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(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

Chilkat for Mono

[Reflection.Assembly]::LoadFile("C:\myAssemblies\ChilkatDotNet2.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

 

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