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(PHP Extension) IMAP Download and Verify Signed MIMEDownloads the unmodified MIME of a digitally signed email, saves the .p7s signature (and other MIME parts), then loads the email into a Chilkat email object (which unwraps the S/MIME and verifies the signature) and then saves attachments (if the MIME parts were not already saved).
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $imap = new CkImap(); // Connect to an IMAP server. // Use TLS $imap->put_Ssl(true); $imap->put_Port(993); $success = $imap->Connect('imap.someMailServer.com'); if ($success != true) { print $imap->lastErrorText() . "\n"; exit; } $success = $imap->Login('myLogin','myPassword'); if ($success != true) { print $imap->lastErrorText() . "\n"; exit; } // Select an IMAP mailbox $success = $imap->SelectMailbox('Inbox'); if ($success != true) { print $imap->lastErrorText() . "\n"; exit; } // Download the 1st email (as MIME) in the Inbox by sequence number. $sbMime = new CkStringBuilder(); $success = $imap->FetchSingleAsMimeSb(1,false,$sbMime); if ($success != true) { print $imap->lastErrorText() . "\n"; exit; } // Load it into a MIME object and check to see if it is signed $mime = new CkMime(); $mime->LoadMimeSb($sbMime); $alreadySavedParts = false; if ($mime->ContainsSignedParts() == true) { // This will save the .p7s and other parts... // sa is a CkStringArray $sa = $mime->ExtractPartsToFiles('qa_output'); if ($mime->get_LastMethodSuccess() == true) { $numFiles = $sa->get_Count(); $i = 0; while ($i < $numFiles) { print 'Created: ' . $sa->getString($i) . "\n"; $i = $i + 1; } $alreadySavedParts = true; } } // Load the MIME into an Email object. This unwraps the security layers and verifies signatures. $email = new CkEmail(); $email->SetFromMimeSb($sbMime); if ($email->get_ReceivedSigned() == true) { print 'This email was signed.' . "\n"; // Check to see if the signatures were verified. if ($email->get_SignaturesValid() == true) { print 'Digital signature(s) verified.' . "\n"; print 'Signer: ' . $email->signedBy() . "\n"; // The certificate used for signing may be obtained // by calling email.GetSignedByCert. // cert is a CkCert $cert = $email->GetSignedByCert(); if ($email->get_LastMethodSuccess() != true) { print 'Failed to get signing certificate object.' . "\n"; } else { print 'Signing cert: ' . $cert->subjectCN() . "\n"; } } } else { print 'Digital signature verification failed.' . "\n"; } if ($alreadySavedParts != true) { $email->SaveAllAttachments('qa_output'); } ?> |
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