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[110.66.21.100]) by smtp.gmail.com with ESMTPSA id ds11sm1080789pjb.0.2020.06.15.22.28.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2020 22:28:26 -0700 (PDT) From: AKASHI Takahiro To: xypron.glpk@gmx.de, agraf@csgraf.de Cc: sughosh.ganu@linaro.org, mail@patrick-wildt.de, u-boot@lists.denx.de, AKASHI Takahiro Subject: [PATCH v2 8/8] test/py: efi_secboot: add test for intermediate certificates Date: Tue, 16 Jun 2020 14:26:55 +0900 Message-Id: <20200616052655.4845-9-takahiro.akashi@linaro.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200616052655.4845-1-takahiro.akashi@linaro.org> References: <20200616052655.4845-1-takahiro.akashi@linaro.org> MIME-Version: 1.0 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.30rc1 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.102.2 at phobos.denx.de X-Virus-Status: Clean In this test case, an image may have a signature with additional intermediate certificates. A chain of trust will be followed and all the certificates in the middle of chain must be verified before loading. Signed-off-by: AKASHI Takahiro --- test/py/tests/test_efi_secboot/conftest.py | 138 +++++++++++++++++- test/py/tests/test_efi_secboot/defs.py | 11 +- test/py/tests/test_efi_secboot/openssl.cnf | 48 ++++++ .../test_efi_secboot/test_signed_intca.py | 134 +++++++++++++++++ 4 files changed, 328 insertions(+), 3 deletions(-) create mode 100644 test/py/tests/test_efi_secboot/openssl.cnf create mode 100644 test/py/tests/test_efi_secboot/test_signed_intca.py diff --git a/test/py/tests/test_efi_secboot/conftest.py b/test/py/tests/test_efi_secboot/conftest.py index 34abcd79ae00..e5ac2a2a21b7 100644 --- a/test/py/tests/test_efi_secboot/conftest.py +++ b/test/py/tests/test_efi_secboot/conftest.py @@ -37,7 +37,7 @@ def efi_boot_env(request, u_boot_config): global HELLO_PATH image_path = u_boot_config.persistent_data_dir - image_path = image_path + '/' + EFI_SECBOOT_IMAGE_NAME + image_path = image_path + '/' + EFI_SECBOOT_IMAGE_NAME + '.img' image_size = EFI_SECBOOT_IMAGE_SIZE part_size = EFI_SECBOOT_PART_SIZE fs_type = EFI_SECBOOT_FS_TYPE @@ -46,7 +46,7 @@ def efi_boot_env(request, u_boot_config): HELLO_PATH = u_boot_config.build_dir + '/lib/efi_loader/helloworld.efi' try: - mnt_point = u_boot_config.persistent_data_dir + '/mnt_efisecure' + mnt_point = u_boot_config.persistent_data_dir + MNTPNT check_call('mkdir -p {}'.format(mnt_point), shell=True) # create a disk/partition @@ -170,3 +170,137 @@ def efi_boot_env(request, u_boot_config): yield image_path finally: call('rm -f %s' % image_path, shell=True) + +# +# Fixture for UEFI secure boot test of intermediate certificates +# +@pytest.fixture(scope='session') +def efi_boot_env_intca(request, u_boot_config): + """Set up a file system to be used in UEFI secure boot test + of intermediate certificates. + + Args: + request: Pytest request object. + u_boot_config: U-boot configuration. + + Return: + A path to disk image to be used for testing + """ + global HELLO_PATH + + image_path = u_boot_config.persistent_data_dir + image_path = image_path + '/' + EFI_SECBOOT_IMAGE_NAME + '_intca.img' + image_size = EFI_SECBOOT_IMAGE_SIZE + part_size = EFI_SECBOOT_PART_SIZE + fs_type = EFI_SECBOOT_FS_TYPE + + if HELLO_PATH == '': + HELLO_PATH = u_boot_config.build_dir + '/lib/efi_loader/helloworld.efi' + + try: + mnt_point = u_boot_config.persistent_data_dir + MNTPNT + check_call('mkdir -p {}'.format(mnt_point), shell=True) + + # create a disk/partition + check_call('dd if=/dev/zero of=%s bs=1MiB count=%d' + % (image_path, image_size), shell=True) + check_call('sgdisk %s -n 1:0:+%dMiB' + % (image_path, part_size), shell=True) + # create a file system + check_call('dd if=/dev/zero of=%s.tmp bs=1MiB count=%d' + % (image_path, part_size), shell=True) + check_call('mkfs -t %s %s.tmp' % (fs_type, image_path), shell=True) + check_call('dd if=%s.tmp of=%s bs=1MiB seek=1 count=%d conv=notrunc' + % (image_path, image_path, 1), shell=True) + check_call('rm %s.tmp' % image_path, shell=True) + loop_dev = check_output('sudo losetup -o 1MiB --sizelimit %dMiB --show -f %s | tr -d "\n"' + % (part_size, image_path), shell=True).decode() + check_output('sudo mount -t %s -o umask=000 %s %s' + % (fs_type, loop_dev, mnt_point), shell=True) + + # Create