb5_cc_store_cred(ctx, store_cc, store_creds);
+ if (code != 0) {
+ goto done;
+ }
+
+ if (expire_time) {
+ *expire_time = (time_t) store_creds->times.endtime;
+ }
+
+ if (kdc_time) {
+ *kdc_time = (time_t) store_creds->times.starttime;
+ }
+
+done:
+ krb5_cc_destroy(ctx, tmp_cc);
+ krb5_free_cred_contents(ctx, &init_creds);
+ krb5_free_creds(ctx, s4u2self_creds);
+ krb5_free_creds(ctx, s4u2proxy_creds);
+ krb5_free_principal(ctx, self_princ);
+ krb5_free_principal(ctx, target_princ);
+
+ return code;
+}
+#endif
+
+#if !defined(HAVE_KRB5_MAKE_PRINCIPAL) && defined(HAVE_KRB5_BUILD_PRINCIPAL_ALLOC_VA)
+/**
+ * @brief Create a principal name using a variable argument list.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[inout] principal A pointer to the principal structure.
+ *
+ * @param[in] _realm The realm to use. If NULL then the function will
+ * get the default realm name.
+ *
+ * @param[in] ... A list of 'char *' components, ending with NULL.
+ *
+ * Use krb5_free_principal() to free the principal when it is no longer needed.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_make_principal(krb5_context context,
+ krb5_principal *principal,
+ const char *_realm, ...)
+{
+ krb5_error_code code;
+ bool free_realm;
+ char *realm;
+ va_list ap;
+
+ if (_realm) {
+ realm = discard_const_p(char, _realm);
+ free_realm = false;
+ } else {
+ code = krb5_get_default_realm(context, &realm);
+ if (code) {
+ return code;
+ }
+ free_realm = true;
+ }
+
+ va_start(ap, _realm);
+ code = krb5_build_principal_alloc_va(context, principal,
+ strlen(realm), realm,
+ ap);
+ va_end(ap);
+
+ if (free_realm) {
+ krb5_free_default_realm(context, realm);
+ }
+
+ return code;
+}
+#endif
+
+#if !defined(HAVE_KRB5_CC_GET_LIFETIME) && defined(HAVE_KRB5_CC_RETRIEVE_CRED)
+/**
+ * @brief Get the lifetime of the initial ticket in the cache.
+ *
+ * @param[in] context The kerberos context.
+ *
+ * @param[in] id The credential cache to get the ticket lifetime.
+ *
+ * @param[out] t A pointer to a time value to store the lifetime.
+ *
+ * @return 0 on success, a krb5_error_code on error.
+ */
+krb5_error_code smb_krb5_cc_get_lifetime(krb5_context context,
+ krb5_ccache id,
+ time_t *t)
+{
+ krb5_cc_cursor cursor;
+ krb5_error_code kerr;
+ krb5_creds cred;
+ krb5_timestamp now;
+
+ *t = 0;
+
+ kerr = krb5_timeofday(context, &now);
+ if (kerr) {
+ return kerr;
+ }
+
+ kerr = krb5_cc_start_seq_get(context, id, &cursor);
+ if (kerr) {
+ return kerr;
+ }
+
+ while ((kerr = krb5_cc_next_cred(context, id, &cursor, &cred)) == 0) {
+#ifndef HAVE_FLAGS_IN_KRB5_CREDS
+ if (cred.ticket_flags & TKT_FLG_INITIAL) {
+#else
+ if (cred.flags.b.initial) {
+#endif
+ if (now < cred.times.endtime) {
+ *t = (time_t) (cred.times.endtime - now);
+ }
+ krb5_free_cred_contents(context, &cred);
+ break;
+ }
+ krb5_free_cred_contents(context, &cred);
+ }
+
+ krb5_cc_end_seq_get(context, id, &cursor);
+
+ return kerr;
+}
+#endif /* HAVE_KRB5_CC_GET_LIFETIME */
+
+#if !defined(HAVE_KRB5_FREE_CHECKSUM_CONTENTS) && defined(HAVE_FREE_CHECKSUM)
+void smb_krb5_free_checksum_contents(krb5_context ctx, krb5_checksum *cksum)
+{
+ free_Checksum(cksum);
+}
+#endif
+
+/**
+ * @brief Compute a checksum operating on a keyblock.
+ *
+ * This function computes a checksum over a PAC using the keyblock for a keyed
+ * checksum.
+ *
+ * @param[in] mem_ctx A talloc context to allocate the signature on.
+ *
+ * @param[in] pac_data The PAC as input.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] keyblock Encryption key for a keyed checksum.
+ *
+ * @param[out] sig_type The checksum type
+ *
+ * @param[out] sig_blob The talloc'ed checksum
+ *
+ * The caller must free the sig_blob with talloc_free() when it is not needed
+ * anymore.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_make_pac_checksum(TALLOC_CTX *mem_ctx,
+ DATA_BLOB *pac_data,
+ krb5_context context,
+ const krb5_keyblock *keyblock,
+ uint32_t *sig_type,
+ DATA_BLOB *sig_blob)
+{
+ krb5_error_code ret;
+ krb5_checksum cksum;
+#if defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CREATE_CHECKSUM)
+ krb5_crypto crypto;
+
+
+ ret = krb5_crypto_init(context,
+ keyblock,
+ 0,
+ &crypto);
+ if (ret) {
+ DEBUG(0,("krb5_crypto_init() failed: %s\n",
+ smb_get_krb5_error_message(context, ret, mem_ctx)));
+ return ret;
+ }
+ ret = krb5_create_checksum(context,
+ crypto,
+ KRB5_KU_OTHER_CKSUM,
+ 0,
+ pac_data->data,
+ pac_data->length,
+ &cksum);
+ if (ret) {
+ DEBUG(2, ("PAC Verification failed: %s\n",
+ smb_get_krb5_error_message(context, ret, mem_ctx)));
+ }
+
+ krb5_crypto_destroy(context, crypto);
+
+ if (ret) {
+ return ret;
+ }
+
+ *sig_type = cksum.cksumtype;
+ *sig_blob = data_blob_talloc(mem_ctx,
+ cksum.checksum.data,
+ cksum.checksum.length);
+#elif defined(HAVE_KRB5_C_MAKE_CHECKSUM)
+ krb5_data input;
+
+ input.data = (char *)pac_data->data;
+ input.length = pac_data->length;
+
+ ret = krb5_c_make_checksum(context,
+ 0,
+ keyblock,
+ KRB5_KEYUSAGE_APP_DATA_CKSUM,
+ &input,
+ &cksum);
+ if (ret) {
+ DEBUG(2, ("PAC Verification failed: %s\n",
+ smb_get_krb5_error_message(context, ret, mem_ctx)));
+ return ret;
+ }
+
+ *sig_type = cksum.checksum_type;
+ *sig_blob = data_blob_talloc(mem_ctx,
+ cksum.contents,
+ cksum.length);
+
+#else
+#error krb5_create_checksum or krb5_c_make_checksum not available
+#endif /* HAVE_KRB5_C_MAKE_CHECKSUM */
+ smb_krb5_free_checksum_contents(context, &cksum);
+
+ return 0;
+}
+
+
+/**
+ * @brief Get realm of a principal
+ *
+ * @param[in] mem_ctx The talloc ctx to put the result on
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] principal The principal to get the realm from.
