/*
 * The OpenSAML License, Version 1.
 * Copyright (c) 2002
 * University Corporation for Advanced Internet Development, Inc.
 * All rights reserved
 *
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
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 * the following acknowledgment: "This product includes software developed by
 * the University Corporation for Advanced Internet Development
 * <http://www.ucaid.edu>Internet2 Project. Alternately, this acknowledegement
 * may appear in the software itself, if and wherever such third-party
 * acknowledgments normally appear.
 *
 * Neither the name of OpenSAML nor the names of its contributors, nor
 * Internet2, nor the University Corporation for Advanced Internet Development,
 * Inc., nor UCAID may be used to endorse or promote products derived from this
 * software without specific prior written permission. For written permission,
 * please contact opensaml@opensaml.org
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 * Products derived from this software may not be called OpenSAML, Internet2,
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 *
 *
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/* SAMLIdentifier.cpp - wraps ID generation functionality

   Scott Cantor
   5/22/02

   $History:$
*/

#include "internal.h"

#include <openssl/rand.h>

using namespace saml;
using namespace std;


SAMLIdentifier::SAMLIdentifier()
{
    unsigned char key[17];
    do
    {
        int ret=RAND_pseudo_bytes(key,16);
        if (ret<0)
            throw SAMLException("SAMLIdentifier() unable to generate a random identifier; was OpenSSL seeded?");
    } while ((key[0]>>4) < 10);
    
    char hexform[33];
    sprintf(hexform,"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
            key[0],key[1],key[2],key[3],key[4],key[5],key[6],key[7],
            key[8],key[9],key[10],key[11],key[12],key[13],key[14],key[15]);
    hexform[32]=0;
    m_buffer=XMLString::transcode(hexform);
}

SAMLIdentifier::~SAMLIdentifier()
{
    delete[] m_buffer;
}