PowerShell Requires Chilkat v11.0.0+

RSA Encrypt and Decrypt Strings

See more RSA Examples

_LANGUAGE_ sample code to RSA public-key encrypt and decrypt strings using public and private keys. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

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

$rsa = New-Object Chilkat.Rsa

#  This example also generates the public and private
#  keys to be used in the RSA encryption.
#  Normally, you would generate a key pair once,
#  and distribute the public key to your partner.
#  Anything encrypted with the public key can be
#  decrypted with the private key.  The reverse is 
#  also true: anything encrypted using the private
#  key can be decrypted using the public key.

#  Generate a 2048-bit key.  Chilkat RSA supports
#  key sizes ranging from 512 bits to 4096 bits.
$privKey = New-Object Chilkat.PrivateKey
$success = $rsa.GenKey(2048,$privKey)
if ($success -eq $false) {
    $($rsa.LastErrorText)
    exit
}

$pubKey = New-Object Chilkat.PublicKey
$privKey.ToPublicKey($pubKey)

$plainText = "Encrypting and decrypting should be easy!"

#  Start with a new RSA object to demonstrate that all we
#  need are the keys previously exported:
$rsaEncryptor = New-Object Chilkat.Rsa

#  Encrypted output is always binary.  In this case, we want
#  to encode the encrypted bytes in a printable string.
#  Our choices are "hex", "base64", "url", "quoted-printable".
$rsaEncryptor.EncodingMode = "hex"

#  We'll encrypt with the public key and decrypt with the private
#  key.
$success = $rsaEncryptor.UsePublicKey($pubKey)

$usePrivateKey = $false
$encryptedStr = $rsaEncryptor.EncryptStringENC($plainText,$usePrivateKey)
$($encryptedStr)

#  Now decrypt:
$rsaDecryptor = New-Object Chilkat.Rsa

$rsaDecryptor.EncodingMode = "hex"
$success = $rsaDecryptor.UsePrivateKey($privKey)

$usePrivateKey = $true
$decryptedStr = $rsaDecryptor.DecryptStringENC($encryptedStr,$usePrivateKey)

$($decryptedStr)