diff options
Diffstat (limited to 'source3/libsmb/clikrb5.c')
| -rw-r--r-- | source3/libsmb/clikrb5.c | 2202 |
1 files changed, 0 insertions, 2202 deletions
diff --git a/source3/libsmb/clikrb5.c b/source3/libsmb/clikrb5.c deleted file mode 100644 index dce1df7c9c..0000000000 --- a/source3/libsmb/clikrb5.c +++ /dev/null @@ -1,2202 +0,0 @@ -/* - 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 "smb_krb5.h" -#include "../librpc/gen_ndr/krb5pac.h" -#include "../lib/util/asn1.h" -#include "libsmb/nmblib.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 - -/************************************************************** - Wrappers around kerberos string functions that convert from - utf8 -> unix charset and vica versa. -**************************************************************/ - -/************************************************************** - 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; - - if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) { - return ENOMEM; - } - - ret = krb5_parse_name(context, utf8_name, principal); - TALLOC_FREE(utf8_name); - return ret; -} - -#ifdef HAVE_KRB5_PARSE_NAME_NOREALM -/************************************************************** - krb5_parse_name_norealm that takes a UNIX charset. -**************************************************************/ - -static krb5_error_code smb_krb5_parse_name_norealm_conv(krb5_context context, - const char *name, /* in unix charset */ - krb5_principal *principal) -{ - krb5_error_code ret; - char *utf8_name; - size_t converted_size; - - *principal = NULL; - if (!push_utf8_talloc(talloc_tos(), &utf8_name, name, &converted_size)) { - return ENOMEM; - } - - ret = krb5_parse_name_norealm(context, utf8_name, principal); - TALLOC_FREE(utf8_name); - return ret; -} -#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; -} - -#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_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_USE_ENCTYPE) && defined(HAVE_KRB5_STRING_TO_KEY) && defined(HAVE_KRB5_ENCRYPT_BLOCK) -static 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; - 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) -static 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 - - 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) -{ - 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. - */ - if (no_salt) { - KRB5_KEY_DATA(key) = (KRB5_KEY_DATA_CAST *)SMB_MALLOC(password->length); - if (!KRB5_KEY_DATA(key)) { - return ENOMEM; - } - memcpy(KRB5_KEY_DATA(key), password->data, password->length); - KRB5_KEY_LENGTH(key) = password->length; - KRB5_KEY_TYPE(key) = enctype; - return 0; - } - 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 - -#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; -} - - -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; - } - - data = asn1_init(mem_ctx); - if (data == NULL) { - 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, talloc_tos(), &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) { - return true; - } - } - - 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) { - return true; - } - } - - 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_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; - 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; -} - -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; -} - -/* - 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; - uint32_t gss_flags = 0; - - 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_FWD_TGT_CREDS) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE) - 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] */ - CONST_DISCARD(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))); - } - -cleanup_data: - if (in_data.data) { - free( in_data.data ); - in_data.length = 0; - } - - krb5_free_creds(context, credsp); - -cleanup_creds: - krb5_free_cred_contents(context, &creds); - -cleanup_princ: - krb5_free_principal(context, server); - if (impersonate_princ) { - krb5_free_principal(context, impersonate_princ); - } - - return retval; -} - -/* - get a kerberos5 ticket for the given service -*/ -int 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[] = { -#ifdef HAVE_ENCTYPE_AES256_CTS_HMAC_SHA1_96 - ENCTYPE_AES256_CTS_HMAC_SHA1_96, -#endif -#ifdef HAVE_ENCTYPE_AES128_CTS_HMAC_SHA1_96 - ENCTYPE_AES128_CTS_HMAC_SHA1_96, -#endif - 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 = (char *)krb5_principal_get_comp_string(context, principal, i); - kdata.length = strlen((const char *)kdata.data); - return &kdata; -} -#endif - - 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 -} - - void smb_krb5_checksum_from_pac_sig(krb5_checksum *cksum, - struct PAC_SIGNATURE_DATA *sig) -{ -#ifdef HAVE_CHECKSUM_IN_KRB5_CHECKSUM - cksum->cksumtype = (krb5_cksumtype)sig->type; - cksum->checksum.length = sig->signature.length; - cksum->checksum.data = sig->signature.data; -#else - cksum->checksum_type = (krb5_cksumtype)sig->type; - cksum->length = sig->signature.length; - cksum->contents = sig->signature.data; -#endif -} - - krb5_error_code smb_krb5_verify_checksum(krb5_context context, - const 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 -} - -#ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */ -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 -} -#endif /* HAVE_KRB5_DECODE_AP_REQ */ - -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; - krb5_keyblock *keyp; - - /* 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 = smb_krb5_open_keytab(context, NULL, False, &keytab); - if (ret) { - DEBUG(1,("get_key_from_keytab: smb_krb5_open_keytab failed (%s)\n", error_message(ret))); - return ret; - } - - if ( DEBUGLEVEL >= 10 ) { - if (smb_krb5_unparse_name(talloc_tos(), context, server, &name) == 0) { - DEBUG(10,("get_key_from_keytab: will look for kvno %d, enctype %d and name: %s\n", - kvno, enctype, name)); - TALLOC_FREE(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; - } - - keyp = KRB5_KT_KEY(&entry); - - ret = krb5_copy_keyblock(context, keyp, out_key); - 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; -} - -/* Prototypes */ - - krb5_error_code smb_krb5_get_keyinfo_from_ap_req(krb5_context context, - const krb5_data *inbuf, - krb5_kvno *kvno, - krb5_enctype *enctype) -{ -#ifdef HAVE_KRB5_DECODE_AP_REQ /* Heimdal */ - { - krb5_error_code ret; - 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); - - free_AP_REQ(&ap_req); - return 0; - } -#endif - - /* Possibly not an appropriate error code. */ - return KRB5KDC_ERR_BADOPTION; -} - - 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_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; - } - -#ifdef KRB5_TICKET_HAS_KEYINFO - enctype = (*ticket)->enc_part.enctype; - kvno = (*ticket)->enc_part.kvno; -#else - ret = smb_krb5_get_keyinfo_from_ap_req(context, inbuf, &kvno, &enctype); - if (ret) { - return ret; - } -#endif - - 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 (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 smb_krb5_parse_name_norealm_conv(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 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) -{ -#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 -} - - 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, CONST_DISCARD(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; - } - } - -#ifdef HAVE_KRB5_GET_RENEWED_CREDS /* MIT */ - { - ret = krb5_get_renewed_creds(context, &creds, client, ccache, CONST_DISCARD(char *, service_string)); - if (ret) { - DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret))); - goto done; - } - } -#elif defined(HAVE_KRB5_GET_KDC_CRED) /* Heimdal */ - { - krb5_kdc_flags flags; - krb5_realm *client_realm = NULL; - - ret = krb5_copy_principal(context, client, &creds_in.client); - if (ret) { - goto done; - } - - if (service_string) { - ret = smb_krb5_parse_name(context, service_string, &creds_in.server); - if (ret) { - goto done; - } - } else { - /* build tgt service by default */ - client_realm = krb5_princ_realm(context, creds_in.client); - if (!client_realm) { - ret = ENOMEM; - goto done; - } - ret = krb5_make_principal(context, &creds_in.server, *client_realm, KRB5_TGS_NAME, *client_realm, NULL); - if (ret) { - goto done; - } - } - - flags.i = 0; - flags.b.renewable = flags.b.renew = True; - - ret = krb5_get_kdc_cred(context, ccache, flags, NULL, NULL, &creds_in, &creds_out); - if (ret) { - DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret))); - goto done; - } - - creds = *creds_out; - } -#else -#error NO_SUITABLE_KRB5_TICKET_RENEW_FUNCTION_AVAILABLE -#endif - - /* 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; -} - - krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr) -{ - krb5_error_code ret = 0; - nstring buf; -#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; - } - - put_name(buf, global_myname(), ' ', 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) -{ -#ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC - /* Heimdal or modern MIT version */ - return krb5_get_init_creds_opt_alloc(context, opt); -#else - /* Historical MIT version */ - krb5_get_init_creds_opt *my_opt; - - *opt = NULL; - - if ((my_opt = SMB_MALLOC_P(krb5_get_init_creds_opt)) == NULL) { - return ENOMEM; - } - - krb5_get_init_creds_opt_init(my_opt); - - *opt = my_opt; - return 0; -#endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC */ -} - - void smb_krb5_get_init_creds_opt_free(krb5_context context, - krb5_get_init_creds_opt *opt) -{ -#ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_FREE - -#ifdef KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT - /* Modern MIT or Heimdal version */ - krb5_get_init_creds_opt_free(context, opt); -#else - /* Heimdal version */ - krb5_get_init_creds_opt_free(opt); -#endif /* KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT */ - -#else /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */ - /* Historical MIT version */ - SAFE_FREE(opt); - opt = NULL; -#endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_FREE */ -} - - krb5_enctype smb_get_enctype_from_kt_entry(krb5_keytab_entry *kt_entry) -{ - return KRB5_KEY_TYPE(KRB5_KT_KEY(kt_entry)); -} - - -/* 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 -} - - krb5_error_code smb_krb5_mk_error(krb5_context context, - krb5_error_code error_code, - const krb5_principal server, - krb5_data *reply) -{ -#ifdef HAVE_SHORT_KRB5_MK_ERROR_INTERFACE /* MIT */ - /* - * The MIT interface is *terrible*. - * We have to construct this ourselves... - */ - krb5_error e; - - memset(&e, 0, sizeof(e)); - krb5_us_timeofday(context, &e.stime, &e.susec); - e.server = server; -#if defined(krb5_err_base) - e.error = error_code - krb5_err_base; -#elif defined(ERROR_TABLE_BASE_krb5) - e.error = error_code - ERROR_TABLE_BASE_krb5; -#else - e.error = error_code; /* Almost certainly wrong, but what can we do... ? */ -#endif - - return krb5_mk_error(context, &e, reply); -#else /* Heimdal. */ - return krb5_mk_error(context, - error_code, - NULL, - NULL, /* e_data */ - NULL, - server, - NULL, - NULL, - reply); -#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 krb5_principal_get_realm(context, principal); -#elif defined(krb5_princ_realm) /* MIT */ - krb5_data *realm; - realm = krb5_princ_realm(context, principal); - return (char *)realm->data; -#else - return NULL; -#endif -} - -#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; -} - -bool unwrap_pac(TALLOC_CTX *mem_ctx, DATA_BLOB *auth_data, DATA_BLOB *unwrapped_pac_data) -{ - DEBUG(0,("NO KERBEROS SUPPORT\n")); - return false; -} - -#endif /* HAVE_KRB5 */ |