--- /dev/null
+/*
+ * cros-vbutil - Tool for signing kernels using the Chromium OS verified boot
+ * format, using widely-shared "developer" keys. The output of this tool is
+ * intended to be written to a GPT partition of type "Chrome OS Kernel", such
+ * that a Chromium OS bootloader can find it.
+ *
+ * Much of this is adapted from Google's vboot_reference project found here:
+ * https://chromium.googlesource.com/chromiumos/platform/vboot_reference
+ *
+ * Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+ *
+ * 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.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may 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.
+ *
+ * Rewritten:
+ * Copyright (c) 2021 Brian Norris <computersforpeace@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <openssl/rsa.h>
+#include <openssl/x509.h>
+#include <openssl/sha.h>
+
+#define BLOCK_PAD 65536
+/* Sections are aligned to 4K blocks */
+#define ALIGN 4096
+#define ROUNDUP(x) (((x) + (ALIGN-1)) & ~(ALIGN-1))
+
+/*
+ * Signature size, in bytes. This is an RSA-2048 encryption of a SHA256 hash.
+ */
+#define SIG_SIZE (2048 / 8)
+
+/*
+ * From vboot_reference: tests/devkeys/kernel.keyblock
+ */
+static const unsigned char keyblock[] = {
+ 0x43, 0x48, 0x52, 0x4f, 0x4d, 0x45, 0x4f, 0x53, 0x02, 0x00, 0x00, 0x00,
+ 0x01, 0x00, 0x00, 0x00, 0xb8, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0xa0, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x78, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x48, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x78, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x08, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0xcb, 0x02, 0x40, 0x41,
+ 0x1d, 0x2d, 0x86, 0x0f, 0x6d, 0x53, 0xcc, 0xcc, 0xa7, 0x9b, 0x1b, 0xca,
+ 0xdc, 0x22, 0xc4, 0xc2, 0x3a, 0x72, 0xa5, 0x12, 0x21, 0xfe, 0x78, 0x1d,
+ 0x9c, 0x03, 0x65, 0x0c, 0x94, 0xba, 0x3d, 0x5b, 0x5e, 0x98, 0x16, 0x8a,
+ 0xaf, 0xaf, 0x67, 0x5a, 0x46, 0x88, 0x2c, 0xf0, 0x2a, 0x65, 0xbd, 0xc7,
+ 0x59, 0xcc, 0x70, 0xe9, 0x01, 0x4e, 0x7d, 0x8c, 0x43, 0x2e, 0x1c, 0x6d,
+ 0x72, 0x15, 0xaf, 0xd0, 0x71, 0x9f, 0xb4, 0x3a, 0xe7, 0x44, 0x82, 0xd1,
+ 0x83, 0x8b, 0x9d, 0x6c, 0x64, 0x99, 0xaf, 0xdb, 0x8a, 0xcc, 0xd1, 0xd6,
+ 0x83, 0xa6, 0xa4, 0xea, 0xa9, 0x81, 0x1d, 0x9f, 0x1b, 0x5a, 0x8c, 0xf8,
+ 0xdb, 0x26, 0x21, 0xb2, 0x7b, 0x53, 0x92, 0xf0, 0x6a, 0xc5, 0x8c, 0x11,
+ 0xba, 0x7e, 0x43, 0xcb, 0x1e, 0x57, 0xa1, 0x6e, 0xd5, 0xfe, 0x82, 0x28,
+ 0x3d, 0x6d, 0xbd, 0x97, 0xb0, 0xe8, 0xfb, 0x1f, 0x88, 0x06, 0x1b, 0x0a,
+ 0xc5, 0x8f, 0x96, 0x69, 0x48, 0x69, 0x41, 0x2a, 0x52, 0xd7, 0xb7, 0x33,
+ 0x78, 0x8b, 0x6f, 0x97, 0xa7, 0x7d, 0xdc, 0xd0, 0x2b, 0xd9, 0x81, 0x67,
+ 0xc9, 0x3f, 0xa9, 0xb4, 0x1e, 0x0b, 0x08, 0x54, 0xc6, 0x01, 0xc6, 0x20,
+ 0xe6, 0xc6, 0x09, 0x5f, 0x0a, 0xc5, 0x02, 0x05, 0x6b, 0x40, 0x96, 0x11,
+ 0x20, 0xe5, 0xa2, 0x88, 0x37, 0x6a, 0xd3, 0xda, 0xda, 0xda, 0x76, 0x1c,
