// 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;
}