Rust Requires Chilkat v11.0.0+

Duplicate PHP RSA Encryption

See more RSA Examples

Demonstrates how to duplicate the following PHP function. Rust

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

// Duplicate the following PHP code:
// 
//    public function encryptRSA($plainText,$rsaMOD,$pubKEY){
//         $rsa  = new RSA();
//         $rsa->setEncryptionMode(RSA::ENCRYPTION_PKCS1);
//         $publicKey = [
//             'e' => new BigInteger($pubKEY,16),
//             'n' => new BigInteger($rsaMOD,16)
//         ];
// 		
//         $rsa->loadKey($publicKey);
//         $ciphertext = $rsa->encrypt($plainText);
//         return bin2hex($ciphertext);
//     }
// 
//     $plainText="key=abcdefghijkmnopq&iv=abcdefghijkmnopq&h=12345678&s=12345678"
//     $rsaMOD="F0946D8F05604809E24B8CFFD30349CEA9E5F4D320BFD9E9AA1B088863F02C43E7997D37A3E27B4F8F359F1744DB6B20A437067C0D325A80660D12FF56A57673"
//     $pubKEY="010001"

// We have the RSA modulus in hex
let rsa_mod = "F0946D8F05604809E24B8CFFD30349CEA9E5F4D320BFD9E9AA1B088863F02C43E7997D37A3E27B4F8F359F1744DB6B20A437067C0D325A80660D12FF56A57673".to_string();

// The RSA exponent in hex is "010001", which is 65537 in decimal.  It's typically the exponent that is always used.
let rsa_exp = "010001".to_string();

// Get the RSA modulus and exponent in base64.
let bd_mod = chilkat::BinData::new();
let bd_exp = chilkat::BinData::new();
let _ = bd_mod.append_encoded(&rsa_mod, "hex").is_ok();
let _ = bd_exp.append_encoded(&rsa_exp, "hex").is_ok();

// Build the XML representation of the RSA public key
let xml = chilkat::Xml::new();
xml.set_tag("RSAPublicKey");
xml.update_child_content("Modulus", &bd_mod.get_encoded("base64").unwrap_or_default());
xml.update_child_content("Exponent", &bd_exp.get_encoded("base64").unwrap_or_default());

// Load the RSA public key into a Chilkat public key object.
let pubkey = chilkat::PublicKey::new();
let _ = pubkey.load_from_string(&xml.get_xml().unwrap_or_default()).is_ok();

// Setup the RSA object for encryption and do it..
let rsa = chilkat::Rsa::new();
rsa.set_verbose_logging(true);
let _ = rsa.use_public_key(&pubkey).is_ok();

// Use PKCSv1.5 padding
rsa.set_pkcs_padding(true);

// Encrypt and return the string as hex.
rsa.set_encoding_mode("hex");
let plain_text = "key=abcdefghijkmnopq&iv=abcdefghijkmnopq&h=12345678&s=12345678".to_string();
let Ok(cipher_text) = rsa.encrypt_string_enc(&plain_text, false) else {
    println!("{}", rsa.last_error_text());
    return;
};

// Note: The PKCSv1_5 padding incorporates random bytes.  Therefore, the RSA encryption will produce different results each time -- all of which are valid 
// and decrypt correctly to the same original text.
println!("{}", cipher_text);