diff options
Diffstat (limited to 'tools/mkeficapsule.c')
| -rw-r--r-- | tools/mkeficapsule.c | 1125 |
1 files changed, 1125 insertions, 0 deletions
diff --git a/tools/mkeficapsule.c b/tools/mkeficapsule.c new file mode 100644 index 00000000000..fb6c57f77c1 --- /dev/null +++ b/tools/mkeficapsule.c @@ -0,0 +1,1125 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2018 Linaro Limited + * Author: AKASHI Takahiro + */ + +#include <getopt.h> +#include <inttypes.h> +#include <pe.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <linux/types.h> + +#include <sys/stat.h> +#include <sys/types.h> + +#include <gnutls/gnutls.h> +#include <gnutls/pkcs7.h> +#include <gnutls/abstract.h> + +#include <version.h> +#include <libfdt.h> +#include <u-boot/uuid.h> + +#include "eficapsule.h" + +// Matches CONFIG_EFI_CAPSULE_NAMESPACE_GUID +#define DEFAULT_NAMESPACE_GUID "8c9f137e-91dc-427b-b2d6-b420faebaf2a" + +static const char *tool_name = "mkeficapsule"; + +efi_guid_t efi_guid_fm_capsule = EFI_FIRMWARE_MANAGEMENT_CAPSULE_ID_GUID; +efi_guid_t efi_guid_cert_type_pkcs7 = EFI_CERT_TYPE_PKCS7_GUID; + +static const char *opts_short = "g:i:I:v:p:c:m:o:dhARDV"; + +enum { + CAPSULE_NORMAL_BLOB = 0, + CAPSULE_ACCEPT, + CAPSULE_REVERT, +} capsule_type; + +static struct option options[] = { + {"guid", required_argument, NULL, 'g'}, + {"index", required_argument, NULL, 'i'}, + {"instance", required_argument, NULL, 'I'}, + {"fw-version", required_argument, NULL, 'v'}, + {"private-key", required_argument, NULL, 'p'}, + {"certificate", required_argument, NULL, 'c'}, + {"monotonic-count", required_argument, NULL, 'm'}, + {"dump-sig", no_argument, NULL, 'd'}, + {"fw-accept", no_argument, NULL, 'A'}, + {"fw-revert", no_argument, NULL, 'R'}, + {"capoemflag", required_argument, NULL, 'o'}, + {"dump-capsule", no_argument, NULL, 'D'}, + {"help", no_argument, NULL, 'h'}, + {NULL, 0, NULL, 0}, +}; + +static void print_usage_guidgen(void) +{ + fprintf(stderr, "%s guidgen [GUID] DTB IMAGE_NAME...\n" + "Options:\n" + + "\tGUID Namespace GUID (default: %s)\n" + "\tDTB Device Tree Blob\n" + "\tIMAGE_NAME... One or more names of fw_images to generate GUIDs for\n", + tool_name, DEFAULT_NAMESPACE_GUID); +} + +static void print_usage_mkeficapsule(void) +{ + fprintf(stderr, "Usage:\n\n%s [options] <image blob> <output file>\n" + "Options:\n" + + "\t-g, --guid <guid string> guid for image blob type\n" + "\t-i, --index <index> update image index\n" + "\t-I, --instance <instance> update hardware instance\n" + "\t-v, --fw-version <version> firmware version\n" + "\t-p, --private-key <privkey file> private key file\n" + "\t-c, --certificate <cert file> signer's certificate file\n" + "\t-m, --monotonic-count <count> monotonic count\n" + "\t-d, --dump_sig dump signature (*.p7)\n" + "\t-A, --fw-accept firmware accept capsule, requires GUID, no image blob\n" + "\t-R, --fw-revert firmware revert capsule, takes no GUID, no image blob\n" + "\t-o, --capoemflag Capsule OEM Flag, an integer between 0x0000 and 0xffff\n" + "\t-D, --dump-capsule dump the contents of the capsule headers\n" + "\t-V, --version show version number\n" + "\t-h, --help print a help message\n\n", + tool_name); + print_usage_guidgen(); +} + +/** + * auth_context - authentication context + * @key_file: Path to a private key file + * @cert_file: Path to a certificate file + * @image_data: Pointer to firmware data + * @image_size: Size of firmware data + * @auth: Authentication header + * @sig_data: Signature data + * @sig_size: Size of signature data + * + * Data structure used in create_auth_data(). @key_file through + * @image_size are input parameters. @auth, @sig_data and @sig_size + * are filled in by create_auth_data(). + */ +struct auth_context { + char *key_file; + char *cert_file; + uint8_t *image_data; + size_t image_size; + struct efi_firmware_image_authentication auth; + uint8_t *sig_data; + size_t sig_size; +}; + +static int dump_sig; + +/** + * read_bin_file - read a firmware binary file + * @bin: Path to a firmware binary file + * @data: Pointer to pointer of allocated buffer + * @bin_size: Size of allocated buffer + * + * Read out a content of binary, @bin, into @data. + * A caller should free @data. + * + * Return: + * * 0 - on success + * * -1 - on failure + */ +static int read_bin_file(char *bin, uint8_t **data, off_t *bin_size) +{ + FILE *g; + struct stat bin_stat; + void *buf; + size_t size; + int ret = 0; + + g = fopen(bin, "r"); + if (!g) { + fprintf(stderr, "cannot open %s\n", bin); + return -1; + } + if (stat(bin, &bin_stat) < 0) { + fprintf(stderr, "cannot determine the size of %s\n", bin); + ret = -1; + goto err; + } + if (bin_stat.st_size > SIZE_MAX) { + fprintf(stderr, "file size is too large for malloc: %s\n", bin); + ret = -1; + goto err; + } + buf = malloc(bin_stat.st_size); + if (!buf) { + fprintf(stderr, "cannot allocate memory: %zx\n", + (size_t)bin_stat.st_size); + ret = -1; + goto err; + } + + size = fread(buf, 1, bin_stat.st_size, g); + if (size < bin_stat.st_size) { + fprintf(stderr, "read failed (%zx)\n", size); + ret = -1; + goto err; + } + + *data = buf; + *bin_size = bin_stat.st_size; +err: + fclose(g); + + return ret; +} + +/** + * write_capsule_file - write a capsule file + * @bin: FILE stream + * @data: Pointer to data + * @bin_size: Size of data + * + * Write out data, @data, with the size @bin_size. + * + * Return: + * * 0 - on success + * * -1 - on failure + */ +static int write_capsule_file(FILE *f, void *data, size_t size, const char *msg) +{ + size_t size_written; + + size_written = fwrite(data, 1, size, f); + if (size_written < size) { + fprintf(stderr, "%s: write failed (%zx != %zx)\n", msg, + size_written, size); + return -1; + } + + return 0; +} + +/** + * create_auth_data - compose authentication data in capsule + * @auth_context: Pointer to authentication context + * + * Fill up an authentication header (.auth) and signature data (.sig_data) + * in @auth_context, using library functions from openssl. + * All the parameters in @auth_context must be filled in by a caller. + * + * Return: + * * 0 - on success + * * -1 - on failure + */ +static int create_auth_data(struct auth_context *ctx) +{ + gnutls_datum_t cert; + gnutls_datum_t key; + off_t file_size; + gnutls_privkey_t pkey; + gnutls_x509_crt_t x509; + gnutls_pkcs7_t pkcs7; + gnutls_datum_t data; + gnutls_datum_t signature; + int ret; + + ret = read_bin_file(ctx->cert_file, &cert.data, &file_size); + if (ret < 0) + return -1; + if (file_size > UINT_MAX) + return -1; + cert.size = file_size; + + ret = read_bin_file(ctx->key_file, &key.data, &file_size); + if (ret < 0) + return -1; + if (file_size > UINT_MAX) + return -1; + key.size = file_size; + + /* + * For debugging, + * gnutls_global_set_time_function(mytime); + * gnutls_global_set_log_function(tls_log_func); + * gnutls_global_set_log_level(6); + */ + + ret = gnutls_privkey_init(&pkey); + if (ret < 0) { + fprintf(stderr, "error in gnutls_privkey_init(): %s\n", + gnutls_strerror(ret)); + return -1; + } + + ret = gnutls_x509_crt_init(&x509); + if (ret < 0) { + fprintf(stderr, "error in gnutls_x509_crt_init(): %s\n", + gnutls_strerror(ret)); + return -1; + } + + /* load a private key */ + ret = gnutls_privkey_import_x509_raw(pkey, &key, GNUTLS_X509_FMT_PEM, + 0, 0); + if (ret < 0) { + fprintf(stderr, + "error in gnutls_privkey_import_x509_raw(): %s\n", + gnutls_strerror(ret)); + return -1; + } + + /* load x509 certificate */ + ret = gnutls_x509_crt_import(x509, &cert, GNUTLS_X509_FMT_PEM); + if (ret < 0) { + fprintf(stderr, "error in gnutls_x509_crt_import(): %s\n", + gnutls_strerror(ret)); + return -1; + } + + /* generate a PKCS #7 structure */ + ret = gnutls_pkcs7_init(&pkcs7); + if (ret < 0) { + fprintf(stderr, "error in gnutls_pkcs7_init(): %s\n", + gnutls_strerror(ret)); + return -1; + } + + /* sign */ + /* + * Data should have + * * firmware image + * * monotonic count + * in this order! + * See EDK2's FmpAuthenticatedHandlerRsa2048Sha256() + */ + data.size = ctx->image_size + sizeof(ctx->auth.monotonic_count); + data.data = malloc(data.size); + if (!data.data) { + fprintf(stderr, "allocating memory (0x%x) failed\n", data.size); + return -1; + } + memcpy(data.data, ctx->image_data, ctx->image_size); + memcpy(data.data + ctx->image_size, &ctx->auth.monotonic_count, + sizeof(ctx->auth.monotonic_count)); + + ret = gnutls_pkcs7_sign(pkcs7, x509, pkey, &data, NULL, NULL, + GNUTLS_DIG_SHA256, + /* GNUTLS_PKCS7_EMBED_DATA? */ + GNUTLS_PKCS7_INCLUDE_CERT | + GNUTLS_PKCS7_INCLUDE_TIME); + if (ret < 0) { + fprintf(stderr, "error in gnutls_pkcs7)sign(): %s\n", + gnutls_strerror(ret)); + return -1; + } + + /* export */ + ret = gnutls_pkcs7_export2(pkcs7, GNUTLS_X509_FMT_DER, &signature); + if (ret < 0) { + fprintf(stderr, "error in gnutls_pkcs7_export2: %s\n", + gnutls_strerror(ret)); + return -1; + } + ctx->sig_data = signature.data; + ctx->sig_size = signature.size; + + /* fill auth_info */ + ctx->auth.auth_info.hdr.dwLength = sizeof(ctx->auth.auth_info) + + ctx->sig_size; + ctx->auth.auth_info.hdr.wRevision = WIN_CERT_REVISION_2_0; + ctx->auth.auth_info.hdr.wCertificateType = WIN_CERT_TYPE_EFI_GUID; + memcpy(&ctx->auth.auth_info.cert_type, &efi_guid_cert_type_pkcs7, + sizeof(efi_guid_cert_type_pkcs7)); + + /* + * For better clean-ups, + * gnutls_pkcs7_deinit(pkcs7); + * gnutls_privkey_deinit(pkey); + * gnutls_x509_crt_deinit(x509); + * free(cert.data); + * free(key.data); + * if error + * gnutls_free(signature.data); + */ + + return 0; +} + +/** + * dump_signature - dump out a signature + * @path: Path to a capsule file + * @signature: Signature data + * @sig_size: Size of signature data + * + * Signature data pointed to by @signature will be saved into + * a file whose file name is @path with ".p7" suffix. + * + * Return: + * * 0 - on success + * * -1 - on failure + */ +static int dump_signature(const char *path, uint8_t *signature, size_t sig_size) +{ + char *sig_path; + FILE *f; + size_t size; + int ret = -1; + + sig_path = malloc(strlen(path) + 3 + 1); + if (!sig_path) + return ret; + + sprintf(sig_path, "%s.p7", path); + f = fopen(sig_path, "w"); + if (!f) + goto err; + + size = fwrite(signature, 1, sig_size, f); + if (size == sig_size) + ret = 0; + + fclose(f); +err: + free(sig_path); + return ret; +} + +/** + * free_sig_data - free out signature data + * @ctx: Pointer to authentication context + * + * Free signature data allocated in create_auth_data(). + */ +static void free_sig_data(struct auth_context *ctx) +{ + if (ctx->sig_size) + gnutls_free(ctx->sig_data); +} + +/** + * create_fwbin - create an uefi capsule file + * @path: Path to a created capsule file + * @bin: Path to a firmware binary to encapsulate + * @guid: GUID of related FMP driver + * @index: Index number in capsule + * @instance: Instance number in capsule + * @mcount: Monotonic count in authentication information + * @private_file: Path to a private key file + * @cert_file: Path to a certificate file + * @oemflags: Capsule OEM Flags, bits 0-15 + * + * This function actually does the job of creating an uefi capsule file. + * All