(VB.NET) PKCS7 Decrypt Using .pfx or .p12 Data

See more MIME Examples

Demonstrates how to decrypt MIME using a specifc PFX file (.pfx or .p12) for the source of certificate(s) and private key(s).

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

Dim mime As New Chilkat.Mime


' Load the MIME
Dim success As Boolean = mime.LoadMimeFile("encrypted.mim")
If (success = False) Then
    Debug.WriteLine(mime.LastErrorText)
    Exit Sub
End If


Dim pfxData() As Byte
Dim fac As New Chilkat.FileAccess
pfxData = fac.ReadEntireFile("pfxStore/myPkcs12.p12")
If (fac.LastMethodSuccess <> True) Then
    Debug.WriteLine(fac.LastErrorText)
    Exit Sub
End If


Dim pfxPassword As String = "myPassword"
success = mime.DecryptUsingPfxData(pfxData,pfxPassword)
If (success = False) Then
    Debug.WriteLine(mime.LastErrorText)
    Exit Sub
End If


' Display the decrypted MIME:
Debug.WriteLine(mime.GetMime())


' Note: The MIME to be decrypted should look something like this
' when viewed in a text editor:
' (Note that the Content-Type is application/x-pkcs7-mime)

' Content-Disposition: attachment; filename="smime.p7m"
' Content-Transfer-Encoding: base64
' Content-Type: application/x-pkcs7-mime;
'  name="smime.p7m"
' 
' MIICRAYJKoZIhvcNAQcDoIICNTCCAjECAQAxggHIMIIBxAIBADCBqzCBlTELMAkGA1UEBhMCVVMx
' CzAJBgNVBAgTAlVUMRcwFQYDVQQHEw5TYWx0IExha2UgQ2l0eTEeMBwGA1UEChMVVGhlIFVTRVJU
' UlVTVCBOZXR3b3JrMSEwHwYDVQQLExhodHRwOi8vd3d3LnVzZXJ0cnVzdC5jb20xHTAbBgNVBAMT
' FFVUTi1VU0VSRmlyc3QtT2JqZWN0AhEA5vxolKNrYgp1Z7ABICdK+zANBgkqhkiG9w0BAQEFAASC
' AQAJ68jTh3u3ovsOuz1aHXTV90GBB6DMfCdx0bZ85trSvDXBevMOtQdctz653de8EB2xU4RlaPQa
' oBpF8G01PMaKezd+FGLbhm7gmKl7boej3BboUzM4wrwjc8qHTGc/haT1ZA3jUU3DR4emVXNmRgWc
' FDU5Dnkf+Z2YXQop9wPCf1Ng+8LLjBX9yxgXP1ZyFDe9vUnSkk2fmZatEY2Y6eWHNbrj6q4F40qN
' PAyZW1rJSFmKTSPSzv7S0VWBMh+FgUKtqk4I6/+zhneLYeJBZFskmMIGFpgKdgrN7vbbr1a2gv/M
' PbHUxwKMD4KZ2auyuGKMVLBOm+n8v5f8EegloL/UMGAGCSqGSIb3DQEHATAZBggqhkiG9w0DAjAN
' AgE6BAgcohHNLdl9FoA4q22x8vXs05wuScRgLhwMOzvdGQkBJx+6iQDBuoCVxF8sQ35g+0PPxN3M
' 6Zw6nI1gSIIKBS3ZjtI=