const char * KRB5_CALLCONV
krb5_cc_default_name(krb5_context context)
{
krb5_os_context os_ctx;
char *profstr, *envstr;
if (!context || context->magic != KV5M_CONTEXT)
return NULL;
os_ctx = &context->os_context;
if (os_ctx->default_ccname != NULL)
return os_ctx->default_ccname;
/* Try the environment variable first. */
envstr = getenv(KRB5_ENV_CCNAME);
if (envstr != NULL) {
os_ctx->default_ccname = strdup(envstr);
return os_ctx->default_ccname;
}
if (profile_get_string(context->profile, KRB5_CONF_LIBDEFAULTS,
KRB5_CONF_DEFAULT_CCACHE_NAME, NULL, NULL,
&profstr) == 0 && profstr != NULL) {
(void)k5_expand_path_tokens(context, profstr, &os_ctx->default_ccname);
profile_release_string(profstr);
return os_ctx->default_ccname;
}
/* Fall back on the default ccache name for the OS. */
get_from_os(context);
return os_ctx->default_ccname;
}
krb5_error_code KRB5_CALLCONV
krb5_init_context_profile(profile_t profile, krb5_flags flags,
krb5_context *context_out)
{
krb5_context ctx = 0;
krb5_error_code retval;
struct {
krb5_timestamp now;
krb5_int32 now_usec;
long pid;
} seed_data;
krb5_data seed;
int tmp;
char *plugin_dir = NULL;
/* Verify some assumptions. If the assumptions hold and the
compiler is optimizing, this should result in no code being
executed. If we're guessing "unsigned long long" instead
of using uint64_t, the possibility does exist that we're
wrong. */
{
uint64_t i64;
assert(sizeof(i64) == 8);
i64 = 0, i64--, i64 >>= 62;
assert(i64 == 3);
i64 = 1, i64 <<= 31, i64 <<= 31, i64 <<= 1;
assert(i64 != 0);
i64 <<= 1;
assert(i64 == 0);
}
retval = krb5int_initialize_library();
if (retval)
return retval;
#if (defined(_WIN32))
/*
* Load the krbcc32.dll if necessary. We do this here so that
* we know to use API: later on during initialization.
* The context being NULL is ok.
*/
krb5_win_ccdll_load(ctx);
/*
* krb5_vercheck() is defined in win_glue.c, and this is
* where we handle the timebomb and version server checks.
*/
retval = krb5_vercheck();
if (retval)
return retval;
#endif
*context_out = NULL;
ctx = calloc(1, sizeof(struct _krb5_context));
if (!ctx)
return ENOMEM;
ctx->magic = KV5M_CONTEXT;
ctx->profile_secure = (flags & KRB5_INIT_CONTEXT_SECURE) != 0;
retval = k5_os_init_context(ctx, profile, flags);
if (retval)
goto cleanup;
ctx->trace_callback = NULL;
#ifndef DISABLE_TRACING
if (!ctx->profile_secure)
k5_init_trace(ctx);
#endif
retval = get_boolean(ctx, KRB5_CONF_ALLOW_WEAK_CRYPTO, 0, &tmp);
if (retval)
goto cleanup;
ctx->allow_weak_crypto = tmp;
retval = get_boolean(ctx, KRB5_CONF_IGNORE_ACCEPTOR_HOSTNAME, 0, &tmp);
if (retval)
goto cleanup;
ctx->ignore_acceptor_hostname = tmp;
retval = get_tristate(ctx, KRB5_CONF_DNS_CANONICALIZE_HOSTNAME, "fallback",
CANONHOST_FALLBACK, 1, &tmp);
if (retval)
goto cleanup;
ctx->dns_canonicalize_hostname = tmp;
/* initialize the prng (not well, but passable) */
if ((retval = krb5_c_random_os_entropy( ctx, 0, NULL)) !=0)
goto cleanup;
if ((retval = krb5_crypto_us_timeofday(&seed_data.now, &seed_data.now_usec)))
goto cleanup;
seed_data.pid = getpid ();
seed.length = sizeof(seed_data);
seed.data = (char *) &seed_data;
if ((retval = krb5_c_random_add_entropy(ctx, KRB5_C_RANDSOURCE_TIMING, &seed)))
goto cleanup;
ctx->default_realm = 0;
get_integer(ctx, KRB5_CONF_CLOCKSKEW, DEFAULT_CLOCKSKEW, &tmp);
ctx->clockskew = tmp;
/* DCE 1.1 and below only support CKSUMTYPE_RSA_MD4 (2) */
/* DCE add kdc_req_checksum_type = 2 to krb5.conf */
get_integer(ctx, KRB5_CONF_KDC_REQ_CHECKSUM_TYPE, CKSUMTYPE_RSA_MD5,
&tmp);
ctx->kdc_req_sumtype = tmp;
get_integer(ctx, KRB5_CONF_AP_REQ_CHECKSUM_TYPE, 0, &tmp);
ctx->default_ap_req_sumtype = tmp;
get_integer(ctx, KRB5_CONF_SAFE_CHECKSUM_TYPE, CKSUMTYPE_RSA_MD5_DES,
&tmp);
ctx->default_safe_sumtype = tmp;
get_integer(ctx, KRB5_CONF_KDC_DEFAULT_OPTIONS, KDC_OPT_RENEWABLE_OK,
&tmp);
ctx->kdc_default_options = tmp;
#define DEFAULT_KDC_TIMESYNC 1
get_integer(ctx, KRB5_CONF_KDC_TIMESYNC, DEFAULT_KDC_TIMESYNC, &tmp);
ctx->library_options = tmp ? KRB5_LIBOPT_SYNC_KDCTIME : 0;
retval = profile_get_string(ctx->profile, KRB5_CONF_LIBDEFAULTS,
KRB5_CONF_PLUGIN_BASE_DIR, 0,
DEFAULT_PLUGIN_BASE_DIR, &plugin_dir);
if (!retval)
retval = k5_expand_path_tokens(ctx, plugin_dir, &ctx->plugin_base_dir);
if (retval) {
TRACE_PROFILE_ERR(ctx, KRB5_CONF_PLUGIN_BASE_DIR,
KRB5_CONF_LIBDEFAULTS, retval);
goto cleanup;
}
/*
* We use a default file credentials cache of 3. See
* lib/krb5/krb/ccache/file/fcc.h for a description of the
* credentials cache types.
*
* Note: DCE 1.0.3a only supports a cache type of 1
* DCE 1.1 supports a cache type of 2.
*/
#define DEFAULT_CCACHE_TYPE 4
get_integer(ctx, KRB5_CONF_CCACHE_TYPE, DEFAULT_CCACHE_TYPE, &tmp);
ctx->fcc_default_format = tmp + 0x0500;
ctx->prompt_types = 0;
ctx->use_conf_ktypes = 0;
ctx->udp_pref_limit = -1;
/* It's OK if this fails */
(void)profile_get_string(ctx->profile, KRB5_CONF_LIBDEFAULTS,
KRB5_CONF_ERR_FMT, NULL, NULL, &ctx->err_fmt);
*context_out = ctx;
ctx = NULL;
cleanup:
profile_release_string(plugin_dir);
krb5_free_context(ctx);
return retval;
}
static void
get_from_os(krb5_context context)
{
(void)k5_expand_path_tokens(context, DEFCCNAME,
&context->os_context.default_ccname);
}
