public static DOCXField[] GetSignatureFields(string DocxFile)
        {
            int rc;
            int NumOfFields = 0;

            SAPIContext ctxSigField = new SAPIContextClass();

            rc = SAPI.SignatureFieldEnumInit(
                hSession,
                ctxSigField,
                SAPI_ENUM_FILE_TYPE.SAPI_ENUM_FILE_OFFICE_XML_PACKAGE,
                DocxFile,
                0,
                ref NumOfFields);

            if (rc != 0)
            {
                throw new Exception("Failed in SAPISignatureFieldEnumInit (" + rc.ToString("X") + ")");
            }

            //There are no signature fields
            if (NumOfFields == 0)
            {
                return(null);
            }

            DOCXField[] Fields = new DOCXField[NumOfFields];

            for (int i = 0; i < NumOfFields; i++)
            {
                Fields[i] = new DOCXField();

                //Get Signature Field Handle
                rc = SAPI.SignatureFieldEnumCont(hSession, ctxSigField, out Fields[i].hSigField);
                if (rc != 0)
                {
                    throw new Exception("Failed in SignatureFieldEnumCont (" + rc.ToString("X") + ")");
                }


                //Get Signature Field Details
                rc = SAPI.SignatureFieldInfoGet(
                    hSession,
                    Fields[i].hSigField,
                    Fields[i].sSettings,
                    Fields[i].sInfo);

                if (rc != 0)
                {
                    throw new Exception("Failed in SignatureFieldInfoGet (" + rc.ToString("X") + ")");
                }
            }

            SAPI.ContextRelease(ctxSigField);

            return(Fields);
        }
Ejemplo n.º 2
0
        // This function is thread-safe and could be called by a few threads simoltaneously.
        // If FieldName parameter is NULL, a new field will be created, otherwise existing field will be signed
        // and all field-related parameters will be ignored
        public static void SAPI_sign_file(string FileName, string FieldName, string User, string Password, string SignPassword,
                                          int page, int x, int y, int height, int width,
                                          bool Invisible, string Reason, int AppearanceMask, string NewFieldName, string GraphImgName)
        {
            int            rc;
            SESHandle      SesHandle;
            SigFieldHandle sf = null;

            SAPICrypt SAPI = new SAPICrypt();

            if ((rc = SAPI.HandleAcquire(out SesHandle)) != 0)
            {
                throw new Exception("Failed in SAPIHandleAcquire() with rc = " + rc.ToString("X"));
            }

            //Logon
            if ((rc = SAPI.Logon(SesHandle, User, null, Password)) != 0)
            {
                SAPI.HandleRelease(SesHandle);
                throw new Exception("Failed to authenticate user with rc = " + rc.ToString("X"));
            }

            //Set Graphical Image if required
            if (GraphImgName != null && GraphImgName.Length > 1)
            {
                SAPIContext ctxGraphImg = new SAPIContext();

                //Start Graphical Images Enumeration
                if ((rc = SAPI.GraphicSigImageEnumInit(SesHandle, ctxGraphImg, AR_GR_SIG_DATA_FORMAT_ALL, 0)) != 0)
                {
                    SAPI.Logoff(SesHandle);
                    SAPI.HandleRelease(SesHandle);
                    throw new Exception("Failed to enumerate graphical signatures with rc = " + rc.ToString());
                }

                GraphicImageHandle hGrImg = null;
                bool isFound = false;
                while (((uint)(rc = SAPI.GraphicSigImageEnumCont(SesHandle, ctxGraphImg, out hGrImg))) != SAPI_ERROR_NO_MORE_ITEMS)
                {
                    if (rc != 0)
                    {
                        SAPI.ContextRelease(ctxGraphImg);
                        SAPI.Logoff(SesHandle);
                        SAPI.HandleRelease(SesHandle);
                        throw new Exception("Failed to retrieve next graphical signature with rc = " + rc.ToString());
                    }

                    //Get Graphical Signature Info
                    GraphicImageInfo giInfo = null;
                    if ((rc = SAPI.GraphicSigImageInfoGet(SesHandle, hGrImg, out giInfo,
                                                          SAPI_ENUM_GRAPHIC_IMAGE_FORMAT.SAPI_ENUM_GRAPHIC_IMAGE_NONE, 0)) != 0)
                    {
                        SAPI.ContextRelease(ctxGraphImg);
                        SAPI.HandleRelease(hGrImg);
                        SAPI.Logoff(SesHandle);
                        SAPI.HandleRelease(SesHandle);
                        throw new Exception("Failed to retrieve graphical signature info with rc = " + rc.ToString());
                    }

                    //Check if required Graphical image has been found
                    if (giInfo.Name.Trim().ToLower() == GraphImgName.Trim().ToLower())
                    {
                        //If found - set is as default Graph. Image
                        if ((rc = SAPI.GraphicSigImageSetDefault(SesHandle, hGrImg)) != 0)
                        {
                            SAPI.ContextRelease(ctxGraphImg);
                            SAPI.HandleRelease(hGrImg);
                            SAPI.Logoff(SesHandle);
                            SAPI.HandleRelease(SesHandle);
                            throw new Exception("Failed to define default graphical signature with rc = " + rc.ToString());
                        }

