PHP ActiveX Requires Chilkat v11.0.0+

P7S - Access Signature Information (date/time, certificate used, etc.)

See more Digital Signatures Examples

Examine a PKCS7 signature (.p7s) and get information about it. PHP ActiveX

<?php

$success = 0;

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

//  First load the .p7s file into a BinData object..
$bd = new COM("Chilkat.BinData");
$success = $bd->LoadFile('qa_data/p7s/sample.p7s');
if ($success != 1) {
    print 'Failed to load .p7s file.' . "\n";
    exit;
}

$crypt = new COM("Chilkat.Crypt2");

//  Assuming this is a signature that contains the original data that was signed..
$success = $crypt->OpaqueVerifyBd($bd);
if ($success == 0) {
    print $crypt->LastErrorText . "\n";
    exit;
}

//  Examine the last JSON data after signature verification..
$json = new COM("Chilkat.JsonObject");
$crypt->GetLastJsonData($json);

$json->EmitCompact = 0;
print $json->emit() . "\n";

//  Sample output...
//  Go to http://tools.chilkat.io/jsonParse.cshtml
//  and paste the JSON into the online form to generate JSON parsing code.

//  {
//    "pkcs7": {
//      "verify": {
//        "digestAlgorithms": [
//          "sha256"
//        ],
//        "signerInfo": [
//          {
//            "cert": {
//              "serialNumber": "AAC5FC48C0FD8FBB",
//              "issuerCN": "AC ABCDEF RFB v5",
//              "issuerDN": "",
//              "digestAlgOid": "2.16.840.1.101.3.4.2.1",
//              "digestAlgName": "SHA-256"
//            },
//            "contentType": "1.2.840.113549.1.7.1",
//            "signingTime": "180607195054Z",
//            "messageDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8=",
//            "signingAlgOid": "1.2.840.113549.1.1.11",
//            "signerDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8="
//          },
//          {
//            "cert": {
//              "serialNumber": "324FB38ABD59723F",
//              "issuerCN": "AC ABCDEF RFB v5",
//              "issuerDN": "",
//              "digestAlgOid": "2.16.840.1.101.3.4.2.1",
//              "digestAlgName": "SHA-256"
//            },
//            "contentType": "1.2.840.113549.1.7.1",
//            "signingTime": "180608182517Z",
//            "messageDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8=",
//            "signingAlgOid": "1.2.840.113549.1.1.11",
//            "signerDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8="
//          }
//        ]
//      }
//    }
//  }
//  

$dt = new COM("Chilkat.CkDateTime");

$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');
    $certIssuerDN = $json->stringOf('pkcs7.verify.signerInfo[i].cert.issuerDN');
    $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');
    $signingTime = $json->stringOf('pkcs7.verify.signerInfo[i].signingTime');

    //  The signingTime isin UTCTime format.
    //  UTCTime values take the form of either "YYMMDDhhmm[ss]Z" or "YYMMDDhhmm[ss](+|-)hhmm"
    //  Starting in Chilkat v9.5.0.77, the SetFromTimestamp method auto-recognizes the UTCTime format and parses it correctly.
    $success = $dt->SetFromTimestamp($signingTime);
    //  To get the signingTime in other date/time formats, look at the online reference documentation for CkDateTime.
    //  There are numerous methods such as GetAsDateTime, GetAsIso8601, GetAsUnixTime, GetAsRfc822, etc.

    $messageDigest = $json->stringOf('pkcs7.verify.signerInfo[i].messageDigest');
    $signingAlgOid = $json->stringOf('pkcs7.verify.signerInfo[i].signingAlgOid');
    $signerDigest = $json->stringOf('pkcs7.verify.signerInfo[i].signerDigest');
    $i = $i + 1;
}

//  println crypt.LastErrorText;
print 'Success.' . "\n";

?>