diff options
Diffstat (limited to 'third_party/heimdal/lib/krb5/context.c')
| -rw-r--r-- | third_party/heimdal/lib/krb5/context.c | 1476 |
1 files changed, 1476 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/krb5/context.c b/third_party/heimdal/lib/krb5/context.c new file mode 100644 index 00000000000..51faf8de99d --- /dev/null +++ b/third_party/heimdal/lib/krb5/context.c @@ -0,0 +1,1476 @@ +/* + * Copyright (c) 1997 - 2010 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Portions Copyright (c) 2009 Apple Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#undef KRB5_DEPRECATED_FUNCTION +#define KRB5_DEPRECATED_FUNCTION(x) + +#include "krb5_locl.h" +#include <assert.h> +#include <com_err.h> + +static void _krb5_init_ets(krb5_context); + +#define INIT_FIELD(C, T, E, D, F) \ + (C)->E = krb5_config_get_ ## T ## _default ((C), NULL, (D), \ + "libdefaults", F, NULL) + +#define INIT_FLAG(C, O, V, D, F) \ + do { \ + if (krb5_config_get_bool_default((C), NULL, (D),"libdefaults", F, NULL)) { \ + (C)->O |= V; \ + } \ + } while(0) + +static krb5_error_code +copy_enctypes(krb5_context context, + const krb5_enctype *in, + krb5_enctype **out); + +/* + * Set the list of etypes `ret_etypes' from the configuration variable + * `name' + */ + +static krb5_error_code +set_etypes (krb5_context context, + const char *name, + krb5_enctype **ret_enctypes) +{ + char **etypes_str; + krb5_enctype *etypes = NULL; + + etypes_str = krb5_config_get_strings(context, NULL, "libdefaults", + name, NULL); + if(etypes_str){ + int i, j, k; + for(i = 0; etypes_str[i]; i++); + etypes = malloc((i+1) * sizeof(*etypes)); + if (etypes == NULL) { + krb5_config_free_strings (etypes_str); + return krb5_enomem(context); + } + for(j = 0, k = 0; j < i; j++) { + krb5_enctype e; + if(krb5_string_to_enctype(context, etypes_str[j], &e) != 0) + continue; + if (krb5_enctype_valid(context, e) != 0) + continue; + etypes[k++] = e; + } + etypes[k] = ETYPE_NULL; + krb5_config_free_strings(etypes_str); + } + *ret_enctypes = etypes; + return 0; +} + +/* + * read variables from the configuration file and set in `context' + */ + +static krb5_error_code +init_context_from_config_file(krb5_context context) +{ + krb5_error_code ret; + const char * tmp; + char **s; + krb5_enctype *tmptypes; + + INIT_FIELD(context, time, max_skew, 5 * 60, "clockskew"); + INIT_FIELD(context, time, kdc_timeout, 30, "kdc_timeout"); + INIT_FIELD(context, time, host_timeout, 3, "host_timeout"); + INIT_FIELD(context, int, max_retries, 3, "max_retries"); + + INIT_FIELD(context, string, http_proxy, NULL, "http_proxy"); + + ret = krb5_config_get_bool_default(context, NULL, FALSE, + "libdefaults", + "allow_weak_crypto", NULL); + if (ret) { + krb5_enctype_enable(context, ETYPE_DES_CBC_CRC); + krb5_enctype_enable(context, ETYPE_DES_CBC_MD4); + krb5_enctype_enable(context, ETYPE_DES_CBC_MD5); + krb5_enctype_enable(context, ETYPE_DES_CBC_NONE); + krb5_enctype_enable(context, ETYPE_DES_CFB64_NONE); + krb5_enctype_enable(context, ETYPE_DES_PCBC_NONE); + } + + ret = set_etypes (context, "default_etypes", &tmptypes); + if(ret) + return ret; + free(context->etypes); + context->etypes = tmptypes; + + /* The etypes member may change during the lifetime + * of the context. To be able to reset it to + * config value, we keep another copy. + */ + free(context->cfg_etypes); + context->cfg_etypes = NULL; + if (tmptypes) { + ret = copy_enctypes(context, tmptypes, &context->cfg_etypes); + if (ret) + return ret; + } + + ret = set_etypes (context, "default_etypes_des", &tmptypes); + if(ret) + return ret; + free(context->etypes_des); + context->etypes_des = tmptypes; + + ret = set_etypes (context, "default_as_etypes", &tmptypes); + if(ret) + return ret; + free(context->as_etypes); + context->as_etypes = tmptypes; + + ret = set_etypes (context, "default_tgs_etypes", &tmptypes); + if(ret) + return ret; + free(context->tgs_etypes); + context->tgs_etypes = tmptypes; + + ret = set_etypes (context, "permitted_enctypes", &tmptypes); + if(ret) + return ret; + free(context->permitted_enctypes); + context->permitted_enctypes = tmptypes; + + INIT_FIELD(context, string, default_keytab, + KEYTAB_DEFAULT, "default_keytab_name"); + + INIT_FIELD(context, string, default_keytab_modify, + NULL, "default_keytab_modify_name"); + + INIT_FIELD(context, string, time_fmt, + "%Y-%m-%dT%H:%M:%S", "time_format"); + + INIT_FIELD(context, string, date_fmt, + "%Y-%m-%d", "date_format"); + + INIT_FIELD(context, bool, log_utc, + FALSE, "log_utc"); + + context->no_ticket_store = + getenv("KRB5_NO_TICKET_STORE") != NULL; + + /* init dns-proxy slime */ + tmp = krb5_config_get_string(context, NULL, "libdefaults", + "dns_proxy", NULL); + if(tmp) + roken_gethostby_setup(context->http_proxy, tmp); + krb5_free_host_realm (context, context->default_realms); + context->default_realms = NULL; + + { + krb5_addresses addresses; + char **adr, **a; + + krb5_set_extra_addresses(context, NULL); + adr = krb5_config_get_strings(context, NULL, + "libdefaults", + "extra_addresses", + NULL); + memset(&addresses, 0, sizeof(addresses)); + for(a = adr; a && *a; a++) { + ret = krb5_parse_address(context, *a, &addresses); + if (ret == 0) { + krb5_add_extra_addresses(context, &addresses); + krb5_free_addresses(context, &addresses); + } + } + krb5_config_free_strings(adr); + + krb5_set_ignore_addresses(context, NULL); + adr = krb5_config_get_strings(context, NULL, + "libdefaults", + "ignore_addresses", + NULL); + memset(&addresses, 0, sizeof(addresses)); + for(a = adr; a && *a; a++) { + ret = krb5_parse_address(context, *a, &addresses); + if (ret == 0) { + krb5_add_ignore_addresses(context, &addresses); + krb5_free_addresses(context, &addresses); + } + } + krb5_config_free_strings(adr); + } + + INIT_FIELD(context, bool, scan_interfaces, TRUE, "scan_interfaces"); + INIT_FIELD(context, int, fcache_vno, 0, "fcache_version"); + /* prefer dns_lookup_kdc over srv_lookup. */ + INIT_FIELD(context, bool, srv_lookup, TRUE, "srv_lookup"); + INIT_FIELD(context, bool, srv_lookup, context->srv_lookup, "dns_lookup_kdc"); + INIT_FIELD(context, int, large_msg_size, 1400, "large_message_size"); + INIT_FIELD(context, int, max_msg_size, 1000 * 1024, "maximum_message_size"); + INIT_FLAG(context, flags, KRB5_CTX_F_DNS_CANONICALIZE_HOSTNAME, TRUE, "dns_canonicalize_hostname"); + INIT_FLAG(context, flags, KRB5_CTX_F_CHECK_PAC, TRUE, "check_pac"); + INIT_FLAG(context, flags, KRB5_CTX_F_ENFORCE_OK_AS_DELEGATE, FALSE, "enforce_ok_as_delegate"); + INIT_FLAG(context, flags, KRB5_CTX_F_REPORT_CANONICAL_CLIENT_NAME, FALSE, "report_canonical_client_name"); + + /* report_canonical_client_name implies check_pac */ + if (context->flags & KRB5_CTX_F_REPORT_CANONICAL_CLIENT_NAME) + context->flags |= KRB5_CTX_F_CHECK_PAC; + + if (context->default_cc_name) + free(context->default_cc_name); + context->default_cc_name = NULL; + context->default_cc_name_set = 0; + context->configured_default_cc_name = NULL; + + tmp = secure_getenv("KRB5_TRACE"); + if (tmp) + heim_add_debug_dest(context->hcontext, "libkrb5", tmp); + s = krb5_config_get_strings(context, NULL, "logging", "krb5", NULL); + if (s) { + char **p; + + for (p = s; *p; p++) + heim_add_debug_dest(context->hcontext, "libkrb5", *p); + krb5_config_free_strings(s); + } + + tmp = krb5_config_get_string(context, NULL, "libdefaults", + "check-rd-req-server", NULL); + if (tmp == NULL) + tmp = secure_getenv("KRB5_CHECK_RD_REQ_SERVER"); + if(tmp) { + if (strcasecmp(tmp, "ignore") == 0) + context->flags |= KRB5_CTX_F_RD_REQ_IGNORE; + } + ret = krb5_config_get_bool_default(context, NULL, TRUE, + "libdefaults", + "fcache_strict_checking", NULL); + if (ret) + context->flags |= KRB5_CTX_F_FCACHE_STRICT_CHECKING; + + return 0; +} + +static krb5_error_code +cc_ops_register(krb5_context context) +{ + context->cc_ops = NULL; + context->num_cc_ops = 0; + +#ifndef KCM_IS_API_CACHE + krb5_cc_register(context, &krb5_acc_ops, TRUE); +#endif + krb5_cc_register(context, &krb5_fcc_ops, TRUE); + krb5_cc_register(context, &krb5_dcc_ops, TRUE); + krb5_cc_register(context, &krb5_mcc_ops, TRUE); +#ifdef HAVE_SCC + krb5_cc_register(context, &krb5_scc_ops, TRUE); +#endif +#ifdef HAVE_KCM +#ifdef KCM_IS_API_CACHE + krb5_cc_register(context, &krb5_akcm_ops, TRUE); +#endif + krb5_cc_register(context, &krb5_kcm_ops, TRUE); +#endif +#if defined(HAVE_KEYUTILS_H) + krb5_cc_register(context, &krb5_krcc_ops, TRUE); +#endif + _krb5_load_ccache_plugins(context); + return 0; +} + +static krb5_error_code +cc_ops_copy(krb5_context context, const krb5_context src_context) +{ + const krb5_cc_ops **cc_ops; + + context->cc_ops = NULL; + context->num_cc_ops = 0; + + if (src_context->num_cc_ops == 0) + return 0; + + cc_ops = malloc(sizeof(cc_ops[0]) * src_context->num_cc_ops); + if (cc_ops == NULL) { + krb5_set_error_message(context, KRB5_CC_NOMEM, + N_("malloc: out of memory", "")); + return KRB5_CC_NOMEM; + } + + memcpy(rk_UNCONST(cc_ops), src_context->cc_ops, + sizeof(cc_ops[0]) * src_context->num_cc_ops); + context->cc_ops = cc_ops; + context->num_cc_ops = src_context->num_cc_ops; + + return 0; +} + +static krb5_error_code +kt_ops_register(krb5_context context) +{ + context->num_kt_types = 0; + context->kt_types = NULL; + + krb5_kt_register (context, &krb5_fkt_ops); + krb5_kt_register (context, &krb5_wrfkt_ops); + krb5_kt_register (context, &krb5_javakt_ops); + krb5_kt_register (context, &krb5_mkt_ops); +#ifndef HEIMDAL_SMALLER + krb5_kt_register (context, &krb5_akf_ops); +#endif + krb5_kt_register (context, &krb5_any_ops); + return 0; +} + +static krb5_error_code +kt_ops_copy(krb5_context context, const krb5_context src_context) +{ + context->num_kt_types = 0; + context->kt_types = NULL; + + if (src_context->num_kt_types == 0) + return 0; + + context->kt_types = malloc(sizeof(context->kt_types[0]) * src_context->num_kt_types); + if (context->kt_types == NULL) + return krb5_enomem(context); + + context->num_kt_types = src_context->num_kt_types; + memcpy(context->kt_types, src_context->kt_types, + sizeof(context->kt_types[0]) * src_context->num_kt_types); + + return 0; +} + +static const char *sysplugin_dirs[] = { +#ifdef _WIN32 + "$ORIGIN", +#else + "$ORIGIN/../lib/plugin/krb5", +#endif +#ifdef __APPLE__ + LIBDIR "/plugin/krb5", +#ifdef HEIM_PLUGINS_SEARCH_SYSTEM + "/Library/KerberosPlugins/KerberosFrameworkPlugins", + "/System/Library/KerberosPlugins/KerberosFrameworkPlugins", +#endif +#endif + NULL +}; + +static void +init_context_once(void *ctx) +{ + krb5_context context = ctx; + char **dirs; + +#ifdef _WIN32 + dirs = rk_UNCONST(sysplugin_dirs); +#else + dirs = krb5_config_get_strings(context, NULL, "libdefaults", + "plugin_dir", NULL); + if (dirs == NULL) + dirs = rk_UNCONST(sysplugin_dirs); +#endif + + _krb5_load_plugins(context, "krb5", (const char **)dirs); + + if (dirs != rk_UNCONST(sysplugin_dirs)) + krb5_config_free_strings(dirs); + + bindtextdomain(HEIMDAL_TEXTDOMAIN, HEIMDAL_LOCALEDIR); +} + +/** + * Initializes the context structure and reads the configuration file + * /etc/krb5.conf. The structure should be freed by calling + * krb5_free_context() when it is no longer being used. + * + * @param context pointer to returned context + * + * @return Returns 0 to indicate success. Otherwise an errno code is + * returned. Failure means either that something bad happened during + * initialization (typically ENOMEM) or that Kerberos should not be + * used ENXIO. If the function returns HEIM_ERR_RANDOM_OFFLINE, the + * random source is not available and later Kerberos calls might fail. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_init_context(krb5_context *context) +{ + static heim_base_once_t init_context = HEIM_BASE_ONCE_INIT; + krb5_context p; + krb5_error_code ret; + char **files; + uint8_t rnd; + + *context = NULL; + + /** + * krb5_init_context() will get one random byte to make sure our + * random is alive. Assumption is that once the non blocking + * source allows us to pull bytes, its all seeded and allows us to + * pull more bytes. + * + * Most Kerberos users calls krb5_init_context(), so this is + * useful point where we can do the checking. + */ + ret = krb5_generate_random(&rnd, sizeof(rnd)); + if (ret) + return ret; + + p = calloc(1, sizeof(*p)); + if(!p) + return ENOMEM; + + if ((p->hcontext = heim_context_init()) == NULL) { + ret = ENOMEM; + goto out; + } + + if (!issuid()) + p->flags |= KRB5_CTX_F_HOMEDIR_ACCESS; + + ret = krb5_get_default_config_files(&files); + if(ret) + goto out; + ret = krb5_set_config_files(p, files); + krb5_free_config_files(files); + if(ret) + goto out; + + /* done enough to load plugins */ + heim_base_once_f(&init_context, p, init_context_once); + + /* init error tables */ + _krb5_init_ets(p); + cc_ops_register(p); + kt_ops_register(p); + +#ifdef PKINIT + ret = hx509_context_init(&p->hx509ctx); + if (ret) + goto out; +#endif + if (rk_SOCK_INIT()) + p->flags |= KRB5_CTX_F_SOCKETS_INITIALIZED; + +out: + if (ret) { + krb5_free_context(p); + p = NULL; + } else { + heim_context_set_log_utc(p->hcontext, p->log_utc); + } + *context = p; + return ret; +} + +#ifndef HEIMDAL_SMALLER + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_get_permitted_enctypes(krb5_context context, + krb5_enctype **etypes) +{ + return