1Net::SSH::Perl::Cipher:U:sBelrowCfoinsthr(i3b)uted PerlNDeotc:u:mSeSnHt:a:tPieornl::Cipher::Blowfish(3)
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NAME

6       Net::SSH::Perl::Cipher::Blowfish - Wrapper for SSH Blowfish support
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SYNOPSIS

9           use Net::SSH::Perl::Cipher;
10           my $cipher = Net::SSH::Perl::Cipher->new('Blowfish', $key);
11           print $cipher->encrypt($plaintext);
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DESCRIPTION

14       Net::SSH::Perl::Cipher::Blowfish provides Blowfish encryption support
15       for Net::SSH::Perl. To do so it wraps around Crypt::Cipher::Blowfish
16       from the CryptX module.
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18       The blowfish used here is in CBC filter mode with a key length of 32
19       bytes.
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21       SSH1 adds an extra wrinkle with respect to its blowfish algorithm:
22       before and after encryption/decryption, we have to swap the bytes in
23       the string to be encrypted/decrypted. The byte-swapping is done four
24       bytes at a time, and within each of those four-byte blocks we reverse
25       the bytes. So, for example, the string "foobarba" turns into
26       "boofabra". We swap the bytes in this manner in the string before we
27       encrypt/decrypt it, and swap the encrypted/decrypted string again when
28       we get it back.
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30       This byte-swapping is not done when Blowfish is used in the SSH2
31       protocol.
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AUTHOR & COPYRIGHTS

34       Please see the Net::SSH::Perl manpage for author, copyright, and
35       license information.
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39perl v5.32.1                      2021-01-27Net::SSH::Perl::Cipher::Blowfish(3)
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