Rust Requires Chilkat v11.0.0+

Duplicate OpensSSL Command that Decrypts Binary DER

See more OpenSSL Examples

This example duplicates the following:

openssl smime -decrypt -in INPUT_FILE -inform der -binary -out OUTPUT_FILE -recip PEM_CERT_AND_KEY -passin pass:PRIVKEY_PASSWORD

Note: Although "smime" is the OpenSSL command, we're not really dealing with S/MIME. The arguments "-inform der -binary" indicate that the input is simply the binary DER (i.e. the PKCS7 binary encrypted object). The output can be any type of file (whatever was encrypted).

Rust

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

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

crypt.set_crypt_algorithm("pki");

let pem = chilkat::Pem::new();
if pem.load_pem_file("qa_data/pem/myPem.pem", "password").is_err() {
    println!("{}", pem.last_error_text());
    return;
}

let privkey = chilkat::PrivateKey::new();
if pem.private_key_at(0, &privkey).is_err() {
    println!("{}", pem.last_error_text());
    return;
}

let cert = chilkat::Cert::new();
if pem.cert_at(0, &cert).is_err() {
    println!("{}", pem.last_error_text());
    return;
}

if crypt.set_decrypt_cert2(&cert, &privkey).is_err() {
    println!("{}", crypt.last_error_text());
    return;
}

if crypt.ck_decrypt_file("qa_data/infile.enc", "qa_output/outfile.dat").is_err() {
    println!("{}", crypt.last_error_text());
    return;
}

println!("Success.");