Linux Command Line Encryption

本文介绍如何使用OpenSSL工具通过命令行对文件进行加密和解密操作。提供了具体的命令示例,如使用DES3和AES-256-CBC等不同加密算法的方法。

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From: <twebster_at_daksoft.com>
Date: Fri, 22 Oct 2004 16:30:36 -0600

openssl encryption and decryption,

encrypt
      openssl enc <cipher> -e -in filename.txt -out filename.enc
      openssl enc -aes-256-cfb -e -in filename.txt -out filename.enc

decrypt
      openssl enc <cipher> -d -in filename.enc -out filename.txt
      openssl enc -aes-256-cfb -d -in filename.enc -out filename.txt

later,
tony

full-disclosure-admin_at_lists. netsys.com wrote on 10/22/2004 02:47:48 PM:

> Hi,
>
> What's the syntax to decrypt using this?
>
> Regards,
> Joe
>
>
>
>
>
> ----- Original Message -----
> From: "Mike Tancsa" <mike_at_sentex. net>
> To: "Ali Campbell" <fdisclosure_at_alicampbell. org.uk>;
> <full-disclosure_at_lists. netsys.com>
> Sent: Friday, October 22, 2004 1:46 PM
> Subject: Re: [Full-disclosure] Q: Linux Command Line Encryption
>
>
> At 01:48 PM 22/10/2004, Ali Campbell wrote:
> >I need a Linux utility which I can use to encrypt a single gzipped file
> >via the command line. Obviously something open source would be
preferable.
> >I'm not really interested in setting up a whole suite of stuff with
> >keyfiles and so on, and I don't need a public/private key setup, just
> >something quick and dirty with a single secret key for encryption and
> >decryption which is nevertheless reasonably strong.
>
> Whats wrong with openssl ?
>
> openssl des3 -in test.txt -out test.txt.enc
>
> or
>
> openssl aes-256-cbc -in test.txt -out test.txt.enc
>
> This is only as strong as your passphrase. Using something like GPG has
> other advantages since the private key can be kept in a separate location
> from the encrypted file.
>
>
> ---Mike
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.netsys.com/full-disclosure-charter.html
>
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.netsys.com/full-disclosure-charter.html

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html
Received on Oct 22 2004

### Linux MSEAL Library or Tool Usage and Information The term **MSEAL** does not directly correspond to any widely recognized standard libraries, tools, or frameworks within the context of Linux systems as per existing technical documentation[^1]. However, it is possible that this refers to a specific cryptographic library, security module, or proprietary software used in niche domains such as encryption, authentication, or secure communications. In general terms, cryptographic operations on Linux are often handled by well-established libraries like OpenSSL[^2], GnuTLS[^3], or Libsodium[^4]. These provide robust APIs for implementing encryption algorithms (e.g., AES), hashing functions (e.g., SHA-256), digital signatures, key management, etc. Below is an example using OpenSSL's command-line interface: ```bash # Encrypting data with AES-256-CBC algorithm via OpenSSL openssl enc -aes-256-cbc -salt -in plaintext.txt -out encrypted.dat ``` If your query pertains specifically to custom implementations labeled under "MSEAL," consider reviewing internal project specifications or consulting relevant vendor documentation since public resources may lack explicit details about its functionality. Additionally, ensure compliance with licensing agreements when utilizing third-party components. For integrating advanced cryptography into applications developed on Linux platforms, developers frequently leverage programming languages supported by these mentioned libraries through bindings provided therein—for instance Python’s PyCryptodome package offers high-level abstractions over low level cipher primitives found natively inside C/C++ based counterparts listed earlier above too!
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