virtual P6R::P6ERR P6R::p6IDHKeyExchange::calculateSharedSecret ( const P6UCHAR *  pPublicKey, P6UINT32  keyLength, P6UCHAR *  pSharedSecret, P6UINT32  cBuffer, P6UINT32 *  pWritten  )

pure virtual

Key exchange between two parties requires each party to exchange their public keys.

Once this is done then the Diffie-Hellman algorithm can be used to compute the shared secret.

Parameters

pPublicKey	[ in ] The peer's DH public key (obtained by the caller of this method - e.g., SSH protocol)
keyLength	[ in ] Size in bytes of the data passed in by pPublicKey
pSharedSecret	[ out ] The shared secret, (or key), that has been exchanged (i.e., both sides compute). If NULL, then the required size of a buffer to hold the shared secret is returned in pWritten.
cBuffer	[ in ] Number of entries in the buffer pointed to by pSharedSecret.
pWritten	[ out ] Optional can be NULL, returns the number of bytes written into pSharedSecret. This parameter cannot be NULL when pSharedSecret is also NULL.

Returns

Success	P6R::eOk
Failure	eNotInitialized	A successful call to initialize was not made before this call.
	P6R::eInvalidArg	If pPublicKey is NULL. If pSharedSecret and pWritten are both NULL.
	P6R::eInvalidState	A call to genDHKeyPair() must be made before a call to this function.
	P6R::eTooSmall	The buffer pointed to by pSharedSecret is not large enough to hold the key data.
	P6R::eFailAndException	The shared secret calculation failed. Exception record provides detailed error info.