With the commands shown in this tutorial, you can easily encrypt and decrypt files to secure their contents. In this tutorial, you learned how to encrypt and decrypt files using OpenSSL on the command line. OpenSSL is a powerful tool for implementing encryption and decryption for various purposes. Private key: It is used to decrypt the data. Public key encryption is a type of encryption that uses two keys: Public key: It is used to encrypt the data. camellia-192-ofb -camellia-256-cbc -camellia-256-cfb OpenSSL is a free and open-source cryptography toolkit that can be used to encrypt and decrypt files as well as manage SSL certificates. blowfish -camellia-128-cbc -camellia-128-cfb Based on your operating system you’ll need to download the installer specifically for your. aes-128-cbc -aes-128-cbc-hmac-sha1 -aes-128-ccm 1.In order to run OpenSSL we need to download and install it first. salt Use a salt in the key derivation routines (default ) -v Verbose pbkdf2 Use the pbkdf2 key derivation function -S salt Salt to use, specified as a hexadecimal string (no encryption or decryption is performed ) -p Print out the salt, key and IV used out file Output file to write to (default stdout ) -P Print out the salt, key and IV used, then exit none Use NULL cipher (no encryption or decryption ) -nopad Disable standard block padding md digest Digest to use to create a key from the passphrase OpenSSL can be used to encrypt actual files as well as the communication. K key Key to use, specified as a hexadecimal string The OpenSSL program provides an open source implementation of the SSL protocol. iv IV IV to use, specified as a hexadecimal string e Encrypt the input data (default ) -in file Input file to read from (default stdin ) -iter iterations Specify iteration count and force use of PBKDF2 This will generate a private key with the name private.key and a public key with the name : enc -ciphername -A Process base64 data on one line (requires -a ) -a Perform base64 encoding/decoding (alias -base64 ) -bufsize size Specify the buffer size to use for I/O Openssl rsa -in private.key -pubout -out public.key Here is an example of how you can generate a public and private key pair: To encrypt a file with a public key, first generate a public and private key pair using the genrsa command in OpenSSL. To encrypt a file with a public key using OpenSSL, the rsautl command can be used, which can be used to encrypt and decrypt files using RSA encryption.
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