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(PowerBuilder) Validate CAdES-T Signature (.p7m)

Validates a CAdES-T CMS signature and extracts the time-stamp token and gets information about it. Also validates the time-stamp token.

Note: This example requires Chilkat v9.5.0.78 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Crypt
integer li_Success
oleobject loo_CmsOptions
oleobject loo_Json
integer i
integer li_Count_i
string ls_StrVal
string ls_CertSerialNumber
string ls_CertIssuerCN
string ls_CertIssuerDN
string ls_CertDigestAlgOid
string ls_CertDigestAlgName
string ls_ContentType
oleobject loo_SigningTime
string ls_MessageDigest
string ls_SigningAlgOid
string ls_SigningAlgName
string ls_AuthAttrContentTypeName
string ls_AuthAttrContentTypeOid
string ls_AuthAttrSigningTimeName
oleobject loo_AuthAttrSigningTimeUtctime
string ls_AuthAttrMessageDigestName
string ls_AuthAttrMessageDigestDigest
string ls_AuthAttrSigningCertificateV2Name
string ls_AuthAttrSigningCertificateV2Der
string ls_UnauthAttrTimestampTokenName
string ls_UnauthAttrTimestampTokenDer
integer li_UnauthAttrTimestampTokenTimestampSignatureVerified
string ls_UnauthAttrTimestampTokenTstInfoTsaPolicyId
string ls_UnauthAttrTimestampTokenTstInfoMessageImprintHashAlg
string ls_UnauthAttrTimestampTokenTstInfoMessageImprintDigest
integer li_UnauthAttrTimestampTokenTstInfoMessageImprintDigestMatches
string ls_UnauthAttrTimestampTokenTstInfoSerialNumber
oleobject loo_UnauthAttrTimestampTokenTstInfoGenTime
integer j
integer li_Count_j

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

loo_Crypt = create oleobject
li_rc = loo_Crypt.ConnectToNewObject("Chilkat_9_5_0.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Indicate that the CAdES-T timestamp tokens must also pass validation for the signature to be validated.
loo_CmsOptions = create oleobject
li_rc = loo_CmsOptions.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_CmsOptions.UpdateBool("ValidateTimestampTokens",1)
loo_Crypt.CmsOptions = loo_CmsOptions.Emit()

// Validate the .p7m and extract the original signed data to an output file.
// Note: The timestampToken is an unauthenticated attribute.  See the code below that parses the LastJsonData
// for details about examining timestampToken.
li_Success = loo_Crypt.VerifyP7M("qa_data/cades/CAdES-T/Signature-C-T-1.p7m","qa_output/out.dat")

// Get information about the CMS signature in the LastJsonData.
// The detailed results of the signature validation are available in LastJsonData.
// (If the non-success return status was caused by an error such as "file not found", then the
// LastJsonData would be empty.)
loo_Json = loo_Crypt.LastJsonData()
loo_Json.EmitCompact = 0
Write-Debug loo_Json.Emit()

// Here is a sample result:
// See the parsing code below..

