(Xojo Plugin) Extract PKCS7 from MIME and Decrypt

Extracts the base64-encoded PKCS7 body of a MIME message to a file, and then decrypts using Chilkat Crypt2.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim mime As New Chilkat.Mime

Dim success As Boolean
success = mime.LoadMimeFile("c:/aaworkarea/EmailInBytes.txt")
If (success <> True) Then
    System.DebugLog(mime.LastErrorText)
    Return
End If

success = mime.SaveBody("c:/aaworkarea/smime.p7m")
If (success <> True) Then
    System.DebugLog(mime.LastErrorText)
    Return
End If

Dim crypt As New Chilkat.Crypt2

success = crypt.AddPfxSourceFile("c:/aaworkarea/my.pfx","pfxPassword")
If (success = False) Then
    System.DebugLog(crypt.LastErrorText)
    Return
End If

// Indicate the public-key (PKCS7) encryption/decryption should be used:
crypt.CryptAlgorithm = "pki"

Dim inPath As String
inPath = "c:/aaworkarea/smime.p7m"
Dim outPath As String
outPath = "c:/aaworkarea/decrypted.dat"

success = crypt.CkDecryptFile(inPath,outPath)
If (success = False) Then
    System.DebugLog(crypt.LastErrorText)
    Return
End If

System.DebugLog("Success.")