(JavaScript) Generate RSA Key and Export to PKCS1 / PKCS8

JavaScript example code showing how to generate an RSA public/private key and save to PKCS1 and PKCS8 format files. In a PKCS1 or PKCS8 formatted file, the key is stored in binary ASN.1 format (and ASN.1 is itself written according to DER -- Distinguished Encoding Rules). A PEM file simply contains the binary ASN.1 base64 encoded and delimited by BEGIN/END lines. PKCS1 format files are never encrypted. PKCS8 can be encrypted or unencrypted. Public keys are never encrypted (there is no need). Private keys *should* always be encrypted - unless perhaps the unencrypted private key is obtained and itself stored in some sort of secure place.

Note: This example requires Chilkat v11.0.0 or greater.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

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

var rsa = new CkRsa();

// Generate a 2048-bit key.  Chilkat RSA supports
// key sizes ranging from 512 bits to 8192 bits.
var privKey = new CkPrivateKey();
success = rsa.GenKey(2048,privKey);
if (success == false) {
    console.log(rsa.LastErrorText);
    return;
}

// Get the public key
var pubKey = new CkPublicKey();
privKey.ToPublicKey(pubKey);

// Get the public key as a PKCS8 PEM string
var pubKeyPem = pubKey.GetPem(false);
console.log(pubKeyPem);

// Get the public key in PKCS8 format, in a Base64 encoded string.
var pubKeyPkcs8Base64 = pubKey.GetEncoded(false,"base64");
console.log(pubKeyPkcs8Base64);

// Get the public key in PKCS1 format, in a Base64 encoded string.
var pubKeyPkcs1Base64 = pubKey.GetEncoded(true,"base64");
console.log(pubKeyPkcs1Base64);

// Get the private key in a PKCS8 PEM string.
var privKeyPem = privKey.GetPkcs8Pem();
console.log(privKeyPem);

// Get the private key in a PKCS8 encrypted PEM string.
var privKeyEncPem = privKey.GetPkcs8EncryptedPem("myPassword");
console.log(privKeyEncPem);

// Get the private key in PKCS1 Base64 format
var privKeyPkcs1Base64 = privKey.GetPkcs1ENC("base64");
console.log(privKeyPkcs1Base64);

// Get the private key in PKCS8 Base64 format
var privKeyPkcs8Base64 = privKey.GetPkcs8ENC("base64");
console.log(privKeyPkcs8Base64);

// Save to PKCS1 / PKCS8 / PEM files...

// Save the public key to PKCS8 binary DER
success = pubKey.SaveDerFile(false,"pubKey_pkcs8.der");

// Save the public key to PKCS1 binary DER
success = pubKey.SaveDerFile("pubKey_pkcs1.der");

// Save the private key to unencrypted binary PKCS1 DER.
// Note: PKCS1 is never found in an encrypted format. 
success = privKey.SavePkcs1File("privKey_pkcs1.der");

// Save the private key to unencrypted binary PKCS8
success = privKey.SavePkcs8File("privKey_pkcs8.der");

// Save the private key to encrypted binary PKCS8
success = privKey.SavePkcs8EncryptedFile("myPassword","privKey_enc_pkcs8.der");

// Save the private key to unencrypted PKCS8 PEM
success = privKey.SavePkcs8PemFile("privKey.pem");

// Save the private key to encrypted PKCS8 PEM
success = privKey.SavePkcs8EncryptedPemFile("myPassword","privKey_enc.pem");