+ 0xe4, 0x3d, 0x2c, 0xfe, 0x65, 0x86, 0x98, 0xa2, 0xa8, 0x49, 0x7d, 0x26,
+ 0x45, 0x14, 0x04, 0x10, 0xe3, 0x38, 0x4b, 0x66, 0x9c, 0x5c, 0x2c, 0xe8,
+ 0xd9, 0x06, 0xd4, 0xc3, 0x05, 0x94, 0x1c, 0x7b, 0x23, 0x89, 0x86, 0x1d,
+ 0x32, 0xbb, 0x23, 0x90, 0x2b, 0x72, 0xd7, 0x90, 0x53, 0x52, 0x10, 0x12,
+ 0xd0, 0xc2, 0xe2, 0x72, 0x81, 0x70, 0x3c, 0xb1, 0x27, 0x42, 0xec, 0xbf,
+ 0x2b, 0x54, 0xd6, 0xcb, 0x61, 0xea, 0xb4, 0xd4, 0xa8, 0xde, 0xf3, 0xdf,
+ 0x3d, 0xd1, 0x17, 0xde, 0x86, 0x89, 0xf4, 0xa1, 0x28, 0x5e, 0xda, 0xb4,
+ 0x47, 0x19, 0x9b, 0xc2, 0xce, 0x49, 0xea, 0x63, 0xda, 0x42, 0x1c, 0x85,
+ 0x1c, 0xab, 0x6c, 0xd7, 0xc2, 0xfd, 0x34, 0x1b, 0xd5, 0x11, 0xa2, 0x44,
+ 0xb7, 0x7a, 0x85, 0x61, 0x03, 0xba, 0xd4, 0x64, 0xe1, 0x49, 0x87, 0x92,
+ 0xe6, 0xdc, 0x39, 0x94, 0x9c, 0xba, 0xef, 0x58, 0x9e, 0x0e, 0x36, 0x98,
+ 0xd7, 0xd2, 0x4c, 0x14, 0x71, 0x94, 0x78, 0xaf, 0x86, 0xe7, 0x2f, 0xe9,
+ 0xf9, 0x20, 0x4d, 0xfe, 0xda, 0xd7, 0x3f, 0x89, 0xc1, 0x59, 0xae, 0xbd,
+ 0x60, 0x9b, 0x97, 0xa4, 0x66, 0x00, 0xbb, 0x7b, 0xd0, 0x49, 0x85, 0x6f,
+ 0x7b, 0x01, 0x24, 0xc3, 0x48, 0xe2, 0xc7, 0x61, 0x98, 0x9c, 0xe5, 0x93,
+ 0x87, 0x04, 0x09, 0x3a, 0x92, 0x54, 0x1f, 0xb5, 0x80, 0x29, 0x15, 0xe5,
+ 0x7f, 0xfe, 0xdc, 0xaf, 0xd3, 0xe1, 0x62, 0xc4, 0xb6, 0xdb, 0x2f, 0x1a,
+ 0x08, 0xf3, 0x54, 0x06, 0x3a, 0xce, 0x5e, 0x89, 0x71, 0xdf, 0x3b, 0x5c,
+ 0x8c, 0x6b, 0x83, 0xa9, 0x0c, 0x05, 0x50, 0x7b, 0x84, 0x09, 0x18, 0x66,
+ 0x84, 0xe1, 0x7e, 0x60, 0xd6, 0xdc, 0xbf, 0x1c, 0xac, 0x5c, 0xdc, 0xe6,
+ 0x4c, 0x9e, 0xa0, 0x4a, 0x59, 0x30, 0xff, 0x91, 0x90, 0x1e, 0x21, 0x29,
+ 0x50, 0x99, 0x76, 0xfd, 0x2f, 0x5a, 0x67, 0x6a, 0x00, 0x6b, 0x40, 0x27,
+ 0xe7, 0xbd, 0x17, 0xe6, 0x5f, 0x9e, 0xe4, 0x6b, 0xe0, 0x05, 0x9e, 0x7d,
+ 0xcb, 0x90, 0xe9, 0x3c, 0x9c, 0x79, 0xc9, 0x47, 0xf8, 0x58, 0xbc, 0x3f,
+ 0xb1, 0xa5, 0xef, 0x67, 0xf0, 0x22, 0xa1, 0x70, 0x33, 0x36, 0xb0, 0x5c,
+ 0xed, 0xea, 0x4e, 0xde, 0x24, 0x0c, 0x5b, 0xd8, 0x4d, 0xbe, 0xac, 0x6a,
+ 0x12, 0x31, 0xa6, 0x5e, 0x5f, 0x04, 0xb6, 0x58, 0xa1, 0xd1, 0x29, 0xa3,
+ 0x33, 0x9c, 0x64, 0xb1, 0x8e, 0x3b, 0xfa, 0xaf, 0x35, 0x94, 0x7a, 0xa4,
+ 0xf5, 0xcb, 0x9e, 0x67, 0x1b, 0x8d, 0x35, 0xca, 0x10, 0x69, 0x8d, 0xea,
+ 0x78, 0xc2, 0xf6, 0x63, 0xc0, 0x11, 0xf1, 0xf6, 0x66, 0x70, 0x2e, 0x96,
+ 0xf0, 0xbc, 0x7b, 0x1e, 0x16, 0x26, 0xde, 0xe3, 0x7f, 0xc0, 0xf4, 0x6c,
+ 0x3c, 0x0b, 0x52, 0xe2, 0x07, 0xde, 0x70, 0x8b, 0xaf, 0x84, 0x95, 0x1b,
+ 0x46, 0x95, 0x69, 0x05, 0x92, 0xea, 0x36, 0xa5, 0xca, 0x50, 0xdb, 0x49,
+ 0xc8, 0x44, 0xee, 0x7c, 0x49, 0x40, 0x34, 0x05, 0xf3, 0x06, 0x1f, 0x1c,
+ 0xcc, 0x78, 0x62, 0x1b, 0x9d, 0xe2, 0x4f, 0x3e, 0x04, 0x96, 0xba, 0xd0,
+ 0xc7, 0xa2, 0x3a, 0xaa, 0xf7, 0xc3, 0xae, 0xc0, 0x6b, 0xca, 0xc8, 0x59,
+ 0x90, 0xe0, 0x45, 0x7b, 0x4b, 0x60, 0xbf, 0xae, 0x15, 0x25, 0xd0, 0xa2,
+ 0x2f, 0x95, 0x6a, 0x2e, 0x37, 0x24, 0x15, 0x69, 0x0e, 0x3a, 0x6d, 0x40,
