Node.js

RSAES-OAEP Encrypt String with AES-128 Content Encryption and SHA256

See more Encryption Examples

Encrypts a string using RSAES-OAEP with SHA256 and AES-128 content encryption to produce PKCS7 output (base64 encoded).

Note: This example requires Chilkat v9.5.0.67 or greater.

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    // First build a string to be encrypted
    var sb = new chilkat.StringBuilder();
    var i = 1;
    while (i < 25) {
        sb.AppendInt(i);
        sb.Append(" the quick brown fox jumped over the lazy dog.\r\n");
        i = i+1;
    }

    console.log(sb.GetAsString());

    // The string to be encrypted looks like this:

    // 1 the quick brown fox jumped over the lazy dog.
    // 2 the quick brown fox jumped over the lazy dog.
    // 3 the quick brown fox jumped over the lazy dog.
    // 4 the quick brown fox jumped over the lazy dog.
    // 5 the quick brown fox jumped over the lazy dog.
    // 6 the quick brown fox jumped over the lazy dog.
    // ...

    // Load a digital certificate. 
    // We don't need the private key for encryption.
    // Only the public key is needed (which is included in a certificate).
    var cert = new chilkat.Cert();
    success = cert.LoadFromFile("qa_data/rsaes-oaep/cert.pem");
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

    var crypt = new chilkat.Crypt2();

    // Tell the crypt object to use the certificate.
    crypt.SetEncryptCert(cert);

    // Indicate that we want PKI encryption (i.e. public-key infrastructure)
    // to produce a CMS message (Cryptographic Message Syntax/PKCS7),
    // that is be created with RSAES-OAEP padding, SHA256, and AES-128 for the
    // bulk encryption.
    crypt.CryptAlgorithm = "pki";
    crypt.Pkcs7CryptAlg = "aes";
    crypt.KeyLength = 128;
    crypt.OaepHash = "sha256";
    crypt.OaepPadding = true;

    // Also, don't forget to be specific about the character encoding (byte representation) of the
    // string to be encrypted.
    crypt.Charset = "utf-8";

    // Now indicate that the PKCS7 output is to be returned in the base64 encoding.
    crypt.EncodingMode = "base64";

    var base64Pkcs7 = crypt.EncryptStringENC(sb.GetAsString());
    if (crypt.LastMethodSuccess !== true) {
        console.log(crypt.LastErrorText);
        return;
    }

    // Show the output
    console.log(base64Pkcs7);

    // This base64 can be copy-and-pasted into the form at http://lapo.it/asn1js/
    // to verify that all the chosen algorithms were indeed used.

    console.log("OK.");

}

chilkatExample();