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authorSimo Sorce <idra@samba.org>2012-04-21 17:26:18 -0400
committerSimo Sorce <idra@samba.org>2012-04-23 19:20:38 -0400
commit08c733d75fd83fd5e32ced9712d41dd595e0f182 (patch)
treea49d6ebbf1d6c498294862f268d6890a1e6a507f /lib
parentf7070c90b94954835478a09e89a85c03f0f85500 (diff)
downloadsamba-08c733d75fd83fd5e32ced9712d41dd595e0f182.tar.gz
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Make krb5 wrapper library common so they can be used all over
Diffstat (limited to 'lib')
-rw-r--r--lib/krb5_wrap/krb5_samba.c1754
-rw-r--r--lib/krb5_wrap/krb5_samba.h215
-rwxr-xr-xlib/krb5_wrap/wscript_build7
3 files changed, 1976 insertions, 0 deletions
diff --git a/lib/krb5_wrap/krb5_samba.c b/lib/krb5_wrap/krb5_samba.c
new file mode 100644
index 0000000000..4e555b2853
--- /dev/null
+++ b/lib/krb5_wrap/krb5_samba.c
@@ -0,0 +1,1754 @@
+/*
+ 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 "krb5_samba.h"
+#include "librpc/gen_ndr/krb5pac.h"
+#include "lib/util/asn1.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. */
+
+/* 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
+
+#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_ADDR_TYPE_IN_KRB5_ADDRESS)
+/* HEIMDAL */
+ bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
+{
+ memset(pkaddr, '\0', sizeof(krb5_address));
+#if defined(HAVE_IPV6) && defined(KRB5_ADDRESS_INET6)
+ 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;
+ }
+ return false;
+}
+#elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
+/* MIT */
+bool setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr)
+{
+ memset(pkaddr, '\0', sizeof(krb5_address));
+#if defined(HAVE_IPV6) && defined(ADDRTYPE_INET6)
+ 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;
+ }
+ return false;
+}
+#else
+#error UNKNOWN_ADDRTYPE
+#endif
+
+#if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_C_STRING_TO_KEY)
+/* MIT */
+int create_kerberos_key_from_string_direct(krb5_context context,
+ krb5_principal host_princ,
+ krb5_data *password,
+ krb5_keyblock *key,
+ krb5_enctype enctype)
+{
+ int ret = 0;
+ krb5_data salt;
+
+ ret = krb5_principal2salt(context, host_princ, &salt);
+ if (ret) {
+ DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
+ return ret;
+ }
+ ret = krb5_c_string_to_key(context, enctype, password, &salt, key);
+ SAFE_FREE(salt.data);
+
+ return ret;
+}
+#elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
+/* Heimdal */
+int create_kerberos_key_from_string_direct(krb5_context context,
+ krb5_principal host_princ,
+ krb5_data *password,
+ krb5_keyblock *key,
+ krb5_enctype enctype)
+{
+ int ret;
+ krb5_salt salt;
+
+ 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;
+ }
+
+ ret = krb5_string_to_key_salt(context, enctype, (const char *)password->data, salt, key);
+ krb5_free_salt(context, salt);
+
+ return ret;
+}
+#else
+#error UNKNOWN_CREATE_KEY_FUNCTIONS
+#endif
+
+#if defined(HAVE_KRB5_GET_PERMITTED_ENCTYPES)
+ krb5_error_code get_kerberos_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 get_kerberos_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
+
+#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
+
+bool unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
+ DATA_BLOB *edata,
+ DATA_BLOB *edata_out)
+{
+ DATA_BLOB edata_contents;
+ ASN1_DATA *data;
+ int edata_type;
+
+ if (!edata->length) {
+ return false;
+ }
+
+ data = asn1_init(mem_ctx);
+ if (data == NULL) {
+ return false;
+ }
+
+ asn1_load(data, *edata);
+ asn1_start_tag(data, ASN1_SEQUENCE(0));
+ asn1_start_tag(data, ASN1_CONTEXT(1));
+ asn1_read_Integer(data, &edata_type);
+
+ if (edata_type != KRB5_PADATA_PW_SALT) {
+ DEBUG(0,("edata is not of required type %d but of type %d\n",
+ KRB5_PADATA_PW_SALT, edata_type));
+ asn1_free(data);
+ return false;
+ }
+
+ asn1_start_tag(data, ASN1_CONTEXT(2));
+ asn1_read_OctetString(data, talloc_tos(), &edata_contents);
+ asn1_end_tag(data);
+ asn1_end_tag(data);
+ asn1_end_tag(data);
+ asn1_free(data);
+
+ *edata_out = data_blob_talloc(mem_ctx, edata_contents.data, edata_contents.length);
+
+ data_blob_free(&edata_contents);
+
+ return true;
+}
+
+
+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 exectuable
+ */
+ 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 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 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 delgated 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) {
+ 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
+
+/**************************************************************
+ krb5_parse_name that takes a UNIX charset.
+**************************************************************/
+
+krb5_error_code smb_krb5_parse_name(krb5_context context,
+ const char *name, /* in unix charset */
+ 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);
+ TALLOC_FREE(frame);
+ return ret;
+}
+
+#if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
+void krb5_free_unparsed_name(krb5_context context, char *val)
+{
+ SAFE_FREE(val);
+}
+#endif
+
+/**************************************************************
+ krb5_parse_name that returns a UNIX charset name. Must
+ be freed with talloc_free() call.
+**************************************************************/
+
+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;
+}
+
+krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
+ const char *name,
+ krb5_principal *principal)
+{
+ /* we are cheating here because parse_name will in fact set the realm.
+ * We don't care as the only caller of smb_krb5_parse_name_norealm
+ * ignores the realm anyway when calling
+ * smb_krb5_principal_compare_any_realm later - Guenther */
+
+ return smb_krb5_parse_name(context, name, principal);
+}
+
+bool smb_krb5_principal_compare_any_realm(krb5_context context,
+ krb5_const_principal princ1,
+ krb5_const_principal princ2)
+{
+ return krb5_principal_compare_any_realm(context, princ1, princ2);
+}
+
+/*
+ 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;
+
+ ZERO_STRUCT(in_data);
+
+ retval = smb_krb5_parse_name(context, principal, &server);
+ if (retval) {
+ 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;
+ }
+
+ if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
+ /* 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)) {
+
+ if ((retval = smb_krb5_get_credentials(context, ccache,
+ creds.client,
+ creds.server,
+ impersonate_princ,
+ &credsp))) {
+ DEBUG(1,("ads_krb5_mk_req: 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);
+ }
+
+ if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
+ creds_ready = true;
+ }
+
+ i++;
+ }
+
+ DEBUG(10,("ads_krb5_mk_req: 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 = setup_auth_context(context, auth_context);
+ if (retval) {
+ DEBUG(1,("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. */
+
+ DEBUG( 3, ("ads_krb5_mk_req: server marked as OK to delegate to, building forwardable TGT\n") );
+
+ retval = krb5_auth_con_setuseruserkey(context,
+ *auth_context,
+ &credsp->keyblock );
+ if (retval) {
+ DEBUG(1,("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) {
+ DEBUG(1,("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) {
+ DEBUG( 3, ("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 = setup_auth_context(context, auth_context);
+ if (retval) {
+ DEBUG(1,("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 = create_gss_checksum(&in_data, gss_flags);
+ if (retval) {
+ goto cleanup_data;
+ }
+
+ /* We always want GSS-checksum types. */
+ retval = krb5_auth_con_set_req_cksumtype(context, *auth_context, GSSAPI_CHECKSUM );
+ if (retval) {
+ 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) {
+ DEBUG(1,("ads_krb5_mk_req: 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;
+}
+
+void kerberos_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
+}
+
+/*
+ get a kerberos5 ticket for the given service
+*/
+int cli_krb5_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_ARCFOUR_HMAC,
+ ENCTYPE_DES_CBC_MD5,
+ ENCTYPE_DES_CBC_CRC,
+ ENCTYPE_NULL};
+
+ initialize_krb5_error_table();
+ retval = krb5_init_context(&context);
+ if (retval) {
+ DEBUG(1, ("krb5_init_context failed (%s)\n",
+ error_message(retval)));
+ goto failed;
+ }
+
+ if (time_offset != 0) {
+ krb5_set_real_time(context, time(NULL) + time_offset, 0);
+ }
+
+ if ((retval = krb5_cc_resolve(context, ccname ?
