| /* |
| * Copyright 2014 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <getopt.h> |
| #include <inttypes.h> |
| #include <limits.h> |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include "bmpblk_header.h" |
| #include "file_type.h" |
| #include "fmap.h" |
| #include "futility.h" |
| #include "gbb_header.h" |
| #include "host_common.h" |
| #include "kernel_blob.h" |
| #include "traversal.h" |
| #include "util_misc.h" |
| #include "vb1_helper.h" |
| #include "vboot_common.h" |
| |
| /* Local values for cb_area_s._flags */ |
| enum callback_flags { |
| AREA_IS_VALID = 0x00000001, |
| }; |
| |
| /* Local structure for args, etc. */ |
| static struct local_data_s { |
| VbPrivateKey *signprivate; |
| VbKeyBlockHeader *keyblock; |
| VbPublicKey *kernel_subkey; |
| VbPrivateKey *devsignprivate; |
| VbKeyBlockHeader *devkeyblock; |
| uint32_t version; |
| int version_specified; |
| uint32_t flags; |
| int flags_specified; |
| char *loemdir; |
| char *loemid; |
| uint8_t *bootloader_data; |
| uint64_t bootloader_size; |
| uint8_t *config_data; |
| uint64_t config_size; |
| enum arch_t arch; |
| int fv_specified; |
| uint32_t kloadaddr; |
| uint32_t padding; |
| int vblockonly; |
| char *outfile; |
| int create_new_outfile; |
| char *pem_signpriv; |
| int pem_algo_specified; |
| uint32_t pem_algo; |
| char *pem_external; |
| } option = { |
| .version = 1, |
| .arch = ARCH_UNSPECIFIED, |
| .kloadaddr = CROS_32BIT_ENTRY_ADDR, |
| .padding = 65536, |
| }; |
| |
| |
| /* Helper to complain about invalid args. Returns num errors discovered */ |
| static int no_opt_if(int expr, const char *optname) |
| { |
| if (expr) { |
| fprintf(stderr, "Missing --%s option\n", optname); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* This wraps/signs a public key, producing a keyblock. */ |
| int futil_cb_sign_pubkey(struct futil_traverse_state_s *state) |
| { |
| VbPublicKey *data_key = (VbPublicKey *)state->my_area->buf; |
| VbKeyBlockHeader *vblock; |
| |
| if (option.pem_signpriv) { |
| if (option.pem_external) { |
| /* External signing uses the PEM file directly. */ |
| vblock = KeyBlockCreate_external( |
| data_key, |
| option.pem_signpriv, |
| option.pem_algo, option.flags, |
| option.pem_external); |
| } else { |
| option.signprivate = PrivateKeyReadPem( |
| option.pem_signpriv, option.pem_algo); |
| if (!option.signprivate) { |
| fprintf(stderr, |
| "Unable to read PEM signing key: %s\n", |
| strerror(errno)); |
| return 1; |
| } |
| vblock = KeyBlockCreate(data_key, option.signprivate, |
| option.flags); |
| } |
| } else { |
| /* Not PEM. Should already have a signing key. */ |
| vblock = KeyBlockCreate(data_key, option.signprivate, |
| option.flags); |
| } |
| |
| /* Write it out */ |
| return WriteSomeParts(option.outfile, |
| vblock, vblock->key_block_size, |
| NULL, 0); |
| } |
| |
| /* |
| * This handles FW_MAIN_A and FW_MAIN_B while processing a BIOS image. |
| * The data in state->my_area is just the RW firmware blob, so there's nothing |
| * useful to show about it. We'll just mark it as present so when we encounter |
| * corresponding VBLOCK area, we'll have this to verify. |
| */ |
| int futil_cb_sign_fw_main(struct futil_traverse_state_s *state) |
| { |
| state->my_area->_flags |= AREA_IS_VALID; |
| return 0; |
| } |
| |
| /* |
| * This handles VBLOCK_A and VBLOCK_B while processing a BIOS image. |
| * We don't do any signing here. We just check to see if the VBLOCK |
| * area contains a firmware preamble. |
| */ |
| int futil_cb_sign_fw_vblock(struct futil_traverse_state_s *state) |
| { |
| VbKeyBlockHeader *key_block = (VbKeyBlockHeader *)state->my_area->buf; |
| uint32_t len = state->my_area->len; |
| |
| /* |
| * If we have a valid keyblock and fw_preamble, then we can use them to |
| * determine the size of the firmware body. Otherwise, we'll have to |
| * just sign the whole region. |
| */ |
| if (VBOOT_SUCCESS != KeyBlockVerify(key_block, len, NULL, 1)) { |