+ *
+ * @return A talloced string with the realm or NULL if an error occurred.
+ */
+char *smb_krb5_principal_get_realm(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_const_principal principal)
+{
+#ifdef HAVE_KRB5_PRINCIPAL_GET_REALM /* Heimdal */
+ const char *realm = NULL;
+
+ realm = krb5_principal_get_realm(context, principal);
+ if (realm == NULL) {
+ return NULL;
+ }
+
+ return talloc_strdup(mem_ctx, realm);
+#elif defined(krb5_princ_realm) /* MIT */
+ const krb5_data *realm = NULL;
+
+ realm = krb5_princ_realm(context, principal);
+ if (realm == NULL) {
+ return NULL;
+ }
+
+ return talloc_strndup(mem_ctx, realm->data, realm->length);
+#else
+#error UNKNOWN_GET_PRINC_REALM_FUNCTIONS
+#endif
+}
+
+/**
+ * @brief Get realm of a principal
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] principal The principal to set the realm
+ *
+ * @param[in] realm The realm as a string to set.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_principal_set_realm(krb5_context context,
+ krb5_principal principal,
+ const char *realm)
+{
+#ifdef HAVE_KRB5_PRINCIPAL_SET_REALM /* Heimdal */
+ return krb5_principal_set_realm(context, principal, realm);
+#elif defined(krb5_princ_realm) && defined(krb5_princ_set_realm) /* MIT */
+ krb5_error_code ret;
+ krb5_data data;
+ krb5_data *old_data;
+
+ old_data = krb5_princ_realm(context, principal);
+
+ ret = smb_krb5_copy_data_contents(&data,
+ realm,
+ strlen(realm));
+ if (ret) {
+ return ret;
+ }
+
+ /* free realm before setting */
+ free(old_data->data);
+
+ krb5_princ_set_realm(context, principal, &data);
+
+ return ret;
+#else
+#error UNKNOWN_PRINC_SET_REALM_FUNCTION
+#endif
+}
+
+
+/**
+ * @brief Get the realm from the service hostname.
+ *
+ * This function will look for a domain realm mapping in the [domain_realm]
+ * section of the krb5.conf first and fallback to extract the realm from
+ * the provided service hostname. As a last resort it will return the
+ * provided client_realm.
+ *
+ * @param[in] mem_ctx The talloc context
+ *
+ * @param[in] hostname The service hostname
+ *
+ * @param[in] client_realm If we can not find a mapping, fall back to
+ * this realm.
+ *
+ * @return The realm to use for the service hostname, NULL if a fatal error
+ * occurred.
+ */
+char *smb_krb5_get_realm_from_hostname(TALLOC_CTX *mem_ctx,
+ const char *hostname,
+ const char *client_realm)
+{
+#if defined(HAVE_KRB5_REALM_TYPE)
+ /* Heimdal. */
+ krb5_realm *realm_list = NULL;
+#else
+ /* MIT */
+ char **realm_list = NULL;
+#endif
+ char *realm = NULL;
+ krb5_error_code kerr;
+ krb5_context ctx = NULL;
+
+ kerr = smb_krb5_init_context_common(&ctx);
+ if (kerr) {
+ DBG_ERR("kerberos init context failed (%s)\n",
+ error_message(kerr));
+ return NULL;
+ }
+
+ kerr = krb5_get_host_realm(ctx, hostname, &realm_list);
+ if (kerr == KRB5_ERR_HOST_REALM_UNKNOWN) {
+ realm_list = NULL;
+ kerr = 0;
+ }
+ if (kerr != 0) {
+ DEBUG(3,("kerberos_get_realm_from_hostname %s: "
+ "failed %s\n",
+ hostname ? hostname : "(NULL)",
+ error_message(kerr) ));
+ goto out;
+ }
+
+ if (realm_list != NULL &&
+ realm_list[0] != NULL &&
+ realm_list[0][0] != '\0') {
+ realm = talloc_strdup(mem_ctx, realm_list[0]);
+ if (realm == NULL) {
+ goto out;
+ }
+ } else {
+ const char *p = NULL;
+
+ /*
+ * "dc6.samba2003.example.com"
+ * returns a realm of "SAMBA2003.EXAMPLE.COM"
+ *
+ * "dc6." returns realm as NULL
+ */
+ p = strchr_m(hostname, '.');
+ if (p != NULL && p[1] != '\0') {
+ realm = talloc_strdup_upper(mem_ctx, p + 1);
+ if (realm == NULL) {
+ goto out;
+ }
+ }
+ }
+
+ if (realm == NULL) {
+ realm = talloc_strdup(mem_ctx, client_realm);
+ }
+
+ out:
+
+ if (ctx) {
+ if (realm_list) {
+ krb5_free_host_realm(ctx, realm_list);
+ realm_list = NULL;
+ }
+ krb5_free_context(ctx);
+ ctx = NULL;
+ }
+ return realm;
+}
+
+/**
+ * @brief Get an error string from a Kerberos error code.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] code The Kerberos error code.
+ *
+ * @param[in] mem_ctx The talloc context to allocate the error string on.
+ *
+ * @return A talloc'ed error string or NULL if an error occurred.
+ *
+ * The caller must free the returned error string with talloc_free() if not
+ * needed anymore
+ */
+char *smb_get_krb5_error_message(krb5_context context,
+ krb5_error_code code,
+ TALLOC_CTX *mem_ctx)
+{
+ char *ret;
+
+#if defined(HAVE_KRB5_GET_ERROR_MESSAGE) && defined(HAVE_KRB5_FREE_ERROR_MESSAGE)
+ const char *context_error = krb5_get_error_message(context, code);
+ if (context_error) {
+ ret = talloc_asprintf(mem_ctx, "%s: %s",
+ error_message(code), context_error);
+ krb5_free_error_message(context, context_error);
+ return ret;
+ }
+#endif
+ ret = talloc_strdup(mem_ctx, error_message(code));
+ return ret;
+}
+
+/**
+ * @brief Return the type of a krb5_principal
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] principal The principal to get the type from.
+ *
+ * @return The integer type of the principal.
