--- /dev/null
+/*
+ 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
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#define KRB5_PRIVATE 1 /* this file uses PRIVATE interfaces! */
+#define KRB5_DEPRECATED 1 /* this file uses DEPRECATED interfaces! */
+
+#include "includes.h"
+
+#ifdef HAVE_KRB5
+
+#ifdef HAVE_KRB5_KEYBLOCK_KEYVALUE
+#define KRB5_KEY_TYPE(k) ((k)->keytype)
+#define KRB5_KEY_LENGTH(k) ((k)->keyvalue.length)
+#define KRB5_KEY_DATA(k) ((k)->keyvalue.data)
+#else
+#define KRB5_KEY_TYPE(k) ((k)->enctype)
+#define KRB5_KEY_LENGTH(k) ((k)->length)
+#define KRB5_KEY_DATA(k) ((k)->contents)
+#endif /* HAVE_KRB5_KEYBLOCK_KEYVALUE */
+
+#ifndef HAVE_KRB5_SET_REAL_TIME
+/*
+ * This function is not in the Heimdal mainline.
+ */
+ krb5_error_code krb5_set_real_time(krb5_context context, int32_t seconds, int32_t microseconds)
+{
+ krb5_error_code ret;
+ int32_t sec, usec;
+
+ ret = krb5_us_timeofday(context, &sec, &usec);
+ if (ret)
+ return ret;
+
+ context->kdc_sec_offset = seconds - sec;
+ context->kdc_usec_offset = microseconds - usec;
+
+ return 0;
+}
+#endif
+
+#if defined(HAVE_KRB5_SET_DEFAULT_IN_TKT_ETYPES) && !defined(HAVE_KRB5_SET_DEFAULT_TGS_KTYPES)
+ 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
+
+#if defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS)
+/* HEIMDAL */
+ void setup_kaddr( krb5_address *pkaddr, struct sockaddr *paddr)
+{
+ 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);
+}
+#elif defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS)
+/* MIT */
+ void setup_kaddr( krb5_address *pkaddr, struct sockaddr *paddr)
+{
+ pkaddr->addrtype = ADDRTYPE_INET;
+ pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
+ pkaddr->contents = (krb5_octet *)&(((struct sockaddr_in *)paddr)->sin_addr);
+}
+#else
+#error UNKNOWN_ADDRTYPE
+#endif
+
+#if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK)
+ 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_data salt;
+ krb5_encrypt_block eblock;
+
+ ret = krb5_principal2salt(context, host_princ, &salt);
+ if (ret) {
+ DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
+ return ret;
+ }
+ krb5_use_enctype(context, &eblock, enctype);
+ ret = krb5_string_to_key(context, &eblock, key, password, &salt);
+ SAFE_FREE(salt.data);
+ return ret;
+}
+#elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT)
+ 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, password->data, salt, key);
+ krb5_free_salt(context, salt);
+ return ret;
+}
+#else
+#error UNKNOWN_CREATE_KEY_FUNCTIONS
+#endif
+
+ int create_kerberos_key_from_string(krb5_context context,
+ krb5_principal host_princ,
+ krb5_data *password,
+ krb5_keyblock *key,
+ krb5_enctype enctype)
+{
+ krb5_principal salt_princ = NULL;
+ int ret;
+ /*
+ * Check if we've determined that the KDC is salting keys for this
+ * principal/enctype in a non-obvious way. If it is, try to match
+ * its behavior.
