MIME S/MIME Encryption Algorithm Properties

See more MIME Examples

Demonstrates the properties that control S/MIME encryption: Pkcs7CryptAlg (the symmetric content-encryption algorithm), Pkcs7KeyLength (the content-encryption key length in bits), OaepPadding (whether RSAES-OAEP key transport is used instead of RSAES-PKCS1-v1_5), and the OAEP hash settings OaepHash and OaepMgfHash. The properties are configured before calling Encrypt.

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

$success = $false

$mime = New-Object Chilkat.Mime
$success = $mime.SetBodyFromPlainText("This message will be encrypted.")
if ($success -eq $false) {
    $($mime.LastErrorText)
    exit
}

#  Pkcs7CryptAlg is the symmetric content-encryption algorithm.  Supported values are aes, aes-gcm,
#  des, 3des, and rc2.  The default is aes.
$mime.Pkcs7CryptAlg = "aes"

#  Pkcs7KeyLength is the content-encryption key length in bits.  The default is 128.
$mime.Pkcs7KeyLength = 256

#  OaepPadding selects the RSA key-transport padding.  The default is $false (RSAES-PKCS1-v1_5).
#  Set $true to use RSAES-OAEP, in which case the OAEP hash settings apply.
$mime.OaepPadding = $true
$mime.OaepHash = "sha256"
$mime.OaepMgfHash = "sha256"

#  Load the recipient certificate (public key is sufficient for encrypting).
$cert = New-Object Chilkat.Cert
$success = $cert.LoadFromFile("qa_data/recipient.cer")
if ($success -eq $false) {
    $($cert.LastErrorText)
    exit
}

#  Encrypt using the algorithm settings configured above.
$success = $mime.Encrypt($cert)
if ($success -eq $false) {
    $($mime.LastErrorText)
    exit
}

$("Encrypted with " + $mime.Pkcs7CryptAlg + " " + $mime.Pkcs7KeyLength + "-bit key.")