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// {
//   "pkcs7": {
//     "verify": {
//       "digestAlgorithms": [
//         "sha256"
//       ],
//       "signerInfo": [
//         {
//           "cert": {
//             "serialNumber": "00DCB814678CDB",
//             "issuerCN": "LevelBCAOK",
//             "issuerDN": "",
//             "digestAlgOid": "2.16.840.1.101.3.4.2.1",
//             "digestAlgName": "SHA256"
//           },
//           "contentType": "1.2.840.113549.1.7.1",
//           "signingTime": "131203065741Z",
//           "messageDigest": "JJZt41Nt8VsYahP+Xti4rR3vBDkUfRd6gquItl6R5Os=",
//           "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": "131203065741Z"
//             },
//             "1.2.840.113549.1.9.4": {
//               "name": "messageDigest",
//               "digest": "JJZt41Nt8VsYahP+Xti4rR3vBDkUfRd6gquItl6R5Os="
//             },
//             "1.2.840.113549.1.9.16.2.47": {
//               "name": "signingCertificateV2",
//               "der": "MIGIMIGFMIGCBCBJrxOU0w0dWGsVovjLv9QDH3syB5mLVv3grSYA40x9IDBeMFOkUTBPMQswCQYDVQQGEwJGUjENMAsGA1UEChMERVRTSTEcMBoGA1UECwwTUGx1Z3Rlc3RzXzIwMTMtMjAxNDETMBEGA1UEAxMKTGV2ZWxCQ0FPSwIHANy4FGeM2w=="
//             }
//           },
//           "unauthAttr": {
//             "1.2.840.113549.1.9.16.2.14": {
//               "name": "timestampToken",
//               "der": "MIIL+AYJKoZI...u7CfcjURNTY=",
//               "verify": {
//                 "digestAlgorithms": [
//                   "sha256"
//                 ],
//                 "signerInfo": [
//                   {
//                     "cert": {
//                       "serialNumber": "01AA4592D36C61",
//                       "issuerCN": "RootCAOK",
//                       "issuerDN": "",
//                       "digestAlgOid": "2.16.840.1.101.3.4.2.1",
//                       "digestAlgName": "SHA256"
//                     },
//                     "contentType": "1.2.840.113549.1.9.16.1.4",
//                     "messageDigest": "NSsMUrfoyCQ0OszPE1YLx1j3EyyCiBmnE5Sua6ghu/Q=",
//                     "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"
//                       },
//                       "1.2.840.113549.1.9.4": {
//                         "name": "messageDigest",
//                         "digest": "NSsMUrfoyCQ0OszPE1YLx1j3EyyCiBmnE5Sua6ghu/Q="
//                       },
//                       "1.2.840.113549.1.9.16.2.47": {
//                         "name": "signingCertificateV2",
//                         "der": "MIGGMIGDMIGABCDB/np5UxvhcPnSxD2Kme+C88uXGCMWLAvFPHNvTApTWDBcMFGkTzBNMQswCQYDVQQGEwJGUjENMAsGA1UEChMERVRTSTEcMBoGA1UECwwTUGx1Z3Rlc3RzXzIwMTMtMjAxNDERMA8GA1UEAxMIUm9vdENBT0sCBwGqRZLTbGE="
//                       }
//                     }
//                   }
//                 ]
//               },
//               "timestampSignatureVerified": true,
//               "tstInfo": {
//                 "tsaPolicyId": "1.3.6.1.4.1.2706.2.2.5.2.1.1.1",
//                 "messageImprint": {
//                   "hashAlg": "sha256",
//                   "digest": "C8xEe9NA4X1cUyHGX9zG89ipmQ2byFs3aa+Xe4Fz2P0=",
//                   "digestMatches": true
//                 },
//                 "serialNumber": "313E162121D922",
//                 "genTime": "20131203065742Z"
//               }
//             }
//           }
//         }
//       ]
//     }
//   }
// }
// 

loo_SigningTime = create oleobject
li_rc = loo_SigningTime.ConnectToNewObject("Chilkat_9_5_0.DtObj")

loo_AuthAttrSigningTimeUtctime = create oleobject
li_rc = loo_AuthAttrSigningTimeUtctime.ConnectToNewObject("Chilkat_9_5_0.DtObj")

loo_UnauthAttrTimestampTokenTstInfoGenTime = create oleobject
li_rc = loo_UnauthAttrTimestampTokenTstInfoGenTime.ConnectToNewObject("Chilkat_9_5_0.DtObj")

// Iterate over the hash algorithms used in the signature.
i = 0
li_Count_i = loo_Json.SizeOfArray("pkcs7.verify.digestAlgorithms")
do while i < li_Count_i
    loo_Json.I = i
    ls_StrVal = loo_Json.StringOf("pkcs7.verify.digestAlgorithms[i]")
    i = i + 1
loop

// For each signer...
i = 0
li_Count_i = loo_Json.SizeOfArray("pkcs7.verify.signerInfo")
do while i < li_Count_i
    loo_Json.I = i

    // Get information about the certificate used by this signer.
    ls_CertSerialNumber = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.serialNumber")
    ls_CertIssuerCN = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.issuerCN")
    ls_CertIssuerDN = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.issuerDN")
    ls_CertDigestAlgOid = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgOid")
    ls_CertDigestAlgName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgName")

    // Get additional information for this signer, such as the signingTime, signature algorithm, etc.
    ls_ContentType = loo_Json.StringOf("pkcs7.verify.signerInfo[i].contentType")
    loo_Json.DtOf("pkcs7.verify.signerInfo[i].signingTime",0,loo_SigningTime)
    ls_MessageDigest = loo_Json.StringOf("pkcs7.verify.signerInfo[i].messageDigest")
    ls_SigningAlgOid = loo_Json.StringOf("pkcs7.verify.signerInfo[i].signingAlgOid")
    ls_SigningAlgName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].signingAlgName")

