Jump to content
Lemonite

Verify or check digital signatures of a file

Recommended Posts

Lemonite

Hello! I'm new to autoit and I'm at my wit's end. I've searched on this forum on how to check or verify digital signatures but I haven't found a way so far. I would like to check if a file is digitally signed and if possible get the details and timestamp of it. If it's not possible, then I'm alright with just checking if it's signed. Digital signatures are found in the properties of the file and I've also attached an image.

Please do help me, thank you so much!

Screenshot_25.png

Share this post


Link to post
Share on other sites
mLipok

Interesting question. Waiting for other user answer.

 


Signature beginning:   Wondering who uses AutoIT and what it can be used for ?
* GHAPI UDF - modest begining - comunication with GitHub REST API *
ADO.au3 UDF     POP3.au3 UDF     XML.au3 UDF    How to use IE.au3  UDF with  AutoIt v3.3.14.x  for other useful stuff click the following button

Spoiler

Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind. 

My contribution (my own projects): * Debenu Quick PDF Library - UDF * Debenu PDF Viewer SDK - UDF * Acrobat Reader - ActiveX Viewer * UDF for PDFCreator v1.x.x * XZip - UDF * AppCompatFlags UDF * CrowdinAPI UDF * _WinMergeCompare2Files() * _JavaExceptionAdd() * _IsBeta() * Writing DPI Awareness App - workaround * _AutoIt_RequiredVersion() * Chilkatsoft.au3 UDF * TeamViewer.au3 UDF * JavaManagement UDF * VIES over SOAP * WinSCP UDF * GHAPI UDF - modest begining - comunication with GitHub REST API *

My contribution to others projects or UDF based on  others projects: * _sql.au3 UDF  * POP3.au3 UDF *  RTF Printer - UDF * XML.au3 UDF * ADO.au3 UDF SMTP Mailer UDF *

Useful links: * Forum Rules * Forum etiquette *  Forum Information and FAQs * How to post code on the forum * AutoIt Online Documentation * AutoIt Online Beta Documentation * SciTE4AutoIt3 getting started * Convert text blocks to AutoIt code * Games made in Autoit * Programming related sites * Polish AutoIt Tutorial * DllCall Code Generator * 

Wiki: Expand your knowledge - AutoIt Wiki * Collection of User Defined Functions * How to use HelpFile * Good coding practices in AutoIt * 

IE Related:  * How to use IE.au3  UDF with  AutoIt v3.3.14.x * Why isn't Autoit able to click a Javascript Dialog? * Clicking javascript button with no ID * IE document >> save as MHT file * IETab Switcher (by LarsJ ) * HTML Entities * _IEquerySelectorAll() (by uncommon) * 

I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

"Homo sum; humani nil a me alienum puto" - Publius Terentius Afer
"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

Signature last update: 2018-03-17

Share this post


Link to post
Share on other sites
SmOke_N

I used to use signtool.exe to do all my work if I remember correctly.

It had a verify param.

https://msdn.microsoft.com/en-us/library/8s9b9yaz(v=vs.100).aspx

  • Like 1

Common sense plays a role in the basics of understanding AutoIt... If you're lacking in that, do us all a favor, and step away from the computer.

Share this post


Link to post
Share on other sites
mLipok
  • Like 2

Signature beginning:   Wondering who uses AutoIT and what it can be used for ?
* GHAPI UDF - modest begining - comunication with GitHub REST API *
ADO.au3 UDF     POP3.au3 UDF     XML.au3 UDF    How to use IE.au3  UDF with  AutoIt v3.3.14.x  for other useful stuff click the following button

Spoiler

Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind. 