| fprintf(stderr, "Warning: %s keyblock is invalid. " |
| "Signing the entire FW FMAP region...\n", |
| state->name); |
| goto whatever; |
| } |
| |
| RSAPublicKey *rsa = PublicKeyToRSA(&key_block->data_key); |
| if (!rsa) { |
| fprintf(stderr, "Warning: %s public key is invalid. " |
| "Signing the entire FW FMAP region...\n", |
| state->name); |
| goto whatever; |
| } |
| uint32_t more = key_block->key_block_size; |
| VbFirmwarePreambleHeader *preamble = |
| (VbFirmwarePreambleHeader *)(state->my_area->buf + more); |
| uint32_t fw_size = preamble->body_signature.data_size; |
| struct cb_area_s *fw_body_area = 0; |
| |
| switch (state->component) { |
| case CB_FMAP_VBLOCK_A: |
| fw_body_area = &state->cb_area[CB_FMAP_FW_MAIN_A]; |
| /* Preserve the flags if they're not specified */ |
| if (!option.flags_specified) |
| option.flags = preamble->flags; |
| break; |
| case CB_FMAP_VBLOCK_B: |
| fw_body_area = &state->cb_area[CB_FMAP_FW_MAIN_B]; |
| break; |
| default: |
| DIE; |
| } |
| |
| if (fw_size > fw_body_area->len) { |
| fprintf(stderr, |
| "%s says the firmware is larger than we have\n", |
| state->name); |
| return 1; |
| } |
| |
| /* Update the firmware size */ |
| fw_body_area->len = fw_size; |
| |
| whatever: |
| state->my_area->_flags |= AREA_IS_VALID; |
| |
| return 0; |
| } |
| |
| int futil_cb_create_kernel_part(struct futil_traverse_state_s *state) |
| { |
| uint8_t *vmlinuz_data, *kblob_data, *vblock_data; |
| uint64_t vmlinuz_size, kblob_size, vblock_size; |
| int rv; |
| |
| vmlinuz_data = state->my_area->buf; |
| vmlinuz_size = state->my_area->len; |
| |
| kblob_data = CreateKernelBlob( |
| vmlinuz_data, vmlinuz_size, |
| option.arch, option.kloadaddr, |
| option.config_data, option.config_size, |
| option.bootloader_data, option.bootloader_size, |
| &kblob_size); |
| if (!kblob_data) { |
| fprintf(stderr, "Unable to create kernel blob\n"); |
| return 1; |
| } |
| Debug("kblob_size = 0x%" PRIx64 "\n", kblob_size); |
| |
| vblock_data = SignKernelBlob(kblob_data, kblob_size, option.padding, |
| option.version, option.kloadaddr, |
| option.keyblock, option.signprivate, |
| option.flags, &vblock_size); |
| if (!vblock_data) { |
| fprintf(stderr, "Unable to sign kernel blob\n"); |
| free(kblob_data); |
| return 1; |
| } |
| Debug("vblock_size = 0x%" PRIx64 "\n", vblock_size); |
| |
| /* We should be creating a completely new output file. |
| * If not, something's wrong. */ |
| if (!option.create_new_outfile) |
| DIE; |
| |
| if (option.vblockonly) |
| rv = WriteSomeParts(option.outfile, |
| vblock_data, vblock_size, |
| NULL, 0); |
| else |
| rv = WriteSomeParts(option.outfile, |
| vblock_data, vblock_size, |
| kblob_data, kblob_size); |
| |
| free(vblock_data); |
| free(kblob_data); |
| return rv; |
| } |
| |
| int futil_cb_resign_kernel_part(struct futil_traverse_state_s *state) |
| { |
| uint8_t *kpart_data, *kblob_data, *vblock_data; |
| uint64_t kpart_size, kblob_size, vblock_size; |
| VbKeyBlockHeader *keyblock = NULL; |
| VbKernelPreambleHeader *preamble = NULL; |
| int rv = 0; |
| |
| kpart_data = state->my_area->buf; |
| kpart_size = state->my_area->len; |
| |
| /* Note: This just sets some static pointers. It doesn't malloc. */ |
| kblob_data = UnpackKPart(kpart_data, kpart_size, option.padding, |
| &keyblock, &preamble, &kblob_size); |
| |
| if (!kblob_data) { |
| fprintf(stderr, "Unable to unpack kernel partition\n"); |
| return 1; |
| } |
| |
| /* |
| * We don't let --kloadaddr change when resigning, because the original |
| * vbutil_kernel program didn't do it right. Since obviously no one |
| * ever noticed, we'll maintain bug-compatibility by just not allowing |
| * it here either. To enable it, we'd need to update the zeropage |
| * table's cmd_line_ptr as well as the preamble. |
| */ |
| option.kloadaddr = preamble->body_load_address; |
| |
| /* Replace the config if asked */ |
| if (option.config_data && |
