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(Visual FoxPro) 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 ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL lnSuccess
LOCAL loMime
LOCAL loPart0
LOCAL loPart1
LOCAL loSbMime
LOCAL loCert

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

loMime = CreateObject('Chilkat_9_5_0.Mime')

*  Create a MIME message to encrypt.
loMime.NewMultipartMixed()
loMime.AddHeaderField("someHeader1","Some value 1")
loMime.AddHeaderField("someHeader2","Some value 2")

loPart0 = CreateObject('Chilkat_9_5_0.Mime')
loPart0.AddHeaderField("hdrA","Some value A")
loPart0.AddHeaderField("hdrB","Some value B")
loPart0.ContentType = "text/plain"
loPart0.SetBody("This is the plain-text body.")

loPart1 = CreateObject('Chilkat_9_5_0.Mime')
loPart1.AddHeaderField("hdrX","Some value X")
loPart1.AddHeaderField("hdrY","Some value Y")
loPart1.ContentType = "text/xml"
loPart1.SetBody("<a>This is the XML body</a>")

loMime.AppendPart(loPart0)
loMime.AppendPart(loPart1)

*  The MIME to be encrypted:
loSbMime = CreateObject('Chilkat_9_5_0.StringBuilder')
loMime.GetMimeSb(loSbMime)
? loSbMime.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.)
loCert = CreateObject('Chilkat_9_5_0.Cert')
lnSuccess = loCert.LoadFromFile("qa_data/rsaes-oaep/cert.pem")
IF (lnSuccess <> 1) THEN
    ? loCert.LastErrorText
    RELEASE loMime
    RELEASE loPart0
    RELEASE loPart1
    RELEASE loSbMime
    RELEASE loCert
    CANCEL
ENDIF

*  Set the email object properties to indicate the desired encryption.
loMime.Pkcs7CryptAlg = "aes"
*  If AES-256 is desired, set the following property to 256.
loMime.Pkcs7KeyLength = 128
loMime.OaepPadding = 1
*  Other choices for the OAEP hash algorithm are "sha1", "sha384", and "sha512"
loMime.OaepHash = "sha256"

*  Encrypt the MIME (to create S/MIME, which stands for "Secure MIME")
lnSuccess = loMime.Encrypt(loCert)
IF (lnSuccess <> 1) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    RELEASE loPart0
    RELEASE loPart1
    RELEASE loSbMime
    RELEASE loCert
    CANCEL
ENDIF

? "---------------"
? "Encrypted MIME:"
? "---------------"
? loMime.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

RELEASE loMime
RELEASE loPart0
RELEASE loPart1
RELEASE loSbMime
RELEASE loCert


 

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