Python/apps/py-cutils: shasum.py annotate

annotate shasum.py @ 26:ea4bb192c437

FIX: RCS keyword syntax

author	Franz Glasner <fzglas.hg@dom66.de>
date	Mon, 07 Dec 2020 02:47:35 +0100
parents	232063b73e45
children	c29bd96dcd4f

rev	line source
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	1 r"""
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	2 :Author: Franz Glasner
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	3 :Copyright: (c) 2020 Franz Glasner.
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	4 All rights reserved.
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	5 :License: BSD 3-Clause "New" or "Revised" License.
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	6 See :ref:`LICENSE <license>` for details.
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	7 If you cannot find LICENSE see
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	8 <https://opensource.org/licenses/BSD-3-Clause>
26 ea4bb192c437 FIX: RCS keyword syntax Franz Glasner <fzglas.hg@dom66.de> parents: 23 diff changeset	9 :ID: @(#) $HGid$
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	10
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	11 """
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	12
2 5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	13 from __future__ import print_function
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	14
13 db64e282b049 Implement a version option Franz Glasner <fzglas.hg@dom66.de> parents: 12 diff changeset	15
14 409dac636805 +++++ v0.1 Franz Glasner <fzglas.hg@dom66.de> parents: 13 diff changeset	16 __version__ = "0.1"
13 db64e282b049 Implement a version option Franz Glasner <fzglas.hg@dom66.de> parents: 12 diff changeset	17
db64e282b049 Implement a version option Franz Glasner <fzglas.hg@dom66.de> parents: 12 diff changeset	18
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	19 import argparse
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	20 import hashlib
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	21 import io
23 232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	22 try:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	23 import mmap
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	24 except ImportError:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	25 mmap = None
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	26 import os
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	27 import re
23 232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	28 import stat
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	29 import sys
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	30
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	31
2 5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	32 PY2 = sys.version_info[0] < 3
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	33
23 232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	34 CHUNK_SIZE = 1024*1024
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	35 MAP_CHUNK_SIZE = 6410241024
2 5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	36
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	37
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	38 def main(argv=None):
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	39 aparser = argparse.ArgumentParser(
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	40 description="Python implementation of shasum",
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	41 fromfile_prefix_chars='@')
2 5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	42 aparser.add_argument(
7 47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	43 "--algorithm", "-a", action="store", type=argv2algo,
8 048b97213a23 Change the default algorithm to SHA1 to be compatible with Perl's shasum Franz Glasner <fzglas.hg@dom66.de> parents: 7 diff changeset	44 help="1 (default), 224, 256, 384, 512, 3-224, 3-256, 3-384, 3-512, blake2b, blake2s, md5")
7 47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	45 aparser.add_argument(
3 5a6ed622846c Add comman line switches for reading in binary and text mode Franz Glasner <fzglas.hg@dom66.de> parents: 2 diff changeset	46 "--binary", "-b", action="store_false", dest="text_mode", default=False,
5a6ed622846c Add comman line switches for reading in binary and text mode Franz Glasner <fzglas.hg@dom66.de> parents: 2 diff changeset	47 help="read in binary mode (default)")
5a6ed622846c Add comman line switches for reading in binary and text mode Franz Glasner <fzglas.hg@dom66.de> parents: 2 diff changeset	48 aparser.add_argument(
9 81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	49 "--bsd", "-B", action="store_true", dest="bsd", default=False,
17 184ab1da1307 Extend help messages Franz Glasner <fzglas.hg@dom66.de> parents: 14 diff changeset	50 help="Write BSD style output. This is also the default output format of :command:`openssl dgst`.")
9 81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	51 aparser.add_argument(
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	52 "--check", "-c", action="store_true",
17 184ab1da1307 Extend help messages Franz Glasner <fzglas.hg@dom66.de> parents: 14 diff changeset	53 help="""Read digests from FILEs and check them.
184ab1da1307 Extend help messages Franz Glasner <fzglas.hg@dom66.de> parents: 14 diff changeset	54 If this option is specified, the FILE options become checklists. Each
184ab1da1307 Extend help messages Franz Glasner <fzglas.hg@dom66.de> parents: 14 diff changeset	55 checklist should contain hash results in a supported format, which will
184ab1da1307 Extend help messages Franz Glasner <fzglas.hg@dom66.de> parents: 14 diff changeset	56 be verified against the specified paths. Output consists of the digest
184ab1da1307 Extend help messages Franz Glasner <fzglas.hg@dom66.de> parents: 14 diff changeset	57 used, the file name, and an OK, FAILED, or MISSING for the result of
184ab1da1307 Extend help messages Franz Glasner <fzglas.hg@dom66.de> parents: 14 diff changeset	58 the comparison. This will validate any of the supported checksums.
