Add support for uefi capsule authentication feature for the qemu arm64
platform. This feature is enabled by setting the environment variable
"capsule_authentication_enabled".
The following configs are needed for enabling uefi capsule update and
capsule authentication features on the platform.
CONFIG_EFI_CAPSULE_ON_DISK=y
CONFIG_EFI_FIRMWARE_MANAGEMENT_PROTOCOL=y
CONFIG_EFI_CAPSULE_AUTHENTICATE=y
Signed-off-by: Sughosh Ganu <sughosh.g...@linaro.org>
---
board/emulation/qemu-arm/qemu_efi_fmp.c | 49 +++++++++++++++++++++----
1 file changed, 41 insertions(+), 8 deletions(-)
diff --git a/board/emulation/qemu-arm/qemu_efi_fmp.c
b/board/emulation/qemu-arm/qemu_efi_fmp.c
index 9baea94e6c..b58843f8fb 100644
--- a/board/emulation/qemu-arm/qemu_efi_fmp.c
+++ b/board/emulation/qemu-arm/qemu_efi_fmp.c
@@ -101,9 +101,15 @@ static efi_status_t EFIAPI qemu_arm64_fmp_get_image_info(
image_info[0].size = 0;
image_info[0].attributes_supported =
- EFI_IMAGE_ATTRIBUTE_IMAGE_UPDATABLE;
+ EFI_IMAGE_ATTRIBUTE_IMAGE_UPDATABLE |
+ EFI_IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED;
image_info[0].attributes_setting = EFI_IMAGE_ATTRIBUTE_IMAGE_UPDATABLE;
+ /* Check if the capsule authentication is enabled */
+ if (env_get("capsule_authentication_enabled"))
+ image_info[0].attributes_setting |=
+ EFI_IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED;
+
image_info[0].lowest_supported_image_version = 1;
image_info[0].last_attempt_version = 0;
image_info[0].last_attempt_status = LAST_ATTEMPT_STATUS_SUCCESS;
@@ -142,17 +148,12 @@ static efi_status_t EFIAPI qemu_arm64_fmp_set_image(
long fd, ret;
efi_status_t status = EFI_SUCCESS;
char *mode = "w+b";
+ void *capsule_payload;
+ efi_uintn_t capsule_payload_size;
EFI_ENTRY("%p %d %p %ld %p %p %p\n", this, image_index, image,
image_size, vendor_code, progress, abort_reason);
- /*
- * Put a hack here to offset the size of
- * the FMP_PAYLOAD_HEADER that gets added
- * by the GenerateCapsule script in edk2.
- */
- image += 0x10;
- image_size -= 0x10;
/* Do all the sanity checks first */
if (!image) {
@@ -170,6 +171,38 @@ static efi_status_t EFIAPI qemu_arm64_fmp_set_image(
goto back;
}
+ /* Authenticate the capsule if authentication enabled */
+ if (IS_ENABLED(CONFIG_EFI_CAPSULE_AUTHENTICATE) &&
+ env_get("capsule_authentication_enabled")) {
+ capsule_payload = NULL;
+ capsule_payload_size = 0;
+ status = efi_capsule_authenticate(image, image_size,
+ &capsule_payload,
+ &capsule_payload_size);
+
+ if (status == EFI_SECURITY_VIOLATION) {
+ printf("Capsule authentication check failed. Aborting
update\n");
+ goto back;
+ } else if (status != EFI_SUCCESS) {
+ goto back;
+ }
+
+ debug("Capsule authentication successfull\n");
+ image = capsule_payload;
+ image_size = capsule_payload_size;
+ } else {
+ debug("Capsule authentication disabled. ");
+ debug("Updating capsule without authenticating.\n");
+ }
+
+ /*
+ * Put a hack here to offset the size of
+ * the FMP_PAYLOAD_HEADER that gets added
+ * by the GenerateCapsule script in edk2.
+ */
+ image += 0x10;
+ image_size -= 0x10;
+
/* Do the update */
fd = smh_open(UBOOT_FILE, mode);
if (fd == -1) {
--
2.17.1