+ 0x21, 0xf6, 0x74, 0x5c, 0xa6, 0x9f, 0xe0, 0x03, 0x60, 0x04, 0x59, 0x70,
+ 0x70, 0xa0, 0x46, 0xf4, 0xdf, 0x0a, 0x4b, 0x14, 0xab, 0x87, 0x0c, 0xaa,
+ 0x64, 0x9b, 0x82, 0xca, 0x21, 0xb0, 0x72, 0xfa, 0x8b, 0x37, 0xf5, 0x60,
+ 0xd7, 0xb7, 0x4e, 0x72, 0x5e, 0x13, 0x23, 0x73, 0x84, 0x6c, 0xd1, 0x8d,
+ 0x72, 0xa2, 0x15, 0x8b, 0x51, 0x38, 0x90, 0x68, 0x90, 0xd9, 0x8b, 0x65,
+ 0x30, 0x61, 0xdb, 0x51, 0x80, 0x58, 0xdd, 0xc3, 0xf0, 0x29, 0x33, 0xdc,
+ 0x39, 0x92, 0xbf, 0x27, 0xe6, 0xc7, 0x82, 0xf6, 0xea, 0xcf, 0x21, 0xd2,
+ 0xa0, 0x38, 0x02, 0x57, 0x52, 0xf5, 0xdd, 0x07, 0x99, 0xe3, 0x09, 0xd7,
+ 0xad, 0x9e, 0x1e, 0xe7, 0xf3, 0x5e, 0x72, 0xa0, 0xc6, 0x9d, 0x41, 0x86,
+ 0x96, 0x82, 0x74, 0x46, 0x1f, 0x05, 0xd2, 0x05, 0x25, 0x29, 0x27, 0x66,
+ 0xe1, 0xab, 0x5c, 0x06, 0xf4, 0xac, 0xe7, 0xd0, 0xf8, 0xe6, 0x5e, 0x8b,
+ 0x19, 0x55, 0xc2, 0x99, 0x8e, 0xa7, 0x2e, 0x66, 0x0c, 0x2a, 0x61, 0xb0,
+ 0x98, 0x41, 0x93, 0x05, 0x54, 0x90, 0xaa, 0xbe, 0x15, 0x26, 0x5b, 0x77,
+ 0x7c, 0xb0, 0xf8, 0x08, 0x68, 0xb6, 0xb8, 0xd4, 0xdd, 0xd8, 0xa8, 0x4f,
+ 0xdd, 0xf6, 0x93, 0xe5, 0xa1, 0x88, 0x1b, 0x7a, 0x05, 0x81, 0xc5, 0x98,
+ 0x34, 0x1d, 0x88, 0x63, 0x55, 0xaf, 0x9a, 0xa1, 0xcb, 0x4b, 0xaf, 0x86,
+ 0xb3, 0x45, 0xda, 0xa4, 0xb4, 0xa5, 0x10, 0x7a, 0x50, 0x6a, 0xe5, 0xda,
+ 0x6f, 0x8f, 0xc0, 0x1d, 0x95, 0xb1, 0x91, 0x48, 0x53, 0xc3, 0xe5, 0x1f,
+ 0x0e, 0x05, 0x75, 0xaa, 0xc7, 0xd8, 0x36, 0xd0, 0x6d, 0x50, 0x48, 0xd4,
+ 0xe6, 0xbd, 0xd0, 0x2d, 0x97, 0x17, 0x2d, 0xb3, 0x46, 0xab, 0x19, 0x0e,
+ 0xe4, 0xac, 0xfd, 0x93, 0xab, 0x0c, 0x4c, 0xad, 0xbf, 0x58, 0x1b, 0xaa,
+ 0x26, 0xcd, 0x0d, 0xda, 0xaf, 0xcb, 0xeb, 0xb0, 0x19, 0x5c, 0x46, 0x1f,
+ 0x9b, 0xb0, 0xb8, 0x12, 0x6c, 0xa7, 0x4e, 0xb8, 0xa7, 0x1f, 0x12, 0x6b,
+ 0xf8, 0xbe, 0x4b, 0xa9, 0x04, 0xb4, 0xf9, 0x36, 0xcc, 0xd9, 0xd5, 0x91,
+ 0xac, 0x7e, 0xe9, 0x13, 0xc0, 0x7f, 0xca, 0xd7, 0xdc, 0xbe, 0xa9, 0xb0,
+ 0xd6, 0x28, 0x17, 0x2f, 0xd6, 0xdf, 0x0e, 0x6b, 0x48, 0x11, 0xd6, 0x51,
+ 0xc7, 0x6d, 0x87, 0xf6, 0x08, 0xb7, 0x6c, 0x69, 0xf7, 0xd6, 0x28, 0x50,
+ 0x7e, 0x74, 0xad, 0x96, 0x6a, 0x0c, 0xca, 0x6b, 0xb1, 0xf1, 0xde, 0xa3,
+ 0x5f, 0x23, 0xf5, 0x2a, 0x44, 0x11, 0x0f, 0xa3, 0xf7, 0x24, 0x36, 0x1b,
+ 0x33, 0xe6, 0x7e, 0xd9, 0x0e, 0xa5, 0x8b, 0xa0, 0xb8, 0x8b, 0x85, 0xee,
+ 0xd0, 0xe4, 0x69, 0x43, 0xc6, 0xf9, 0x5f, 0x27, 0xa5, 0xc9, 0x61, 0x3b,
+ 0x8e, 0xaf, 0x62, 0x77, 0x42, 0xb6, 0x27, 0x5f, 0xed, 0x96, 0x86, 0xb3,
+ 0xef, 0x32, 0x31, 0x43, 0x2e, 0x7b, 0xaf, 0x5b, 0xe2, 0x75, 0x82, 0x72,
+ 0xad, 0x3b, 0x5d, 0x92, 0xc1, 0x15, 0xaa, 0xfb, 0x21, 0x07, 0xe9, 0xaa,
+ 0xc4, 0xe2, 0xd7, 0x99, 0x83, 0x6c, 0x72, 0x39, 0x6f, 0x35, 0x20, 0x9d,
+ 0xe0, 0xd8, 0xf8, 0xdb, 0x72, 0x24, 0xe5, 0x8d, 0x29, 0xfd, 0x24, 0x7b,
+ 0xbc, 0x48, 0xe9, 0xbb, 0xc2, 0x84, 0xc7, 0xb9
+};
+static unsigned int keyblock_len = sizeof(keyblock);
+
+/*
+ * RSA 2048-bit key from vboot_reference:
+ * tests/devkeys/kernel_data_key.vbprivk, minus the 8-byte custom header.