184ab1da1307 Extend help messages Franz Glasner <fzglas.hg@dom66.de> parents: 14 diff changeset	59 If no file is given, stdin is used.""")
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	60 aparser.add_argument(
22 6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	61 "--checklist", "-C", metavar="CHECKLIST",
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	62 help="""Compare the checksum of each FILE against the checksums in
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	63 the CHECKLIST. Any specified FILE that is not listed in the CHECKLIST will
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	64 generate an error.""")
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	65
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	66 aparser.add_argument(
9 81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	67 "--reverse", "-r", action="store_false", dest="bsd", default=False,
81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	68 help="explicitely select normal coreutils style output (to be option compatible with BSD style commands and :command:`openssl dgst -r`)")
81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	69 aparser.add_argument(
81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	70 "--tag", action="store_true", dest="bsd", default=False,
81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	71 help="alias for the `--bsd' option (to be compatible with :command:`b2sum`)")
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	72 aparser.add_argument(
3 5a6ed622846c Add comman line switches for reading in binary and text mode Franz Glasner <fzglas.hg@dom66.de> parents: 2 diff changeset	73 "--text", "-t", action="store_true", dest="text_mode", default=False,
6 a21e83c855cc Help message: drop "yet" for text-mode flag Franz Glasner <fzglas.hg@dom66.de> parents: 5 diff changeset	74 help="read in text mode (not supported)")
3 5a6ed622846c Add comman line switches for reading in binary and text mode Franz Glasner <fzglas.hg@dom66.de> parents: 2 diff changeset	75 aparser.add_argument(
13 db64e282b049 Implement a version option Franz Glasner <fzglas.hg@dom66.de> parents: 12 diff changeset	76 "--version", "-v", action="version", version=__version__)
db64e282b049 Implement a version option Franz Glasner <fzglas.hg@dom66.de> parents: 12 diff changeset	77 aparser.add_argument(
2 5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	78 "files", nargs="*", metavar="FILE")
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	79
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	80 opts = aparser.parse_args(args=argv)
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	81
3 5a6ed622846c Add comman line switches for reading in binary and text mode Franz Glasner <fzglas.hg@dom66.de> parents: 2 diff changeset	82 if opts.text_mode:
5a6ed622846c Add comman line switches for reading in binary and text mode Franz Glasner <fzglas.hg@dom66.de> parents: 2 diff changeset	83 print("ERROR: text mode not supported", file=sys.stderr)
22 6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	84 sys.exit(78) # :manpage:`sysexits(3)` EX_CONFIG
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	85
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	86 if opts.check and opts.checklist:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	87 print("ERROR: only one of --check or --checklist allowed",
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	88 file=sys.stderr)
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	89 sys.exit(64) # :manpage:`sysexits(3)` EX_USAGE
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	90
7 47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	91 if not opts.algorithm:
8 048b97213a23 Change the default algorithm to SHA1 to be compatible with Perl's shasum Franz Glasner <fzglas.hg@dom66.de> parents: 7 diff changeset	92 opts.algorithm = argv2algo("1")
7 47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	93
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	94 if opts.check:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	95 return verify_digests_from_files(opts)
22 6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	96 elif opts.checklist:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	97 return verify_digests_with_checklist(opts)
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	98 else:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	99 return generate_digests(opts)
10 77446cd3ea6f Move the digest generation loop from "main()" into an own function "generate_digests()". Franz Glasner <fzglas.hg@dom66.de> parents: 9 diff changeset	100
77446cd3ea6f Move the digest generation loop from "main()" into an own function "generate_digests()". Franz Glasner <fzglas.hg@dom66.de> parents: 9 diff changeset	101
77446cd3ea6f Move the digest generation loop from "main()" into an own function "generate_digests()". Franz Glasner <fzglas.hg@dom66.de> parents: 9 diff changeset	102 def generate_digests(opts):
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	103 if opts.bsd:
bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	104 out = out_bsd
bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	105 else:
bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	106 out = out_std
20 8f0241ed4a00 Do not append "-" to an empty FILE list any more but check explicitely for an empty list Franz Glasner <fzglas.hg@dom66.de> parents: 19 diff changeset	107 if not opts.files or (len(opts.files) == 1 and opts.files[0] == '-'):
4 67d10529ce88 FIX: "-" filename handling now consistent with Perl shasum Franz Glasner <fzglas.hg@dom66.de> parents: 3 diff changeset	108 if PY2:
67d10529ce88 FIX: "-" filename handling now consistent with Perl shasum Franz Glasner <fzglas.hg@dom66.de> parents: 3 diff changeset	109 if sys.platform == "win32":
11 15c3416d3677 FIX: "msvcrt" is a top-level module on Windows Franz Glasner <fzglas.hg@dom66.de> parents: 10 diff changeset	110 import os, msvcrt # noqa: E401
4 67d10529ce88 FIX: "-" filename handling now consistent with Perl shasum Franz Glasner <fzglas.hg@dom66.de> parents: 3 diff changeset	111 msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY)
67d10529ce88 FIX: "-" filename handling now consistent with Perl shasum Franz Glasner <fzglas.hg@dom66.de> parents: 3 diff changeset	112 source = sys.stdin
2 5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	113 else:
4 67d10529ce88 FIX: "-" filename handling now consistent with Perl shasum Franz Glasner <fzglas.hg@dom66.de> parents: 3 diff changeset	114 source = sys.stdin.buffer
