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Index: stand/common/bootstrap.h
===================================================================
--- stand/common/bootstrap.h
+++ stand/common/bootstrap.h
@@ -33,6 +33,10 @@
#include <sys/queue.h>
#include <sys/linker_set.h>
+#ifdef SECURE_BOOT
+#include <bearssl.h>
+#endif
+
/* Commands and return values; nonzero return sets command_errmsg != NULL */
typedef int (bootblk_cmd_t)(int argc, char *argv[]);
#define COMMAND_ERRBUFSZ (256)
@@ -332,6 +336,19 @@
/* For kexec-type loaders, get ksegment structure */
void (*arch_kexec_kseg_get)(int *nseg, void **kseg);
+#ifdef SECURE_BOOT
+ /*
+ * Check if we should verify anything.
+ * 0 - Secure boot disabled,
+ * 1 - enabled
+ */
+ int (*secure_boot_enabled)(void);
+ /* Return an array of x509 CAs */
+ br_x509_certificate* (*secure_boot_get_CAs)(size_t *count);
+ br_x509_certificate* (*secure_boot_get_forbidden_CAs)(size_t *count);
+ /* Check if the DER encoded TBS part of X509 certificate is forbidden */
+ int (*secure_boot_cert_forbidden)(const char*, size_t);
+#endif
};
extern struct arch_switch archsw;
Index: stand/common/module.c
===================================================================
--- stand/common/module.c
+++ stand/common/module.c
@@ -41,6 +41,10 @@
#include "bootstrap.h"
+#ifdef SECURE_BOOT
+#include "verify.h"
+#endif
+
#define MDIR_REMOVED 0x0001
#define MDIR_NOHINTS 0x0002
@@ -428,6 +432,11 @@
return(NULL);
}
+#ifdef SECURE_BOOT
+ if (verify(name) != 0)
+ return (NULL);
+#endif
+
if ((fd = open(name, O_RDONLY)) < 0) {
snprintf(command_errbuf, sizeof(command_errbuf),
"can't open '%s': %s", name, strerror(errno));
@@ -552,6 +561,12 @@
last_file = last_file->f_next)
;
+#ifdef SECURE_BOOT
+ err = verify(filename);
+ if (err != 0)
+ return (err);
+#endif
+
do {
err = file_load(filename, loadaddr, &fp);
if (err)
Index: stand/common/verify.h
===================================================================
--- /dev/null
+++ stand/common/verify.h
@@ -0,0 +1,6 @@
+#ifndef VERIFY_H
+#define VERIFY_H
+
+int verify(const char*);
+
+#endif /* VERIFY_H */
Index: stand/common/verify.c
===================================================================
--- /dev/null
+++ stand/common/verify.c
@@ -0,0 +1,227 @@
+/*-
+ * Copyright (c) 2019 Stormshield.
+ * Copyright (c) 2019 Semihalf.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stand.h>
+#include <secureboot.h>
+
+#include "bootstrap.h"
+#include "verify.h"
+
+int
+verify(const char *path)
+{
+ struct signature_info header;
+ unsigned char digest[br_sha256_SIZE];
+ unsigned char decrypted_digest[br_sha256_SIZE];
+ unsigned char *signature;
+ size_t tbs_size;
+ int result = 0;
+ ssize_t read_result;
+ int fd;
+
+ size_t trusted_count;
+ br_x509_certificate cert;
+ unsigned char *tbs_cert;
+ br_x509_certificate *trusted_certs;
+ br_x509_pkey *pkey;
+ br_rsa_pkcs1_vrfy vrfy_fp;
+
+ signature = NULL;
+ cert.data = NULL;
+
+ if (archsw.secure_boot_enabled == NULL) {
+ printf("archsw.secure_boot_enabled == NULL\n");
+ return (EINVAL);
+ }
+
+ result = archsw.secure_boot_enabled();
+
+ /*
+ * 0 - SecureBoot disabled,
+ * 1 - enabled,
+ * any other value - error
+ */
+ if (result == 0)
+ return (0);
+
+ if (result != 1)
+ return (EINVAL);
+
+ if (archsw.secure_boot_get_CAs == NULL) {
+ printf("archsw.secure_boot_getCAs == NULL\n");
+ return (EINVAL);
+ }
+ if (archsw.secure_boot_get_forbidden_CAs == NULL) {
+ printf("archsw.secure_boot_get_forbidden_CAs == NULL\n");
+ return (EINVAL);
+ }
+ if (archsw.secure_boot_cert_forbidden == NULL) {
+ printf("archsw.secure_boot_cert_forbidden == NULL\n");
+ return (EINVAL);
+ }
+
+ /*
+ * XXX: Opening and closing a file causes a memory leak of 4kB
+ */
+ fd = open(path, O_RDONLY);
+
+ /*
+ * The structure with information about the signature
+ * is simply appended to the binary file.
+ */
+ lseek(fd, sizeof(header), SEEK_END);
+ read_result = checked_read(fd, (char *)&header, sizeof(header));
+ if (read_result != sizeof(header)) {
+ printf("Failed to read header\n");
+ result = errno;
+ goto out;
+ }
+
+ if (header.magic != MAGIC) {
+ printf("Bad signature magic\n");
+ result = EINVAL;
+ goto out;
+ }
+
+ /*
+ * Check if the sizes are sane.
+ */
+ if (header.signature_size > 4096 || header.cert_size > 4096) {
+ result = EINVAL;
+ goto out;
+ }
+
+ lseek(fd, header.kernel_size, SEEK_SET);
+ signature = malloc(header.signature_size);
+ cert.data = malloc(header.cert_size);
+ if (signature == NULL || cert.data == NULL) {
+ printf("Failed to allocate memory\n");
+ result = ENOMEM;
+ goto out;
+ }
+
+ cert.data_len = header.cert_size;
+ read_result = checked_read(fd, signature, header.signature_size);
+ if (read_result != header.signature_size) {
+ printf("Failed to read signature\n");
+ result = errno;
+ goto out;
+ }
+ read_result = checked_read(fd, cert.data, header.cert_size);
+ if (read_result != header.cert_size) {
+ printf("Failed to read X509 certificate\n");
+ result = errno;
+ goto out;
+ }
+
+ /*
+ * Check if the certificate is blacklisted.
+ */
+ tbs_cert = X509_to_tbs(cert.data, &tbs_size);
+ result = archsw.secure_boot_cert_forbidden(tbs_cert, tbs_size);
+ if (result != 0) {
+ printf("Certificate is forbidden\n");
+ goto out;
+ }
+
+ /*
+ * Check if CA that was used to sign the certificate
+ * is on the forbidden list.
