Unix SMB/CIFS implementation.
simple kerberos5 routines for active directory
Copyright (C) Andrew Tridgell 2001
- Copyright (C) Luke Howard 2002
+ Copyright (C) Luke Howard 2002-2003
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
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.
{
pkaddr->addrtype = ADDRTYPE_INET;
pkaddr->length = sizeof(((struct sockaddr_in *)paddr)->sin_addr);
- pkaddr->contents = (char *)&(((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;
+ }
+ return krb5_string_to_key_salt(context, enctype, password->data,
+ salt, key);
}
#else
- __ERROR__XX__UNKNOWN_ADDRTYPE
+#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
+
+ void get_auth_data_from_tkt(DATA_BLOB *auth_data, krb5_ticket *tkt)
+{
+#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)
+ *auth_data = data_blob(tkt->enc_part2->authorization_data[0]->contents,
+ tkt->enc_part2->authorization_data[0]->length);
+#else
+ if (tkt->ticket.authorization_data && tkt->ticket.authorization_data->len)
+ *auth_data = data_blob(tkt->ticket.authorization_data->val->ad_data.data,
+ tkt->ticket.authorization_data->val->ad_data.length);
+#endif
+}
+
+ 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 krb5_mk_req2(krb5_context context,
- krb5_auth_context *auth_context,
- const krb5_flags ap_req_options,
- const char *principal,
- krb5_ccache ccache,
- krb5_data *outbuf)
+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;
retval = krb5_parse_name(context, principal, &server);
if (retval) {
- DEBUG(1,("Failed to parse principal %s\n", principal));
+ DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
return retval;
}
/* obtain ticket & session key */
- memset((char *)&creds, 0, sizeof(creds));
+ ZERO_STRUCT(creds);
if ((retval = krb5_copy_principal(context, server, &creds.server))) {
DEBUG(1,("krb5_copy_principal failed (%s)\n",
error_message(retval)));
}
if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
- DEBUG(1,("krb5_cc_get_principal failed (%s)\n",
+ /* 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;
}
- if ((retval = krb5_get_credentials(context, 0,
- ccache, &creds, &credsp))) {
- DEBUG(1,("krb5_get_credentials failed for %s (%s)\n",
- principal, error_message(retval)));
- goto cleanup_creds;
- }
+ while(!creds_ready) {
+ 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);
+ }
- /* cope with the ticket being in the future due to clock skew */
- if ((unsigned)credsp->times.starttime > time(NULL)) {
- time_t t = time(NULL);
- int time_offset = (unsigned)credsp->times.starttime - t;
- DEBUG(4,("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;
}
+ 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,("krb5_mk_req_extended failed (%s)\n",
+ DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
error_message(retval)));
}
/*
get a kerberos5 ticket for the given service
*/
-DATA_BLOB krb5_get_ticket(const char *principal, time_t time_offset)
+int cli_krb5_get_ticket(const char *principal, time_t time_offset,
+ DATA_BLOB *ticket, DATA_BLOB *session_key_krb5)
{
krb5_error_code retval;
krb5_data packet;
- krb5_ccache ccdef;
- krb5_context context;
+ krb5_context context = NULL;
+ krb5_ccache ccdef = NULL;
krb5_auth_context auth_context = NULL;
- DATA_BLOB ret;
krb5_enctype enc_types[] = {
#ifdef ENCTYPE_ARCFOUR_HMAC
- ENCTYPE_ARCFOUR_HMAC,
-#endif
- ENCTYPE_DES_CBC_MD5,
- ENCTYPE_NULL};
-
+ ENCTYPE_ARCFOUR_HMAC,
+#endif
+ ENCTYPE_DES_CBC_MD5,
+ ENCTYPE_DES_CBC_CRC,
+ ENCTYPE_NULL};
+
retval = krb5_init_context(&context);
if (retval) {
- DEBUG(1,("krb5_init_context failed (%s)\n",
+ DEBUG(1,("cli_krb5_get_ticket: krb5_init_context failed (%s)\n",
error_message(retval)));
goto failed;
}
}
if ((retval = krb5_cc_default(context, &ccdef))) {
- DEBUG(1,("krb5_cc_default failed (%s)\n",
+ 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,("krb5_set_default_tgs_ktypes failed (%s)\n",
+ DEBUG(1,("cli_krb5_get_ticket: krb5_set_default_tgs_ktypes failed (%s)\n",
error_message(retval)));
goto failed;
}
- if ((retval = krb5_mk_req2(context,
- &auth_context,
- 0,
- principal,
- ccdef, &packet))) {
+ if ((retval = ads_krb5_mk_req(context,
+ &auth_context,
+ AP_OPTS_USE_SUBKEY,
+ principal,
+ ccdef, &packet))) {
goto failed;
}
- ret = data_blob(packet.data, packet.length);
-/* Hmm, heimdal dooesn't have this - what's the correct call? */
-/* krb5_free_data_contents(context, &packet); */
- krb5_free_context(context);
- return ret;
+ 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 ( context ) {
+ if (ccdef)
+ krb5_cc_close(context, ccdef);
+ if (auth_context)
+ krb5_auth_con_free(context, auth_context);
krb5_free_context(context);
+ }
- return data_blob(NULL, 0);
+ 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 )
+{
+ static krb5_data kdata;
+
+ kdata.data = 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
+}
#else /* HAVE_KRB5 */
/* this saves a few linking headaches */
- DATA_BLOB krb5_get_ticket(const char *principal, time_t time_offset)
- {
+int cli_krb5_get_ticket(const char *principal, time_t time_offset,
+ DATA_BLOB *ticket, DATA_BLOB *session_key_krb5)
+{
DEBUG(0,("NO KERBEROS SUPPORT\n"));
- return data_blob(NULL, 0);
- }
+ return 1;
+}
+
#endif
git.samba.org / kamenim / samba-autobuild / .git / blobdiff