+ */
+static const unsigned char privk[] = {
+ 0x30, 0x82, 0x04, 0xa3, 0x02, 0x01, 0x00, 0x02, 0x82, 0x01, 0x01, 0x00,
+ 0xcb, 0xd6, 0x54, 0x2b, 0xbf, 0xec, 0x42, 0x27, 0xb1, 0x3c, 0x70, 0x81,
+ 0x72, 0xe2, 0xc2, 0xd0, 0x12, 0x10, 0x52, 0x53, 0x90, 0xd7, 0x72, 0x2b,
+ 0x90, 0x23, 0xbb, 0x32, 0x1d, 0x86, 0x89, 0x23, 0x7b, 0x1c, 0x94, 0x05,
+ 0xc3, 0xd4, 0x06, 0xd9, 0xe8, 0x2c, 0x5c, 0x9c, 0x66, 0x4b, 0x38, 0xe3,
+ 0x10, 0x04, 0x14, 0x45, 0x26, 0x7d, 0x49, 0xa8, 0xa2, 0x98, 0x86, 0x65,
+ 0xfe, 0x2c, 0x3d, 0xe4, 0x1c, 0x76, 0xda, 0xda, 0xda, 0xd3, 0x6a, 0x37,
+ 0x88, 0xa2, 0xe5, 0x20, 0x11, 0x96, 0x40, 0x6b, 0x05, 0x02, 0xc5, 0x0a,
+ 0x5f, 0x09, 0xc6, 0xe6, 0x20, 0xc6, 0x01, 0xc6, 0x54, 0x08, 0x0b, 0x1e,
+ 0xb4, 0xa9, 0x3f, 0xc9, 0x67, 0x81, 0xd9, 0x2b, 0xd0, 0xdc, 0x7d, 0xa7,
+ 0x97, 0x6f, 0x8b, 0x78, 0x33, 0xb7, 0xd7, 0x52, 0x2a, 0x41, 0x69, 0x48,
+ 0x69, 0x96, 0x8f, 0xc5, 0x0a, 0x1b, 0x06, 0x88, 0x1f, 0xfb, 0xe8, 0xb0,
+ 0x97, 0xbd, 0x6d, 0x3d, 0x28, 0x82, 0xfe, 0xd5, 0x6e, 0xa1, 0x57, 0x1e,
+ 0xcb, 0x43, 0x7e, 0xba, 0x11, 0x8c, 0xc5, 0x6a, 0xf0, 0x92, 0x53, 0x7b,
+ 0xb2, 0x21, 0x26, 0xdb, 0xf8, 0x8c, 0x5a, 0x1b, 0x9f, 0x1d, 0x81, 0xa9,
+ 0xea, 0xa4, 0xa6, 0x83, 0xd6, 0xd1, 0xcc, 0x8a, 0xdb, 0xaf, 0x99, 0x64,
+ 0x6c, 0x9d, 0x8b, 0x83, 0xd1, 0x82, 0x44, 0xe7, 0x3a, 0xb4, 0x9f, 0x71,
+ 0xd0, 0xaf, 0x15, 0x72, 0x6d, 0x1c, 0x2e, 0x43, 0x8c, 0x7d, 0x4e, 0x01,
+ 0xe9, 0x70, 0xcc, 0x59, 0xc7, 0xbd, 0x65, 0x2a, 0xf0, 0x2c, 0x88, 0x46,
+ 0x5a, 0x67, 0xaf, 0xaf, 0x8a, 0x16, 0x98, 0x5e, 0x5b, 0x3d, 0xba, 0x94,
+ 0x0c, 0x65, 0x03, 0x9c, 0x1d, 0x78, 0xfe, 0x21, 0x12, 0xa5, 0x72, 0x3a,
+ 0xc2, 0xc4, 0x22, 0xdc, 0xca, 0x1b, 0x9b, 0xa7, 0xcc, 0xcc, 0x53, 0x6d,
+ 0x0f, 0x86, 0x2d, 0x1d, 0x02, 0x03, 0x01, 0x00, 0x01, 0x02, 0x82, 0x01,
+ 0x00, 0x4d, 0xb8, 0xea, 0x9d, 0x47, 0xef, 0xf1, 0x05, 0xab, 0x79, 0xed,
+ 0x38, 0x1e, 0xb3, 0x42, 0x2f, 0x0e, 0x44, 0x34, 0xef, 0xf2, 0x31, 0x84,
+ 0x32, 0x02, 0x22, 0xed, 0xb4, 0xdd, 0x37, 0x38, 0x41, 0x54, 0x27, 0x00,
+ 0x75, 0xf6, 0x46, 0x79, 0x5a, 0x4b, 0x41, 0xe7, 0x0a, 0x27, 0xa3, 0x15,
+ 0x0c, 0xd7, 0x45, 0x86, 0xe9, 0x1b, 0x14, 0xf8, 0xaa, 0x19, 0x5d, 0x69,
+ 0x19, 0xa8, 0xc1, 0xfb, 0xd3, 0x67, 0xdb, 0x15, 0xf6, 0x0f, 0x2c, 0x3f,
+ 0xba, 0xef, 0x19, 0x95, 0x9e, 0x15, 0xb6, 0xa1, 0xd7, 0x6c, 0xb0, 0xb2,
+ 0xab, 0x12, 0xb3, 0xea, 0xa8, 0x42, 0xe4, 0xdd, 0x36, 0x5f, 0x42, 0x35,
+ 0xe3, 0x3e, 0x65, 0xae, 0x91, 0xc0, 0x2a, 0xed, 0xc0, 0xdc, 0x41, 0xc6,
+ 0x93, 0xc9, 0x95, 0x59, 0xab, 0xba, 0xa4, 0xa5, 0xb0, 0x89, 0xb6, 0x29,
+ 0x4b, 0xd8, 0x1e, 0xf5, 0xb0, 0xde, 0xfa, 0x91, 0x11, 0x55, 0xd6, 0x9d,
+ 0xe1, 0xa7, 0x9c, 0xf2, 0xf4, 0x9d, 0x7f, 0x96, 0x49, 0x7a, 0xab, 0xe9,
+ 0x9a, 0x0c, 0xcb, 0x10, 0x5c, 0x67, 0xf0, 0x1d, 0xf3, 0x33, 0x84, 0xae,