+ */
+int smb_krb5_principal_get_type(krb5_context context,
+ krb5_const_principal principal)
+{
+#ifdef HAVE_KRB5_PRINCIPAL_GET_TYPE /* Heimdal */
+ return krb5_principal_get_type(context, principal);
+#elif defined(krb5_princ_type) /* MIT */
+ return krb5_princ_type(context, principal);
+#else
+#error UNKNOWN_PRINC_GET_TYPE_FUNCTION
+#endif
+}
+
+/**
+ * @brief Set the type of a principal
+ *
+ * @param[in] context The library context
+ *
+ * @param[inout] principal The principal to set the type for.
+ *
+ * @param[in] type The principal type to set.
+ */
+void smb_krb5_principal_set_type(krb5_context context,
+ krb5_principal principal,
+ int type)
+{
+#ifdef HAVE_KRB5_PRINCIPAL_SET_TYPE /* Heimdal */
+ krb5_principal_set_type(context, principal, type);
+#elif defined(krb5_princ_type) /* MIT */
+ krb5_princ_type(context, principal) = type;
+#else
+#error UNKNOWN_PRINC_SET_TYPE_FUNCTION
+#endif
+}
+
+/**
+ * @brief Check if a principal is a TGS
+ *
+ * @param[in] context The library context
+ *
+ * @param[inout] principal The principal to check.
+ *
+ * @returns 1 if equal, 0 if not and -1 on error.
+ */
+int smb_krb5_principal_is_tgs(krb5_context context,
+ krb5_const_principal principal)
+{
+ char *p = NULL;
+ int eq = 1;
+ krb5_error_code ret = 0;
+
+ if (krb5_princ_size(context, principal) > 2) {
+ return 0;
+ }
+
+ ret = smb_krb5_principal_get_comp_string(NULL, context, principal, 0, &p);
+ if (ret == ENOENT) {
+ return 0;
+ } else if (ret) {
+ return -1;
+ }
+
+ eq = strcmp(p, KRB5_TGS_NAME) == 0;
+
+ talloc_free(p);
+
+ return eq;
+}
+
+#if !defined(HAVE_KRB5_WARNX)
+/**
+ * @brief Log a Kerberos message
+ *
+ * It sends the message to com_err.
+ *
+ * @param[in] context The library context
+ *
+ * @param[in] fmt The message format
+ *
+ * @param[in] ... The message arguments
+ *
+ * @return 0 on success.
+ */
+krb5_error_code krb5_warnx(krb5_context context, const char *fmt, ...)
+{
+ va_list args;
+
+ va_start(args, fmt);
+ com_err_va("samba-kdc", errno, fmt, args);
+ va_end(args);
+
+ return 0;
+}
+#endif
+
+/**
+ * @brief Copy a credential cache.
+ *
+ * @param[in] context The library context.
+ *
+ * @param[in] incc Credential cache to be copied.
+ *
+ * @param[inout] outcc Copy of credential cache to be filled in.
+ *
+ * @return 0 on success, a Kerberos error code otherwise.
+ */
+krb5_error_code smb_krb5_cc_copy_creds(krb5_context context,
+ krb5_ccache incc, krb5_ccache outcc)
+{
+#ifdef HAVE_KRB5_CC_COPY_CACHE /* Heimdal */
+ return krb5_cc_copy_cache(context, incc, outcc);
+#elif defined(HAVE_KRB5_CC_COPY_CREDS)
+ krb5_error_code ret;
+ krb5_principal princ = NULL;
+
+ ret = krb5_cc_get_principal(context, incc, &princ);
+ if (ret != 0) {
+ return ret;
+ }
+ ret = krb5_cc_initialize(context, outcc, princ);
+ krb5_free_principal(context, princ);
+ if (ret != 0) {
+ return ret;
+ }
+ return krb5_cc_copy_creds(context, incc, outcc);
+#else
+#error UNKNOWN_KRB5_CC_COPY_CACHE_OR_CREDS_FUNCTION
+#endif
+}
+
+/**********************************************************
+ * ADS KRB5 CALLS
+ **********************************************************/
+
+static bool ads_cleanup_expired_creds(krb5_context context,
+ krb5_ccache ccache,
+ krb5_creds *credsp)
+{
+ krb5_error_code retval;
+ const char *cc_type = krb5_cc_get_type(context, ccache);
+
+ DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
+ cc_type, krb5_cc_get_name(context, ccache),
+ http_timestring(talloc_tos(), credsp->times.endtime)));
+
+ /* we will probably need new tickets if the current ones
+ will expire within 10 seconds.
+ */
+ if (credsp->times.endtime >= (time(NULL) + 10))
+ return false;
+
+ /* heimdal won't remove creds from a file ccache, and
+ perhaps we shouldn't anyway, since internally we
+ use memory ccaches, and a FILE one probably means that
+ we're using creds obtained outside of our executable
+ */
+ if (strequal(cc_type, "FILE")) {
+ DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
+ return false;
+ }
+
+ retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
+ if (retval) {
+ DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
+ error_message(retval)));
+ /* If we have an error in this, we want to display it,
+ but continue as though we deleted it */
+ }
+ return true;
+}
+
+/* Allocate and setup the auth context into the state we need. */
+
+static krb5_error_code ads_setup_auth_context(krb5_context context,
+ krb5_auth_context *auth_context)
+{
+ krb5_error_code retval;
+
+ retval = krb5_auth_con_init(context, auth_context );
+ if (retval) {
+ DEBUG(1,("krb5_auth_con_init failed (%s)\n",
+ error_message(retval)));
+ return retval;
+ }
+
+ /* Ensure this is an addressless ticket. */
+ retval = krb5_auth_con_setaddrs(context, *auth_context, NULL, NULL);
+ if (retval) {
+ DEBUG(1,("krb5_auth_con_setaddrs failed (%s)\n",
+ error_message(retval)));
+ }
+
+ return retval;
+}
+
+#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE)
+static krb5_error_code ads_create_gss_checksum(krb5_data *in_data, /* [inout] */
+ uint32_t gss_flags)
+{
+ unsigned int orig_length = in_data->length;
+ unsigned int base_cksum_size = GSSAPI_CHECKSUM_SIZE;
+ char *gss_cksum = NULL;
+
+ if (orig_length) {
+ /* Extra length field for delegated ticket. */
+ base_cksum_size += 4;
+ }
+
+ if ((unsigned int)base_cksum_size + orig_length <
+ (unsigned int)base_cksum_size) {
+ return EINVAL;
+ }
+
+ gss_cksum = (char *)SMB_MALLOC(base_cksum_size + orig_length);
+ if (gss_cksum == NULL) {
+ return ENOMEM;
+ }
+
+ memset(gss_cksum, '\0', base_cksum_size + orig_length);
+ SIVAL(gss_cksum, 0, GSSAPI_BNDLENGTH);
+
+ /*
+ * GSS_C_NO_CHANNEL_BINDINGS means 16 zero bytes.