krb5_get_default_in_tkt_etypes(context, KRB5_PDU_NONE, etypes); +} + +/* + * + */ + +static krb5_error_code +copy_etypes (krb5_context context, + krb5_enctype *enctypes, + krb5_enctype **ret_enctypes) +{ + unsigned int i; + + for (i = 0; enctypes[i]; i++) + ; + i++; + + *ret_enctypes = malloc(sizeof(enctypes[0]) * i); + if (*ret_enctypes == NULL) + return krb5_enomem(context); + memcpy(*ret_enctypes, enctypes, sizeof(enctypes[0]) * i); + return 0; +} + +/** + * Make a copy for the Kerberos 5 context, the new krb5_context shoud + * be freed with krb5_free_context(). + * + * @param context the Kerberos context to copy + * @param out the copy of the Kerberos, set to NULL error. + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_copy_context(krb5_context context, krb5_context *out) +{ + krb5_error_code ret; + krb5_context p; + + *out = NULL; + + p = calloc(1, sizeof(*p)); + if (p == NULL) + return krb5_enomem(context); + + if ((p->hcontext = heim_context_init()) == NULL) { + ret = ENOMEM; + goto out; + } + + heim_context_set_log_utc(p->hcontext, context->log_utc); + + if (context->default_cc_name && + (p->default_cc_name = strdup(context->default_cc_name)) == NULL) { + ret = ENOMEM; + goto out; + } + if (context->default_cc_name_env && + (p->default_cc_name_env = + strdup(context->default_cc_name_env)) == NULL) { + ret = ENOMEM; + goto out; + } + if (context->configured_default_cc_name && + (p->configured_default_cc_name = + strdup(context->configured_default_cc_name)) == NULL) { + ret = ENOMEM; + goto out; + } + + if (context->etypes) { + ret = copy_etypes(context, context->etypes, &p->etypes); + if (ret) + goto out; + } + if (context->cfg_etypes) { + ret = copy_etypes(context, context->cfg_etypes, &p->cfg_etypes); + if (ret) + goto out; + } + if (context->etypes_des) { + ret = copy_etypes(context, context->etypes_des, &p->etypes_des); + if (ret) + goto out; + } + + if (context->default_realms) { + ret = krb5_copy_host_realm(context, + context->default_realms, &p->default_realms); + if (ret) + goto out; + } + + ret = _krb5_config_copy(context, context->cf, &p->cf); + if (ret) + goto out; + + /* XXX should copy */ + _krb5_init_ets(p); + + cc_ops_copy(p, context); + kt_ops_copy(p, context); + + ret = krb5_set_extra_addresses(p, context->extra_addresses); + if (ret) + goto out; + ret = krb5_set_extra_addresses(p, context->ignore_addresses); + if (ret) + goto out; + + ret = _krb5_copy_send_to_kdc_func(p, context); + if (ret) + goto out; + + *out = p; + + return 0; + + out: + krb5_free_context(p); + return ret; +} + +#endif + +/** + * Frees the krb5_context allocated by krb5_init_context(). + * + * @param context context to be freed. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION void KRB5_LIB_CALL +krb5_free_context(krb5_context context) +{ + _krb5_free_name_canon_rules(context, context->name_canon_rules); + if (context->default_cc_name) + free(context->default_cc_name); + if (context->default_cc_name_env) + free(context->default_cc_name_env); + if (context->configured_default_cc_name) + free(context->configured_default_cc_name); + free(context->etypes); + free(context->cfg_etypes); + free(context->etypes_des); + free(context->permitted_enctypes); + free(context->tgs_etypes); + free(context->as_etypes); + krb5_free_host_realm (context, context->default_realms); + krb5_config_file_free (context, context->cf); + free(rk_UNCONST(context->cc_ops)); + free(context->kt_types); + krb5_clear_error_message(context); + krb5_set_extra_addresses(context, NULL); + krb5_set_ignore_addresses(context, NULL); + krb5_set_send_to_kdc_func(context, NULL, NULL); + +#ifdef PKINIT + hx509_context_free(&context->hx509ctx); +#endif + + if (context->flags & KRB5_CTX_F_SOCKETS_INITIALIZED) { + rk_SOCK_EXIT(); + } + + heim_context_free(&context->hcontext); + memset(context, 0, sizeof(*context)); + free(context); +} + +/** + * Reinit the context from a new set of filenames. + * + * @param context context to add configuration too. + * @param filenames array of filenames, end of list is indicated with a NULL filename. + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_set_config_files(krb5_context context, char **filenames) +{ + krb5_error_code ret; + heim_config_binding *tmp = NULL; + + if ((ret = heim_set_config_files(context->hcontext, filenames, + &tmp))) + return ret; + krb5_config_file_free(context, context->cf); + context->cf = (krb5_config_binding *)tmp; + return