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## @file
# This tool adds EFI_FIRMWARE_IMAGE_AUTHENTICATION for a binary.
#
# This tool only support CertType - EFI_CERT_TYPE_PKCS7_GUID
# {0x4aafd29d, 0x68df, 0x49ee, {0x8a, 0xa9, 0x34, 0x7d, 0x37, 0x56, 0x65, 0xa7}}
#
# This tool has been tested with OpenSSL.
#
# Copyright (c) 2016 - 2017, 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.
#
'''
Pkcs7Sign
'''
from __future__ import print_function
import os
import sys
import argparse
import subprocess
import uuid
import struct
import collections
from Common.BuildVersion import gBUILD_VERSION
#
# Globals for help information
#
__prog__ = 'Pkcs7Sign'
__version__ = '%s Version %s' % (__prog__, '0.9 ' + gBUILD_VERSION)
__copyright__ = 'Copyright (c) 2016, Intel Corporation. All rights reserved.'
__usage__ = '%s -e|-d [options] <input_file>' % (__prog__)
#
# GUID for PKCS7 from UEFI Specification
#
WIN_CERT_REVISION = 0x0200
WIN_CERT_TYPE_EFI_GUID = 0x0EF1
EFI_CERT_TYPE_PKCS7_GUID = uuid.UUID('{4aafd29d-68df-49ee-8aa9-347d375665a7}')
#
# typedef struct _WIN_CERTIFICATE {
# UINT32 dwLength;
# UINT16 wRevision;
# UINT16 wCertificateType;
# //UINT8 bCertificate[ANYSIZE_ARRAY];
# } WIN_CERTIFICATE;
#
# typedef struct _WIN_CERTIFICATE_UEFI_GUID {
# WIN_CERTIFICATE Hdr;
# EFI_GUID CertType;
# //UINT8 CertData[ANYSIZE_ARRAY];
# } WIN_CERTIFICATE_UEFI_GUID;
#
# typedef struct {
# UINT64 MonotonicCount;
# WIN_CERTIFICATE_UEFI_GUID AuthInfo;
# } EFI_FIRMWARE_IMAGE_AUTHENTICATION;
#
#
# Filename of test signing private cert that is stored in same directory as this tool
#
TEST_SIGNER_PRIVATE_CERT_FILENAME = 'TestCert.pem'
TEST_OTHER_PUBLIC_CERT_FILENAME = 'TestSub.pub.pem'
TEST_TRUSTED_PUBLIC_CERT_FILENAME = 'TestRoot.pub.pem'
if __name__ == '__main__':
#
# Create command line argument parser object
#
parser = argparse.ArgumentParser(prog=__prog__, usage=__usage__, description=__copyright__, conflict_handler='resolve')
group = parser.add_mutually_exclusive_group(required=True)
group.add_argument("-e", action="store_true", dest='Encode', help='encode file')
group.add_argument("-d", action="store_true", dest='Decode', help='decode file')
group.add_argument("--version", action='version', version=__version__)
parser.add_argument("-o", "--output", dest='OutputFile', type=str, metavar='filename', help="specify the output filename", required=True)
parser.add_argument("--signer-private-cert", dest='SignerPrivateCertFile', type=argparse.FileType('rb'), help="specify the signer private cert filename. If not specified, a test signer private cert is used.")
parser.add_argument("--other-public-cert", dest='OtherPublicCertFile', type=argparse.FileType('rb'), help="specify the other public cert filename. If not specified, a test other public cert is used.")
parser.add_argument("--trusted-public-cert", dest='TrustedPublicCertFile', type=argparse.FileType('rb'), help="specify the trusted public cert filename. If not specified, a test trusted public cert is used.")
parser.add_argument("--monotonic-count", dest='MonotonicCountStr', type=str, help="specify the MonotonicCount in FMP capsule. If not specified, 0 is used.")
parser.add_argument("--signature-size", dest='SignatureSizeStr', type=str, help="specify the signature size for decode process.")