My contribution (my own projects): * Debenu Quick PDF Library - UDF * Debenu PDF Viewer SDK - UDF * Acrobat Reader - ActiveX Viewer * UDF for PDFCreator v1.x.x * XZip - UDF * AppCompatFlags UDF * CrowdinAPI UDF * _WinMergeCompare2Files() * _JavaExceptionAdd() * _IsBeta() * Writing DPI Awareness App - workaround * _AutoIt_RequiredVersion() * Chilkatsoft.au3 UDF * TeamViewer.au3 UDF * JavaManagement UDF * VIES over SOAP * WinSCP UDF * GHAPI UDF - modest begining - comunication with GitHub REST API *

My contribution to others projects or UDF based on  others projects: * _sql.au3 UDF  * POP3.au3 UDF *  RTF Printer - UDF * XML.au3 UDF * ADO.au3 UDF SMTP Mailer UDF *

Useful links: * Forum Rules * Forum etiquette *  Forum Information and FAQs * How to post code on the forum * AutoIt Online Documentation * AutoIt Online Beta Documentation * SciTE4AutoIt3 getting started * Convert text blocks to AutoIt code * Games made in Autoit * Programming related sites * Polish AutoIt Tutorial * DllCall Code Generator * 

Wiki: Expand your knowledge - AutoIt Wiki * Collection of User Defined Functions * How to use HelpFile * Good coding practices in AutoIt * 

IE Related:  * How to use IE.au3  UDF with  AutoIt v3.3.14.x * Why isn't Autoit able to click a Javascript Dialog? * Clicking javascript button with no ID * IE document >> save as MHT file * IETab Switcher (by LarsJ ) * HTML Entities * _IEquerySelectorAll() (by uncommon) * 

I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

"Homo sum; humani nil a me alienum puto" - Publius Terentius Afer
"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

Signature last update: 2018-03-17

Share this post


Link to post
Share on other sites
Lemonite

@mLipok, @SmOke_N

Thank you so much for the suggestions! I would like to do this using AutoIT (because of a request) but since it seems there isn't any known way yet, I'll check out the other tools above.

Again, thanks!

Share this post


Link to post
Share on other sites
Danyfirex

Hello. basically You need to traslate this to AutoIt.

#include <windows.h>
#include <wincrypt.h>
#include <wintrust.h>
#include <stdio.h>
#include <tchar.h>

#pragma comment(lib, "crypt32.lib")

#define ENCODING (X509_ASN_ENCODING | PKCS_7_ASN_ENCODING)

typedef struct {
    LPWSTR lpszProgramName;
    LPWSTR lpszPublisherLink;
    LPWSTR lpszMoreInfoLink;
} SPROG_PUBLISHERINFO, *PSPROG_PUBLISHERINFO;

BOOL GetProgAndPublisherInfo(PCMSG_SIGNER_INFO pSignerInfo,
                             PSPROG_PUBLISHERINFO Info);
BOOL GetDateOfTimeStamp(PCMSG_SIGNER_INFO pSignerInfo, SYSTEMTIME *st);
BOOL PrintCertificateInfo(PCCERT_CONTEXT pCertContext);
BOOL GetTimeStampSignerInfo(PCMSG_SIGNER_INFO pSignerInfo,
                            PCMSG_SIGNER_INFO *pCounterSignerInfo);

int _tmain(int argc, TCHAR *argv[])
{
    WCHAR  szFileName[MAX_PATH]= L"C:\\Program Files (x86)\\VideoLAN\\VLC\\vlc.exe"; 
    HCERTSTORE hStore = NULL;
    HCRYPTMSG hMsg = NULL; 
    PCCERT_CONTEXT pCertContext = NULL;
    BOOL fResult;   
    DWORD dwEncoding, dwContentType, dwFormatType;
    PCMSG_SIGNER_INFO pSignerInfo = NULL;
    PCMSG_SIGNER_INFO pCounterSignerInfo = NULL;
    DWORD dwSignerInfo;
    CERT_INFO CertInfo;     
    SPROG_PUBLISHERINFO ProgPubInfo;
    SYSTEMTIME st;

    ZeroMemory(&ProgPubInfo, sizeof(ProgPubInfo));
    __try
    {
       /* if (argc != 2)
        {
            _tprintf(_T("Usage: SignedFileInfo <filename>\n"));
            return 0;
        }
*/
#ifdef UNICODE
        lstrcpynW(szFileName, argv[1], MAX_PATH);
#else
        if (mbstowcs(szFileName, argv[1], MAX_PATH) == -1)
        {
            printf("Unable to convert to unicode.\n");
            __leave;
        }
#endif