init_context_from_config_file(context); +} + +#ifndef HEIMDAL_SMALLER +/** + * Reinit the context from configuration file contents in a C string. + * This should only be used in tests. + * + * @param context context to add configuration too. + * @param config configuration. + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_set_config(krb5_context context, const char *config) +{ + krb5_error_code ret; + krb5_config_binding *tmp = NULL; + + if ((ret = krb5_config_parse_string_multi(context, config, &tmp))) + return ret; +#if 0 + /* with this enabled and if there are no config files, Kerberos is + considererd disabled */ + if (tmp == NULL) + return ENXIO; +#endif + + krb5_config_file_free(context, context->cf); + context->cf = tmp; + ret = init_context_from_config_file(context); + return ret; +} +#endif + +/* + * `pq' isn't free, it's up the the caller + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_prepend_config_files(const char *filelist, char **pq, char ***ret_pp) +{ + return heim_prepend_config_files(filelist, pq, ret_pp); +} + +/** + * Prepend the filename to the global configuration list. + * + * @param filelist a filename to add to the default list of filename + * @param pfilenames return array of filenames, should be freed with krb5_free_config_files(). + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_prepend_config_files_default(const char *filelist, char ***pfilenames) +{ + return heim_prepend_config_files_default(filelist, krb5_config_file, + "KRB5_CONFIG", pfilenames); +} + +/** + * Get the global configuration list. + * + * @param pfilenames return array of filenames, should be freed with krb5_free_config_files(). + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_get_default_config_files(char ***pfilenames) +{ + if (pfilenames == NULL) + return EINVAL; + return heim_get_default_config_files(krb5_config_file, "KRB5_CONFIG", + pfilenames); +} + +/** + * Free a list of configuration files. + * + * @param filenames list, terminated with a NULL pointer, to be + * freed. NULL is an valid argument. + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION void KRB5_LIB_CALL +krb5_free_config_files(char **filenames) +{ + heim_free_config_files(filenames); +} + +/** + * Returns the list of Kerberos encryption types sorted in order of + * most preferred to least preferred encryption type. Note that some + * encryption types might be disabled, so you need to check with + * krb5_enctype_valid() before using the encryption type. + * + * @return list of enctypes, terminated with ETYPE_NULL. Its a static + * array completed into the Kerberos library so the content doesn't + * need to be freed. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION const krb5_enctype * KRB5_LIB_CALL +krb5_kerberos_enctypes(krb5_context context) +{ + static const krb5_enctype p[] = { + ETYPE_AES256_CTS_HMAC_SHA1_96, + ETYPE_AES128_CTS_HMAC_SHA1_96, + ETYPE_AES256_CTS_HMAC_SHA384_192, + ETYPE_AES128_CTS_HMAC_SHA256_128, + ETYPE_DES3_CBC_SHA1, + ETYPE_ARCFOUR_HMAC_MD5, + ETYPE_NULL + }; + + static const krb5_enctype weak[] = { + ETYPE_AES256_CTS_HMAC_SHA1_96, + ETYPE_AES128_CTS_HMAC_SHA1_96, + ETYPE_AES256_CTS_HMAC_SHA384_192, + ETYPE_AES128_CTS_HMAC_SHA256_128, + ETYPE_DES3_CBC_SHA1, + ETYPE_DES3_CBC_MD5, + ETYPE_ARCFOUR_HMAC_MD5, + ETYPE_DES_CBC_MD5, + ETYPE_DES_CBC_MD4, + ETYPE_DES_CBC_CRC, + ETYPE_NULL + }; + + /* + * if the list of enctypes enabled by "allow_weak_crypto" + * are valid, then return the former default enctype list + * that contained the weak entries. + */ + if (krb5_enctype_valid(context, ETYPE_DES_CBC_CRC) == 0 && + krb5_enctype_valid(context, ETYPE_DES_CBC_MD4) == 0 && + krb5_enctype_valid(context, ETYPE_DES_CBC_MD5) == 0 && + krb5_enctype_valid(context, ETYPE_DES_CBC_NONE) == 0 && + krb5_enctype_valid(context, ETYPE_DES_CFB64_NONE) == 0 && + krb5_enctype_valid(context, ETYPE_DES_PCBC_NONE) == 0) + return weak; + + return p; +} + +/* + * + */ + +static krb5_error_code +copy_enctypes(krb5_context context, + const krb5_enctype *in, + krb5_enctype **out) +{ + krb5_enctype *p = NULL; + size_t m, n; + + for (n = 0; in[n]; n++) + ; + n++; + ALLOC(p, n); + if(p == NULL) + return krb5_enomem(context); + for (n = 0, m = 0; in[n]; n++) { + if (krb5_enctype_valid(context, in[n]) != 0) + continue; + p[m++] = in[n]; + } + p[m] = KRB5_ENCTYPE_NULL; + if (m == 0) { + free(p); + krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP, + N_("no