OpenSSL

openssl enc -aes256 -in plaintext.txt -out ciphertext.txt
openssl enc -aes256 -d -in ciphertext.txt -out plaintext.txt

openssl genrsa -aes256 -out private_key.pem 2048
openssl rsa -in private_key.pem -out public_key.pem -pubout

 openssl dgst -sha256 -sign private_key.pem -out input.sig input.txt
 openssl dgst -sha256 -verify public_key.pem -signature signature_file.sig data_file.txt

echo -n "foobar" | openssl dgst -sha256

Algorithms

• blake2b512

• blake2s256

• md4

• md5

• md5-sha1

• ripemd

• ripemd160

• rmd160

• sha1

• sha224

• sha256

• sha3-224

• sha3-256

• sha3-384

• sha3-512

• sha384

• sha512

• sha512-224

• sha512-256

• shake128

• shake256

• sm3

• ssl3-md5

• ssl3-sha1

• whirlpool

Enc - OpenSSLWiki

This page describes the command line tools for encryption and decryption. Enc is used for various block and stream ciphers using keys based on passwords or explicitly provided. It can also be used for Base64 encoding or decoding.

https://wiki.openssl.org/index.php/Enc

GitHub - openssl/openssl: TLS/SSL and crypto library

TLS/SSL and crypto library. Contribute to openssl/openssl development by creating an account on GitHub.

https://github.com/openssl/openssl/tree/master/