Dart
Dart
Verify Authenticode Signature of EXE or DLL
See more Code Signing Examples
Demonstrates how to verify an Authenticode signed EXE or DLL.Note: Chilkat's code signing class was added in v9.5.0.97
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import 'package:chilkat/chilkat.dart';
void main() {
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// You can verify a signed DLL or EXE.
final path = 'c:/someDir/something.dll';
// The verify method returns an overall indicator of whether
// the EXE or DLL can be trusted or not.
// The details of the signature are emitted to the JSON object
// passed in the last argument.
final json = CkJsonObject();
json.emitCompact = false;
final validator = CkCodeSign();
try {
validator.verifySignature(path, json);
} on ChilkatException catch (e) {
// Validation failed.
print(e.lastErrorText);
// You can also examine the details of the validation (see below)
print(json.emit());
return;
}
// Examine the details of the Authenticode signature
// println json.Emit();
// An example of the JSON details of an authenticode signature, with selected parsing code, is shown below.
//
// Use this online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON
// {
// "pkcs7": {
// "verify": {
// "peFile": {
// "hashOid": "2.16.840.1.101.3.4.2.1",
// "hash": "q9tzWEcea8f8kaMXG8LpWNPe9JIW7aKccYWuL3mrCBw="
// },
// "certs": [
// {
// "issuerCN": "AAA Certificate Services",
// "serial": "48FC93B46055948D36A7C98A89D69416"
// },
// {
// "issuerCN": "Sectigo Public Code Signing Root R46",
// "serial": "621D6D0C52019E3B9079152089211C0A"
// },
// {
// "issuerCN": "Sectigo Public Code Signing CA R36",
// "serial": "3FF5B69109BFD4046C92CC0D18EE23C2"
// }
// ],
// "digestAlgorithms": [
// "sha256"
// ],
// "signerInfo": [
// {
// "cert": {
// "serialNumber": "3FF5B69109BFD4046C92CC0D18EE23C2",
// "issuerCN": "Sectigo Public Code Signing CA R36",
// "digestAlgOid": "2.16.840.1.101.3.4.2.1",
// "digestAlgName": "SHA256"
// },
// "contentType": "1.3.6.1.4.1.311.2.1.4",
// "messageDigest": "4MkPVkY4qdwoVAj5JcCvn3ISSS5yqtf1+KmIs/Ckni4=",
// "signingAlgOid": "1.2.840.113549.1.1.1",
// "signingAlgName": "RSA-PKCSV-1_5",
// "authAttr": {
// "1.3.6.1.4.1.311.2.1.12": {
// "der": "MAA="
// },
// "1.2.840.113549.1.9.3": {
// "name": "contentType",
// "oid": "1.3.6.1.4.1.311.2.1.4"
// },
// "1.3.6.1.4.1.311.2.1.11": {
// "der": "MAwGCisGAQQBgjcCARU="
// },
// "1.2.840.113549.1.9.4": {
// "name": "messageDigest",
// "digest": "4MkPVkY4qdwoVAj5JcCvn3ISSS5yqtf1+KmIs/Ckni4="
// }
// },
// "unauthAttr": {
// "1.3.6.1.4.1.311.3.3.1": {
// "name": "timestampToken",
// "der": "MIIXJwY ... QZej",
// "verify": {
// "digestAlgorithms": [
// "sha256"
// ],
// "signerInfo": [
// {
// "cert": {
// "serialNumber": "0544AFF3949D0839A6BFDB3F5FE56116",
// "issuerCN": "DigiCert Trusted G4 RSA4096 SHA256 TimeStamping CA",
// "digestAlgOid": "2.16.840.1.101.3.4.2.1",
// "digestAlgName": "SHA256"
// },
// "contentType": "1.2.840.113549.1.9.16.1.4",
// "signingTime": "240117124047Z",
// "messageDigest": "y6cKjJoRfgJwW+Dj29w3tEfWqVybz7Sg+d8opKQxCjM=",
// "signingAlgOid": "1.2.840.113549.1.1.1",
// "signingAlgName": "RSA-PKCSV-1_5",
// "authAttr": {
// "1.2.840.113549.1.9.3": {
// "name": "contentType",
// "oid": "1.2.840.113549.1.9.16.1.4"
// },
// "1.2.840.113549.1.9.5": {
// "name": "signingTime",
// "utctime": "240117124047Z"
// },
// "1.2.840.113549.1.9.16.2.12": {
// "name": "signingCertificate",
// "der": "MBowGDAWBBRm8CsywsLJD4JdzqqKycZPGZzPQA=="
// },
// "1.2.840.113549.1.9.4": {
// "name": "messageDigest",
// "digest": "y6cKjJoRfgJwW+Dj29w3tEfWqVybz7Sg+d8opKQxCjM="
// },
// "1.2.840.113549.1.9.16.2.47": {
// "name": "signingCertificateV2",
// "der": "MCYwJDAiBCDS9uRt7XQizNHUQFdoQTZvgoraVZquMxavTRqa1Ax4KA=="