+ ccname : krb5_cc_default_name(context), &ccdef))) {
+ DEBUG(1, ("krb5_cc_default failed (%s)\n",
+ error_message(retval)));
+ goto failed;
+ }
+
+ if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
+ DEBUG(1, ("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) {
+ goto failed;
+ }
+
+ get_krb5_smb_session_key(mem_ctx, context, auth_context,
+ session_key_krb5, false);
+
+ *ticket = data_blob_talloc(mem_ctx, packet.data, packet.length);
+
+ kerberos_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;
+}
+
+bool get_krb5_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) {
+ err = krb5_auth_con_getremotesubkey(context,
+ auth_context, &skey);
+ } else {
+ err = krb5_auth_con_getlocalsubkey(context,
+ auth_context, &skey);
+ }
+
+ 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;
+}
+
+
+#if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
+ const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
+
+ const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
+{
+ static krb5_data kdata;
+
+ kdata.data = discard_const_p(char, krb5_principal_get_comp_string(context, principal, i));
+ kdata.length = strlen((const char *)kdata.data);
+ return &kdata;
+}
+#endif
+
+/* Prototypes */
+
+ krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
+ const char *client_string, /* gd@BER.SUSE.DE */
+ const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
+ 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, *creds_out = NULL;
+
+ ZERO_STRUCT(creds);
+ ZERO_STRUCT(creds_in);
+
+ initialize_krb5_error_table();
+ ret = krb5_init_context(&context);
+ if (ret) {
+ goto done;
+ }
+
+ if (!ccache_string) {
+ ccache_string = krb5_cc_default_name(context);
+ }
+
+ if (!ccache_string) {
+ ret = EINVAL;
+ goto done;
+ }
+
+ DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_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) {
+ DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", 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);
+
+ if (creds_out) {
+ krb5_free_creds(context, creds_out);
+ } else {
+ 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;
+}
+
+ 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
+ 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;
+}
+
+ void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
+{
+#ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
+ krb5_free_error_contents(context, krberror);
+#else /* MIT */
+ krb5_free_error(context, krberror);
+#endif
+}
+
+ krb5_error_code handle_krberror_packet(krb5_context context,
+ krb5_data *packet)
+{
+ krb5_error_code ret;
+ bool got_error_code = false;
+
+ DEBUG(10,("handle_krberror_packet: got error packet\n"));
+
+#ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
+ {
+ krb5_error krberror;
+
+ if ((ret = krb5_rd_error(context, packet, &krberror))) {
+ DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
+ error_message(ret)));
+ return ret;
+ }
+
+ if (krberror.e_data == NULL || krberror.e_data->data == NULL) {
+ ret = (krb5_error_code) krberror.error_code;
+ got_error_code = true;
+ }
+
+ smb_krb5_free_error(context, &krberror);
+ }
+#else /* MIT */
+ {
+ krb5_error *krberror;
+
+ if ((ret = krb5_rd_error(context, packet, &krberror))) {
+ DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
+ error_message(ret)));
+ return ret;
+ }
+
+ if (krberror->e_data.data == NULL) {
+#if defined(ERROR_TABLE_BASE_krb5)
+ ret = ERROR_TABLE_BASE_krb5 + (krb5_error_code) krberror->error;
+#else
+ ret = (krb5_error_code)krberror->error;
+#endif
+ got_error_code = true;
+ }
+ smb_krb5_free_error(context, krberror);
+ }
+#endif
+ if (got_error_code) {
+ DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
+ error_message(ret), ret));
+ }
+ return ret;
+}
+
+krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
+ krb5_get_init_creds_opt **opt)
+{
+ /* Heimdal or modern MIT version */
+ return krb5_get_init_creds_opt_alloc(context, opt);
+}
+
+void smb_krb5_get_init_creds_opt_free(krb5_context context,
+ krb5_get_init_creds_opt *opt)
+{
+ /* Modern MIT or Heimdal version */
+ krb5_get_init_creds_opt_free(context, opt);
+}
+
+krb5_enctype smb_get_enctype_from_kt_entry(krb5_keytab_entry *kt_entry)
+{
+ return KRB5_KEY_TYPE(KRB5_KT_KEY(kt_entry));
+}
+
+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
+}
+
+
+/* caller needs to free 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
+}
+
+/**********************************************************************
+ * Open a krb5 keytab with flags, handles readonly or readwrite access and
+ * allows to process non-default keytab names.