parser.add_argument("-v", "--verbose", dest='Verbose', action="store_true", help="increase output messages")
parser.add_argument("-q", "--quiet", dest='Quiet', action="store_true", help="reduce output messages")
parser.add_argument("--debug", dest='Debug', type=int, metavar='[0-9]', choices=range(0, 10), default=0, help="set debug level")
parser.add_argument(metavar="input_file", dest='InputFile', type=argparse.FileType('rb'), help="specify the input filename")
#
# Parse command line arguments
#
args = parser.parse_args()
#
# Generate file path to Open SSL command
#
OpenSslCommand = 'openssl'
try:
OpenSslPath = os.environ['OPENSSL_PATH']
OpenSslCommand = os.path.join(OpenSslPath, OpenSslCommand)
if ' ' in OpenSslCommand:
OpenSslCommand = '"' + OpenSslCommand + '"'
except:
pass
#
# Verify that Open SSL command is available
#
try:
Process = subprocess.Popen('%s version' % (OpenSslCommand), stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
except:
print('ERROR: Open SSL command not available. Please verify PATH or set OPENSSL_PATH')
sys.exit(1)
Version = Process.communicate()
if Process.returncode != 0:
print('ERROR: Open SSL command not available. Please verify PATH or set OPENSSL_PATH')
sys.exit(Process.returncode)
print(Version[0].decode(encoding='utf-8', errors='ignore'))
#
# Read input file into a buffer and save input filename
#
args.InputFileName = args.InputFile.name
args.InputFileBuffer = args.InputFile.read()
args.InputFile.close()
#
# Save output filename and check if path exists
#
OutputDir = os.path.dirname(args.OutputFile)
if not os.path.exists(OutputDir):
print('ERROR: The output path does not exist: %s' % OutputDir)
sys.exit(1)
args.OutputFileName = args.OutputFile
try:
if args.MonotonicCountStr.upper().startswith('0X'):
args.MonotonicCountValue = int(args.MonotonicCountStr, 16)
else:
args.MonotonicCountValue = int(args.MonotonicCountStr)
except:
args.MonotonicCountValue = int(0)
if args.Encode:
#
# Save signer private cert filename and close private cert file
#
try:
args.SignerPrivateCertFileName = args.SignerPrivateCertFile.name
args.SignerPrivateCertFile.close()
except:
try:
#
# Get path to currently executing script or executable
#
if hasattr(sys, 'frozen'):
Pkcs7ToolPath = sys.executable
else:
Pkcs7ToolPath = sys.argv[0]
if Pkcs7ToolPath.startswith('"'):
Pkcs7ToolPath = Pkcs7ToolPath[1:]
if Pkcs7ToolPath.endswith('"'):
Pkcs7ToolPath = RsaToolPath[:-1]
args.SignerPrivateCertFileName = os.path.join(os.path.dirname(os.path.realpath(Pkcs7ToolPath)), TEST_SIGNER_PRIVATE_CERT_FILENAME)
args.SignerPrivateCertFile = open(args.SignerPrivateCertFileName, 'rb')
args.SignerPrivateCertFile.close()
except:
print('ERROR: test signer private cert file %s missing' % (args.SignerPrivateCertFileName))
sys.exit(1)
#
# Save other public cert filename and close public cert file
#
try:
args.OtherPublicCertFileName = args.OtherPublicCertFile.name
args.OtherPublicCertFile.close()
except:
try:
#
# Get path to currently executing script or executable
#
if hasattr(sys, 'frozen'):
Pkcs7ToolPath = sys.executable
else:
Pkcs7ToolPath = sys.argv[0]
if Pkcs7ToolPath.startswith('"'):
Pkcs7ToolPath = Pkcs7ToolPath[1:]
if Pkcs7ToolPath.endswith('"'):
Pkcs7ToolPath = RsaToolPath[:-1]
args.OtherPublicCertFileName = os.path.join(os.path.dirname(os.path.realpath(Pkcs7ToolPath)), TEST_OTHER_PUBLIC_CERT_FILENAME)
