Rust Requires Chilkat v11.0.0+

Working with PEM Encrypted Private Keys

See more PEM Examples

Demonstrates how to load and save PEM encrypted private keys. Rust

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

let _ = false;

let pem = chilkat::Pem::new();

let pem_password = "secret".to_string();

// To load a PEM file containing encrypted private keys, simply
// provide the password.
if pem.load_pem_file("/Users/chilkat/testData/pem/pemContainingEncryptedPrivateKeys.pem", &pem_password).is_err() {
    println!("{}", pem.last_error_text());
    return;
}

let fac = chilkat::FileAccess::new();
let pem_text = fac.read_entire_text_file("/Users/chilkat/testData/pem/pemContainingEncryptedPrivateKeys.pem", "utf-8").unwrap_or_default();

// To load a PEM from a string, call LoadPem instead of LoadPemFile:
if pem.load_pem(&pem_text, &pem_password).is_err() {
    println!("{}", pem.last_error_text());
    return;
}

// A few notes:
// The PEM may contain both private keys and certificates (or anything else).
// The password is utilized for whatever content in the PEM is encrypted.  
// It is OK to have both encrypted and non-encrypted content within a given PEM.

// PEM private keys can be encrypted in different formats.  The LoadPem and LoadPemFile
// methods automatically handle the different formats.
// One format is PKCS8 and is indicated by this delimiter within the PEM:

// -----BEGIN ENCRYPTED PRIVATE KEY-----
// MIICoTAbBgkqhkiG9w0BBQMwDgQIfdD0zv24lgkCAggABIICgE0PdHJmRbNs6cBX
// ...

// Another format, we'll call "passphrase" looks like this in the PEM:
// -----BEGIN RSA PRIVATE KEY-----
// Proc-Type: 4,ENCRYPTED
// DEK-Info: DES-EDE3-CBC,A4215544D11C5D0C
// 
// paqy9XRexcSjurHfG0xhCaUD0HrvIdhuC0CbRxxxeMlkLaV6+uT80rBxt2AaibWG
// ...

// Show the bit length of each private key:
let num_private_keys = pem.num_private_keys();
if num_private_keys == 0 {
    println!("{}", ("Error: Expected the PEM to contain private keys."));
    return;
}

let priv_key = chilkat::PrivateKey::new();
for i in 1..=num_private_keys {
    let _ = pem.private_key_at(i - 1, &priv_key);
    println!("{}: {} bits", i, priv_key.bit_length());
}