hash_get() - Code Metrics - Inspection of "try hashlib cleanup" - thurask/bbarchivist - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( fc3a5e...a87bbd )

by John

created 2016-12-27 10:40 UTC

hash_get() B

↳ Parent: Project

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	2.0932

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	2
c	1
b	0
f	0
dl	0
loc	25
rs	8.8571
ccs	5
cts	7
cp	0.7143
crap	2.0932

#!/usr/bin/env python3
"""This module is used to generate file hashes/checksums."""

import zlib  # crc32/adler32
import hashlib  # all other hashes
import hmac  # escreens is a hmac, news at 11
import os  # path work
import concurrent.futures  # parallelization
from bbarchivist import bbconstants  # premade stuff
from bbarchivist import exceptions  # exceptions
from bbarchivist import utilities  # cores
from bbarchivist import iniconfig  # config parsing

__author__ = "Thurask"
__license__ = "WTFPL v2"
__copyright__ = "Copyright 2015-2016 Thurask"


def zlib_hash(filepath, method, blocksize=16 * 1024 * 1024):
    """
    Return zlib-based (i.e. CRC32/Adler32) checksum of a file.

    :param filepath: File you wish to verify.
    :type filepath: str

    :param method: "crc32" or "adler32".
    :type method: str

    :param blocksize: How much of file to read at once. Default is 16MB.
    :type blocksize: int
    """
    hashfunc = zlib.crc32 if method == "crc32" else zlib.adler32
    seed = 0 if method == "crc32" else 1
    with open(filepath, 'rb') as file:
        for chunk in iter(lambda: file.read(blocksize), b''):
            seed = hashfunc(chunk, seed)
    final = format(seed & 0xFFFFFFFF, "08x")
    return final


def hashlib_hash(filepath, engine, blocksize=16 * 1024 * 1024):
    """
    Return MD5/SHA-1/SHA-2/SHA-3 hash of a file.

    :param filepath: File you wish to verify.
    :type filepath: str

    :param engine: Hash object to update with file contents.
    :type engine: _hashlib.HASH

    :param blocksize: How much of file to read at once. Default is 16MB.
    :type blocksize: int
    """
    hashfunc_reader(filepath, engine, blocksize)
    return engine.hexdigest()


def hashfunc_reader(filepath, engine, blocksize=16 * 1024 * 1024):
    """
    Generate hash from file contents.

    :param filepath: File you wish to verify.
    :type filepath: str

    :param engine: Hash object to update with file contents.
    :type engine: _hashlib.HASH

    :param blocksize: How much of file to read at once. Default is 16MB.
    :type blocksize: int
    """
    with open(filepath, 'rb') as file:
        while True:
            data = file.read(blocksize)
            if not data:
                break
            engine.update(data)


def ssl_hash(filepath, method, blocksize=16 * 1024 * 1024):
    """
    Return SSL-library dependent hash of a file.

    :param filepath: File you wish to verify.
    :type filepath: str

    :param method: Method to use: algorithms in hashlib that are not guaranteed.
    :type method: str

    :param blocksize: How much of file to read at once. Default is 16MB.
    :type blocksize: int
    """
    try:
        engine = hashlib.new(method)
        hashfunc_reader(filepath, engine, blocksize)
        return engine.hexdigest()
    except ValueError as exc:
        msg = "{0} HASH FAILED".format(method.upper())
        exceptions.handle_exception(exc, msg, None)


def calculate_escreens(pin, app, uptime, duration=30):
    """
    Calculate key for the Engineering Screens based on input.