| 0 != UpdateKernelBlobConfig(kblob_data, kblob_size, |
| option.config_data, |
| option.config_size)) { |
| fprintf(stderr, "Unable to update config\n"); |
| return 1; |
| } |
| |
| /* Preserve the version unless a new one is given */ |
| if (!option.version_specified) |
| option.version = preamble->kernel_version; |
| |
| /* Preserve the flags if not specified */ |
| if (VbKernelHasFlags(preamble) == VBOOT_SUCCESS) { |
| if (option.flags_specified == 0) |
| option.flags = preamble->flags; |
| } |
| |
| /* Replace the keyblock if asked */ |
| if (option.keyblock) |
| keyblock = option.keyblock; |
| |
| /* Compute the new signature */ |
| vblock_data = SignKernelBlob(kblob_data, kblob_size, option.padding, |
| option.version, option.kloadaddr, |
| keyblock, option.signprivate, |
| option.flags, &vblock_size); |
| if (!vblock_data) { |
| fprintf(stderr, "Unable to sign kernel blob\n"); |
| return 1; |
| } |
| Debug("vblock_size = 0x%" PRIx64 "\n", vblock_size); |
| |
| if (option.create_new_outfile) { |
| /* Write out what we've been asked for */ |
| if (option.vblockonly) |
| rv = WriteSomeParts(option.outfile, |
| vblock_data, vblock_size, |
| NULL, 0); |
| else |
| rv = WriteSomeParts(option.outfile, |
| vblock_data, vblock_size, |
| kblob_data, kblob_size); |
| } else { |
| /* If we're modifying an existing file, it's mmap'ed so that |
| * all our modifications to the buffer will get flushed to |
| * disk when we close it. */ |
| Memcpy(kpart_data, vblock_data, vblock_size); |
| } |
| |
| free(vblock_data); |
| return rv; |
| } |
| |
| |
| int futil_cb_sign_raw_firmware(struct futil_traverse_state_s *state) |
| { |
| VbSignature *body_sig; |
| VbFirmwarePreambleHeader *preamble; |
| int rv; |
| |
| body_sig = CalculateSignature(state->my_area->buf, state->my_area->len, |
| option.signprivate); |
| if (!body_sig) { |
| fprintf(stderr, "Error calculating body signature\n"); |
| return 1; |
| } |
| |
| preamble = CreateFirmwarePreamble(option.version, |
| option.kernel_subkey, |
| body_sig, |
| option.signprivate, |
| option.flags); |
| if (!preamble) { |
| fprintf(stderr, "Error creating firmware preamble.\n"); |
| free(body_sig); |
| return 1; |
| } |
| |
| rv = WriteSomeParts(option.outfile, |
| option.keyblock, option.keyblock->key_block_size, |
| preamble, preamble->preamble_size); |
| |
| free(preamble); |
| free(body_sig); |
| |
| return rv; |
| } |
| |
| |
| int futil_cb_sign_begin(struct futil_traverse_state_s *state) |
| { |
| if (state->in_type == FILE_TYPE_UNKNOWN) { |
| fprintf(stderr, "Unable to determine type of %s\n", |
| state->in_filename); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static int write_new_preamble(struct cb_area_s *vblock, |
| struct cb_area_s *fw_body, |
| VbPrivateKey *signkey, |
| VbKeyBlockHeader *keyblock) |
| { |
| VbSignature *body_sig; |
| VbFirmwarePreambleHeader *preamble; |
| |
| body_sig = CalculateSignature(fw_body->buf, fw_body->len, signkey); |
| if (!body_sig) { |
| fprintf(stderr, "Error calculating body signature\n"); |
| return 1; |
| } |
| |
| preamble = CreateFirmwarePreamble(option.version, |
| option.kernel_subkey, |
| body_sig, |
| signkey, |
| option.flags); |
| if (!preamble) { |
| fprintf(stderr, "Error creating firmware preamble.\n"); |
| free(body_sig); |
| return 1; |
| } |
| |
| /* Write the new keyblock */ |
| uint32_t more = keyblock->key_block_size; |
| memcpy(vblock->buf, keyblock, more); |
| /* and the new preamble */ |
| memcpy(vblock->buf + more, preamble, preamble->preamble_size); |
| |
| free(preamble); |
| free(body_sig); |
| |
| return 0; |
| } |
| |
| static int write_loem(const char *ab, struct cb_area_s *vblock) |
| { |
| char filename[PATH_MAX]; |
| int n; |
| n = snprintf(filename, sizeof(filename), "%s/vblock_%s.%s", |
| option.loemdir ? option.loemdir : ".", |
| ab, option.loemid); |
| if (n >= sizeof(filename)) { |
| fprintf(stderr, "LOEM args produce bogus filename\n"); |
| return 1; |
| } |
| |