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	115 out(sys.stdout,
23 232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	116 compute_digest_stream(opts.algorithm[0], source),
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	117 None,
7 47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	118 opts.algorithm[1],
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	119 True)
4 67d10529ce88 FIX: "-" filename handling now consistent with Perl shasum Franz Glasner <fzglas.hg@dom66.de> parents: 3 diff changeset	120 else:
67d10529ce88 FIX: "-" filename handling now consistent with Perl shasum Franz Glasner <fzglas.hg@dom66.de> parents: 3 diff changeset	121 for fn in opts.files:
23 232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	122 out(sys.stdout,
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	123 compute_digest_file(opts.algorithm[0], fn),
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	124 fn,
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	125 opts.algorithm[1],
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	126 True)
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	127 return 0
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	128
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	129
22 6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	130 def verify_digests_with_checklist(opts):
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	131 exit_code = 0
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	132 if not opts.files or (len(opts.files) == 1 and opts.files[0] == '-'):
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	133 if PY2:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	134 if sys.platform == "win32":
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	135 import os, msvcrt # noqa: E401
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	136 msvcrt.setmode(sys.stdin.fileno(), os.O_BINARY)
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	137 source = sys.stdin
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	138 else:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	139 source = sys.stdin.buffer
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	140 pl = get_parsed_digest_line_from_checklist(opts.checklist, opts, None)
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	141 if pl is None:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	142 exit_code = 1
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	143 print("-: MISSING")
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	144 else:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	145 tag, algo, cl_filename, cl_digest = pl
23 232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	146 computed_digest = compute_digest_stream(algo, source)
22 6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	147 if cl_digest.lower() == computed_digest.lower():
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	148 res = "OK"
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	149 else:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	150 res = "FAILED"
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	151 exit_code = 1
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	152 print("{}: {}: {}".format(tag, "-", res))
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	153 else:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	154 for fn in opts.files:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	155 pl = get_parsed_digest_line_from_checklist(opts.checklist, opts, fn)
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	156 if pl is None:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	157 print("{}: MISSING".format(fn))
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	158 exit_code = 1
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	159 else:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	160 tag, algo, cl_filename, cl_digest = pl
23 232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	161 computed_digest = compute_digest_file(algo, fn)
22 6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	162 if cl_digest.lower() == computed_digest.lower():
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	163 res = "OK"
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	164 else:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	165 exit_code = 1
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	166 res = "FAILED"
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	167 print("{}: {}: {}".format(tag, fn, res))
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	168 return exit_code
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	169
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	170
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	171 def verify_digests_from_files(opts):
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	172 exit_code = 0
20 8f0241ed4a00 Do not append "-" to an empty FILE list any more but check explicitely for an empty list Franz Glasner <fzglas.hg@dom66.de> parents: 19 diff changeset	173 if not opts.files or (len(opts.files) == 1 and opts.files[0] == '-'):
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	174 for checkline in sys.stdin:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	175 if not checkline:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	176 continue
18 285848db0b52 When verifying/checking digests: also print the digest tag used Franz Glasner <fzglas.hg@dom66.de> parents: 17 diff changeset	177 r, fn, tag = handle_checkline(opts, checkline)
285848db0b52 When verifying/checking digests: also print the digest tag used Franz Glasner <fzglas.hg@dom66.de> parents: 17 diff changeset	178 print("{}: {}: {}".format(tag, fn, r.upper()))
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	179 if r != "ok" and exit_code == 0:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	180 exit_code = 1
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	181 else:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	182 for fn in opts.files:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	183 with io.open(fn, "rt", encoding="utf-8") as checkfile:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	184 for checkline in checkfile:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	185 if not checkline:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	186 continue
