[PATCH v8 07/12] tools: mkeficapsule: allow for specifying GUID explicitly
AKASHI Takahiro
takahiro.akashi at linaro.org
Mon Dec 20 06:02:48 CET 2021
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 at linaro.org>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
doc/develop/uefi/uefi.rst | 4 +-
doc/mkeficapsule.1 | 26 +++++++++----
tools/Makefile | 1 +
tools/mkeficapsule.c | 78 ++++++++++++++++++++++++++++++---------
4 files changed, 82 insertions(+), 27 deletions(-)
diff --git a/doc/develop/uefi/uefi.rst b/doc/develop/uefi/uefi.rst
index 864d61734bee..54fefd76f0f5 100644
--- a/doc/develop/uefi/uefi.rst
+++ b/doc/develop/uefi/uefi.rst
@@ -367,8 +367,8 @@ 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 837e09ab451e..312e8a8b3188 100644
--- a/doc/mkeficapsule.1
+++ b/doc/mkeficapsule.1
@@ -5,7 +5,7 @@ mkeficapsule \- Generate EFI capsule file for U-Boot
.SH SYNOPSIS
.B mkeficapsule
-.RB [\fIoptions\fP] " \fIcapsule-file\fP"
+.RB [\fIoptions\fP] " \fIimage-blob\fP \fIcapsule-file\fP"
.SH "DESCRIPTION"
The
@@ -21,7 +21,7 @@ Optionally, a capsule file can be signed with a given private key.
In this case, the update will be authenticated by verifying the signature
before applying.
-\fBmkeficapsule\fP supports two different format of image files:
+\fBmkeficapsule\fP takes any type of image files, including:
.TP
.I raw image
format is a single binary blob of any type of firmware.
@@ -33,16 +33,28 @@ is the same as used in the new \fIuImage\fP format and allows for
multiple binary blobs in a single capsule file.
This type of image file can be generated by \fBmkimage\fP.
+.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 \fB--fit\fP or \fB--raw\fP option must be specified.
+One of \fB--fit\fP, \fB--raw\fP or \fB--guid\fP option must be specified.
.TP
-.BI "-f, --fit \fIfit-image-file\fP"
-Specify a FIT image file
+.BI "-f, --fit
+Indicate that the blob is a FIT image file
.TP
-.BI "-r, --raw \fIraw-image-file\fP"
-Specify a raw image file
+.BI "-r, --raw
+Indicate that the blob is a raw image file
+
+.TP
+.BI "-g, --guid \fIguid-string\fP"
+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, --index \fIindex\fP"
diff --git a/tools/Makefile b/tools/Makefile
index afca08e2941a..cbf83a252caa 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -242,6 +242,7 @@ ifeq ($(CONFIG_TOOLS_LIBCRYPTO),y)
HOSTLDLIBS_mkeficapsule += \
$(shell pkg-config --libs libssl libcrypto 2> /dev/null || echo "-lssl -lcrypto")
endif
+HOSTLDLIBS_mkeficapsule += -luuid
hostprogs-$(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 3e6f36430d74..8891496d1564 100644
--- a/tools/mkeficapsule.c
+++ b/tools/mkeficapsule.c
@@ -14,7 +14,7 @@
#include <sys/stat.h>
#include <sys/types.h>
-
+#include <uuid/uuid.h>
#include <linux/kconfig.h>
#ifdef CONFIG_TOOLS_LIBCRYPTO
#include <openssl/asn1.h>
@@ -37,14 +37,15 @@ efi_guid_t efi_guid_image_type_uboot_raw =
efi_guid_t efi_guid_cert_type_pkcs7 = EFI_CERT_TYPE_PKCS7_GUID;
#ifdef CONFIG_TOOLS_LIBCRYPTO
-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";
#else
-static const char *opts_short = "f:r:i:I:v:h";
+static const char *opts_short = "frg:i:I:v:h";
#endif
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'},
#ifdef CONFIG_TOOLS_LIBCRYPTO
@@ -59,11 +60,12 @@ static struct option options[] = {
static void print_usage(void)
{
- printf("Usage: %s [options] <output file>\n"
+ printf("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"
#ifdef CONFIG_TOOLS_LIBCRYPTO
@@ -563,6 +565,37 @@ err:
return ret;
}
+/**
+ * convert_uuid_to_guid() - convert uuid string to guid string
+ * @buf: String for UUID
+ *
+ * UUID and GUID have the same data structure, but their string
+ * 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
@@ -577,14 +610,13 @@ 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;
@@ -599,21 +631,31 @@ int main(int argc, char **argv)
switch (c) {
case 'f':
- if (file) {
- printf("Image already specified\n");
+ if (guid) {
+ printf("Image type already specified\n");
exit(EXIT_FAILURE);
}
- file = optarg;
guid = &efi_guid_image_type_uboot_fit;
break;
case 'r':
- if (file) {
- printf("Image already specified\n");
+ if (guid) {
+ printf("Image type already specified\n");
exit(EXIT_FAILURE);
}
- file = optarg;
guid = &efi_guid_image_type_uboot_raw;
break;
+ case 'g':
+ if (guid) {
+ printf("Image type already specified\n");
+ exit(EXIT_FAILURE);
+ }
+ if (uuid_parse(optarg, uuid_buf)) {
+ printf("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;
@@ -649,14 +691,14 @@ 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);
}
- 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) {
printf("Creating firmware capsule failed\n");
exit(EXIT_FAILURE);
--
2.33.0
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