the arguments must be supplied. + * If either @private_file ror @cert_file is NULL, the capsule file + * won't be signed. + * + * Return: + * * 0 - on success + * * -1 - on failure + */ +static int create_fwbin(char *path, char *bin, efi_guid_t *guid, + unsigned long index, unsigned long instance, + struct fmp_payload_header_params *fmp_ph_params, + uint64_t mcount, char *privkey_file, char *cert_file, + uint16_t oemflags) +{ + struct efi_capsule_header header; + struct efi_firmware_management_capsule_header capsule; + struct efi_firmware_management_capsule_image_header image; + struct auth_context auth_context; + FILE *f; + uint8_t *data, *new_data, *buf; + off_t bin_size; + uint64_t offset; + int ret; + struct fmp_payload_header payload_header; + +#ifdef DEBUG + fprintf(stderr, "For output: %s\n", path); + fprintf(stderr, "\tbin: %s\n\ttype: %pUl\n", bin, guid); + fprintf(stderr, "\tindex: %lu\n\tinstance: %lu\n", index, instance); +#endif + auth_context.sig_size = 0; + f = NULL; + data = NULL; + new_data = NULL; + ret = -1; + + /* + * read a firmware binary + */ + if (read_bin_file(bin, &data, &bin_size)) + goto err; + + buf = data; + + /* insert fmp payload header right before the payload */ + if (fmp_ph_params->have_header) { + new_data = malloc(bin_size + sizeof(payload_header)); + if (!new_data) + goto err; + + payload_header.signature = FMP_PAYLOAD_HDR_SIGNATURE; + payload_header.header_size = sizeof(payload_header); + payload_header.fw_version = fmp_ph_params->fw_version; + payload_header.lowest_supported_version = 0; /* not used */ + memcpy(new_data, &payload_header, sizeof(payload_header)); + memcpy(new_data + sizeof(payload_header), data, bin_size); + buf = new_data; + bin_size += sizeof(payload_header); + } + + /* first, calculate signature to determine its size */ + if (privkey_file && cert_file) { + auth_context.key_file = privkey_file; + auth_context.cert_file = cert_file; + auth_context.auth.monotonic_count = mcount; + auth_context.image_data = buf; + auth_context.image_size = bin_size; + + if (create_auth_data(&auth_context)) { + fprintf(stderr, "Signing firmware image failed\n"); + goto err; + } + + if (dump_sig && + dump_signature(path, auth_context.sig_data, + auth_context.sig_size)) { + fprintf(stderr, "Creating signature file failed\n"); + goto err; + } + } + + /* + * write a capsule file + */ + f = fopen(path, "w"); + if (!f) { + fprintf(stderr, "cannot open %s\n", path); + goto err; + } + + /* + * capsule file header + */ + header.capsule_guid = efi_guid_fm_capsule; + header.header_size = sizeof(header); + /* TODO: The current implementation ignores flags */ + header.flags = CAPSULE_FLAGS_PERSIST_ACROSS_RESET; + if (oemflags) + header.flags |= oemflags; + header.capsule_image_size = sizeof(header) + + sizeof(capsule) + sizeof(uint64_t) + + sizeof(image) + + bin_size; + if (auth_context.sig_size) + header.capsule_image_size += sizeof(auth_context.auth) + + auth_context.sig_size; + if (write_capsule_file(f, &header, sizeof(header), + "Capsule header")) + goto err; + + /* + * firmware capsule header + * This capsule has only one firmware capsule image. + */ + capsule.version = 0x00000001; + capsule.embedded_driver_count = 0; + capsule.payload_item_count = 1; + if (write_capsule_file(f, &capsule, sizeof(capsule), + "Firmware capsule header")) + goto err; + + offset = sizeof(capsule) + sizeof(uint64_t); + if (write_capsule_file(f, &offset, sizeof(offset), + "Offset to capsule image")) + goto err; + + /* + * firmware capsule image header + */ + image.version = 0x00000003; + memcpy(&image.update_image_type_id, guid, sizeof(*guid)); + image.update_image_index = index; + image.reserved[0] = 0; + image.reserved[1] = 