+ * This matches the behavior of heimdal and mit.
+ *
+ * And it is needed to work against some closed source
+ * SMB servers.
+ *
+ * See bug #7883
+ */
+ memset(&gss_cksum[4], 0x00, GSSAPI_BNDLENGTH);
+
+ SIVAL(gss_cksum, 20, gss_flags);
+
+ if (orig_length && in_data->data != NULL) {
+ SSVAL(gss_cksum, 24, 1); /* The Delegation Option identifier */
+ SSVAL(gss_cksum, 26, orig_length);
+ /* Copy the kerberos KRB_CRED data */
+ memcpy(gss_cksum + 28, in_data->data, orig_length);
+ free(in_data->data);
+ in_data->data = NULL;
+ in_data->length = 0;
+ }
+ in_data->data = gss_cksum;
+ in_data->length = base_cksum_size + orig_length;
+ return 0;
+}
+#endif
+
+/*
+ * We can't use krb5_mk_req because w2k wants the service to be in a particular
+ * format.
+ */
+static krb5_error_code ads_krb5_mk_req(krb5_context context,
+ krb5_auth_context *auth_context,
+ const krb5_flags ap_req_options,
+ const char *principal,
+ krb5_ccache ccache,
+ krb5_data *outbuf,
+ time_t *expire_time,
+ const char *impersonate_princ_s)
+{
+ krb5_error_code retval;
+ krb5_principal server;
+ krb5_principal impersonate_princ = NULL;
+ krb5_creds *credsp;
+ krb5_creds creds;
+ krb5_data in_data;
+ bool creds_ready = false;
+ int i = 0, maxtries = 3;
+ bool ok;
+
+ ZERO_STRUCT(in_data);
+
+ retval = smb_krb5_parse_name(context, principal, &server);
+ if (retval != 0) {
+ DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
+ return retval;
+ }
+
+ if (impersonate_princ_s) {
+ retval = smb_krb5_parse_name(context, impersonate_princ_s,
+ &impersonate_princ);
+ if (retval) {
+ DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", impersonate_princ_s));
+ goto cleanup_princ;
+ }
+ }
+
+ /* obtain ticket & session key */
+ ZERO_STRUCT(creds);
+ if ((retval = krb5_copy_principal(context, server, &creds.server))) {
+ DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_princ;
+ }
+
+ retval = krb5_cc_get_principal(context, ccache, &creds.client);
+ if (retval != 0) {
+ /* This can commonly fail on smbd startup with no ticket in the cache.
+ * Report at higher level than 1. */
+ DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_creds;
+ }
+
+ while (!creds_ready && (i < maxtries)) {
+
+ retval = smb_krb5_get_credentials(context,
+ ccache,
+ creds.client,
+ creds.server,
+ impersonate_princ,
+ &credsp);
+ if (retval != 0) {
+ DBG_WARNING("smb_krb5_get_credentials failed for %s "
+ "(%s)\n",
+ principal,
+ error_message(retval));
+ goto cleanup_creds;
+ }
+
+ /* cope with ticket being in the future due to clock skew */
+ if ((unsigned)credsp->times.starttime > time(NULL)) {
+ time_t t = time(NULL);
+ int time_offset =(int)((unsigned)credsp->times.starttime-t);
+ DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
+ krb5_set_real_time(context, t + time_offset + 1, 0);
+ }
+
+ ok = ads_cleanup_expired_creds(context, ccache, credsp);
+ if (!ok) {
+ creds_ready = true;
+ }
+
+ i++;
+ }
+
+ DBG_DEBUG("Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
+ principal,
+ krb5_cc_get_type(context, ccache),
+ krb5_cc_get_name(context, ccache),
+ http_timestring(talloc_tos(),
+ (unsigned)credsp->times.endtime),
+ (unsigned)credsp->times.endtime);
+
+ if (expire_time) {
+ *expire_time = (time_t)credsp->times.endtime;
+ }
+
+ /* Allocate the auth_context. */
+ retval = ads_setup_auth_context(context, auth_context);
+ if (retval != 0) {
+ DBG_WARNING("ads_setup_auth_context failed (%s)\n",
+ error_message(retval));
+ goto cleanup_creds;
+ }
+
+#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE)
+ {
+ uint32_t gss_flags = 0;
+
+ if (credsp->ticket_flags & TKT_FLG_OK_AS_DELEGATE) {
+ /*
+ * Fetch a forwarded TGT from the KDC so that we can
+ * hand off a 2nd ticket as part of the kerberos
+ * exchange.
+ */
+
+ DBG_INFO("Server marked as OK to delegate to, building "
+ "forwardable TGT\n");
+
+ retval = krb5_auth_con_setuseruserkey(context,
+ *auth_context,
+ &credsp->keyblock );
+ if (retval != 0) {
+ DBG_WARNING("krb5_auth_con_setuseruserkey "
+ "failed (%s)\n",
+ error_message(retval));
+ goto cleanup_creds;
+ }
+
+ /* Must use a subkey for forwarded tickets. */
+ retval = krb5_auth_con_setflags(context,
+ *auth_context,
+ KRB5_AUTH_CONTEXT_USE_SUBKEY);
+ if (retval != 0) {
+ DBG_WARNING("krb5_auth_con_setflags failed (%s)\n",
+ error_message(retval));
+ goto cleanup_creds;
+ }
+
+ retval = krb5_fwd_tgt_creds(context,/* Krb5 context [in] */
+ *auth_context, /* Authentication context [in] */
+ discard_const_p(char, KRB5_TGS_NAME), /* Ticket service name ("krbtgt") [in] */
+ credsp->client, /* Client principal for the tgt [in] */
+ credsp->server, /* Server principal for the tgt [in] */
+ ccache, /* Credential cache to use for storage [in] */
+ 1, /* Turn on for "Forwardable ticket" [in] */
+ &in_data ); /* Resulting response [out] */
+
+ if (retval) {
+ DBG_INFO("krb5_fwd_tgt_creds failed (%s)\n",
+ error_message(retval));
+
+ /*
+ * This is not fatal. Delete the *auth_context and continue
+ * with krb5_mk_req_extended to get a non-forwardable ticket.