+ 0x6e, 0xe4, 0xbb, 0xa7, 0x57, 0x98, 0x99, 0x2b, 0xf3, 0x1d, 0xab, 0xec,
+ 0x01, 0xa2, 0x2e, 0x3c, 0x10, 0x5c, 0xff, 0xe8, 0xcc, 0x50, 0x45, 0x21,
+ 0x2f, 0x04, 0x69, 0xdd, 0x02, 0x5b, 0x10, 0xd6, 0x54, 0x36, 0x4c, 0x73,
+ 0x0c, 0x1e, 0xc1, 0xff, 0xac, 0x60, 0x5d, 0xbc, 0x13, 0x84, 0xe8, 0xa4,
+ 0xbd, 0x66, 0xca, 0xca, 0xaf, 0x55, 0x8a, 0xf8, 0x87, 0x17, 0x93, 0xbf,
+ 0x66, 0xa4, 0x97, 0xe9, 0x47, 0x81, 0x03, 0xfa, 0x4c, 0x32, 0xf6, 0xec,
+ 0x7a, 0x03, 0xbb, 0x2d, 0x3b, 0x9b, 0xea, 0xdc, 0x6c, 0x61, 0x7f, 0x05,
+ 0xc8, 0x2d, 0x50, 0x89, 0xe9, 0x10, 0x3d, 0x3c, 0x02, 0xb0, 0x5d, 0x3e,
+ 0x25, 0x71, 0xd2, 0xa1, 0xe1, 0x02, 0x81, 0x81, 0x00, 0xf6, 0x3c, 0x7f,
+ 0x15, 0x63, 0x04, 0x0a, 0xd4, 0x68, 0xe8, 0xd9, 0x4b, 0x7f, 0xbc, 0xca,
+ 0xb5, 0x84, 0x01, 0x71, 0x11, 0x33, 0x4d, 0xe1, 0x0a, 0xe8, 0xa7, 0x95,
+ 0xcc, 0x23, 0x59, 0x19, 0xb5, 0x82, 0xaa, 0xae, 0xe4, 0x90, 0x33, 0x95,
+ 0x20, 0x1a, 0xfd, 0xef, 0x8e, 0x36, 0xc1, 0x57, 0xde, 0x94, 0xdd, 0x99,
+ 0x6f, 0x14, 0x0c, 0x8e, 0x30, 0xe0, 0xe7, 0x64, 0x33, 0xa7, 0x1d, 0xfd,
+ 0x99, 0xdc, 0x58, 0x49, 0x4e, 0x56, 0x82, 0x43, 0xea, 0xd9, 0xf7, 0xcc,
+ 0x1a, 0xf5, 0x09, 0x38, 0x4c, 0xf6, 0x87, 0x8f, 0xa6, 0x40, 0x96, 0xd1,
+ 0x81, 0x62, 0xbb, 0x49, 0x53, 0x69, 0x56, 0xdf, 0x4a, 0x85, 0xfd, 0x72,
+ 0x34, 0x21, 0x56, 0xa3, 0x7b, 0xda, 0x50, 0x24, 0x88, 0xc6, 0x0b, 0x03,
+ 0x94, 0x0d, 0xe2, 0x03, 0x2a, 0x3c, 0x5a, 0xdd, 0x73, 0xe7, 0x07, 0x01,
+ 0x7d, 0xdd, 0x38, 0x81, 0x19, 0x02, 0x81, 0x81, 0x00, 0xd3, 0xeb, 0x72,
+ 0x3f, 0xf6, 0x9b, 0x03, 0x8c, 0xab, 0xd9, 0x41, 0x47, 0xbe, 0x6c, 0x07,
+ 0x7f, 0xd7, 0xcb, 0xee, 0xbf, 0x45, 0x13, 0x1e, 0x53, 0x35, 0xd2, 0xe4,
+ 0x6a, 0x13, 0xe9, 0xd8, 0xe3, 0xf4, 0x28, 0x5e, 0xeb, 0xd8, 0xd2, 0x87,
+ 0x60, 0xdc, 0xa7, 0x21, 0xd8, 0x33, 0xce, 0xca, 0x60, 0x50, 0x1b, 0x87,
+ 0xbf, 0x71, 0x88, 0x90, 0x71, 0x6f, 0xde, 0xdb, 0x33, 0x1d, 0x3c, 0xb1,
+ 0x2f, 0x1b, 0x41, 0xb8, 0x55, 0xa1, 0x5c, 0xa8, 0xb2, 0x73, 0x1b, 0x39,
+ 0x69, 0x5c, 0xa1, 0x57, 0x9b, 0x2e, 0xcd, 0x0d, 0x71, 0x42, 0xdf, 0x2a,
+ 0xd3, 0x4f, 0x51, 0xdc, 0x35, 0x5c, 0x14, 0x86, 0x16, 0xb8, 0x22, 0x8c,
+ 0x73, 0x37, 0x7a, 0x6c, 0xb7, 0xfe, 0x01, 0x1b, 0xa8, 0xc5, 0xf1, 0xff,
+ 0xda, 0xd4, 0x63, 0x58, 0x81, 0xe1, 0x6a, 0xaf, 0xc2, 0x3d, 0xbb, 0x17,
+ 0x3f, 0x2c, 0xf9, 0xb8, 0xa5, 0x02, 0x81, 0x81, 0x00, 0xd1, 0x1e, 0x6b,
+ 0xa7, 0x54, 0x22, 0x18, 0xb8, 0x70, 0x28, 0x60, 0x72, 0x98, 0x17, 0x53,
+ 0xe8, 0x78, 0x25, 0x69, 0x4a, 0xfc, 0x51, 0x45, 0xb0, 0x28, 0x0a, 0x3b,
+ 0x53, 0xd5, 0x29, 0x54, 0x86, 0x2c, 0x64, 0x9c, 0x87, 0x8c, 0x57, 0xe2,
+ 0x6c, 0x13, 0xc0, 0x59, 0x74, 0x63, 0xd8, 0x2b, 0xb1, 0xe2, 0xa7, 0x98,
+ 0x29, 0x17, 0xd3, 0xd9, 0xe6, 0x74, 0xfa, 0xce, 0xc4, 0x77, 0x47, 0x27,
