1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
#!/usr/bin/env vpython3
# -*- coding:utf-8 -*-
# Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
#
# Use of this source code is governed by a BSD-style license
# that can be found in the LICENSE file in the root of the source
# tree. An additional intellectual property rights grant can be found
# in the file PATENTS. All contributing project authors may
# be found in the AUTHORS file in the root of the source tree.
"""This is a tool to transform a crt file into a C/C++ header.
Usage:
python3 generate_sslroots.py certfile.pem [--verbose | -v] [--full_cert | -f]
Arguments:
-v Print output while running.
-f Add public key and certificate name. Default is to skip and reduce
generated file size.
The supported cert files are:
- Google: https://pki.goog/roots.pem
- Mozilla: https://curl.se/docs/caextract.html
"""
import subprocess
from optparse import OptionParser
import os
import re
_GENERATED_FILE = 'ssl_roots.h'
_PREFIX = '__generated__'
_EXTENSION = '.crt'
_SUBJECT_NAME_ARRAY = 'subject_name'
_SUBJECT_NAME_VARIABLE = 'SubjectName'
_PUBLIC_KEY_ARRAY = 'public_key'
_PUBLIC_KEY_VARIABLE = 'PublicKey'
_CERTIFICATE_ARRAY = 'certificate'
_CERTIFICATE_VARIABLE = 'Certificate'
_CERTIFICATE_SIZE_VARIABLE = 'CertificateSize'
_INT_TYPE = 'size_t'
_CHAR_TYPE = 'unsigned char* const'
_VERBOSE = 'verbose'
_MOZILLA_BUNDLE_CHECK = '## Certificate data from Mozilla as of:'
def main():
"""The main entrypoint."""
parser = OptionParser('usage %prog FILE')
parser.add_option('-v', '--verbose', dest='verbose', action='store_true')
parser.add_option('-f', '--full_cert', dest='full_cert', action='store_true')
options, args = parser.parse_args()
if len(args) < 1:
parser.error('No crt file specified.')
return
root_dir, bundle_type = _SplitCrt(args[0], options)
_GenCFiles(root_dir, options, bundle_type)
_Cleanup(root_dir)
def _SplitCrt(source_file, options):
sub_file_blocks = []
label_name = ''
prev_line = None
root_dir = os.path.dirname(os.path.abspath(source_file)) + '/'
_PrintOutput(root_dir, options)
lines = None
with open(source_file) as f:
lines = f.readlines()
mozilla_bundle = any(l.startswith(_MOZILLA_BUNDLE_CHECK) for l in lines)
for line in lines:
if line.startswith('#'):
if mozilla_bundle:
continue
if line.startswith('# Label: '):
sub_file_blocks.append(line)
label = re.search(r'\".*\"', line)
temp_label = label.group(0)
end = len(temp_label) - 1
label_name = _SafeName(temp_label[1:end])
if mozilla_bundle and line.startswith('==='):
sub_file_blocks.append(line)
label_name = _SafeName(prev_line)
elif line.startswith('-----END CERTIFICATE-----'):
sub_file_blocks.append(line)
new_file_name = root_dir + _PREFIX + label_name + _EXTENSION
_PrintOutput('Generating: ' + new_file_name, options)
new_file = open(new_file_name, 'w')
for out_line in sub_file_blocks:
new_file.write(out_line)
new_file.close()
sub_file_blocks = []
else:
sub_file_blocks.append(line)
prev_line = line
return root_dir, 'Mozilla' if mozilla_bundle else 'Google'
def _GenCFiles(root_dir, options, bundle_type):
output_header_file = open(root_dir + _GENERATED_FILE, 'w')
output_header_file.write(_CreateOutputHeader(bundle_type))
if options.full_cert:
subject_name_list = _CreateArraySectionHeader(_SUBJECT_NAME_VARIABLE,
_CHAR_TYPE, options)
public_key_list = _CreateArraySectionHeader(_PUBLIC_KEY_VARIABLE,
_CHAR_TYPE, options)
certificate_list = _CreateArraySectionHeader(_CERTIFICATE_VARIABLE,
_CHAR_TYPE, options)
certificate_size_list = _CreateArraySectionHeader(_CERTIFICATE_SIZE_VARIABLE,
_INT_TYPE, options)
for _, _, files in os.walk(root_dir):
for current_file in files:
if current_file.startswith(_PREFIX):