+ */
+ salt_princ = kerberos_fetch_salt_princ_for_host_princ(context, host_princ, enctype);
+ ret = create_kerberos_key_from_string_direct(context, salt_princ ? salt_princ : host_princ, password, key, enctype);
+ if (salt_princ) {
+ krb5_free_principal(context, salt_princ);
+ }
+ return ret;
+}
+
+#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)
+{
+ return krb5_get_default_in_tkt_etypes(context, enctypes);
+}
+#else
+#error UNKNOWN_GET_ENCTYPES_FUNCTIONS
+#endif
+
+ void free_kerberos_etypes(krb5_context context,
+ krb5_enctype *enctypes)
+{
+#if defined(HAVE_KRB5_FREE_KTYPES)
+ krb5_free_ktypes(context, enctypes);
+ return;
+#else
+ SAFE_FREE(enctypes);
+ return;
+#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_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data)
+{
+ DATA_BLOB pac_contents;
+ ASN1_DATA data;
+ int data_type;
+
+ if (!auth_data->length) {
+ return False;
+ }
+
+ asn1_load(&data, *auth_data);
+ asn1_start_tag(&data, ASN1_SEQUENCE(0));
+ asn1_start_tag(&data, ASN1_SEQUENCE(0));
+ asn1_start_tag(&data, ASN1_CONTEXT(0));
+ asn1_read_Integer(&data, &data_type);
+
+ if (data_type != KRB5_AUTHDATA_WIN2K_PAC ) {
+ DEBUG(10,("authorization data is not a Windows PAC (type: %d)\n", data_type));
+ asn1_free(&data);
+ return False;
+ }
+
+ asn1_end_tag(&data);
+ asn1_start_tag(&data, ASN1_CONTEXT(1));
+ asn1_read_OctetString(&data, &pac_contents);
+ asn1_end_tag(&data);
+ asn1_end_tag(&data);
+ asn1_end_tag(&data);
+ asn1_free(&data);
+
+ *unwrapped_pac_data = data_blob_talloc(mem_ctx, pac_contents.data, pac_contents.length);
+
+ data_blob_free(&pac_contents);
+
+ return True;
+}
+
+ BOOL get_auth_data_from_tkt(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, krb5_ticket *tkt)
+{
+ DATA_BLOB auth_data_wrapped;
+ BOOL got_auth_data_pac = False;
+ int i;
+
+#if defined(HAVE_KRB5_TKT_ENC_PART2)
+ if (tkt->enc_part2 && tkt->enc_part2->authorization_data &&
+ tkt->enc_part2->authorization_data[0] &&
+ tkt->enc_part2->authorization_data[0]->length)
+ {
+ for (i = 0; tkt->enc_part2->authorization_data[i] != NULL; i++) {
+
+ if (tkt->enc_part2->authorization_data[i]->ad_type !=
+ KRB5_AUTHDATA_IF_RELEVANT) {
+ DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
+ tkt->enc_part2->authorization_data[i]->ad_type));
+ continue;
+ }
+
+ auth_data_wrapped = data_blob(tkt->enc_part2->authorization_data[i]->contents,
+ tkt->enc_part2->authorization_data[i]->length);
+
+ /* check if it is a PAC */
+ got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
+ data_blob_free(&auth_data_wrapped);
+
+ if (!got_auth_data_pac) {
+ continue;
+ }
+ }
+
+ return got_auth_data_pac;
+ }
+
+#else
+ if (tkt->ticket.authorization_data &&
+ tkt->ticket.authorization_data->len)
+ {
+ for (i = 0; i < tkt->ticket.authorization_data->len; i++) {
+
+ if (tkt->ticket.authorization_data->val[i].ad_type !=
+ KRB5_AUTHDATA_IF_RELEVANT) {
+ DEBUG(10,("get_auth_data_from_tkt: ad_type is %d\n",
+ tkt->ticket.authorization_data->val[i].ad_type));
+ continue;
+ }
+
+ auth_data_wrapped = data_blob(tkt->ticket.authorization_data->val[i].ad_data.data,