+ */
+
+ if (in_data.data) {
+ free( in_data.data );
+ in_data.data = NULL;
+ in_data.length = 0;
+ }
+ krb5_auth_con_free(context, *auth_context);
+ *auth_context = NULL;
+ retval = ads_setup_auth_context(context, auth_context);
+ if (retval != 0) {
+ DBG_WARNING("ads_setup_auth_context failed (%s)\n",
+ error_message(retval));
+ goto cleanup_creds;
+ }
+ } else {
+ /* We got a delegated ticket. */
+ gss_flags |= GSS_C_DELEG_FLAG;
+ }
+ }
+
+ /* Frees and reallocates in_data into a GSS checksum blob. */
+ retval = ads_create_gss_checksum(&in_data, gss_flags);
+ if (retval != 0) {
+ goto cleanup_data;
+ }
+
+ /* We always want GSS-checksum types. */
+ retval = krb5_auth_con_set_req_cksumtype(context, *auth_context, GSSAPI_CHECKSUM );
+ if (retval != 0) {
+ DEBUG(1,("krb5_auth_con_set_req_cksumtype failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_data;
+ }
+ }
+#endif
+
+ retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
+ &in_data, credsp, outbuf);
+ if (retval != 0) {
+ DBG_WARNING("krb5_mk_req_extended failed (%s)\n",
+ error_message(retval));
+ }
+
+#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE)
+cleanup_data:
+#endif
+
+ if (in_data.data) {
+ free( in_data.data );
+ in_data.length = 0;
+ }
+
+ krb5_free_creds(context, credsp);
+
+cleanup_creds:
+ krb5_free_cred_contents(context, &creds);
+
+cleanup_princ:
+ krb5_free_principal(context, server);
+ if (impersonate_princ) {
+ krb5_free_principal(context, impersonate_princ);
+ }
+
+ return retval;
+}
+
+/*
+ get a kerberos5 ticket for the given service
+*/
+int ads_krb5_cli_get_ticket(TALLOC_CTX *mem_ctx,
+ const char *principal,
+ time_t time_offset,
+ DATA_BLOB *ticket,
+ DATA_BLOB *session_key_krb5,
+ uint32_t extra_ap_opts, const char *ccname,
+ time_t *tgs_expire,
+ const char *impersonate_princ_s)
+{
+ krb5_error_code retval;
+ krb5_data packet;
+ krb5_context context = NULL;
+ krb5_ccache ccdef = NULL;
+ krb5_auth_context auth_context = NULL;
+ krb5_enctype enc_types[] = {
+ ENCTYPE_AES256_CTS_HMAC_SHA1_96,
+ ENCTYPE_AES128_CTS_HMAC_SHA1_96,
+ ENCTYPE_ARCFOUR_HMAC,
+ ENCTYPE_NULL};
+ bool ok;
+
+ DBG_DEBUG("Getting ticket for service [%s] using creds from [%s] "
+ "and impersonating [%s]\n",
+ principal, ccname, impersonate_princ_s);
+
+ retval = smb_krb5_init_context_common(&context);
+ if (retval != 0) {
+ DBG_ERR("kerberos init context failed (%s)\n",
+ error_message(retval));
+ goto failed;
+ }
+
+ if (time_offset != 0) {
+ krb5_set_real_time(context, time(NULL) + time_offset, 0);
+ }
+
+ retval = krb5_cc_resolve(context,
+ ccname ? ccname : krb5_cc_default_name(context),
+ &ccdef);
+ if (retval != 0) {
+ DBG_WARNING("krb5_cc_default failed (%s)\n",
+ error_message(retval));
+ goto failed;
+ }
+
+ retval = krb5_set_default_tgs_ktypes(context, enc_types);
+ if (retval != 0) {
+ DBG_WARNING("krb5_set_default_tgs_ktypes failed (%s)\n",
+ error_message(retval));
+ goto failed;
+ }
+
+ retval = ads_krb5_mk_req(context,
+ &auth_context,
+ AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
+ principal,
+ ccdef,
+ &packet,
+ tgs_expire,
+ impersonate_princ_s);
+ if (retval != 0) {
+ goto failed;
+ }
+
+ ok = smb_krb5_get_smb_session_key(mem_ctx,
+ context,
+ auth_context,
+ session_key_krb5,
+ false);
+ if (!ok) {
+ retval = ENOMEM;
+ goto failed;
+ }
+
+ *ticket = data_blob_talloc(mem_ctx, packet.data, packet.length);
+
+ smb_krb5_free_data_contents(context, &packet);
+
+failed:
+
+ if (context) {
+ if (ccdef) {
+ krb5_cc_close(context, ccdef);
+ }
+ if (auth_context) {
+ krb5_auth_con_free(context, auth_context);
+ }
+ krb5_free_context(context);
+ }
+
+ return retval;
+}
+
+#ifndef SAMBA4_USES_HEIMDAL /* MITKRB5 tracing callback */
+static void smb_krb5_trace_cb(krb5_context ctx,
+#ifdef HAVE_KRB5_TRACE_INFO
+ const krb5_trace_info *info,
+#elif defined(HAVE_KRB5_TRACE_INFO_STRUCT)
+ const struct krb5_trace_info *info,
+#else
+#error unknown krb5_trace_info
+#endif
+ void *data)
+{
+ if (info != NULL) {
+ DBGC_DEBUG(DBGC_KERBEROS, "%s", info->message);
+ }
+}
+#endif
+
+krb5_error_code smb_krb5_init_context_common(krb5_context *_krb5_context)
+{
+ krb5_error_code ret;
+ krb5_context krb5_ctx;
+
+ initialize_krb5_error_table();
+
+ ret = krb5_init_context(&krb5_ctx);
+ if (ret) {
+ DBG_ERR("Krb5 context initialization failed (%s)\n",
+ error_message(ret));
+ return ret;
+ }
+
+ /* The MIT Kerberos build relies on using the system krb5.conf file.
+ * If you really want to use another file please set KRB5_CONFIG
+ * accordingly. */
+#ifndef SAMBA4_USES_HEIMDAL
+ ret = krb5_set_trace_callback(krb5_ctx, smb_krb5_trace_cb, NULL);
+ if (ret) {
+ DBG_ERR("Failed to set MIT kerberos trace callback! (%s)\n",
+ error_message(ret));
+ }
+#endif
+
+#ifdef SAMBA4_USES_HEIMDAL
+ /* Set options in kerberos */
+ krb5_set_dns_canonicalize_hostname(krb5_ctx, false);
+#endif
+
+ *_krb5_context = krb5_ctx;
+ return 0;
+}
+
+#else /* HAVE_KRB5 */
+/* This saves a few linking headaches */
+int ads_krb5_cli_get_ticket(TALLOC_CTX *mem_ctx,
+ const char *principal,
+ time_t time_offset,
+ DATA_BLOB *ticket,
+ DATA_BLOB *session_key_krb5,
+ uint32_t extra_ap_opts, const char *ccname,
+ time_t *tgs_expire,
+ const char *impersonate_princ_s)
+{
+ DEBUG(0,("NO KERBEROS SUPPORT\n"));
+ return 1;
+}
+
+#endif /* HAVE_KRB5 */
diff --git a/lib/krb5_wrap/krb5_samba.h b/lib/krb5_wrap/krb5_samba.h
new file mode 100644
index 0000000..e158a40
--- /dev/null
+++ b/lib/krb5_wrap/krb5_samba.h
@@ -0,0 +1,443 @@
+/*
+ Unix SMB/CIFS implementation.