// }
// }
// }
// ],
// "uncommonOptions": "NO_SIGCERTV2_OID,NoSigningCertV2IssuerSerial"
// },
// "timestampSignatureVerified": true,
// "tstInfo": {
// "tsaPolicyId": "2.16.840.1.114412.7.1",
// "messageImprint": {
// "hashAlg": "sha256",
// "digest": "JqY7U+30qScMnRQwnDfUYEikZwOLHMhKX0oo5zo4ils=",
// "digestMatches": true
// },
// "serialNumber": "6E4597E574BC909213565DAEBC0E4888",
// "genTime": "20240117124047Z"
// }
// }
// }
// }
// ],
// "pkcs7": {
// "verify": {
// "certs": [
// {
// "issuerCN": "DigiCert Trusted G4 RSA4096 SHA256 TimeStamping CA",
// "serial": "0544AFF3949D0839A6BFDB3F5FE56116"
// },
// {
// "issuerCN": "DigiCert Trusted Root G4",
// "serial": "073637B724547CD847ACFD28662A5E5B"
// },
// {
// "issuerCN": "DigiCert Assured ID Root CA",
// "serial": "0E9B188EF9D02DE7EFDB50E20840185A"
// }
// ]
// }
// }
// }
// }
// }
var issuerCN = '';
var serial = '';
final genTime = CkDtObj();
final dt = CkDateTime();
// Show the certificates embedded in the PKCS7 signature.
print('Certificates contained in the PKCS7 signature:');
var i = 0;
final countI = json.sizeOfArray('pkcs7.verify.certs');
while (i < countI) {
json.i = i;
issuerCN = json.stringOf('pkcs7.verify.certs[i].issuerCN');
serial = json.stringOf('pkcs7.verify.certs[i].serial');
print('$issuerCN, $serial');
i++;
}
// Show details about the signing certificate(s)
final numSigners = json.sizeOfArray('pkcs7.verify.signerInfo');
i = 0;
while (i < numSigners) {
json.i = i;
print('---- Signing Certificate ----');
print('serial number: ${json.stringOf('pkcs7.verify.signerInfo[i].cert.serialNumber')}');
print('issuerCN: ${json.stringOf('pkcs7.verify.signerInfo[i].cert.issuerCN')}');
print('hash algorithm: ${json.stringOf('pkcs7.verify.signerInfo[i].cert.digestAlgName')}');
print('signing algorithm: ${json.stringOf('pkcs7.verify.signerInfo[i].signingAlgName')}');
// If this signature includes a timestamp token, get information about it.
if (json.hasMember('pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1"')) {
// We're going to assume the timestamp token had only 1 signer..
print('--- Timestamp Token ----');
print('TS hash algorithm: ${json.stringOf('pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1".verify.digestAlgorithms[0]')}');
print('TS certificate serial: ${json.stringOf('pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1".verify.signerInfo[0].cert.serialNumber')}');
print('TS certificate issuerCN: ${json.stringOf('pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1".verify.signerInfo[0].cert.issuerCN')}');
print('timestamp signature verified: ${json.boolOf('pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1".timestampSignatureVerified')}');
json.dtOf('pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1".tstInfo.genTime', false, genTime);
dt.setFromDtObj(genTime);
print('timestamp date/time: ${dt.getAsRfc822(true)}');
}
i++;
}
print('The Authenticode signature is valid.');
// Sample output:
// Certificates contained in the PKCS7 signature:
// AAA Certificate Services, 48FC93B46055948D36A7C98A89D69416
// Sectigo Public Code Signing Root R46, 621D6D0C52019E3B9079152089211C0A
// Sectigo Public Code Signing CA R36, 3FF5B69109BFD4046C92CC0D18EE23C2
// ---- Signing Certificate ----
// serial number: 3FF5B69109BFD4046C92CC0D18EE23C2
// issuerCN: Sectigo Public Code Signing CA R36
// hash algorithm: SHA256
// signing algorithm: RSA-PKCSV-1_5
// --- Timestamp Token ----
// TS hash algorithm: sha256
// TS certificate serial: 0544AFF3949D0839A6BFDB3F5FE56116
// TS certificate issuerCN: DigiCert Trusted G4 RSA4096 SHA256 TimeStamping CA
// timestamp signature verified: True
// timestamp date/time: Wed, 17 Jan 2024 06:40:47 -0600
// The Authenticode signature is valid.
}