| FILE *fp = fopen(filename, "w"); |
| if (!fp) { |
| fprintf(stderr, "Can't open %s for writing: %s\n", |
| filename, strerror(errno)); |
| return 1; |
| } |
| |
| if (1 != fwrite(vblock->buf, vblock->len, 1, fp)) { |
| fprintf(stderr, "Can't write to %s: %s\n", |
| filename, strerror(errno)); |
| fclose(fp); |
| return 1; |
| } |
| if (fclose(fp)) { |
| fprintf(stderr, "Failed closing loem output: %s\n", |
| strerror(errno)); |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* This signs a full BIOS image after it's been traversed. */ |
| static int sign_bios_at_end(struct futil_traverse_state_s *state) |
| { |
| struct cb_area_s *vblock_a = &state->cb_area[CB_FMAP_VBLOCK_A]; |
| struct cb_area_s *vblock_b = &state->cb_area[CB_FMAP_VBLOCK_B]; |
| struct cb_area_s *fw_a = &state->cb_area[CB_FMAP_FW_MAIN_A]; |
| struct cb_area_s *fw_b = &state->cb_area[CB_FMAP_FW_MAIN_B]; |
| int retval = 0; |
| |
| if (state->errors || |
| !(vblock_a->_flags & AREA_IS_VALID) || |
| !(vblock_b->_flags & AREA_IS_VALID) || |
| !(fw_a->_flags & AREA_IS_VALID) || |
| !(fw_b->_flags & AREA_IS_VALID)) { |
| fprintf(stderr, "Something's wrong. Not changing anything\n"); |
| return 1; |
| } |
| |
| /* Do A & B differ ? */ |
| if (fw_a->len != fw_b->len || |
| memcmp(fw_a->buf, fw_b->buf, fw_a->len)) { |
| /* Yes, must use DEV keys for A */ |
| if (!option.devsignprivate || !option.devkeyblock) { |
| fprintf(stderr, |
| "FW A & B differ. DEV keys are required.\n"); |
| return 1; |
| } |
| retval |= write_new_preamble(vblock_a, fw_a, |
| option.devsignprivate, |
| option.devkeyblock); |
| } else { |
| retval |= write_new_preamble(vblock_a, fw_a, |
| option.signprivate, |
| option.keyblock); |
| } |
| |
| /* FW B is always normal keys */ |
| retval |= write_new_preamble(vblock_b, fw_b, |
| option.signprivate, |
| option.keyblock); |
| |
| |
| |
| |
| if (option.loemid) { |
| retval |= write_loem("A", vblock_a); |
| retval |= write_loem("B", vblock_b); |
| } |
| |
| return retval; |
| } |
| |
| int futil_cb_sign_end(struct futil_traverse_state_s *state) |
| { |
| switch (state->in_type) { |
| case FILE_TYPE_BIOS_IMAGE: |
| case FILE_TYPE_OLD_BIOS_IMAGE: |
| return sign_bios_at_end(state); |
| |
| default: |
| /* Any other cleanup needed? */ |
| break; |
| } |
| |
| return state->errors; |
| } |
| |
| static const char usage[] = "\n" |
| "Usage: " MYNAME " %s [PARAMS] INFILE [OUTFILE]\n" |
| "\n" |
| "Where INFILE is a\n" |
| "\n" |
| " public key (.vbpubk); OUTFILE is a keyblock\n" |
| " raw firmware blob (FW_MAIN_A/B); OUTFILE is a VBLOCK_A/B\n" |
| " complete firmware image (bios.bin)\n" |
| " raw linux kernel; OUTFILE is a kernel partition image\n" |
| " kernel partition image (/dev/sda2, /dev/mmcblk0p2)\n"; |
| |
| static const char usage_pubkey[] = "\n" |
| "-----------------------------------------------------------------\n" |
| "To sign a public key / create a new keyblock:\n" |
| "\n" |
| "Required PARAMS:\n" |
| " [--datapubkey] INFILE The public key to wrap\n" |
| " [--outfile] OUTFILE The resulting keyblock\n" |
| "\n" |
| "Optional PARAMS:\n" |
| " A private signing key, specified as either\n" |
| " -s|--signprivate FILE.vbprivk Signing key in .vbprivk format\n" |
| " Or\n" |
| " --pem_signpriv FILE.pem Signing key in PEM format...\n" |
| " --pem_algo NUM AND the algorithm to use (0 - %d)\n" |
| "\n" |
| " If a signing key is not given, the keyblock will not be signed (duh)." |
| "\n\n" |
| "And these, too:\n\n" |
| " -f|--flags NUM Flags specifying use conditions\n" |
| " --pem_external PROGRAM" |
| " External program to compute the signature\n" |
| " (requires a PEM signing key)\n"; |
| |
| static const char usage_fw_main[] = "\n" |
| "-----------------------------------------------------------------\n" |
| "To sign a raw firmware blob (FW_MAIN_A/B):\n" |
| "\n" |
| "Required PARAMS:\n" |
| " -s|--signprivate FILE.vbprivk The private firmware data key\n" |