+ simple kerberos5 routines for active directory
+ Copyright (C) Andrew Tridgell 2001
+ Copyright (C) Luke Howard 2002-2003
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
+ Copyright (C) Guenther Deschner 2005-2009
+
+ 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/>.
+*/
+
+#ifndef _KRB5_SAMBA_H
+#define _KRB5_SAMBA_H
+
+#include "lib/util/data_blob.h"
+#include "libcli/util/ntstatus.h"
+
+#ifdef HAVE_KRB5
+
+#define KRB5_PRIVATE 1 /* this file uses PRIVATE interfaces! */
+/* this file uses DEPRECATED interfaces! */
+
+#ifdef KRB5_DEPRECATED
+#undef KRB5_DEPRECATED
+#endif
+
+#if defined(HAVE_KRB5_DEPRECATED_WITH_IDENTIFIER)
+#define KRB5_DEPRECATED 1
+#else
+#define KRB5_DEPRECATED
+#endif
+
+#include "system/kerberos.h"
+#include "system/network.h"
+
+#ifndef KRB5_ADDR_NETBIOS
+#define KRB5_ADDR_NETBIOS 0x14
+#endif
+
+#ifndef KRB5KRB_ERR_RESPONSE_TOO_BIG
+#define KRB5KRB_ERR_RESPONSE_TOO_BIG (-1765328332L)
+#endif
+
+/* Heimdal uses a slightly different name */
+#if defined(HAVE_ENCTYPE_ARCFOUR_HMAC_MD5) && !defined(HAVE_ENCTYPE_ARCFOUR_HMAC)
+#define ENCTYPE_ARCFOUR_HMAC ENCTYPE_ARCFOUR_HMAC_MD5
+#endif
+#if defined(HAVE_ENCTYPE_ARCFOUR_HMAC_MD5_56) && !defined(HAVE_ENCTYPE_ARCFOUR_HMAC_EXP)
+#define ENCTYPE_ARCFOUR_HMAC_EXP ENCTYPE_ARCFOUR_HMAC_MD5_56
+#endif
+
+/* The older versions of heimdal that don't have this
+ define don't seem to use it anyway. I'm told they
+ always use a subkey */
+#ifndef HAVE_AP_OPTS_USE_SUBKEY
+#define AP_OPTS_USE_SUBKEY 0
+#endif
+
+#ifndef KRB5_PW_SALT
+#define KRB5_PW_SALT 3
+#endif
+
+/* CKSUMTYPE_HMAC_MD5 in Heimdal
+ CKSUMTYPE_HMAC_MD5_ARCFOUR in MIT */
+#if defined(CKSUMTYPE_HMAC_MD5_ARCFOUR) && !defined(CKSUMTYPE_HMAC_MD5)
+#define CKSUMTYPE_HMAC_MD5 CKSUMTYPE_HMAC_MD5_ARCFOUR
+#endif
+
+/*
+ * CKSUMTYPE_HMAC_SHA1_96_AES_* in Heimdal
+ * CKSUMTYPE_HMAC_SHA1_96_AES* in MIT
+ */
+#if defined(CKSUMTYPE_HMAC_SHA1_96_AES128) && !defined(CKSUMTYPE_HMAC_SHA1_96_AES_128)
+#define CKSUMTYPE_HMAC_SHA1_96_AES_128 CKSUMTYPE_HMAC_SHA1_96_AES128
+#endif
+#if defined(CKSUMTYPE_HMAC_SHA1_96_AES256) && !defined(CKSUMTYPE_HMAC_SHA1_96_AES_256)
+#define CKSUMTYPE_HMAC_SHA1_96_AES_256 CKSUMTYPE_HMAC_SHA1_96_AES256
+#endif
+
+/*
+ * KRB5_KU_OTHER_ENCRYPTED in Heimdal
+ * KRB5_KEYUSAGE_APP_DATA_ENCRYPT in MIT
+ */
+#if defined(KRB5_KEYUSAGE_APP_DATA_ENCRYPT) && !defined(KRB5_KU_OTHER_ENCRYPTED)
+#define KRB5_KU_OTHER_ENCRYPTED KRB5_KEYUSAGE_APP_DATA_ENCRYPT
+#endif
+
+typedef struct {
+#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
+ krb5_address **addrs;
+#elif defined(HAVE_KRB5_ADDRESSES) /* Heimdal */
+ krb5_addresses *addrs;
+#else
+#error UNKNOWN_KRB5_ADDRESS_TYPE
+#endif /* defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) */
+} smb_krb5_addresses;
+
+#ifdef HAVE_KRB5_KEYTAB_ENTRY_KEY /* MIT */
+#define KRB5_KT_KEY(k) (&(k)->key)
+#elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK) /* Heimdal */
+#define KRB5_KT_KEY(k) (&(k)->keyblock)
+#else
+#error krb5_keytab_entry has no key or keyblock member
+#endif /* HAVE_KRB5_KEYTAB_ENTRY_KEY */
+
+/* work around broken krb5.h on sles9 */
+#ifdef SIZEOF_LONG
+#undef SIZEOF_LONG
+#endif
+
+#ifdef HAVE_KRB5_KEYBLOCK_KEYVALUE /* Heimdal */
+#define KRB5_KEY_TYPE(k) ((k)->keytype)
+#define KRB5_KEY_LENGTH(k) ((k)->keyvalue.length)
+#define KRB5_KEY_DATA(k) ((k)->keyvalue.data)
+#define KRB5_KEY_DATA_CAST void
+#else /* MIT */
+#define KRB5_KEY_TYPE(k) ((k)->enctype)
+#define KRB5_KEY_LENGTH(k) ((k)->length)
+#define KRB5_KEY_DATA(k) ((k)->contents)
+#define KRB5_KEY_DATA_CAST krb5_octet
+#endif /* HAVE_KRB5_KEYBLOCK_KEYVALUE */
+
+#ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
+#define KRB5_ERROR_CODE(k) ((k)->error_code)
+#else /* MIT */
+#define KRB5_ERROR_CODE(k) ((k)->error)
+#endif /* HAVE_E_DATA_POINTER_IN_KRB5_ERROR */
+
+#ifndef HAVE_KRB5_CONST_PAC
+#ifdef KRB5_CONST_PAC_GET_BUFFER
+typedef const struct krb5_pac_data *krb5_const_pac;
+#else
+/*
+ * Certain Heimdal versions include a version of krb5_pac_get_buffer() that is
+ * unusable in certain cases, taking a krb5_pac when a krb5_const_pac may be all
+ * that we can supply. Furthermore, MIT Kerberos doesn't declare krb5_const_pac
+ * at all. In such cases, we must declare krb5_const_pac as a non-const typedef
+ * so that the build can succeed.
