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+/*
+ * Copyright (c) 2013, 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 "attrs.h"
+#include "compat.h"
+#include "debug.h"
+#include "extract.h"
+#include "iter.h"
+#include "message.h"
+#include "oid.h"
+#include "pkcs11.h"
+#include "pkcs11x.h"
+#include "save.h"
+#include "tool.h"
+
+#include <assert.h>
+#include <ctype.h>
+#include <getopt.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static bool
+filter_argument (const char *optarg,
+ P11KitUri **uri,
+ CK_ATTRIBUTE **match,
+ int *flags)
+{
+ CK_ATTRIBUTE *attrs;
+ int ret;
+
+ CK_OBJECT_CLASS vcertificate = CKO_CERTIFICATE;
+ CK_ULONG vauthority = 2;
+ CK_CERTIFICATE_TYPE vx509 = CKC_X_509;
+
+ CK_ATTRIBUTE certificate = { CKA_CLASS, &vcertificate, sizeof (vcertificate) };
+ CK_ATTRIBUTE authority = { CKA_CERTIFICATE_CATEGORY, &vauthority, sizeof (vauthority) };
+ CK_ATTRIBUTE x509 = { CKA_CERTIFICATE_TYPE, &vx509, sizeof (vx509) };
+
+ if (strncmp (optarg, "pkcs11:", 7) == 0) {
+ if (*uri != NULL) {
+ p11_message ("only one pkcs11 uri filter may be specified");
+ return false;
+ }
+ *uri = p11_kit_uri_new ();
+ ret = p11_kit_uri_parse (optarg, P11_KIT_URI_FOR_OBJECT_ON_TOKEN_AND_MODULE, *uri);
+ if (ret != P11_KIT_URI_OK) {
+ p11_message ("couldn't parse pkcs11 uri filter: %s", optarg);
+ return false;
+ }
+ return true;
+ }
+
+ if (strcmp (optarg, "ca-anchors") == 0) {
+ attrs = p11_attrs_build (NULL, &certificate, &authority, &x509, NULL);
+ *flags |= P11_EXTRACT_ANCHORS | P11_EXTRACT_COLLAPSE;
+
+ } else if (strcmp (optarg, "trust-policy") == 0) {
+ attrs = p11_attrs_build (NULL, &certificate, &x509, NULL);
+ *flags |= P11_EXTRACT_ANCHORS | P11_EXTRACT_BLACKLIST | P11_EXTRACT_COLLAPSE;
+
+ } else if (strcmp (optarg, "blacklist") == 0) {
+ attrs = p11_attrs_build (NULL, &certificate, &x509, NULL);
+ *flags |= P11_EXTRACT_BLACKLIST | P11_EXTRACT_COLLAPSE;
+
+ } else if (strcmp (optarg, "certificates") == 0) {
+ attrs = p11_attrs_build (NULL, &certificate, &x509, NULL);
+ *flags |= P11_EXTRACT_COLLAPSE;
+
+ } else {
+ p11_message ("unsupported or unrecognized filter: %s", optarg);
+ return false;
+ }
+
+ if (*match != NULL) {
+ p11_message ("a conflicting filter has already been specified");
+ p11_attrs_free (attrs);
+ return false;
+ }
+
+ *match = attrs;
+ return true;
+}
+
+static int
+is_valid_oid_rough (const char *string)
+{
+ size_t len;
+
+ len = strlen (string);
+
+ /* Rough check if a valid OID */
+ return (strspn (string, "0123456789.") == len &&
+ !strstr (string, "..") && string[0] != '\0' && string[0] != '.' &&
+ string[len - 1] != '.');
+}
+
+static bool
+purpose_argument (const char *optarg,
+ p11_extract_info *ex)
+{
+ const char *oid;
+
+ if (strcmp (optarg, "server-auth") == 0) {
+ oid = P11_OID_SERVER_AUTH_STR;
+ } else if (strcmp (optarg, "client-auth") == 0) {
+ oid = P11_OID_CLIENT_AUTH_STR;
+ } else if (strcmp (optarg, "email-protection") == 0 || strcmp (optarg, "email") == 0) {
+ oid = P11_OID_EMAIL_PROTECTION_STR;
+ } else if (strcmp (optarg, "code-signing") == 0) {
+ oid = P11_OID_CODE_SIGNING_STR;
+ } else if (strcmp (optarg, "ipsec-end-system") == 0) {
+ oid = P11_OID_IPSEC_END_SYSTEM_STR;
+ } else if (strcmp (optarg, "ipsec-tunnel") == 0) {
+ oid = P11_OID_IPSEC_TUNNEL_STR;
+ } else if (strcmp (optarg, "ipsec-user") == 0) {
+ oid = P11_OID_IPSEC_USER_STR;
+ } else if (strcmp (optarg, "time-stamping") == 0) {
+ oid = P11_OID_TIME_STAMPING_STR;
+ } else if (is_valid_oid_rough (optarg)) {
+ oid = optarg;
+ } else {
+ p11_message ("unsupported or unregonized purpose: %s", optarg);
+ return false;
+ }
+
+ p11_extract_info_limit_purpose (ex, oid);
+ return true;
+}
+
+static bool
+format_argument (const char *optarg,
+ p11_extract_func *func)
+{
+ int i;
+
+ /*
+ * Certain formats do not support expressive trust information.
