openssl: recover key and IV by passphraseUsage of the openssl enc command-line option is described there. Below, I will answer your question, but don't forget to have a look at the last part of my text, where I take a look at what happens under the hood. It is instructive. OpenSSL uses a salted key derivation algorithm. The salt is a piece of random bytes generated when encrypting, stored in the file header; upon decryption, the salt is
{{#tags}}- {{label}}
{{/tags}}