+ */
+ trusted_certs = archsw.secure_boot_get_forbidden_CAs(&trusted_count);
+ if (trusted_certs != NULL) {
+ pkey = verify_cert(&cert, trusted_certs, trusted_count);
+ free_certs(trusted_certs, trusted_count);
+ if (pkey != NULL) {
+ printf("Certificate is forbidden\n");
+ result = EACCES;
+ goto out;
+ }
+ }
+
+ /*
+ * Verify if we trust the embedded certificate.
+ */
+ trusted_certs = archsw.secure_boot_get_CAs(&trusted_count);
+ if (trusted_certs == NULL) {
+ printf("Invalid CA count\n");
+ result = EINVAL;
+ goto out;
+ }
+ pkey = verify_cert(&cert, trusted_certs, trusted_count);
+ free_certs(trusted_certs, trusted_count);
+ if (pkey == NULL) {
+ printf("Failed to verify certificate\n");
+ result = EACCES;
+ goto out;
+ }
+
+ /*
+ * Decode encrypted digest using public key
+ * of the embedded certificate.
+ */
+ vrfy_fp = br_rsa_pkcs1_vrfy_get_default();
+ result = vrfy_fp(signature, header.signature_size,
+ BR_HASH_OID_SHA256, br_sha256_SIZE,
+ &pkey->key.rsa, decrypted_digest);
+ free_pkey(pkey);
+ free(pkey);
+ if (result != 1) {
+ printf("Failed to decode signature\n");
+ result = EINVAL;
+ goto out;
+ }
+
+ /*
+ * Calculate digest, excluding the signature
+ * and compare it against what we have just decoded.
+ */
+ lseek(fd, 0, SEEK_SET);
+ result = gen_digest(fd, header.kernel_size, digest);
+ if (result != 0) {
+ printf("Failed to hash the binary\n");
+ goto out;
+ }
+ if (memcmp(digest, decrypted_digest, br_sha256_SIZE) != 0) {
+ printf("Decoded hash doesn't match\n");
+ result = EACCES;
+ goto out;
+ } else
+ result = 0;
+
+out:
+ if (signature != NULL)
+ free(signature);
+ if (cert.data != NULL)
+ free(cert.data);
+
+ close(fd);
+ return (result);
+}
Index: stand/defs.mk
===================================================================
--- stand/defs.mk
+++ stand/defs.mk
@@ -174,6 +174,12 @@
.endif
LOADER_INTERP?=${LOADER_DEFAULT_INTERP}
+# Secure Boot
+.if ${MK_SECUREBOOT} == "yes"
+.include "${SRCTOP}/lib/libbearssl/Makefile.inc"
+.include "${SRCTOP}/lib/libsecureboot/Makefile.inc"
+.endif
+
# Make sure we use the machine link we're about to create
CFLAGS+=-I.
Index: stand/efi/include/Guid/GlobalVariable.h
===================================================================
--- /dev/null
+++ stand/efi/include/Guid/GlobalVariable.h
@@ -0,0 +1,193 @@
+/* $FreeBSD$ */
+/** @file
+ GUID for EFI (NVRAM) Variables.
+
+ Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ @par Revision Reference:
+ GUID defined in UEFI 2.1
+**/
+
+#ifndef __GLOBAL_VARIABLE_GUID_H__
+#define __GLOBAL_VARIABLE_GUID_H__
+
+#define EFI_GLOBAL_VARIABLE \
+ { \
+ 0x8BE4DF61, 0x93CA, 0x11d2, {0xAA, 0x0D, 0x00, 0xE0, 0x98, 0x03, 0x2B, 0x8C } \
+ }
+
+extern EFI_GUID gEfiGlobalVariableGuid;
+
+//
+// Follow UEFI 2.4 spec:
+// To prevent name collisions with possible future globally defined variables,
+// other internal firmware data variables that are not defined here must be
+// saved with a unique VendorGuid other than EFI_GLOBAL_VARIABLE or
+// any other GUID defined by the UEFI Specification. Implementations must
+// only permit the creation of variables with a UEFI Specification-defined
+// VendorGuid when these variables are documented in the UEFI Specification.
+//
+// Note: except the globally defined variables defined below, the spec also defines
+// L"Boot####" - A boot load option.
+// L"Driver####" - A driver load option.
+// L"SysPrep####" - A System Prep application load option.
+// L"Key####" - Describes hot key relationship with a Boot#### load option.
+// The attribute for them is NV+BS+RT, #### is a printed hex value, and no 0x or h
+// is included in the hex value. They can not be expressed as a #define like other globally
+// defined variables, it is because we can not list the Boot0000, Boot0001, etc one by one.
+//
+
+///
+/// The language codes that the firmware supports. This value is deprecated.
+/// Its attribute is BS+RT.
+///
+#define EFI_LANG_CODES_VARIABLE_NAME L"LangCodes"
+///
+/// The language code that the system is configured for. This value is deprecated.
+/// Its attribute is NV+BS+RT.
+///
+#define EFI_LANG_VARIABLE_NAME L"Lang"
+///
+/// The firmware's boot managers timeout, in seconds, before initiating the default boot selection.
+/// Its attribute is NV+BS+RT.
+///
+#define EFI_TIME_OUT_VARIABLE_NAME L"Timeout"
+///
+/// The language codes that the firmware supports.
+/// Its attribute is BS+RT.
+///
+#define EFI_PLATFORM_LANG_CODES_VARIABLE_NAME L"PlatformLangCodes"
+///
+/// The language code that the system is configured for.
+/// Its attribute is NV+BS+RT.
+///
+#define EFI_PLATFORM_LANG_VARIABLE_NAME L"PlatformLang"
+///
+/// The device path of the default input/output/error output console.
+/// Its attribute is NV+BS+RT.
+///
+#define EFI_CON_IN_VARIABLE_NAME L"ConIn"
+#define EFI_CON_OUT_VARIABLE_NAME L"ConOut"
+#define EFI_ERR_OUT_VARIABLE_NAME L"ErrOut"
+///
+/// The device path of all possible input/output/error output devices.
+/// Its attribute is BS+RT.
+///
+#define EFI_CON_IN_DEV_VARIABLE_NAME L"ConInDev"
+#define EFI_CON_OUT_DEV_VARIABLE_NAME L"ConOutDev"
+#define EFI_ERR_OUT_DEV_VARIABLE_NAME L"ErrOutDev"
+///
+/// The ordered boot option load list.
+/// Its attribute is NV+BS+RT.
+///
+#define EFI_BOOT_ORDER_VARIABLE_NAME L"BootOrder"
+///
+/// The boot option for the next boot only.
+/// Its attribute is NV+BS+RT.
+///
+#define EFI_BOOT_NEXT_VARIABLE_NAME L"BootNext"
+///
+/// The boot option that was selected for the current boot.
+/// Its attribute is BS+RT.