    :param pin: PIN to check. 8 character hexadecimal, lowercase.
    :type pin: str

    :param app: App version. 10.x.y.zzzz.
    :type app: str

    :param uptime: Uptime in ms.
    :type uptime: str

    :param duration: 1, 3, 6, 15, 30 (days).
    :type duration: str
    """
    #: Somehow, values for lifetimes for escreens.
    lifetimes = {
        1: "",
        3: "Hello my baby, hello my honey, hello my rag time gal",
        7: "He was a boy, and she was a girl, can I make it any more obvious?",
        15: "So am I, still waiting, for this world to stop hating?",
        30: "I love myself today, not like yesterday. I'm cool, I'm calm, I'm gonna be okay"
    }
    #: Escreens magic HMAC secret.
    ehmac = 'Up the time stream without a TARDIS'
    duration = int(duration)
    if duration not in [1, 3, 6, 15, 30]:
        duration = 1
    data = pin.lower() + app + str(uptime) + lifetimes[duration]
    newhmac = hmac.new(ehmac.encode(), data.encode(), digestmod=hashlib.sha1)
    key = newhmac.hexdigest()[:8]
    return key.upper()


def get_hashfunc(hashtype):
    """
    Get genericized hash function from hash type.

    :param hashtype: Hash type.
    :type hashtype: str
    """
    hashfuncs = {"adler32": zlib_hash,
                 "crc32": zlib_hash,
                 "md4": ssl_hash,
                 "sha0": ssl_hash,
                 "ripemd160": ssl_hash,
                 "whirlpool": ssl_hash,
                 "md5": hashlib_hash,
                 "sha1": hashlib_hash,
                 "sha224": hashlib_hash,
                 "sha256": hashlib_hash,
                 "sha384": hashlib_hash,
                 "sha512": hashlib_hash,
                 "sha3224": hashlib_hash,
                 "sha3256": hashlib_hash,
                 "sha3384": hashlib_hash,
                 "sha3512": hashlib_hash}
    return hashfuncs[hashtype]


def get_engine(hashtype):
    """
    Get hashlib engine from hash type.

    :param hashtype: Hash type.
    :type hashtype: str
    """
    hashengines =  {"md5": hashlib.md5(),

                    "sha1": hashlib.sha1(),
                    "sha224": hashlib.sha224(),
                    "sha256": hashlib.sha256(),
                    "sha384": hashlib.sha384(),
                    "sha512": hashlib.sha512()}
    if new_enough(6):

         hashengines.update({"sha3224": hashlib.sha3_224(),

                             "sha3256": hashlib.sha3_256(),

                             "sha3384": hashlib.sha3_384(),

                             "sha3512": hashlib.sha3_512()})

    return hashengines[hashtype]


def hash_get(filename, hashfunc, hashtype, workingdir, blocksize=16777216):
    """
    Generate and pretty format the hash result for a file.

    :param filename: File to hash.
    :type filename: str

    :param hashfunc: Hash function to use.
    :type hashfunc: function

    :param hashtype: Hash type.
    :type hashtype: str

    :param workingdir: Working directory.
    :type workingdir: str

    :param blocksize: Block size. Default is 16MB.
    :type blocksize: int
    """
    if hashfunc == hashlib_hash:
        method = get_engine(hashtype)
    else:
        method = hashtype
    result = hashfunc(os.path.join(workingdir, filename), method, blocksize)
    return "{0} {1}\n".format(result.upper(), os.path.basename(filename))


def base_hash(hashtype, source, workingdir, block, target, kwargs=None):
    """
    Generic hash function; get hash, write to file.

    :param hashtype: Hash type.
    :type hashtype: str

    :param source: File to be hashed; foobar.ext
    :type source: str

    :param workingdir: Path containing files you wish to verify.
    :type workingdir: str

    :param block: Blocksize, in bytes.
    :type block: int

    :param target: File to write to.
    :type target: file

    :param kwargs: Values. Refer to `:func:verifier_config_loader`.
    :type kwargs: dict
    """
    if kwargs[hashtype]:
        hash_generic = [hashtype.upper()]
        hashfunc = get_hashfunc(hashtype)
        hashtype2 = "sha" if hashtype == "sha0" else hashtype
        hash_generic.append(hash_get(source, hashfunc, hashtype2, workingdir, block))
        target.write("\n".join(hash_generic))


def hash_writer(source, dest, workingdir, kwargs=None):
    """
    Write per-file hashes.

