Go

Duplicate PHP RSA Encryption

See more RSA Examples

Demonstrates how to duplicate the following PHP function. Go

    success := false

    // 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
    rsaMOD := "F0946D8F05604809E24B8CFFD30349CEA9E5F4D320BFD9E9AA1B088863F02C43E7997D37A3E27B4F8F359F1744DB6B20A437067C0D325A80660D12FF56A57673"

    // The RSA exponent in hex is "010001", which is 65537 in decimal.  It's typically the exponent that is always used.
    rsaEXP := "010001"

    // Get the RSA modulus and exponent in base64.
    bdMod := chilkat.NewBinData()
    bdExp := chilkat.NewBinData()
    success = bdMod.AppendEncoded(rsaMOD,"hex")
    success = bdExp.AppendEncoded(rsaEXP,"hex")

    // Build the XML representation of the RSA public key
    xml := chilkat.NewXml()
    xml.SetTag("RSAPublicKey")
    xml.UpdateChildContent("Modulus",*bdMod.GetEncoded("base64"))
    xml.UpdateChildContent("Exponent",*bdExp.GetEncoded("base64"))

    // Load the RSA public key into a Chilkat public key object.
    pubkey := chilkat.NewPublicKey()
    success = pubkey.LoadFromString(*xml.GetXml())

    // Setup the RSA object for encryption and do it..
    rsa := chilkat.NewRsa()
    rsa.SetVerboseLogging(true)
    success = rsa.UsePublicKey(pubkey)

    // Use PKCSv1.5 padding
    rsa.SetPkcsPadding(true)

    // Encrypt and return the string as hex.
    rsa.SetEncodingMode("hex")
    plainText := "key=abcdefghijkmnopq&iv=abcdefghijkmnopq&h=12345678&s=12345678"
    cipherText := rsa.EncryptStringENC(plainText,false)
    if rsa.LastMethodSuccess() == false {
        fmt.Println(rsa.LastErrorText())
        bdMod.DisposeBinData()
        bdExp.DisposeBinData()
        xml.DisposeXml()
        pubkey.DisposePublicKey()
        rsa.DisposeRsa()
        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.
    fmt.Println(*cipherText)

    bdMod.DisposeBinData()
    bdExp.DisposeBinData()
    xml.DisposeXml()
    pubkey.DisposePublicKey()
    rsa.DisposeRsa()