args.OtherPublicCertFile = open(args.OtherPublicCertFileName, 'rb')
args.OtherPublicCertFile.close()
except:
print('ERROR: test other public cert file %s missing' % (args.OtherPublicCertFileName))
sys.exit(1)
format = "%dsQ" % len(args.InputFileBuffer)
FullInputFileBuffer = struct.pack(format, args.InputFileBuffer, args.MonotonicCountValue)
#
# Sign the input file using the specified private key and capture signature from STDOUT
#
Process = subprocess.Popen('%s smime -sign -binary -signer "%s" -outform DER -md sha256 -certfile "%s"' % (OpenSslCommand, args.SignerPrivateCertFileName, args.OtherPublicCertFileName), stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
Signature = Process.communicate(input=FullInputFileBuffer)[0]
if Process.returncode != 0:
sys.exit(Process.returncode)
#
# Write output file that contains Signature, and Input data
#
args.OutputFile = open(args.OutputFileName, 'wb')
args.OutputFile.write(Signature)
args.OutputFile.write(args.InputFileBuffer)
args.OutputFile.close()
if args.Decode:
#
# Save trusted public cert filename and close public cert file
#
try:
args.TrustedPublicCertFileName = args.TrustedPublicCertFile.name
args.TrustedPublicCertFile.close()
except:
try:
#
# Get path to currently executing script or executable
#
if hasattr(sys, 'frozen'):
Pkcs7ToolPath = sys.executable
else:
Pkcs7ToolPath = sys.argv[0]
if Pkcs7ToolPath.startswith('"'):
Pkcs7ToolPath = Pkcs7ToolPath[1:]
if Pkcs7ToolPath.endswith('"'):
Pkcs7ToolPath = RsaToolPath[:-1]
args.TrustedPublicCertFileName = os.path.join(os.path.dirname(os.path.realpath(Pkcs7ToolPath)), TEST_TRUSTED_PUBLIC_CERT_FILENAME)
args.TrustedPublicCertFile = open(args.TrustedPublicCertFileName, 'rb')
args.TrustedPublicCertFile.close()
except:
print('ERROR: test trusted public cert file %s missing' % (args.TrustedPublicCertFileName))
sys.exit(1)
if not args.SignatureSizeStr:
print("ERROR: please use the option --signature-size to specify the size of the signature data!")
sys.exit(1)
else:
if args.SignatureSizeStr.upper().startswith('0X'):
SignatureSize = int(args.SignatureSizeStr, 16)
else:
SignatureSize = int(args.SignatureSizeStr)
if SignatureSize < 0:
print("ERROR: The value of option --signature-size can't be set to negative value!")
sys.exit(1)
elif SignatureSize > len(args.InputFileBuffer):
print("ERROR: The value of option --signature-size is exceed the size of the input file !")
sys.exit(1)
args.SignatureBuffer = args.InputFileBuffer[0:SignatureSize]
args.InputFileBuffer = args.InputFileBuffer[SignatureSize:]
format = "%dsQ" % len(args.InputFileBuffer)
FullInputFileBuffer = struct.pack(format, args.InputFileBuffer, args.MonotonicCountValue)
#
# Save output file contents from input file
#
open(args.OutputFileName, 'wb').write(FullInputFileBuffer)
#
# Verify signature
#
Process = subprocess.Popen('%s smime -verify -inform DER -content %s -CAfile %s' % (OpenSslCommand, args.OutputFileName, args.TrustedPublicCertFileName), stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
Process.communicate(input=args.SignatureBuffer)[0]
if Process.returncode != 0:
print('ERROR: Verification failed')
os.remove (args.OutputFileName)
sys.exit(Process.returncode)
open(args.OutputFileName, 'wb').write(args.InputFileBuffer)
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