+///
+#define EFI_BOOT_CURRENT_VARIABLE_NAME L"BootCurrent"
+///
+/// The types of boot options supported by the boot manager. Should be treated as read-only.
+/// Its attribute is BS+RT.
+///
+#define EFI_BOOT_OPTION_SUPPORT_VARIABLE_NAME L"BootOptionSupport"
+///
+/// The ordered driver load option list.
+/// Its attribute is NV+BS+RT.
+///
+#define EFI_DRIVER_ORDER_VARIABLE_NAME L"DriverOrder"
+///
+/// The ordered System Prep Application load option list.
+/// Its attribute is NV+BS+RT.
+///
+#define EFI_SYS_PREP_ORDER_VARIABLE_NAME L"SysPrepOrder"
+///
+/// Identifies the level of hardware error record persistence
+/// support implemented by the platform. This variable is
+/// only modified by firmware and is read-only to the OS.
+/// Its attribute is NV+BS+RT.
+///
+#define EFI_HW_ERR_REC_SUPPORT_VARIABLE_NAME L"HwErrRecSupport"
+///
+/// Whether the system is operating in setup mode (1) or not (0).
+/// All other values are reserved. Should be treated as read-only.
+/// Its attribute is BS+RT.
+///
+#define EFI_SETUP_MODE_NAME L"SetupMode"
+///
+/// The Key Exchange Key Signature Database.
+/// Its attribute is NV+BS+RT+AT.
+///
+#define EFI_KEY_EXCHANGE_KEY_NAME L"KEK"
+///
+/// The public Platform Key.
+/// Its attribute is NV+BS+RT+AT.
+///
+#define EFI_PLATFORM_KEY_NAME L"PK"
+///
+/// Array of GUIDs representing the type of signatures supported
+/// by the platform firmware. Should be treated as read-only.
+/// Its attribute is BS+RT.
+///
+#define EFI_SIGNATURE_SUPPORT_NAME L"SignatureSupport"
+///
+/// Whether the platform firmware is operating in Secure boot mode (1) or not (0).
+/// All other values are reserved. Should be treated as read-only.
+/// Its attribute is BS+RT.
+///
+#define EFI_SECURE_BOOT_MODE_NAME L"SecureBoot"
+///
+/// The OEM's default Key Exchange Key Signature Database. Should be treated as read-only.
+/// Its attribute is BS+RT.
+///
+#define EFI_KEK_DEFAULT_VARIABLE_NAME L"KEKDefault"
+///
+/// The OEM's default public Platform Key. Should be treated as read-only.
+/// Its attribute is BS+RT.
+///
+#define EFI_PK_DEFAULT_VARIABLE_NAME L"PKDefault"
+///
+/// The OEM's default secure boot signature store. Should be treated as read-only.
+/// Its attribute is BS+RT.
+///
+#define EFI_DB_DEFAULT_VARIABLE_NAME L"dbDefault"
+///
+/// The OEM's default secure boot blacklist signature store. Should be treated as read-only.
+/// Its attribute is BS+RT.
+///
+#define EFI_DBX_DEFAULT_VARIABLE_NAME L"dbxDefault"
+///
+/// The OEM's default secure boot timestamp signature store. Should be treated as read-only.
+/// Its attribute is BS+RT.
+///
+#define EFI_DBT_DEFAULT_VARIABLE_NAME L"dbtDefault"
+///
+/// Allows the firmware to indicate supported features and actions to the OS.
+/// Its attribute is BS+RT.
+///
+#define EFI_OS_INDICATIONS_SUPPORT_VARIABLE_NAME L"OsIndicationsSupported"
+///
+/// Allows the OS to request the firmware to enable certain features and to take certain actions.
+/// Its attribute is NV+BS+RT.
+///
+#define EFI_OS_INDICATIONS_VARIABLE_NAME L"OsIndications"
+///
+/// Whether the system is configured to use only vendor provided
+/// keys or not. Should be treated as read-only.
+/// Its attribute is BS+RT.
+///
+#define EFI_VENDOR_KEYS_VARIABLE_NAME L"VendorKeys"
+
+#endif
Index: stand/efi/include/Guid/ImageAuthentication.h
===================================================================
--- /dev/null
+++ stand/efi/include/Guid/ImageAuthentication.h
@@ -0,0 +1,353 @@
+/* $FreeBSD$ */
+/** @file
+ Image signature database are defined for the signed image validation.
+
+ Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ @par Revision Reference:
+ GUIDs defined in UEFI 2.5 spec.
+**/
+
+#ifndef __IMAGE_AUTHTICATION_H__
+#define __IMAGE_AUTHTICATION_H__
+
+#include <Guid/GlobalVariable.h>
+#include <Protocol/Hash.h>
+
+#define EFI_IMAGE_SECURITY_DATABASE_GUID \
+ { \
+ 0xd719b2cb, 0x3d3a, 0x4596, { 0xa3, 0xbc, 0xda, 0xd0, 0xe, 0x67, 0x65, 0x6f } \
+ }
+
+///
+/// Varialbe name with guid EFI_IMAGE_SECURITY_DATABASE_GUID
+/// for the authorized signature database.
+///
+#define EFI_IMAGE_SECURITY_DATABASE L"db"
+///
+/// Varialbe name with guid EFI_IMAGE_SECURITY_DATABASE_GUID
+/// for the forbidden signature database.
+///
+#define EFI_IMAGE_SECURITY_DATABASE1 L"dbx"
+///
+/// Variable name with guid EFI_IMAGE_SECURITY_DATABASE_GUID
+/// for the timestamp signature database.
+///
+#define EFI_IMAGE_SECURITY_DATABASE2 L"dbt"
+
+#define SECURE_BOOT_MODE_ENABLE 1
+#define SECURE_BOOT_MODE_DISABLE 0
+
+#define SETUP_MODE 1
+#define USER_MODE 0
+
+//***********************************************************************
+// Signature Database
+//***********************************************************************
+///
+/// The format of a signature database.
+///
+#pragma pack(1)
+
+typedef struct {
+ ///
+ /// An identifier which identifies the agent which added the signature to the list.
+ ///
+ EFI_GUID SignatureOwner;
+ ///
+ /// The format of the signature is defined by the SignatureType.
+ ///
+ UINT8 SignatureData[1];
+} EFI_SIGNATURE_DATA;
+
+typedef struct {
+ ///
+ /// Type of the signature. GUID signature types are defined in below.
+ ///
+ EFI_GUID SignatureType;
+ ///
+ /// Total size of the signature list, including this header.
+ ///
+ UINT32 SignatureListSize;
+ ///
+ /// Size of the signature header which precedes the array of signatures.
+ ///
+ UINT32 SignatureHeaderSize;
+ ///
+ /// Size of each signature.