18 285848db0b52 When verifying/checking digests: also print the digest tag used Franz Glasner <fzglas.hg@dom66.de> parents: 17 diff changeset	187 r, fn, tag = handle_checkline(opts, checkline)
285848db0b52 When verifying/checking digests: also print the digest tag used Franz Glasner <fzglas.hg@dom66.de> parents: 17 diff changeset	188 print("{}: {}: {}".format(tag, fn, r.upper()))
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	189 if r != "ok" and exit_code == 0:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	190 exit_code = 1
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	191 return exit_code
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	192
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	193
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	194 def handle_checkline(opts, line):
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	195 """
18 285848db0b52 When verifying/checking digests: also print the digest tag used Franz Glasner <fzglas.hg@dom66.de> parents: 17 diff changeset	196 :return: a tuple with static "ok", "missing", or "failed", the filename and
285848db0b52 When verifying/checking digests: also print the digest tag used Franz Glasner <fzglas.hg@dom66.de> parents: 17 diff changeset	197 the digest used
285848db0b52 When verifying/checking digests: also print the digest tag used Franz Glasner <fzglas.hg@dom66.de> parents: 17 diff changeset	198 :rtype: tuple(str, str, str)
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	199
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	200 """
21 f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	201 parts = parse_digest_line(opts, line)
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	202 if not parts:
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	203 raise ValueError(
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	204 "improperly formatted digest line: {}".format(line))
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	205 tag, algo, fn, digest = parts
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	206 try:
23 232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	207 d = compute_digest_file(algo, fn)
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	208 if d.lower() == digest.lower():
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	209 return ("ok", fn, tag)
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	210 else:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	211 return ("failed", fn, tag)
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	212 except EnvironmentError:
18 285848db0b52 When verifying/checking digests: also print the digest tag used Franz Glasner <fzglas.hg@dom66.de> parents: 17 diff changeset	213 return ("missing", fn, tag)
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	214
bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	215
22 6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	216 def get_parsed_digest_line_from_checklist(checklist, opts, filename):
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	217 if filename is None:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	218 filenames = ("-", "stdin", "", )
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	219 else:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	220 filenames = (
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	221 normalize_filename(filename, strip_leading_dot_slash=True),)
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	222 with io.open(checklist, "rt", encoding="utf-8") as clf:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	223 for checkline in clf:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	224 if not checkline:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	225 continue
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	226 parts = parse_digest_line(opts, checkline)
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	227 if not parts:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	228 raise ValueError(
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	229 "improperly formatted digest line: {}".format(checkline))
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	230 fn = normalize_filename(parts[2], strip_leading_dot_slash=True)
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	231 if fn in filenames:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	232 return parts
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	233 else:
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	234 return None
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	235
6bdfc5ad4656 Implemented OpenBSD's -C (aka --checklist) option for shasum Franz Glasner <fzglas.hg@dom66.de> parents: 21 diff changeset	236
21 f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	237 def parse_digest_line(opts, line):
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	238 """Parse a `line` of a digest file and return its parts.
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	239
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	240 :return: a tuple of the normalized algorithm tag, the algorithm
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	241 constructor, the filename and the hex digest;
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	242 if `line` cannot be parsed successfully `None` is returned
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	243 :rtype: tuple(str, obj, str, str) or None
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	244
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	245 Handles coreutils and BSD-style file formats.
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	246
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	247 """
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	248 # determine checkfile format (BSD or coreutils)
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	249 # BSD?
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	250 mo = re.search(r"\A(\S+)\s$(.)$\s=\s(.+)\n?\Z", line)
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	251 if mo:
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	252 # (tag, algorithm, filename, digest)
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	253 return (mo.group(1),
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	254 algotag2algotype(mo.group(1)),
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	255 mo.group(2),
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	256 mo.group(3))
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	257 else:
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	258 # coreutils?
