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(PowerBuilder) Validate PDF Signatures

See more PDF Signatures Examples

This example demonstrates how to validate the signatures in a PDF and also shows how to get information from each signature.

Note: This example requires Chilkat v9.5.0.85 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Pdf
integer li_Success
oleobject loo_SigInfo
integer li_NumSignatures
integer li_Validated
integer i
oleobject loo_Json
oleobject loo_UnauthAttrTimestampTokenTstInfoGenTime
oleobject loo_SigningTime
oleobject loo_AuthAttrSigningTimeUtctime
integer li_IntVal
string ls_StrVal
string ls_IssuerCN
string ls_Serial
string ls_CertSerialNumber
string ls_CertIssuerCN
string ls_CertDigestAlgOid
string ls_CertDigestAlgName
string ls_ContentType
string ls_MessageDigest
string ls_SigningAlgOid
string ls_SigningAlgName
string ls_AuthAttr1_2_840_113583_1_1_8Der
string ls_AuthAttrContentTypeName
string ls_AuthAttrContentTypeOid
string ls_AuthAttrMessageDigestName
string ls_AuthAttrMessageDigestDigest
string ls_UnauthAttrTimestampTokenName
string ls_UnauthAttrTimestampTokenDer
integer li_UnauthAttrTimestampTokenTimestampSignatureVerified
string ls_UnauthAttrTimestampTokenTstInfoTsaPolicyId
string ls_UnauthAttrTimestampTokenTstInfoMessageImprintHashAlg
string ls_UnauthAttrTimestampTokenTstInfoMessageImprintDigest
integer li_UnauthAttrTimestampTokenTstInfoMessageImprintDigestMatches
string ls_UnauthAttrTimestampTokenTstInfoSerialNumber
integer j
integer li_Count_j
string ls_AuthAttrSigningTimeName
string ls_AuthAttrSigningCertificateName
string ls_AuthAttrSigningCertificateDer
string ls_SignatureDictionary_Contents
string ls_SignatureDictionary_Filter
string ls_SignatureDictionary_M
string ls_SignatureDictionary_Name
string ls_SignatureDictionary_Prop_Build_App_Name
integer li_SignatureDictionary_Prop_Build_App_R
string ls_SignatureDictionary_Prop_Build_App_REx
integer li_SignatureDictionary_Prop_Build_App_TrustedMode
string ls_SignatureDictionary_Prop_Build_Filter_Date
string ls_SignatureDictionary_Prop_Build_Filter_Name
integer li_SignatureDictionary_Prop_Build_Filter_R
integer li_SignatureDictionary_Prop_Build_Filter_V
string ls_SignatureDictionary_Prop_Build_PubSec_Date
integer li_SignatureDictionary_Prop_Build_PubSec_NonEFontNoWarn
integer li_SignatureDictionary_Prop_Build_PubSec_R
string ls_SignatureDictionary_SubFilter
string ls_SignatureDictionary_Type
integer li_Count_i

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

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

// Load a PDF that has cryptographic signatures to be validated
li_Success = loo_Pdf.LoadFile("qa_data/pdf/sign_testing_1/helloSigned2.pdf")
if li_Success = 0 then
    Write-Debug loo_Pdf.LastErrorText
    destroy loo_Pdf
    return
end if

// Each time we verify a signature, information about the signature is written into
// sigInfo (replacing whatever sigInfo previously contained).
loo_SigInfo = create oleobject
li_rc = loo_SigInfo.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_SigInfo.EmitCompact = 0

// Iterate over each signature and validate each.
li_NumSignatures = loo_Pdf.NumSignatures
li_Validated = 0
i = 0
do while i < li_NumSignatures
    li_Validated = loo_Pdf.VerifySignature(i,loo_SigInfo)
    Write-Debug "Signature " + string(i) + " validated: " + string(li_Validated)
    Write-Debug loo_SigInfo.Emit()
    i = i + 1
loop

Write-Debug "Finished."

