| # SPDX-License-Identifier: GPL-2.0+ |
| # Copyright 2022 Google LLC |
| # |
| """Bintool implementation for openssl |
| |
| openssl provides a number of features useful for signing images |
| |
| Documentation is at https://www.coreboot.org/CBFS |
| |
| Source code is at https://www.openssl.org/ |
| """ |
| |
| import hashlib |
| |
| from binman import bintool |
| from u_boot_pylib import tools |
| |
| |
| VALID_SHAS = [256, 384, 512, 224] |
| SHA_OIDS = {256:'2.16.840.1.101.3.4.2.1', |
| 384:'2.16.840.1.101.3.4.2.2', |
| 512:'2.16.840.1.101.3.4.2.3', |
| 224:'2.16.840.1.101.3.4.2.4'} |
| |
| class Bintoolopenssl(bintool.Bintool): |
| """openssl tool |
| |
| This bintool supports creating new openssl certificates. |
| |
| It also supports fetching a binary openssl |
| |
| Documentation about openssl is at https://www.openssl.org/ |
| """ |
| def __init__(self, name): |
| super().__init__( |
| name, 'openssl cryptography toolkit', |
| version_regex=r'OpenSSL (.*) \(', version_args='version') |
| |
| def x509_cert(self, cert_fname, input_fname, key_fname, cn, revision, |
| config_fname): |
| """Create a certificate |
| |
| Args: |
| cert_fname (str): Filename of certificate to create |
| input_fname (str): Filename containing data to sign |
| key_fname (str): Filename of .pem file |
| cn (str): Common name |
| revision (int): Revision number |
| config_fname (str): Filename to write fconfig into |
| |
| Returns: |
| str: Tool output |
| """ |
| indata = tools.read_file(input_fname) |
| hashval = hashlib.sha512(indata).hexdigest() |
| with open(config_fname, 'w', encoding='utf-8') as outf: |
| print(f'''[ req ] |
| distinguished_name = req_distinguished_name |
| x509_extensions = v3_ca |
| prompt = no |
| dirstring_type = nobmp |
| |
| [ req_distinguished_name ] |
| CN = {cert_fname} |
| |
| [ v3_ca ] |
| basicConstraints = CA:true |
| 1.3.6.1.4.1.294.1.3 = ASN1:SEQUENCE:swrv |
| 1.3.6.1.4.1.294.1.34 = ASN1:SEQUENCE:sysfw_image_integrity |
| |
| [ swrv ] |
| swrv = INTEGER:{revision} |
| |
| [ sysfw_image_integrity ] |
| shaType = OID:2.16.840.1.101.3.4.2.3 |
| shaValue = FORMAT:HEX,OCT:{hashval} |
| imageSize = INTEGER:{len(indata)} |
| ''', file=outf) |
| args = ['req', '-new', '-x509', '-key', key_fname, '-nodes', |
| '-outform', 'DER', '-out', cert_fname, '-config', config_fname, |
| '-sha512'] |
| return self.run_cmd(*args) |
| |
| def x509_cert_sysfw(self, cert_fname, input_fname, key_fname, sw_rev, |
| config_fname, req_dist_name_dict): |
| """Create a certificate to be booted by system firmware |
| |
| Args: |
| cert_fname (str): Filename of certificate to create |
| input_fname (str): Filename containing data to sign |
| key_fname (str): Filename of .pem file |
| sw_rev (int): Software revision |
| config_fname (str): Filename to write fconfig into |
| req_dist_name_dict (dict): Dictionary containing key-value pairs of |
| req_distinguished_name section extensions, must contain extensions for |
| C, ST, L, O, OU, CN and emailAddress |
| |
| Returns: |
| str: Tool output |
| """ |
| indata = tools.read_file(input_fname) |
| hashval = hashlib.sha512(indata).hexdigest() |
| with open(config_fname, 'w', encoding='utf-8') as outf: |
| print(f'''[ req ] |
| distinguished_name = req_distinguished_name |
| x509_extensions = v3_ca |
| prompt = no |
| dirstring_type = nobmp |
| |
| [ req_distinguished_name ] |
| C = {req_dist_name_dict['C']} |
| ST = {req_dist_name_dict['ST']} |
| L = {req_dist_name_dict['L']} |
| O = {req_dist_name_dict['O']} |
| OU = {req_dist_name_dict['OU']} |
| CN = {req_dist_name_dict['CN']} |
| emailAddress = {req_dist_name_dict['emailAddress']} |
| |
| [ v3_ca ] |
