#!/usr/bin/python

# vim:set et sw=4:

#

# certdata2pem.py - splits certdata.txt into multiple files

#

# Copyright (C) 2009 Philipp Kern <pkern@debian.org>

# Copyright (C) 2013 Kai Engert <kaie@redhat.com>

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,

# USA.

import base64

import os.path

import re

import sys

import textwrap

import urllib.request, urllib.parse, urllib.error

import subprocess

objects = []

def printable_serial(obj):

  return ".".join([str(x) for x in obj['CKA_SERIAL_NUMBER']])

# Dirty file parser.

in_data, in_multiline, in_obj = False, False, False

field, ftype, value, binval, obj = None, None, None, bytearray(), dict()

for line in open('certdata.txt', 'r'):

    # Ignore the file header.

    if not in_data:

        if line.startswith('BEGINDATA'):

            in_data = True

        continue

    # Ignore comment lines.

    if line.startswith('#'):

        continue

    # Empty lines are significant if we are inside an object.

    if in_obj and len(line.strip()) == 0:

        objects.append(obj)

        obj = dict()

        in_obj = False

        continue

    if len(line.strip()) == 0:

        continue

    if in_multiline:

        if not line.startswith('END'):

            if ftype == 'MULTILINE_OCTAL':

                line = line.strip()

                for i in re.finditer(r'\\([0-3][0-7][0-7])', line):

                    integ = int(i.group(1), 8)

                    binval.extend((integ).to_bytes(1, sys.byteorder))

                obj[field] = binval

            else:

                value += line

                obj[field] = value

            continue

        in_multiline = False

        continue

    if line.startswith('CKA_CLASS'):

        in_obj = True

    line_parts = line.strip().split(' ', 2)

    if len(line_parts) > 2:

        field, ftype = line_parts[0:2]

        value = ' '.join(line_parts[2:])

    elif len(line_parts) == 2:

        field, ftype = line_parts

        value = None

    else:

        raise NotImplementedError('line_parts < 2 not supported.\n' + line)

    if ftype == 'MULTILINE_OCTAL':

        in_multiline = True

        value = ""

        binval = bytearray()

        continue

    obj[field] = value

if len(list(obj.items())) > 0:

    objects.append(obj)

# Build up trust database.

trustmap = dict()

for obj in objects:

    if obj['CKA_CLASS'] != 'CKO_NSS_TRUST':

        continue

    key = obj['CKA_LABEL'] + printable_serial(obj)

    trustmap[key] = obj

    print(" added trust", key)

# Build up cert database.

certmap = dict()

for obj in objects:

    if obj['CKA_CLASS'] != 'CKO_CERTIFICATE':

        continue

    key = obj['CKA_LABEL'] + printable_serial(obj)

    certmap[key] = obj

    print(" added cert", key)

def obj_to_filename(obj):

    label = obj['CKA_LABEL'][1:-1]

    label = label.replace('/', '_')\

        .replace(' ', '_')\

        .replace('(', '=')\

        .replace(')', '=')\

        .replace(',', '_')

    labelbytes = bytearray()

    i = 0

    imax = len(label)

    while i < imax:

        if i < imax-3 and label[i] == '\\' and label[i+1] == 'x':

            labelbytes.extend(bytes.fromhex(label[i+2:i+4]))

            i += 4

            continue

        labelbytes.extend(str.encode(label[i]))

        i = i+1

        continue

    label = labelbytes.decode('utf-8')

    serial = printable_serial(obj)

    return label + ":" + serial

def write_cert_ext_to_file(f, oid, value, public_key):

    f.write("[p11-kit-object-v1]\n")

    f.write("label: ");

    f.write(tobj['CKA_LABEL'])

    f.write("\n")

    f.write("class: x-certificate-extension\n");

    f.write("object-id: " + oid + "\n")

    f.write("value: \"" + value + "\"\n")

    f.write("modifiable: false\n");

    f.write(public_key)