// When VerifySignature validates a signature, a lot of information is deposited into the JSON sigInfo object.
// The information can vary depending on what was included in the signature (for example, various authenticated attributes
// and unauthenticated attributes may or may not be included).
// Here is a sample of the information you'll see.
// 
// The following online tool can be used to generate code to parse any given JSON.
// Generate Parsing Code from JSON

// {
//   "validated": true,
//   "signatureDictionary": {         <--- This is the contents of the PDF Signature Dictionary for this signature.
//     "/ByteRange": [
//       0,
//       154682,
//       170512,
//       3233
//     ],
//     "/Contents": "<hex_data>",
//     "/Filter": "/Adobe.PPKLite",        <--- The meaning of the Signature Dictionary entries are defined in the PDF format specification document.
//     "/M": "D:20201006110216-05'00'",
//     "/Name": "yubikey rsa 1024 authentication",
//     "/Prop_Build": {
//       "/App": {
//         "/Name": "/Adobe#20Acrobat#20Pro#20DC",
//         "/OS": [
//           "/Win"
//         ],
//         "/R": 1313792,
//         "/REx": "2020.012.20048",
//         "/TrustedMode": true
//       },
//       "/Filter": {
//         "/Date": "Sep 11 2020 16:30:54",
//         "/Name": "/Adobe.PPKLite",
//         "/R": 131104,
//         "/V": 2
//       },
//       "/PubSec": {
//         "/Date": "Sep 11 2020 16:30:54",
//         "/NonEFontNoWarn": true,
//         "/R": 131105
//       }
//     },
//     "/SubFilter": "/adbe.pkcs7.detached",
//     "/Type": "/Sig"
//   },
//   "pkcs7": {          <--- This is the content of the CMS signature.
//     "verify": {
//       "certs": [      <--- Each signing certificate is listed here (by issuer common name and signing cert's serail number (in hex))
//         {
//           "issuerCN": "yubikey rsa 1024 authentication",
//           "serial": "66BE58138D761E92BC594A722932657BE26D421F"
//         }
//       ],
//       "digestAlgorithms": [
//         "sha256"
//       ],
//       "signerInfo": [     <--- contains data from each SignerInfo
//         {
//           "cert": {
//             "serialNumber": "66BE58138D761E92BC594A722932657BE26D421F",
//             "issuerCN": "yubikey rsa 1024 authentication",
//             "digestAlgOid": "2.16.840.1.101.3.4.2.1",
//             "digestAlgName": "SHA256"
//           },
//           "contentType": "1.2.840.113549.1.7.1",
//           "messageDigest": "btQOuSEvC31mdRFHtyEUPw8R9NuKfk0XPcQ6Lcmn6pk=",
//           "signingAlgOid": "1.2.840.113549.1.1.11",
//           "signingAlgName": "RSA-SHA256-PKCSV-1_5",
//           "authAttr": {     <--- CMS authenticated attributes are contained here.
//             "1.2.840.113583.1.1.8": {
//               "der": "MAA="
//             },
//             "1.2.840.113549.1.9.3": {
//               "name": "contentType",
//               "oid": "1.2.840.113549.1.7.1"
//             },
//             "1.2.840.113549.1.9.4": {
//               "name": "messageDigest",
//               "digest": "btQOuSEvC31mdRFHtyEUPw8R9NuKfk0XPcQ6Lcmn6pk="
//             }
//           },
//           "unauthAttr": {    <--- CMS unauthenticated attributes are contained here.
//             "1.2.840.113549.1.9.16.2.14": {
//               "name": "timestampToken",
//               "der": "MIIOvAYJKo ... Es/70g=",
//               "verify": {
//                 "digestAlgorithms": [
//                   "sha256"
//                 ],
//                 "signerInfo": [
//                   {
//                     "cert": {
//                       "serialNumber": "04CD3F8568AE76C61BB0FE7160CCA76D",
//                       "issuerCN": "DigiCert SHA2 Assured ID 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": "201006160423Z",
//                     "messageDigest": "Atv5Rj3kidB8IR6CplYiX3o6De/k8SC6JJ6uUPAGO0g=",
//                     "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": "201006160423Z"
//                       },
//                       "1.2.840.113549.1.9.16.2.12": {
//                         "name": "signingCertificate",
//                         "der": "MBowGDAWBBQDJb1QXtqWMC3CL0+gHkwovig0xQ=="
//                       },
//                       "1.2.840.113549.1.9.4": {
//                         "name": "messageDigest",
//                         "digest": "Atv5Rj3kidB8IR6CplYiX3o6De/k8SC6JJ6uUPAGO0g="
//                       }
//                     }
//                   }
//                 ]
//               },
//               "timestampSignatureVerified": true,
//               "tstInfo": {
//                 "tsaPolicyId": "2.16.840.1.114412.7.1",
//                 "messageImprint": {
//                   "hashAlg": "sha256",
//                   "digest": "gLJtrRWUSDfjzDkF1MfWG1wyHA6FrUJLkWMGRG+eMlA=",
//                   "digestMatches": true
//                 },
//                 "serialNumber": "00CE57E1113970607EF63B1D1160545321",
//                 "genTime": "20201006160423Z"
//               }
//             }
//           }
//         }
//       ],
//       "pkcs7": {
//         "verify": {
//           "certs": [
//             {
//               "issuerCN": "DigiCert SHA2 Assured ID Timestamping CA",
//               "serial": "04CD3F8568AE76C61BB0FE7160CCA76D"
//             },
//             {
//               "issuerCN": "DigiCert Assured ID Root CA",
//               "serial": "0AA125D6D6321B7E41E405DA3697C215"
//             }
//           ]
//         }
//       }
//     }
//   }
// }