+ tkt->ticket.authorization_data->val[i].ad_data.length);
+
+ /* check if it is a PAC */
+ got_auth_data_pac = unwrap_pac(mem_ctx, &auth_data_wrapped, auth_data);
+ data_blob_free(&auth_data_wrapped);
+
+ if (!got_auth_data_pac) {
+ continue;
+ }
+ }
+
+ return got_auth_data_pac;
+ }
+#endif
+ return False;
+}
+
+ krb5_const_principal get_principal_from_tkt(krb5_ticket *tkt)
+{
+#if defined(HAVE_KRB5_TKT_ENC_PART2)
+ return tkt->enc_part2->client;
+#else
+ return tkt->client;
+#endif
+}
+
+#if !defined(HAVE_KRB5_LOCATE_KDC)
+ krb5_error_code krb5_locate_kdc(krb5_context ctx, const krb5_data *realm, struct sockaddr **addr_pp, int *naddrs, int get_masters)
+{
+ krb5_krbhst_handle hnd;
+ krb5_krbhst_info *hinfo;
+ krb5_error_code rc;
+ int num_kdcs, i;
+ struct sockaddr *sa;
+ struct addrinfo *ai;
+
+ *addr_pp = NULL;
+ *naddrs = 0;
+
+ rc = krb5_krbhst_init(ctx, realm->data, KRB5_KRBHST_KDC, &hnd);
+ if (rc) {
+ DEBUG(0, ("krb5_locate_kdc: krb5_krbhst_init failed (%s)\n", error_message(rc)));
+ return rc;
+ }
+
+ for ( num_kdcs = 0; (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); num_kdcs++)
+ ;
+
+ krb5_krbhst_reset(ctx, hnd);
+
+ if (!num_kdcs) {
+ DEBUG(0, ("krb5_locate_kdc: zero kdcs found !\n"));
+ krb5_krbhst_free(ctx, hnd);
+ return -1;
+ }
+
+ sa = SMB_MALLOC_ARRAY( struct sockaddr, num_kdcs );
+ if (!sa) {
+ DEBUG(0, ("krb5_locate_kdc: malloc failed\n"));
+ krb5_krbhst_free(ctx, hnd);
+ naddrs = 0;
+ return -1;
+ }
+
+ memset(sa, '\0', sizeof(struct sockaddr) * num_kdcs );
+
+ for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) {
+
+#if defined(HAVE_KRB5_KRBHST_GET_ADDRINFO)
+ rc = krb5_krbhst_get_addrinfo(ctx, hinfo, &ai);
+ if (rc) {
+ DEBUG(0,("krb5_krbhst_get_addrinfo failed: %s\n", error_message(rc)));
+ continue;
+ }
+#endif
+ if (hinfo->ai && hinfo->ai->ai_family == AF_INET)
+ memcpy(&sa[i], hinfo->ai->ai_addr, sizeof(struct sockaddr));
+ }
+
+ krb5_krbhst_free(ctx, hnd);
+
+ *naddrs = num_kdcs;
+ *addr_pp = sa;
+ return 0;
+}
+#endif
+
+#if !defined(HAVE_KRB5_FREE_UNPARSED_NAME)
+ void krb5_free_unparsed_name(krb5_context context, char *val)
+{
+ SAFE_FREE(val);
+}
+#endif
+
+ 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);
+ }
+#else
+ SAFE_FREE(pdata->data);
+#endif
+}
+
+ void kerberos_set_creds_enctype(krb5_creds *pcreds, int enctype)
+{
+#if defined(HAVE_KRB5_KEYBLOCK_IN_CREDS)
+ KRB5_KEY_TYPE((&pcreds->keyblock)) = enctype;
+#elif defined(HAVE_KRB5_SESSION_IN_CREDS)
+ KRB5_KEY_TYPE((&pcreds->session)) = enctype;
+#else
+#error UNKNOWN_KEYBLOCK_MEMBER_IN_KRB5_CREDS_STRUCT
+#endif
+}
+
+ BOOL kerberos_compatible_enctypes(krb5_context context,
+ krb5_enctype enctype1,
+ krb5_enctype enctype2)
+{
+#if defined(HAVE_KRB5_C_ENCTYPE_COMPARE)
+ krb5_boolean similar = 0;
+
+ krb5_c_enctype_compare(context, enctype1, enctype2, &similar);
+ return similar ? True : False;
+#elif defined(HAVE_KRB5_ENCTYPES_COMPATIBLE_KEYS)
+ return krb5_enctypes_compatible_keys(context, enctype1, enctype2) ? True : False;
+#endif
+}
+
+static BOOL ads_cleanup_expired_creds(krb5_context context,