trust_types = {

  "CKA_TRUST_DIGITAL_SIGNATURE": "digital-signature",

  "CKA_TRUST_NON_REPUDIATION": "non-repudiation",

  "CKA_TRUST_KEY_ENCIPHERMENT": "key-encipherment",

  "CKA_TRUST_DATA_ENCIPHERMENT": "data-encipherment",

  "CKA_TRUST_KEY_AGREEMENT": "key-agreement",

  "CKA_TRUST_KEY_CERT_SIGN": "cert-sign",

  "CKA_TRUST_CRL_SIGN": "crl-sign",

  "CKA_TRUST_SERVER_AUTH": "server-auth",

  "CKA_TRUST_CLIENT_AUTH": "client-auth",

  "CKA_TRUST_CODE_SIGNING": "code-signing",

  "CKA_TRUST_EMAIL_PROTECTION": "email-protection",

  "CKA_TRUST_IPSEC_END_SYSTEM": "ipsec-end-system",

  "CKA_TRUST_IPSEC_TUNNEL": "ipsec-tunnel",

  "CKA_TRUST_IPSEC_USER": "ipsec-user",

  "CKA_TRUST_TIME_STAMPING": "time-stamping",

  "CKA_TRUST_STEP_UP_APPROVED": "step-up-approved",

}

legacy_trust_types = {

  "LEGACY_CKA_TRUST_SERVER_AUTH": "server-auth",

  "LEGACY_CKA_TRUST_CODE_SIGNING": "code-signing",

  "LEGACY_CKA_TRUST_EMAIL_PROTECTION": "email-protection",

}

legacy_to_real_trust_types = {

  "LEGACY_CKA_TRUST_SERVER_AUTH": "CKA_TRUST_SERVER_AUTH",

  "LEGACY_CKA_TRUST_CODE_SIGNING": "CKA_TRUST_CODE_SIGNING",

  "LEGACY_CKA_TRUST_EMAIL_PROTECTION": "CKA_TRUST_EMAIL_PROTECTION",

}

openssl_trust = {

  "CKA_TRUST_SERVER_AUTH": "serverAuth",

  "CKA_TRUST_CLIENT_AUTH": "clientAuth",

  "CKA_TRUST_CODE_SIGNING": "codeSigning",

  "CKA_TRUST_EMAIL_PROTECTION": "emailProtection",

}

cert_distrust_types = {

  "CKA_NSS_SERVER_DISTRUST_AFTER": "nss-server-distrust-after",

  "CKA_NSS_EMAIL_DISTRUST_AFTER": "nss-email-distrust-after",

}

for tobj in objects:

    if tobj['CKA_CLASS'] == 'CKO_NSS_TRUST':

        key = tobj['CKA_LABEL'] + printable_serial(tobj)

        print("producing trust for " + key)

        trustbits = []

        distrustbits = []

        openssl_trustflags = []

        openssl_distrustflags = []

        legacy_trustbits = []

        legacy_openssl_trustflags = []

        for t in list(trust_types.keys()):

            if t in tobj and tobj[t] == 'CKT_NSS_TRUSTED_DELEGATOR':

                trustbits.append(t)

                if t in openssl_trust:

                    openssl_trustflags.append(openssl_trust[t])

            if t in tobj and tobj[t] == 'CKT_NSS_NOT_TRUSTED':

                distrustbits.append(t)

                if t in openssl_trust:

                    openssl_distrustflags.append(openssl_trust[t])

        for t in list(legacy_trust_types.keys()):

            if t in tobj and tobj[t] == 'CKT_NSS_TRUSTED_DELEGATOR':

                real_t = legacy_to_real_trust_types[t]

                legacy_trustbits.append(real_t)

                if real_t in openssl_trust:

                    legacy_openssl_trustflags.append(openssl_trust[real_t])

            if t in tobj and tobj[t] == 'CKT_NSS_NOT_TRUSTED':

                raise NotImplementedError('legacy distrust not supported.\n' + line)

        fname = obj_to_filename(tobj)

        try:

            obj = certmap[key]

        except:

            obj = None

        # optional debug code, that dumps the parsed input to files

        #fulldump = "dump-" + fname

        #dumpf = open(fulldump, 'w')

        #dumpf.write(str(obj));

        #dumpf.write(str(tobj));

        #dumpf.close();

        is_legacy = 0

        if 'LEGACY_CKA_TRUST_SERVER_AUTH' in tobj or 'LEGACY_CKA_TRUST_EMAIL_PROTECTION' in tobj or 'LEGACY_CKA_TRUST_CODE_SIGNING' in tobj:

            is_legacy = 1

            if obj == None:

                raise NotImplementedError('found legacy trust without certificate.\n' + line)

            legacy_fname = "legacy-default/" + fname + ".crt"

            f = open(legacy_fname, 'w')

            f.write("# alias=%s\n"%tobj['CKA_LABEL'])

            f.write("# trust=" + " ".join(legacy_trustbits) + "\n")

            if legacy_openssl_trustflags:

                f.write("# openssl-trust=" + " ".join(legacy_openssl_trustflags) + "\n")

            f.write("-----BEGIN CERTIFICATE-----\n")

            temp_encoded_b64 = base64.b64encode(obj['CKA_VALUE'])