    :param source: File to be hashed; foobar.ext
    :type source: str

    :param dest: Destination file; foobar.ext.cksum
    :type dest: str

    :param workingdir: Path containing files you wish to verify.
    :type workingdir: str

    :param kwargs: Values. Refer to `:func:verifier_config_loader`.
    :type kwargs: dict
    """
    block = int(kwargs['blocksize'])
    with open(dest, 'w') as target:
        base_hash("adler32", source, workingdir, block, target, kwargs)
        base_hash("crc32", source, workingdir, block, target, kwargs)
        base_hash("md4", source, workingdir, block, target, kwargs)
        base_hash("md5", source, workingdir, block, target, kwargs)
        base_hash("sha0", source, workingdir, block, target, kwargs)
        base_hash("sha1", source, workingdir, block, target, kwargs)
        base_hash("sha224", source, workingdir, block, target, kwargs)
        base_hash("sha256", source, workingdir, block, target, kwargs)
        base_hash("sha384", source, workingdir, block, target, kwargs)
        base_hash("sha512", source, workingdir, block, target, kwargs)
        base_hash("ripemd160", source, workingdir, block, target, kwargs)
        base_hash("whirlpool", source, workingdir, block, target, kwargs)
        if utilities.new_enough(6):
            base_hash("sha3224", source, workingdir, block, target, kwargs)
            base_hash("sha3256", source, workingdir, block, target, kwargs)
            base_hash("sha3384", source, workingdir, block, target, kwargs)
            base_hash("sha3512", source, workingdir, block, target, kwargs)


def filefilter(file, workingdir, extras=()):
    """
    Check if file in folder is a folder, or if it's got a forbidden extension.

    :param file: File to be hashed.
    :type file: str

    :param workingdir: Path containing files you wish to verify.
    :type workingdir: str

    :param extras: Tuple of extra extensions.
    :type extras: tuple
    """
    return not (os.path.isdir(os.path.join(workingdir, file)) or file.endswith(bbconstants.SUPPS + extras))


def prep_verifier(ldir, selective=False):
    """
    Prepare files for verifier function.

    :param ldir: Path containing files you wish to verify.
    :type ldir: str

    :param selective: Filtering filenames/extensions. Default is false.
    :type selective: bool
    """
    exts = (".txt",) if selective else ()
    fxs = [os.path.join(ldir, afx) for afx in os.listdir(ldir) if filefilter(afx, ldir, exts)]
    return fxs


def verifier(ldir, kwargs=None, selective=False):
    """
    For all files in a directory, perform various hash/checksum functions.
    Take dict to define hashes, write output to a/individual .cksum file(s).

    :param ldir: Path containing files you wish to verify.
    :type ldir: str

    :param kwargs: Values. Refer to `:func:verifier_config_loader`.
    :type kwargs: dict

    :param selective: Filtering filenames/extensions. Default is false.
    :type selective: bool
    """
    kwargs = verifier_config_loader() if kwargs is None else kwargs
    fxs = prep_verifier(ldir, selective)
    with concurrent.futures.ThreadPoolExecutor(max_workers=utilities.workers(fxs)) as xec:
        for file in fxs:
            verifier_individual(xec, ldir, file, kwargs)


def verifier_individual(xec, ldir, file, kwargs):
    """
    Individually verify files through a ThreadPoolExecutor.

    :param xec: ThreadPoolExecutor instance.
    :type xec: concurrent.futures.ThreadPoolExecutor

    :param ldir: Path containing files you wish to verify.
    :type ldir: str

    :param file: Filename.
    :type file: str

    :param kwargs: Values. Refer to `:func:verifier_config_loader`.
    :type kwargs: dict
    """
    print("HASHING:", os.path.basename(file))
    basename = file + ".cksum"
    targetname = os.path.join(ldir, basename)
    try:
        xec.submit(hash_writer, file, targetname, ldir, kwargs)
    except Exception as exc:

        exceptions.handle_exception(exc)


def verifier_config_loader(homepath=None):
    """
    Read a ConfigParser file to get hash preferences.