+ * @param context krb5_context
+ * @param keytab_name_req string
+ * @param write_access bool if writable keytab is required
+ * @param krb5_keytab pointer to krb5_keytab (close with krb5_kt_close())
+ * @return krb5_error_code
+**********************************************************************/
+
+/* This MAX_NAME_LEN is a constant defined in krb5.h */
+#ifndef MAX_KEYTAB_NAME_LEN
+#define MAX_KEYTAB_NAME_LEN 1100
+#endif
+
+krb5_error_code smb_krb5_open_keytab(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_open_keytab");
+ 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:/", 8) == 0) ||
+ (strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
+ tmp = keytab_name_req;
+ goto resolve;
+ }
+
+ if (keytab_name_req[0] != '/') {
+ ret = KRB5_KT_BADNAME;
+ goto out;
+ }
+
+ 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;
+ }
+
+ DEBUG(10,("smb_krb5_open_keytab: 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:
+ DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
+ ret = krb5_kt_resolve(context, tmp, keytab);
+
+ out:
+ TALLOC_FREE(mem_ctx);
+ return ret;
+}
+
+krb5_error_code smb_krb5_keytab_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;
+}
+
+#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
+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;
+
+#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 */
+
+ 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;
+
+ *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;
+}
+
+/*
+ * smb_krb5_get_creds
+ *
+ * @brief Get krb5 credentials for a server
+ *
+ * @param[in] server_s The string name of the service
+ * @param[in] time_offset The offset to the KDCs time in seconds (optional)
+ * @param[in] cc The krb5 credential cache string name (optional)
+ * @param[in] impersonate_princ_s The string principal name to impersonate (optional)
+ * @param[out] creds_p The returned krb5_creds structure
+ * @return krb5_error_code
+ *
+ */
+krb5_error_code smb_krb5_get_creds(const char *server_s,
+ time_t time_offset,
+ const char *cc,
+ const char *impersonate_princ_s,
+ krb5_creds **creds_p)
+{
+ krb5_error_code ret;
+ krb5_context context = NULL;
+ krb5_principal me = NULL;
+ krb5_principal server = NULL;
+ krb5_principal impersonate_princ = NULL;
+ krb5_creds *creds = NULL;
+ krb5_ccache ccache = NULL;
+
+ *creds_p = NULL;
+
+ initialize_krb5_error_table();
+ ret = krb5_init_context(&context);
+ if (ret) {
+ goto done;
+ }
+
+ if (time_offset != 0) {
+ krb5_set_real_time(context, time(NULL) + time_offset, 0);
+ }
+
+ ret = krb5_cc_resolve(context, cc ? cc :
+ krb5_cc_default_name(context), &ccache);
+ if (ret) {
+ goto done;
+ }
+
+ ret = krb5_cc_get_principal(context, ccache, &me);
+ if (ret) {
+ goto done;
+ }
+
+ ret = smb_krb5_parse_name(context, server_s, &server);
+ if (ret) {
+ goto done;
+ }
+
+ if (impersonate_princ_s) {
+ ret = smb_krb5_parse_name(context, impersonate_princ_s,
+ &impersonate_princ);
+ if (ret) {
+ goto done;
+ }
+ }
+
+ ret = smb_krb5_get_credentials(context, ccache,
+ me, server, impersonate_princ,
+ &creds);
+ if (ret) {
+ goto done;
+ }
+
+ ret = krb5_cc_store_cred(context, ccache, creds);
+ if (ret) {
+ goto done;
+ }
+
+ if (creds_p) {
+ *creds_p = creds;
+ }
+
+ DEBUG(1,("smb_krb5_get_creds: got ticket for %s\n",
+ server_s));
+
+ if (impersonate_princ_s) {
+ char *client = NULL;
+
+ ret = smb_krb5_unparse_name(talloc_tos(), context, creds->client, &client);
+ if (ret) {
+ goto done;
+ }
+ DEBUGADD(1,("smb_krb5_get_creds: using S4U2SELF impersonation as %s\n",
+ client));
+ TALLOC_FREE(client);
+ }
+
+ done:
+ if (!context) {
+ return ret;
+ }
+
+ if (creds && ret) {
+ krb5_free_creds(context, creds);
+ }
+ if (server) {
+ krb5_free_principal(context, server);
+ }
+ if (me) {
+ krb5_free_principal(context, me);
+ }
+ if (impersonate_princ) {
+ krb5_free_principal(context, impersonate_princ);
+ }
+ if (ccache) {
+ krb5_cc_close(context, ccache);
+ }
+ krb5_free_context(context);
+
+ return ret;
+}
+
+/*
+ * smb_krb5_principal_get_realm
+ *
+ * @brief Get realm of a principal
+ *
+ * @param[in] context The krb5_context
+ * @param[in] principal The principal
+ * @return pointer to the realm
+ *
+ */
+
+char *smb_krb5_principal_get_realm(krb5_context context,
+ krb5_principal principal)
+{
+#ifdef HAVE_KRB5_PRINCIPAL_GET_REALM /* Heimdal */
+ return discard_const_p(char, krb5_principal_get_realm(context, principal));
+#elif defined(krb5_princ_realm) /* MIT */
+ krb5_data *realm;
+ realm = krb5_princ_realm(context, principal);
+ return discard_const_p(char, realm->data);
+#else
+ return NULL;
+#endif
+}
+
+/************************************************************************
+ Routine to get the default realm from the kerberos credentials cache.