+ ///
+ UINT32 SignatureSize;
+ ///
+ /// Header before the array of signatures. The format of this header is specified
+ /// by the SignatureType.
+ /// UINT8 SignatureHeader[SignatureHeaderSize];
+ ///
+ /// An array of signatures. Each signature is SignatureSize bytes in length.
+ /// EFI_SIGNATURE_DATA Signatures[][SignatureSize];
+ ///
+} EFI_SIGNATURE_LIST;
+
+typedef struct {
+ ///
+ /// The SHA256 hash of an X.509 certificate's To-Be-Signed contents.
+ ///
+ EFI_SHA256_HASH ToBeSignedHash;
+ ///
+ /// The time that the certificate shall be considered to be revoked.
+ ///
+ EFI_TIME TimeOfRevocation;
+} EFI_CERT_X509_SHA256;
+
+typedef struct {
+ ///
+ /// The SHA384 hash of an X.509 certificate's To-Be-Signed contents.
+ ///
+ EFI_SHA384_HASH ToBeSignedHash;
+ ///
+ /// The time that the certificate shall be considered to be revoked.
+ ///
+ EFI_TIME TimeOfRevocation;
+} EFI_CERT_X509_SHA384;
+
+typedef struct {
+ ///
+ /// The SHA512 hash of an X.509 certificate's To-Be-Signed contents.
+ ///
+ EFI_SHA512_HASH ToBeSignedHash;
+ ///
+ /// The time that the certificate shall be considered to be revoked.
+ ///
+ EFI_TIME TimeOfRevocation;
+} EFI_CERT_X509_SHA512;
+
+#pragma pack()
+
+///
+/// This identifies a signature containing a SHA-256 hash. The SignatureHeader size shall
+/// always be 0. The SignatureSize shall always be 16 (size of SignatureOwner component) +
+/// 32 bytes.
+///
+#define EFI_CERT_SHA256_GUID \
+ { \
+ 0xc1c41626, 0x504c, 0x4092, {0xac, 0xa9, 0x41, 0xf9, 0x36, 0x93, 0x43, 0x28} \
+ }
+
+///
+/// This identifies a signature containing an RSA-2048 key. The key (only the modulus
+/// since the public key exponent is known to be 0x10001) shall be stored in big-endian
+/// order.
+/// The SignatureHeader size shall always be 0. The SignatureSize shall always be 16 (size
+/// of SignatureOwner component) + 256 bytes.
+///
+#define EFI_CERT_RSA2048_GUID \
+ { \
+ 0x3c5766e8, 0x269c, 0x4e34, {0xaa, 0x14, 0xed, 0x77, 0x6e, 0x85, 0xb3, 0xb6} \
+ }
+
+///
+/// This identifies a signature containing a RSA-2048 signature of a SHA-256 hash. The
+/// SignatureHeader size shall always be 0. The SignatureSize shall always be 16 (size of
+/// SignatureOwner component) + 256 bytes.
+///
+#define EFI_CERT_RSA2048_SHA256_GUID \
+ { \
+ 0xe2b36190, 0x879b, 0x4a3d, {0xad, 0x8d, 0xf2, 0xe7, 0xbb, 0xa3, 0x27, 0x84} \
+ }
+
+///
+/// This identifies a signature containing a SHA-1 hash. The SignatureSize shall always
+/// be 16 (size of SignatureOwner component) + 20 bytes.
+///
+#define EFI_CERT_SHA1_GUID \
+ { \
+ 0x826ca512, 0xcf10, 0x4ac9, {0xb1, 0x87, 0xbe, 0x1, 0x49, 0x66, 0x31, 0xbd} \
+ }
+
+///
+/// TThis identifies a signature containing a RSA-2048 signature of a SHA-1 hash. The
+/// SignatureHeader size shall always be 0. The SignatureSize shall always be 16 (size of
+/// SignatureOwner component) + 256 bytes.
+///
+#define EFI_CERT_RSA2048_SHA1_GUID \
+ { \
+ 0x67f8444f, 0x8743, 0x48f1, {0xa3, 0x28, 0x1e, 0xaa, 0xb8, 0x73, 0x60, 0x80} \
+ }
+
+///
+/// This identifies a signature based on an X.509 certificate. If the signature is an X.509
+/// certificate then verification of the signature of an image should validate the public
+/// key certificate in the image using certificate path verification, up to this X.509
+/// certificate as a trusted root. The SignatureHeader size shall always be 0. The
+/// SignatureSize may vary but shall always be 16 (size of the SignatureOwner component) +
+/// the size of the certificate itself.
+/// Note: This means that each certificate will normally be in a separate EFI_SIGNATURE_LIST.
+///
+#define EFI_CERT_X509_GUID \
+ { \
+ 0xa5c059a1, 0x94e4, 0x4aa7, {0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72} \
+ }
+
+///
+/// This identifies a signature containing a SHA-224 hash. The SignatureHeader size shall
+/// always be 0. The SignatureSize shall always be 16 (size of SignatureOwner component) +
+/// 28 bytes.
+///
+#define EFI_CERT_SHA224_GUID \
+ { \
+ 0xb6e5233, 0xa65c, 0x44c9, {0x94, 0x7, 0xd9, 0xab, 0x83, 0xbf, 0xc8, 0xbd} \
+ }
+
+///
+/// This identifies a signature containing a SHA-384 hash. The SignatureHeader size shall
+/// always be 0. The SignatureSize shall always be 16 (size of SignatureOwner component) +
+/// 48 bytes.
+///
+#define EFI_CERT_SHA384_GUID \
+ { \
+ 0xff3e5307, 0x9fd0, 0x48c9, {0x85, 0xf1, 0x8a, 0xd5, 0x6c, 0x70, 0x1e, 0x1} \
+ }
+
+///
+/// This identifies a signature containing a SHA-512 hash. The SignatureHeader size shall
+/// always be 0. The SignatureSize shall always be 16 (size of SignatureOwner component) +
+/// 64 bytes.
+///
+#define EFI_CERT_SHA512_GUID \
+ { \
+ 0x93e0fae, 0xa6c4, 0x4f50, {0x9f, 0x1b, 0xd4, 0x1e, 0x2b, 0x89, 0xc1, 0x9a} \
+ }
+
+///
+/// This identifies a signature containing the SHA256 hash of an X.509 certificate's
+/// To-Be-Signed contents, and a time of revocation. The SignatureHeader size shall
+/// always be 0. The SignatureSize shall always be 16 (size of the SignatureOwner component)
+/// + 48 bytes for an EFI_CERT_X509_SHA256 structure. If the TimeOfRevocation is non-zero,
+/// the certificate should be considered to be revoked from that time and onwards, and
+/// otherwise the certificate shall be considered to always be revoked.
