krb5_error_code KRB5_CALLCONV
krb5_mcc_resolve (krb5_context context, krb5_ccache *id, const char *residual)
{
krb5_ccache lid;
krb5_mcc_list_node *ptr;
krb5_error_code err;
krb5_mcc_data *d;
err = k5_cc_mutex_lock(context, &krb5int_mcc_mutex);
if (err)
return err;
for (ptr = mcc_head; ptr; ptr=ptr->next)
if (!strcmp(ptr->cache->name, residual))
break;
if (ptr)
d = ptr->cache;
else {
err = new_mcc_data(residual, &d);
if (err) {
k5_cc_mutex_unlock(context, &krb5int_mcc_mutex);
return err;
}
}
k5_cc_mutex_unlock(context, &krb5int_mcc_mutex);
lid = (krb5_ccache) malloc(sizeof(struct _krb5_ccache));
if (lid == NULL)
return KRB5_CC_NOMEM;
lid->ops = &krb5_mcc_ops;
lid->data = d;
*id = lid;
return KRB5_OK;
}
krb5_error_code KRB5_CALLCONV
krb5_mcc_generate_new (krb5_context context, krb5_ccache *id)
{
krb5_ccache lid;
char uniquename[8];
krb5_error_code err;
krb5_mcc_data *d;
/* Allocate memory */
lid = (krb5_ccache) malloc(sizeof(struct _krb5_ccache));
if (lid == NULL)
return KRB5_CC_NOMEM;
lid->ops = &krb5_mcc_ops;
err = k5_cc_mutex_lock(context, &krb5int_mcc_mutex);
if (err) {
free(lid);
return err;
}
/* Check for uniqueness with mutex locked to avoid race conditions */
while (1) {
krb5_mcc_list_node *ptr;
err = krb5int_random_string (context, uniquename, sizeof (uniquename));
if (err) {
k5_cc_mutex_unlock(context, &krb5int_mcc_mutex);
free(lid);
return err;
}
for (ptr = mcc_head; ptr; ptr=ptr->next) {
if (!strcmp(ptr->cache->name, uniquename)) {
break; /* got a match, loop again */
}
}
if (!ptr) break; /* got to the end without finding a match */
}
err = new_mcc_data(uniquename, &d);
k5_cc_mutex_unlock(context, &krb5int_mcc_mutex);
if (err) {
free(lid);
return err;
}
lid->data = d;
*id = lid;
krb5_change_cache ();
return KRB5_OK;
}
krb5_error_code KRB5_CALLCONV
krb5_mcc_generate_new (krb5_context context, krb5_ccache *id)
{
krb5_ccache lid;
char uniquename[8];
krb5_error_code err;
krb5_mcc_data *d;
/* Allocate memory */
lid = (krb5_ccache) malloc(sizeof(struct _krb5_ccache));
if (lid == NULL)
return KRB5_CC_NOMEM;
lid->ops = &krb5_mcc_ops;
k5_cc_mutex_lock(context, &krb5int_mcc_mutex);
init_table(context);
/* Check for uniqueness with mutex locked to avoid race conditions */
while (1) {
err = krb5int_random_string (context, uniquename, sizeof (uniquename));
if (err) {
k5_cc_mutex_unlock(context, &krb5int_mcc_mutex);
free(lid);
return err;
}
if (k5_hashtab_get(mcc_hashtab, uniquename,
strlen(uniquename)) == NULL)
break;
}
err = new_mcc_data(uniquename, &d);
k5_cc_mutex_unlock(context, &krb5int_mcc_mutex);
if (err) {
free(lid);
return err;
}
lid->data = d;
*id = lid;
krb5_change_cache ();
return KRB5_OK;
}
krb5_error_code KRB5_CALLCONV
krb5_mcc_resolve (krb5_context context, krb5_ccache *id, const char *residual)
{
krb5_os_context os_ctx = &context->os_context;
krb5_ccache lid;
krb5_mcc_list_node *ptr;
krb5_error_code err;
krb5_mcc_data *d;
k5_cc_mutex_lock(context, &krb5int_mcc_mutex);
for (ptr = mcc_head; ptr; ptr=ptr->next)
if (!strcmp(ptr->cache->name, residual))
break;
if (ptr)
d = ptr->cache;
else {
err = new_mcc_data(residual, &d);
if (err) {
k5_cc_mutex_unlock(context, &krb5int_mcc_mutex);
return err;
}
}
k5_cc_mutex_unlock(context, &krb5int_mcc_mutex);
lid = (krb5_ccache) malloc(sizeof(struct _krb5_ccache));
if (lid == NULL)
return KRB5_CC_NOMEM;
if ((context->library_options & KRB5_LIBOPT_SYNC_KDCTIME) &&
!(os_ctx->os_flags & KRB5_OS_TOFFSET_VALID)) {
/* Use the time offset from the cache entry */
os_ctx->time_offset = d->time_offset;
os_ctx->usec_offset = d->usec_offset;
os_ctx->os_flags = ((os_ctx->os_flags & ~KRB5_OS_TOFFSET_TIME) |
KRB5_OS_TOFFSET_VALID);
}
lid->ops = &krb5_mcc_ops;
lid->data = d;
*id = lid;
return KRB5_OK;
}
krb5_error_code KRB5_CALLCONV
krb5_mcc_resolve (krb5_context context, krb5_ccache *id, const char *residual)
{
krb5_os_context os_ctx = &context->os_context;
krb5_ccache lid;
krb5_error_code err;
krb5_mcc_data *d;
k5_cc_mutex_lock(context, &krb5int_mcc_mutex);
init_table(context);
d = k5_hashtab_get(mcc_hashtab, residual, strlen(residual));
if (d != NULL) {
k5_cc_mutex_lock(context, &d->lock);
d->refcount++;
k5_cc_mutex_unlock(context, &d->lock);
} else {
err = new_mcc_data(residual, &d);
if (err) {
k5_cc_mutex_unlock(context, &krb5int_mcc_mutex);
return err;
}
}
k5_cc_mutex_unlock(context, &krb5int_mcc_mutex);
lid = (krb5_ccache) malloc(sizeof(struct _krb5_ccache));
if (lid == NULL)
return KRB5_CC_NOMEM;
if ((context->library_options & KRB5_LIBOPT_SYNC_KDCTIME) &&
!(os_ctx->os_flags & KRB5_OS_TOFFSET_VALID)) {
/* Use the time offset from the cache entry */
os_ctx->time_offset = d->time_offset;
os_ctx->usec_offset = d->usec_offset;
os_ctx->os_flags = ((os_ctx->os_flags & ~KRB5_OS_TOFFSET_TIME) |
KRB5_OS_TOFFSET_VALID);
}
lid->ops = &krb5_mcc_ops;
lid->data = d;
*id = lid;
return KRB5_OK;
}
