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- package Digest::file;
-
- use strict;
-
- use Exporter ();
- use Carp qw(croak);
- use Digest ();
-
- use vars qw($VERSION @ISA @EXPORT_OK);
-
- $VERSION = "0.01";
- @ISA = qw(Exporter);
- @EXPORT_OK = qw(digest_file_ctx digest_file digest_file_hex digest_file_base64);
-
- sub digest_file_ctx {
- my $file = shift;
- croak("No digest algorithm specified") unless @_;
- local *F;
- open(F, $file) || croak("Can't open '$file': $!");
- binmode(F);
- my $ctx = Digest->new(@_);
- $ctx->addfile(*F);
- close(F);
- return $ctx;
- }
-
- sub digest_file {
- digest_file_ctx(@_)->digest;
- }
-
- sub digest_file_hex {
- digest_file_ctx(@_)->hexdigest;
- }
-
- sub digest_file_base64 {
- digest_file_ctx(@_)->b64digest;
- }
-
- 1;
-
- __END__
-
- =head1 NAME
-
- Digest::file - Calculate digests of files
-
- =head1 SYNOPSIS
-
- # Poor mans "md5sum" command
- use Digest::file qw(digest_file_hex);
- for (@ARGV) {
- print digest_file_hex($_, "MD5"), " $_\n";e
- }
-
- =head1 DESCRIPTION
-
- This module provide 3 convenience functions to calculate the digest
- of files. The following functions are provided:
-
- =over
-
- =item digest_file( $file, $algorithm, [$arg,...] )
-
- This function will calculate and return the binary digest of the bytes
- of the given file. The function will croak if it fails to open or
- read the file.
-
- The $algorithm is a string like "MD2", "MD5", "SHA-1", "SHA-512".
- Additional arguments are passed to the constructor for the
- implementation of the given algorithm.
-
- =item digest_file_hex( $file, $algorithm, [$arg,...] )
-
- Same as digest_file(), but return the digest in hex form.
-
- =item digest_file_base64( $file, $algorithm, [$arg,...] )
-
- Same as digest_file(), but return the digest as a base64 encoded
- string.
-
- =back
-
- =head1 SEE ALSO
-
- L<Digest>
-