| basicConstraints = CA:true |
| 1.3.6.1.4.1.294.1.3 = ASN1:SEQUENCE:swrv |
| 1.3.6.1.4.1.294.1.34 = ASN1:SEQUENCE:sysfw_image_integrity |
| 1.3.6.1.4.1.294.1.35 = ASN1:SEQUENCE:sysfw_image_load |
| |
| [ swrv ] |
| swrv = INTEGER:{sw_rev} |
| |
| [ sysfw_image_integrity ] |
| shaType = OID:2.16.840.1.101.3.4.2.3 |
| shaValue = FORMAT:HEX,OCT:{hashval} |
| imageSize = INTEGER:{len(indata)} |
| |
| [ sysfw_image_load ] |
| destAddr = FORMAT:HEX,OCT:00000000 |
| authInPlace = INTEGER:2 |
| ''', file=outf) |
| args = ['req', '-new', '-x509', '-key', key_fname, '-nodes', |
| '-outform', 'DER', '-out', cert_fname, '-config', config_fname, |
| '-sha512'] |
| return self.run_cmd(*args) |
| |
| def x509_cert_rom(self, cert_fname, input_fname, key_fname, sw_rev, |
| config_fname, req_dist_name_dict, cert_type, bootcore, |
| bootcore_opts, load_addr, sha): |
| """Create a certificate |
| |
| Args: |
| cert_fname (str): Filename of certificate to create |
| input_fname (str): Filename containing data to sign |
| key_fname (str): Filename of .pem file |
| sw_rev (int): Software revision |
| config_fname (str): Filename to write fconfig into |
| req_dist_name_dict (dict): Dictionary containing key-value pairs of |
| req_distinguished_name section extensions, must contain extensions for |
| C, ST, L, O, OU, CN and emailAddress |
| cert_type (int): Certification type |
| bootcore (int): Booting core |
| bootcore_opts(int): Booting core option, lockstep (0) or split (2) mode |
| load_addr (int): Load address of image |
| sha (int): Hash function |
| |
| Returns: |
| str: Tool output |
| """ |
| indata = tools.read_file(input_fname) |
| hashval = hashlib.sha512(indata).hexdigest() |
| with open(config_fname, 'w', encoding='utf-8') as outf: |
| print(f''' |
| [ req ] |
| distinguished_name = req_distinguished_name |
| x509_extensions = v3_ca |
| prompt = no |
| dirstring_type = nobmp |
| |
| [ req_distinguished_name ] |
| C = {req_dist_name_dict['C']} |
| ST = {req_dist_name_dict['ST']} |
| L = {req_dist_name_dict['L']} |
| O = {req_dist_name_dict['O']} |
| OU = {req_dist_name_dict['OU']} |
| CN = {req_dist_name_dict['CN']} |
| emailAddress = {req_dist_name_dict['emailAddress']} |
| |
| [ v3_ca ] |
| basicConstraints = CA:true |
| 1.3.6.1.4.1.294.1.1 = ASN1:SEQUENCE:boot_seq |
| 1.3.6.1.4.1.294.1.2 = ASN1:SEQUENCE:image_integrity |
| 1.3.6.1.4.1.294.1.3 = ASN1:SEQUENCE:swrv |
| # 1.3.6.1.4.1.294.1.4 = ASN1:SEQUENCE:encryption |
| 1.3.6.1.4.1.294.1.8 = ASN1:SEQUENCE:debug |
| |
| [ boot_seq ] |
| certType = INTEGER:{cert_type} |
| bootCore = INTEGER:{bootcore} |
| bootCoreOpts = INTEGER:{bootcore_opts} |
| destAddr = FORMAT:HEX,OCT:{load_addr:08x} |
| imageSize = INTEGER:{len(indata)} |
| |
| [ image_integrity ] |
| shaType = OID:{SHA_OIDS[sha]} |
| shaValue = FORMAT:HEX,OCT:{hashval} |
| |
| [ swrv ] |
| swrv = INTEGER:{sw_rev} |
| |
| # [ encryption ] |
| # initalVector = FORMAT:HEX,OCT:TEST_IMAGE_ENC_IV |
| # randomString = FORMAT:HEX,OCT:TEST_IMAGE_ENC_RS |
| # iterationCnt = INTEGER:TEST_IMAGE_KEY_DERIVE_INDEX |
| # salt = FORMAT:HEX,OCT:TEST_IMAGE_KEY_DERIVE_SALT |
| |
| [ debug ] |
| debugUID = FORMAT:HEX,OCT:0000000000000000000000000000000000000000000000000000000000000000 |
| debugType = INTEGER:4 |
| coreDbgEn = INTEGER:0 |
| coreDbgSecEn = INTEGER:0 |
| ''', file=outf) |
| args = ['req', '-new', '-x509', '-key', key_fname, '-nodes', |
| '-outform', 'DER', '-out', cert_fname, '-config', config_fname, |
| '-sha512'] |
| return self.run_cmd(*args) |
| |
| def x509_cert_rom_combined(self, cert_fname, input_fname, key_fname, sw_rev, |
| config_fname, req_dist_name_dict, load_addr, sha, total_size, num_comps, |
