Visual FoxPro

PKCS7 Encrypt using Multiple Certificates

See more MIME Examples

Encrypts MIME using multiple digital certificates. Calls AddEncryptCert once per certificate, followed by a call to EncryptN. The MIME may be decrypted by any owner of one of the certificates + its associated private key. Visual FoxPro

LOCAL lnSuccess
LOCAL loMime
LOCAL loCert1
LOCAL loCert2

lnSuccess = 0

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

loMime = CreateObject('Chilkat.Mime')

*  Build a simple MIME message to be encrypted:
lnSuccess = loMime.AddHeaderField("Content-Type","text/plain")
lnSuccess = loMime.AddHeaderField("abc","123")
loMime.SetBody("This is a test")

*  A digital certificate is required to create PKCS7 encrypted MIME.
*  It can come from a variety of sources: .cer file, .pfx file, PEM files,
*  an in-memory representation, or directly from a Windows
*  registry-based certificate store.

*  Load one cert from a .cer file:
loCert1 = CreateObject('Chilkat.Cert')
lnSuccess = loCert1.LoadFromFile("myCert.cer")
IF (lnSuccess = 0) THEN
    ? loCert1.LastErrorText
    RELEASE loMime
    RELEASE loCert1
    CANCEL
ENDIF

*  Load another cert ...
loCert2 = CreateObject('Chilkat.Cert')
lnSuccess = loCert2.LoadFromFile("anotherCert.cer")
IF (lnSuccess = 0) THEN
    ? loCert2.LastErrorText
    RELEASE loMime
    RELEASE loCert1
    RELEASE loCert2
    CANCEL
ENDIF

*  Tell the MIME object to use these certs for encrypting:
*  (AddEncryptCert shouldn't fail if we already know it contains
*  a valid certificate..)
lnSuccess = loMime.AddEncryptCert(loCert1)
lnSuccess = loMime.AddEncryptCert(loCert2)

*  Encrypt the MIME:
lnSuccess = loMime.EncryptN()
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    RELEASE loCert1
    RELEASE loCert2
    CANCEL
ENDIF

*  Display the MIME:
? loMime.GetMime()

*  The resulting S/MIME looks something like this:

*  abc: 123
*  Content-Disposition: attachment; filename="smime.p7m";
*  Content-Transfer-Encoding: base64
*  Content-Type: application/x-pkcs7-mime;
*   name="smime.p7m";
*  
*  MIID4QYJKoZIhvcNAQcDoIID0jCCA84CAQAxggNlMIIBgQIBADBpMFUxCzAJBgNVBAYTAlpBMSUw
*  IwYDVQQKExxUaGF3dGUgQ29uc3VsdGluZyAoUHR5KSBMdGQuMR8wHQYDVQQDExZUaGF3dGUgQ29k
*  ZSBTaWduaW5nIENBAhB4ouTcAmLszrGi170k1deSMA0GCSqGSIb3DQEBAQUABIIBAKnOPgmISrNH
*  Hd+zESvH5dl5TvBLCxLuIuH6cuZdowHzCqAUzaYFdn1rp88Vvu2x3s6WOvzje/+dE1x0YjEpeqxd
*  ufehlb6Jl9ucxSMWARWMxWGxu0eZGJVt+SBBrVddqdtrIU9lVt5rBxkU67P8PxgbwdNCX3qJENRO
*  P/rvp5ngoCkpIxeGqSkPvWv+CA3IXS8FPs8Sl4HNPiAj3e9RBm2MxI1u4cn1HvgGg8yHgHLMG5JF
*  LzGsmotSQaqEwq2JtOlkjfOwEI+ZhbWQupj6gen2aGc5sW3J26H1usxtV2TQ7WRRxqnZGmlh20dW
*  4lo3kITYI+iapGlJXmrlDYh2CjkwggHcAgEAMIHDMIGuMQswCQYDVQQGEwJVUzELMAkGA1UECBMC
*  VVQxFzAVBgNVBAcTDlNhbHQgTGFrZSBDaXR5MR4wHAYDVQQKExVUaGUgVVNFUlRSVVNUIE5ldHdv
*  cmsxITAfBgNVBAsTGGh0dHA6Ly93d3cudXNlcnRydXN0LmNvbTE2MDQGA1UEAxMtVVROLVVTRVJG
*  aXJzdC1DbGllbnQgQXV0aGVudGljYXRpb24gYW5kIEVtYWlsAhAj50QEWUPwA+jXOiL8sMwXMA0G
*  CSqGSIb3DQEBAQUABIIBAFQ1cydWC4M9tdgAlCN03kP8eyuXajwT+5ByhOcJhjuCABg7U8w4Rx28
*  braGqV+TCBxjyMsqD0KcW49VT6ZHMpQ1yN8R72qDsidmfm9w3u0jVgsaaBkTJXMy4COY/3cZWmYG
*  dL3Qty8uFeQYddytt6UPJpGJZYsrdFG2doe6qHiRtAxxPrd0GmQRcGvxyDdsojkoBlTMbfwaXOI3
*  xepR/oh60x/3npUCsl2VpNPfo6oZoej6YZGEuz2MvuWvXVhvuqoTqXGwGDgYMxwTbPwklqZiJtsK
*  r5Ep3NlWAQX8MGWL0H+NC22cqJuqUCL05yqyAv+JMCpZGAwOVb/wiVNjpAIwYAYJKoZIhvcNAQcB
*  MBkGCCqGSIb3DQMCMA0CAToECA5NAJY12cU+gDgZFUc+nsQUUbiR1GH8iBVLI+XWlja9TXEe1Hzt
*  NlsOylRVBDzjNxUtX/zC0YR7bs+2Cf4JbyuMOA==

RELEASE loMime
RELEASE loCert1
RELEASE loCert2