+ * So the caller should limit the supported purposes when asking
+ * for trust information.
+ */
+
+ static const struct {
+ const char *format;
+ p11_extract_func func;
+ } formats[] = {
+ { "x509-file", p11_extract_x509_file, },
+ { "x509-directory", p11_extract_x509_directory, },
+ { "pem-bundle", p11_extract_pem_bundle, },
+ { "pem-directory", p11_extract_pem_directory },
+ { "java-cacerts", p11_extract_jks_cacerts },
+ { "openssl-bundle", p11_extract_openssl_bundle },
+ { "openssl-directory", p11_extract_openssl_directory },
+ { NULL },
+ };
+
+ if (*func != NULL) {
+ p11_message ("a format was already specified");
+ return false;
+ }
+
+ for (i = 0; formats[i].format != NULL; i++) {
+ if (strcmp (optarg, formats[i].format) == 0) {
+ *func = formats[i].func;
+ break;
+ }
+ }
+
+ if (*func == NULL) {
+ p11_message ("unsupported or unrecognized format: %s", optarg);
+ return false;
+ }
+
+ return true;
+}
+
+static void
+limit_modules_if_necessary (CK_FUNCTION_LIST_PTR *modules,
+ int flags)
+{
+ char *string;
+ int i, out;
+
+ /*
+ * We only "believe" the CKA_TRUSTED and CKA_X_DISTRUSTED attributes
+ * we get from modules explicitly marked as containing trust-policy.
+ */
+
+ if ((flags & (P11_EXTRACT_ANCHORS | P11_EXTRACT_BLACKLIST)) == 0)
+ return;
+
+ /* Count the number of modules */
+ for (out = 0; modules[out] != NULL; out++);
+
+ if (out == 0)
+ return;
+
+ /* TODO: This logic will move once we merge our p11-kit managed code */
+ for (i = 0, out = 0; modules[i] != NULL; i++) {
+ string = p11_kit_config_option (modules[i], "trust-policy");
+ if (string && strcmp (string, "yes") == 0)
+ modules[out++] = modules[i];
+ else if (string && strcmp (string, "no") != 0)
+ p11_message ("skipping module with invalid 'trust-policy' setting: %s", string);
+ free (string);
+ }
+
+ if (out == 0)
+ p11_message ("no modules containing trust policy are registered");
+}
+
+static bool
+validate_filter_and_format (p11_extract_info *ex,
+ p11_extract_func func,
+ CK_ATTRIBUTE *match)
+{
+ int i;
+
+ /*
+ * These are the extract functions that contain purpose information.
+ * If we're being asked to export anchors, and the extract function does
+ * not support, and the caller has not specified a purpose, then add a
+ * default purpose to limit to.
+ */
+
+ static p11_extract_func supports_trust_policy[] = {
+ p11_extract_openssl_bundle,
+ p11_extract_openssl_directory,
+ NULL
+ };
+
+ for (i = 0; supports_trust_policy[i] != NULL; i++) {
+ if (func == supports_trust_policy[i])
+ return true;
+ }
+
+ if ((ex->flags & P11_EXTRACT_ANCHORS) &&
+ (ex->flags & P11_EXTRACT_BLACKLIST)) {
+ /*
+ * If we're extracting *both* anchors and blacklist, then we must have
+ * a format that can represent the different types of information.
+ */
+
+ p11_message ("format does not support trust policy");
+ return false;
+
+ } else if (ex->flags & P11_EXTRACT_ANCHORS) {
+
+ /*
+ * If we're extracting anchors, then we must have either limited the
+ * purposes, or have a format that can represent multiple purposes.