+///
+#define EFI_CERT_X509_SHA256_GUID \
+ { \
+ 0x3bd2a492, 0x96c0, 0x4079, {0xb4, 0x20, 0xfc, 0xf9, 0x8e, 0xf1, 0x03, 0xed } \
+ }
+
+///
+/// This identifies a signature containing the SHA384 hash of an X.509 certificate's
+/// To-Be-Signed contents, and a time of revocation. The SignatureHeader size shall
+/// always be 0. The SignatureSize shall always be 16 (size of the SignatureOwner component)
+/// + 64 bytes for an EFI_CERT_X509_SHA384 structure. If the TimeOfRevocation is non-zero,
+/// the certificate should be considered to be revoked from that time and onwards, and
+/// otherwise the certificate shall be considered to always be revoked.
+///
+#define EFI_CERT_X509_SHA384_GUID \
+ { \
+ 0x7076876e, 0x80c2, 0x4ee6, {0xaa, 0xd2, 0x28, 0xb3, 0x49, 0xa6, 0x86, 0x5b } \
+ }
+
+///
+/// This identifies a signature containing the SHA512 hash of an X.509 certificate's
+/// To-Be-Signed contents, and a time of revocation. The SignatureHeader size shall
+/// always be 0. The SignatureSize shall always be 16 (size of the SignatureOwner component)
+/// + 80 bytes for an EFI_CERT_X509_SHA512 structure. If the TimeOfRevocation is non-zero,
+/// the certificate should be considered to be revoked from that time and onwards, and
+/// otherwise the certificate shall be considered to always be revoked.
+///
+#define EFI_CERT_X509_SHA512_GUID \
+ { \
+ 0x446dbf63, 0x2502, 0x4cda, {0xbc, 0xfa, 0x24, 0x65, 0xd2, 0xb0, 0xfe, 0x9d } \
+ }
+
+///
+/// This identifies a signature containing a DER-encoded PKCS #7 version 1.5 [RFC2315]
+/// SignedData value.
+///
+#define EFI_CERT_TYPE_PKCS7_GUID \
+ { \
+ 0x4aafd29d, 0x68df, 0x49ee, {0x8a, 0xa9, 0x34, 0x7d, 0x37, 0x56, 0x65, 0xa7} \
+ }
+
+//***********************************************************************
+// Image Execution Information Table Definition
+//***********************************************************************
+typedef UINT32 EFI_IMAGE_EXECUTION_ACTION;
+
+#define EFI_IMAGE_EXECUTION_AUTHENTICATION 0x00000007
+#define EFI_IMAGE_EXECUTION_AUTH_UNTESTED 0x00000000
+#define EFI_IMAGE_EXECUTION_AUTH_SIG_FAILED 0x00000001
+#define EFI_IMAGE_EXECUTION_AUTH_SIG_PASSED 0x00000002
+#define EFI_IMAGE_EXECUTION_AUTH_SIG_NOT_FOUND 0x00000003
+#define EFI_IMAGE_EXECUTION_AUTH_SIG_FOUND 0x00000004
+#define EFI_IMAGE_EXECUTION_POLICY_FAILED 0x00000005
+#define EFI_IMAGE_EXECUTION_INITIALIZED 0x00000008
+
+//
+// EFI_IMAGE_EXECUTION_INFO is added to EFI System Configuration Table
+// and assigned the GUID EFI_IMAGE_SECURITY_DATABASE_GUID.
+//
+typedef struct {
+ ///
+ /// Describes the action taken by the firmware regarding this image.
+ ///
+ EFI_IMAGE_EXECUTION_ACTION Action;
+ ///
+ /// Size of all of the entire structure.
+ ///
+ UINT32 InfoSize;
+ ///
+ /// If this image was a UEFI device driver (for option ROM, for example) this is the
+ /// null-terminated, user-friendly name for the device. If the image was for an application,
+ /// then this is the name of the application. If this cannot be determined, then a simple
+ /// NULL character should be put in this position.
+ /// CHAR16 Name[];
+ ///
+
+ ///
+ /// For device drivers, this is the device path of the device for which this device driver
+ /// was intended. In some cases, the driver itself may be stored as part of the system
+ /// firmware, but this field should record the device's path, not the firmware path. For
+ /// applications, this is the device path of the application. If this cannot be determined,
+ /// a simple end-of-path device node should be put in this position.
+ /// EFI_DEVICE_PATH_PROTOCOL DevicePath;
+ ///
+
+ ///
+ /// Zero or more image signatures. If the image contained no signatures,
+ /// then this field is empty.
+ /// EFI_SIGNATURE_LIST Signature;
+ ///
+} EFI_IMAGE_EXECUTION_INFO;
+
+
+typedef struct {
+ ///
+ /// Number of EFI_IMAGE_EXECUTION_INFO structures.
+ ///
+ UINTN NumberOfImages;
+ ///
+ /// Number of image instances of EFI_IMAGE_EXECUTION_INFO structures.
+ ///
+ // EFI_IMAGE_EXECUTION_INFO InformationInfo[]
+} EFI_IMAGE_EXECUTION_INFO_TABLE;
+
+extern EFI_GUID gEfiImageSecurityDatabaseGuid;
+extern EFI_GUID gEfiCertSha256Guid;
+extern EFI_GUID gEfiCertRsa2048Guid;
+extern EFI_GUID gEfiCertRsa2048Sha256Guid;
+extern EFI_GUID gEfiCertSha1Guid;
+extern EFI_GUID gEfiCertRsa2048Sha1Guid;
+extern EFI_GUID gEfiCertX509Guid;
+extern EFI_GUID gEfiCertSha224Guid;
+extern EFI_GUID gEfiCertSha384Guid;
+extern EFI_GUID gEfiCertSha512Guid;
+extern EFI_GUID gEfiCertX509Sha256Guid;
+extern EFI_GUID gEfiCertX509Sha384Guid;
+extern EFI_GUID gEfiCertX509Sha512Guid;
+extern EFI_GUID gEfiCertPkcs7Guid;
+
+#endif
Index: stand/efi/include/Protocol/Hash.h
===================================================================
--- /dev/null
+++ stand/efi/include/Protocol/Hash.h
@@ -0,0 +1,178 @@
+/* $FreeBSD$ */
+/** @file
+ EFI_HASH_SERVICE_BINDING_PROTOCOL as defined in UEFI 2.0.
+ EFI_HASH_PROTOCOL as defined in UEFI 2.0.
+ The EFI Hash Service Binding Protocol is used to locate hashing services support
+ provided by a driver and to create and destroy instances of the EFI Hash Protocol
+ so that a multiple drivers can use the underlying hashing services.
+
+Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under
+the terms and conditions of the BSD License that accompanies this distribution.
+The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php.