    :param homepath: Folder containing ini file. Default is user directory.
    :type homepath: str
    """
    ini = iniconfig.generic_loader("hashmodes", homepath)
    results = {}
    results['crc32'] = bool(ini.getboolean('crc32', fallback=False))
    results['adler32'] = bool(ini.getboolean('adler32', fallback=False))
    results['sha0'] = bool(ini.getboolean('sha0', fallback=False))
    results['sha1'] = bool(ini.getboolean('sha1', fallback=True))
    results['sha224'] = bool(ini.getboolean('sha224', fallback=False))
    results['sha256'] = bool(ini.getboolean('sha256', fallback=True))
    results['sha384'] = bool(ini.getboolean('sha384', fallback=False))
    results['sha512'] = bool(ini.getboolean('sha512', fallback=False))
    results['md5'] = bool(ini.getboolean('md5', fallback=True))
    results['md4'] = bool(ini.getboolean('md4', fallback=False))
    results['ripemd160'] = bool(ini.getboolean('ripemd160', fallback=False))
    results['whirlpool'] = bool(ini.getboolean('whirlpool', fallback=False))
    results['blocksize'] = int(ini.getint('blocksize', fallback=16777216))
    results['sha3224'] = bool(ini.getboolean('sha3224', fallback=False))
    results['sha3256'] = bool(ini.getboolean('sha3256', fallback=False))
    results['sha3384'] = bool(ini.getboolean('sha3384', fallback=False))
    results['sha3512'] = bool(ini.getboolean('sha3512', fallback=False))
    return results


def verifier_config_writer(resultdict=None, homepath=None):
    """
    Write a ConfigParser file to store hash preferences.

    :param resultdict: Dictionary of results: {method, bool}
    :type resultdict: dict({str, bool})

    :param homepath: Folder containing ini file. Default is user directory.
    :type homepath: str
    """
    if resultdict is None:
        resultdict = verifier_config_loader()
    results = {method: str(flag).lower() for method, flag in resultdict.items()}
    iniconfig.generic_writer("hashmodes", results, homepath)


