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(PHP ActiveX) Verify and Unwrap S/MIME, and get Information about CMS Signature

Demonstrates calling the Verify method to verify and unwrap S/MIME. The MIME is restored to the original structure that it would have originally had prior to signing. The Verify method works with both detached signatures, as well as opaque/attached signatures.

Calls LastJsonData to get information about the signature(s) that were verified.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Mime')
$mime = new COM("Chilkat.Mime");

// Load the signed MIME from a file...
$success = $mime->LoadMimeFile('qa_data/mime/detached_sig.eml');
if ($success == 0) {
    print $mime->LastErrorText . "\n";
    exit;
}

// Verify the S/MIME and restore the MIME
// to the structure/content it had prior to signing.
$verified = $mime->Verify();
if ($verified == 0) {
    print $mime->LastErrorText . "\n";
    exit;
}

// Examine the details of what was verified.
// json is a Chilkat.JsonObject
$json = $mime->LastJsonData();
$json->EmitCompact = 0;
print $json->emit() . "\n";

// The code to parse the following JSON (i.e. extract desired information) is shown below..

// {
//   "pkcs7": {
//     "verify": {
//       "certs": [
//         {
//           "issuerCN": "VeriSign Class 1 Public Primary Certification Authority - G3",
//           "serial": "0702A21A85B84B659E180A6EE6F5A365"
//         },
//         {
//           "issuerCN": "VeriSign Class 1 Public Primary Certification Authority - G3",
//           "serial": "008B5B75568454850B00CFAF3848CEB1A4"
//         },
//         {
//           "issuerCN": "Symantec Class 1 Individual Subscriber CA - G5",
//           "serial": "619C55C32FF6BD1A7B7E0330D21C8F3C"
//         }
//       ],
//       "digestAlgorithms": [
//         "sha1"
//       ],
//       "signerInfo": [
//         {
//           "cert": {
//             "serialNumber": "619C55C32FF6BD1A7B7E0330D21C8F3C",
//             "issuerCN": "Symantec Class 1 Individual Subscriber CA - G5",
//             "digestAlgOid": "1.3.14.3.2.26",
//             "digestAlgName": "SHA1"
//           },
//           "contentType": "1.2.840.113549.1.7.1",
//           "signingTime": "160428055000Z",
//           "messageDigest": "2hJJVmO/jtaJV5uCKMFzIkRRvtY=",
//           "signingAlgOid": "1.2.840.113549.1.1.1",
//           "signingAlgName": "RSA-PKCSV-1_5",
//           "authAttr": {
//             "1.2.840.113549.1.9.3": {
//               "name": "contentType",
//               "oid": "1.2.840.113549.1.7.1"
//             },
//             "1.2.840.113549.1.9.5": {
//               "name": "signingTime",
//               "utctime": "160428055000Z"
//             },
//             "1.2.840.113549.1.9.4": {
//               "name": "messageDigest",
//               "digest": "2hJJVmO/jtaJV5uCKMFzIkRRvtY="
//             },
//             "1.2.840.113549.1.9.15": {
//               "der": "MFAwCwYJYIZIAWUDBAECMAoGCCqGSIb3DQMHMA4GCCqGSIb3DQMCAgIAgDANBggqhkiG9w0DAgIBQDAHBgUrDgMCBzANBggqhkiG9w0DAgIBKA=="
//             },
//             "1.3.6.1.4.1.311.16.4": {
//               "der": "MIG7MIG...7fgMw0hyPPA=="
//             }
//           }
//         }
//       ]
//     }
//   }
// }

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.DtObj')
$signingTime = new COM("Chilkat.DtObj");
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.DtObj')
$authAttrSigningTimeUtctime = new COM("Chilkat.DtObj");

$i = 0;
$count_i = $json->SizeOfArray('pkcs7.verify.certs');
while ($i < $count_i) {
    $json->I = $i;
    $issuerCN = $json->stringOf('pkcs7.verify.certs[i].issuerCN');
    $serial = $json->stringOf('pkcs7.verify.certs[i].serial');
    $i = $i + 1;
}

$i = 0;
$count_i = $json->SizeOfArray('pkcs7.verify.digestAlgorithms');
while ($i < $count_i) {
    $json->I = $i;
    $strVal = $json->stringOf('pkcs7.verify.digestAlgorithms[i]');
    $i = $i + 1;
}

$i = 0;
$count_i = $json->SizeOfArray('pkcs7.verify.signerInfo');
while ($i < $count_i) {
    $json->I = $i;
    $certSerialNumber = $json->stringOf('pkcs7.verify.signerInfo[i].cert.serialNumber');
    $certIssuerCN = $json->stringOf('pkcs7.verify.signerInfo[i].cert.issuerCN');
    $certDigestAlgOid = $json->stringOf('pkcs7.verify.signerInfo[i].cert.digestAlgOid');
    $certDigestAlgName = $json->stringOf('pkcs7.verify.signerInfo[i].cert.digestAlgName');
    $contentType = $json->stringOf('pkcs7.verify.signerInfo[i].contentType');
    $json->DtOf('pkcs7.verify.signerInfo[i].signingTime',0,$signingTime);
    $messageDigest = $json->stringOf('pkcs7.verify.signerInfo[i].messageDigest');
    $signingAlgOid = $json->stringOf('pkcs7.verify.signerInfo[i].signingAlgOid');
    $signingAlgName = $json->stringOf('pkcs7.verify.signerInfo[i].signingAlgName');
    $authAttrContentTypeName = $json->stringOf('pkcs7.verify.signerInfo[i].authAttr.\'1.2.840.113549.1.9.3\'.name');
    $authAttrContentTypeOid = $json->stringOf('pkcs7.verify.signerInfo[i].authAttr.\'1.2.840.113549.1.9.3\'.oid');
    $authAttrSigningTimeName = $json->stringOf('pkcs7.verify.signerInfo[i].authAttr.\'1.2.840.113549.1.9.5\'.name');
    $json->DtOf('pkcs7.verify.signerInfo[i].authAttr.\'1.2.840.113549.1.9.5\'.utctime',0,$authAttrSigningTimeUtctime);
    $authAttrMessageDigestName = $json->stringOf('pkcs7.verify.signerInfo[i].authAttr.\'1.2.840.113549.1.9.4\'.name');
    $authAttrMessageDigestDigest = $json->stringOf('pkcs7.verify.signerInfo[i].authAttr.\'1.2.840.113549.1.9.4\'.digest');
    $authAttr1_2_840_113549_1_9_15Der = $json->stringOf('pkcs7.verify.signerInfo[i].authAttr.\'1.2.840.113549.1.9.15\'.der');
    $authAttr1_3_6_1_4_1_311_16_4Der = $json->stringOf('pkcs7.verify.signerInfo[i].authAttr.\'1.3.6.1.4.1.311.16.4\'.der');
    $i = $i + 1;
}


?>

 

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