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __EFI_HASH_PROTOCOL_H__
+#define __EFI_HASH_PROTOCOL_H__
+
+#define CONST const
+
+#define EFI_HASH_SERVICE_BINDING_PROTOCOL_GUID \
+ { \
+ 0x42881c98, 0xa4f3, 0x44b0, {0xa3, 0x9d, 0xdf, 0xa1, 0x86, 0x67, 0xd8, 0xcd } \
+ }
+
+#define EFI_HASH_PROTOCOL_GUID \
+ { \
+ 0xc5184932, 0xdba5, 0x46db, {0xa5, 0xba, 0xcc, 0x0b, 0xda, 0x9c, 0x14, 0x35 } \
+ }
+
+#define EFI_HASH_ALGORITHM_SHA1_GUID \
+ { \
+ 0x2ae9d80f, 0x3fb2, 0x4095, {0xb7, 0xb1, 0xe9, 0x31, 0x57, 0xb9, 0x46, 0xb6 } \
+ }
+
+#define EFI_HASH_ALGORITHM_SHA224_GUID \
+ { \
+ 0x8df01a06, 0x9bd5, 0x4bf7, {0xb0, 0x21, 0xdb, 0x4f, 0xd9, 0xcc, 0xf4, 0x5b } \
+ }
+
+#define EFI_HASH_ALGORITHM_SHA256_GUID \
+ { \
+ 0x51aa59de, 0xfdf2, 0x4ea3, {0xbc, 0x63, 0x87, 0x5f, 0xb7, 0x84, 0x2e, 0xe9 } \
+ }
+
+#define EFI_HASH_ALGORITHM_SHA384_GUID \
+ { \
+ 0xefa96432, 0xde33, 0x4dd2, {0xae, 0xe6, 0x32, 0x8c, 0x33, 0xdf, 0x77, 0x7a } \
+ }
+
+#define EFI_HASH_ALGORITHM_SHA512_GUID \
+ { \
+ 0xcaa4381e, 0x750c, 0x4770, {0xb8, 0x70, 0x7a, 0x23, 0xb4, 0xe4, 0x21, 0x30 } \
+ }
+
+#define EFI_HASH_ALGORTIHM_MD5_GUID \
+ { \
+ 0xaf7c79c, 0x65b5, 0x4319, {0xb0, 0xae, 0x44, 0xec, 0x48, 0x4e, 0x4a, 0xd7 } \
+ }
+
+#define EFI_HASH_ALGORITHM_SHA1_NOPAD_GUID \
+ { \
+ 0x24c5dc2f, 0x53e2, 0x40ca, {0x9e, 0xd6, 0xa5, 0xd9, 0xa4, 0x9f, 0x46, 0x3b } \
+ }
+
+#define EFI_HASH_ALGORITHM_SHA256_NOPAD_GUID \
+ { \
+ 0x8628752a, 0x6cb7, 0x4814, {0x96, 0xfc, 0x24, 0xa8, 0x15, 0xac, 0x22, 0x26 } \
+ }
+
+//
+// Note: Use of the following algorithms with EFI_HASH_PROTOCOL is deprecated.
+// EFI_HASH_ALGORITHM_SHA1_GUID
+// EFI_HASH_ALGORITHM_SHA224_GUID
+// EFI_HASH_ALGORITHM_SHA256_GUID
+// EFI_HASH_ALGORITHM_SHA384_GUID
+// EFI_HASH_ALGORITHM_SHA512_GUID
+// EFI_HASH_ALGORTIHM_MD5_GUID
+//
+
+typedef struct _EFI_HASH_PROTOCOL EFI_HASH_PROTOCOL;
+
+typedef UINT8 EFI_MD5_HASH[16];
+typedef UINT8 EFI_SHA1_HASH[20];
+typedef UINT8 EFI_SHA224_HASH[28];
+typedef UINT8 EFI_SHA256_HASH[32];
+typedef UINT8 EFI_SHA384_HASH[48];
+typedef UINT8 EFI_SHA512_HASH[64];
+
+typedef union {
+ EFI_MD5_HASH *Md5Hash;
+ EFI_SHA1_HASH *Sha1Hash;
+ EFI_SHA224_HASH *Sha224Hash;
+ EFI_SHA256_HASH *Sha256Hash;
+ EFI_SHA384_HASH *Sha384Hash;
+ EFI_SHA512_HASH *Sha512Hash;
+} EFI_HASH_OUTPUT;
+
+/**
+ Returns the size of the hash which results from a specific algorithm.
+
+ @param[in] This Points to this instance of EFI_HASH_PROTOCOL.
+ @param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
+ @param[out] HashSize Holds the returned size of the algorithm's hash.
+
+ @retval EFI_SUCCESS Hash size returned successfully.
+ @retval EFI_INVALID_PARAMETER HashSize is NULL or HashAlgorithm is NULL.
+ @retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported
+ by this driver.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_HASH_GET_HASH_SIZE)(
+ IN CONST EFI_HASH_PROTOCOL *This,
+ IN CONST EFI_GUID *HashAlgorithm,
+ OUT UINTN *HashSize
+ );
+
+/**
+ Creates a hash for the specified message text.
+
+ @param[in] This Points to this instance of EFI_HASH_PROTOCOL.
+ @param[in] HashAlgorithm Points to the EFI_GUID which identifies the algorithm to use.
+ @param[in] Extend Specifies whether to create a new hash (FALSE) or extend the specified
+ existing hash (TRUE).
+ @param[in] Message Points to the start of the message.
+ @param[in] MessageSize The size of Message, in bytes.
+ @param[in,out] Hash On input, if Extend is TRUE, then this parameter holds a pointer
+ to a pointer to an array containing the hash to extend. If Extend
+ is FALSE, then this parameter holds a pointer to a pointer to a
+ caller-allocated array that will receive the result of the hash
+ computation. On output (regardless of the value of Extend), the
+ array will contain the result of the hash computation.
+
+ @retval EFI_SUCCESS Hash returned successfully.
+ @retval EFI_INVALID_PARAMETER Message or Hash, HashAlgorithm is NULL or MessageSize is 0.
+ MessageSize is not an integer multiple of block size.
+ @retval EFI_UNSUPPORTED The algorithm specified by HashAlgorithm is not supported by this
+ driver. Or, Extend is TRUE, and the algorithm doesn't support extending the hash.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_HASH_HASH)(
+ IN CONST EFI_HASH_PROTOCOL *This,
+ IN CONST EFI_GUID *HashAlgorithm,
+ IN BOOLEAN Extend,
+ IN CONST UINT8 *Message,
+ IN UINT64 MessageSize,
+ IN OUT EFI_HASH_OUTPUT *Hash
+ );
+
+///
+/// This protocol allows creating a hash of an arbitrary message digest
+/// using one or more hash algorithms.