        // Get message handle and store handle from the signed file.
        fResult = CryptQueryObject(CERT_QUERY_OBJECT_FILE,
                                   szFileName,
                                   CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED,
                                   CERT_QUERY_FORMAT_FLAG_BINARY,
                                   0,
                                   &dwEncoding,
                                   &dwContentType,
                                   &dwFormatType,
                                   &hStore,
                                   &hMsg,
                                   NULL);
        if (!fResult)
        {
            _tprintf(_T("CryptQueryObject failed with %x\n"), GetLastError());
            __leave;
        }

        // Get signer information size.
        fResult = CryptMsgGetParam(hMsg, 
                                   CMSG_SIGNER_INFO_PARAM, 
                                   0, 
                                   NULL, 
                                   &dwSignerInfo);
        if (!fResult)
        {
            _tprintf(_T("CryptMsgGetParam failed with %x\n"), GetLastError());
            __leave;
        }

        // Allocate memory for signer information.
        pSignerInfo = (PCMSG_SIGNER_INFO)LocalAlloc(LPTR, dwSignerInfo);
        if (!pSignerInfo)
        {
            _tprintf(_T("Unable to allocate memory for Signer Info.\n"));
            __leave;
        }

        // Get Signer Information.
        fResult = CryptMsgGetParam(hMsg, 
                                   CMSG_SIGNER_INFO_PARAM, 
                                   0, 
                                   (PVOID)pSignerInfo, 
                                   &dwSignerInfo);
        if (!fResult)
        {
            _tprintf(_T("CryptMsgGetParam failed with %x\n"), GetLastError());
            __leave;
        }
        
        // Get program name and publisher information from 
        // signer info structure.
        if (GetProgAndPublisherInfo(pSignerInfo, &ProgPubInfo))
        {
            if (ProgPubInfo.lpszProgramName != NULL)
            {
                wprintf(L"Program Name : %s\n",
                    ProgPubInfo.lpszProgramName);
            }

            if (ProgPubInfo.lpszPublisherLink != NULL)
            {
                wprintf(L"Publisher Link : %s\n",
                    ProgPubInfo.lpszPublisherLink);
            }

            if (ProgPubInfo.lpszMoreInfoLink != NULL)
            {
                wprintf(L"MoreInfo Link : %s\n",
                    ProgPubInfo.lpszMoreInfoLink);
            }
        }

        _tprintf(_T("\n"));

        // Search for the signer certificate in the temporary 
        // certificate store.
        CertInfo.Issuer = pSignerInfo->Issuer;
        CertInfo.SerialNumber = pSignerInfo->SerialNumber;

        pCertContext = CertFindCertificateInStore(hStore,
                                                  ENCODING,
                                                  0,
                                                  CERT_FIND_SUBJECT_CERT,
                                                  (PVOID)&CertInfo,
                                                  NULL);
        if (!pCertContext)
        {
            _tprintf(_T("CertFindCertificateInStore failed with %x\n"),
                GetLastError());
            __leave;
        }

        // Print Signer certificate information.
        _tprintf(_T("Signer Certificate:\n\n"));        
        PrintCertificateInfo(pCertContext);
        _tprintf(_T("\n"));
        
        // Get the timestamp certificate signerinfo structure.
        if (GetTimeStampSignerInfo(pSignerInfo, &pCounterSignerInfo))
        {
            // Search for Timestamp certificate in the temporary
            // certificate store.
            CertInfo.Issuer = pCounterSignerInfo->Issuer;
            CertInfo.SerialNumber = pCounterSignerInfo->SerialNumber;

            pCertContext = CertFindCertificateInStore(hStore,
                                                ENCODING,
                                                0,
                                                CERT_FIND_SUBJECT_CERT,
                                                (PVOID)&CertInfo,
                                                NULL);
            if (!pCertContext)
            {
                _tprintf(_T("CertFindCertificateInStore failed with %x\n"),
                    GetLastError());
                __leave;
            }

            // Print timestamp certificate information.
            _tprintf(_T("TimeStamp Certificate:\n\n"));
            PrintCertificateInfo(pCertContext);
            _tprintf(_T("\n"));

