--- /dev/null
+/*
+ * Copyright (C) 2024 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#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/imgcrypt.h>
+
+/** @file
+ *
+ * Image encryption management commands
+ *
+ */
+
+/** "imgdecrypt" options */
+struct imgdecrypt_options {
+ /** Decrypted image name */
+ char *name;
+ /** Keep envelope after decryption */
+ int keep;
+ /** Download timeout */
+ unsigned long timeout;
+};
+
+/** "imgdecrypt" option list */
+static struct option_descriptor imgdecrypt_opts[] = {
+ OPTION_DESC ( "name", 'n', required_argument,
+ struct imgdecrypt_options, name, parse_string ),
+ OPTION_DESC ( "keep", 'k', no_argument,
+ struct imgdecrypt_options, keep, parse_flag ),
+ OPTION_DESC ( "timeout", 't', required_argument,
+ struct imgdecrypt_options, timeout, parse_timeout),
+};
+
+/** "imgdecrypt" command descriptor */
+static struct command_descriptor imgdecrypt_cmd =
+ COMMAND_DESC ( struct imgdecrypt_options, imgdecrypt_opts, 2, 2,
+ "<uri|image> <envelope uri|image>" );
+
+/**
+ * The "imgdecrypt" command
+ *
+ * @v argc Argument count
+ * @v argv Argument list
+ * @ret rc Return status code
+ */
+static int imgdecrypt_exec ( int argc, char **argv ) {
+ struct imgdecrypt_options opts;
+ const char *image_name_uri;
+ const char *envelope_name_uri;
+ struct image *image;
+ struct image *envelope;
+ int rc;
+
+ /* Parse options */
+ if ( ( rc = parse_options ( argc, argv, &imgdecrypt_cmd, &opts ) ) != 0)
+ return rc;
+
+ /* Parse image name/URI string */
+ image_name_uri = argv[optind];
+
+ /* Parse envelope name/URI string */
+ envelope_name_uri = argv[ optind + 1 ];
+
+ /* Acquire the image */
+ if ( ( rc = imgacquire ( image_name_uri, opts.timeout, &image ) ) != 0 )
+ goto err_acquire_image;
+
+ /* Acquire the envelope image */
+ if ( ( rc = imgacquire ( envelope_name_uri, opts.timeout,
+ &envelope ) ) != 0 )
+ goto err_acquire_envelope;
+
+ /* Decrypt image */
+ if ( ( rc = imgdecrypt ( image, envelope, opts.name ) ) != 0 ) {
+ printf ( "Could not decrypt: %s\n", strerror ( rc ) );
+ goto err_decrypt;
+ }
+
+ /* Success */
+ rc = 0;
+
+ err_decrypt:
+ /* Discard envelope unless --keep was specified */
+ if ( ! opts.keep )
+ unregister_image ( envelope );
+ err_acquire_envelope:
+ err_acquire_image:
+ return rc;
+}
+
+/** Image encryption management commands */
+struct command image_crypt_commands[] __command = {
+ {
+ .name = "imgdecrypt",
+ .exec = imgdecrypt_exec,
+ },
+};
--- /dev/null
+/*
+ * Copyright (C) 2024 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <string.h>
+#include <syslog.h>
+#include <ipxe/image.h>
+#include <ipxe/cms.h>
+#include <ipxe/privkey.h>
+#include <usr/imgcrypt.h>
+
+/** @file
+ *
+ * Image encryption management
+ *
+ */
+
+/**
+ * Decrypt image using downloaded envelope
+ *
+ * @v image Image to decrypt
+ * @v envelope Image containing decryption key
+ * @v name Decrypted image name (or NULL to use default)
+ * @ret rc Return status code
+ */
+int imgdecrypt ( struct image *image, struct image *envelope,
+ const char *name ) {
+ struct cms_message *cms;
+ int rc;
+
+ /* Parse envelope */
+ if ( ( rc = cms_message ( envelope, &cms ) ) != 0 )
+ goto err_parse;
+
+ /* Decrypt image */
+ if ( ( rc = cms_decrypt ( cms, image, name, &private_key ) ) != 0 )
+ goto err_decrypt;
+
+ /* Drop reference to message */
+ cms_put ( cms );
+ cms = NULL;
+
+ /* Record decryption */
+ syslog ( LOG_NOTICE, "Image \"%s\" decrypted OK\n", image->name );
+
+ return 0;
+
+ err_decrypt:
+ cms_put ( cms );
+ err_parse:
+ syslog ( LOG_ERR, "Image \"%s\" decryption failed: %s\n",
+ image->name, strerror ( rc ) );
+ return rc;
+}
projects / thirdparty / ipxe.git / commitdiff