| " -b|--keyblock FILE.keyblock The keyblock containing the\n" |
| " public firmware data key\n" |
| " -k|--kernelkey FILE.vbpubk The public kernel subkey\n" |
| " -v|--version NUM The firmware version number\n" |
| " [--fv] INFILE" |
| " The raw firmware blob (FW_MAIN_A/B)\n" |
| " [--outfile] OUTFILE Output VBLOCK_A/B\n" |
| "\n" |
| "Optional PARAMS:\n" |
| " -f|--flags NUM The preamble flags value" |
| " (default is 0)\n"; |
| |
| static const char usage_bios[] = "\n" |
| "-----------------------------------------------------------------\n" |
| "To sign a complete firmware image (bios.bin):\n" |
| "\n" |
| "Required PARAMS:\n" |
| " -s|--signprivate FILE.vbprivk The private firmware data key\n" |
| " -b|--keyblock FILE.keyblock The keyblock containing the\n" |
| " public firmware data key\n" |
| " -k|--kernelkey FILE.vbpubk The public kernel subkey\n" |
| " [--infile] INFILE Input firmware image (modified\n" |
| " in place if no OUTFILE given)\n" |
| "\n" |
| "These are required if the A and B firmware differ:\n" |
| " -S|--devsign FILE.vbprivk The DEV private firmware data key\n" |
| " -B|--devkeyblock FILE.keyblock The keyblock containing the\n" |
| " DEV public firmware data key\n" |
| "\n" |
| "Optional PARAMS:\n" |
| " -v|--version NUM The firmware version number" |
| " (default %d)\n" |
| " -f|--flags NUM The preamble flags value" |
| " (default is\n" |
| " unchanged, or 0 if unknown)\n" |
| " -d|--loemdir DIR Local OEM output vblock directory\n" |
| " -l|--loemid STRING Local OEM vblock suffix\n" |
| " [--outfile] OUTFILE Output firmware image\n"; |
| |
| static const char usage_new_kpart[] = "\n" |
| "-----------------------------------------------------------------\n" |
| "To create a new kernel parition image (/dev/sda2, /dev/mmcblk0p2):\n" |
| "\n" |
| "Required PARAMS:\n" |
| " -s|--signprivate FILE.vbprivk" |
| " The private key to sign the kernel blob\n" |
| " -b|--keyblock FILE.keyblock The keyblock containing the public\n" |
| " key to verify the kernel blob\n" |
| " -v|--version NUM The kernel version number\n" |
| " --bootloader FILE Bootloader stub\n" |
| " --config FILE The kernel commandline file\n" |
| " --arch ARCH The CPU architecture (one of\n" |
| " x86|amd64, arm|aarch64, mips)\n" |
| " [--vmlinuz] INFILE Linux kernel bzImage file\n" |
| " [--outfile] OUTFILE Output kernel partition or vblock\n" |
| "\n" |
| "Optional PARAMS:\n" |
| " --kloadaddr NUM" |
| " RAM address to load the kernel body\n" |
| " (default 0x%x)\n" |
| " --pad NUM The vblock padding size in bytes\n" |
| " (default 0x%x)\n" |
| " --vblockonly Emit just the vblock (requires a\n" |
| " distinct outfile)\n" |
| " -f|--flags NUM The preamble flags value\n"; |
| |
| static const char usage_old_kpart[] = "\n" |
| "-----------------------------------------------------------------\n" |
| "To resign an existing kernel parition (/dev/sda2, /dev/mmcblk0p2):\n" |
| "\n" |
| "Required PARAMS:\n" |
| " -s|--signprivate FILE.vbprivk" |
| " The private key to sign the kernel blob\n" |
| " [--infile] INFILE Input kernel partition (modified\n" |
| " in place if no OUTFILE given)\n" |
| "\n" |
| "Optional PARAMS:\n" |
| " -b|--keyblock FILE.keyblock The keyblock containing the public\n" |
| " key to verify the kernel blob\n" |
| " -v|--version NUM The kernel version number\n" |
| " --config FILE The kernel commandline file\n" |
| " --pad NUM The vblock padding size in bytes\n" |
| " (default 0x%x)\n" |
| " [--outfile] OUTFILE Output kernel partition or vblock\n" |
| " --vblockonly Emit just the vblock (requires a\n" |
| " distinct OUTFILE)\n" |
| " -f|--flags NUM The preamble flags value\n" |
| "\n"; |
| |
| static void print_help(const char *prog) |
| { |
| printf(usage, prog); |
| printf(usage_pubkey, kNumAlgorithms - 1); |
| puts(usage_fw_main); |
| printf(usage_bios, option.version); |
| printf(usage_new_kpart, option.kloadaddr, option.padding); |
| printf(usage_old_kpart, option.padding); |
| } |
| |
