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diff --git a/trust/asn1.c b/trust/asn1.c
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+/*
+ * Copyright (C) 2012 Red Hat Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the
+ * following disclaimer.
+ * * 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.
+ * * The names of contributors to this software may not be
+ * used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ * Author: Stef Walter <stefw@redhat.com>
+ */
+
+#include "config.h"
+
+#include "asn1.h"
+#define P11_DEBUG_FLAG P11_DEBUG_TRUST
+#include "debug.h"
+#include "oid.h"
+
+#include "openssl.asn.h"
+#include "pkix.asn.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void
+free_asn1_def (void *data)
+{
+ node_asn *def = data;
+ asn1_delete_structure (&def);
+}
+
+struct {
+ const ASN1_ARRAY_TYPE* tab;
+ const char *prefix;
+ int prefix_len;
+} asn1_tabs[] = {
+ { pkix_asn1_tab, "PKIX1.", 6 },
+ { openssl_asn1_tab, "OPENSSL.", 8 },
+ { NULL, },
+};
+
+p11_dict *
+p11_asn1_defs_load (void)
+{
+ char message[ASN1_MAX_ERROR_DESCRIPTION_SIZE] = { 0, };
+ node_asn *def;
+ p11_dict *defs;
+ int ret;
+ int i;
+
+ defs = p11_dict_new (p11_dict_str_hash, p11_dict_str_equal, NULL, free_asn1_def);
+
+ for (i = 0; asn1_tabs[i].tab != NULL; i++) {
+
+ def = NULL;
+ ret = asn1_array2tree (asn1_tabs[i].tab, &def, message);
+ if (ret != ASN1_SUCCESS) {
+ p11_debug_precond ("failed to load %s* definitions: %s: %s\n",
+ asn1_tabs[i].prefix, asn1_strerror (ret), message);
+ return NULL;
+ }
+
+ if (!p11_dict_set (defs, (void *)asn1_tabs[i].prefix, def))
+ return_val_if_reached (NULL);
+ }
+
+ return defs;
+}
+
+static node_asn *
+lookup_def (p11_dict *asn1_defs,
+ const char *struct_name)
+{
+ int i;
+
+ for (i = 0; asn1_tabs[i].tab != NULL; i++) {
+ if (strncmp (struct_name, asn1_tabs[i].prefix, asn1_tabs[i].prefix_len) == 0)
+ return p11_dict_get (asn1_defs, asn1_tabs[i].prefix);
+ }
+
+ p11_debug_precond ("unknown prefix for element: %s\n", struct_name);
+ return NULL;
+}
+
+node_asn *
+p11_asn1_create (p11_dict *asn1_defs,
+ const char *struct_name)
+{
+ node_asn *def;
+ node_asn *asn;
+ int ret;
+
+ return_val_if_fail (asn1_defs != NULL, NULL);
+
+ def = lookup_def (asn1_defs, struct_name);
+ return_val_if_fail (def != NULL, NULL);
+
+ ret = asn1_create_element (def, struct_name, &asn);
+ if (ret != ASN1_SUCCESS) {
+ p11_debug_precond ("failed to create element %s: %s\n",
+ struct_name, asn1_strerror (ret));
+ return NULL;
+ }
+
+ return asn;
+}
+
+node_asn *
+p11_asn1_decode (p11_dict *asn1_defs,
+ const char *struct_name,
+ const unsigned char *der,
+ size_t der_len,
+ char *message)
+{
+ char msg[ASN1_MAX_ERROR_DESCRIPTION_SIZE];
+ node_asn *asn = NULL;
+ int ret;
+
+ return_val_if_fail (asn1_defs != NULL, NULL);
+
+ asn = p11_asn1_create (asn1_defs, struct_name);
+ return_val_if_fail (asn != NULL, NULL);
+
+ /* asn1_der_decoding destroys the element if fails */
+ ret = asn1_der_decoding (&asn, der, der_len, message ? message : msg);
+
+ if (ret != ASN1_SUCCESS) {
+ /* If caller passed in a message buffer, assume they're logging */
+ if (!message) {
+ p11_debug ("couldn't parse %s: %s: %s",
+ struct_name, asn1_strerror (ret), msg);
+ }
+ return NULL;
+ }
+
+ return asn;
+}
+
+unsigned char *
+p11_asn1_encode (node_asn *asn,
+ size_t *der_len)
+{
