claes(1) - f39

1CLAES(1)                        Cryptlib Tools                        CLAES(1)
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NAME

6       claes  -  conventional  encryption  tool  interoperating  with  gpg and
7       openssl
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SYNOPSIS

10       claes [-debug] [-cms | -openssl [-128]] [OPTION] [FILE | -]
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DESCRIPTION

13       claes encrypts or decrypts data  in  OpenPGP  format,  CMS  format  and
14       OPENSSL  format  using  files or standard input with a passphrase-based
15       AES cipher.  If no FILE or "-" is given, data is read from standard in‐
16       put.   The size of any input data is limited to 150 MByte.  The default
17       mode of operation is encryption with the ciphertext  stored  base64-en‐
18       coded in the OpenPGP format.  To decrypt base64-encoded or binary input
19       data the option "-decrypt" must be used.
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21       All input data is processed AS IS and is treated internally  as  binary
22       data  with  no  changes. For every encryption or decryption a user-pro‐
23       vided passphrase is read from the terminal in which claes  is  run.  So
24       claes always works interactively.  There is deliberately no public-key-
25       cryptography build into claes. If you need those, please use clrsa  and
26       clkeys.
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OPTIONS

30       -help  display this help and exit
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32       -version
33              output version information and exit
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35       -debug
36              print debugging information to stderr
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38       -cms   produce CMS enveloped and encrypted data instead of OpenPGP (de‐
39              fault)
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41       -openssl
42              produce encrypted data using pbkdf2 in openssl format
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44       -128   forces the use of 128 bit AES keys in conjunction with  -openssl
45              (256 bits is the default)
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47       -decrypt
48              decrypts an encrypted message (default is encrypt)
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NOTES

51       Full documentation <https://senderek.ie/cryptlib/tools>
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53       This  program depends on two packages providing the cryptlib shared ob‐
54       ject library and the python3-bindings to this library.
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56       You  can  download  both   packages   in   RPM   or   DEB   format   at
57       https://senderek.ie/cryptlib/downloads
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59       Using FEDORA you can install the packages cryptlib and cryptlib-python3
60       directly from the repository.
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62       In addition the program /bin/systemd-ask-password  is  needed  to  read
63       sensible data from stdin. This program is part of the systemd package.
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INTEROPERABILITY

67       gpg2
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69              Without  any options claes produces OpenPGP (base64-encoded) en‐
70              crypted messages using AES-128.  It  can  decrypt  any  messages
71              (ascii  or binary) produced by GnuPG with the following ciphers:
72              AES, AES192, AES256, 3DES and CAST-128.
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75       openssl
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77              In OpenSSL mode claes writes (base64-encoded) encrypted messages
78              in the proprietary OpenSSL format using AES256 as the default.
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80              These messages can be decrypted with openssl :
81                    openssl aes-256-cbc -pbkdf2 -d -a -in FILE.asc
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83              The  use  of AES-128 can be forced by the additional option -128
84              both for encryption or decryption of OpenSSL messages.
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87       CMS
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89              In CMS mode claes produces PKCS#7 formated (base64-encoded)  en‐
90              veloped and encrypted messages.
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FILES

94       /usr/bin/systemd-ask-password
95              This program is used to provide the passphrase based on a user's
96              input.
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98       /lib64/libcl.so.3.4.6
99              The cryptlib library.
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101       /usr/lib/python3.10/site-packages/cryptlib_py.so
102              Bindings to the cryptlib library used by python3.
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BUGS

105       Please report bugs to innovation@senderek.ie
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AUTHORS

109       claes is written by Ralf Senderek <innovation@senderek.ie>.
110       Cryptlib is written and maintained by Peter Gutmann <pgut001@cs.auckland.ac.nz>
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COPYRIGHT

114       Copyright © 2022 Ralf Senderek. All rights reserved.
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116       License BSD: <https://senderek.ie/cryptlib/bsd.html>.
117       This is free software: you are free  to  change  and  redistribute  it.
118       There is NO WARRANTY, to the extent permitted by law.
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