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	259 mo = re.search(r"([^\ ]+) [\*\ ]?(.+)\n?\Z", line)
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	260 if mo:
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	261 # (tag, algorithm, filename, digest)
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	262 return (opts.algorithm[1],
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	263 opts.algorithm[0],
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	264 mo.group(2),
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	265 mo.group(1))
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	266 else:
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	267 return None
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	268
f2d634270e1c Refactor: parse a line of a digest file within a dedicated funcion Franz Glasner <fzglas.hg@dom66.de> parents: 20 diff changeset	269
7 47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	270 def argv2algo(s):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	271 """Convert a commane line algorithm specifier into a tuple with the
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	272 type/factory of the digest and the algorithms tag for output purposes.
7 47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	273
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	274 :param str s: the specifier from the commane line
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	275 :return: the internal digest specification
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	276 :rtype: a tuple (digest_type_or_factory, name_in_output)
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	277
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	278 String comparisons are done case-insensitively.
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	279
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	280 """
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	281 s = s.lower()
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	282 if s in ("1", "sha1"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	283 return (hashlib.sha1, "SHA1")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	284 elif s in ("224", "sha224"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	285 return (hashlib.sha224, "SHA224")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	286 elif s in ("256", "sha256"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	287 return (hashlib.sha256, "SHA256")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	288 elif s in ("384", "sha384"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	289 return (hashlib.sha384, "SHA384")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	290 elif s in ("512", "sha512"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	291 return (hashlib.sha512, "SHA512")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	292 elif s in ("3-224", "sha3-224"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	293 return (hashlib.sha3_224, "SHA3-224")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	294 elif s in ("3-256", "sha3-256"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	295 return (hashlib.sha3_256, "SHA3-256")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	296 elif s in ("3-384", "sha3-384"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	297 return (hashlib.sha3_384, "SHA3-384")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	298 elif s in ("3-512", "sha3-512"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	299 return (hashlib.sha3_512, "SHA3-512")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	300 elif s in ("blake2b", "blake2b-512"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	301 return (hashlib.blake2b, "BLAKE2b")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	302 elif s in ("blake2s", "blake2s-256"):
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	303 return (hashlib.blake2s, "BLAKE2s")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	304 elif s == "md5":
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	305 return (hashlib.md5, "MD5")
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	306 else:
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	307 raise argparse.ArgumentTypeError(
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	308 "`{}' is not a recognized algorithm".format(s))
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	309
47b4c98e4d40 Allow algorithm selection for all algorithms in :mod:`hashlib`. Franz Glasner <fzglas.hg@dom66.de> parents: 6 diff changeset	310
12 5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	311 def algotag2algotype(s):
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	312 """Convert the algorithm specifier in a BSD-style digest file to the
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	313 type/factory of the corresponding algorithm.
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	314
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	315 :param str s: the tag (i.e. normalized name) or the algorithm
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	316 :return: the digest type or factory for `s`
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	317
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	318 All string comparisons are case-sensitive.
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	319
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	320 """
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	321 if s == "SHA1":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	322 return hashlib.sha1
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	323 elif s == "SHA224":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	324 return hashlib.sha224
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	325 elif s == "SHA256":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	326 return hashlib.sha256
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	327 elif s == "SHA384":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	328 return hashlib.sha384
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	329 elif s == "SHA512":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	330 return hashlib.sha512
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	331 elif s == "SHA3-224":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	332 return hashlib.sha3_224
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	333 elif s == "SHA3-256":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	334 return hashlib.sha3_256
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	335 elif s == "SHA3-384":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	336 return hashlib.sha3_384
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	337 elif s == "SHA3-512":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	338 return hashlib.sha3_512
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	339 elif s == "BLAKE2b":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	340 return hashlib.blake2b
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	341 elif s == "BLAKE2s":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	342 return hashlib.blake2s
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	343 elif s == "MD5":
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	344 return hashlib.md5
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	345 else:
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	346 raise ValueError("unknown algorithm: {}".format(s))
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	347
5e2c9123f93f Implemented digest verification: -c or --check option Franz Glasner <fzglas.hg@dom66.de> parents: 11 diff changeset	348
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	349 def out_bsd(dest, digest, filename, digestname, binary):
9 81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	350 """BSD format output, also :command:`openssl dgst` and
81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	351 :command:`b2sum --tag" format output
81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	352
81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	353 """
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	354 if filename is None:
bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	355 print(digest, file=dest)
bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	356 else:
19 2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	357 print("{} ({}) = {}".format(digestname,
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	358 normalize_filename(filename),
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	359 digest),
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	360 file=dest)
bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	361
bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	362
bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	363 def out_std(dest, digest, filename, digestname, binary):
9 81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	364 """Coreutils format (:command:`shasum` et al.)