+ krb5_ccache ccache,
+ krb5_creds *credsp)
+{
+ krb5_error_code retval;
+
+ DEBUG(3, ("Ticket in ccache[%s] expiration %s\n",
+ krb5_cc_default_name(context),
+ http_timestring(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 (StrCaseCmp(krb5_cc_get_type(context, ccache), "FILE") == 0) {
+ DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a FILE ccache\n"));
+ 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;
+}
+
+/*
+ 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)
+{
+ krb5_error_code retval;
+ krb5_principal server;
+ krb5_creds * credsp;
+ krb5_creds creds;
+ krb5_data in_data;
+ BOOL creds_ready = False;
+ int i = 0, maxtries = 3;
+
+ retval = krb5_parse_name(context, principal, &server);
+ if (retval) {
+ DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
+ return retval;
+ }
+
+ /* obtain ticket & session key */
+ ZERO_STRUCT(creds);
+ if ((retval = krb5_copy_principal(context, server, &creds.server))) {
+ DEBUG(1,("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 = krb5_get_credentials(context, 0, ccache,
+ &creds, &credsp))) {
+ DEBUG(1,("ads_krb5_mk_req: 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) is valid until: (%s - %u)\n",
+ principal, krb5_cc_default_name(context),
+ http_timestring((unsigned)credsp->times.endtime),
+ (unsigned)credsp->times.endtime));
+
+ in_data.length = 0;
+ 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)));
+ }
+
+ krb5_free_creds(context, credsp);
+
+cleanup_creds:
+ krb5_free_cred_contents(context, &creds);
+
+cleanup_princ:
+ krb5_free_principal(context, server);
+
+ return retval;
+}
+
+/*
+ get a kerberos5 ticket for the given service
+*/
+int cli_krb5_get_ticket(const char *principal, time_t time_offset,
+ DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts)
+{
+ 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[] = {
+#ifdef ENCTYPE_ARCFOUR_HMAC
+ ENCTYPE_ARCFOUR_HMAC,
+#endif
+ ENCTYPE_DES_CBC_MD5,
+ ENCTYPE_DES_CBC_CRC,
+ ENCTYPE_NULL};
+
+ initialize_krb5_error_table();
+ retval = krb5_init_context(&context);
+ if (retval) {
+ DEBUG(1,("cli_krb5_get_ticket: 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_default(context, &ccdef))) {
+ DEBUG(1,("cli_krb5_get_ticket: krb5_cc_default failed (%s)\n",
+ error_message(retval)));
+ goto failed;
+ }
+
+ if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
+ DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
+ error_message(retval)));
+ goto failed;
+ }
+
+ if ((retval = ads_krb5_mk_req(context,
+ &auth_context,
+ AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
+ principal,
+ ccdef, &packet))) {
+ goto failed;
+ }
+
+ get_krb5_smb_session_key(context, auth_context, session_key_krb5, False);
+
+ *ticket = data_blob(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(krb5_context context, krb5_auth_context auth_context, DATA_BLOB *session_key, BOOL remote)
+ {
+ krb5_keyblock *skey;
+ krb5_error_code err;
+ 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 == 0 && skey != NULL) {
+ DEBUG(10, ("Got KRB5 session key of length %d\n", KRB5_KEY_LENGTH(skey)));
+ *session_key = data_blob(KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey));
+ dump_data_pw("KRB5 Session Key:\n", session_key->data, session_key->length);
+
+ ret = True;
+
+ krb5_free_keyblock(context, skey);
+ } else {
+ DEBUG(10, ("KRB5 error getting session key %d\n", err));
+ }
+
+ 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 = (char *)krb5_principal_get_comp_string(context, principal, i);
+ kdata.length = strlen(kdata.data);
+ return &kdata;
+}
+#endif
+
+ krb5_error_code smb_krb5_kt_free_entry(krb5_context context, krb5_keytab_entry *kt_entry)
+{
+#if defined(HAVE_KRB5_KT_FREE_ENTRY)
+ return krb5_kt_free_entry(context, kt_entry);
+#elif defined(HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS)
+ return krb5_free_keytab_entry_contents(context, kt_entry);
+#else
+#error UNKNOWN_KT_FREE_FUNCTION
+#endif
+}
+
+ void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum,
+ PAC_SIGNATURE_DATA *sig)
+{
+#ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM
+ cksum->cksumtype = (krb5_cksumtype)sig->type;
+ cksum->checksum.length = sig->signature.buf_len;
+ cksum->checksum.data = sig->signature.buffer;
+#else
+ cksum->checksum_type = (krb5_cksumtype)sig->type;
+ cksum->length = sig->signature.buf_len;
+ cksum->contents = sig->signature.buffer;
+#endif
+}
+
+ krb5_error_code smb_krb5_verify_checksum(krb5_context context,
+ krb5_keyblock *keyblock,
+ krb5_keyusage usage,
+ krb5_checksum *cksum,
+ uint8 *data,
+ size_t length)
+{
+ krb5_error_code ret;
+
+ /* verify the checksum */
+
+ /* welcome to the wonderful world of samba's kerberos abstraction layer:
+ *
+ * function heimdal 0.6.1rc3 heimdal 0.7 MIT krb 1.4.2
+ * -----------------------------------------------------------------------------
+ * krb5_c_verify_checksum - works works
+ * krb5_verify_checksum works (6 args) works (6 args) broken (7 args)
+ */
+
+#if defined(HAVE_KRB5_C_VERIFY_CHECKSUM)
+ {
+ krb5_boolean checksum_valid = False;
+ krb5_data input;
+
+ input.data = (char *)data;
+ input.length = length;
+
+ ret = krb5_c_verify_checksum(context,
+ keyblock,
+ usage,
+ &input,
+ cksum,
+ &checksum_valid);
+ if (ret) {
+ DEBUG(3,("smb_krb5_verify_checksum: krb5_c_verify_checksum() failed: %s\n",
+ error_message(ret)));
+ return ret;
+ }
+
+ if (!checksum_valid)
+ ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
+ }
+
+#elif KRB5_VERIFY_CHECKSUM_ARGS == 6 && defined(HAVE_KRB5_CRYPTO_INIT) && defined(HAVE_KRB5_CRYPTO) && defined(HAVE_KRB5_CRYPTO_DESTROY)
+
+ /* Warning: MIT's krb5_verify_checksum cannot be used as it will use a key
+ * without enctype and it ignores any key_usage types - Guenther */
+
+ {
+
+ krb5_crypto crypto;
+ ret = krb5_crypto_init(context,
+ keyblock,
+ 0,
+ &crypto);
+ if (ret) {
+ DEBUG(0,("smb_krb5_verify_checksum: krb5_crypto_init() failed: %s\n",
+ error_message(ret)));
+ return ret;
+ }
+
+ ret = krb5_verify_checksum(context,
+ crypto,
+ usage,
+ data,
+ length,
+ cksum);
+
+ krb5_crypto_destroy(context, crypto);
+ }
+
+#else
+#error UNKNOWN_KRB5_VERIFY_CHECKSUM_FUNCTION
+#endif
+
+ return ret;
+}
+
+ time_t get_authtime_from_tkt(krb5_ticket *tkt)
+{
+#if defined(HAVE_KRB5_TKT_ENC_PART2)
+ return tkt->enc_part2->times.authtime;
+#else
+ return tkt->ticket.authtime;
+#endif
+}
+
+static int get_kvno_from_ap_req(krb5_ap_req *ap_req)
+{
+#ifdef HAVE_TICKET_POINTER_IN_KRB5_AP_REQ /* MIT */
+ if (ap_req->ticket->enc_part.kvno)
+ return ap_req->ticket->enc_part.kvno;
+#else /* Heimdal */
+ if (ap_req->ticket.enc_part.kvno)
+ return *ap_req->ticket.enc_part.kvno;
+#endif
+ return 0;
+}
+
+static krb5_enctype get_enctype_from_ap_req(krb5_ap_req *ap_req)
+{
+#ifdef HAVE_ETYPE_IN_ENCRYPTEDDATA /* Heimdal */
+ return ap_req->ticket.enc_part.etype;
+#else /* MIT */
+ return ap_req->ticket->enc_part.enctype;
+#endif
+}
+
+static krb5_error_code
+get_key_from_keytab(krb5_context context,
+ krb5_const_principal server,
+ krb5_enctype enctype,
+ krb5_kvno kvno,
+ krb5_keyblock **out_key)
+{
+ krb5_keytab_entry entry;
+ krb5_error_code ret;
+ krb5_keytab keytab;
+ char *name = NULL;
+
+ /* We have to open a new keytab handle here, as MIT does
+ an implicit open/getnext/close on krb5_kt_get_entry. We
+ may be in the middle of a keytab enumeration when this is
+ called. JRA. */
+
+ ret = krb5_kt_default(context, &keytab);
+ if (ret) {
+ DEBUG(0,("get_key_from_keytab: failed to open keytab: %s\n", error_message(ret)));
+ return ret;
+ }
+
+ if ( DEBUGLEVEL >= 10 ) {
+ krb5_unparse_name(context, server, &name);
+ DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n",
+ kvno, enctype, name));
+ krb5_free_unparsed_name(context, name);
+ }
+
+ ret = krb5_kt_get_entry(context,
+ keytab,
+ server,
+ kvno,
+ enctype,
+ &entry);
+
+ if (ret) {
+ DEBUG(0,("get_key_from_keytab: failed to retrieve key: %s\n", error_message(ret)));
+ goto out;
+ }
+
+#ifdef HAVE_KRB5_KEYTAB_ENTRY_KEYBLOCK /* Heimdal */
+ ret = krb5_copy_keyblock(context, &entry.keyblock, out_key);
+#elif defined(HAVE_KRB5_KEYTAB_ENTRY_KEY) /* MIT */
+ ret = krb5_copy_keyblock(context, &entry.key, out_key);
+#else
+#error UNKNOWN_KRB5_KEYTAB_ENTRY_FORMAT
+#endif
+
+ if (ret) {
+ DEBUG(0,("get_key_from_keytab: failed to copy key: %s\n", error_message(ret)));
+ goto out;
+ }
+
+ smb_krb5_kt_free_entry(context, &entry);
+
+out:
+ krb5_kt_close(context, keytab);
+ return ret;
+}
+
+ void smb_krb5_free_ap_req(krb5_context context,
+ krb5_ap_req *ap_req)
+{
+#ifdef HAVE_KRB5_FREE_AP_REQ /* MIT */
+ krb5_free_ap_req(context, ap_req);
+#elif defined(HAVE_FREE_AP_REQ) /* Heimdal */
+ free_AP_REQ(ap_req);
+#else
+#error UNKNOWN_KRB5_AP_REQ_FREE_FUNCTION
+#endif
+}
+
+/* Prototypes */
+#if defined(HAVE_DECODE_KRB5_AP_REQ) /* MIT */
+krb5_error_code decode_krb5_ap_req(const krb5_data *code, krb5_ap_req **rep);
+#endif
+
+ krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context,
+ const krb5_data *inbuf,
+ krb5_kvno *kvno,
+ krb5_enctype *enctype)
+{
+ krb5_error_code ret;
+#ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */
+ {
+ krb5_ap_req ap_req;
+
+ ret = krb5_decode_ap_req(context, inbuf, &ap_req);
+ if (ret)
+ return ret;
+
+ *kvno = get_kvno_from_ap_req(&ap_req);
