(PowerShell) Encrypt MIME using RSAES-OAEP with SHA256 and AES-128 content encryption

Demonstrates how to encrypt MIME using RSAES-OAEP with SHA256 and AES-128 content encryption.

Note: This example requires Chilkat v9.5.0.67 or greater.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

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

$mime = New-Object Chilkat.Mime

# Create a MIME message to encrypt.
$mime.NewMultipartMixed()
$mime.AddHeaderField("someHeader1","Some value 1")
$mime.AddHeaderField("someHeader2","Some value 2")

$part0 = New-Object Chilkat.Mime
$part0.AddHeaderField("hdrA","Some value A")
$part0.AddHeaderField("hdrB","Some value B")
$part0.ContentType = "text/plain"
$part0.SetBody("This is the plain-text body.")

$part1 = New-Object Chilkat.Mime
$part1.AddHeaderField("hdrX","Some value X")
$part1.AddHeaderField("hdrY","Some value Y")
$part1.ContentType = "text/xml"
$part1.SetBody("<a>This is the XML body</a>")

$mime.AppendPart($part0)
$mime.AppendPart($part1)

# The MIME to be encrypted:
$sbMime = New-Object Chilkat.StringBuilder
$mime.GetMimeSb($sbMime)
$($sbMime.GetAsString())

# 	Content-Type: multipart/mixed; boundary="------------080303020600020604010008"
# 	someHeader1: Some value 1
# 	someHeader2: Some value 2
# 
# 	--------------080303020600020604010008
# 	hdrA: Some value A
# 	hdrB: Some value B
# 	Content-Type: text/plain
# 
# 	This is the plain-text body.
# 	--------------080303020600020604010008
# 	hdrX: Some value X
# 	hdrY: Some value Y
# 	Content-Type: text/xml
# 
# 	<a>This is the XML body</a>
# 	--------------080303020600020604010008--
# 

# Load an RSA-based certificate.
# (Encrypting MIME only requires the public key.  Decrypting MIME requires the private key.)
$cert = New-Object Chilkat.Cert
$success = $cert.LoadFromFile("qa_data/rsaes-oaep/cert.pem")
if ($success -ne $true) {
    $($cert.LastErrorText)
    exit
}

# Set the email object properties to indicate the desired encryption.
$mime.Pkcs7CryptAlg = "aes"
# If AES-256 is desired, set the following property to 256.
$mime.Pkcs7KeyLength = 128
$mime.OaepPadding = $true
# Other choices for the OAEP hash algorithm are "sha1", "sha384", and "sha512"
$mime.OaepHash = "sha256"

# Encrypt the MIME (to create S/MIME, which stands for "Secure MIME")
$success = $mime.Encrypt($cert)
if ($success -ne $true) {
    $($mime.LastErrorText)
    exit
}

$("---------------")
$("Encrypted MIME:")
$("---------------")
$($mime.GetMime())

$("Success.")

# ---------------------------------------------------
# This is sample output for RSAES-OAEP encrypted MIME:
# ---------------------------------------------------

# Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="enveloped-data"
# someHeader1: Some value 1
# someHeader2: Some value 2
# Content-Disposition: attachment; filename="smime.p7m"
# Content-Transfer-Encoding: base64
# 
# MIIDvAYJKoZIhvcNAQcDoIIDrTCCA6kCAQAxggGgMIIBnAIBADB1MGgxCzAJBgNVBAYTAlVTMQsw
# CQYDVQQIDAJJTDEQMA4GA1UEBwwHV2hlYXRvbjEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQ
# dHkgTHRkMRcwFQYDVQQDDA5DaGlsa2F0V2lkZ2V0cwIJAMRwugDmvniwMBwGCSqGSIb3DQEBBzAP
# oA0wCwYJYIZIAWUDBAIBBIIBAFaUL1ga1bOrdqYKcMm+FHUacBvzfBxk0fnPA0AMBdN8BvTWT3CN
# YuqBhjOGyq0FpYD9pVZybUuFMCVsVyIW2O62HnsOK58YaPEUUcdH2sI+yjqX9UAn0P0nVDSsVdeK
# W8x9kMfZg+3UP+y1q+lu7VRJO3f2C9oLQpTkc4VW4n7UOcUI0waykLCjCTL8lFDb7/J3GeuMKyhH
# 5riNz50kpbzqn7m2Ks9yA+QmcTdXclclGFr2vwEUFzSdT2pxh/vaUrogCxkYWbQ2eV7vZg6O4kV0
# aqHBqySkPTAzHKiHH8K8GVdlTuJ8350CpICa4T8w7/Ht5I7dyOPPKy4C+rVtrvcwggH+BgkqhkiG
# 9w0BBwEwHQYJYIZIAWUDBAECBBDTC2WNBN+z2I47/4Feu9YqgIIB0MZvl3nC/q/Wzil6HtfQTr12
# Q5moHY+ORzAa1P9XvX2ZUFhW530mV395mQw/A4o4ekmX9eRPEZquYzZPLT8hNeZIuNdhpcSQUmad
# rKnKkR0wKJ3jJ3LhOIohVBQSYs8kVDZKq6lJBIznlsurFelZoNEhyRschhteDZx5rb7fCe8c2+/O
# DHxaqaHCAzm/Bd7kcg6FFfuTZy3tu0PgP5IsXN4OFA3kkvwjAs4XsVS8jdIcmDNBkYieE8WmJOIm
# Mz7mh/CHWLgWfGKa0Dkb9RcbFgLwYNT3GzuXFw9XPbKkEZjEAtJajWbN6P0WQl96YYd9qZxUpGxZ
# zjTHEYzViUdUXolfpLufttrRXyxN1RFWhNFMFbv66xYqklMSgpdM/Mbk+EuvX6eXayDPvDBpfYMw
# NoRAzv1Ony2c0ez9rBemJICicxAzpuvHbRxdjYs63Dnv+TYgpBK12AxWWpPIjXvw0WQKgTC3Tg8s
# EnuGhpENqso/clJBEBSn4+2WhYtYbdI5sVme67lvqQl1Xxy3r18SWaQbyDOwgYi1E+54lMDOxMy0
# y0FPHk5pP45DnXWj+XORPp5LhuZr5mf62YOXSSUwR5P0cXy4Rc+pN5lhRQPCf5z2