81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	365
81f28bf89c26 Some more output selection options and documentation Franz Glasner <fzglas.hg@dom66.de> parents: 8 diff changeset	366 """
19 2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	367 print("{} {}{}".format(
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	368 digest,
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	369 '*' if binary else ' ',
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	370 '-' if filename is None else normalize_filename(filename)),
5 bbcb225640de Handle standard and BSD-style output formats Franz Glasner <fzglas.hg@dom66.de> parents: 4 diff changeset	371 file=dest)
2 5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	372
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	373
23 232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	374 def compute_digest_file(hashobj, filename):
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	375 """
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	376 :param hashobj: a :mod:`hashlib` compatible hash algorithm type or factory
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	377 :param str filename: filename within the filesystem
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	378 :return: the digest in hex form
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	379 :rtype: str
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	380
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	381 """
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	382 h = hashobj()
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	383 flags = os.O_RDONLY
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	384 try:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	385 flags \|= os.O_BINARY
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	386 except AttributeError:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	387 pass
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	388 fd = os.open(filename, flags)
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	389 try:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	390 st = os.fstat(fd)
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	391 filesize = st[stat.ST_SIZE]
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	392 #
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	393 # On Windows mmapped file with length 0 are not supported
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	394 # -> use low-level IO
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	395 #
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	396 if mmap is None:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	397 while True:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	398 buf = os.read(fd, CHUNK_SIZE)
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	399 if len(buf) == 0:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	400 break
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	401 h.update(buf)
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	402 else:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	403 # mmap
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	404 if filesize < MAP_CHUNK_SIZE:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	405 mapsize = filesize
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	406 mapoffset = 0
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	407 else:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	408 mapsize = MAP_CHUNK_SIZE
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	409 mapoffset = 0
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	410 rest = filesize
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	411 while rest > 0:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	412 m = mmap.mmap(fd,
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	413 mapsize,
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	414 access=mmap.ACCESS_READ,
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	415 offset=mapoffset)
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	416 try:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	417 h.update(m)
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	418 finally:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	419 m.close()
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	420 rest -= mapsize
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	421 mapoffset += mapsize
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	422 if rest < mapsize:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	423 mapsize = rest
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	424 finally:
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	425 os.close(fd)
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	426 return h.hexdigest()
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	427
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	428
232063b73e45 Optimized reading of files by using mmap. Franz Glasner <fzglas.hg@dom66.de> parents: 22 diff changeset	429 def compute_digest_stream(hashobj, instream):
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	430 """
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	431
2 5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	432 :param hashobj: a :mod:`hashlib` compatible hash algorithm type or factory
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	433 :param instream: a bytes input stream to read the data to be hashed from
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	434 :return: the digest in hex form
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	435 :rtype: str
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	436
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	437 """
2 5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	438 h = hashobj()
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	439 while True:
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	440 buf = instream.read(CHUNK_SIZE)
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	441 if buf is not None:
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	442 if len(buf) == 0:
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	443 break
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	444 h.update(buf)
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	445 return h.hexdigest()
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	446
5510a39a2d04 Basic hashing with proper binary stdin/stdout support for Py2, Py3 and Windows Franz Glasner <fzglas.hg@dom66.de> parents: 1 diff changeset	447
19 2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	448 def normalize_filename(filename, strip_leading_dot_slash=False):
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	449 filename = filename.replace("\\", "/")
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	450 if strip_leading_dot_slash:
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	451 while filename.startswith("./"):
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	452 filename = filename[2:]
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	453 return filename
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	454
2f9e702e3f7a Convert backslashes in filenames to forward slashes when creating digests Franz Glasner <fzglas.hg@dom66.de> parents: 18 diff changeset	455
1 bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	456 if __name__ == "__main__":
bbf4e0f5b651 Begin the shasum.py script Franz Glasner <fzglas.hg@dom66.de> parents: diff changeset	457 sys.exit(main())

Mercurial > hgrepos > Python > apps > py-cutils

annotate shasum.py @ 26:ea4bb192c437