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//
// Copyright (c) 2004 Intel Corporation 
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// modification, are permitted provided that the following conditions are met: 
//
// * Redistributions of source code must retain the above copyright notice, 
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///////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include <ipp.h>

#include "rsa.h"

char pTextSource[1024] = 
	"Gallia est omnis divisa in partes tres, quarum "
	"unam incolunt Belgae, aliam Aquitani, tertiam "
	"qui ipsorum lingua Celtae, nostra Galli appellantur. "
	"Hi omnis lingua, institutis, legibus inter se differunt.  "
	"Gallos ab Aquitanis Garumna flumen, a Belgis Matrona "
	"et Sequana dividit. ";

void main()
{
	IppStatus st;
	static const int keyLen = 256;
	RSAKeyGen keyGen(keyLen, keyLen/2);
	keyGen.GenerateKeys();

	BigNum plaintext(keyLen/32), cyphertext(keyLen/32),
		decodedtext(keyLen/32);

	char pTextDest[1024];
	int sign, i;
	for (i=0; i<strlen(pTextSource)+1; i+=keyLen/8)
	{
		plaintext.Set(1,(Ipp32u*)&pTextSource[i]);
		st = ippsRSAEncrypt(plaintext.GetBN(),
			cyphertext.GetBN(), keyGen.GetPublicKey());

		st = ippsRSADecrypt(cyphertext.GetBN(),
			decodedtext.GetBN(), keyGen.GetPrivateKey());
		decodedtext.Get(&sign, (Ipp32u*)&pTextDest[i]);
	}
	printf("Decoded text:\n%s\n", pTextDest);

	// The following code prepares the composite integer
	// and public key for distribution
	int nLen, pubKeyLen;
	Ipp32u pN[keyLen/32];
	Ipp32u pKey[keyLen/32];

	ippsRSAKeyGet(pN, &nLen, IppsRSAKeyN,
		keyGen.GetPublicKey());
	ippsRSAKeyGet(pKey, &pubKeyLen, IppsRSAKeyE,
		keyGen.GetPublicKey());

	printf("Compsite integer:\n");
	for (i=0; i<nLen; i++)
		printf("%x ",pN[i]);
	printf("\n");
	printf("Public key:\n");
	for (i=0; i<pubKeyLen; i++)
		printf("%x ",pKey[i]);
	printf("\n");
}