            temp_wrapped = textwrap.wrap(temp_encoded_b64.decode(), 64)

            f.write("\n".join(temp_wrapped))

            f.write("\n-----END CERTIFICATE-----\n")

            f.close()

            if 'CKA_TRUST_SERVER_AUTH' in tobj or 'CKA_TRUST_EMAIL_PROTECTION' in tobj or 'CKA_TRUST_CODE_SIGNING' in tobj:

                legacy_fname = "legacy-disable/" + fname + ".crt"

                f = open(legacy_fname, 'w')

                f.write("# alias=%s\n"%tobj['CKA_LABEL'])

                f.write("# trust=" + " ".join(trustbits) + "\n")

                if openssl_trustflags:

                    f.write("# openssl-trust=" + " ".join(openssl_trustflags) + "\n")

                f.write("-----BEGIN CERTIFICATE-----\n")

                f.write("\n".join(textwrap.wrap(base64.b64encode(obj['CKA_VALUE']), 64)))

                f.write("\n-----END CERTIFICATE-----\n")

                f.close()

            # don't produce p11-kit output for legacy certificates

            continue

        pk = ''

        cert_comment = ''

        if obj != None:

            # must extract the public key from the cert, let's use openssl

            cert_fname = "cert-" + fname

            fc = open(cert_fname, 'w')

            fc.write("-----BEGIN CERTIFICATE-----\n")

            temp_encoded_b64 = base64.b64encode(obj['CKA_VALUE'])

            temp_wrapped = textwrap.wrap(temp_encoded_b64.decode(), 64)

            fc.write("\n".join(temp_wrapped))

            fc.write("\n-----END CERTIFICATE-----\n")

            fc.close();

            pk_fname = "pubkey-" + fname

            fpkout = open(pk_fname, "w")

            dump_pk_command = ["openssl", "x509", "-in", cert_fname, "-noout", "-pubkey"]

            subprocess.call(dump_pk_command, stdout=fpkout)

            fpkout.close()

            with open (pk_fname, "r") as myfile:

                pk=myfile.read()

            # obtain certificate information suitable as a comment

            comment_fname = "comment-" + fname

            fcout = open(comment_fname, "w")

            comment_command = ["openssl", "x509", "-in", cert_fname, "-noout", "-text"]

            subprocess.call(comment_command, stdout=fcout)

            fcout.close()

            sed_command = ["sed", "--in-place", "s/^/#/", comment_fname]

            subprocess.call(sed_command)

            with open (comment_fname, "r", errors = 'replace') as myfile:

                cert_comment=myfile.read()

        fname += ".tmp-p11-kit"

        f = open(fname, 'w')

        if obj != None:

            is_distrusted = False

            has_server_trust = False

            has_email_trust = False

            has_code_trust = False

            if 'CKA_TRUST_SERVER_AUTH' in tobj:

                if tobj['CKA_TRUST_SERVER_AUTH'] == 'CKT_NSS_NOT_TRUSTED':

                    is_distrusted = True

                elif tobj['CKA_TRUST_SERVER_AUTH'] == 'CKT_NSS_TRUSTED_DELEGATOR':

                    has_server_trust = True

            if 'CKA_TRUST_EMAIL_PROTECTION' in tobj:

                if tobj['CKA_TRUST_EMAIL_PROTECTION'] == 'CKT_NSS_NOT_TRUSTED':

                    is_distrusted = True

                elif tobj['CKA_TRUST_EMAIL_PROTECTION'] == 'CKT_NSS_TRUSTED_DELEGATOR':

                    has_email_trust = True

            if 'CKA_TRUST_CODE_SIGNING' in tobj:

                if tobj['CKA_TRUST_CODE_SIGNING'] == 'CKT_NSS_NOT_TRUSTED':

                    is_distrusted = True

                elif tobj['CKA_TRUST_CODE_SIGNING'] == 'CKT_NSS_TRUSTED_DELEGATOR':

                    has_code_trust = True

            if is_distrusted:

                trust_ext_oid = "1.3.6.1.4.1.3319.6.10.1"

                trust_ext_value = "0.%06%0a%2b%06%01%04%01%99w%06%0a%01%04 0%1e%06%08%2b%06%01%05%05%07%03%04%06%08%2b%06%01%05%05%07%03%01%06%08%2b%06%01%05%05%07%03%03"

                write_cert_ext_to_file(f, trust_ext_oid, trust_ext_value, pk)

            trust_ext_oid = "2.5.29.37"

            if has_server_trust:

                if has_email_trust:

                    if has_code_trust:

                        # server + email + code

                        trust_ext_value = "0%2a%06%03U%1d%25%01%01%ff%04 0%1e%06%08%2b%06%01%05%05%07%03%04%06%08%2b%06%01%05%05%07%03%01%06%08%2b%06%01%05%05%07%03%03"

                    else:

                        # server + email

                        trust_ext_value = "0 %06%03U%1d%25%01%01%ff%04%160%14%06%08%2b%06%01%05%05%07%03%04%06%08%2b%06%01%05%05%07%03%01"

                else:

                    if has_code_trust:

                        # server + code

                        trust_ext_value = "0 %06%03U%1d%25%01%01%ff%04%160%14%06%08%2b%06%01%05%05%07%03%01%06%08%2b%06%01%05%05%07%03%03"

                    else:

                        # server

                        trust_ext_value = "0%16%06%03U%1d%25%01%01%ff%04%0c0%0a%06%08%2b%06%01%05%05%07%03%01"

            else:

                if has_email_trust:

                    if has_code_trust:

                        # email + code

                        trust_ext_value = "0 %06%03U%1d%25%01%01%ff%04%160%14%06%08%2b%06%01%05%05%07%03%04%06%08%2b%06%01%05%05%07%03%03"

                    else:

                        # email

                        trust_ext_value = "0%16%06%03U%1d%25%01%01%ff%04%0c0%0a%06%08%2b%06%01%05%05%07%03%04"

                else:

                    if has_code_trust:

                        # code

                        trust_ext_value = "0%16%06%03U%1d%25%01%01%ff%04%0c0%0a%06%08%2b%06%01%05%05%07%03%03"

                    else:

                        # none

                        trust_ext_value = "0%18%06%03U%1d%25%01%01%ff%04%0e0%0c%06%0a%2b%06%01%04%01%99w%06%0a%10"

            # no 2.5.29.37 for neutral certificates

            if (is_distrusted or has_server_trust or has_email_trust or has_code_trust):

                write_cert_ext_to_file(f, trust_ext_oid, trust_ext_value, pk)

            pk = ''

            f.write("\n")

            f.write("[p11-kit-object-v1]\n")

            f.write("label: ");

            f.write(tobj['CKA_LABEL'])

            f.write("\n")

            if is_distrusted:

                f.write("x-distrusted: true\n")

            elif has_server_trust or has_email_trust or has_code_trust:

                f.write("trusted: true\n")

            else:

                f.write("trusted: false\n")

            # requires p11-kit >= 0.23.4

            f.write("nss-mozilla-ca-policy: true\n")

            f.write("modifiable: false\n");

            # requires p11-kit >= 0.23.19

            for t in list(cert_distrust_types.keys()):

                if t in obj:

                    value = obj[t]

                    if value == 'CK_FALSE':

                        value = bytearray(1)

                    f.write(cert_distrust_types[t] + ": \"")

                    f.write(urllib.parse.quote(value));

                    f.write("\"\n")

            f.write("-----BEGIN CERTIFICATE-----\n")

            temp_encoded_b64 = base64.b64encode(obj['CKA_VALUE'])

            temp_wrapped = textwrap.wrap(temp_encoded_b64.decode(), 64)

            f.write("\n".join(temp_wrapped))

            f.write("\n-----END CERTIFICATE-----\n")

            f.write(cert_comment)

            f.write("\n")

        else:

            f.write("[p11-kit-object-v1]\n")

            f.write("label: ");

            f.write(tobj['CKA_LABEL']);

            f.write("\n")

            f.write("class: certificate\n")

            f.write("certificate-type: x-509\n")

            f.write("modifiable: false\n");

            f.write("issuer: \"");

            f.write(urllib.parse.quote(tobj['CKA_ISSUER']));

            f.write("\"\n")

            f.write("serial-number: \"");

            f.write(urllib.parse.quote(tobj['CKA_SERIAL_NUMBER']));

            f.write("\"\n")

            if (tobj['CKA_TRUST_SERVER_AUTH'] == 'CKT_NSS_NOT_TRUSTED') or (tobj['CKA_TRUST_EMAIL_PROTECTION'] == 'CKT_NSS_NOT_TRUSTED') or (tobj['CKA_TRUST_CODE_SIGNING'] == 'CKT_NSS_NOT_TRUSTED'):

              f.write("x-distrusted: true\n")

            f.write("\n\n")

        f.close()

        print(" -> written as '%s', trust = %s, openssl-trust = %s, distrust = %s, openssl-distrust = %s" % (fname, trustbits, openssl_trustflags, distrustbits, openssl_distrustflags))