With this enhancement, mkeficapsule will be able to sign a capsule file when it is created. A signature added will be used later in the verification at FMP's SetImage() call.

To do that, we need specify additional command parameters: -monotonic-cout <count> : monotonic count -private-key <private key file> : private key file -certificate <certificate file> : certificate file Only when all of those parameters are given, a signature will be added to a capsule file.

Users are expected to maintain and increment the monotonic count at every time of the update for each firmware image.

Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org Reviewed-by: Simon Glass sjg@chromium.org Acked-by: Ilias Apalodimas ilias.apalodimas@linaro.org --- tools/Makefile | 1 + tools/eficapsule.h | 115 +++++++++++++ tools/mkeficapsule.c | 380 +++++++++++++++++++++++++++++++++++++++---- 3 files changed, 462 insertions(+), 34 deletions(-) create mode 100644 tools/eficapsule.h

diff --git a/tools/Makefile b/tools/Makefile index 766c0674f4a0..8da07d60a755 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -238,6 +238,7 @@ hostprogs-$(CONFIG_MIPS) += mips-relocs hostprogs-$(CONFIG_ASN1_COMPILER) += asn1_compiler HOSTCFLAGS_asn1_compiler.o = -idirafter $(srctree)/include

+HOSTLDLIBS_mkeficapsule += -lgnutls hostprogs-$(CONFIG_TOOLS_MKEFICAPSULE) += mkeficapsule

# We build some files with extra pedantic flags to try to minimize things diff --git a/tools/eficapsule.h b/tools/eficapsule.h new file mode 100644 index 000000000000..8c1560bb0671 --- /dev/null +++ b/tools/eficapsule.h @@ -0,0 +1,115 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2021 Linaro Limited + * Author: AKASHI Takahiro + * + * derived from efi.h and efi_api.h to make the file POSIX-compliant + */ + +#ifndef _EFI_CAPSULE_H +#define _EFI_CAPSULE_H + +#include <stdint.h> +#include <pe.h> /* WIN_CERTIFICATE */ + +/* + * Gcc's predefined attributes are not recognized by clang. + */ +#ifndef __packed +#define __packed __attribute__((__packed__)) +#endif + +#ifndef __aligned +#define __aligned(x) __attribute__((__aligned__(x))) +#endif + +typedef struct { + uint8_t b[16]; +} efi_guid_t __aligned(8); + +#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \ + {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \ + ((a) >> 24) & 0xff, \ + (b) & 0xff, ((b) >> 8) & 0xff, \ + (c) & 0xff, ((c) >> 8) & 0xff, \ + (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } } + +#define EFI_FIRMWARE_MANAGEMENT_CAPSULE_ID_GUID \ + EFI_GUID(0x6dcbd5ed, 0xe82d, 0x4c44, 0xbd, 0xa1, \ + 0x71, 0x94, 0x19, 0x9a, 0xd9, 0x2a) + +#define EFI_FIRMWARE_IMAGE_TYPE_UBOOT_FIT_GUID \ + EFI_GUID(0xae13ff2d, 0x9ad4, 0x4e25, 0x9a, 0xc8, \ + 0x6d, 0x80, 0xb3, 0xb2, 0x21, 0x47) + +#define EFI_FIRMWARE_IMAGE_TYPE_UBOOT_RAW_GUID \ + EFI_GUID(0xe2bb9c06, 0x70e9, 0x4b14, 0x97, 0xa3, \ + 0x5a, 0x79, 0x13, 0x17, 0x6e, 0x3f) + +#define EFI_CERT_TYPE_PKCS7_GUID \ + EFI_GUID(0x4aafd29d, 0x68df, 0x49ee, 0x8a, 0xa9, \ + 0x34, 0x7d, 0x37, 0x56, 0x65, 0xa7) + +/* flags */ +#define CAPSULE_FLAGS_PERSIST_ACROSS_RESET 0x00010000 + +struct efi_capsule_header { + efi_guid_t capsule_guid; + uint32_t header_size; + uint32_t flags; + uint32_t capsule_image_size; +} __packed; + +struct efi_firmware_management_capsule_header { + uint32_t version; + uint16_t embedded_driver_count; + uint16_t payload_item_count; + uint32_t item_offset_list[]; +} __packed; + +/* image_capsule_support */ +#define CAPSULE_SUPPORT_AUTHENTICATION 0x0000000000000001 + +struct efi_firmware_management_capsule_image_header { + uint32_t version; + efi_guid_t update_image_type_id; + uint8_t update_image_index; + uint8_t reserved[3]; + uint32_t update_image_size; + uint32_t update_vendor_code_size; + uint64_t update_hardware_instance; + uint64_t image_capsule_support; +} __packed; + +/** + * win_certificate_uefi_guid - A certificate that encapsulates + * a GUID-specific signature + * + * @hdr: Windows certificate header + * @cert_type: Certificate type + * @cert_data: Certificate data + */ +struct win_certificate_uefi_guid { + WIN_CERTIFICATE hdr; + efi_guid_t cert_type; + uint8_t cert_data[]; +} __packed; + +/** + * efi_firmware_image_authentication - Capsule authentication method + * descriptor + * + * This structure describes an authentication information for + * a capsule with IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED set + * and should be included as part of the capsule. + * Only EFI_CERT_TYPE_PKCS7_GUID is accepted. + * + * @monotonic_count: Count to prevent replay + * @auth_info: Authentication info + */ +struct efi_firmware_image_authentication { + uint64_t monotonic_count; + struct win_certificate_uefi_guid auth_info; +} __packed; + +#endif /* _EFI_CAPSULE_H */ diff --git a/tools/mkeficapsule.c b/tools/mkeficapsule.c index 243fd6e48370..b996c66ad26a 100644 --- a/tools/mkeficapsule.c +++ b/tools/mkeficapsule.c @@ -16,21 +16,13 @@ #include <sys/stat.h> #include <sys/types.h>

