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(Node.js) RSA Encrypt and Decrypt Credit Card NumbersNode.js sample code to RSA public-key encrypt and decrypt credit card numbers. The RSA key is loaded from an unencrypted PKCS8 file. Chilkat provides many ways of setting the key -- loading from both encrypted and unencrypted PEM, PKCS8, DER, PVK, etc. Keys may be loaded from files or in-memory representations. (The RSA component also provides the ability to generate RSA keys.) Note: This example requires Chilkat v11.0.0 or greater.
var os = require('os'); if (os.platform() == 'win32') { var chilkat = require('@chilkat/ck-node23-win64'); } else if (os.platform() == 'linux') { if (os.arch() == 'arm') { var chilkat = require('@chilkat/ck-node23-linux-arm'); } else if (os.arch() == 'arm64') { var chilkat = require('@chilkat/ck-node23-linux-arm64'); } else { var chilkat = require('@chilkat/ck-node23-linux-x64'); } } else if (os.platform() == 'darwin') { var chilkat = require('@chilkat/ck-node23-mac-universal'); } function chilkatExample() { var success = false; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. var rsa = new chilkat.Rsa(); var privKey = new chilkat.PrivateKey(); // Load an RSA private key from a file: success = privKey.LoadAnyFormatFile("rsaPrivateKey.key",""); if (success == false) { console.log(privKey.LastErrorText); return; } // Get the public part of the private key. var pubKey = new chilkat.PublicKey(); privKey.ToPublicKey(pubKey); success = rsa.UsePublicKey(pubKey); if (success == false) { console.log(rsa.LastErrorText); return; } // Encrypt a VISA credit card number: // 1234-5678-0000-9999 var ccNumber = "1234567800009999"; var usePrivateKey = false; rsa.EncodingMode = "base64"; var encryptedStr = rsa.EncryptStringENC(ccNumber,usePrivateKey); console.log("Encrypted:"); console.log(encryptedStr); // Now decrypt: var rsaDecryptor = new chilkat.Rsa(); rsaDecryptor.EncodingMode = "base64"; rsaDecryptor.UsePrivateKey(privKey); usePrivateKey = true; var decryptedStr = rsaDecryptor.DecryptStringENC(encryptedStr,usePrivateKey); console.log("Decrypted:"); console.log(decryptedStr); // Important: RSA encryption should only be used to encrypt small amounts of data. // It is typically used for encrypting symmetric encryption // keys such that a symmetric encryption algorithm, such as // AES is then used to encrypt/decrypt bulk data } chilkatExample(); |
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