+ */
+typedef struct krb5_pac_data *krb5_const_pac;
+#endif
+#endif
+
+krb5_error_code smb_krb5_parse_name(krb5_context context,
+ const char *name, /* in unix charset */
+ krb5_principal *principal);
+
+krb5_error_code smb_krb5_unparse_name(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_const_principal principal,
+ char **unix_name);
+
+krb5_error_code smb_krb5_init_context_common(krb5_context *_krb5_context);
+
+krb5_error_code krb5_set_default_tgs_ktypes(krb5_context ctx, const krb5_enctype *enc);
+
+#if defined(HAVE_KRB5_AUTH_CON_SETKEY) && !defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY)
+krb5_error_code krb5_auth_con_setuseruserkey(krb5_context context, krb5_auth_context auth_context, krb5_keyblock *keyblock);
+#endif
+
+#ifndef HAVE_KRB5_FREE_UNPARSED_NAME
+void krb5_free_unparsed_name(krb5_context ctx, char *val);
+#endif
+
+#if !defined(HAVE_KRB5_FREE_ENCTYPES)
+void krb5_free_enctypes(krb5_context context, krb5_enctype *val);
+#endif
+
+#if !defined(HAVE_KRB5_FREE_STRING)
+void krb5_free_string(krb5_context context, char *val);
+#endif
+
+/* Stub out initialize_krb5_error_table since it is not present in all
+ * Kerberos implementations. If it's not present, it's not necessary to
+ * call it.
+ */
+#ifndef HAVE_INITIALIZE_KRB5_ERROR_TABLE
+#define initialize_krb5_error_table()
+#endif
+
+/* Samba wrapper functions for krb5 functionality. */
+bool smb_krb5_sockaddr_to_kaddr(struct sockaddr_storage *paddr,
+ krb5_address *pkaddr);
+
+krb5_error_code smb_krb5_mk_error(krb5_context context,
+ krb5_error_code error_code,
+ const char *e_text,
+ krb5_data *e_data,
+ const krb5_principal client,
+ const krb5_principal server,
+ krb5_data *enc_err);
+
+krb5_error_code smb_krb5_get_allowed_etypes(krb5_context context,
+ krb5_enctype **enctypes);
+
+bool smb_krb5_get_smb_session_key(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_auth_context auth_context,
+ DATA_BLOB *session_key,
+ bool remote);
+
+krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry);
+void smb_krb5_free_data_contents(krb5_context context, krb5_data *pdata);
+krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, const char *client_string, const char *service_string, time_t *expire_time);
+krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr,
+ const char *netbios_name);
+krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr);
+krb5_enctype smb_krb5_kt_get_enctype_from_entry(krb5_keytab_entry *kt_entry);
+
+krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
+ krb5_enctype enctype,
+ char **etype_s);
+krb5_error_code smb_krb5_kt_open_relative(krb5_context context,
+ const char *keytab_name_req,
+ bool write_access,
+ krb5_keytab *keytab);
+krb5_error_code smb_krb5_kt_open(krb5_context context,
+ const char *keytab_name,
+ bool write_access,
+ krb5_keytab *keytab);
+krb5_error_code smb_krb5_kt_get_name(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_keytab keytab,
+ const char **keytab_name);
+krb5_error_code smb_krb5_kt_seek_and_delete_old_entries(krb5_context context,
+ krb5_keytab keytab,
+ bool keep_old_kvno,
+ krb5_kvno kvno,
+ bool enctype_only,
+ krb5_enctype enctype,
+ const char *princ_s,
+ krb5_principal princ,
+ bool flush);
+krb5_error_code smb_krb5_kt_add_entry(krb5_context context,
+ krb5_keytab keytab,
+ krb5_kvno kvno,
+ const char *princ_s,
+ const char *salt_principal,
+ krb5_enctype enctype,
+ krb5_data *password,
+ bool no_salt);
+
+krb5_error_code smb_krb5_get_credentials(krb5_context context,
+ krb5_ccache ccache,
+ krb5_principal me,
+ krb5_principal server,
+ krb5_principal impersonate_princ,
+ krb5_creds **out_creds);
+krb5_error_code smb_krb5_keyblock_init_contents(krb5_context context,
+ krb5_enctype enctype,
+ const void *data,
+ size_t length,
+ krb5_keyblock *key);
+krb5_error_code smb_krb5_kinit_keyblock_ccache(krb5_context ctx,
+ krb5_ccache cc,
+ krb5_principal principal,
+ krb5_keyblock *keyblock,
+ const char *target_service,
+ krb5_get_init_creds_opt *krb_options,
+ time_t *expire_time,
+ time_t *kdc_time);
+krb5_error_code smb_krb5_kinit_password_ccache(krb5_context ctx,
+ krb5_ccache cc,
+ krb5_principal principal,
+ const char *password,
+ const char *target_service,
+ krb5_get_init_creds_opt *krb_options,
+ time_t *expire_time,
+ time_t *kdc_time);
+krb5_error_code smb_krb5_kinit_s4u2_ccache(krb5_context ctx,
+ krb5_ccache store_cc,
+ krb5_principal init_principal,
+ const char *init_password,
+ krb5_principal impersonate_principal,
+ const char *self_service,
+ const char *target_service,
+ krb5_get_init_creds_opt *krb_options,
+ time_t *expire_time,
+ time_t *kdc_time);
+
+#if defined(HAVE_KRB5_MAKE_PRINCIPAL)
+#define smb_krb5_make_principal krb5_make_principal
+#elif defined(HAVE_KRB5_BUILD_PRINCIPAL_ALLOC_VA)
+krb5_error_code smb_krb5_make_principal(krb5_context context,
+ krb5_principal *principal,
+ const char *realm, ...);
+#else
+#error krb5_make_principal not available
+#endif
+
+#if defined(HAVE_KRB5_CC_GET_LIFETIME)
+#define smb_krb5_cc_get_lifetime krb5_cc_get_lifetime
+#elif defined(HAVE_KRB5_CC_RETRIEVE_CRED)
+krb5_error_code smb_krb5_cc_get_lifetime(krb5_context context,
+ krb5_ccache id,
+ time_t *t);
+#else
+#error krb5_cc_get_lifetime not available