-typedef __u8 u8; -typedef __u16 u16; -typedef __u32 u32; -typedef __u64 u64; -typedef __s16 s16; -typedef __s32 s32; +#include <linux/kconfig.h>

-#define aligned_u64 __aligned_u64 +#include <gnutls/gnutls.h> +#include <gnutls/pkcs7.h> +#include <gnutls/abstract.h>

-#ifndef __packed -#define __packed __attribute__((packed)) -#endif - -#include <efi.h> -#include <efi_api.h> +#include "eficapsule.h"

static const char *tool_name = "mkeficapsule";

@@ -39,12 +31,19 @@ efi_guid_t efi_guid_image_type_uboot_fit = EFI_FIRMWARE_IMAGE_TYPE_UBOOT_FIT_GUID; efi_guid_t efi_guid_image_type_uboot_raw = EFI_FIRMWARE_IMAGE_TYPE_UBOOT_RAW_GUID; +efi_guid_t efi_guid_cert_type_pkcs7 = EFI_CERT_TYPE_PKCS7_GUID; + +static const char *opts_short = "f:r:i:I:v:p:c:m:dh";

static struct option options[] = { {"fit", required_argument, NULL, 'f'}, {"raw", required_argument, NULL, 'r'}, {"index", required_argument, NULL, 'i'}, {"instance", required_argument, NULL, 'I'}, + {"private-key", required_argument, NULL, 'p'}, + {"certificate", required_argument, NULL, 'c'}, + {"monotonic-count", required_argument, NULL, 'm'}, + {"dump-sig", no_argument, NULL, 'd'}, {"help", no_argument, NULL, 'h'}, {NULL, 0, NULL, 0}, }; @@ -58,10 +57,40 @@ static void print_usage(void) "\t-r, --raw <raw image> new raw image file\n" "\t-i, --index <index> update image index\n" "\t-I, --instance <instance> update hardware instance\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-h, --help print a help message\n", tool_name); }

+/** + * 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 @@ -75,7 +104,7 @@ static void print_usage(void) * * 0 - on success * * -1 - on failure */ -static int read_bin_file(char *bin, void **data, off_t *bin_size) +static int read_bin_file(char *bin, uint8_t **data, off_t *bin_size) { FILE *g; struct stat bin_stat; @@ -147,6 +176,205 @@ static int write_capsule_file(FILE *f, void *data, size_t size, const char *msg) 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 (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 @@ -168,23 +396,25 @@ static int write_capsule_file(FILE *f, void *data, size_t size, const char *msg) * * -1 - on failure */ static int create_fwbin(char *path, char *bin, efi_guid_t *guid, - unsigned long index, unsigned long instance) + unsigned long index, unsigned long instance, + uint64_t mcount, char *privkey_file, char *cert_file) { 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; - void *data; + uint8_t *data; off_t bin_size; - u64 offset; + uint64_t offset; int ret;

