Rust Requires Chilkat v11.1.0+

openssl enc decrypt

See more Encryption Examples

Demonstrates how to decrypt a file that was encrypted using "openssl enc".

This example shows how to decrypt what was created using this openssl command:

openssl enc -e -aes-256-cbc -in hamlet.xml -out hamlet.enc -pass file:./secret.txt

This example shows how to do this:

openssl enc -d -aes-256-cbc -in hamlet.enc -out hamlet_dec.xml -pass file:./secret.txt

Rust

let mut success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

let crypt = chilkat::Crypt2::new();

// Use aes-256-cbc
crypt.set_crypt_algorithm("aes");
crypt.set_cipher_mode("cbc");
crypt.set_key_length(256);

// We'll need to set the hash algorithm to either MD5 or SHA256.
// openssl version 1.0.* or earlier used MD5 by default
// openssl version 1.1.* uses SHA-256 for the password to secret key derivation.

// For example, if openssl 1.1.0 was used, we should do this:
crypt.set_hash_algorithm("sha256");

// This example assumes openssl 1.0.2 was used to encrypt what we're now decrypting:
crypt.set_hash_algorithm("md5");

// The openssl command we are duplicating is:
// 
//    openssl enc -d -aes-256-cbc -in hamlet.enc -out hamlet_dec.xml -pass file:./secret.txt
// 
// The file secret.txt contains the word "secret".  We could write code to load the contents
// of secret.txt, but instead we'll just do this:
crypt.set_encoded_key("secret", "openssl");

// Load the file to be decrypted.
let file_data = chilkat::BinData::new();
success = file_data.load_file("qa_data/openssl_enc/hamlet.enc").is_ok();

// Decrypt
crypt.set_verbose_logging(true);
success = crypt.decrypt_bd(&file_data).is_ok();
println!("{}", crypt.last_error_text());

// Save the decrypted output.
success = file_data.write_file("c:/temp/qa_output/hamlet_dec.xml").is_ok();

println!("success = {}", success);