| enum no_short_opts { |
| OPT_FV = 1000, |
| OPT_INFILE, /* aka "--vmlinuz" */ |
| OPT_OUTFILE, |
| OPT_BOOTLOADER, |
| OPT_CONFIG, |
| OPT_ARCH, |
| OPT_KLOADADDR, |
| OPT_PADDING, |
| OPT_PEM_SIGNPRIV, |
| OPT_PEM_ALGO, |
| OPT_PEM_EXTERNAL, |
| }; |
| |
| static const struct option long_opts[] = { |
| /* name hasarg *flag val */ |
| {"signprivate", 1, NULL, 's'}, |
| {"keyblock", 1, NULL, 'b'}, |
| {"kernelkey", 1, NULL, 'k'}, |
| {"devsign", 1, NULL, 'S'}, |
| {"devkeyblock", 1, NULL, 'B'}, |
| {"version", 1, NULL, 'v'}, |
| {"flags", 1, NULL, 'f'}, |
| {"loemdir", 1, NULL, 'd'}, |
| {"loemid", 1, NULL, 'l'}, |
| {"fv", 1, NULL, OPT_FV}, |
| {"infile", 1, NULL, OPT_INFILE}, |
| {"datapubkey", 1, NULL, OPT_INFILE}, /* alias */ |
| {"vmlinuz", 1, NULL, OPT_INFILE}, /* alias */ |
| {"outfile", 1, NULL, OPT_OUTFILE}, |
| {"bootloader", 1, NULL, OPT_BOOTLOADER}, |
| {"config", 1, NULL, OPT_CONFIG}, |
| {"arch", 1, NULL, OPT_ARCH}, |
| {"kloadaddr", 1, NULL, OPT_KLOADADDR}, |
| {"pad", 1, NULL, OPT_PADDING}, |
| {"pem_signpriv", 1, NULL, OPT_PEM_SIGNPRIV}, |
| {"pem_algo", 1, NULL, OPT_PEM_ALGO}, |
| {"pem_external", 1, NULL, OPT_PEM_EXTERNAL}, |
| {"vblockonly", 0, &option.vblockonly, 1}, |
| {"debug", 0, &debugging_enabled, 1}, |
| {NULL, 0, NULL, 0}, |
| }; |
| static char *short_opts = ":s:b:k:S:B:v:f:d:l:"; |
| |
| static int do_sign(int argc, char *argv[]) |
| { |
| char *infile = 0; |
| int i; |
| int ifd = -1; |
| int errorcnt = 0; |
| struct futil_traverse_state_s state; |
| uint8_t *buf; |
| uint32_t buf_len; |
| char *e = 0; |
| enum futil_file_type type; |
| int inout_file_count = 0; |
| int mapping; |
| |
| opterr = 0; /* quiet, you */ |
| while ((i = getopt_long(argc, argv, short_opts, long_opts, 0)) != -1) { |
| switch (i) { |
| case 's': |
| option.signprivate = PrivateKeyRead(optarg); |
| if (!option.signprivate) { |
| fprintf(stderr, "Error reading %s\n", optarg); |
| errorcnt++; |
| } |
| break; |
| case 'b': |
| option.keyblock = KeyBlockRead(optarg); |
| if (!option.keyblock) { |
| fprintf(stderr, "Error reading %s\n", optarg); |
| errorcnt++; |
| } |
| break; |
| case 'k': |
| option.kernel_subkey = PublicKeyRead(optarg); |
| if (!option.kernel_subkey) { |
| fprintf(stderr, "Error reading %s\n", optarg); |
| errorcnt++; |
| } |
| break; |
| case 'S': |
| option.devsignprivate = PrivateKeyRead(optarg); |
| if (!option.devsignprivate) { |
| fprintf(stderr, "Error reading %s\n", optarg); |
| errorcnt++; |
| } |
| break; |
| case 'B': |
| option.devkeyblock = KeyBlockRead(optarg); |
| if (!option.devkeyblock) { |
| fprintf(stderr, "Error reading %s\n", optarg); |
| errorcnt++; |
| } |
| break; |
| case 'v': |
| option.version_specified = 1; |
| option.version = strtoul(optarg, &e, 0); |
| if (!*optarg || (e && *e)) { |
| fprintf(stderr, |
| "Invalid --version \"%s\"\n", optarg); |
| errorcnt++; |
| } |
| break; |
| |
| case 'f': |
| option.flags_specified = 1; |
| option.flags = strtoul(optarg, &e, 0); |
| if (!*optarg || (e && *e)) { |
| fprintf(stderr, |
| "Invalid --flags \"%s\"\n", optarg); |
| errorcnt++; |
| } |
| break; |
| case 'd': |
| option.loemdir = optarg; |
| break; |
| case 'l': |
| option.loemid = optarg; |
| break; |
| case OPT_FV: |
| option.fv_specified = 1; |
| /* fallthrough */ |
| case OPT_INFILE: /* aka "--vmlinuz" */ |
| inout_file_count++; |
| infile = optarg; |
| break; |
| case OPT_OUTFILE: |
| inout_file_count++; |
| option.outfile = optarg; |
| break; |
| case OPT_BOOTLOADER: |
| option.bootloader_data = ReadFile( |
| optarg, &option.bootloader_size); |
| if (!option.bootloader_data) { |
| fprintf(stderr, |
| "Error reading bootloader file: %s\n", |
| strerror(errno)); |
| errorcnt++; |
| } |
| Debug("bootloader file size=0x%" PRIx64 "\n", |
| option.bootloader_size); |
| break; |
| case OPT_CONFIG: |
| option.config_data = ReadConfigFile( |
| optarg, &option.config_size); |
| if (!option.config_data) { |
| fprintf(stderr, |