valid enctype set", "")); + return KRB5_PROG_ETYPE_NOSUPP; + } + *out = p; + return 0; +} + + +/* + * set `etype' to a malloced list of the default enctypes + */ + +static krb5_error_code +default_etypes(krb5_context context, krb5_enctype **etype) +{ + const krb5_enctype *p = krb5_kerberos_enctypes(context); + return copy_enctypes(context, p, etype); +} + +/** + * Set the default encryption types that will be use in communcation + * with the KDC, clients and servers. + * + * @param context Kerberos 5 context. + * @param etypes Encryption types, array terminated with ETYPE_NULL (0). + * A value of NULL resets the encryption types to the defaults set in the + * configuration file. + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_set_default_in_tkt_etypes(krb5_context context, + const krb5_enctype *etypes) +{ + krb5_error_code ret; + krb5_enctype *p = NULL; + + if(!etypes) { + etypes = context->cfg_etypes; + } + + if(etypes) { + ret = copy_enctypes(context, etypes, &p); + if (ret) + return ret; + } + if(context->etypes) + free(context->etypes); + context->etypes = p; + return 0; +} + +/** + * Get the default encryption types that will be use in communcation + * with the KDC, clients and servers. + * + * @param context Kerberos 5 context. + * @param pdu_type request type (AS, TGS or none) + * @param etypes Encryption types, array terminated with + * ETYPE_NULL(0), caller should free array with krb5_xfree(): + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_get_default_in_tkt_etypes(krb5_context context, + krb5_pdu pdu_type, + krb5_enctype **etypes) +{ + krb5_enctype *enctypes = NULL; + krb5_error_code ret; + krb5_enctype *p; + + heim_assert(pdu_type == KRB5_PDU_AS_REQUEST || + pdu_type == KRB5_PDU_TGS_REQUEST || + pdu_type == KRB5_PDU_NONE, "unexpected pdu type"); + + if (pdu_type == KRB5_PDU_AS_REQUEST && context->as_etypes != NULL) + enctypes = context->as_etypes; + else if (pdu_type == KRB5_PDU_TGS_REQUEST && context->tgs_etypes != NULL) + enctypes = context->tgs_etypes; + else if (context->etypes != NULL) + enctypes = context->etypes; + + if (enctypes != NULL) { + ret = copy_enctypes(context, enctypes, &p); + if (ret) + return ret; + } else { + ret = default_etypes(context, &p); + if (ret) + return ret; + } + *etypes = p; + return 0; +} + +/** + * Init the built-in ets in the Kerberos library. + * + * @param context kerberos context to add the ets too + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION void KRB5_LIB_CALL +krb5_init_ets(krb5_context context) +{ +} + +static void +_krb5_init_ets(krb5_context context) +{ + heim_add_et_list(context->hcontext, initialize_krb5_error_table_r); + heim_add_et_list(context->hcontext, initialize_asn1_error_table_r); + heim_add_et_list(context->hcontext, initialize_heim_error_table_r); + + heim_add_et_list(context->hcontext, initialize_k524_error_table_r); + heim_add_et_list(context->hcontext, initialize_k5e1_error_table_r); + +#ifdef COM_ERR_BINDDOMAIN_krb5 + bindtextdomain(COM_ERR_BINDDOMAIN_krb5, HEIMDAL_LOCALEDIR); + bindtextdomain(COM_ERR_BINDDOMAIN_asn1, HEIMDAL_LOCALEDIR); + bindtextdomain(COM_ERR_BINDDOMAIN_heim, HEIMDAL_LOCALEDIR); + bindtextdomain(COM_ERR_BINDDOMAIN_k524, HEIMDAL_LOCALEDIR); +#endif + +#ifdef PKINIT + heim_add_et_list(context->hcontext, initialize_hx_error_table_r); +#ifdef COM_ERR_BINDDOMAIN_hx + bindtextdomain(COM_ERR_BINDDOMAIN_hx, HEIMDAL_LOCALEDIR); +#endif +#endif +} + +/** + * Make the kerberos library default to the admin KDC. + * + * @param context Kerberos 5 context. + * @param flag boolean flag to select if the use the admin KDC or not. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION void KRB5_LIB_CALL +krb5_set_use_admin_kdc (krb5_context context, krb5_boolean flag) +{ + context->use_admin_kdc = flag; +} + +/** + * Make the kerberos library default to the admin KDC. + * + * @param context Kerberos 5 context. + * + * @return boolean flag to telling the context will use admin KDC as the default KDC. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL +krb5_get_use_admin_kdc (krb5_context context) +{ + return context->use_admin_kdc; +} + +/** + * Add extra address to the address list that the library will add to + * the client's address list when communicating with the KDC. + * + * @param context Kerberos 5 context. + * @param addresses addreses to add + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_add_extra_addresses(krb5_context context, krb5_addresses *addresses) +{ + + if(context->extra_addresses) + return krb5_append_addresses(context, + context->extra_addresses, addresses); + else + return krb5_set_extra_addresses(context, addresses); +} + +/** + * Set extra address to the address list that the library will add to + * the client's address list when communicating with the KDC. + * + * @param context Kerberos 5 context. + * @param addresses addreses to set + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_set_extra_addresses(krb5_context context, const krb5_addresses *addresses) +{ + if(context->extra_addresses) + krb5_free_addresses(context, context->extra_addresses); + + if(addresses == NULL) { + if(context->extra_addresses != NULL) { + free(context->extra_addresses); + context->extra_addresses = NULL; + } + return 0; + } + if(context->extra_addresses == NULL) { + context->extra_addresses = malloc(sizeof(*context->extra_addresses)); + if (context->extra_addresses == NULL) + return krb5_enomem(context); + } + return krb5_copy_addresses(context, addresses, context->extra_addresses); +} + +/** + * Get extra address to the address list that the library will add to + * the client's address list when communicating with the KDC. + * + * @param context Kerberos 5 context. + * @param addresses addreses to set + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_get_extra_addresses(krb5_context context, krb5_addresses *addresses) +{ + if(context->extra_addresses == NULL) { + memset(addresses, 0, sizeof(*addresses)); + return 0; + } + return krb5_copy_addresses(context,context->extra_addresses, addresses); +} + +/** + * Add extra addresses to ignore when fetching addresses from the + * underlaying operating system. + * + * @param context Kerberos 5 context. + * @param addresses addreses to ignore + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_add_ignore_addresses(krb5_context context, krb5_addresses *addresses) +{ + + if(context->ignore_addresses) + return krb5_append_addresses(context, + context->ignore_addresses, addresses); + else + return krb5_set_ignore_addresses(context, addresses); +} + +/** + * Set extra addresses to ignore when fetching addresses from the + * underlaying operating system. + * + * @param context Kerberos 5 context. + * @param addresses addreses to ignore + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_set_ignore_addresses(krb5_context context, const krb5_addresses *addresses) +{ + if(context->ignore_addresses) + krb5_free_addresses(context, context->ignore_addresses); + if(addresses == NULL) { + if(context->ignore_addresses != NULL) { + free(context->ignore_addresses); + context->ignore_addresses = NULL; + } + return 0; + } + if(context->ignore_addresses == NULL) { + context->ignore_addresses = malloc(sizeof(*context->ignore_addresses)); + if (context->ignore_addresses == NULL) + return krb5_enomem(context); + } + return krb5_copy_addresses(context, addresses, context->ignore_addresses); +} + +/** + * Get extra addresses to ignore when fetching addresses from the + * underlaying operating system. + * + * @param context Kerberos 5 context. + * @param addresses list addreses ignored + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_get_ignore_addresses(krb5_context context, krb5_addresses *addresses) +{ + if(context->ignore_addresses == NULL) { + memset(addresses, 0, sizeof(*addresses)); + return 0; + } + return krb5_copy_addresses(context, context->ignore_addresses, addresses); +} + +/** + * Set version of fcache that the library should use. + * + * @param context Kerberos 5 context. + * @param version version number. + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_set_fcache_version(krb5_context context, int version) +{ + context->fcache_vno = version; + return 0; +} + +/** + * Get version of fcache that the library should use. + * + * @param context Kerberos 5 context. + * @param version version number. + * + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_get_fcache_version(krb5_context context, int *version) +{ + *version = context->fcache_vno; + return 0; +} + +/** + * Runtime check if the Kerberos library was complied with thread support. + * + * @return TRUE if the library was compiled with thread support, FALSE if not. + * + * @ingroup krb5 + */ + + +KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL +krb5_is_thread_safe(void) +{ +#ifdef ENABLE_PTHREAD_SUPPORT + return TRUE; +#else + return FALSE; +#endif +} + +/** + * Set if the library should use DNS to canonicalize hostnames. + * + * @param context Kerberos 5 context. + * @param flag if its dns canonicalizion is used or not. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION void KRB5_LIB_CALL +krb5_set_dns_canonicalize_hostname (krb5_context context, krb5_boolean flag) +{ + if (flag) + context->flags |= KRB5_CTX_F_DNS_CANONICALIZE_HOSTNAME; + else + context->flags &= ~KRB5_CTX_F_DNS_CANONICALIZE_HOSTNAME; +} + +/** + * Get if the library uses DNS to canonicalize hostnames. + * + * @param context Kerberos 5 context. + * + * @return return non zero if the library uses DNS to canonicalize hostnames. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL +krb5_get_dns_canonicalize_hostname (krb5_context context) +{ + return (context->flags & KRB5_CTX_F_DNS_CANONICALIZE_HOSTNAME) ? 1 : 0; +} + +/** + * Get current offset in time to the KDC. + * + * @param context Kerberos 5 context. + * @param sec seconds part of offset. + * @param usec micro seconds part of offset. + * + * @return returns zero + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_get_kdc_sec_offset (krb5_context context, int32_t *sec, int32_t *usec) +{ + if (sec) + *sec = context->kdc_sec_offset; + if (usec) + *usec = context->kdc_usec_offset; + return 0; +} + +/** + * Set current offset in time to the KDC. + * + * @param context Kerberos 5 context. + * @param sec seconds part of offset. + * @param usec micro seconds part of offset. + * + * @return returns zero + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +krb5_set_kdc_sec_offset (krb5_context context, int32_t sec, int32_t usec) +{ + context->kdc_sec_offset = sec; + if (usec >= 0) + context->kdc_usec_offset = usec; + return 0; +} + +/** + * Get max time skew allowed. + * + * @param context Kerberos 5 context. + * + * @return timeskew in seconds. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION time_t KRB5_LIB_CALL +krb5_get_max_time_skew (krb5_context context) +{ + return context->max_skew; +} + +/** + * Set max time skew allowed. + * + * @param context Kerberos 5 context. + * @param t timeskew in seconds. + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION void KRB5_LIB_CALL +krb5_set_max_time_skew (krb5_context context, time_t t) +{ + context->max_skew = t; +} + +/* + * Init encryption types in len, val with etypes. + * + * @param context Kerberos 5 context. + * @param pdu_type type of pdu + * @param len output length of val. + * @param val output array of enctypes. + * @param etypes etypes to set val and len to, if NULL, use default enctypes. + + * @return Returns 0 to indicate success. Otherwise an kerberos et + * error code is returned, see krb5_get_error_message(). + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +_krb5_init_etype(krb5_context context, + krb5_pdu pdu_type, + unsigned *len, + krb5_enctype **val, + const krb5_enctype *etypes) +{ + krb5_error_code ret; + + if (etypes == NULL) + ret = krb5_get_default_in_tkt_etypes(context, pdu_type, val); + else + ret = copy_enctypes(context, etypes, val); + if (ret) + return ret; + + if (len) { + *len = 0; + while ((*val)[*len] != KRB5_ENCTYPE_NULL) + (*len)++; + } + return 0; +} + +/* + * Allow homedir access + */ + +KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL +_krb5_homedir_access(krb5_context context) +{ + if (context) + return !!(context->flags & KRB5_CTX_F_HOMEDIR_ACCESS); + return !issuid(); +} + +/** + * Enable and disable home directory access on either the global state + * or the krb5_context state. By calling krb5_set_home_dir_access() + * with context set to NULL, the global state is configured otherwise + * the state for the krb5_context is modified. + * + * For home directory access to be allowed, both the global state and + * the krb5_context state have to be allowed. + * + * @param context a Kerberos 5 context or NULL + * @param allow allow if TRUE home directory + * @return the old value + * + * @ingroup krb5 + */ + +KRB5_LIB_FUNCTION krb5_boolean KRB5_LIB_CALL +krb5_set_home_dir_access(krb5_context context, krb5_boolean allow) +{ + krb5_boolean old = _krb5_homedir_access(context); + + if (context) { + if (allow) + context->flags |= KRB5_CTX_F_HOMEDIR_ACCESS; + else + context->flags &= ~KRB5_CTX_F_HOMEDIR_ACCESS; + heim_context_set_homedir_access(context->hcontext, allow ? 1 : 0); + } + + return old; +} + |