PHP
Chilkat2 PHP
Verify and Unwrap S/MIME, and get Information about CMS Signature
See more MIME Examples
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.
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<?php
use Chilkat2\DtObj;
use Chilkat2\JsonObject;
use Chilkat2\Mime;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
$mime = new Mime();
// Load the signed MIME from a file...
try {
$mime->LoadMimeFile('qa_data/mime/detached_sig.eml');
// Verify the S/MIME and restore the MIME
// to the structure/content it had prior to signing.
$mime->Verify();
} catch (\Chilkat2\Exception $e) {
echo $e->getMessage(), "\n";
exit;
}
// Examine the details of what was verified.
$json = new JsonObject();
$mime->GetLastJsonData($json);
$json->EmitCompact = false;
echo $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
$signingTime = new DtObj();
$authAttrSigningTimeUtctime = new DtObj();
$issuerCN = '';
$serial = '';
$strVal = '';
$certSerialNumber = '';
$certIssuerCN = '';
$certDigestAlgOid = '';
$certDigestAlgName = '';
$contentType = '';
$messageDigest = '';
$signingAlgOid = '';
$signingAlgName = '';
$authAttrContentTypeName = '';
$authAttrContentTypeOid = '';
$authAttrSigningTimeName = '';
$authAttrMessageDigestName = '';
$authAttrMessageDigestDigest = '';
$authAttr1_2_840_113549_1_9_15Der = '';
$authAttr1_3_6_1_4_1_311_16_4Der = '';
$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', false, $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', false, $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;
}