signature database + ## PK + check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_PK/ -keyout PK.key -out PK.crt -nodes -days 365' + % mnt_point, shell=True) + check_call('cd %s; %scert-to-efi-sig-list -g %s PK.crt PK.esl; %ssign-efi-sig-list -c PK.crt -k PK.key PK PK.esl PK.auth' + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH), + shell=True) + ## KEK + check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_KEK/ -keyout KEK.key -out KEK.crt -nodes -days 365' + % mnt_point, shell=True) + check_call('cd %s; %scert-to-efi-sig-list -g %s KEK.crt KEK.esl; %ssign-efi-sig-list -c PK.crt -k PK.key KEK KEK.esl KEK.auth' + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH), + shell=True) + + # We will have three-tier hierarchy of certificates: + # TestRoot: Root CA (self-signed) + # TestSub: Intermediate CA (signed by Root CA) + # TestCert: User certificate (signed by Intermediate CA, and used + # for signing an image) + # + # NOTE: + # I consulted the following EDK2 document for certificate options: + # BaseTools/Source/Python/Pkcs7Sign/Readme.md + # Please not use them as they are in product system. They are + # for test purpose only. + + # TestRoot + check_call('cp %s/test/py/tests/test_efi_secboot/openssl.cnf %s' % (u_boot_config.source_dir, mnt_point), shell=True) + check_call('cd %s; openssl genrsa -out TestRoot.key 2048; openssl req --config openssl.cnf -extensions v3_ca -new -x509 -days 365 -key TestRoot.key -out TestRoot.crt -subj "/CN=TEST_root/"; touch index.txt' % mnt_point, shell=True) + # TestSub + check_call('cd %s; openssl genrsa -out TestSub.key 2048; openssl req -new -key TestSub.key -out TestSub.csr -subj "/CN=TEST_sub/"; openssl ca --config openssl.cnf -in TestSub.csr -out TestSub.crt -extensions v3_int_ca -days 365 -batch -rand_serial -cert TestRoot.crt -keyfile TestRoot.key' % mnt_point, shell=True) + # TestCert + check_call('cd %s; openssl genrsa -out TestCert.key 2048; openssl req -new -key TestCert.key -out TestCert.csr -subj "/CN=TEST_cert/"; openssl ca --config openssl.cnf -in TestCert.csr -out TestCert.crt -extensions usr_cert -days 365 -batch -rand_serial -cert TestSub.crt -keyfile TestSub.key' % mnt_point, shell=True) + ## db + # for TestCert + check_call('cd %s; %scert-to-efi-sig-list -g %s TestCert.crt TestCert.esl; %ssign-efi-sig-list -c KEK.crt -k KEK.key db TestCert.esl db_a.auth' + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH), + shell=True) + # for TestSub + check_call('cd %s; %scert-to-efi-sig-list -g %s TestSub.crt TestSub.esl; %ssign-efi-sig-list -c KEK.crt -k KEK.key db TestSub.esl db_b.auth' + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH), + shell=True) + # for TestRoot + check_call('cd %s; %scert-to-efi-sig-list -g %s TestRoot.crt TestRoot.esl; %ssign-efi-sig-list -c KEK.crt -k KEK.key db TestRoot.esl db_c.auth' + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH), + shell=True) + ## dbx (hash of certificate with revocation time) + # for TestCert + check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 TestCert.crt TestCert.crl; %ssign-efi-sig-list -c KEK.crt -k KEK.key dbx TestCert.crl dbx_a.auth' + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH), + shell=True) + # for TestSub + check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 TestSub.crt TestSub.crl; %ssign-efi-sig-list -c KEK.crt -k KEK.key dbx TestSub.crl dbx_b.auth' + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH), + shell=True) + # for TestRoot + check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 TestRoot.crt TestRoot.crl; %ssign-efi-sig-list -c KEK.crt -k KEK.key dbx TestRoot.crl dbx_c.auth' + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH), + shell=True) + + # Sign image + # additional intermediate certificates may be included + # in SignedData + + check_call('cp %s %s' % (HELLO_PATH, mnt_point), shell=True) + ## signed by TestCert + check_call('cd %s; %ssbsign --key TestCert.key --cert TestCert.crt --out helloworld.efi.signed_a helloworld.efi' + % (mnt_point, SBSIGN_PATH), shell=True) + ## signed by TestCert with TestSub in signature + check_call('cd %s; %ssbsign --key TestCert.key --cert TestCert.crt --addcert TestSub.crt --out helloworld.efi.signed_ab helloworld.efi' + % (mnt_point, SBSIGN_PATH), shell=True) + ## signed