+ 0x1b, 0x46, 0x60, 0xcc, 0x50, 0xf5, 0x73, 0x48, 0x0e, 0xe9, 0xf2, 0x62,
+ 0xaa, 0xfa, 0x33, 0x4c, 0x57, 0x40, 0x7f, 0xbc, 0x65, 0xab, 0x30, 0xea,
+ 0xd8, 0x81, 0x6b, 0x21, 0x48, 0xef, 0x8b, 0x51, 0xb3, 0x4e, 0xbc, 0x02,
+ 0x03, 0x77, 0xd4, 0xc6, 0x9e, 0xe6, 0xb7, 0x6d, 0x6f, 0xa3, 0x11, 0xb3,
+ 0x86, 0x47, 0x8c, 0x0c, 0xb8, 0x0f, 0xed, 0xf3, 0x68, 0xfd, 0x69, 0x9b,
+ 0xc0, 0xb2, 0xe1, 0xcb, 0xf1, 0x02, 0x81, 0x80, 0x46, 0xc6, 0xdb, 0xe1,
+ 0x80, 0xfb, 0x44, 0xb4, 0x36, 0xb0, 0xd8, 0x9c, 0x9d, 0x7c, 0x77, 0x04,
+ 0xbb, 0x8d, 0xe0, 0xaf, 0x00, 0xe2, 0xe1, 0xbd, 0xe8, 0xbc, 0x06, 0x8d,
+ 0x67, 0x19, 0x32, 0xd6, 0xef, 0x34, 0x8c, 0x7f, 0x38, 0x6b, 0x17, 0xcb,
+ 0xc1, 0xe6, 0x0f, 0xe7, 0xa5, 0x65, 0xeb, 0x31, 0x3f, 0x8f, 0xf2, 0x46,
+ 0x7e, 0x24, 0x9e, 0x19, 0x44, 0xc3, 0xa9, 0x71, 0xe8, 0xd1, 0xdc, 0x5b,
+ 0x5f, 0x3f, 0x13, 0xd1, 0x85, 0x92, 0xec, 0xc4, 0xac, 0xac, 0xea, 0xff,
+ 0xc5, 0x70, 0x1d, 0x52, 0x36, 0xcf, 0x45, 0x2e, 0x0e, 0xa7, 0x7a, 0x26,
+ 0x18, 0xd7, 0xbe, 0x34, 0x14, 0x0c, 0xc6, 0xbb, 0xcf, 0xc3, 0xba, 0x24,
+ 0xc0, 0xe2, 0xa2, 0x6c, 0xd0, 0xe8, 0x8d, 0xd4, 0x50, 0x48, 0x02, 0xab,
+ 0x93, 0x43, 0x9a, 0xcb, 0xc5, 0xfd, 0x5b, 0xb6, 0x03, 0xe7, 0xf8, 0x5b,
+ 0xa1, 0x29, 0xc6, 0x01, 0x02, 0x81, 0x80, 0x0e, 0x18, 0xbc, 0x00, 0xa3,
+ 0x81, 0xda, 0xc2, 0xc8, 0xfb, 0x0a, 0xbd, 0x7f, 0xb7, 0x7f, 0xa1, 0x18,
+ 0x7f, 0x49, 0xb8, 0x32, 0x83, 0x4b, 0x71, 0x35, 0x59, 0x51, 0x7b, 0xee,
+ 0x8e, 0x4e, 0xd2, 0x42, 0xa8, 0x6c, 0x82, 0x57, 0xf7, 0x34, 0xf6, 0x82,
+ 0x59, 0xe9, 0x75, 0x7a, 0x8f, 0x0a, 0x8d, 0x46, 0x1e, 0xa1, 0x77, 0xa1,
+ 0x4c, 0xb3, 0x9e, 0x86, 0x93, 0x18, 0xdf, 0x3e, 0xfb, 0x81, 0xd0, 0xbc,
+ 0x65, 0xa2, 0xb3, 0x80, 0xf0, 0x8f, 0x73, 0x2f, 0xb5, 0xc4, 0xc0, 0x03,
+ 0xac, 0x24, 0xfa, 0x4f, 0x05, 0xe3, 0x16, 0x29, 0x7c, 0xff, 0x63, 0xd5,
+ 0x0a, 0x0a, 0xbd, 0xd7, 0x65, 0x3a, 0xb5, 0x5e, 0xe7, 0x23, 0xfc, 0x3d,
+ 0x08, 0xea, 0x62, 0xc2, 0xe3, 0x4a, 0xbb, 0x86, 0x5a, 0xc5, 0x93, 0xd7,
+ 0xbc, 0xb4, 0x4c, 0xcf, 0xcf, 0x78, 0x9f, 0x52, 0x6e, 0xa1, 0x49, 0x21,
+ 0xf7, 0x20, 0x42
+};
+static const unsigned int privk_len = sizeof(privk);
+
+/* Signature data (a secure hash, possibly signed) */
+struct vb2_signature {
+ /* Offset of signature data from start of this struct */
+ uint32_t sig_offset;
+ uint32_t reserved0;
+
+ /* Size of signature data in bytes */
+ uint32_t sig_size;
+ uint32_t reserved1;
+
+ /* Size of the data block which was signed in bytes */
+ uint32_t data_size;
+ uint32_t reserved2;
+} __attribute__((packed));
+
+/*
+ * Preamble block for kernel, version 2.2
+ *
+ * This should be followed by:
+ * 1) The signature data for the kernel body, pointed to by
+ * body_signature.sig_offset.