#ifdef DEBUG - printf("For output: %s\n", path); - printf("\tbin: %s\n\ttype: %pUl\n", bin, guid); - printf("\tindex: %ld\n\tinstance: %ld\n", index, instance); + 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; ret = -1; @@ -195,6 +425,27 @@ static int create_fwbin(char *path, char *bin, efi_guid_t *guid, if (read_bin_file(bin, &data, &bin_size)) goto err;

+ /* 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 = data; + 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 */ @@ -212,9 +463,12 @@ static int create_fwbin(char *path, char *bin, efi_guid_t *guid, /* TODO: The current implementation ignores flags */ header.flags = CAPSULE_FLAGS_PERSIST_ACROSS_RESET; header.capsule_image_size = sizeof(header) - + sizeof(capsule) + sizeof(u64) + + 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; @@ -230,7 +484,7 @@ static int create_fwbin(char *path, char *bin, efi_guid_t *guid, "Firmware capsule header")) goto err;

- offset = sizeof(capsule) + sizeof(u64); + offset = sizeof(capsule) + sizeof(uint64_t); if (write_capsule_file(f, &offset, sizeof(offset), "Offset to capsule image")) goto err; @@ -245,13 +499,32 @@ static int create_fwbin(char *path, char *bin, efi_guid_t *guid, 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 */ @@ -262,28 +535,43 @@ static int create_fwbin(char *path, char *bin, efi_guid_t *guid, err: if (f) fclose(f); + free_sig_data(&auth_context); free(data);

return ret; }

-/* - * Usage: - * $ mkeficapsule -f <firmware binary> <output file> +/** + * 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) { char *file; efi_guid_t *guid; unsigned long index, instance; + uint64_t mcount; + char *privkey_file, *cert_file; int c, idx;

file = NULL; guid = NULL; index = 0; instance = 0; + mcount = 0; + privkey_file = NULL; + cert_file = NULL; + dump_sig = 0; for (;;) { - c = getopt_long(argc, argv, "f:r:i:I:v:h", options, &idx); + c = getopt_long(argc, argv, opts_short, options, &idx); if (c == -1) break;

@@ -291,7 +579,7 @@ int main(int argc, char **argv) case 'f': if (file) { fprintf(stderr, "Image already specified\n"); - return -1; + exit(EXIT_FAILURE); } file = optarg; guid = &efi_guid_image_type_uboot_fit; @@ -299,7 +587,7 @@ int main(int argc, char **argv) case 'r': if (file) { fprintf(stderr, "Image already specified\n"); - return -1; + exit(EXIT_FAILURE); } file = optarg; guid = &efi_guid_image_type_uboot_raw; @@ -310,14 +598,38 @@ int main(int argc, char **argv) case 'I': instance = strtoul(optarg, NULL, 0); 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 'h': print_usage(); - return 0; + exit(EXIT_SUCCESS); } }

- /* need an output file */ - if (argc != optind + 1) { + /* check necessary parameters */ + if ((argc != optind + 1) || !file || + ((privkey_file && !cert_file) || + (!privkey_file && cert_file))) { print_usage(); exit(EXIT_FAILURE); } @@ -328,8 +640,8 @@ int main(int argc, char **argv) exit(EXIT_SUCCESS); }

- if (create_fwbin(argv[optind], file, guid, index, instance) - < 0) { + if (create_fwbin(argv[optind], file, guid, index, instance, + mcount, privkey_file, cert_file) < 0) { fprintf(stderr, "Creating firmware capsule failed\n"); exit(EXIT_FAILURE); }

Now we can use mkeficapsule command instead of EDK-II's script to create a signed capsule file. So update the instruction for capsule authentication.

Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org Reviewed-by: Simon Glass sjg@chromium.org Acked-by: Ilias Apalodimas ilias.apalodimas@linaro.org --- doc/develop/uefi/uefi.rst | 147 +++++++++++++++++++------------------- 1 file changed, 74 insertions(+), 73 deletions(-)

diff --git a/doc/develop/uefi/uefi.rst b/doc/develop/uefi/uefi.rst index 43fb10f7978e..7e1eb8256259 100644 --- a/doc/develop/uefi/uefi.rst +++ b/doc/develop/uefi/uefi.rst @@ -284,37 +284,56 @@ Support has been added for the UEFI capsule update feature which enables updating the U-Boot image using the UEFI firmware management protocol (FMP). The capsules are not passed to the firmware through the UpdateCapsule runtime service. Instead, capsule-on-disk -functionality is used for fetching the capsule from the EFI System -Partition (ESP) by placing the capsule file under the -\EFI\UpdateCapsule directory. - -The directory \EFI\UpdateCapsule is checked for capsules only within the -EFI system partition on the device specified in the active boot option -determined by reference to BootNext variable or BootOrder variable processing. -The active Boot Variable is the variable with highest priority BootNext or -within BootOrder that refers to a device found to be present. Boot variables -in BootOrder but referring to devices not present are ignored when determining -active boot variable. -Before starting a capsule update make sure your capsules are installed in the -correct ESP partition or set BootNext. +functionality is used for fetching capsules from the EFI System +Partition (ESP) by placing capsule files under the directory:: + + \EFI\UpdateCapsule + +The directory is checked for capsules only within the +EFI system partition on the device specified in the active boot option, +which is determined by BootXXXX variable in BootNext, or if not, the highest +priority one within BootOrder. Any BootXXXX variables referring to devices +not present are ignored when determining the active boot option. + +Please note that capsules will be applied in the alphabetic order of +capsule file names. + +Creating a capsule file +*********************** + +A capsule file can be created by using tools/mkeficapsule. +To build this tool, enable:: + + CONFIG_TOOLS_MKEFICAPSULE=y + CONFIG_TOOLS_LIBCRYPTO=y + +Run the following command:: + +.. code-block:: console + + $ mkeficapsule \ + --index 1 --instance 0 \ + [--fit <FIT image> | --raw <raw image>] \ + <capsule_file_name>

Performing the update *********************

-Since U-boot doesn't currently support SetVariable at runtime there's a Kconfig -option (CONFIG_EFI_IGNORE_OSINDICATIONS) to disable the OsIndications variable -check. If that option is enabled just copy your capsule to \EFI\UpdateCapsule. +Put capsule files under the directory mentioned above. +Then, following the UEFI specification, you'll need to set +the EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED +bit in OsIndications variable with::

-If that option is disabled, you'll need to set the OsIndications variable with:: +.. code-block:: console

=> setenv -e -nv -bs -rt -v OsIndications =0x04

-Finally, the capsule update can be initiated either by rebooting the board, -which is the preferred method, or by issuing the following command:: +Since U-boot doesn't currently support SetVariable at runtime, its value +won't be taken over across the reboot. If this is the case, you can skip +this feature check with the Kconfig option (CONFIG_EFI_IGNORE_OSINDICATIONS) +set.

- => efidebug capsule disk-update - -**The efidebug command is should only be used during debugging/development.** +Finally, the capsule update can be initiated by rebooting the board.

Enabling Capsule Authentication ******************************* @@ -324,82 +343,64 @@ be updated by verifying the capsule signature. The capsule signature is computed and prepended to the capsule payload at the time of capsule generation. This signature is then verified by using the public key stored as part of the X509 certificate. This certificate is -in the form of an efi signature list (esl) file, which is embedded as -part of U-Boot. +in the form of an efi signature list (esl) file, which is embedded in +a device tree.

The capsule authentication feature can be enabled through the following config, in addition to the configs listed above for capsule update::

CONFIG_EFI_CAPSULE_AUTHENTICATE=y - CONFIG_EFI_CAPSULE_KEY_PATH=<path to .esl cert>

The public and private keys used for the signing process are generated -and used by the steps highlighted below:: +and used by the steps highlighted below.

