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/*
* CMS Encoding Base
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/cms_enc.h>
#include <botan/der_enc.h>
#include <botan/oids.h>
#include <botan/pem.h>
namespace Botan {
/*
* Setup the intitial layer of CMS data
*/
void CMS_Encoder::set_data(const byte buf[], u32bit length)
{
if(!data.empty())
throw Invalid_State("Cannot call CMS_Encoder::set_data here");
data.set(buf, length);
type = "CMS.DataContent";
}
/*
* Setup the intitial layer of CMS data
*/
void CMS_Encoder::set_data(const std::string& str)
{
set_data((const byte*)str.c_str(), str.length());
}
/*
* Finalize and return the CMS encoded data
*/
SecureVector<byte> CMS_Encoder::get_contents()
{
DER_Encoder encoder;
encoder.start_cons(SEQUENCE).
encode(OIDS::lookup(type)).
start_explicit(0).
raw_bytes(data).
end_explicit().
end_cons();
data.clear();
return encoder.get_contents();
}
/*
* Add a new layer of encapsulation
*/
void CMS_Encoder::add_layer(const std::string& oid, DER_Encoder& new_layer)
{
data = new_layer.get_contents();
type = oid;
}
/*
* Return the PEM-encoded data
*/
std::string CMS_Encoder::PEM_contents()
{
return PEM_Code::encode(get_contents(), "PKCS7");
}
/*
* Make an EncapsulatedContentInfo
*/
SecureVector<byte> CMS_Encoder::make_econtent(const SecureVector<byte>& data,
const std::string& type)
{
return DER_Encoder().start_cons(SEQUENCE).
encode(OIDS::lookup(type)).
start_explicit(0).
encode(data, OCTET_STRING).
end_explicit().
end_cons().
get_contents();
}
}
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