--- /dev/null
+/*
+ * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+#include <stdio.h>
+#include <getopt.h>
+#include <ipxe/image.h>
+#include <ipxe/command.h>
+#include <ipxe/parseopt.h>
+#include <usr/imgmgmt.h>
+#include <usr/imgtrust.h>
+
+/** @file
+ *
+ * Image trust management commands
+ *
+ */
+
+/** "imgtrust" options */
+struct imgtrust_options {
+ /** Allow trusted images */
+ int allow;
+ /** Make trust requirement permanent */
+ int permanent;
+};
+
+/** "imgtrust" option list */
+static struct option_descriptor imgtrust_opts[] = {
+ OPTION_DESC ( "allow", 'a', no_argument,
+ struct imgtrust_options, allow, parse_flag ),
+ OPTION_DESC ( "permanent", 'p', no_argument,
+ struct imgtrust_options, permanent, parse_flag ),
+};
+
+/** "imgtrust" command descriptor */
+static struct command_descriptor imgtrust_cmd =
+ COMMAND_DESC ( struct imgtrust_options, imgtrust_opts, 0, 0,
+ "[--allow] [--permanent]" );
+
+/**
+ * The "imgtrust" command
+ *
+ * @v argc Argument count
+ * @v argv Argument list
+ * @ret rc Return status code
+ */
+static int imgtrust_exec ( int argc, char **argv ) {
+ struct imgtrust_options opts;
+ int rc;
+
+ /* Parse options */
+ if ( ( rc = parse_options ( argc, argv, &imgtrust_cmd, &opts ) ) != 0 )
+ return rc;
+
+ /* Set trust requirement */
+ if ( ( rc = image_set_trust ( ( ! opts.allow ),
+ opts.permanent ) ) != 0 ) {
+ printf ( "Could not set image trust requirement: %s\n",
+ strerror ( rc ) );
+ return rc;
+ }
+
+ return 0;
+}
+
+/** "imgverify" options */
+struct imgverify_options {
+ /** Required signer common name */
+ const char *signer;
+ /** Keep signature after verification */
+ int keep;
+};
+
+/** "imgverify" option list */
+static struct option_descriptor imgverify_opts[] = {
+ OPTION_DESC ( "signer", 's', required_argument,
+ struct imgverify_options, signer, parse_string ),
+ OPTION_DESC ( "keep", 'k', no_argument,
+ struct imgverify_options, keep, parse_flag ),
+};
+
+/** "imgverify" command descriptor */
+static struct command_descriptor imgverify_cmd =
+ COMMAND_DESC ( struct imgverify_options, imgverify_opts, 2, 2,
+ "[--signer <signer>] [--keep] <uri|image> "
+ "<signature uri|image>" );
+
+/**
+ * The "imgverify" command
+ *
+ * @v argc Argument count
+ * @v argv Argument list
+ * @ret rc Return status code
+ */
+static int imgverify_exec ( int argc, char **argv ) {
+ struct imgverify_options opts;
+ const char *image_name_uri;
+ const char *signature_name_uri;
+ struct image *image;
+ struct image *signature;
+ int rc;
+
+ /* Parse options */
+ if ( ( rc = parse_options ( argc, argv, &imgverify_cmd, &opts ) ) != 0 )
+ return rc;
+
+ /* Parse image name/URI string */
+ image_name_uri = argv[optind];
+
+ /* Parse signature name/URI string */
+ signature_name_uri = argv[ optind + 1 ];
+
+ /* Acquire the image */
+ if ( ( rc = imgacquire ( image_name_uri, &image ) ) != 0 )
+ goto err_acquire_image;
+
+ /* Acquire the signature image */
+ if ( ( rc = imgacquire ( signature_name_uri, &signature ) ) != 0 )
+ goto err_acquire_signature;
+
+ /* Verify image */
+ if ( ( rc = imgverify ( image, signature, opts.signer ) ) != 0 ) {
+ printf ( "Could not verify: %s\n", strerror ( rc ) );
+ goto err_verify;
+ }
+
+ /* Success */
+ rc = 0;
+
+ err_verify:
+ /* Discard signature unless --keep was specified */
+ if ( ! opts.keep )
+ unregister_image ( signature );
+ err_acquire_signature:
+ err_acquire_image:
+ return rc;
+}
+
+/** Image trust management commands */
+struct command image_trust_commands[] __command = {
+ {
+ .name = "imgtrust",
+ .exec = imgtrust_exec,
+ },
+ {
+ .name = "imgverify",
+ .exec = imgverify_exec,
+ },
+};
+
+/* Drag in objects typically required for signature verification */
+REQUIRE_OBJECT ( rsa );
+REQUIRE_OBJECT ( md5 );
+REQUIRE_OBJECT ( sha1 );
+REQUIRE_OBJECT ( sha256 );
--- /dev/null
+/*
+ * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdlib.h>
+#include <errno.h>
+#include <time.h>
+#include <ipxe/uaccess.h>
+#include <ipxe/image.h>
+#include <ipxe/cms.h>
+#include <usr/imgtrust.h>
+
+/** @file
+ *
+ * Image trust management
+ *
+ */
+
+/**
+ * Verify image using downloaded signature
+ *
+ * @v image Image to verify
+ * @v signature Image containing signature
+ * @v name Required common name, or NULL to allow any name
+ * @ret rc Return status code
+ */
+int imgverify ( struct image *image, struct image *signature,
+ const char *name ) {
+ size_t len;
+ void *data;
+ struct cms_signature sig;
+ time_t now;
+ int rc;
+
+ /* Mark image as untrusted */
+ image_untrust ( image );
+
+ /* Copy signature to internal memory */
+ len = signature->len;
+ data = malloc ( len );
+ if ( ! data ) {
+ rc = -ENOMEM;
+ goto err_alloc;
+ }
+ copy_from_user ( data, signature->data, 0, len );
+
+ /* Parse signature */
+ if ( ( rc = cms_parse ( &sig, data, len ) ) != 0 )
+ goto err_parse;
+
+ /* Use signature to verify image */
+ now = time ( NULL );
+ if ( ( rc = cms_verify ( &sig, image->data, image->len,
+ name, now, NULL ) ) != 0 )
+ goto err_verify;
+
+ /* Mark image as trusted */
+ image_trust ( image );
+
+ err_verify:
+ err_parse:
+ free ( data );
+ err_alloc:
+ return rc;
+}
projects / thirdparty / ipxe.git / commitdiff
