(Xojo Plugin) Decrypt a .p7m File (using a PFX)

Xojo Plugin sample code showing how to decrypt a .p7m using a .p12 / .pfx certificate w/ private key.

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

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

Dim crypt As New Chilkat.Crypt2

// Use a digital certificate and private key from a PFX file (.pfx or .p12).
Dim pfxPath As String
pfxPath = "myCertAndKey.pfx"
Dim pfxPassword As String
pfxPassword = "test123"

Dim success As Boolean
success = crypt.AddPfxSourceFile(pfxPath,pfxPassword)
If (success <> True) Then
    System.DebugLog(crypt.LastErrorText)
    Return
End If

// Set the  outPath to whatever is appropriate.
// If you are decrypting a PDF, your output might be "out.pdf"...
Dim inPath As String
inPath = "smime.p7m"
Dim outPath As String
outPath = "original.txt"

// Indicate that we're doing public key decryption (i.e. PKCS7)
crypt.CryptAlgorithm = "pki"

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

System.DebugLog("Success.")