1		#!/usr/bin/env python3
2	4	"""This module is used to generate file hashes/checksums."""
3
4	4	import zlib # crc32/adler32
5	4	import hashlib # all other hashes
6	4	import hmac # escreens is a hmac, news at 11
7	4	import os # path work
8	4	import concurrent.futures # parallelization
9	4	from bbarchivist import bbconstants # premade stuff
10	4	from bbarchivist import exceptions # exceptions
11	4	from bbarchivist import utilities # cores
12	4	from bbarchivist import iniconfig # config parsing
13
14	4	__author__ = "Thurask"
15	4	__license__ = "WTFPL v2"
16	4	__copyright__ = "Copyright 2015-2016 Thurask"
17
18
19	4	def zlib_hash(filepath, method, blocksize=16 * 1024 * 1024):
20		"""
21		Return zlib-based (i.e. CRC32/Adler32) checksum of a file.
22
23		:param filepath: File you wish to verify.
24		:type filepath: str
25
26		:param method: "crc32" or "adler32".
27		:type method: str
28
29		:param blocksize: How much of file to read at once. Default is 16MB.
30		:type blocksize: int
31		"""
32	4	hashfunc = zlib.crc32 if method == "crc32" else zlib.adler32
33	4	seed = 0 if method == "crc32" else 1
34	4	with open(filepath, 'rb') as file:
35	4	for chunk in iter(lambda: file.read(blocksize), b''):
36	4	seed = hashfunc(chunk, seed)
37	4	final = format(seed & 0xFFFFFFFF, "08x")
38	4	return final
39
40
41	4	def hashlib_hash(filepath, engine, blocksize=16 * 1024 * 1024):
42		"""
43		Return MD5/SHA-1/SHA-2/SHA-3 hash of a file.
44
45		:param filepath: File you wish to verify.
46		:type filepath: str
47
48		:param engine: Hash object to update with file contents.
49		:type engine: _hashlib.HASH
50
51	4	:param blocksize: How much of file to read at once. Default is 16MB.
52		:type blocksize: int
53		"""
54	4	hashfunc_reader(filepath, engine, blocksize)
55		return engine.hexdigest()
56
57
58		def hashfunc_reader(filepath, engine, blocksize=16 * 1024 * 1024):
59		"""
60		Generate hash from file contents.
61
62		:param filepath: File you wish to verify.
63		:type filepath: str
64	4
65		:param engine: Hash object to update with file contents.
66		:type engine: _hashlib.HASH
67	4
68		:param blocksize: How much of file to read at once. Default is 16MB.
69		:type blocksize: int
70		"""
71		with open(filepath, 'rb') as file:
72		while True:
73		data = file.read(blocksize)
74		if not data:
75		break
76		engine.update(data)
77	4
78	4
79	4	def ssl_hash(filepath, method, blocksize=16 * 1024 * 1024):
80		"""
81		Return SSL-library dependent hash of a file.
82	4
83		:param filepath: File you wish to verify.
84		:type filepath: str
85
86		:param method: Method to use: algorithms in hashlib that are not guaranteed.
87		:type method: str
88
89		:param blocksize: How much of file to read at once. Default is 16MB.
90		:type blocksize: int
91		"""
92	4	try:
93	4	engine = hashlib.new(method)
94	4	hashfunc_reader(filepath, engine, blocksize)
95		return engine.hexdigest()
96		except ValueError as exc:
97	4	msg = "{0} HASH FAILED".format(method.upper())
98		exceptions.handle_exception(exc, msg, None)
99
100
101		def calculate_escreens(pin, app, uptime, duration=30):
102		"""
103		Calculate key for the Engineering Screens based on input.
104
105		:param pin: PIN to check. 8 character hexadecimal, lowercase.
106		:type pin: str
107	4
108	4	:param app: App version. 10.x.y.zzzz.
109	4	:type app: str
110
111		:param uptime: Uptime in ms.
112	4	:type uptime: str
113
114		:param duration: 1, 3, 6, 15, 30 (days).
115		:type duration: str
116		"""
117		#: Somehow, values for lifetimes for escreens.
118		lifetimes = {
119		1: "",
120		3: "Hello my baby, hello my honey, hello my rag time gal",
121		7: "He was a boy, and she was a girl, can I make it any more obvious?",
122	4	15: "So am I, still waiting, for this world to stop hating?",
123	4	30: "I love myself today, not like yesterday. I'm cool, I'm calm, I'm gonna be okay"
124	4	}
125		#: Escreens magic HMAC secret.
126		ehmac = 'Up the time stream without a TARDIS'
127	4	duration = int(duration)