            // Find Date of timestamp.
            if (GetDateOfTimeStamp(pCounterSignerInfo, &st))
            {
                _tprintf(_T("Date of TimeStamp : %02d/%02d/%04d %02d:%02d\n"),
                                            st.wMonth,
                                            st.wDay,
                                            st.wYear,
                                            st.wHour,
                                            st.wMinute);
            }
            _tprintf(_T("\n"));
        }
    }
    __finally
    {               
        // Clean up.
        if (ProgPubInfo.lpszProgramName != NULL)
            LocalFree(ProgPubInfo.lpszProgramName);
        if (ProgPubInfo.lpszPublisherLink != NULL)
            LocalFree(ProgPubInfo.lpszPublisherLink);
        if (ProgPubInfo.lpszMoreInfoLink != NULL)
            LocalFree(ProgPubInfo.lpszMoreInfoLink);

        if (pSignerInfo != NULL) LocalFree(pSignerInfo);
        if (pCounterSignerInfo != NULL) LocalFree(pCounterSignerInfo);
        if (pCertContext != NULL) CertFreeCertificateContext(pCertContext);
        if (hStore != NULL) CertCloseStore(hStore, 0);
        if (hMsg != NULL) CryptMsgClose(hMsg);
    }
    return 0;
}

BOOL PrintCertificateInfo(PCCERT_CONTEXT pCertContext)
{
    BOOL fReturn = FALSE;
    LPTSTR szName = NULL;
    DWORD dwData;

    __try
    {
        // Print Serial Number.
        _tprintf(_T("Serial Number: "));
        dwData = pCertContext->pCertInfo->SerialNumber.cbData;
        for (DWORD n = 0; n < dwData; n++)
        {
            _tprintf(_T("%02x "),
              pCertContext->pCertInfo->SerialNumber.pbData[dwData - (n + 1)]);
        }
        _tprintf(_T("\n"));

        // Get Issuer name size.
        if (!(dwData = CertGetNameString(pCertContext, 
                                         CERT_NAME_SIMPLE_DISPLAY_TYPE,
                                         CERT_NAME_ISSUER_FLAG,
                                         NULL,
                                         NULL,
                                         0)))
        {
            _tprintf(_T("CertGetNameString failed.\n"));
            __leave;
        }

        // Allocate memory for Issuer name.
        szName = (LPTSTR)LocalAlloc(LPTR, dwData * sizeof(TCHAR));
        if (!szName)
        {
            _tprintf(_T("Unable to allocate memory for issuer name.\n"));
            __leave;
        }

        // Get Issuer name.
        if (!(CertGetNameString(pCertContext, 
                                CERT_NAME_SIMPLE_DISPLAY_TYPE,
                                CERT_NAME_ISSUER_FLAG,
                                NULL,
                                szName,
                                dwData)))
        {
            _tprintf(_T("CertGetNameString failed.\n"));
            __leave;
        }

        // print Issuer name.
        _tprintf(_T("Issuer Name: %s\n"), szName);
        LocalFree(szName);
        szName = NULL;

        // Get Subject name size.
        if (!(dwData = CertGetNameString(pCertContext, 
                                         CERT_NAME_SIMPLE_DISPLAY_TYPE,
                                         0,
                                         NULL,
                                         NULL,
                                         0)))
        {
            _tprintf(_T("CertGetNameString failed.\n"));
            __leave;
        }

        // Allocate memory for subject name.
        szName = (LPTSTR)LocalAlloc(LPTR, dwData * sizeof(TCHAR));
        if (!szName)
        {
            _tprintf(_T("Unable to allocate memory for subject name.\n"));
            __leave;
        }

        // Get subject name.
        if (!(CertGetNameString(pCertContext, 
                                CERT_NAME_SIMPLE_DISPLAY_TYPE,
                                0,
                                NULL,
                                szName,
                                dwData)))
        {
            _tprintf(_T("CertGetNameString failed.\n"));
            __leave;
        }

        // Print Subject Name.
        _tprintf(_T("Subject Name: %s\n"), szName);

        fReturn = TRUE;
    }
    __finally
    {
        if (szName != NULL) LocalFree(szName);
    }

    return fReturn;
}

LPWSTR AllocateAndCopyWideString(LPCWSTR inputString)
{
    LPWSTR outputString = NULL;

    outputString = (LPWSTR)LocalAlloc(LPTR,
        (wcslen(inputString) + 1) * sizeof(WCHAR));
    if (outputString != NULL)
    {
        lstrcpyW(outputString, inputString);
    }
    return outputString;
}