- 1. Install utility commands on your host - * OPENSSL +1. Install utility commands on your host + * openssl * efitools

- 2. Create signing keys and certificate files on your host +2. Create signing keys and certificate files on your host:: + +.. code-block:: console

$ openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=CRT/ \ -keyout CRT.key -out CRT.crt -nodes -days 365 $ cert-to-efi-sig-list CRT.crt CRT.esl

- $ openssl x509 -in CRT.crt -out CRT.cer -outform DER - $ openssl x509 -inform DER -in CRT.cer -outform PEM -out CRT.pub.pem - - $ openssl pkcs12 -export -out CRT.pfx -inkey CRT.key -in CRT.crt - $ openssl pkcs12 -in CRT.pfx -nodes -out CRT.pem - -The capsule file can be generated by using the GenerateCapsule.py -script in EDKII:: - - $ ./BaseTools/BinWrappers/PosixLike/GenerateCapsule -e -o \ - <capsule_file_name> --monotonic-count <val> --fw-version \ - <val> --lsv <val> --guid \ - e2bb9c06-70e9-4b14-97a3-5a7913176e3f --verbose \ - --update-image-index <val> --signer-private-cert \ - /path/to/CRT.pem --trusted-public-cert \ - /path/to/CRT.pub.pem --other-public-cert /path/to/CRT.pub.pem \ - <u-boot.bin> +3. Run the following command to create and sign the capsule file::

-Place the capsule generated in the above step on the EFI System -Partition under the EFI/UpdateCapsule directory +.. code-block:: console

-Testing on QEMU -*************** + $ mkeficapsule --monotonic-count 1 \ + --private-key CRT.key \ + --certificate CRT.crt \ + --index 1 --instance 0 \ + [--fit <FIT image> | --raw <raw image>] \ + <capsule_file_name>

-Currently, support has been added on the QEMU ARM64 virt platform for -updating the U-Boot binary as a raw image when the platform is booted -in non-secure mode, i.e. with CONFIG_TFABOOT disabled. For this -configuration, the QEMU platform needs to be booted with -'secure=off'. The U-Boot binary placed on the first bank of the NOR -flash at offset 0x0. The U-Boot environment is placed on the second -NOR flash bank at offset 0x4000000. +4. Insert the signature list into a device tree in the following format::

-The capsule update feature is enabled with the following configuration -settings:: + { + signature { + capsule-key = [ <binary of signature list> ]; + } + ... + }

- CONFIG_MTD=y - CONFIG_FLASH_CFI_MTD=y - CONFIG_CMD_MTDPARTS=y - CONFIG_CMD_DFU=y - CONFIG_DFU_MTD=y - CONFIG_PCI_INIT_R=y - CONFIG_EFI_CAPSULE_ON_DISK=y - CONFIG_EFI_CAPSULE_FIRMWARE_MANAGEMENT=y - CONFIG_EFI_CAPSULE_FIRMWARE=y - CONFIG_EFI_CAPSULE_FIRMWARE_RAW=y + You can do this manually with::

-In addition, the following config needs to be disabled(QEMU ARM specific):: +.. code-block:: console

- CONFIG_TFABOOT + $ dtc -@ -I dts -O dtb -o signature.dtbo signature.dts + $ fdtoverlay -i orig.dtb -o new.dtb -v signature.dtbo

-The capsule file can be generated by using the tools/mkeficapsule:: + where signature.dts looks like::

- $ mkeficapsule --raw <u-boot.bin> --index 1 <capsule_file_name> + &{/} { + signature { + capsule-key = /incbin/("CRT.esl"); + }; + };

Executing the boot manager ~~~~~~~~~~~~~~~~~~~~~~~~~~

The existing options, "--fit" and "--raw," are only used to put a proper GUID in a capsule header, where GUID identifies a particular FMP (Firmware Management Protocol) driver which then would handle the firmware binary in a capsule. In fact, mkeficapsule does the exact same job in creating a capsule file whatever the firmware binary type is.

To prepare for the future extension, the command syntax will be a bit modified to allow users to specify arbitrary GUID for their own FMP driver. OLD: [--fit <image> | --raw <image>] <capsule file> NEW: [--fit | --raw | --guid <guid-string>] <image> <capsule file>

Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org Reviewed-by: Simon Glass sjg@chromium.org --- doc/develop/uefi/uefi.rst | 4 +- doc/mkeficapsule.1 | 26 ++++++++---- tools/Makefile | 2 +- tools/mkeficapsule.c | 85 ++++++++++++++++++++++++++++----------- 4 files changed, 84 insertions(+), 33 deletions(-)

diff --git a/doc/develop/uefi/uefi.rst b/doc/develop/uefi/uefi.rst index 7e1eb8256259..a1a2afd60bbc 100644 --- a/doc/develop/uefi/uefi.rst +++ b/doc/develop/uefi/uefi.rst @@ -375,8 +375,8 @@ and used by the steps highlighted below. --private-key CRT.key \ --certificate CRT.crt \ --index 1 --instance 0 \ - [--fit <FIT image> | --raw <raw image>] \ - <capsule_file_name> + [--fit | --raw | --guid <guid-string] \ + <image_blob> <capsule_file_name>

4. Insert the signature list into a device tree in the following format::

diff --git a/doc/mkeficapsule.1 b/doc/mkeficapsule.1 index 680362f5c4e9..8babb27ee8b2 100644 --- a/doc/mkeficapsule.1 +++ b/doc/mkeficapsule.1 @@ -8,7 +8,7 @@ mkeficapsule - Generate EFI capsule file for U-Boot

.SH SYNOPSIS .B mkeficapsule -.RI [ options "] " capsule-file +.RI [ options "] " image-blob " " capsule-file

.SH "DESCRIPTION" .B mkeficapsule @@ -24,7 +24,7 @@ In this case, the update will be authenticated by verifying the signature before applying.

.B mkeficapsule -supports two different format of image files: +takes any type of image files, including: .TP .I raw image format is a single binary blob of any type of firmware. @@ -36,18 +36,30 @@ multiple binary blobs in a single capsule file. This type of image file can be generated by .BR mkimage .

+.PP +If you want to use other types than above two, you should explicitly +specify a guid for the FMP driver. + .SH "OPTIONS" One of -.BR --fit " or " --raw +.BR --fit ", " --raw " or " --guid option must be specified.

.TP -.BI "-f\fR,\fB --fit " fit-image-file -Specify a FIT image file +.BR -f ", " --fit +Indicate that the blob is a FIT image file

.TP -.BI "-r\fR,\fB --raw " raw-image-file -Specify a raw image file +.BR -r ", " --raw +Indicate that the blob is a raw image file + +.TP +.BI "-g\fR,\fB --guid " guid-string +Specify guid for image blob type. The format is: + xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx + +The first three elements are in little endian, while the rest +is in big endian.

.TP .BI "-i\fR,\fB --index " index diff --git a/tools/Makefile b/tools/Makefile index 8da07d60a755..5409ff2879c6 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -238,7 +238,7 @@ hostprogs-$(CONFIG_MIPS) += mips-relocs hostprogs-$(CONFIG_ASN1_COMPILER) += asn1_compiler HOSTCFLAGS_asn1_compiler.o = -idirafter $(srctree)/include

-HOSTLDLIBS_mkeficapsule += -lgnutls +HOSTLDLIBS_mkeficapsule += -lgnutls -luuid hostprogs-$(CONFIG_TOOLS_MKEFICAPSULE) += mkeficapsule

# We build some files with extra pedantic flags to try to minimize things diff --git a/tools/mkeficapsule.c b/tools/mkeficapsule.c index b996c66ad26a..7ff1f999db85 100644 --- a/tools/mkeficapsule.c +++ b/tools/mkeficapsule.c @@ -15,7 +15,7 @@

#include <sys/stat.h> #include <sys/types.h> - +#include <uuid/uuid.h> #include <linux/kconfig.h>

#include <gnutls/gnutls.h> @@ -33,11 +33,12 @@ efi_guid_t efi_guid_image_type_uboot_raw = EFI_FIRMWARE_IMAGE_TYPE_UBOOT_RAW_GUID; efi_guid_t efi_guid_cert_type_pkcs7 = EFI_CERT_TYPE_PKCS7_GUID;

-static const char *opts_short = "f:r:i:I:v:p:c:m:dh"; +static const char *opts_short = "frg:i:I:v:p:c:m:dh";

static struct option options[] = { - {"fit", required_argument, NULL, 'f'}, - {"raw", required_argument, NULL, 'r'}, + {"fit", no_argument, NULL, 'f'}, + {"raw", no_argument, NULL, 'r'}, + {"guid", required_argument, NULL, 'g'}, {"index", required_argument, NULL, 'i'}, {"instance", required_argument, NULL, 'I'}, {"private-key", required_argument, NULL, 'p'}, @@ -50,11 +51,12 @@ static struct option options[] = {

static void print_usage(void) { - printf("Usage: %s [options] <output file>\n" + fprintf(stderr, "Usage: %s [options] <image blob> <output file>\n" "Options:\n"