128		if duration not in [1, 3, 6, 15, 30]:
129		duration = 1
130		data = pin.lower() + app + str(uptime) + lifetimes[duration]
131		newhmac = hmac.new(ehmac.encode(), data.encode(), digestmod=hashlib.sha1)
132		key = newhmac.hexdigest()[:8]
133		return key.upper()
134
135
136		def get_hashfunc(hashtype):
137	4	"""
138	4	Get genericized hash function from hash type.
139	4
140		:param hashtype: Hash type.
141		:type hashtype: str
142	4	"""
143		hashfuncs = {"adler32": zlib_hash,
144		"crc32": zlib_hash,
145		"md4": ssl_hash,
146		"sha0": ssl_hash,
147		"ripemd160": ssl_hash,
148		"whirlpool": ssl_hash,
149		"md5": hashlib_hash,
150		"sha1": hashlib_hash,
151		"sha224": hashlib_hash,
152	4	"sha256": hashlib_hash,
153	4	"sha384": hashlib_hash,
154	4	"sha512": hashlib_hash,
155	4	"sha3224": hashlib_hash,
156		"sha3256": hashlib_hash,
157		"sha3384": hashlib_hash,
158		"sha3512": hashlib_hash}
159		return hashfuncs[hashtype]
160
161	4
162		def get_engine(hashtype):
163		"""
164		Get hashlib engine from hash type.
165
166		:param hashtype: Hash type.
167		:type hashtype: str
168		"""
169		hashengines = {"md5": hashlib.md5(),
		0 ignored issues – show Coding Style introduced 2016-12-27 10:46 UTC by Report Bug Copy Issue Report Exactly one space required after assignment hashengines = {"md5": hashlib.md5(), ^ Loading history...
170		"sha1": hashlib.sha1(),
171	4	"sha224": hashlib.sha224(),
172	4	"sha256": hashlib.sha256(),
173	4	"sha384": hashlib.sha384(),
174	4	"sha512": hashlib.sha512()}
175		if new_enough(6):
		0 ignored issues – show Comprehensibility Best Practice introduced 2016-12-27 10:46 UTC by Report Bug Copy Issue Report Undefined variable 'new_enough' Loading history...
176		hashengines.update({"sha3224": hashlib.sha3_224(),
		1 ignored issue – show Coding Style introduced 2016-12-27 10:46 UTC by Report Bug Copy Issue Report The indentation here looks off. 8 spaces were expected, but 9 were found. Loading history... Bug introduced 2016-12-27 10:46 UTC by Report Bug Copy Issue Report The Module `hashlib` does not seem to have a member named `sha3_224`. This check looks for calls to members that are non-existent. These calls will fail. The member could have been renamed or removed. Loading history...
177		"sha3256": hashlib.sha3_256(),
		1 ignored issue – show Bug introduced 2016-12-27 10:46 UTC by Report Bug Copy Issue Report The Module `hashlib` does not seem to have a member named `sha3_256`. This check looks for calls to members that are non-existent. These calls will fail. The member could have been renamed or removed. Loading history...
178		"sha3384": hashlib.sha3_384(),
		1 ignored issue – show Bug introduced 2016-12-27 10:46 UTC by Report Bug Copy Issue Report The Module `hashlib` does not seem to have a member named `sha3_384`. This check looks for calls to members that are non-existent. These calls will fail. The member could have been renamed or removed. Loading history...
179		"sha3512": hashlib.sha3_512()})
		1 ignored issue – show Bug introduced 2016-12-27 10:46 UTC by Report Bug Copy Issue Report The Module `hashlib` does not seem to have a member named `sha3_512`. This check looks for calls to members that are non-existent. These calls will fail. The member could have been renamed or removed. Loading history...
180	4	return hashengines[hashtype]
181
182
183		def hash_get(filename, hashfunc, hashtype, workingdir, blocksize=16777216):
184		"""
185		Generate and pretty format the hash result for a file.
186
187		:param filename: File to hash.
188		:type filename: str
189
190	4	:param hashfunc: Hash function to use.
191	4	:type hashfunc: function
192	4
193	4	:param hashtype: Hash type.
194		:type hashtype: str
195
196		:param workingdir: Working directory.
197		:type workingdir: str
198
199	4	:param blocksize: Block size. Default is 16MB.
200		:type blocksize: int
201		"""
202		if hashfunc == hashlib_hash:
203		method = get_engine(hashtype)
204		else:
205		method = hashtype
