(JavaScript) RSAES-OAEP Encrypt String with AES-128 Content Encryption and SHA256
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.
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 CkStringBuilder();
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 CkCert();
success = cert.LoadFromFile("qa_data/rsaes-oaep/cert.pem");
if (success !== true) {
console.log(cert.LastErrorText);
return;
}
var crypt = new CkCrypt2();
// 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.");
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