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(DataFlex) 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

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    String sPath
    Variant vJson
    Handle hoJson
    Handle hoValidator
    Boolean iValid
    String sIssuerCN
    String sSerial
    Variant vGenTime
    Handle hoGenTime
    Handle hoDt
    Integer i
    Integer iCount_i
    Integer iNumSigners
    Boolean iSuccess
    String sTemp1
    Boolean bTemp1

    // 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.
    Move "c:/someDir/something.dll" To sPath

    // 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.

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Set ComEmitCompact Of hoJson To False

    Get Create (RefClass(cComChilkatCodeSign)) To hoValidator
    If (Not(IsComObjectCreated(hoValidator))) Begin
        Send CreateComObject of hoValidator
    End
    Get pvComObject of hoJson to vJson
    Get ComVerifySignature Of hoValidator sPath vJson To iValid
    If (iValid = False) Begin
        // Validation failed.
        Get ComLastErrorText Of hoValidator To sTemp1
        Showln sTemp1
        // You can also examine the details of the validation (see below)
        Get ComEmit Of hoJson To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // 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"
    //             }
    //           ]
    //         }
    //       }
    //     }
    //   }
    // }

    Get Create (RefClass(cComChilkatDtObj)) To hoGenTime
    If (Not(IsComObjectCreated(hoGenTime))) Begin
        Send CreateComObject of hoGenTime
    End
    Get Create (RefClass(cComCkDateTime)) To hoDt
    If (Not(IsComObjectCreated(hoDt))) Begin
        Send CreateComObject of hoDt
    End

    // Show the certificates embedded in the PKCS7 signature.
    Showln "Certificates contained in the PKCS7 signature:"
    Move 0 To i
    Get ComSizeOfArray Of hoJson "pkcs7.verify.certs" To iCount_i
    While (i < iCount_i)
        Set ComI Of hoJson To i
        Get ComStringOf Of hoJson "pkcs7.verify.certs[i].issuerCN" To sIssuerCN
        Get ComStringOf Of hoJson "pkcs7.verify.certs[i].serial" To sSerial
        Showln sIssuerCN ", " sSerial
        Move (i + 1) To i
    Loop

    // Show details about the signing certificate(s)
    Get ComSizeOfArray Of hoJson "pkcs7.verify.signerInfo" To iNumSigners
    Move 0 To i
    While (i < iNumSigners)
        Set ComI Of hoJson To i
        Showln "---- Signing Certificate ----"
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].cert.serialNumber" To sTemp1
        Showln "serial number: " sTemp1
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].cert.issuerCN" To sTemp1
        Showln "issuerCN: " sTemp1
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].cert.digestAlgName" To sTemp1
        Showln "hash algorithm: " sTemp1
        Get ComStringOf Of hoJson "pkcs7.verify.signerInfo[i].signingAlgName" To sTemp1
        Showln "signing algorithm: " sTemp1

        // If this signature includes a timestamp token, get information about it.
        Get ComHasMember Of hoJson 'pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1"' To bTemp1
        If (bTemp1 = True) Begin
            // We're going to assume the timestamp token had only 1 signer..
            Showln "--- Timestamp Token ----"
            Get ComStringOf Of hoJson 'pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1".verify.digestAlgorithms[0]' To sTemp1
            Showln "TS hash algorithm: " sTemp1
            Get ComStringOf Of hoJson 'pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1".verify.signerInfo[0].cert.serialNumber' To sTemp1
            Showln "TS certificate serial: " sTemp1
            Get ComStringOf Of hoJson 'pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1".verify.signerInfo[0].cert.issuerCN' To sTemp1
            Showln "TS certificate issuerCN: " sTemp1
            Get ComBoolOf Of hoJson 'pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1".timestampSignatureVerified' To bTemp1
            Showln "timestamp signature verified: " bTemp1
            Get pvComObject of hoGenTime to vGenTime
            Get ComDtOf Of hoJson 'pkcs7.verify.signerInfo[i].unauthAttr."1.3.6.1.4.1.311.3.3.1".tstInfo.genTime' False vGenTime To iSuccess
            Get pvComObject of hoGenTime to vGenTime
            Get ComSetFromDtObj Of hoDt vGenTime To iSuccess
            Get ComGetAsRfc822 Of hoDt True To sTemp1
            Showln "timestamp date/time: " sTemp1
        End

        Move (i + 1) To i
    Loop

    Showln "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.


End_Procedure

 

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