+ *enctype = get_enctype_from_ap_req(&ap_req);
+
+ smb_krb5_free_ap_req(context, &ap_req);
+ }
+#elif defined(HAVE_DECODE_KRB5_AP_REQ) /* MIT */
+ {
+ krb5_ap_req *ap_req = NULL;
+
+ ret = decode_krb5_ap_req(inbuf, &ap_req);
+ if (ret)
+ return ret;
+
+ *kvno = get_kvno_from_ap_req(ap_req);
+ *enctype = get_enctype_from_ap_req(ap_req);
+
+ smb_krb5_free_ap_req(context, ap_req);
+ }
+#else
+#error UNKOWN_KRB5_AP_REQ_DECODING_FUNCTION
+#endif
+ return ret;
+}
+
+ krb5_error_code krb5_rd_req_return_keyblock_from_keytab(krb5_context context,
+ krb5_auth_context *auth_context,
+ const krb5_data *inbuf,
+ krb5_const_principal server,
+ krb5_keytab keytab,
+ krb5_flags *ap_req_options,
+ krb5_ticket **ticket,
+ krb5_keyblock **keyblock)
+{
+ krb5_error_code ret;
+ krb5_ap_req *ap_req = NULL;
+ krb5_kvno kvno;
+ krb5_enctype enctype;
+ krb5_keyblock *local_keyblock;
+
+ ret = krb5_rd_req(context,
+ auth_context,
+ inbuf,
+ server,
+ keytab,
+ ap_req_options,
+ ticket);
+ if (ret) {
+ return ret;
+ }
+
+ ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype);
+ if (ret) {
+ return ret;
+ }
+
+ ret = get_key_from_keytab(context,
+ server,
+ enctype,
+ kvno,
+ &local_keyblock);
+ if (ret) {
+ DEBUG(0,("krb5_rd_req_return_keyblock_from_keytab: failed to call get_key_from_keytab\n"));
+ goto out;
+ }
+
+out:
+ if (ap_req) {
+ smb_krb5_free_ap_req(context, ap_req);
+ }
+
+ if (ret && local_keyblock != NULL) {
+ krb5_free_keyblock(context, local_keyblock);
+ } else {
+ *keyblock = local_keyblock;
+ }
+
+ return ret;
+}
+
+ krb5_error_code smb_krb5_parse_name_norealm(krb5_context context,
+ const char *name,
+ krb5_principal *principal)
+{
+#ifdef HAVE_KRB5_PARSE_NAME_NOREALM
+ return krb5_parse_name_norealm(context, name, principal);
+#endif
+
+ /* 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 krb5_parse_name(context, name, principal);
+}
+
+ BOOL smb_krb5_principal_compare_any_realm(krb5_context context,
+ krb5_const_principal princ1,
+ krb5_const_principal princ2)
+{
+#ifdef HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM
+
+ return krb5_principal_compare_any_realm(context, princ1, princ2);
+
+/* krb5_princ_size is a macro in MIT */
+#elif defined(HAVE_KRB5_PRINC_SIZE) || defined(krb5_princ_size)
+
+ int i, len1, len2;
+ const krb5_data *p1, *p2;
+
+ len1 = krb5_princ_size(context, princ1);
+ len2 = krb5_princ_size(context, princ2);
+
+ if (len1 != len2)
+ return False;
+
+ for (i = 0; i < len1; i++) {
+
+ p1 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ1), i);
+ p2 = krb5_princ_component(context, CONST_DISCARD(krb5_principal, princ2), i);
+
+ if (p1->length != p2->length || memcmp(p1->data, p2->data, p1->length))
+ return False;
+ }
+
+ return True;
+#else
+#error NO_SUITABLE_PRINCIPAL_COMPARE_FUNCTION
+#endif
+}
+
+#else /* HAVE_KRB5 */
+ /* this saves a few linking headaches */
+ int cli_krb5_get_ticket(const char *principal, time_t time_offset,
+ DATA_BLOB *ticket, DATA_BLOB *session_key_krb5, uint32 extra_ap_opts)
+{
+ DEBUG(0,("NO KERBEROS SUPPORT\n"));
+ return 1;
+}
+
+#endif
projects / samba / blobdiff