206		result = hashfunc(os.path.join(workingdir, filename), method, blocksize)
207		return "{0} {1}\n".format(result.upper(), os.path.basename(filename))
208
209	4
210	4	def base_hash(hashtype, source, workingdir, block, target, kwargs=None):
211	4	"""
212	4	Generic hash function; get hash, write to file.
213
214		:param hashtype: Hash type.
215		:type hashtype: str
216
217		:param source: File to be hashed; foobar.ext
218	4	:type source: str
219
220		:param workingdir: Path containing files you wish to verify.
221		:type workingdir: str
222
223		:param block: Blocksize, in bytes.
224		:type block: int
225
226		:param target: File to write to.
227		:type target: file
228	4
229	4	:param kwargs: Values. Refer to `:func:verifier_config_loader`.
230	4	:type kwargs: dict
231		"""
232		if kwargs[hashtype]:
233	4	hash_generic = [hashtype.upper()]
234		hashfunc = get_hashfunc(hashtype)
235		hashtype2 = "sha" if hashtype == "sha0" else hashtype
236		hash_generic.append(hash_get(source, hashfunc, hashtype2, workingdir, block))
237		target.write("\n".join(hash_generic))
238
239
240		def hash_writer(source, dest, workingdir, kwargs=None):
241		"""
242		Write per-file hashes.
243
244		:param source: File to be hashed; foobar.ext
245		:type source: str
246	4
247	4	:param dest: Destination file; foobar.ext.cksum
248	4	:type dest: str
249	4
250	4	:param workingdir: Path containing files you wish to verify.
251	4	:type workingdir: str
252
253		:param kwargs: Values. Refer to `:func:verifier_config_loader`.
254	4	:type kwargs: dict
255		"""
256		block = int(kwargs['blocksize'])
257		with open(dest, 'w') as target:
258		base_hash("adler32", source, workingdir, block, target, kwargs)
259		base_hash("crc32", source, workingdir, block, target, kwargs)
260		base_hash("md4", source, workingdir, block, target, kwargs)
261		base_hash("md5", source, workingdir, block, target, kwargs)
262		base_hash("sha0", source, workingdir, block, target, kwargs)
263		base_hash("sha1", source, workingdir, block, target, kwargs)
264		base_hash("sha224", source, workingdir, block, target, kwargs)
265		base_hash("sha256", source, workingdir, block, target, kwargs)
266		base_hash("sha384", source, workingdir, block, target, kwargs)
267	4	base_hash("sha512", source, workingdir, block, target, kwargs)
268	4	base_hash("ripemd160", source, workingdir, block, target, kwargs)
269	4	base_hash("whirlpool", source, workingdir, block, target, kwargs)
270	4	if utilities.new_enough(6):
271	4	base_hash("sha3224", source, workingdir, block, target, kwargs)
272	4	base_hash("sha3256", source, workingdir, block, target, kwargs)
273	4	base_hash("sha3384", source, workingdir, block, target, kwargs)
274		base_hash("sha3512", source, workingdir, block, target, kwargs)
275
276	4
277		def filefilter(file, workingdir, extras=()):
278		"""
279		Check if file in folder is a folder, or if it's got a forbidden extension.
280
281		:param file: File to be hashed.
282		:type file: str
283
284		:param workingdir: Path containing files you wish to verify.
285		:type workingdir: str
286	4
287		:param extras: Tuple of extra extensions.
288		:type extras: tuple
289	4	"""
290		return not (os.path.isdir(os.path.join(workingdir, file)) or file.endswith(bbconstants.SUPPS + extras))
291
292
293		def prep_verifier(ldir, selective=False):
294		"""
295		Prepare files for verifier function.
296
297		:param ldir: Path containing files you wish to verify.
298		:type ldir: str
299	4
300		:param selective: Filtering filenames/extensions. Default is false.
301		:type selective: bool
302	4	"""
303		exts = (".txt",) if selective else ()
304		fxs = [os.path.join(ldir, afx) for afx in os.listdir(ldir) if filefilter(afx, ldir, exts)]
305		return fxs
306
307
308		def verifier(ldir, kwargs=None, selective=False):
309		"""
310		For all files in a directory, perform various hash/checksum functions.
311		Take dict to define hashes, write output to a/individual .cksum file(s).
312	4
313		:param ldir: Path containing files you wish to verify.
