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#include "cc_runtime_config.h"
#include "ccaes_vng_gcm.h"
#include "ccmode_internal.h"
/*!
* GCM multiply by H
* @param key The GCM state which holds the H value
* @param I The value to multiply H by
*/
void
ccmode_gcm_mult_h(ccgcm_ctx *key, unsigned char *I)
{
#if CCMODE_GCM_VNG_SPEEDUP
#ifdef __x86_64__
if (!(CC_HAS_AESNI() && CC_HAS_SupplementalSSE3())) {
//It can handle in and out buffers to be the same
ccmode_gcm_gf_mult(CCMODE_GCM_KEY_H(key), I, I);
return;
} else
#endif
{
// CCMODE_GCM_VNG_KEY_Htable must be the second argument. gcm_gmult() is not a general multiplier function.
gcm_gmult(I, CCMODE_GCM_VNG_KEY_Htable(key), I );
return;
}
#else
//It can handle in and out buffers to be the same
ccmode_gcm_gf_mult(CCMODE_GCM_KEY_H(key), I, I);
#endif
}