- "\t-f, --fit <fit image> new FIT image file\n" - "\t-r, --raw <raw image> new raw image file\n" + "\t-f, --fit FIT image type\n" + "\t-r, --raw raw image type\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-p, --private-key <privkey file> private key file\n" @@ -541,6 +543,37 @@ err: return ret; }

+/** + * convert_uuid_to_guid() - convert UUID to GUID + * @buf: UUID binary + * + * UUID and GUID have the same data structure, but their binary + * formats are different due to the endianness. See lib/uuid.c. + * Since uuid_parse() can handle only UUID, this function must + * be called to get correct data for GUID when parsing a string. + * + * The correct data will be returned in @buf. + */ +void convert_uuid_to_guid(unsigned char *buf) +{ + unsigned char c; + + c = buf[0]; + buf[0] = buf[3]; + buf[3] = c; + c = buf[1]; + buf[1] = buf[2]; + buf[2] = c; + + c = buf[4]; + buf[4] = buf[5]; + buf[5] = c; + + c = buf[6]; + buf[6] = buf[7]; + buf[7] = c; +} + /** * main - main entry function of mkeficapsule * @argc: Number of arguments @@ -555,14 +588,13 @@ err: */ int main(int argc, char **argv) { - char *file; efi_guid_t *guid; + unsigned char uuid_buf[16]; unsigned long index, instance; uint64_t mcount; char *privkey_file, *cert_file; int c, idx;

- file = NULL; guid = NULL; index = 0; instance = 0; @@ -577,21 +609,34 @@ int main(int argc, char **argv)

switch (c) { case 'f': - if (file) { - fprintf(stderr, "Image already specified\n"); + if (guid) { + fprintf(stderr, + "Image type already specified\n"); exit(EXIT_FAILURE); } - file = optarg; guid = &efi_guid_image_type_uboot_fit; break; case 'r': - if (file) { - fprintf(stderr, "Image already specified\n"); + if (guid) { + fprintf(stderr, + "Image type already specified\n"); exit(EXIT_FAILURE); } - file = optarg; guid = &efi_guid_image_type_uboot_raw; break; + case 'g': + if (guid) { + fprintf(stderr, + "Image type already specified\n"); + exit(EXIT_FAILURE); + } + if (uuid_parse(optarg, uuid_buf)) { + fprintf(stderr, "Wrong guid format\n"); + exit(EXIT_FAILURE); + } + convert_uuid_to_guid(uuid_buf); + guid = (efi_guid_t *)uuid_buf; + break; case 'i': index = strtoul(optarg, NULL, 0); break; @@ -627,20 +672,14 @@ int main(int argc, char **argv) }

/* check necessary parameters */ - if ((argc != optind + 1) || !file || + if ((argc != optind + 2) || !guid || ((privkey_file && !cert_file) || (!privkey_file && cert_file))) { print_usage(); exit(EXIT_FAILURE); }

- /* need a fit image file or raw image file */ - if (!file) { - print_usage(); - exit(EXIT_SUCCESS); - } - - if (create_fwbin(argv[optind], file, guid, index, instance, + if (create_fwbin(argv[argc - 1], argv[argc - 2], guid, index, instance, mcount, privkey_file, cert_file) < 0) { fprintf(stderr, "Creating firmware capsule failed\n"); exit(EXIT_FAILURE);

Since the syntax of mkeficapsule was changed in the previous commit, we need to modify command line arguments in a pytest script.

Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org Reviewed-by: Simon Glass sjg@chromium.org --- test/py/tests/test_efi_capsule/conftest.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/py/tests/test_efi_capsule/conftest.py b/test/py/tests/test_efi_capsule/conftest.py index 27c05971ca32..a5a25c53dcb4 100644 --- a/test/py/tests/test_efi_capsule/conftest.py +++ b/test/py/tests/test_efi_capsule/conftest.py @@ -80,10 +80,10 @@ def efi_capsule_data(request, u_boot_config): check_call('cd %s; %s/tools/mkimage -f uboot_bin_env.its uboot_bin_env.itb' % (data_dir, u_boot_config.build_dir), shell=True) - check_call('cd %s; %s/tools/mkeficapsule --fit uboot_bin_env.itb --index 1 Test01' % + check_call('cd %s; %s/tools/mkeficapsule --index 1 --fit uboot_bin_env.itb Test01' % (data_dir, u_boot_config.build_dir), shell=True) - check_call('cd %s; %s/tools/mkeficapsule --raw u-boot.bin.new --index 1 Test02' % + check_call('cd %s; %s/tools/mkeficapsule --index 1 --raw u-boot.bin.new Test02' % (data_dir, u_boot_config.build_dir), shell=True) if capsule_auth_enabled:

Before the capsule authentication is supported, this test script works correctly, but with the feature enabled, most tests will fail due to unsigned capsules. So check the results depending on CAPSULE_AUTHENTICATE or not.

Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org Reviewed-by: Simon Glass sjg@chromium.org --- .../test_efi_capsule/test_capsule_firmware.py | 26 ++++++++++++++++--- 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/test/py/tests/test_efi_capsule/test_capsule_firmware.py b/test/py/tests/test_efi_capsule/test_capsule_firmware.py index 9cc973560fa1..6e803f699f2f 100644 --- a/test/py/tests/test_efi_capsule/test_capsule_firmware.py +++ b/test/py/tests/test_efi_capsule/test_capsule_firmware.py @@ -148,6 +148,8 @@ class TestEfiCapsuleFirmwareFit(object):

capsule_early = u_boot_config.buildconfig.get( 'config_efi_capsule_on_disk_early') + capsule_auth = u_boot_config.buildconfig.get( + 'config_efi_capsule_authenticate') with u_boot_console.log.section('Test Case 2-b, after reboot'): if not capsule_early: # make sure that dfu_alt_info exists even persistent variables @@ -171,12 +173,18 @@ class TestEfiCapsuleFirmwareFit(object): 'sf probe 0:0', 'sf read 4000000 100000 10', 'md.b 4000000 10']) - assert 'u-boot:New' in ''.join(output) + if capsule_auth: + assert 'u-boot:Old' in ''.join(output) + else: + assert 'u-boot:New' in ''.join(output)

output = u_boot_console.run_command_list([ 'sf read 4000000 150000 10', 'md.b 4000000 10']) - assert 'u-boot-env:New' in ''.join(output) + if capsule_auth: + assert 'u-boot-env:Old' in ''.join(output) + else: + assert 'u-boot-env:New' in ''.join(output)

def test_efi_capsule_fw3( self, u_boot_config, u_boot_console, efi_capsule_data): @@ -215,6 +223,8 @@ class TestEfiCapsuleFirmwareFit(object):

capsule_early = u_boot_config.buildconfig.get( 'config_efi_capsule_on_disk_early') + capsule_auth = u_boot_config.buildconfig.get( + 'config_efi_capsule_authenticate') with u_boot_console.log.section('Test Case 3-b, after reboot'): if not capsule_early: # make sure that dfu_alt_info exists even persistent variables @@ -246,7 +256,10 @@ class TestEfiCapsuleFirmwareFit(object): 'sf probe 0:0', 'sf read 4000000 100000 10', 'md.b 4000000 10']) - assert 'u-boot:New' in ''.join(output) + if capsule_auth: + assert 'u-boot:Old' in ''.join(output) + else: + assert 'u-boot:New' in ''.join(output)

def test_efi_capsule_fw4( self, u_boot_config, u_boot_console, efi_capsule_data): @@ -285,6 +298,8 @@ class TestEfiCapsuleFirmwareFit(object):

capsule_early = u_boot_config.buildconfig.get( 'config_efi_capsule_on_disk_early') + capsule_auth = u_boot_config.buildconfig.get( + 'config_efi_capsule_authenticate') with u_boot_console.log.section('Test Case 4-b, after reboot'): if not capsule_early: # make sure that dfu_alt_info exists even persistent variables @@ -313,4 +328,7 @@ class TestEfiCapsuleFirmwareFit(object): 'sf probe 0:0', 'sf read 4000000 100000 10', 'md.b 4000000 10']) - assert 'u-boot:New' in ''.join(output) + if capsule_auth: + assert 'u-boot:Old' in ''.join(output) + else: + assert 'u-boot:New' in ''.join(output)