0; + image.reserved[2] = 0; + image.update_image_size = bin_size; + if (auth_context.sig_size) + image.update_image_size += sizeof(auth_context.auth) + + auth_context.sig_size; + image.update_vendor_code_size = 0; /* none */ + image.update_hardware_instance = instance; + image.image_capsule_support = 0; + if (auth_context.sig_size) + image.image_capsule_support |= CAPSULE_SUPPORT_AUTHENTICATION; + if (write_capsule_file(f, &image, sizeof(image), + "Firmware capsule image header")) + goto err; + + /* + * signature + */ + if (auth_context.sig_size) { + if (write_capsule_file(f, &auth_context.auth, + sizeof(auth_context.auth), + "Authentication header")) + goto err; + + if (write_capsule_file(f, auth_context.sig_data, + auth_context.sig_size, "Signature")) + goto err; + } + + /* + * firmware binary + */ + if (write_capsule_file(f, buf, bin_size, "Firmware binary")) + goto err; + + ret = 0; +err: + if (f) + fclose(f); + free_sig_data(&auth_context); + free(data); + free(new_data); + + return ret; +} + +static int create_empty_capsule(char *path, efi_guid_t *guid, bool fw_accept) +{ + struct efi_capsule_header header = { 0 }; + FILE *f = NULL; + int ret = -1; + efi_guid_t fw_accept_guid = FW_ACCEPT_OS_GUID; + efi_guid_t fw_revert_guid = FW_REVERT_OS_GUID; + efi_guid_t capsule_guid; + + f = fopen(path, "w"); + if (!f) { + fprintf(stderr, "cannot open %s\n", path); + goto err; + } + + capsule_guid = fw_accept ? fw_accept_guid : fw_revert_guid; + + memcpy(&header.capsule_guid, &capsule_guid, sizeof(efi_guid_t)); + header.header_size = sizeof(header); + header.flags = 0; + + header.capsule_image_size = fw_accept ? + sizeof(header) + sizeof(efi_guid_t) : sizeof(header); + + if (write_capsule_file(f, &header, sizeof(header), + "Capsule header")) + goto err; + + if (fw_accept) { + if (write_capsule_file(f, guid, sizeof(*guid), + "FW Accept Capsule Payload")) + goto err; + } + + ret = 0; + +err: + if (f) + fclose(f); + + return ret; +} + +static void print_guid(void *ptr) +{ + static char buf[37] = { 0 }; + + uuid_bin_to_str(ptr, buf, UUID_STR_FORMAT_GUID | UUID_STR_UPPER_CASE); + printf("%s\n", buf); +} + +static uint32_t dump_fmp_payload_header( + struct fmp_payload_header *fmp_payload_hdr) +{ + if (fmp_payload_hdr->signature == FMP_PAYLOAD_HDR_SIGNATURE) { + printf("--------\n"); + printf("FMP_PAYLOAD_HDR.SIGNATURE\t\t\t: %08X\n", + FMP_PAYLOAD_HDR_SIGNATURE); + printf("FMP_PAYLOAD_HDR.HEADER_SIZE\t\t\t: %08X\n", + fmp_payload_hdr->header_size); + printf("FMP_PAYLOAD_HDR.FW_VERSION\t\t\t: %08X\n", + fmp_payload_hdr->fw_version); + printf("FMP_PAYLOAD_HDR.LOWEST_SUPPORTED_VERSION\t: %08X\n", + fmp_payload_hdr->lowest_supported_version); + return fmp_payload_hdr->header_size; + } + + return 0; +} + +static void dump_capsule_auth_header( + struct efi_firmware_image_authentication *capsule_auth_hdr) +{ + printf("EFI_FIRMWARE_IMAGE_AUTH.MONOTONIC_COUNT\t\t: %08" PRIX64 "\n", + capsule_auth_hdr->monotonic_count); + printf("EFI_FIRMWARE_IMAGE_AUTH.AUTH_INFO.HDR.dwLENGTH\t: %08X\n", + capsule_auth_hdr->auth_info.hdr.dwLength); + printf("EFI_FIRMWARE_IMAGE_AUTH.AUTH_INFO.HDR.wREVISION\t: %08X\n", + capsule_auth_hdr->auth_info.hdr.wRevision); + printf("EFI_FIRMWARE_IMAGE_AUTH.AUTH_INFO.HDR.wCERTTYPE\t: %08X\n", + capsule_auth_hdr->auth_info.hdr.wCertificateType); + printf("EFI_FIRMWARE_IMAGE_AUTH.AUTH_INFO.CERT_TYPE\t: "); + print_guid(&capsule_auth_hdr->auth_info.cert_type); +} + +static void dump_fmp_capsule_image_header( + struct efi_firmware_management_capsule_image_header *image_hdr) +{ + void *capsule_auth_hdr; + void *fmp_payload_hdr; + uint64_t signature_size = 0; + uint32_t payload_size = 0; + uint32_t fmp_payload_hdr_size = 0; + struct efi_firmware_image_authentication *auth_hdr; + + printf("--------\n"); + printf("FMP_CAPSULE_IMAGE_HDR.VERSION\t\t\t: %08X\n", + image_hdr->version); + printf("FMP_CAPSULE_IMAGE_HDR.UPDATE_IMAGE_TYPE_ID\t: "); + print_guid(&image_hdr->update_image_type_id); + printf("FMP_CAPSULE_IMAGE_HDR.UPDATE_IMAGE_INDEX\t: %08X\n", + image_hdr->update_image_index); + printf("FMP_CAPSULE_IMAGE_HDR.UPDATE_IMAGE_SIZE\t\t: %08X\n", + image_hdr->update_image_size); + printf("FMP_CAPSULE_IMAGE_HDR.UPDATE_VENDOR_CODE_SIZE\t: %08X\n", + image_hdr->update_vendor_code_size); + printf("FMP_CAPSULE_IMAGE_HDR.UPDATE_HARDWARE_INSTANCE\t: %08" PRIX64 "\n", + image_hdr->update_hardware_instance); + printf("FMP_CAPSULE_IMAGE_HDR.IMAGE_CAPSULE_SUPPORT\t: %08" PRIX64 "\n", + image_hdr->image_capsule_support); + + printf("--------\n"); + if (image_hdr->image_capsule_support & CAPSULE_SUPPORT_AUTHENTICATION) { + capsule_auth_hdr = (char *)image_hdr + sizeof(*image_hdr); + dump_capsule_auth_header(capsule_auth_hdr); + + auth_hdr = capsule_auth_hdr; + signature_size = sizeof(auth_hdr->monotonic_count) + + auth_hdr->auth_info.hdr.dwLength; + fmp_payload_hdr = (char *)capsule_auth_hdr + signature_size; + } else { + printf("Capsule Authentication Not Enabled\n"); + fmp_payload_hdr = (char *)image_hdr + sizeof(*image_hdr); + } + + fmp_payload_hdr_size = dump_fmp_payload_header(fmp_payload_hdr); + + payload_size = image_hdr->update_image_size - signature_size - + fmp_payload_hdr_size; + printf("--------\n"); + printf("Payload Image Size\t\t\t\t: %08X\n", payload_size); +} + +static void dump_fmp_header( + struct efi_firmware_management_capsule_header *fmp_hdr) +{ + int i; + void *capsule_image_hdr; + + printf("EFI_FMP_HDR.VERSION\t\t\t\t: %08X\n", fmp_hdr->version); + printf("EFI_FMP_HDR.EMBEDDED_DRIVER_COUNT\t\t: %08X\n", + fmp_hdr->embedded_driver_count); + printf("EFI_FMP_HDR.PAYLOAD_ITEM_COUNT\t\t\t: %08X\n", + fmp_hdr->payload_item_count); + + /* + * We currently don't support Embedded Drivers. + * Only worry about the payload items. + */ + for (i = 0; i < fmp_hdr->payload_item_count; i++) { + capsule_image_hdr = (char *)fmp_hdr + + fmp_hdr->item_offset_list[i]; + dump_fmp_capsule_image_header(capsule_image_hdr); + } +} + +static void dump_capsule_header(struct efi_capsule_header *capsule_hdr) +{ + printf("EFI_CAPSULE_HDR.CAPSULE_GUID\t\t\t: "); + print_guid((void *)&capsule_hdr->capsule_guid); + printf("EFI_CAPSULE_HDR.HEADER_SIZE\t\t\t: %08X\n", + capsule_hdr->header_size); + printf("EFI_CAPSULE_HDR.FLAGS\t\t\t\t: %08X\n", capsule_hdr->flags); + printf("EFI_CAPSULE_HDR.CAPSULE_IMAGE_SIZE\t\t: %08X\n", + capsule_hdr->capsule_image_size); +} + +static void normal_capsule_dump(void *capsule_buf) +{ + void *fmp_hdr; + struct efi_capsule_header *hdr = capsule_buf; + + dump_capsule_header(hdr); + printf("--------\n"); + + fmp_hdr = (char *)capsule_buf + sizeof(*hdr); + dump_fmp_header(fmp_hdr); +} + +static void empty_capsule_dump(void *capsule_buf) +{ + efi_guid_t *accept_image_guid; + struct efi_capsule_header *hdr = capsule_buf; + efi_guid_t efi_empty_accept_capsule = FW_ACCEPT_OS_GUID; + + dump_capsule_header(hdr); + + if (!memcmp(&efi_empty_accept_capsule, &hdr->capsule_guid, + sizeof(efi_guid_t))) { + accept_image_guid = (void *)(char *)capsule_buf + + sizeof(struct efi_capsule_header); + printf("--------\n"); + printf("ACCEPT_IMAGE_GUID\t\t\t\t: "); + print_guid(accept_image_guid); + } +} + +static void dump_capsule_contents(char *capsule_file) +{ + int fd; + char *ptr; + efi_guid_t efi_fmp_guid = EFI_FIRMWARE_MANAGEMENT_CAPSULE_ID_GUID; + efi_guid_t efi_empty_accept_capsule = FW_ACCEPT_OS_GUID; + efi_guid_t efi_empty_revert_capsule = FW_REVERT_OS_GUID; + struct