BOOL GetProgAndPublisherInfo(PCMSG_SIGNER_INFO pSignerInfo,
                             PSPROG_PUBLISHERINFO Info)
{
    BOOL fReturn = FALSE;
    PSPC_SP_OPUS_INFO OpusInfo = NULL;  
    DWORD dwData;
    BOOL fResult;
    
    __try
    {
        // Loop through authenticated attributes and find
        // SPC_SP_OPUS_INFO_OBJID OID.
        for (DWORD n = 0; n < pSignerInfo->AuthAttrs.cAttr; n++)
        {           
            if (lstrcmpA(SPC_SP_OPUS_INFO_OBJID, 
                        pSignerInfo->AuthAttrs.rgAttr[n].pszObjId) == 0)
            {
                // Get Size of SPC_SP_OPUS_INFO structure.
                fResult = CryptDecodeObject(ENCODING,
                            SPC_SP_OPUS_INFO_OBJID,
                            pSignerInfo->AuthAttrs.rgAttr[n].rgValue[0].pbData,
                            pSignerInfo->AuthAttrs.rgAttr[n].rgValue[0].cbData,
                            0,
                            NULL,
                            &dwData);
                if (!fResult)
                {
                    _tprintf(_T("CryptDecodeObject failed with %x\n"),
                        GetLastError());
                    __leave;
                }

                // Allocate memory for SPC_SP_OPUS_INFO structure.
                OpusInfo = (PSPC_SP_OPUS_INFO)LocalAlloc(LPTR, dwData);
                if (!OpusInfo)
                {
                    _tprintf(_T("Unable to allocate memory for Publisher Info.\n"));
                    __leave;
                }

                // Decode and get SPC_SP_OPUS_INFO structure.
                fResult = CryptDecodeObject(ENCODING,
                            SPC_SP_OPUS_INFO_OBJID,
                            pSignerInfo->AuthAttrs.rgAttr[n].rgValue[0].pbData,
                            pSignerInfo->AuthAttrs.rgAttr[n].rgValue[0].cbData,
                            0,
                            OpusInfo,
                            &dwData);
                if (!fResult)
                {
                    _tprintf(_T("CryptDecodeObject failed with %x\n"),
                        GetLastError());
                    __leave;
                }

                // Fill in Program Name if present.
                if (OpusInfo->pwszProgramName)
                {
                    Info->lpszProgramName =
                        AllocateAndCopyWideString(OpusInfo->pwszProgramName);
                }
                else
                    Info->lpszProgramName = NULL;

                // Fill in Publisher Information if present.
                if (OpusInfo->pPublisherInfo)
                {

                    switch (OpusInfo->pPublisherInfo->dwLinkChoice)
                    {
                        case SPC_URL_LINK_CHOICE:
                            Info->lpszPublisherLink =
                                AllocateAndCopyWideString(OpusInfo->pPublisherInfo->pwszUrl);
                            break;

                        case SPC_FILE_LINK_CHOICE:
                            Info->lpszPublisherLink =
                                AllocateAndCopyWideString(OpusInfo->pPublisherInfo->pwszFile);
                            break;

                        default:
                            Info->lpszPublisherLink = NULL;
                            break;
                    }
                }
                else
                {
                    Info->lpszPublisherLink = NULL;
                }

                // Fill in More Info if present.
                if (OpusInfo->pMoreInfo)
                {
                    switch (OpusInfo->pMoreInfo->dwLinkChoice)
                    {
                        case SPC_URL_LINK_CHOICE:
                            Info->lpszMoreInfoLink =
                                AllocateAndCopyWideString(OpusInfo->pMoreInfo->pwszUrl);
                            break;

                        case SPC_FILE_LINK_CHOICE:
                            Info->lpszMoreInfoLink =
                                AllocateAndCopyWideString(OpusInfo->pMoreInfo->pwszFile);
                            break;

                        default:
                            Info->lpszMoreInfoLink = NULL;
                            break;
                    }
                }               
                else
                {
                    Info->lpszMoreInfoLink = NULL;
                }

                fReturn = TRUE;

                break; // Break from for loop.
            } // lstrcmp SPC_SP_OPUS_INFO_OBJID                 
        } // for 
    }
    __finally
    {
        if (OpusInfo != NULL) LocalFree(OpusInfo);      
    }

    return fReturn;
}

BOOL GetDateOfTimeStamp(PCMSG_SIGNER_INFO pSignerInfo, SYSTEMTIME *st)
{   
    BOOL fResult;
    FILETIME lft, ft;   
    DWORD dwData;
    BOOL fReturn = FALSE;
    