by TestCert with TestSub and TestRoot in signature + check_call('cd %s; cat TestSub.crt TestRoot.crt > TestSubRoot.crt; %ssbsign --key TestCert.key --cert TestCert.crt --addcert TestSubRoot.crt --out helloworld.efi.signed_abc helloworld.efi' + % (mnt_point, SBSIGN_PATH), shell=True) + + # Clean-up + check_call('sudo umount %s' % loop_dev, shell=True) + check_call('sudo losetup -d %s' % loop_dev, shell=True) + + except CalledProcessError as e: + pytest.skip('Setup failed: %s' % e.cmd) + return + else: + yield image_path + finally: + call('rm -f %s' % image_path, shell=True) diff --git a/test/py/tests/test_efi_secboot/defs.py b/test/py/tests/test_efi_secboot/defs.py index 099f453979ff..c61f69a316f8 100644 --- a/test/py/tests/test_efi_secboot/defs.py +++ b/test/py/tests/test_efi_secboot/defs.py @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0+ # Disk image name -EFI_SECBOOT_IMAGE_NAME = 'test_efi_secboot.img' +EFI_SECBOOT_IMAGE_NAME = 'test_efi_secboot' # Size in MiB EFI_SECBOOT_IMAGE_SIZE = 16 @@ -10,12 +10,21 @@ EFI_SECBOOT_PART_SIZE = 8 # Partition file system type EFI_SECBOOT_FS_TYPE = 'vfat' +# Mount point +MNTPNT= 'mnt' + # Owner guid GUID = '11111111-2222-3333-4444-123456789abc' # v1.5.1 or earlier of efitools has a bug in sha256 calculation, and # you need build a newer version on your own. +# The path must terminate with '/'. EFITOOLS_PATH = '' +# "--addcert" option of sbsign must be available, otherwise +# you need build a newer version on your own. +# The path must terminate with '/'. +SBSIGN_PATH= '/home/akashi/arm/misc/sbsigntools/src/' + # Hello World application for sandbox HELLO_PATH = '' diff --git a/test/py/tests/test_efi_secboot/openssl.cnf b/test/py/tests/test_efi_secboot/openssl.cnf new file mode 100644 index 000000000000..f684f1df7e69 --- /dev/null +++ b/test/py/tests/test_efi_secboot/openssl.cnf @@ -0,0 +1,48 @@ +[ ca ] +default_ca = CA_default + +[ CA_default ] +new_certs_dir = . +database = ./index.txt +serial = ./serial +default_md = sha256 +policy = policy_min + +[ req ] +distinguished_name = def_distinguished_name + +[def_distinguished_name] + +# Extensions +# -addext " ... = ..." +# +[ v3_ca ] + # Extensions for a typical Root CA. + basicConstraints = critical,CA:TRUE + keyUsage = critical, digitalSignature, cRLSign, keyCertSign + subjectKeyIdentifier = hash + authorityKeyIdentifier = keyid:always,issuer + +[ v3_int_ca ] + # Extensions for a typical intermediate CA. + basicConstraints = critical, CA:TRUE + keyUsage = critical, digitalSignature, cRLSign, keyCertSign + subjectKeyIdentifier = hash + authorityKeyIdentifier = keyid:always,issuer + +[ usr_cert ] + # Extensions for user end certificates. + basicConstraints = CA:FALSE + keyUsage = critical, nonRepudiation, digitalSignature, keyEncipherment + extendedKeyUsage = clientAuth, emailProtection + subjectKeyIdentifier = hash + authorityKeyIdentifier = keyid,issuer + +[ policy_min ] + countryName = optional + stateOrProvinceName = optional + localityName = optional + organizationName = optional + organizationalUnitName = optional + commonName = supplied + emailAddress = optional diff --git a/test/py/tests/test_efi_secboot/test_signed_intca.py b/test/py/tests/test_efi_secboot/test_signed_intca.py new file mode 100644 index 000000000000..80c1917a2cd3 --- /dev/null +++ b/test/py/tests/test_efi_secboot/test_signed_intca.py @@ -0,0 +1,134 @@ +# SPDX-License-Identifier: GPL-2.0+ +# Copyright (c) 2020, Linaro Limited +# Author: AKASHI Takahiro +# +# U-Boot UEFI: Image Authentication Test (signature with certificates chain) + +""" +This test verifies image authentication for a signed image which is signed +by user certificate and contains additional intermediate certificates in its +signature. +""" + +import pytest + +@pytest.mark.boardspec('sandbox') +@pytest.mark.buildconfigspec('efi_secure_boot') +@pytest.mark.buildconfigspec('cmd_efidebug') +@pytest.mark.buildconfigspec('cmd_fat') +@pytest.mark.buildconfigspec('cmd_nvedit_efi') +@pytest.mark.slow +class TestEfiSignedImageExt(object): + def test_efi_signed_image_ext1(self, u_boot_console, efi_boot_env_intca): + """ + Test Case 1 - authenticated by root CA in db + """ + u_boot_console.restart_uboot() + disk_img = efi_boot_env_intca + with u_boot_console.log.section('Test Case 1a'): + # Test Case 1a, with no Int CA and not authenticated by root CA + output = u_boot_console.run_command_list([ + 'host bind 0 %s' % disk_img, + 'fatload host 0:1 4000000 db_c.