Index: src/base/PdfInputStream.cpp
===================================================================
--- src/base/PdfInputStream.cpp	(revision 1697)
+++ src/base/PdfInputStream.cpp	(working copy)
@@ -35,6 +35,7 @@
 
 #include "PdfInputDevice.h"
 #include "PdfDefinesPrivate.h"
+#include "PdfDate.h"
 
 #include <stdio.h>
 #include <string.h>
@@ -98,6 +99,24 @@
     return lLen;
 }
 
+PdfDate PdfFileInputStream::GetModifiedDate()
+{
+    
+    struct stat file_stat;
+    int fp = fileno(m_hFile);
+    fstat(fp, &file_stat);
+    return PdfDate(file_stat.st_mtime);
+}
+
+
+PdfDate PdfFileInputStream::GetCreationDate()
+{
+    struct stat file_stat;
+    int fp = fileno(m_hFile);
+    fstat(fp, &file_stat);
+    return PdfDate(file_stat.st_ctime);
+}
+
 FILE*
 PdfFileInputStream::GetHandle()
 {
Index: src/base/PdfInputStream.h
===================================================================
--- src/base/PdfInputStream.h	(revision 1697)
+++ src/base/PdfInputStream.h	(working copy)
@@ -35,6 +35,7 @@
 #define _PDF_INPUT_STREAM_H_
 
 #include "PdfDefines.h"
+#include "PdfDate.h"
 
 namespace PoDoFo {
 
@@ -103,6 +104,16 @@
      */
     pdf_long GetFileLength();
 
+    /** Get the modified date of the file.
+     * \return the file modified date
+     */
+    PdfDate GetModifiedDate();
+
+    /** Get the creation date of the file.
+    * \return the file creation date
+    */
+    PdfDate GetCreationDate();
+
     /** Get the internal FILE handle.
      *  \return the internal FILE handle
      */
Index: src/doc/PdfFileSpec.cpp
===================================================================
--- src/doc/PdfFileSpec.cpp	(revision 1697)
+++ src/doc/PdfFileSpec.cpp	(working copy)
@@ -39,6 +39,7 @@
 #include "base/PdfInputStream.h"
 #include "base/PdfObject.h"
 #include "base/PdfStream.h"
+#include "base/PdfDate.h"
 
 #include <sstream>
 
@@ -182,7 +183,7 @@
     // Add additional information about the embedded file to the stream
     PdfDictionary params;
     params.AddKey( "Size", static_cast<pdf_int64>(stream.GetFileLength()) );
-    // TODO: CreationDate and ModDate
+    AddDateParams(params, stream.GetCreationDate(), stream.GetModifiedDate());
     pStream->GetDictionary().AddKey("Params", params );
 }
 
@@ -291,7 +292,7 @@
     // Add additional information about the embedded file to the stream
     PdfDictionary params;
     params.AddKey( "Size", static_cast<pdf_int64>(stream.GetFileLength()) );
-    // TODO: CreationDate and ModDate
+    AddDateParams(params, stream.GetCreationDate(), stream.GetModifiedDate());
     pStream->GetDictionary().AddKey("Params", params );
 }
 
@@ -320,7 +321,7 @@
     return lastFrom;
 }
 
-void PdfFileSpec::EmbeddFileFromMem( PdfObject* pStream, const unsigned char* data, ptrdiff_t size ) const
+void PdfFileSpec::EmbeddFileFromMem( PdfObject* pStream, const unsigned char* data, ptrdiff_t size, const PdfDate* creation_date, const PdfDate* mod_date ) const
 {
     PdfMemoryInputStream memstream(reinterpret_cast<const char*>(data),size);
     pStream->GetStream()->Set( &memstream );
@@ -328,6 +329,17 @@
     // Add additional information about the embedded file to the stream
     PdfDictionary params;
     params.AddKey( "Size", static_cast<pdf_int64>(size) );
+    PdfDate creation_date_internal;
+    PdfDate mod_date_internal;
+    if (creation_date != NULL)
+    {
+        creation_date_internal = *creation_date;
+    }
+    if (mod_date != NULL)
+    {
+        mod_date_internal = *mod_date;
+    }
+    AddDateParams( params, creation_date_internal, mod_date_internal );
     pStream->GetDictionary().AddKey("Params", params );
 }
 
@@ -346,5 +358,15 @@
     PODOFO_RAISE_ERROR( ePdfError_InvalidDataType );
 }
 
+void PdfFileSpec::AddDateParams(PdfDictionary &params, const PdfDate &creation_date, const PdfDate &mod_date) const
+{
+    PdfString mod_date_string;
+    mod_date.ToString(mod_date_string);
+    params.AddKey("ModDate", mod_date_string);
+    PdfString creation_date_string;
+    creation_date.ToString(creation_date_string);
+    params.AddKey("CreationDate", creation_date_string);
+}
 
+
 };
Index: src/doc/PdfFileSpec.h
===================================================================
--- src/doc/PdfFileSpec.h	(revision 1697)
+++ src/doc/PdfFileSpec.h	(working copy)
@@ -38,6 +38,8 @@
 
 #include "podofo/base/PdfString.h"
 
+#include "base/PdfDate.h"
+
 #include "PdfElement.h"
 
 namespace PoDoFo {
@@ -125,8 +127,15 @@
     /* Petr P. Petrov 17 September 2009*/
     /** Embeds the file from memory
       */
-    void EmbeddFileFromMem( PdfObject* pStream, const unsigned char* data, ptrdiff_t size ) const;
+    void EmbeddFileFromMem( PdfObject* pStream, const unsigned char* data, ptrdiff_t size, const PdfDate* creation_date = NULL, const PdfDate* mod_date = NULL ) const;
 
+    /** Add creation date and modified date params to the given dictonary.
+     *  \param params add the dates to this dictionary
+     *  \param creation_date the creation date that will be added
+     *  \param mod_date the modified date that will be added
+     */
+    void AddDateParams( PdfDictionary &params, const PdfDate &creation_date, const PdfDate &mod_date ) const;
+
 };
 
 };