diff options
Diffstat (limited to 'source4/libcli/raw/clikrb5.c')
| -rw-r--r-- | source4/libcli/raw/clikrb5.c | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/source4/libcli/raw/clikrb5.c b/source4/libcli/raw/clikrb5.c new file mode 100644 index 0000000000..5edc56daa9 --- /dev/null +++ b/source4/libcli/raw/clikrb5.c @@ -0,0 +1,399 @@ +/* + Unix SMB/CIFS implementation. + simple kerberos5 routines for active directory + Copyright (C) Andrew Tridgell 2001 + 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 + 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. +*/ + +#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 = (char *)&(((struct sockaddr_in *)paddr)->sin_addr); +} +#else + __ERROR__XX__UNKNOWN_ADDRTYPE +#endif + +#if defined(HAVE_KRB5_PRINCIPAL2SALT) && defined(HAVE_KRB5_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) + int create_kerberos_key_from_string(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); + return krb5_string_to_key(context, &eblock, key, password, &salt); +} +#elif defined(HAVE_KRB5_GET_PW_SALT) && defined(HAVE_KRB5_STRING_TO_KEY_SALT) + int create_kerberos_key_from_string(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_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) +{ + 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) + *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; + + *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 = malloc( sizeof(struct sockaddr) * num_kdcs ); + if (!sa) { + DEBUG(0, ("krb5_locate_kdc: malloc failed\n")); + krb5_krbhst_free(ctx, hnd); + naddrs = 0; + return -1; + } + + memset(*addr_pp, '\0', sizeof(struct sockaddr) * num_kdcs ); + + for (i = 0; i < num_kdcs && (rc = krb5_krbhst_next(ctx, hnd, &hinfo) == 0); i++) { + if (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 + +/* + 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) +{ + krb5_error_code retval; + krb5_principal server; + krb5_creds * credsp; + krb5_creds creds; + krb5_data in_data; + + retval = krb5_parse_name(context, principal, &server); + if (retval) { + DEBUG(1,("Failed to parse principal %s\n", principal)); + return retval; + } + + /* obtain ticket & session key */ + memset((char *)&creds, 0, sizeof(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))) { + DEBUG(1,("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; + } + + /* 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); + } + + 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", + 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 +*/ +DATA_BLOB krb5_get_ticket(const char *principal, time_t time_offset) +{ + krb5_error_code retval; + krb5_data packet; + krb5_ccache ccdef; + krb5_context context; + 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_DES_CBC_CRC, + ENCTYPE_NULL}; + + 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_default(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; + } + + if ((retval = krb5_mk_req2(context, + &auth_context, + 0, + 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; + +failed: + if ( context ) + krb5_free_context(context); + + return data_blob(NULL, 0); +} + + BOOL krb5_get_smb_session_key(krb5_context context, krb5_auth_context auth_context, uint8 session_key[16]) + { +#ifdef ENCTYPE_ARCFOUR_HMAC + krb5_keyblock *skey; +#endif + BOOL ret = False; + + memset(session_key, 0, 16); + +#ifdef ENCTYPE_ARCFOUR_HMAC + if (krb5_auth_con_getremotesubkey(context, auth_context, &skey) == 0 && skey != NULL) { + if (KRB5_KEY_TYPE(skey) == + ENCTYPE_ARCFOUR_HMAC + && KRB5_KEY_LENGTH(skey) == 16) { + memcpy(session_key, KRB5_KEY_DATA(skey), KRB5_KEY_LENGTH(skey)); + ret = True; + } + krb5_free_keyblock(context, skey); + } +#endif /* ENCTYPE_ARCFOUR_HMAC */ + + return ret; + } +#else /* HAVE_KRB5 */ + /* this saves a few linking headaches */ +DATA_BLOB krb5_get_ticket(const char *principal, time_t time_offset) + { + DEBUG(0,("NO KERBEROS SUPPORT\n")); + return data_blob(NULL, 0); + } + +#endif |