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db', + 'fatload host 0:1 4000000 KEK.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize KEK', + 'fatload host 0:1 4000000 PK.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK']) + assert 'Failed to set EFI variable' not in ''.join(output) + + output = u_boot_console.run_command_list([ + 'efidebug boot add 1 HELLO_a host 0:1 /helloworld.efi.signed_a ""', + 'efidebug boot next 1', + 'efidebug test bootmgr']) + assert '\'HELLO_a\' failed' in ''.join(output) + assert 'efi_start_image() returned: 26' in ''.join(output) + + with u_boot_console.log.section('Test Case 1b'): + # Test Case 1b, signed and authenticated by root CA + output = u_boot_console.run_command_list([ + 'efidebug boot add 2 HELLO_ab host 0:1 /helloworld.efi.signed_ab ""', + 'efidebug boot next 2', + 'bootefi bootmgr']) + assert 'Hello, world!' in ''.join(output) + + def test_efi_signed_image_ext2(self, u_boot_console, efi_boot_env_intca): + """ + Test Case 2 - authenticated by root CA in db + """ + u_boot_console.restart_uboot() + disk_img = efi_boot_env_intca + with u_boot_console.log.section('Test Case 2a'): + # Test Case 2a, unsigned and not authenticated by root CA + output = u_boot_console.run_command_list([ + 'host bind 0 %s' % disk_img, + 'fatload host 0:1 4000000 KEK.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize KEK', + 'fatload host 0:1 4000000 PK.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK']) + assert 'Failed to set EFI variable' not in ''.join(output) + + output = u_boot_console.run_command_list([ + 'efidebug boot add 1 HELLO_abc host 0:1 /helloworld.efi.signed_abc ""', + 'efidebug boot next 1', + 'efidebug test bootmgr']) + assert '\'HELLO_abc\' failed' in ''.join(output) + assert 'efi_start_image() returned: 26' in ''.join(output) + + with u_boot_console.log.section('Test Case 2b'): + # Test Case 2b, signed and authenticated by root CA + output = u_boot_console.run_command_list([ + 'fatload host 0:1 4000000 db_b.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db', + 'efidebug boot next 1', + 'efidebug test bootmgr']) + assert '\'HELLO_abc\' failed' in ''.join(output) + assert 'efi_start_image() returned: 26' in ''.join(output) + + with u_boot_console.log.section('Test Case 2c'): + # Test Case 2c, signed and authenticated by root CA + output = u_boot_console.run_command_list([ + 'fatload host 0:1 4000000 db_c.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db', + 'efidebug boot next 1', + 'efidebug test bootmgr']) + assert 'Hello, world!' in ''.join(output) + + def test_efi_signed_image_ext3(self, u_boot_console, efi_boot_env_intca): + """ + Test Case 3 - revoked by dbx + """ + u_boot_console.restart_uboot() + disk_img = efi_boot_env_intca + with u_boot_console.log.section('Test Case 3a'): + # Test Case 3a, revoked by root CA in dbx + output = u_boot_console.run_command_list([ + 'host bind 0 %s' % disk_img, + 'fatload host 0:1 4000000 dbx_c.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize dbx', + 'fatload host 0:1 4000000 db_c.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db', + 'fatload host 0:1 4000000 KEK.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize KEK', + 'fatload host 0:1 4000000 PK.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK']) + assert 'Failed to set EFI variable' not in ''.join(output) + + output = u_boot_console.run_command_list([ + 'efidebug boot add 1 HELLO_abc host 0:1 /helloworld.efi.signed_abc ""', + 'efidebug boot next 1', + 'efidebug test bootmgr']) + assert '\'HELLO_abc\' failed' in ''.join(output) + assert 'efi_start_image() returned: 26' in ''.join(output) + + with u_boot_console.log.section('Test Case 3b'): + # Test Case 3b, revoked by int CA in dbx + output = u_boot_console.run_command_list([ + 'fatload host 0:1 4000000 dbx_b.auth', + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize dbx', + 'efidebug boot next 1', + 'efidebug test bootmgr']) + assert 'Hello, world!' in ''.join(output) + # Or, + # assert('\'HELLO_abc\' failed' in ''.join(output)) + # assert('efi_start_image() returned: 26' in ''.join(output))