+#endif
+
+#if defined(HAVE_KRB5_FREE_CHECKSUM_CONTENTS)
+#define smb_krb5_free_checksum_contents krb5_free_checksum_contents
+#elif defined (HAVE_FREE_CHECKSUM)
+void smb_krb5_free_checksum_contents(krb5_context ctx, krb5_checksum *cksum);
+#else
+#error krb5_free_checksum_contents/free_Checksum is not available
+#endif
+
+krb5_error_code smb_krb5_make_pac_checksum(TALLOC_CTX *mem_ctx,
+ DATA_BLOB *pac_data,
+ krb5_context context,
+ const krb5_keyblock *keyblock,
+ uint32_t *sig_type,
+ DATA_BLOB *sig_blob);
+
+char *smb_krb5_principal_get_realm(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_const_principal principal);
+
+void smb_krb5_principal_set_type(krb5_context context,
+ krb5_principal principal,
+ int type);
+
+int smb_krb5_principal_is_tgs(krb5_context context,
+ krb5_const_principal principal);
+
+krb5_error_code smb_krb5_principal_set_realm(krb5_context context,
+ krb5_principal principal,
+ const char *realm);
+
+char *smb_krb5_get_realm_from_hostname(TALLOC_CTX *mem_ctx,
+ const char *hostname,
+ const char *client_realm);
+
+char *smb_get_krb5_error_message(krb5_context context,
+ krb5_error_code code,
+ TALLOC_CTX *mem_ctx);
+
+#if defined(HAVE_KRB5_KT_COMPARE)
+#define smb_krb5_kt_compare krb5_kt_compare
+#else
+krb5_boolean smb_krb5_kt_compare(krb5_context context,
+ krb5_keytab_entry *entry,
+ krb5_const_principal principal,
+ krb5_kvno vno,
+ krb5_enctype enctype);
+#endif
+
+const krb5_enctype *samba_all_enctypes(void);
+
+uint32_t kerberos_enctype_to_bitmap(krb5_enctype enc_type_enum);
+krb5_enctype ms_suptype_to_ietf_enctype(uint32_t enctype_bitmap);
+krb5_error_code ms_suptypes_to_ietf_enctypes(TALLOC_CTX *mem_ctx,
+ uint32_t enctype_bitmap,
+ krb5_enctype **enctypes);
+int smb_krb5_get_pw_salt(krb5_context context,
+ krb5_const_principal host_princ,
+ krb5_data *psalt);
+int smb_krb5_salt_principal(krb5_context krb5_ctx,
+ const char *realm,
+ const char *sAMAccountName,
+ const char *userPrincipalName,
+ uint32_t uac_flags,
+ krb5_principal *salt_princ);
+
+int smb_krb5_salt_principal_str(const char *realm,
+ const char *sAMAccountName,
+ const char *userPrincipalName,
+ uint32_t uac_flags,
+ TALLOC_CTX *mem_ctx,
+ char **_salt_principal);
+int smb_krb5_salt_principal2data(krb5_context context,
+ const char *salt_principal,
+ TALLOC_CTX *mem_ctx,
+ char **_salt_data);
+
+int smb_krb5_create_key_from_string(krb5_context context,
+ krb5_const_principal host_princ,
+ const krb5_data *salt,
+ const krb5_data *password,
+ krb5_enctype enctype,
+ krb5_keyblock *key);
+
+#ifndef krb5_princ_size
+#if defined(HAVE_KRB5_PRINCIPAL_GET_NUM_COMP)
+#define krb5_princ_size krb5_principal_get_num_comp
+#else
+#error krb5_princ_size unavailable
+#endif
+#endif
+
+krb5_error_code smb_krb5_principal_get_comp_string(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_const_principal principal,
+ unsigned int component,
+ char **out);
+
+krb5_error_code smb_krb5_copy_data_contents(krb5_data *p,
+ const void *data,
+ size_t len);
+
+krb5_data smb_krb5_make_data(void *data,
+ size_t len);
+
+krb5_data smb_krb5_data_from_blob(DATA_BLOB blob);
+
+int smb_krb5_principal_get_type(krb5_context context,
+ krb5_const_principal principal);
+
+#if !defined(HAVE_KRB5_WARNX)
+krb5_error_code krb5_warnx(krb5_context context, const char *fmt, ...)
+ PRINTF_ATTRIBUTE(2, 0);
+#endif
+
+krb5_error_code smb_krb5_cc_copy_creds(krb5_context context,
+ krb5_ccache incc, krb5_ccache outcc);
+
+#endif /* HAVE_KRB5 */
+
+int ads_krb5_cli_get_ticket(TALLOC_CTX *mem_ctx,
+ const char *principal,
+ time_t time_offset,
+ DATA_BLOB *ticket,
+ DATA_BLOB *session_key_krb5,
+ uint32_t extra_ap_opts, const char *ccname,
+ time_t *tgs_expire,
+ const char *impersonate_princ_s);
+
+NTSTATUS krb5_to_nt_status(krb5_error_code kerberos_error);
+krb5_error_code nt_status_to_krb5(NTSTATUS nt_status);
+
+#endif /* _KRB5_SAMBA_H */
diff --git a/lib/krb5_wrap/wscript_build b/lib/krb5_wrap/wscript_build
new file mode 100644
index 0000000..dd9fc08
--- /dev/null
+++ b/lib/krb5_wrap/wscript_build
@@ -0,0 +1,23 @@
+#!/usr/bin/env python
+
+add_deps = ''
+if bld.CONFIG_SET('SAMBA4_USES_HEIMDAL'):
+ add_deps = ' asn1'
+
+bld.SAMBA_LIBRARY('krb5samba',
+ source='''
+ krb5_samba.c
+ gss_samba.c
+ keytab_util.c
+ enctype_convert.c
+ krb5_errs.c
+ ''',
+ deps='''
+ samba-util
+ talloc
+ krb5
+ com_err
+ gssapi
+ ''' + add_deps,
+ private_library=True
+ )
diff --git a/lib/krb5_wrap/wscript_configure b/lib/krb5_wrap/wscript_configure
new file mode 100644
index 0000000..b595eef
--- /dev/null
+++ b/lib/krb5_wrap/wscript_configure
@@ -0,0 +1,18 @@
+#!/usr/bin/env python
+
+# Check whether we have the krb5_const_pac type, if we aren't sure already.
+if conf.CONFIG_SET('HAVE_KRB5_CONST_PAC') or (
+ conf.CHECK_TYPE('krb5_const_pac',
+ headers='krb5.h',
+ lib='krb5')):
+ # If the type is available, check whether krb5_pac_get_buffer() accepts it
+ # as its second parameter, or whether it takes krb5_pac instead.
+ conf.CHECK_C_PROTOTYPE('krb5_pac_get_buffer',
+ 'krb5_error_code krb5_pac_get_buffer('
+ ' krb5_context context,'
+ ' krb5_const_pac p,'
+ ' uint32_t type,'
+ ' krb5_data *data)',
+ define='KRB5_CONST_PAC_GET_BUFFER',
+ headers='krb5.h',
+ lib='krb5')