                        isFound = true;
                        SAPI.ContextRelease(ctxGraphImg);
                        SAPI.HandleRelease(hGrImg);
                        break;
                    }

                    SAPI.HandleRelease(hGrImg);
                }

                SAPI.ContextRelease(ctxGraphImg);

                //If required Graph Image wasn't found...
                if (!isFound)
                {
                    SAPI.Logoff(SesHandle);
                    SAPI.HandleRelease(SesHandle);
                    throw new Exception("Failed to find Graphical Image with name: " + GraphImgName);
                }
            }

            //Create new signature field
            if (FieldName == null)
            {
                SigFieldSettings SFS = new SigFieldSettings();
                TimeFormat       TF  = new TimeFormat();
                int Flags            = 0;

                //Define name of the new signature field
                if (NewFieldName.Length > 0)
                {
                    SFS.Name = NewFieldName;
                    Flags   |= AR_PDF_FLAG_FIELD_NAME_SET;
                }

                if (Invisible)
                {
                    SFS.Invisible = 1;
                    SFS.Page      = -1;
                }
                else
                {
                    // VISIBLE:
                    SFS.Invisible = 0;
                    // location:
                    SFS.Page   = page;
                    SFS.X      = x;
                    SFS.Y      = y;
                    SFS.Height = height;
                    SFS.Width  = width;
                    // appearance:
                    SFS.AppearanceMask = AppearanceMask;
                    SFS.LabelsMask     = AppearanceMask;
                    SFS.DependencyMode = SAPI_ENUM_DEPENDENCY_MODE.SAPI_ENUM_DEPENDENCY_MODE_INDEPENDENT;
                    SFS.SignatureType  = SAPI_ENUM_SIGNATURE_TYPE.SAPI_ENUM_SIGNATURE_DIGITAL;
                    SFS.Flags          = 0;
                    // time:
                    TF.DateFormat    = "dd MMM yyyy";
                    TF.TimeFormat    = "hh:mm:ss";
                    TF.ExtTimeFormat = SAPI_ENUM_EXTENDED_TIME_FORMAT.SAPI_ENUM_EXTENDED_TIME_FORMAT_NONE;
                    SFS.TimeFormat   = TF;
                }

                //Create the Field
                if ((rc = SAPI.SignatureFieldCreate(SesHandle, SAPI_ENUM_FILE_TYPE.SAPI_ENUM_FILE_ADOBE,
                                                    FileName, SFS, Flags, out sf)) != 0)
                {
                    SAPI.Logoff(SesHandle);
                    SAPI.HandleRelease(SesHandle);
                    throw new Exception("Failed to create new signature field with rc = " + rc.ToString("X"));
                }
            }

            //Find an existing signature field by name
            else
            {
                SAPIContext ctxField    = new SAPIContext();
                int         NumOfFields = 0;

                //Initiate the Signature Fields enumeration process
                if ((rc = SAPI.SignatureFieldEnumInit(SesHandle, ctxField, SAPI_ENUM_FILE_TYPE.SAPI_ENUM_FILE_ADOBE,
                                                      FileName, 0, ref NumOfFields)) != 0)
                {
                    SAPI.Logoff(SesHandle);
                    SAPI.HandleRelease(SesHandle);
                    throw new Exception("Failed to start signature field enumeration with rc = " + rc.ToString("X"));
                }

                bool isFound = false;
                for (int i = 0; i < NumOfFields; i++)
                {
                    //Get Next field's handle
                    if ((rc = SAPI.SignatureFieldEnumCont(SesHandle, ctxField, out sf)) != 0)
                    {
                        SAPI.ContextRelease(ctxField);
                        SAPI.Logoff(SesHandle);
                        SAPI.HandleRelease(SesHandle);
                        throw new Exception("Failed in signature fields enumeration with rc = " + rc.ToString("X"));
                    }

                    //Retrieve Signature Field's info
                    SigFieldSettings sfs = new SigFieldSettings();
                    SigFieldInfo     sfi = new SigFieldInfo();
                    if ((rc = SAPI.SignatureFieldInfoGet(SesHandle, sf, sfs, sfi)) != 0)
                    {
                        SAPI.HandleRelease(sf);
                        SAPI.ContextRelease(ctxField);
                        SAPI.Logoff(SesHandle);
                        SAPI.HandleRelease(SesHandle);
                        throw new Exception("Failed to retrieve signature field details with rc = " + rc.ToString("X"));
                    }

                    //Check that the field we've found is not signed. If Signed - just skip it.
                    if (sfi.IsSigned != 0)
                    {
                        continue;
                    }

                    if (sfs.Name == FieldName)
                    {
                        SAPI.ContextRelease(ctxField);
                        isFound = true;
                        break;
                    }

