I'm not aware of one. If you're going to integrate a crypto library into your project, then you can use OpenSSL for AES-GCM. Note that the cipher you're choosing here is only being used to encrypt the private key (and I see no particularly compelling reason for a private key to be encrypted using AES-GCM). We want to generate a 256-bit key and use Cipher Block Chaining (CBC). The basic command to use is openssl enc plus some options: -P — Print out the salt, key and IV used, then exit. Nov 25, 2012  openssl aes-256-cbc -salt -a -d -in encrypted.txt -out plaintext.txt For Asymmetric encryption you must first generate your private key and extract the public key. Openssl genrsa -aes256 -out private.key 8912. OpenSSL uses AES with SHA1. If you wish to examine better-written source than OpenSSL, have a look at the article C class that interfaces to OpenSSL ciphers. The article includes very simple source code that: allows you to encrypt and decrypt files or strings using the OpenSSL AES-256-CBC cipher and SHA1 digest algorithms. Reasons for importing keys include wanting to make a backup of a private key (generated keys are non-exportable, for security reasons), or if the private key is provided by an external source. This document will guide you through using the OpenSSL command line tool to generate a key pair which you can then import into a YubiKey.

• Openssl Generate Aes 256 Key
• Aes 256 Software
• Generate Random Aes Key
• Openssl Generate Aes 256 Key Size

OpenSSL is a powerful cryptography toolkit that can be used for encryption of files and messages.

If you want to use the same password for both encryption of plaintext and decryption of ciphertext, then you have to use a method that is known as symmetric-key algorithm.

Creating a private key with OpenSSL and encrypting it with AES GCM. The AES 128/256 GCM both failed, however AES 128 CBC worked. The command I'm using to generate the key is: $ openssl enc -aes-256-cbc -k secret -P -md sha1 salt=E2EE3D7072F8AAF4 key=C94A324B7221AA8A8760DA0717C80256EF4308EC6068B7144AA3BBA4A5F98007 iv =5C7CB13DBDA69B2C091E0D5E95943627.

From this article you’ll learn how to encrypt and decrypt files and messages with a password from the Linux command line, using OpenSSL.

HowTo: Encrypt a File

Options	Description
openssl	OpenSSL command line tool
enc	Encoding with Ciphers
-aes-256-cbc	The encryption cipher to be used
-salt	Adds strength to the encryption
-in	Specifies the input file
-out	Specifies the output file.

Openssl Generate Aes 256 Key

Interesting fact: 256bit AES is what the United States government uses to encrypt information at the Top Secret level.

Warning: The -salt option should ALWAYS be used if the key is being derived from a password.

Without the -salt option it is possible to perform efficient dictionary attacks on the password and to attack stream cipher encrypted data.

The reason for this is that without the salt the same password always generates the same encryption key.

When the salt is being used the first eight bytes of the encrypted data are reserved for the salt: it is generated at random when encrypting a file and read from the encrypted file when it is decrypted.

HowTo: Decrypt a File

Options	Description
-d	Decrypts data
-in	Specifies the data to decrypt
-out	Specifies the file to put the decrypted data in

Base64 Encode & Decode

Base64 encoding is a standard method for converting 8-bit binary information into a limited subset of ASCII characters.

It is needed for safe transport through e-mail systems, and other systems that are not 8-bit safe.

By default the encrypted file is in a binary format.

If you are going to send it by email, IRC, etc. you have to save encrypted file in Base64-encode.

Cool Tip: Want to keep safe your private data? Create a password protected ZIP file from the Linux command line. Really easy! Read more →

To encrypt file in Base64-encode, you should add -a option:

Option	Description
-a	Tells OpenSSL that the encrypted data is in Base64-ensode

Option -a should also be added while decryption:

Non Interactive Encrypt & Decrypt

Warning: Since the password is visible, this form should only be used where security is not important.

Aes 256 Software

By default a user is prompted to enter the password.

If you are creating a BASH script, you may want to set the password in non interactive way, using -k option.

Generate Random Aes Key

Cool Tip: Need to improve security of the Linux system? Encrypt DNS traffic and get the protection from DNS spoofing! Read more →

Public key cryptography was invented just for such cases.

Encrypt a file using a supplied password:

Openssl Generate Aes 256 Key Size

/generate-hash-key-in-c.html. Decrypt a file using a supplied password: