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

See more MIME Examples

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.

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Local $bSuccess = False

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

$oMime = ObjCreate("Chilkat.Mime")

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

$oPart0 = ObjCreate("Chilkat.Mime")
$oPart0.AddHeaderField("hdrA","Some value A")
$oPart0.AddHeaderField("hdrB","Some value B")
$oPart0.ContentType = "text/plain"
$oPart0.SetBody "This is the plain-text body."

$oPart1 = ObjCreate("Chilkat.Mime")
$oPart1.AddHeaderField("hdrX","Some value X")
$oPart1.AddHeaderField("hdrY","Some value Y")
$oPart1.ContentType = "text/xml"
$oPart1.SetBody "<a>This is the XML body</a>"

$oMime.AppendPart($oPart0)
$oMime.AppendPart($oPart1)

;  The MIME to be encrypted:
$oSbMime = ObjCreate("Chilkat.StringBuilder")
$oMime.GetMimeSb($oSbMime)
ConsoleWrite($oSbMime.GetAsString() & @CRLF)

;  	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.)
$oCert = ObjCreate("Chilkat.Cert")
$bSuccess = $oCert.LoadFromFile("qa_data/rsaes-oaep/cert.pem")
If ($bSuccess <> True) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

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

;  Encrypt the MIME (to create S/MIME, which stands for "Secure MIME")
$bSuccess = $oMime.Encrypt($oCert)
If ($bSuccess <> True) Then
    ConsoleWrite($oMime.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("---------------" & @CRLF)
ConsoleWrite("Encrypted MIME:" & @CRLF)
ConsoleWrite("---------------" & @CRLF)
ConsoleWrite($oMime.GetMime() & @CRLF)

ConsoleWrite("Success." & @CRLF)

;  ---------------------------------------------------
;  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