+///
+struct _EFI_HASH_PROTOCOL {
+ EFI_HASH_GET_HASH_SIZE GetHashSize;
+ EFI_HASH_HASH Hash;
+};
+
+extern EFI_GUID gEfiHashServiceBindingProtocolGuid;
+extern EFI_GUID gEfiHashProtocolGuid;
+extern EFI_GUID gEfiHashAlgorithmSha1Guid;
+extern EFI_GUID gEfiHashAlgorithmSha224Guid;
+extern EFI_GUID gEfiHashAlgorithmSha256Guid;
+extern EFI_GUID gEfiHashAlgorithmSha384Guid;
+extern EFI_GUID gEfiHashAlgorithmSha512Guid;
+extern EFI_GUID gEfiHashAlgorithmMD5Guid;
+extern EFI_GUID gEfiHashAlgorithmSha1NoPadGuid;
+extern EFI_GUID gEfiHashAlgorithmSha256NoPadGuid;
+
+#endif
Index: stand/efi/include/efiapi.h
===================================================================
--- stand/efi/include/efiapi.h
+++ stand/efi/include/efiapi.h
@@ -28,6 +28,8 @@
--*/
+#include <Guid/GlobalVariable.h>
+
//
// EFI Specification Revision
//
@@ -210,13 +212,6 @@
);
-//
-// EFI platform varibles
-//
-
-#define EFI_GLOBAL_VARIABLE \
- { 0x8BE4DF61, 0x93CA, 0x11d2, {0xAA, 0x0D, 0x00, 0xE0, 0x98, 0x03, 0x2B, 0x8C} }
-
// Variable attributes
#define EFI_VARIABLE_NON_VOLATILE 0x00000001
#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x00000002
Index: stand/efi/include/efisecureboot.h
===================================================================
--- /dev/null
+++ stand/efi/include/efisecureboot.h
@@ -0,0 +1,38 @@
+/*-
+ * Copyright (c) 2019 Stormshield.
+ * Copyright (c) 2019 Semihalf.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef EFISECUREBOOT_H
+#define EFISECUREBOOT_H
+
+#include <bearssl.h>
+
+int efi_secure_boot_enabled(void);
+br_x509_certificate* efi_secure_boot_get_CAs(size_t *count);
+br_x509_certificate* efi_secure_boot_get_forbidden_CAs(size_t *count);
+int efi_secure_boot_cert_forbidden(const char *cert, size_t length);
+
+#endif /* EFISECUREBOOT_H */
Index: stand/efi/libefi/Makefile
===================================================================
--- stand/efi/libefi/Makefile
+++ stand/efi/libefi/Makefile
@@ -27,6 +27,11 @@
SRCS+= time_event.c
.endif
+.if ${MK_SECUREBOOT} == "yes"
+SRCS+= efisecureboot.c
+CFLAGS+= -DSECURE_BOOT
+.endif
+
# We implement a slightly non-standard %S in that it always takes a
# CHAR16 that's common in UEFI-land instead of a wchar_t. This only
# seems to matter on arm64 where wchar_t defaults to an int instead
Index: stand/efi/libefi/efienv.c
===================================================================
--- stand/efi/libefi/efienv.c
+++ stand/efi/libefi/efienv.c
@@ -49,7 +49,7 @@
return (EFI_OUT_OF_RESOURCES);
dl = *len;
rv = RS->GetVariable(uv, g, &attr, &dl, data);
- if (rv == EFI_SUCCESS)
+ if (rv == EFI_SUCCESS || rv == EFI_BUFFER_TOO_SMALL)
*len = dl;
free(uv);
return (rv);
Index: stand/efi/libefi/efisecureboot.c
===================================================================
--- /dev/null
+++ stand/efi/libefi/efisecureboot.c
@@ -0,0 +1,240 @@
+/*-
+ * Copyright (c) 2019 Stormshield.
+ * Copyright (c) 2019 Semihalf.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stand.h>
+#include <string.h>
+#include <sys/param.h>
+
+#include <efi.h>
+#include <efilib.h>
+#include <efisecureboot.h>
+#include <Guid/ImageAuthentication.h>
+
+#include <bearssl.h>
+
+static EFI_GUID ImageSecurityDatabaseGUID = EFI_IMAGE_SECURITY_DATABASE_GUID;
+
+static EFI_GUID efiCertX509GUID = EFI_CERT_X509_GUID;
+static EFI_GUID efiCertX509Sha256GUID = EFI_CERT_X509_SHA256_GUID;
+static EFI_GUID efiCertX509Sha384GUID = EFI_CERT_X509_SHA384_GUID;
+static EFI_GUID efiCertX509Sha5122UID = EFI_CERT_X509_SHA512_GUID;
+
+int
+efi_secure_boot_enabled(void)
+{
+ UINT8 SecureBoot;
+ UINT8 SetupMode;
+ size_t length;
+ EFI_STATUS status;
+
+ length = sizeof SecureBoot;
+ status = efi_global_getenv("SecureBoot", &SecureBoot, &length);
+ if (status != EFI_SUCCESS) {
+ if (status == EFI_NOT_FOUND)
+ return 0;
+
+ printf("Failed to read \"SecureBoot\" variable\n");
+ return -efi_status_to_errno(status);
+ }
+
+ length = sizeof SecureBoot;
+ status = efi_global_getenv("SetupMode", &SetupMode, &length);
+ if (status != EFI_SUCCESS)
+ SetupMode = 0;
+
+ printf("SecureBoot:%d, SetupMode:%d\n", SecureBoot, SetupMode);
+
+ return (SecureBoot == 1 && SetupMode == 0);
+}
+
+static br_x509_certificate*
+efi_get_certs(const char *name, size_t *count)
+{
+ UINT8 *database;
+ EFI_SIGNATURE_LIST *list;
+ EFI_SIGNATURE_DATA *entry;
+ br_x509_certificate *certs;
+ size_t length;
+ size_t cert_count;
+ EFI_STATUS status;
+
+ database = NULL;
+ length = 0;
+
+ /* Read variable length and allocate proper buffer. */
+ status = efi_getenv(&ImageSecurityDatabaseGUID, name, database, &length);
+ if (status != EFI_BUFFER_TOO_SMALL)
+ return NULL;
+
+ database = malloc(length);
+ if (database == NULL)
+ return NULL;
+
+ status = efi_getenv(&ImageSecurityDatabaseGUID, name, database, &length);
+ if (status != EFI_SUCCESS)
+ return NULL;
+
+ list = (EFI_SIGNATURE_LIST*) database;
+ certs = NULL;
+ cert_count = 0;
+
+ for(;length >= list->SignatureListSize && length > 0;
+ length -= list->SignatureListSize,
