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(Unicode C) Combine Timestamp Reply and Content File into a TimeStampDataDemonstrates how to combine a timestamp reply (RFC 3161) with a data file (any type of file) to create a TimeStampData structure (RFC 5544).
#include <C_CkBinDataW.h> #include <C_CkAsnW.h> #include <C_CkXmlW.h> void ChilkatSample(void) { HCkBinDataW bdTsr; BOOL success; HCkAsnW asnTsr; HCkXmlW xmlTsr; HCkBinDataW bdContent; HCkXmlW xml; HCkXmlW xContext; HCkAsnW tsd; const wchar_t *tsdBase64; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Also see this example: // Send a TimeStamp Request to a TimeStamp Authority and get the Response // Load a timestamp reply file bdTsr = CkBinDataW_Create(); success = CkBinDataW_LoadFile(bdTsr,L"qa_data/tsd/sample.tsr"); if (success != TRUE) { wprintf(L"Failed to load timestamp reply file.\n"); CkBinDataW_Dispose(bdTsr); return; } // Load the tsr into an ASN.1 object. asnTsr = CkAsnW_Create(); success = CkAsnW_LoadEncoded(asnTsr,CkBinDataW_getEncoded(bdTsr,L"base64"),L"base64"); if (success != TRUE) { wprintf(L"%s\n",CkAsnW_lastErrorText(asnTsr)); CkBinDataW_Dispose(bdTsr); CkAsnW_Dispose(asnTsr); return; } // Get the timestamp reply as XML. xmlTsr = CkXmlW_Create(); CkXmlW_LoadXml(xmlTsr,CkAsnW_asnToXml(asnTsr)); // The timestamp reply XML begins like this: // We'll want to remove the 1st "sequence" subtree. // <?xml version="1.0" encoding="utf-8"?> // <sequence> // <sequence> <---- Remove this sub-tree. // <int>00</int> // <sequence> // <utf8>Operation Okay</utf8> // </sequence> // </sequence> // <sequence> // <oid>1.2.840.113549.1.7.2</oid> // <contextSpecific tag="0" constructed="1"> // ... // Remove the 1st sub-tree.. CkXmlW_RemoveChildByIndex(xmlTsr,0); // In this example, the data file we're combining with the timestamp into a timestampData is a .p7m. // However, it can be any type of file (text or binary), it doesn't matter.. bdContent = CkBinDataW_Create(); success = CkBinDataW_LoadFile(bdContent,L"qa_data/tsd/sample.p7m"); if (success != TRUE) { wprintf(L"Failed to load content file.\n"); CkBinDataW_Dispose(bdTsr); CkAsnW_Dispose(asnTsr); CkXmlW_Dispose(xmlTsr); CkBinDataW_Dispose(bdContent); return; } // Begin building the TimeStampData. // We'll build as XML and then convert to ASN.1 xml = CkXmlW_Create(); CkXmlW_putTag(xml,L"sequence"); CkXmlW_UpdateChildContent(xml,L"oid",L"1.2.840.113549.1.9.16.1.31"); CkXmlW_UpdateAttrAt(xml,L"contextSpecific",TRUE,L"tag",L"0"); CkXmlW_UpdateAttrAt(xml,L"contextSpecific",TRUE,L"constructed",L"1"); CkXmlW_UpdateChildContent(xml,L"contextSpecific|sequence|int",L"01"); CkXmlW_UpdateChildContent(xml,L"contextSpecific|sequence|octets",CkBinDataW_getEncoded(bdContent,L"base64")); CkXmlW_UpdateAttrAt(xml,L"contextSpecific|sequence|contextSpecific",TRUE,L"tag",L"0"); CkXmlW_UpdateAttrAt(xml,L"contextSpecific|sequence|contextSpecific",TRUE,L"constructed",L"1"); xContext = CkXmlW_GetChildWithTag(xml,L"contextSpecific|sequence|contextSpecific"); CkXmlW_AddChildTree(xContext,xmlTsr); CkXmlW_Dispose(xContext); // Convert the XML to ASN.1 tsd = CkAsnW_Create(); CkAsnW_LoadAsnXml(tsd,CkXmlW_getXml(xml)); // Write the timestamped data to a file. success = CkAsnW_WriteBinaryDer(tsd,L"qa_output/sample.tsd"); // Alternatively, get the tsd ASN.1 as base64.. tsdBase64 = CkAsnW_getEncodedDer(tsd,L"base64_mime"); wprintf(L"%s\n",tsdBase64); CkBinDataW_Dispose(bdTsr); CkAsnW_Dispose(asnTsr); CkXmlW_Dispose(xmlTsr); CkBinDataW_Dispose(bdContent); CkXmlW_Dispose(xml); CkAsnW_Dispose(tsd); } |
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