+ */
+
+ if (!ex->limit_to_purposes) {
+ p11_message ("format does not support multiple purposes, defaulting to 'server-auth'");
+ p11_extract_info_limit_purpose (ex, P11_OID_SERVER_AUTH_STR);
+ }
+ }
+
+ return true;
+}
+
+int
+p11_trust_extract (int argc,
+ char **argv)
+{
+ p11_extract_func format = NULL;
+ CK_FUNCTION_LIST_PTR *modules;
+ P11KitIter *iter;
+ p11_extract_info ex;
+ CK_ATTRIBUTE *match;
+ P11KitUri *uri;
+ int opt = 0;
+ int ret;
+
+ enum {
+ opt_overwrite = 'f',
+ opt_verbose = 'v',
+ opt_quiet = 'q',
+ opt_help = 'h',
+ opt_filter = 1000,
+ opt_purpose,
+ opt_format,
+ opt_comment,
+ };
+
+ struct option options[] = {
+ { "filter", required_argument, NULL, opt_filter },
+ { "format", required_argument, NULL, opt_format },
+ { "purpose", required_argument, NULL, opt_purpose },
+ { "overwrite", no_argument, NULL, opt_overwrite },
+ { "comment", no_argument, NULL, opt_comment },
+ { "verbose", no_argument, NULL, opt_verbose },
+ { "quiet", no_argument, NULL, opt_quiet },
+ { "help", no_argument, NULL, opt_help },
+ { 0 },
+ };
+
+ p11_tool_desc usages[] = {
+ { 0, "usage: p11-kit extract --format=<output> <destination>" },
+ { opt_filter,
+ "filter of what to export\n"
+ " ca-anchors certificate anchors (default)\n"
+ " blacklist blacklisted certificates\n"
+ " trust-policy anchors and blacklist\n"
+ " certificates all certificates\n"
+ " pkcs11:object=xx a PKCS#11 URI",
+ "what",
+ },
+ { opt_format,
+ "format to extract to\n"
+ " x509-file DER X.509 certificate file\n"
+ " x509-directory directory of X.509 certificates\n"
+ " pem-bundle file containing multiple PEM blocks\n"
+ " pem-directory directory of PEM files\n"
+ " openssl-bundle OpenSSL specific PEM bundle\n"
+ " openssl-directory directory of OpenSSL specific files\n"
+ " java-cacerts java keystore cacerts file",
+ "type"
+ },
+ { opt_purpose,
+ "limit to certificates usable for the purpose\n"
+ " server-auth for authenticating servers\n"
+ " client-auth for authenticating clients\n"
+ " email for email protection\n"
+ " code-signing for authenticating signed code\n"
+ " 1.2.3.4.5... an arbitrary object id",
+ "usage"
+ },
+ { opt_overwrite, "overwrite output file or directory" },
+ { opt_comment, "add comments to bundles if possible" },
+ { opt_verbose, "show verbose debug output", },
+ { opt_quiet, "supress command output", },
+ { 0 },
+ };
+
+ match = NULL;
+ uri = NULL;
+
+ p11_extract_info_init (&ex);
+
+ while ((opt = p11_tool_getopt (argc, argv, options)) != -1) {
+ switch (opt) {
+ case opt_verbose:
+ case opt_quiet:
+ break;
+
+ case opt_overwrite:
+ ex.flags |= P11_SAVE_OVERWRITE;
+ break;
+ case opt_comment:
+ ex.flags |= P11_EXTRACT_COMMENT;
+ break;
+ case opt_filter:
+ if (!filter_argument (optarg, &uri, &match, &ex.flags))
+ return 2;
+ break;
+ case opt_purpose:
+ if (!purpose_argument (optarg, &ex))
+ return 2;
+ break;
+ case opt_format:
+ if (!format_argument (optarg, &format))
+ return 2;
+ break;
+ case 'h':
+ p11_tool_usage (usages, options);
+ return 0;
+ case '?':
+ return 2;
+ default:
+ assert_not_reached ();
+ break;
+ }
+ } while (opt != -1);
+
+ argc -= optind;
+ argv += optind;
+
+ if (argc != 1) {
+ p11_message ("specify one destination file or directory");
+ return 2;
+ }
+ ex.destination = argv[0];
+
+ if (!format) {
+ p11_message ("no output format specified");
+ return 2;
+ }
+
+ /* If nothing that was useful to enumerate was specified, then bail */
+ if (uri == NULL && match == NULL) {
+ p11_message ("no filter specified, defaulting to 'ca-anchors'");
+ filter_argument ("ca-anchors", &uri, &match, &ex.flags);
+ }
+
+ if (!validate_filter_and_format (&ex, format, match))
+ return 1;
+
+ if (uri && p11_kit_uri_any_unrecognized (uri))
+ p11_message ("uri contained unrecognized components, nothing will be extracted");
+
+ modules = p11_kit_modules_load_and_initialize (0);
+ if (!modules)
+ return 1;
+
+ limit_modules_if_necessary (modules, ex.flags);
+
+ iter = p11_kit_iter_new (uri);
+
+ p11_kit_iter_add_callback (iter, p11_extract_info_load_filter, &ex, NULL);
+ p11_kit_iter_add_filter (iter, match, p11_attrs_count (match));
+
+ p11_kit_iter_begin (iter, modules);
+
+ ret = (format) (iter, &ex) ? 0 : 1;
+
+ p11_extract_info_cleanup (&ex);
+ p11_kit_iter_free (iter);
+ p11_kit_uri_free (uri);
+
+ p11_kit_modules_finalize (modules);
+ p11_kit_modules_release (modules);
+
+ return ret;
+}
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