    // Loop through authenticated attributes and find
    // szOID_RSA_signingTime OID.
    for (DWORD n = 0; n < pSignerInfo->AuthAttrs.cAttr; n++)
    {           
        if (lstrcmpA(szOID_RSA_signingTime, 
                    pSignerInfo->AuthAttrs.rgAttr[n].pszObjId) == 0)
        {               
            // Decode and get FILETIME structure.
            dwData = sizeof(ft);
            fResult = CryptDecodeObject(ENCODING,
                        szOID_RSA_signingTime,
                        pSignerInfo->AuthAttrs.rgAttr[n].rgValue[0].pbData,
                        pSignerInfo->AuthAttrs.rgAttr[n].rgValue[0].cbData,
                        0,
                        (PVOID)&ft,
                        &dwData);
            if (!fResult)
            {
                _tprintf(_T("CryptDecodeObject failed with %x\n"),
                    GetLastError());
                break;
            }

            // Convert to local time.
            FileTimeToLocalFileTime(&ft, &lft);
            FileTimeToSystemTime(&lft, st);

            fReturn = TRUE;

            break; // Break from for loop.
                        
        } //lstrcmp szOID_RSA_signingTime
    } // for 

    return fReturn;
}

BOOL GetTimeStampSignerInfo(PCMSG_SIGNER_INFO pSignerInfo, PCMSG_SIGNER_INFO *pCounterSignerInfo)
{   
    PCCERT_CONTEXT pCertContext = NULL;
    BOOL fReturn = FALSE;
    BOOL fResult;       
    DWORD dwSize;   

    __try
    {
        *pCounterSignerInfo = NULL;

        // Loop through unathenticated attributes for
        // szOID_RSA_counterSign OID.
        for (DWORD n = 0; n < pSignerInfo->UnauthAttrs.cAttr; n++)
        {
            if (lstrcmpA(pSignerInfo->UnauthAttrs.rgAttr[n].pszObjId, 
                         szOID_RSA_counterSign) == 0)
            {
                // Get size of CMSG_SIGNER_INFO structure.
                fResult = CryptDecodeObject(ENCODING,
                           PKCS7_SIGNER_INFO,
                           pSignerInfo->UnauthAttrs.rgAttr[n].rgValue[0].pbData,
                           pSignerInfo->UnauthAttrs.rgAttr[n].rgValue[0].cbData,
                           0,
                           NULL,
                           &dwSize);
                if (!fResult)
                {
                    _tprintf(_T("CryptDecodeObject failed with %x\n"),
                        GetLastError());
                    __leave;
                }

                // Allocate memory for CMSG_SIGNER_INFO.
                *pCounterSignerInfo = (PCMSG_SIGNER_INFO)LocalAlloc(LPTR, dwSize);
                if (!*pCounterSignerInfo)
                {
                    _tprintf(_T("Unable to allocate memory for timestamp info.\n"));
                    __leave;
                }

                // Decode and get CMSG_SIGNER_INFO structure
                // for timestamp certificate.
                fResult = CryptDecodeObject(ENCODING,
                           PKCS7_SIGNER_INFO,
                           pSignerInfo->UnauthAttrs.rgAttr[n].rgValue[0].pbData,
                           pSignerInfo->UnauthAttrs.rgAttr[n].rgValue[0].cbData,
                           0,
                           (PVOID)*pCounterSignerInfo,
                           &dwSize);
                if (!fResult)
                {
                    _tprintf(_T("CryptDecodeObject failed with %x\n"),
                        GetLastError());
                    __leave;
                }

                fReturn = TRUE;
                
                break; // Break from for loop.
            }           
        }
    }
    __finally
    {
        // Clean up.
        if (pCertContext != NULL) CertFreeCertificateContext(pCertContext);
    }

    return fReturn;
    
}

I really have not time to do it. but I hope you got it.

 

Saludos

  • Like 3

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×