    // --------------------------------
    // Examine authenticated attributes.
    // --------------------------------

    // contentType
    if loo_Json.HasMember("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\"") = 1 then
        ls_AuthAttrContentTypeName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".name")
        ls_AuthAttrContentTypeOid = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".oid")
    end if

    // signingTime
    if loo_Json.HasMember("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\"") = 1 then
        ls_AuthAttrSigningTimeName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".name")
        loo_Json.DtOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".utctime",0,loo_AuthAttrSigningTimeUtctime)
    end if

    // messageDigest
    if loo_Json.HasMember("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\"") = 1 then
        ls_AuthAttrMessageDigestName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".name")
        ls_AuthAttrMessageDigestDigest = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".digest")
    end if

    // signingCertificateV2
    if loo_Json.HasMember("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.47\"") = 1 then
        ls_AuthAttrSigningCertificateV2Name = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.47\".name")
        ls_AuthAttrSigningCertificateV2Der = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.47\".der")
    end if

    // --------------------------------
    // Examine unauthenticated attributes.
    // --------------------------------

    // timestampToken  (the timestampToken is what makes this signature a CAdES-T)
    if loo_Json.HasMember("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\"") = 1 then

        ls_UnauthAttrTimestampTokenName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".name")
        ls_UnauthAttrTimestampTokenDer = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".der")

        // This is where we find out if the timestampToken's signature is valid.
        li_UnauthAttrTimestampTokenTimestampSignatureVerified = loo_Json.BoolOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".timestampSignatureVerified")

        ls_UnauthAttrTimestampTokenTstInfoTsaPolicyId = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.tsaPolicyId")
        ls_UnauthAttrTimestampTokenTstInfoMessageImprintHashAlg = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.messageImprint.hashAlg")
        ls_UnauthAttrTimestampTokenTstInfoMessageImprintDigest = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.messageImprint.digest")

        // Here is where we check to see if the digest in the timestampToken's messageImprint matches the digest of the signature of this signerInfo
        li_UnauthAttrTimestampTokenTstInfoMessageImprintDigestMatches = loo_Json.BoolOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.messageImprint.digestMatches")

        ls_UnauthAttrTimestampTokenTstInfoSerialNumber = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.serialNumber")

        // Here is where we get the date/time of the timestampToken (i.e. when it was timestamped)
        loo_Json.DtOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.genTime",0,loo_UnauthAttrTimestampTokenTstInfoGenTime)

        // The following code gets details about the validity of the timestampToken's signature...
        j = 0
        li_Count_j = loo_Json.SizeOfArray("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.digestAlgorithms")
        do while j < li_Count_j
            loo_Json.J = j
            ls_StrVal = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.digestAlgorithms[j]")
            j = j + 1
        loop
        j = 0
        li_Count_j = loo_Json.SizeOfArray("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo")
        do while j < li_Count_j
            loo_Json.J = j
            ls_CertSerialNumber = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].cert.serialNumber")
            ls_CertIssuerCN = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].cert.issuerCN")
            ls_CertIssuerDN = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].cert.issuerDN")
            ls_CertDigestAlgOid = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].cert.digestAlgOid")
            ls_CertDigestAlgName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].cert.digestAlgName")
            ls_ContentType = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].contentType")
            ls_MessageDigest = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].messageDigest")
            ls_SigningAlgOid = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].signingAlgOid")
            ls_SigningAlgName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].signingAlgName")
            ls_AuthAttrContentTypeName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.3\".name")
            ls_AuthAttrContentTypeOid = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.3\".oid")
            ls_AuthAttrMessageDigestName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.4\".name")
            ls_AuthAttrMessageDigestDigest = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.4\".digest")
            ls_AuthAttrSigningCertificateV2Name = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.16.2.47\".name")
            ls_AuthAttrSigningCertificateV2Der = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.16.2.47\".der")
            j = j + 1
        loop

    end if

    i = i + 1
loop

if li_Success <> 1 then
    Write-Debug loo_Crypt.LastErrorText
    Write-Debug "CAdES-T verification failed."
else
    Write-Debug "CAdES-T signature is valid."
end if

destroy loo_Json


destroy loo_Crypt
destroy loo_CmsOptions
destroy loo_SigningTime
destroy loo_AuthAttrSigningTimeUtctime
destroy loo_UnauthAttrTimestampTokenTstInfoGenTime

 

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