| "Error reading config file: %s\n", |
| strerror(errno)); |
| errorcnt++; |
| } |
| break; |
| case OPT_ARCH: |
| /* check the first 3 characters to also match x86_64 */ |
| if ((!strncasecmp(optarg, "x86", 3)) || |
| (!strcasecmp(optarg, "amd64"))) |
| option.arch = ARCH_X86; |
| else if ((!strcasecmp(optarg, "arm")) || |
| (!strcasecmp(optarg, "aarch64"))) |
| option.arch = ARCH_ARM; |
| else if (!strcasecmp(optarg, "mips")) |
| option.arch = ARCH_MIPS; |
| else { |
| fprintf(stderr, |
| "Unknown architecture: \"%s\"\n", |
| optarg); |
| errorcnt++; |
| } |
| break; |
| case OPT_KLOADADDR: |
| option.kloadaddr = strtoul(optarg, &e, 0); |
| if (!*optarg || (e && *e)) { |
| fprintf(stderr, |
| "Invalid --kloadaddr \"%s\"\n", optarg); |
| errorcnt++; |
| } |
| break; |
| case OPT_PADDING: |
| option.padding = strtoul(optarg, &e, 0); |
| if (!*optarg || (e && *e)) { |
| fprintf(stderr, |
| "Invalid --padding \"%s\"\n", optarg); |
| errorcnt++; |
| } |
| break; |
| case OPT_PEM_SIGNPRIV: |
| option.pem_signpriv = optarg; |
| break; |
| case OPT_PEM_ALGO: |
| option.pem_algo_specified = 1; |
| option.pem_algo = strtoul(optarg, &e, 0); |
| if (!*optarg || (e && *e) || |
| (option.pem_algo >= kNumAlgorithms)) { |
| fprintf(stderr, |
| "Invalid --pem_algo \"%s\"\n", optarg); |
| errorcnt++; |
| } |
| break; |
| case OPT_PEM_EXTERNAL: |
| option.pem_external = optarg; |
| break; |
| |
| case '?': |
| if (optopt) |
| fprintf(stderr, "Unrecognized option: -%c\n", |
| optopt); |
| else |
| fprintf(stderr, "Unrecognized option: %s\n", |
| argv[optind - 1]); |
| errorcnt++; |
| break; |
| case ':': |
| fprintf(stderr, "Missing argument to -%c\n", optopt); |
| errorcnt++; |
| break; |
| case 0: /* handled option */ |
| break; |
| default: |
| Debug("i=%d\n", i); |
| DIE; |
| } |
| } |
| |
| /* If we don't have an input file already, we need one */ |
| if (!infile) { |
| if (argc - optind <= 0) { |
| errorcnt++; |
| fprintf(stderr, "ERROR: missing input filename\n"); |
| goto done; |
| } else { |
| inout_file_count++; |
| infile = argv[optind++]; |
| } |
| } |
| |
| /* Look for an output file if we don't have one, just in case. */ |
| if (!option.outfile && argc - optind > 0) { |
| inout_file_count++; |
| option.outfile = argv[optind++]; |
| } |
| |
| /* What are we looking at? */ |
| if (futil_file_type(infile, &type)) { |
| errorcnt++; |
| goto done; |
| } |
| |
| /* We may be able to infer the type based on the other args */ |
| if (type == FILE_TYPE_UNKNOWN) { |
| if (option.bootloader_data || option.config_data |
| || option.arch != ARCH_UNSPECIFIED) |
| type = FILE_TYPE_RAW_KERNEL; |
| else if (option.kernel_subkey || option.fv_specified) |
| type = FILE_TYPE_RAW_FIRMWARE; |
| } |
| |
| Debug("type=%s\n", futil_file_type_str(type)); |
| |
| /* Check the arguments for the type of thing we want to sign */ |
| switch (type) { |
| case FILE_TYPE_UNKNOWN: |
| fprintf(stderr, |
| "Unable to determine the type of the input file\n"); |
| errorcnt++; |
| goto done; |
| case FILE_TYPE_PUBKEY: |
| option.create_new_outfile = 1; |
| if (option.signprivate && option.pem_signpriv) { |
| fprintf(stderr, |
| "Only one of --signprivate and --pem_signpriv" |
| " can be specified\n"); |
| errorcnt++; |
| } |
| if ((option.signprivate && option.pem_algo_specified) || |
| (option.pem_signpriv && !option.pem_algo_specified)) { |
| fprintf(stderr, "--pem_algo must be used with" |
| " --pem_signpriv\n"); |
| errorcnt++; |
| } |
| if (option.pem_external && !option.pem_signpriv) { |
| fprintf(stderr, "--pem_external must be used with" |
| " --pem_signpriv\n"); |
| errorcnt++; |
| } |
| /* We'll wait to read the PEM file, since the external signer |
| * may want to read it instead. */ |
| break; |
| case FILE_TYPE_KEYBLOCK: |
| fprintf(stderr, "Resigning a keyblock is kind of pointless.\n"); |
| fprintf(stderr, "Just create a new one.\n"); |
| errorcnt++; |
| break; |
| case FILE_TYPE_FW_PREAMBLE: |
