RSACrypt.h

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#if !defined(_XBOX) && !defined(X360)

#ifndef RSA_CRYPT_HPP
#define RSA_CRYPT_HPP

#include "Platform.h"
#include "Export.h"

class RAK_DLL_EXPORT RSACrypt
{
        uint32_t *p, p_inv, *q, q_inv, *qInv, *dP, *dQ, factor_limbs;
        uint32_t e, *modulus, mod_inv, mod_limbs;

        void cleanup();

public:
        RSACrypt();
        ~RSACrypt();

public:
        bool setPrivateKey(const uint32_t *p, const uint32_t *q, int halfFactorLimbs);
        bool setPublicKey(const uint32_t *modulus, int mod_limbs, uint32_t e);

public:
        // Bitsize is limbs * 32
        // Private key size is limbs/2 words
        bool generatePrivateKey(uint32_t limbs); // limbs must be a multiple of 2

public:
        uint32_t getFactorLimbs();
        void getPrivateP(uint32_t *p); // p buffer has factor_limbs
        void getPrivateQ(uint32_t *q); // q buffer has factor_limbs

        uint32_t getModLimbs();
        void getPublicModulus(uint32_t *modulus); // modulus buffer has mod_limbs
        uint32_t getPublicExponent();

public:
        bool encrypt(uint32_t *ct, const uint32_t *pt); // pt limbs = mod_limbs
        bool decrypt(uint32_t *pt, const uint32_t *ct); // ct limbs = mod_limbs
};

#endif // RSA_CRYPT_HPP

#endif