stat sbuf; + + if (!capsule_file) { + fprintf(stderr, "No capsule file provided\n"); + exit(EXIT_FAILURE); + } + + if ((fd = open(capsule_file, O_RDONLY)) < 0) { + fprintf(stderr, "Error opening capsule file: %s\n", + capsule_file); + exit(EXIT_FAILURE); + } + + if (fstat(fd, &sbuf) < 0) { + fprintf(stderr, "Can't stat capsule file: %s\n", capsule_file); + exit(EXIT_FAILURE); + } + + if ((ptr = mmap(0, sbuf.st_size, PROT_READ, MAP_SHARED, fd, 0)) + == MAP_FAILED) { + fprintf(stderr, "Can't mmap capsule file: %s\n", capsule_file); + exit(EXIT_FAILURE); + } + + if (!memcmp(&efi_fmp_guid, ptr, sizeof(efi_guid_t))) { + normal_capsule_dump(ptr); + } else if (!memcmp(&efi_empty_accept_capsule, ptr, + sizeof(efi_guid_t)) || + !memcmp(&efi_empty_revert_capsule, ptr, + sizeof(efi_guid_t))) { + empty_capsule_dump(ptr); + } else { + fprintf(stderr, "Unable to decode the capsule file: %s\n", + capsule_file); + exit(EXIT_FAILURE); + } +} + +static struct fdt_header *load_dtb(const char *path) +{ + struct fdt_header *dtb; + ssize_t dtb_size; + FILE *f; + + /* Open and parse DTB */ + f = fopen(path, "r"); + if (!f) { + fprintf(stderr, "Cannot open %s\n", path); + return NULL; + } + + if (fseek(f, 0, SEEK_END)) { + fprintf(stderr, "Cannot seek to the end of %s: %s\n", + path, strerror(errno)); + return NULL; + } + + dtb_size = ftell(f); + if (dtb_size < 0) { + fprintf(stderr, "Cannot ftell %s: %s\n", + path, strerror(errno)); + return NULL; + } + + fseek(f, 0, SEEK_SET); + + dtb = malloc(dtb_size); + if (!dtb) { + fprintf(stderr, "Can't allocated %zd\n", dtb_size); + return NULL; + } + + if (fread(dtb, dtb_size, 1, f) != 1) { + fprintf(stderr, "Can't read %zd bytes from %s\n", + dtb_size, path); + free(dtb); + return NULL; + } + + fclose(f); + + return dtb; +} + +#define MAX_IMAGE_NAME_LEN 128 +static int genguid(int argc, char **argv) +{ + int idx = 2, ret; + unsigned char namespace[16]; + struct efi_guid image_type_id; + const char *dtb_path; + struct fdt_header *dtb; + const char *compatible; + int compatlen, namelen; + uint16_t fw_image[MAX_IMAGE_NAME_LEN]; + + if (argc < 2) { + fprintf(stderr, "Usage: "); + print_usage_guidgen(); + return -1; + } + + if (uuid_str_to_bin(argv[1], namespace, UUID_STR_FORMAT_GUID)) { + uuid_str_to_bin(DEFAULT_NAMESPACE_GUID, namespace, UUID_STR_FORMAT_GUID); + dtb_path = argv[1]; + } else { + dtb_path = argv[2]; + idx = 3; + } + + if (idx == argc) { + fprintf(stderr, "Usage: "); + print_usage_guidgen(); + return -1; + } + + dtb = load_dtb(dtb_path); + if (!dtb) + return -1; + + ret = fdt_check_header(dtb); + if (ret) { + fprintf(stderr, "Invalid DTB header: %d\n", ret); + return -1; + } + + compatible = fdt_getprop(dtb, 0, "compatible", &compatlen); + if (!compatible) { + fprintf(stderr, "No compatible string found in DTB\n"); + return -1; + } + if (strnlen(compatible, compatlen) >= compatlen) { + fprintf(stderr, "Compatible string not null-terminated\n"); + return -1; + } + + printf("Generating GUIDs for %s with namespace %s:\n", + compatible, DEFAULT_NAMESPACE_GUID); + for (; idx < argc; idx++) { + memset(fw_image, 0, sizeof(fw_image)); + namelen = strlen(argv[idx]); + if (namelen > MAX_IMAGE_NAME_LEN) { + fprintf(stderr, "Image name too long: %s\n", argv[idx]); + return -1; + } + + for (int i = 0; i < namelen; i++) + fw_image[i] = (uint16_t)argv[idx][i]; + + gen_v5_guid((struct uuid *)&namespace, &image_type_id, + compatible, strlen(compatible), + fw_image, namelen * sizeof(uint16_t), + NULL); + + printf("%s: ", argv[idx]); + print_guid(&image_type_id); + } + + return 0; +} + +/** + * main - main entry function of mkeficapsule + * @argc: Number of arguments + * @argv: Array of pointers to