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// PublicKey.h
// Declares the cPublicKey class representing a RSA public key in PolarSSL
#pragma once
#include "CtrDrbgContext.h"
#include "polarssl/pk.h"
class cPublicKey
{
public:
/** Constructs the public key out of the DER-encoded pubkey data */
cPublicKey(const AString & a_PublicKeyDER);
~cPublicKey();
/** Decrypts the data using the stored public key
Both a_EncryptedData and a_DecryptedData must be at least <KeySizeBytes> bytes large.
Returns the number of bytes decrypted, or negative number for error. */
int Decrypt(const Byte * a_EncryptedData, size_t a_EncryptedLength, Byte * a_DecryptedData, size_t a_DecryptedMaxLength);
/** Encrypts the data using the stored public key
Both a_EncryptedData and a_DecryptedData must be at least <KeySizeBytes> bytes large.
Returns the number of bytes decrypted, or negative number for error. */
int Encrypt(const Byte * a_PlainData, size_t a_PlainLength, Byte * a_EncryptedData, size_t a_EncryptedMaxLength);
protected:
/** The public key PolarSSL representation */
pk_context m_Pk;
/** The random generator used in encryption and decryption */
cCtrDrbgContext m_CtrDrbg;
} ;
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