Lua Requires Chilkat v9.5.0.97+
Lua
Verify Authenticode Signature of EXE or DLL
See more Code Signing Examples
Demonstrates how to verify an Authenticode signed EXE or DLL.Chilkat Lua Downloads
local chilkat = require("chilkat")
-- 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.
local 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.
local json = chilkat.JsonObject.new()
json.emit_compact = false
local validator = chilkat.CodeSign.new()
local valid = validator:verify_signature(path, json)
if not valid then
-- Validation failed.
print(validator.last_error_text)
-- You can also examine the details of the validation (see below)
print(json:emit())
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"
-- }
-- ]
-- }
-- }
-- }
-- }
-- }
local issuerCN = ""
local serial = ""
local genTime = chilkat.DtObj.new()
local dt = chilkat.DateTime.new()
-- Show the certificates embedded in the PKCS7 signature.
print("Certificates contained in the PKCS7 signature:")
local i = 0
local count_i = json:size_of_array("pkcs7.verify.certs")
while i < count_i do
json.i = i
issuerCN = json:string_of("pkcs7.verify.certs[i].issuerCN")
serial = json:string_of("pkcs7.verify.certs[i].serial")
print(issuerCN .. ", " .. serial)
i = i + 1
end
-- Show details about the signing certificate(s)
local numSigners = json:size_of_array("pkcs7.verify.signerInfo")
i = 0
while i < numSigners do
json.i = i
print("---- Signing Certificate ----")
print("serial number: " .. json:string_of("pkcs7.verify.signerInfo[i].cert.serialNumber"))
print("issuerCN: " .. json:string_of("pkcs7.verify.signerInfo[i].cert.issuerCN"))
print("hash algorithm: " .. json:string_of("pkcs7.verify.signerInfo[i].cert.digestAlgName"))
print("signing algorithm: " .. json:string_of("pkcs7.verify.signerInfo[i].signingAlgName"))
-- If this signature includes a timestamp token, get information about it.
if json:has_member("pkcs7.verify.signerInfo[i].unauthAttr.\"1.3.6.1.4.1.311.3.3.1\"") then
-- We're going to assume the timestamp token had only 1 signer..
print("--- Timestamp Token ----")
print("TS hash algorithm: " .. json:string_of("pkcs7.verify.signerInfo[i].unauthAttr.\"1.3.6.1.4.1.311.3.3.1\".verify.digestAlgorithms[0]"))
print("TS certificate serial: " .. json:string_of("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:string_of("pkcs7.verify.signerInfo[i].unauthAttr.\"1.3.6.1.4.1.311.3.3.1\".verify.signerInfo[0].cert.issuerCN"))
print("timestamp signature verified: " .. tostring(json:bool_of("pkcs7.verify.signerInfo[i].unauthAttr.\"1.3.6.1.4.1.311.3.3.1\".timestampSignatureVerified")))
json:dt_of("pkcs7.verify.signerInfo[i].unauthAttr.\"1.3.6.1.4.1.311.3.3.1\".tstInfo.genTime", false, genTime)
dt:set_from_dt_obj(genTime)
print("timestamp date/time: " .. dt:get_as_rfc822(true))
end
i = i + 1
end
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.