+ list = (EFI_SIGNATURE_LIST*)((UINT8*)list + list->SignatureListSize)) {
+ if (memcmp(&efiCertX509GUID, &list->SignatureType,
+ sizeof(EFI_GUID)) != 0) {
+ continue;
+ }
+
+ entry = (EFI_SIGNATURE_DATA*)
+ ((UINT8*)list +
+ sizeof(EFI_SIGNATURE_LIST) +
+ list->SignatureHeaderSize);
+
+ certs = realloc(certs, (cert_count + 1) * sizeof(br_x509_certificate));
+ if (certs == NULL)
+ return NULL;
+
+ certs[cert_count].data_len = list->SignatureSize - sizeof(EFI_GUID);
+ certs[cert_count].data = malloc(certs[cert_count].data_len);
+ if (certs[cert_count].data == NULL)
+ goto fail;
+
+ memcpy(certs[cert_count].data,
+ entry->SignatureData,
+ certs[cert_count].data_len);
+
+ cert_count++;
+ }
+
+ *count = cert_count;
+
+ free(database);
+ return certs;
+
+fail:
+ while (cert_count-- > 0) {
+ free(certs[cert_count].data);
+ free(&certs[cert_count]);
+ }
+
+ free(database);
+ free(certs);
+ return NULL;
+
+}
+
+int
+efi_secure_boot_cert_forbidden(const char *cert, size_t cert_length)
+{
+ UINT8 *database;
+ EFI_SIGNATURE_LIST *list;
+ EFI_SIGNATURE_DATA *entry;
+ size_t length;
+ size_t header_size;
+ size_t digest_size;
+ size_t hash_count;
+ EFI_STATUS status;
+ br_hash_compat_context hash_ctx;
+ const br_hash_class *md;
+ unsigned char digest[br_sha512_SIZE];
+
+ length = 0;
+
+ status = efi_getenv(&ImageSecurityDatabaseGUID, "dbx", database, &length);
+ if (status != EFI_BUFFER_TOO_SMALL) {
+ if (status == EFI_NOT_FOUND)
+ return (0);
+
+ return efi_status_to_errno(status);
+ }
+
+ database = malloc(length);
+ if (database == NULL)
+ return ENOMEM;
+
+ status = efi_getenv(&ImageSecurityDatabaseGUID, "dbx", database, &length);
+ if (status != EFI_SUCCESS)
+ return efi_status_to_errno(status);
+
+ list = (EFI_SIGNATURE_LIST*) database;
+ for(;length >= list->SignatureListSize && length > 0;
+ length -= list->SignatureListSize,
+ list = (EFI_SIGNATURE_LIST*)((UINT8*)list + list->SignatureListSize)) {
+ if (memcmp(&efiCertX509Sha256GUID, &list->SignatureType,
+ sizeof(EFI_GUID)) == 0) {
+ md = &br_sha256_vtable;
+ digest_size = br_sha256_SIZE;
+ } else if(memcmp(&efiCertX509Sha384GUID, &list->SignatureType,
+ sizeof(EFI_GUID)) == 0) {
+ md = &br_sha384_vtable;
+ digest_size = br_sha384_SIZE;
+ } else if(memcmp(&efiCertX509Sha5122UID, &list->SignatureType,
+ sizeof(EFI_GUID)) == 0) {
+ md = &br_sha512_vtable;
+ digest_size = br_sha512_SIZE;
+ } else {
+ continue;
+ }
+
+ md->init(&hash_ctx.vtable);
+ md->update(&hash_ctx.vtable, cert, cert_length);
+ md->out(&hash_ctx.vtable, digest);
+
+ header_size = sizeof(EFI_SIGNATURE_LIST) + list->SignatureHeaderSize;
+
+ hash_count = list->SignatureListSize - header_size;
+ hash_count /= list->SignatureSize;
+
+ entry = (EFI_SIGNATURE_DATA*)((UINT8*)list + header_size);
+ while (hash_count-- > 0) {
+ if (memcmp(digest, entry->SignatureData, digest_size) == 0)
+ return EACCES;
+
+ entry = (EFI_SIGNATURE_DATA*)(entry + list->SignatureSize);
+ }
+ }
+
+ return 0;
+}
+
+/* Copy x509 certificates from db */
+br_x509_certificate*
+efi_secure_boot_get_CAs(size_t *count)
+{
+ return efi_get_certs("db", count);
+}
+
+/* Copy forbidden certificates from dbx */
+br_x509_certificate*
+efi_secure_boot_get_forbidden_CAs(size_t *count)
+{
+ return efi_get_certs("dbx", count);
+}
Index: stand/efi/loader/Makefile
===================================================================
--- stand/efi/loader/Makefile
+++ stand/efi/loader/Makefile
@@ -36,6 +36,11 @@
CWARNFLAGS.self_reloc.c+= -Wno-error=maybe-uninitialized
.endif
+.if ${MK_SECUREBOOT} == "yes"
+SRCS+= verify.c
+CFLAGS+= -DSECURE_BOOT
+.endif
+
# We implement a slightly non-standard %S in that it always takes a
# CHAR16 that's common in UEFI-land instead of a wchar_t. This only
# seems to matter on arm64 where wchar_t defaults to an int instead
Index: stand/efi/loader/main.c
===================================================================
--- stand/efi/loader/main.c
+++ stand/efi/loader/main.c
@@ -43,6 +43,9 @@
#include <efi.h>
#include <efilib.h>
#include <efichar.h>
+#ifdef SECURE_BOOT
+#include <efisecureboot.h>
+#endif
#include <uuid.h>
@@ -766,6 +769,12 @@
/* Note this needs to be set before ZFS init. */
archsw.arch_zfs_probe = efi_zfs_probe;
#endif
+#ifdef SECURE_BOOT
+ archsw.secure_boot_enabled = efi_secure_boot_enabled;
+ archsw.secure_boot_get_CAs = efi_secure_boot_get_CAs;
+ archsw.secure_boot_get_forbidden_CAs = efi_secure_boot_get_forbidden_CAs;
+ archsw.secure_boot_cert_forbidden = efi_secure_boot_cert_forbidden;
+#endif
/* Get our loaded image protocol interface structure. */
BS->HandleProtocol(IH, &imgid, (VOID**)&img);
Index: stand/libsa/Makefile
===================================================================
--- stand/libsa/Makefile
+++ stand/libsa/Makefile
@@ -169,4 +169,9 @@
.include "${SASRC}/zfs/Makefile.inc"
.endif
+.if ${MK_SECUREBOOT} == "yes"
+.include "${SRCTOP}/lib/libbearssl/Makefile.libsa.inc"
+.include "${SRCTOP}/lib/libsecureboot/Makefile.libsa.inc"
+.endif
+
.include <bsd.lib.mk>

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