+ Caller must free if the return value is not NULL.
+************************************************************************/
+
+static char *smb_krb5_get_default_realm_from_ccache(TALLOC_CTX *mem_ctx)
+{
+ char *realm = NULL;
+ krb5_context ctx = NULL;
+ krb5_ccache cc = NULL;
+ krb5_principal princ = NULL;
+
+ initialize_krb5_error_table();
+ if (krb5_init_context(&ctx)) {
+ return NULL;
+ }
+
+ DEBUG(5,("kerberos_get_default_realm_from_ccache: "
+ "Trying to read krb5 cache: %s\n",
+ krb5_cc_default_name(ctx)));
+ if (krb5_cc_default(ctx, &cc)) {
+ DEBUG(0,("kerberos_get_default_realm_from_ccache: "
+ "failed to read default cache\n"));
+ goto out;
+ }
+ if (krb5_cc_get_principal(ctx, cc, &princ)) {
+ DEBUG(0,("kerberos_get_default_realm_from_ccache: "
+ "failed to get default principal\n"));
+ goto out;
+ }
+
+#if defined(HAVE_KRB5_PRINCIPAL_GET_REALM)
+ realm = talloc_strdup(mem_ctx, krb5_principal_get_realm(ctx, princ));
+#elif defined(HAVE_KRB5_PRINC_REALM)
+ {
+ krb5_data *realm_data = krb5_princ_realm(ctx, princ);
+ realm = talloc_strndup(mem_ctx, realm_data->data, realm_data->length);
+ }
+#endif
+
+ out:
+
+ if (ctx) {
+ if (princ) {
+ krb5_free_principal(ctx, princ);
+ }
+ if (cc) {
+ krb5_cc_close(ctx, cc);
+ }
+ krb5_free_context(ctx);
+ }
+
+ return realm;
+}
+
+/************************************************************************
+ Routine to get the realm from a given DNS name.
+************************************************************************/
+
+static char *smb_krb5_get_realm_from_hostname(TALLOC_CTX *mem_ctx,
+ const char *hostname)
+{
+#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;
+
+ initialize_krb5_error_table();
+ if (krb5_init_context(&ctx)) {
+ return NULL;
+ }
+
+ kerr = krb5_get_host_realm(ctx, hostname, &realm_list);
+ 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 && realm_list[0]) {
+ realm = talloc_strdup(mem_ctx, realm_list[0]);
+ }
+
+ out:
+
+ if (ctx) {
+ if (realm_list) {
+ krb5_free_host_realm(ctx, realm_list);
+ realm_list = NULL;
+ }
+ krb5_free_context(ctx);
+ ctx = NULL;
+ }
+ return realm;
+}
+
+char *kerberos_get_principal_from_service_hostname(TALLOC_CTX *mem_ctx,
+ const char *service,
+ const char *remote_name,
+ const char *default_realm)
+{
+ char *realm = NULL;
+ char *host = NULL;
+ char *principal;
+ host = strchr_m(remote_name, '.');
+ if (host) {
+ /* DNS name. */
+ realm = smb_krb5_get_realm_from_hostname(talloc_tos(),
+ remote_name);
+ } else {
+ /* NetBIOS name - use our realm. */
+ realm = smb_krb5_get_default_realm_from_ccache(talloc_tos());
+ }
+
+ if (realm == NULL || *realm == '\0') {
+ realm = talloc_strdup(talloc_tos(), default_realm);
+ if (!realm) {
+ return NULL;
+ }
+ DEBUG(3,("kerberos_get_principal_from_service_hostname: "
+ "cannot get realm from, "
+ "desthost %s or default ccache. Using default "
+ "smb.conf realm %s\n",
+ remote_name,
+ realm));
+ }
+
+ principal = talloc_asprintf(mem_ctx,
+ "%s/%s@%s",
+ service, remote_name,
+ realm);
+ TALLOC_FREE(realm);
+ return principal;
+}
+
+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;
+}
+
+#else /* HAVE_KRB5 */
+ /* this saves a few linking headaches */
+ int cli_krb5_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 0000000000..3800b024ad
--- /dev/null
+++ b/lib/krb5_wrap/krb5_samba.h
@@ -0,0 +1,215 @@
+/*
+ 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
+
+#ifdef HAVE_KRB5
+
+#define KRB5_PRIVATE 1 /* this file uses PRIVATE interfaces! */
+/* this file uses DEPRECATED interfaces! */
+