arguments + * + * Create an uefi capsule file, optionally signing it. + * Parse all the arguments and pass them on to create_fwbin(). + * + * Return: + * * 0 - on success + * * -1 - on failure + */ +int main(int argc, char **argv) +{ + efi_guid_t *guid; + unsigned char uuid_buf[16]; + unsigned long index, instance; + uint64_t mcount; + unsigned long oemflags; + bool capsule_dump; + char *privkey_file, *cert_file; + int c, idx; + struct fmp_payload_header_params fmp_ph_params = { 0 }; + + /* Generate dynamic GUIDs */ + if (argc > 1 && !strcmp(argv[1], "guidgen")) { + if (genguid(argc - 1, argv + 1)) + exit(EXIT_FAILURE); + exit(EXIT_SUCCESS); + } + + guid = NULL; + index = 0; + instance = 0; + mcount = 0; + privkey_file = NULL; + cert_file = NULL; + capsule_dump = false; + dump_sig = 0; + capsule_type = CAPSULE_NORMAL_BLOB; + oemflags = 0; + for (;;) { + c = getopt_long(argc, argv, opts_short, options, &idx); + if (c == -1) + break; + + switch (c) { + case 'g': + if (guid) { + fprintf(stderr, + "Image type already specified\n"); + exit(EXIT_FAILURE); + } + if (uuid_str_to_bin(optarg, uuid_buf, UUID_STR_FORMAT_GUID)) { + fprintf(stderr, "Wrong guid format\n"); + exit(EXIT_FAILURE); + } + guid = (efi_guid_t *)uuid_buf; + break; + case 'i': + index = strtoul(optarg, NULL, 0); + break; + case 'I': + instance = strtoul(optarg, NULL, 0); + break; + case 'v': + fmp_ph_params.fw_version = strtoul(optarg, NULL, 0); + fmp_ph_params.have_header = true; + break; + case 'p': + if (privkey_file) { + fprintf(stderr, + "Private Key already specified\n"); + exit(EXIT_FAILURE); + } + privkey_file = optarg; + break; + case 'c': + if (cert_file) { + fprintf(stderr, + "Certificate file already specified\n"); + exit(EXIT_FAILURE); + } + cert_file = optarg; + break; + case 'm': + mcount = strtoul(optarg, NULL, 0); + break; + case 'd': + dump_sig = 1; + break; + case 'A': + if (capsule_type) { + fprintf(stderr, + "Select either of Accept or Revert capsule generation\n"); + exit(1); + } + capsule_type = CAPSULE_ACCEPT; + break; + case 'R': + if (capsule_type) { + fprintf(stderr, + "Select either of Accept or Revert capsule generation\n"); + exit(1); + } + capsule_type = CAPSULE_REVERT; + break; + case 'o': + oemflags = strtoul(optarg, NULL, 0); + if (oemflags > 0xffff) { + fprintf(stderr, + "oemflags must be between 0x0 and 0xffff\n"); + exit(1); + } + break; + case 'D': + capsule_dump = true; + break; + case 'V': + printf("mkeficapsule version %s\n", PLAIN_VERSION); + exit(EXIT_SUCCESS); + default: + print_usage_mkeficapsule(); + exit(EXIT_FAILURE); + } + } + + if (capsule_dump) { + if (argc != optind + 1) { + fprintf(stderr, "Must provide the capsule file to parse\n"); + exit(EXIT_FAILURE); + } + dump_capsule_contents(argv[argc - 1]); + exit(EXIT_SUCCESS); + } + + /* check necessary parameters */ + if ((capsule_type == CAPSULE_NORMAL_BLOB && + ((argc != optind + 2) || !guid || + ((privkey_file && !cert_file) || + (!privkey_file && cert_file)))) || + (capsule_type != CAPSULE_NORMAL_BLOB && + ((argc != optind + 1) || + ((capsule_type == CAPSULE_ACCEPT) && !guid) || + ((capsule_type == CAPSULE_REVERT) && guid)))) { + print_usage_mkeficapsule(); + exit(EXIT_FAILURE); + } + + if (capsule_type != CAPSULE_NORMAL_BLOB) { + if (create_empty_capsule(argv[argc - 1], guid, + capsule_type == CAPSULE_ACCEPT) < 0) { + fprintf(stderr, "Creating empty capsule failed\n"); + exit(EXIT_FAILURE); + } + } else if (create_fwbin(argv[argc - 1], argv[argc - 2], guid, + index, instance, &fmp_ph_params, mcount, privkey_file, + cert_file, (uint16_t)oemflags) < 0) { + fprintf(stderr, "Creating firmware capsule failed\n"); + exit(EXIT_FAILURE); + } + + exit(EXIT_SUCCESS); +} |