+ * 2) The signature data for (vb2_kernel_preamble + body signature data),
+ * pointed to by preamble_signature.sig_offset.
+ * 3) The 16-bit vmlinuz header, which is used for reconstruction of
+ * vmlinuz image.
+ */
+struct vb2_kernel_preamble {
+ /*
+ * Size of this preamble, including keys, signatures, vmlinuz header,
+ * and padding, in bytes
+ */
+ uint32_t preamble_size;
+ uint32_t reserved0;
+
+ /* Signature for this preamble (header + body signature) */
+ struct vb2_signature preamble_signature;
+
+ /* Version of this header format */
+ uint32_t header_version_major;
+ uint32_t header_version_minor;
+
+ /* Kernel version */
+ uint32_t kernel_version;
+ uint32_t reserved1;
+
+ /* Load address for kernel body */
+ uint64_t body_load_address;
+
+ /* Address of bootloader, after body is loaded at body_load_address */
+ uint64_t bootloader_address;
+
+ /* Size of bootloader in bytes */
+ uint32_t bootloader_size;
+ uint32_t reserved2;
+
+ /* Signature for the kernel body */
+ struct vb2_signature body_signature;
+
+ /* Address of 16-bit header for vmlinuz reassembly. */
+ uint64_t vmlinuz_header_address;
+
+ /* Size of 16-bit header for vmlinuz in bytes. */
+ uint32_t vmlinuz_header_size;
+ uint32_t reserved3;
+
+ uint32_t flags;
+} __attribute__((packed));
+
+/*
+ * Order matters. |data| may overlap with |siginfo|, so we need to fill out
+ * |siginfo| before computing the signature.
+ */
+static int sign(const void *data, size_t len, struct vb2_signature *siginfo,
+ void *sigout)
+{
+ unsigned char hash[SHA256_DIGEST_LENGTH];
+ SHA256_CTX sha256;
+ int ret;
+
+ memset(siginfo, 0, sizeof(*siginfo));
+ siginfo->sig_offset = (uintptr_t)(void *)sigout - (uintptr_t)(void *)siginfo;
+ siginfo->sig_size = SIG_SIZE;
+ siginfo->data_size = len;
+
+ const unsigned char *p = privk;
+ char digest_info[] = {
+ 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01,
+ 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20,
+ };
+
+ uint8_t digest[sizeof(digest_info) + sizeof(hash)];
+
+ SHA256_Init(&sha256);
+ SHA256_Update(&sha256, data, len);
+ SHA256_Final(hash, &sha256);
+
+ memcpy(digest, digest_info, sizeof(digest_info));
+ memcpy(digest + sizeof(digest_info), hash, sizeof(hash));
+
+ RSA *key = d2i_RSAPrivateKey(0, &p, privk_len);
+ if (!key) {
+ fprintf(stderr, "Failed d2i_RSAPrivateKey()\n");
+ return -1;
+ }
+
+ ret = RSA_private_encrypt(sizeof(digest), digest, sigout, key,
+ RSA_PKCS1_PADDING);
+ if (ret == -1) {
+ fprintf(stderr, "%s: RSA_private_encrypt() failed\n", __func__);
+ return -1;
+ }
+
+ return 0;
+}
+
+static struct vb2_kernel_preamble *
+generate_preamble(const void *kblob, size_t kblob_len,
+ size_t kernel_len, size_t config_len)
+{
+ struct vb2_kernel_preamble *h;
+ uint32_t signed_size = sizeof(struct vb2_kernel_preamble) + SIG_SIZE;
+ uint32_t block_size = signed_size + SIG_SIZE;
+ int ret;
+
+ if (block_size + keyblock_len < BLOCK_PAD)
+ block_size = BLOCK_PAD - keyblock_len;
+ h = (struct vb2_kernel_preamble *)calloc(block_size, 1);
+ if (!h) {
+ perror("calloc");
+ return NULL;
+ }
+
+ /* Sign the body, place the signature in the preamble */
+ ret = sign(kblob, kblob_len, &h->body_signature, h + 1);
+ if (ret) {
+ fprintf(stderr, "sign() failed: %d\n", ret);
+ return NULL;
+ }
+
+ h->header_version_major = 2;
+ h->header_version_minor = 2;
+ h->preamble_size = block_size;
+ h->kernel_version = 1;
+ h->body_load_address = 0x100000;
+ /*
+ * "Bootloder" area (currently empty) is after kernel + config +
+ * parameter page.