prefix_length = len(_PREFIX)
length = len(current_file) - len(_EXTENSION)
label = current_file[prefix_length:length]
filtered_output, cert_size = _CreateCertSection(root_dir, current_file,
label, options)
output_header_file.write(filtered_output + '\n\n\n')
if options.full_cert:
subject_name_list += _AddLabelToArray(label, _SUBJECT_NAME_ARRAY)
public_key_list += _AddLabelToArray(label, _PUBLIC_KEY_ARRAY)
certificate_list += _AddLabelToArray(label, _CERTIFICATE_ARRAY)
certificate_size_list += (' %s,\n') % (cert_size)
if options.full_cert:
subject_name_list += _CreateArraySectionFooter()
output_header_file.write(subject_name_list)
public_key_list += _CreateArraySectionFooter()
output_header_file.write(public_key_list)
certificate_list += _CreateArraySectionFooter()
output_header_file.write(certificate_list)
certificate_size_list += _CreateArraySectionFooter()
output_header_file.write(certificate_size_list)
output_header_file.write(_CreateOutputFooter())
output_header_file.close()
def _Cleanup(root_dir):
for f in os.listdir(root_dir):
if f.startswith(_PREFIX):
os.remove(root_dir + f)
def _CreateCertSection(root_dir, source_file, label, options):
command = 'openssl x509 -in %s%s -noout -C' % (root_dir, source_file)
_PrintOutput(command, options)
output = subprocess.getstatusoutput(command)[1]
decl_block = 'unsigned char .*_(%s|%s|%s)' %\
(_SUBJECT_NAME_ARRAY, _PUBLIC_KEY_ARRAY, _CERTIFICATE_ARRAY)
prog = re.compile(decl_block, re.IGNORECASE)
renamed_output = prog.sub('const unsigned char ' + label + r'_\1', output)
filtered_output = ''
cert_block = '^const unsigned char.*?};$'
prog2 = re.compile(cert_block, re.IGNORECASE | re.MULTILINE | re.DOTALL)
if not options.full_cert:
filtered_output = prog2.sub('', renamed_output, count=2)
else:
filtered_output = renamed_output
cert_size_block = r'\d\d\d+'
prog3 = re.compile(cert_size_block, re.MULTILINE | re.VERBOSE)
result = prog3.findall(renamed_output)
cert_size = result[len(result) - 1]
return filtered_output, cert_size
def _CreateOutputHeader(bundle_type):
output = ('/*\n'
' * Copyright 2004 The WebRTC Project Authors. All rights '
'reserved.\n'
' *\n'
' * Use of this source code is governed by a BSD-style license\n'
' * that can be found in the LICENSE file in the root of the '
'source\n'
' * tree. An additional intellectual property rights grant can be '
'found\n'
' * in the file PATENTS. All contributing project authors may\n'
' * be found in the AUTHORS file in the root of the source tree.\n'
' */\n\n'
'#ifndef RTC_BASE_SSL_ROOTS_H_\n'
'#define RTC_BASE_SSL_ROOTS_H_\n\n'
'// This file is the root certificates in C form.\n\n'
'// It was generated with the following script:\n'
'// tools_webrtc/sslroots/generate_sslroots.py'
' %s_CA_bundle.pem\n\n'
'// clang-format off\n'
'// Don\'t bother formatting generated code,\n'
'// also it would breaks subject/issuer lines.\n\n' % bundle_type)
return output
def _CreateOutputFooter():
return '// clang-format on\n\n#endif // RTC_BASE_SSL_ROOTS_H_\n'
def _CreateArraySectionHeader(type_name, type_type, options):
output = ('const %s kSSLCert%sList[] = {\n') % (type_type, type_name)
_PrintOutput(output, options)
return output
def _AddLabelToArray(label, type_name):
return ' %s_%s,\n' % (label, type_name)
def _CreateArraySectionFooter():
return '};\n\n'
def _SafeName(original_file_name):
bad_chars = ' -./\\()áéíőú\r\n'
replacement_chars = ''
for _ in bad_chars:
replacement_chars += '_'
translation_table = str.maketrans(bad_chars, replacement_chars)
return original_file_name.translate(translation_table)
def _PrintOutput(output, options):
if options.verbose:
print(output)
if __name__ == '__main__':
main()
|