| fprintf(stderr, |
| "%s IS a signature. Sign the firmware instead\n", |
| infile); |
| break; |
| case FILE_TYPE_GBB: |
| fprintf(stderr, "There's no way to sign a GBB\n"); |
| errorcnt++; |
| break; |
| case FILE_TYPE_BIOS_IMAGE: |
| case FILE_TYPE_OLD_BIOS_IMAGE: |
| errorcnt += no_opt_if(!option.signprivate, "signprivate"); |
| errorcnt += no_opt_if(!option.keyblock, "keyblock"); |
| errorcnt += no_opt_if(!option.kernel_subkey, "kernelkey"); |
| break; |
| case FILE_TYPE_KERN_PREAMBLE: |
| errorcnt += no_opt_if(!option.signprivate, "signprivate"); |
| if (option.vblockonly || inout_file_count > 1) |
| option.create_new_outfile = 1; |
| break; |
| case FILE_TYPE_RAW_FIRMWARE: |
| option.create_new_outfile = 1; |
| errorcnt += no_opt_if(!option.signprivate, "signprivate"); |
| errorcnt += no_opt_if(!option.keyblock, "keyblock"); |
| errorcnt += no_opt_if(!option.kernel_subkey, "kernelkey"); |
| errorcnt += no_opt_if(!option.version_specified, "version"); |
| break; |
| case FILE_TYPE_RAW_KERNEL: |
| option.create_new_outfile = 1; |
| errorcnt += no_opt_if(!option.signprivate, "signprivate"); |
| errorcnt += no_opt_if(!option.keyblock, "keyblock"); |
| errorcnt += no_opt_if(!option.version_specified, "version"); |
| errorcnt += no_opt_if(!option.bootloader_data, "bootloader"); |
| errorcnt += no_opt_if(!option.config_data, "config"); |
| errorcnt += no_opt_if(option.arch == ARCH_UNSPECIFIED, "arch"); |
| break; |
| case FILE_TYPE_CHROMIUMOS_DISK: |
| fprintf(stderr, "Signing a %s is not yet supported\n", |
| futil_file_type_str(type)); |
| errorcnt++; |
| break; |
| default: |
| DIE; |
| } |
| |
| Debug("infile=%s\n", infile); |
| Debug("inout_file_count=%d\n", inout_file_count); |
| Debug("option.create_new_outfile=%d\n", option.create_new_outfile); |
| |
| /* Make sure we have an output file if one is needed */ |
| if (!option.outfile) { |
| if (option.create_new_outfile) { |
| errorcnt++; |
| fprintf(stderr, "Missing output filename\n"); |
| goto done; |
| } else { |
| option.outfile = infile; |
| } |
| } |
| |
| Debug("option.outfile=%s\n", option.outfile); |
| |
| if (argc - optind > 0) { |
| errorcnt++; |
| fprintf(stderr, "ERROR: too many arguments left over\n"); |
| } |
| |
| if (errorcnt) |
| goto done; |
| |
| memset(&state, 0, sizeof(state)); |
| state.op = FUTIL_OP_SIGN; |
| |
| if (option.create_new_outfile) { |
| /* The input is read-only, the output is write-only. */ |
| mapping = MAP_RO; |
| state.in_filename = infile; |
| Debug("open RO %s\n", infile); |
| ifd = open(infile, O_RDONLY); |
| if (ifd < 0) { |
| errorcnt++; |
| fprintf(stderr, "Can't open %s for reading: %s\n", |
| infile, strerror(errno)); |
| goto done; |
| } |
| } else { |
| /* We'll read-modify-write the output file */ |
| mapping = MAP_RW; |
| state.in_filename = option.outfile; |
| if (inout_file_count > 1) |
| futil_copy_file_or_die(infile, option.outfile); |
| Debug("open RW %s\n", option.outfile); |
| ifd = open(option.outfile, O_RDWR); |
| if (ifd < 0) { |
| errorcnt++; |
| fprintf(stderr, "Can't open %s for writing: %s\n", |
| option.outfile, strerror(errno)); |
| goto done; |
| } |
| } |
| |
| if (0 != futil_map_file(ifd, mapping, &buf, &buf_len)) { |
| errorcnt++; |
| goto done; |
| } |
| |
| errorcnt += futil_traverse(buf, buf_len, &state, type); |
| |
| errorcnt += futil_unmap_file(ifd, MAP_RW, buf, buf_len); |
| |
| done: |
| if (ifd >= 0 && close(ifd)) { |
| errorcnt++; |
| fprintf(stderr, "Error when closing ifd: %s\n", |
| strerror(errno)); |
| } |
| |
| if (option.signprivate) |
| free(option.signprivate); |
| if (option.keyblock) |
| free(option.keyblock); |
| if (option.kernel_subkey) |
| free(option.kernel_subkey); |
| |
| if (errorcnt) |
| fprintf(stderr, "Use --help for usage instructions\n"); |
| |
| return !!errorcnt; |
| } |
| |
| DECLARE_FUTIL_COMMAND(sign, do_sign, |
| VBOOT_VERSION_ALL, |
| "Sign / resign various binary components", |
| print_help); |