PKCS7 Decrypt Using .pfx or .p12 File

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

Downloads for Windows/Linux and Install Instructions

require 'rubygems'
require 'chilkat'

mime = Chilkat::CkMime.new()

success = mime.UnlockComponent("Anything for 30-day trial.")
if (success == false)
    print mime.lastErrorText() + "\n";
    exit
end

#  Load the MIME
success = mime.LoadMimeFile("encrypted.mim")
if (success == false)
    print mime.lastErrorText() + "\n";
    exit
end

#  Decrypt using a specific PFX file:
pfxPassword = "myPassword"
success = mime.DecryptUsingPfxFile("c:/myPfxFiles/myCertAndPrivateKey.pfx",pfxPassword)
if (success == false)
    print mime.lastErrorText() + "\n";
    exit
end

#  Display the decrypted MIME:
print mime.getMime() + "\n";

#  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"

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6Zw6nI1gSIIKBS3ZjtI=