+ char message[ASN1_MAX_ERROR_DESCRIPTION_SIZE];
+ unsigned char *der;
+ int len;
+ int ret;
+
+ return_val_if_fail (der_len != NULL, NULL);
+
+ len = 0;
+ ret = asn1_der_coding (asn, "", NULL, &len, message);
+ return_val_if_fail (ret != ASN1_SUCCESS, NULL);
+
+ if (ret == ASN1_MEM_ERROR) {
+ der = malloc (len);
+ return_val_if_fail (der != NULL, NULL);
+
+ ret = asn1_der_coding (asn, "", der, &len, message);
+ }
+
+ if (ret != ASN1_SUCCESS) {
+ p11_debug_precond ("failed to encode: %s\n", message);
+ return NULL;
+ }
+
+ if (der_len)
+ *der_len = len;
+ return der;
+}
+
+ssize_t
+p11_asn1_tlv_length (const unsigned char *data,
+ size_t length)
+{
+ unsigned char cls;
+ int counter = 0;
+ int cb, len;
+ unsigned long tag;
+
+ if (asn1_get_tag_der (data, length, &cls, &cb, &tag) == ASN1_SUCCESS) {
+ counter += cb;
+ len = asn1_get_length_der (data + cb, length - cb, &cb);
+ counter += cb;
+ if (len >= 0) {
+ len += counter;
+ if (length >= len)
+ return len;
+ }
+ }
+
+ return -1;
+}
+
+typedef struct {
+ node_asn *node;
+ char *struct_name;
+ size_t length;
+} asn1_item;
+
+static void
+free_asn1_item (void *data)
+{
+ asn1_item *item = data;
+ free (item->struct_name);
+ asn1_delete_structure (&item->node);
+ free (item);
+}
+
+struct _p11_asn1_cache {
+ p11_dict *defs;
+ p11_dict *items;
+};
+
+p11_asn1_cache *
+p11_asn1_cache_new (void)
+{
+ p11_asn1_cache *cache;
+
+ cache = calloc (1, sizeof (p11_asn1_cache));
+ return_val_if_fail (cache != NULL, NULL);
+
+ cache->defs = p11_asn1_defs_load ();
+ return_val_if_fail (cache->defs != NULL, NULL);
+
+ cache->items = p11_dict_new (p11_dict_direct_hash, p11_dict_direct_equal,
+ NULL, free_asn1_item);
+ return_val_if_fail (cache->items != NULL, NULL);
+
+ return cache;
+}
+
+node_asn *
+p11_asn1_cache_get (p11_asn1_cache *cache,
+ const char *struct_name,
+ const unsigned char *der,
+ size_t der_len)
+{
+ asn1_item *item;
+
+ return_val_if_fail (cache != NULL, NULL);
+ return_val_if_fail (struct_name != NULL, NULL);
+ return_val_if_fail (der != NULL, NULL);
+
+ item = p11_dict_get (cache->items, der);
+ if (item != NULL) {
+ return_val_if_fail (item->length == der_len, NULL);
+ return_val_if_fail (strcmp (item->struct_name, struct_name) == 0, NULL);
+ return item->node;
+ }
+
+ return NULL;
+}
+
+void
+p11_asn1_cache_take (p11_asn1_cache *cache,
+ node_asn *node,
+ const char *struct_name,
+ const unsigned char *der,
+ size_t der_len)
+{
+ asn1_item *item;
+
+ return_if_fail (cache != NULL);
+ return_if_fail (struct_name != NULL);
+ return_if_fail (der != NULL);
+ return_if_fail (der_len != 0);
+
+ item = calloc (1, sizeof (asn1_item));
+ return_if_fail (item != NULL);
+
+ item->length = der_len;
+ item->node = node;
+ item->struct_name = strdup (struct_name);
+ return_if_fail (item->struct_name != NULL);
+
+ if (!p11_dict_set (cache->items, (void *)der, item))
+ return_if_reached ();
+}
+
+void
+p11_asn1_cache_flush (p11_asn1_cache *cache)
+{
+ return_if_fail (cache != NULL);
+ p11_dict_clear (cache->items);
+}
+
+p11_dict *
+p11_asn1_cache_defs (p11_asn1_cache *cache)
+{
+ return_val_if_fail (cache != NULL, NULL);
+ return cache->defs;
+}
+
+void
+p11_asn1_cache_free (p11_asn1_cache *cache)
+{
+ if (!cache)
+ return;
+ p11_dict_free (cache->items);
+ p11_dict_free (cache->defs);
+ free (cache);
+}
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