| sysfw_inner_cert_ext_boot_sequence_string, dm_data_ext_boot_sequence_string, |
| imagesize_sbl, hashval_sbl, load_addr_sysfw, imagesize_sysfw, |
| hashval_sysfw, load_addr_sysfw_data, imagesize_sysfw_data, |
| hashval_sysfw_data, sysfw_inner_cert_ext_boot_block, |
| dm_data_ext_boot_block, bootcore_opts): |
| """Create a certificate |
| |
| Args: |
| cert_fname (str): Filename of certificate to create |
| input_fname (str): Filename containing data to sign |
| key_fname (str): Filename of .pem file |
| sw_rev (int): Software revision |
| config_fname (str): Filename to write fconfig into |
| req_dist_name_dict (dict): Dictionary containing key-value pairs of |
| req_distinguished_name section extensions, must contain extensions for |
| C, ST, L, O, OU, CN and emailAddress |
| cert_type (int): Certification type |
| bootcore (int): Booting core |
| load_addr (int): Load address of image |
| sha (int): Hash function |
| bootcore_opts (int): Booting core option, lockstep (0) or split (2) mode |
| |
| Returns: |
| str: Tool output |
| """ |
| indata = tools.read_file(input_fname) |
| hashval = hashlib.sha512(indata).hexdigest() |
| sha_type = SHA_OIDS[sha] |
| with open(config_fname, 'w', encoding='utf-8') as outf: |
| print(f''' |
| [ req ] |
| distinguished_name = req_distinguished_name |
| x509_extensions = v3_ca |
| prompt = no |
| dirstring_type = nobmp |
| |
| [ req_distinguished_name ] |
| C = {req_dist_name_dict['C']} |
| ST = {req_dist_name_dict['ST']} |
| L = {req_dist_name_dict['L']} |
| O = {req_dist_name_dict['O']} |
| OU = {req_dist_name_dict['OU']} |
| CN = {req_dist_name_dict['CN']} |
| emailAddress = {req_dist_name_dict['emailAddress']} |
| |
| [ v3_ca ] |
| basicConstraints = CA:true |
| 1.3.6.1.4.1.294.1.3=ASN1:SEQUENCE:swrv |
| 1.3.6.1.4.1.294.1.9=ASN1:SEQUENCE:ext_boot_info |
| |
| [swrv] |
| swrv=INTEGER:{sw_rev} |
| |
| [ext_boot_info] |
| extImgSize=INTEGER:{total_size} |
| numComp=INTEGER:{num_comps} |
| sbl=SEQUENCE:sbl |
| sysfw=SEQUENCE:sysfw |
| sysfw_data=SEQUENCE:sysfw_data |
| {sysfw_inner_cert_ext_boot_sequence_string} |
| {dm_data_ext_boot_sequence_string} |
| |
| [sbl] |
| compType = INTEGER:1 |
| bootCore = INTEGER:16 |
| compOpts = INTEGER:{bootcore_opts} |
| destAddr = FORMAT:HEX,OCT:{load_addr:08x} |
| compSize = INTEGER:{imagesize_sbl} |
| shaType = OID:{sha_type} |
| shaValue = FORMAT:HEX,OCT:{hashval_sbl} |
| |
| [sysfw] |
| compType = INTEGER:2 |
| bootCore = INTEGER:0 |
| compOpts = INTEGER:0 |
| destAddr = FORMAT:HEX,OCT:{load_addr_sysfw:08x} |
| compSize = INTEGER:{imagesize_sysfw} |
| shaType = OID:{sha_type} |
| shaValue = FORMAT:HEX,OCT:{hashval_sysfw} |
| |
| [sysfw_data] |
| compType = INTEGER:18 |
| bootCore = INTEGER:0 |
| compOpts = INTEGER:0 |
| destAddr = FORMAT:HEX,OCT:{load_addr_sysfw_data:08x} |
| compSize = INTEGER:{imagesize_sysfw_data} |
| shaType = OID:{sha_type} |
| shaValue = FORMAT:HEX,OCT:{hashval_sysfw_data} |
| |
| {sysfw_inner_cert_ext_boot_block} |
| |
| {dm_data_ext_boot_block} |
| ''', file=outf) |
| args = ['req', '-new', '-x509', '-key', key_fname, '-nodes', |
| '-outform', 'DER', '-out', cert_fname, '-config', config_fname, |
| '-sha512'] |
| return self.run_cmd(*args) |
| |
| def fetch(self, method): |
| """Fetch handler for openssl |
| |
| This installs the openssl package using the apt utility. |
| |
| Args: |
| method (FETCH_...): Method to use |
| |
| Returns: |
| True if the file was fetched and now installed, None if a method |
| other than FETCH_BIN was requested |
| |
| Raises: |
| Valuerror: Fetching could not be completed |
| """ |
| if method != bintool.FETCH_BIN: |
| return None |
| return self.apt_install('openssl') |