314		:type ldir: str
315	4
316		:param kwargs: Values. Refer to `:func:verifier_config_loader`.
317		:type kwargs: dict
318
319		:param selective: Filtering filenames/extensions. Default is false.
320		:type selective: bool
321		"""
322		kwargs = verifier_config_loader() if kwargs is None else kwargs
323		fxs = prep_verifier(ldir, selective)
324		with concurrent.futures.ThreadPoolExecutor(max_workers=utilities.workers(fxs)) as xec:
325	4	for file in fxs:
326		verifier_individual(xec, ldir, file, kwargs)
327
328	4
329		def verifier_individual(xec, ldir, file, kwargs):
330		"""
331		Individually verify files through a ThreadPoolExecutor.
332
333		:param xec: ThreadPoolExecutor instance.
334		:type xec: concurrent.futures.ThreadPoolExecutor
335
336		:param ldir: Path containing files you wish to verify.
337		:type ldir: str
338
339		:param file: Filename.
340		:type file: str
341
342		:param kwargs: Values. Refer to `:func:verifier_config_loader`.
343		:type kwargs: dict
344		"""
345	4	print("HASHING:", os.path.basename(file))
346		basename = file + ".cksum"
347		targetname = os.path.join(ldir, basename)
348		try:
349		xec.submit(hash_writer, file, targetname, ldir, kwargs)
350		except Exception as exc:
		1 ignored issue – show Best Practice introduced 2016-11-21 22:25 UTC by Report Bug Copy Issue Report Catching very general exceptions such as `Exception` is usually not recommended. Generally, you would want to handle very specific errors in the exception handler. This ensure that you do not hide other types of errors which should be fixed. So, unless you specifically plan to handle any error, consider adding a more specific exception. Loading history...
351		exceptions.handle_exception(exc)
352
353	4
354	4	def verifier_config_loader(homepath=None):
355	4	"""
356	4	Read a ConfigParser file to get hash preferences.
357	4
358	4	:param homepath: Folder containing ini file. Default is user directory.
359	4	:type homepath: str
360	4	"""
361		ini = iniconfig.generic_loader("hashmodes", homepath)
362		results = {}
363	4	results['crc32'] = bool(ini.getboolean('crc32', fallback=False))
364		results['adler32'] = bool(ini.getboolean('adler32', fallback=False))
365		results['sha0'] = bool(ini.getboolean('sha0', fallback=False))
366		results['sha1'] = bool(ini.getboolean('sha1', fallback=True))
367		results['sha224'] = bool(ini.getboolean('sha224', fallback=False))
368		results['sha256'] = bool(ini.getboolean('sha256', fallback=True))
369		results['sha384'] = bool(ini.getboolean('sha384', fallback=False))
370		results['sha512'] = bool(ini.getboolean('sha512', fallback=False))
371		results['md5'] = bool(ini.getboolean('md5', fallback=True))
372		results['md4'] = bool(ini.getboolean('md4', fallback=False))
373		results['ripemd160'] = bool(ini.getboolean('ripemd160', fallback=False))
374		results['whirlpool'] = bool(ini.getboolean('whirlpool', fallback=False))
375		results['blocksize'] = int(ini.getint('blocksize', fallback=16777216))
376		results['sha3224'] = bool(ini.getboolean('sha3224', fallback=False))
377		results['sha3256'] = bool(ini.getboolean('sha3256', fallback=False))
378		results['sha3384'] = bool(ini.getboolean('sha3384', fallback=False))
379	4	results['sha3512'] = bool(ini.getboolean('sha3512', fallback=False))
380	4	return results
381
382
383	4	def verifier_config_writer(resultdict=None, homepath=None):
384		"""
385		Write a ConfigParser file to store hash preferences.
386
387		:param resultdict: Dictionary of results: {method, bool}
388		:type resultdict: dict({str, bool})
389
390		:param homepath: Folder containing ini file. Default is user directory.
391		:type homepath: str
392		"""
393		if resultdict is None:
394		resultdict = verifier_config_loader()
395		results = {method: str(flag).lower() for method, flag in resultdict.items()}
396		iniconfig.generic_writer("hashmodes", results, homepath)
397

thurask / bbarchivist

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