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Lianja Examples

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(Lianja) PKCS7 Encrypt using Multiple Certificates

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.

Chilkat Lianja Extension Download

Chilkat Lianja Extension

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

loMime = createobject("CkMime")

// Build a simple MIME message to be encrypted:
llSuccess = loMime.AddHeaderField("Content-Type","text/plain")
llSuccess = 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("CkCert")
llSuccess = loCert1.LoadFromFile("myCert.cer")
if (llSuccess = .F.) then
    ? loCert1.LastErrorText
    release loMime
    release loCert1
    return
endif

// Load another cert ...
loCert2 = createobject("CkCert")
llSuccess = loCert2.LoadFromFile("anotherCert.cer")
if (llSuccess = .F.) then
    ? loCert2.LastErrorText
    release loMime
    release loCert1
    release loCert2
    return
endif

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

// Encrypt the MIME:
llSuccess = loMime.EncryptN()
if (llSuccess = .F.) then
    ? loMime.LastErrorText
    release loMime
    release loCert1
    release loCert2
    return
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

 

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