// **** The point of this code is to show how to get at each desired piece of information contained in the signature.
// **** If your signature contains additional information not shown here, then you can use the online tool to generate the parse code.
// **** It is likely you're only interested in a few items of information, and therefore you wouldn't copy all of this code, but might
// **** choose to use bits and pieces to get the information you find important.

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

// Imagine that the "json" object contains the information obtained by validating a signature...
// The code below was generated using the online tool:  Generate Parsing Code from JSON

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

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")

li_Validated = loo_Json.BoolOf("validated")
ls_SignatureDictionary_Contents = loo_Json.StringOf("signatureDictionary./Contents")
ls_SignatureDictionary_Filter = loo_Json.StringOf("signatureDictionary./Filter")
ls_SignatureDictionary_M = loo_Json.StringOf("signatureDictionary./M")
ls_SignatureDictionary_Name = loo_Json.StringOf("signatureDictionary./Name")
ls_SignatureDictionary_Prop_Build_App_Name = loo_Json.StringOf("signatureDictionary./Prop_Build./App./Name")
li_SignatureDictionary_Prop_Build_App_R = loo_Json.IntOf("signatureDictionary./Prop_Build./App./R")
ls_SignatureDictionary_Prop_Build_App_REx = loo_Json.StringOf("signatureDictionary./Prop_Build./App./REx")
li_SignatureDictionary_Prop_Build_App_TrustedMode = loo_Json.BoolOf("signatureDictionary./Prop_Build./App./TrustedMode")
ls_SignatureDictionary_Prop_Build_Filter_Date = loo_Json.StringOf("signatureDictionary./Prop_Build./Filter./Date")
ls_SignatureDictionary_Prop_Build_Filter_Name = loo_Json.StringOf("signatureDictionary./Prop_Build./Filter./Name")
li_SignatureDictionary_Prop_Build_Filter_R = loo_Json.IntOf("signatureDictionary./Prop_Build./Filter./R")
li_SignatureDictionary_Prop_Build_Filter_V = loo_Json.IntOf("signatureDictionary./Prop_Build./Filter./V")
ls_SignatureDictionary_Prop_Build_PubSec_Date = loo_Json.StringOf("signatureDictionary./Prop_Build./PubSec./Date")
li_SignatureDictionary_Prop_Build_PubSec_NonEFontNoWarn = loo_Json.BoolOf("signatureDictionary./Prop_Build./PubSec./NonEFontNoWarn")
li_SignatureDictionary_Prop_Build_PubSec_R = loo_Json.IntOf("signatureDictionary./Prop_Build./PubSec./R")
ls_SignatureDictionary_SubFilter = loo_Json.StringOf("signatureDictionary./SubFilter")
ls_SignatureDictionary_Type = loo_Json.StringOf("signatureDictionary./Type")
i = 0
li_Count_i = loo_Json.SizeOfArray("signatureDictionary./ByteRange")
do while i < li_Count_i
    loo_Json.I = i
    li_IntVal = loo_Json.IntOf("signatureDictionary./ByteRange[i]")
    i = i + 1
loop
i = 0
li_Count_i = loo_Json.SizeOfArray("signatureDictionary./Prop_Build./App./OS")
do while i < li_Count_i
    loo_Json.I = i
    ls_StrVal = loo_Json.StringOf("signatureDictionary./Prop_Build./App./OS[i]")