+ */
+ h->bootloader_address = h->body_load_address +
+ ROUNDUP(kernel_len) +
+ ROUNDUP(config_len) +
+ ALIGN;
+ h->bootloader_size = 0x1000;
+ h->vmlinuz_header_address = 0;
+ h->vmlinuz_header_size = 0;
+ h->flags = 0;
+
+ ret = sign(h, signed_size, &h->preamble_signature,
+ (void *)(h + 1) + SIG_SIZE);
+ if (ret) {
+ fprintf(stderr, "failed to sign preamble: %d\n", ret);
+ return NULL;
+ }
+ return h;
+}
+
+
+/*
+ * Distilled from vboot_reference futility/cmd_vbutil_kernel.c pack command.
+ *
+ * NB: "config" is the kernel cmdline
+ */
+static int vbutil_pack(const char *kernel, size_t kernel_len,
+ const char *config, size_t config_len,
+ void **out, size_t *out_len)
+{
+ size_t kblob_len = ROUNDUP(kernel_len) + ROUNDUP(config_len) + ALIGN + ALIGN;
+ void *kblob = malloc(kblob_len);
+ if (!kblob) {
+ perror("malloc");
+ return -1;
+ }
+ void *kp = kblob;
+ memset(kblob, 0, kblob_len);
+
+ /* Kernel */
+ memcpy(kp, kernel, kernel_len);
+ kp += ROUNDUP(kernel_len);
+
+ /* Kernel command line */
+ memcpy(kp, config, config_len);
+ kp += ROUNDUP(config_len);
+
+ /* "Parameters" -- empty, 4K-aligned */
+ /* "Bootloader" region -- empty, 4K-aligned */
+ /* Vmlinuz header -- only for x86 (not currently supported), empty */
+
+ struct vb2_kernel_preamble *h;
+ h = generate_preamble(kblob, kblob_len, kernel_len, config_len);
+ if (!h) {
+ fprintf(stderr, "Failed to generate preamble\n");
+ return -1;
+ }
+ size_t outlen = sizeof(keyblock) + h->preamble_size + kblob_len;
+ void *outbuf = malloc(outlen);
+ if (!outbuf)
+ return -1;
+
+ void *p = outbuf;
+ memcpy(p, keyblock, sizeof(keyblock));
+ p += sizeof(keyblock);
+
+ memcpy(p, h, h->preamble_size);
+ p += h->preamble_size;
+
+ memcpy(p, kblob, kblob_len);
+ p += kblob_len;
+
+ if (outbuf) {
+ *out = outbuf;
+ *out_len = outlen;
+ }
+
+ return 0;
+}
+
+static void * read_file(const char *path, size_t *out_len)
+{
+ struct stat st;
+ int fd = open(path, O_RDONLY);
+ if (fd == -1) {
+ perror("failed to open");
+ return NULL;
+ }
+
+ if (fstat(fd, &st) < 0) {
+ perror("fstat");
+ return NULL;
+ }
+
+ size_t len = st.st_size;
+ void *p = malloc(len);
+ if (!p)
+ return NULL;
+
+ size_t count = 0;
+ while (count < len) {
+ ssize_t ret = read(fd, p + count, len - count);
+ if (ret < 0) {
+ perror("read");
+ return NULL;
+ }
+ count += ret;
+ }
+
+ close(fd);
+
+ *out_len = len;
+ return p;
+}
+
+int main(int argc, char * const argv[])
+{
+ int ret;
+ const char *kernel_file = NULL;
+ const char *out_file = NULL;
+ const char *cmdline = NULL;
+ size_t cmdline_len;
+ void *kernel;
+ size_t kernel_len;
+ void *out;
+ size_t out_len;
+
+ int opt;
+ while ((opt = getopt(argc, argv, "k:c:o:")) != -1) {
+ switch (opt) {
+ case 'k':
+ kernel_file = optarg;
+ break;
+ case 'c':
+ cmdline = optarg;
+ break;
+ case 'o':
+ out_file = optarg;
+ break;
+ default:
+ fprintf(stderr, "Usage [-k <kernel>] [-c <command line>] -o <outfile>\n");
+ return -1;
+ }
+ }
+ if (optind < argc) {
+ fprintf(stderr, "Unexpected args?\n");
+ return -1;
+ }
+ if (!out_file || !cmdline || !kernel_file) {
+ fprintf(stderr, "Missing required argument\n");
+ return -1;
+ }
+
+ /* Include the \0 terminator */
+ cmdline_len = strlen(cmdline) + 1;
+
+ kernel = read_file(kernel_file, &kernel_len);
+ if (!kernel) {
+ fprintf(stderr, "failed to read kernel file: %s\n", kernel_file);
+ return -1;
+ }
+
+ ret = vbutil_pack(kernel, kernel_len, cmdline, cmdline_len, &out, &out_len);
+ if (ret)
+ return ret;
+
+ int fd = open(out_file, O_RDWR|O_CREAT, 0644);
+ if (fd == -1) {
+ perror("open");
+ return -1;
+ }
+
+ ret = write(fd, out, out_len);
+ if (ret == -1) {
+ perror("write");
+ return -1;
+ }
+ close(fd);
+
+ return 0;
+}
projects / project / firmware-utils.git / commitdiff