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Full Discussion: [Python] replicating "sha256 -C checksum_file.txt file.txt"
Top Forums Programming [Python] replicating "sha256 -C checksum_file.txt file.txt" Post 303038559 by da1 on Friday 6th of September 2019 05:02:07 AM
Old 09-06-2019
This is what I came up with so far, thank you for the hints:
Code:
workdir='/tmp'
iso_name='install65.iso'
sha_file='SHA256'

    file = open(workdir + '/' + sha_file, 'r')
    for lines in file:
        values = [x.strip('()') for x in lines.split()]
        #print(values)
        if iso_name == values[1]:
            print('file found')
            if computed_sum == values[-1]:
                print('hash OK')
                print(values[-1])
            else:
                print('hash NOT OK')
                print(values[-1])
                exit(1)
        else:
            print('file NOT found')
    file.close()


But I'm having a hard time understanding how I can search for one string (ex. iso name) and if found, use the same line and check for another string (hash sum).

The result of the code above is this;
Code:
38d1f8cadd502f1c27bf05c5abde6cc505dd28f3f34f8a941048ff9a54f9f608
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file found
hash OK
38d1f8cadd502f1c27bf05c5abde6cc505dd28f3f34f8a941048ff9a54f9f608
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found
file NOT found

--- Post updated at 12:02 PM ---

I spoke too soon.

I came up with this:
Code:
def check_sha256(block_size=65536):
#    fetch_sha256()
    sha256 = hashlib.sha256()
    with open(workdir + "/" + iso_name, 'rb') as f:
      for block in iter(lambda: f.read(block_size), b''):
        sha256.update(block)
    computed_sum = sha256.hexdigest()
    file = open(workdir + '/' + sha_file, 'r')
    for lines in file:
        values = [x.strip('()') for x in lines.split()]
        if iso_name in values[1]:
            if computed_sum in values[-1]:
                print('SHA256: OK')
                break
            else:
                print('SHA256: NOT OK. Exiting... ')
                exit(1)
    file.close()

It works fine from what I can see but any pointers on improvements would be welcomed!

Thank you very much!
 

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LEARN ABOUT DEBIAN

perl::critic::statistics

Perl::Critic::Statistics(3pm)				User Contributed Perl Documentation			     Perl::Critic::Statistics(3pm)

NAME

       Perl::Critic::Statistics - Compile stats on Perl::Critic violations.

DESCRIPTION

       This class accumulates statistics on Perl::Critic violations across one or more files.  NOTE: This class is experimental and subject to
       change.

INTERFACE SUPPORT

       This is considered to be a non-public class.  Its interface is subject to change without notice.

METHODS

       "new()"
	   Create a new instance of Perl::Critic::Statistics.  No arguments are supported at this time.

       " accumulate( $doc, @violations ) "
	   Accumulates statistics about the $doc and the @violations that were found.

       "modules()"
	   The number of chunks of code (usually files) that have been analyzed.

       "subs()"
	   The total number of subroutines analyzed by this Critic.

       "statements()"
	   The total number of statements analyzed by this Critic.

       "lines()"
	   The total number of lines of code analyzed by this Critic.

       "lines_of_blank()"
	   The total number of blank lines analyzed by this Critic. This includes only blank lines in code, not POD or data.

       "lines_of_comment()"
	   The total number of comment lines analyzed by this Critic. This includes only lines whose first non-whitespace character is "#".

       "lines_of_data()"
	   The total number of lines of data section analyzed by this Critic, not counting the "__END__" or "__DATA__" line. POD in a data section
	   is counted as POD, not data.

       "lines_of_perl()"
	   The total number of lines of Perl code analyzed by this Critic. Perl appearing in the data section is not counted.

       "lines_of_pod()"
	   The total number of lines of POD analyzed by this Critic. Pod occurring in a data section is counted as POD, not as data.

       "violations_by_severity()"
	   The number of violations of each severity found by this Critic as a reference to a hash keyed by severity.

       "violations_by_policy()"
	   The number of violations of each policy found by this Critic as a reference to a hash keyed by full policy name.

       "total_violations()"
	   The the total number of violations found by this Critic.

       "statements_other_than_subs()"
	   The total number of statements minus the number of subroutines.  Useful because a subroutine is considered a statement by PPI.

       "average_sub_mccabe()"
	   The average McCabe score of all scanned subroutines.

       "violations_per_file()"
	   The total violations divided by the number of modules.

       "violations_per_statement()"
	   The total violations divided by the number statements minus subroutines.

       "violations_per_line_of_code()"
	   The total violations divided by the lines of code.

AUTHOR

       Elliot Shank "<perl@galumph.com>"

COPYRIGHT

       Copyright (c) 2007-2011 Elliot Shank.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The full text of this license
       can be found in the LICENSE file included with this module.

perl v5.14.2							    2012-06-07					     Perl::Critic::Statistics(3pm)
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