                    //Release handle of irrelevant signature field
                    SAPI.HandleRelease(sf);
                }

                if (!isFound)
                {
                    SAPI.ContextRelease(ctxField);
                    SAPI.Logoff(SesHandle);
                    SAPI.HandleRelease(SesHandle);
                    throw new Exception("The file doesn't contain any signature field named: " + FieldName);
                }
            }

            //Define the Reason
            if ((rc = SAPI.ConfigurationValueSet(SesHandle, SAPI_ENUM_CONF_ID.SAPI_ENUM_CONF_ID_REASON,
                                                 SAPI_ENUM_DATA_TYPE.SAPI_ENUM_DATA_TYPE_STR, Reason, 1)) != 0)
            {
                SAPI.HandleRelease(sf);
                SAPI.Logoff(SesHandle);
                SAPI.HandleRelease(SesHandle);
                throw new Exception("Failed in SAPIConfigurationValueSet with rc = " + rc.ToString("X"));
            }

            if (string.IsNullOrEmpty(SignPassword))
            {
                //Prompt-for-sign mode is disabled
                rc = SAPI.SignatureFieldSign(SesHandle, sf, 0);
            }
            else
            {
                //Prompt-for-sign mode is enabled
                rc = SAPI.SignatureFieldSignEx(SesHandle, sf, 0, SignPassword);
            }

            if (rc != 0)
            {
                SAPI.Logoff(SesHandle);
                SAPI.HandleRelease(sf);
                SAPI.HandleRelease(SesHandle);
                throw new Exception("Failed to Sign signature field with rc = " + rc.ToString("X"));
            }

            SAPI.Logoff(SesHandle);
            SAPI.HandleRelease(sf);
            SAPI.HandleRelease(SesHandle);
            return;
        }
Ejemplo n.º 3
0
        public static SignatureDetails ValidateXMLSignature(string SignedXML)
        {
            if (SignedXML == null)
            {
                throw new ArgumentNullException("SignedXML");
            }

            //Make sure the SAPI Library is loaded
            SAPIInit();
            SignatureDetails SigDetails         = new SignatureDetails();
            SigFieldSettings SigFieldSettings   = new SigFieldSettings();
            SigFieldInfo     SignatureFieldInfo = new SigFieldInfo();
            SAPICrypt        SAPI   = new SAPICrypt();
            SigFieldHandle   hField = null;
            int rc;

            SESHandle hSession = new SESHandle();

            if ((rc = SAPI.HandleAcquire(out hSession)) != 0)
            {
                throw new Exception(string.Format(
                                        "Memory allocation error (#{0})", rc.ToString("X")));
            }

            SAPIContext ctxValidateSignature = new SAPIContext();
            int         num = 0;

            if ((rc = SAPI.SignatureFieldEnumInit(hSession, ctxValidateSignature, SAPI_ENUM_FILE_TYPE.SAPI_ENUM_FILE_XML, SignedXML, 0, ref num)) != 0)
            {
                SAPI.HandleRelease(hSession);
                throw new Exception(string.Format(
                                        "An error occured while initializing the signature validation process (#{0})", rc.ToString("X")));
            }

            if (num < 1)
            {
                throw new Exception("The XML file is not signed!");
            }
            if (num > 1)
            {
                throw new Exception("SAPI only supports a single signature per XML file!");
            }

            if ((rc = SAPI.SignatureFieldEnumCont(hSession, ctxValidateSignature, out hField)) != 0)
            {
                SAPI.ContextRelease(ctxValidateSignature);
                SAPI.HandleRelease(hSession);
                throw new Exception(string.Format(
                                        "Failed to retrieve signature (#{0})", rc.ToString("X")));
            }

            if ((rc = SAPI.SignatureFieldInfoGet(hSession, hField, SigFieldSettings, SignatureFieldInfo)) != 0)
            {
                SAPI.ContextRelease(ctxValidateSignature);
                SAPI.HandleRelease(hSession);
                throw new Exception(string.Format(
                                        "Failed to parse signature details (#{0})", rc.ToString("X")));
            }

            CertStatus not_used = new CertStatus();

            SigDetails.isValid = SAPI.SignatureFieldVerify(hSession, hField, not_used, 0) == 0;

            SigDetails.SignerCertificate = new X509Certificate2(
                (byte[])(((SAPIByteArray)SignatureFieldInfo.Certificate).ToArray()));
            SigDetails.SignerName = SignatureFieldInfo.SignerName;

            //Convert FILE_TIME to ticks
            ulong filetime = SignatureFieldInfo.SignatureTime.HighDateTime;

            filetime <<= 32;
            filetime  += SignatureFieldInfo.SignatureTime.LowDateTime;
            SigDetails.SignatureTimeTicks = DateTime.FromFileTimeUtc((long)filetime).Ticks;

            //Cleanup memory
            SAPI.ContextRelease(ctxValidateSignature);
            SAPI.HandleRelease(hSession);

            return(SigDetails);
        }