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
|
# Copyright (c) 2018 Intel Corp. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
from collections import namedtuple
import os
import tempfile
import udatetime
from vnfsdk_pkgtools.packager import utils
METADATA_KEYS = [ 'vnf_provider_id',
'vnf_product_name',
'vnf_release_data_time',
'vnf_package_version']
DIGEST_KEYS = [ 'Source', 'Algorithm', 'Hash' ]
SUPPORTED_HASH_ALGO = ['SHA256', 'SHA512']
class ManifestException(Exception):
pass
class Manifest(object):
' Manifest file in CSAR package'
def __init__(self, root_path, manifest_path):
self.path = manifest_path
self.root = root_path
self.metadata = {}
# digest dict
# :key = source
# :value = (algorithm, hash)
self.digests = {}
self.signature = None
self.blocks = [ ]
self._split_blocks()
self._parse_blocks()
@staticmethod
def __split_line(s):
remain=s
try:
(key, value)=s.split(':', 1)
value = value.strip()
remain = None
except ValueError:
key = None
value = None
return (key, value, remain)
def _split_blocks(self):
'''
Split manifest file into blocks, each block is seperated by a empty
line or a line with only spaces and tabs.
'''
block_content = [ ]
with open(os.path.join(self.root, self.path),'rU') as fp:
for line in fp:
line = line.strip(' \t\n')
if line:
block_content.append(line)
else:
if len(block_content):
self.blocks.append(block_content)
block_content = []
if len(block_content):
self.blocks.append(block_content)
def _parse_blocks(self):
for block in self.blocks:
(key, value, remain) = self.__split_line(block.pop(0))
if key == 'metadata':
# metadata block
for line in block:
(key, value, remain) = self.__split_line(line)
if key in METADATA_KEYS:
self.metadata[key] = value
else:
raise ManifestException("Unrecognized metadata %s:" % line)
#validate metadata keys
missing_keys = set(METADATA_KEYS) - set(self.metadata.keys())
if missing_keys:
raise ManifestException("Missing metadata keys: %s" % ','.join(missing_keys))
# validate vnf_release_data_time
try:
udatetime.from_string(self.metadata['vnf_release_data_time'])
except ValueError:
raise ManifestException("Non IETF RFC 3339 vnf_release_data_time: %s"
% self.metadata['vnf_release_data_time'])
elif key in DIGEST_KEYS:
# file digest block
desc = {}
desc[key] = value
for line in block:
(key, value, remain) = self.__split_line(line)
if key in DIGEST_KEYS:
desc[key] = value
else:
raise ManifestException("Unrecognized file digest line %s:" % line)
# validate file digest keys
missing_keys = set(DIGEST_KEYS) - set(desc.keys())
if missing_keys:
raise ManifestException("Missing file digest keys: %s" % ','.join(missing_keys))
# validate file digest algo
desc['Algorithm'] = desc['Algorithm'].upper()
if desc['Algorithm'] not in SUPPORTED_HASH_ALGO:
raise ManifestException("Unsupported hash algorithm: %s" % desc['Algorithm'])
# validate file digest hash
# TODO need to support remote file
if "://" not in desc['Source']:
hash = utils.cal_file_hash(self.root, desc['Source'], desc['Algorithm'])
if hash != desc['Hash']:
raise ManifestException("Mismatched hash for file %s" % desc['Source'])
# nothing is wrong, let's store this
self.digests[desc['Source']] = (desc['Algorithm'], desc['Hash'])
elif key:
raise ManifestException("Unknown key in line '%s:%s'" % (key, value))
else:
# TODO signature block
pass
if not self.metadata:
raise ManifestException("No metadata")
def add_file(self, rel_path, algo='SHA256'):
'''Add file to the manifest and calculate the digest
'''
algo = algo.upper()
if algo not in SUPPORTED_HASH_ALGO:
raise ManifestException("Unsupported hash algorithm: %s" % algo)
hash = utils.cal_file_hash(self.root, rel_path, algo)
self.digests[rel_path] = (algo, hash)
def return_as_string(self):
'''Return the manifest file content as a string
'''
ret = ""
# metadata
ret += "metadata:\n"
ret += "vnf_product_name: %s\n" % (self.metadata['vnf_product_name'])
ret += "vnf_provider_id: %s\n" % (self.metadata['vnf_provider_id'])
ret += "vnf_package_version: %s\n" % (self.metadata['vnf_package_version'])
ret += "vnf_release_data_time: %s\n" % (self.metadata['vnf_release_data_time'])
# degist
for (key, digest) in self.digests.iteritems():
ret += "\n"
ret += "Source: %s\n" % key
ret += "Algorithm: %s\n" % digest[0]
ret += "Hash: %s\n" % digest[1]
return ret
def update_to_file(self, temporary=False):
content = self.return_as_string()
if temporary:
abs_path = tempfile.mktemp()
else:
abs_path = os.path.abspath(os.path.join(self.root, self.path))
with open(abs_path, 'w') as fp:
fp.write(content)
return abs_path
|