    i = i + 1
loop
i = 0
li_Count_i = loo_Json.SizeOfArray("pkcs7.verify.certs")
do while i < li_Count_i
    loo_Json.I = i
    ls_IssuerCN = loo_Json.StringOf("pkcs7.verify.certs[i].issuerCN")
    ls_Serial = loo_Json.StringOf("pkcs7.verify.certs[i].serial")
    i = i + 1
loop
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
i = 0
li_Count_i = loo_Json.SizeOfArray("pkcs7.verify.signerInfo")
do while i < li_Count_i
    loo_Json.I = i
    ls_CertSerialNumber = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.serialNumber")
    ls_CertIssuerCN = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.issuerCN")
    ls_CertDigestAlgOid = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgOid")
    ls_CertDigestAlgName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgName")
    ls_ContentType = loo_Json.StringOf("pkcs7.verify.signerInfo[i].contentType")
    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")
    ls_AuthAttr1_2_840_113583_1_1_8Der = loo_Json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113583.1.1.8\".der")
    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")
    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")
    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")
    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")
    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")
    loo_Json.DtOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".tstInfo.genTime",0,loo_UnauthAttrTimestampTokenTstInfoGenTime)
    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_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")
        loo_Json.DtOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].signingTime",0,loo_SigningTime)
        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_AuthAttrSigningTimeName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.5\".name")
        loo_Json.DtOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.5\".utctime",0,loo_AuthAttrSigningTimeUtctime)
        ls_AuthAttrSigningCertificateName = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.16.2.12\".name")
        ls_AuthAttrSigningCertificateDer = loo_Json.StringOf("pkcs7.verify.signerInfo[i].unauthAttr.\"1.2.840.113549.1.9.16.2.14\".verify.signerInfo[j].authAttr.\"1.2.840.113549.1.9.16.2.12\".der")
        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")
        j = j + 1
    loop
    i = i + 1
loop
i = 0
li_Count_i = loo_Json.SizeOfArray("pkcs7.verify.pkcs7.verify.certs")
do while i < li_Count_i
    loo_Json.I = i
    ls_IssuerCN = loo_Json.StringOf("pkcs7.verify.pkcs7.verify.certs[i].issuerCN")
    ls_Serial = loo_Json.StringOf("pkcs7.verify.pkcs7.verify.certs[i].serial")
    i = i + 1
loop


destroy loo_Pdf
destroy loo_SigInfo
destroy loo_Json
destroy loo_UnauthAttrTimestampTokenTstInfoGenTime
destroy loo_SigningTime
destroy loo_AuthAttrSigningTimeUtctime

 

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