+#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
+
+/* 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
+
+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 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 */
+
+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 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
+
+/* 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 setup_kaddr( krb5_address *pkaddr, struct sockaddr_storage *paddr);
+int create_kerberos_key_from_string(krb5_context context,
+ krb5_principal host_princ,
+ krb5_data *password,
+ krb5_keyblock *key,
+ krb5_enctype enctype,
+ bool no_salt);
+int create_kerberos_key_from_string_direct(krb5_context context,
+ krb5_principal host_princ,
+ krb5_data *password,
+ krb5_keyblock *key,
+ krb5_enctype enctype);
+
+krb5_error_code get_kerberos_allowed_etypes(krb5_context context, krb5_enctype **enctypes);
+bool get_krb5_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 kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype);
+bool kerberos_compatible_enctypes(krb5_context context, krb5_enctype enctype1, krb5_enctype enctype2);
+void kerberos_free_data_contents(krb5_context context, krb5_data *pdata);
+krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
+ const char *name,
+ krb5_principal *principal);
+bool smb_krb5_principal_compare_any_realm(krb5_context context,
+ krb5_const_principal princ1,
+ krb5_const_principal princ2);
+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 kpasswd_err_to_krb5_err(krb5_error_code res_code);
+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);
+NTSTATUS krb5_to_nt_status(krb5_error_code kerberos_error);
+krb5_error_code nt_status_to_krb5(NTSTATUS nt_status);
+void smb_krb5_free_error(krb5_context context, krb5_error *krberror);
+krb5_error_code handle_krberror_packet(krb5_context context,
+ krb5_data *packet);
+
+void smb_krb5_get_init_creds_opt_free(krb5_context context,
+ krb5_get_init_creds_opt *opt);
+krb5_error_code smb_krb5_get_init_creds_opt_alloc(krb5_context context,
+ krb5_get_init_creds_opt **opt);
+krb5_enctype smb_get_enctype_from_kt_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_open_keytab(krb5_context context,
+ const char *keytab_name,
+ bool write_access,
+ krb5_keytab *keytab);
+krb5_error_code smb_krb5_keytab_name(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_keytab keytab,
+ const char **keytab_name);
+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_get_creds(const char *server_s,
+ time_t time_offset,
+ const char *cc,
+ const char *impersonate_princ_s,
+ krb5_creds **creds_p);
+char *smb_krb5_principal_get_realm(krb5_context context,
+ krb5_principal principal);
+
+char *kerberos_get_principal_from_service_hostname(TALLOC_CTX *mem_ctx,
+ const char *service,
+ const char *remote_name,
+ const char *default_realm);
+
+char *smb_get_krb5_error_message(krb5_context context,
+ krb5_error_code code,
+ TALLOC_CTX *mem_ctx);
+
+int cli_krb5_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);
+
+bool unwrap_edata_ntstatus(TALLOC_CTX *mem_ctx,
+ DATA_BLOB *edata,
+ DATA_BLOB *edata_out);
+
+#endif /* HAVE_KRB5 */
+
+
+#endif /* _KRB5_SAMBA_H */
diff --git a/lib/krb5_wrap/wscript_build b/lib/krb5_wrap/wscript_build
new file mode 100755
index 0000000000..c585819834
--- /dev/null
+++ b/lib/krb5_wrap/wscript_build
@@ -0,0 +1,7 @@
+#!/usr/bin/env python
+
+bld.SAMBA_LIBRARY('krb5samba',
+ source='krb5_samba.c',
+ deps='samba-util asn1util talloc krb5 com_err',
+ private_library=True
+ )