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/******************************************************************************/
/* LICENSE: */
/* This submission to NSS is to be made available under the terms of the */
/* Mozilla Public License, v. 2.0. You can obtain one at http: */
/* //mozilla.org/MPL/2.0/. */
/******************************************************************************/
/* Copyright(c) 2013, Intel Corp. */
/******************************************************************************/
/* Reference: */
/* [1] Shay Gueron, Michael E. Kounavis: Intel® Carry-Less Multiplication */
/* Instruction and its Usage for Computing the GCM Mode (Rev. 2.01) */
/* http://software.intel.com/sites/default/files/article/165685/clmul-wp-r*/
/*ev-2.01-2012-09-21.pdf */
/* [2] S. Gueron, M. E. Kounavis: Efficient Implementation of the Galois */
/* Counter Mode Using a Carry-less Multiplier and a Fast Reduction */
/* Algorithm. Information Processing Letters 110: 549–553 (2010). */
/* [3] S. Gueron: AES Performance on the 2nd Generation Intel® Core™ Processor*/
/* Family (to be posted) (2012). */
/* [4] S. Gueron: Fast GHASH computations for speeding up AES-GCM (to be */
/* published) (2012). */
#ifndef INTEL_GCM_H
#define INTEL_GCM_H 1
#include "blapii.h"
typedef struct intel_AES_GCMContextStr intel_AES_GCMContext;
intel_AES_GCMContext *intel_AES_GCM_CreateContext(void *context, freeblCipherFunc cipher,
const unsigned char *params, unsigned int blocksize);
void intel_AES_GCM_DestroyContext(intel_AES_GCMContext *gcm, PRBool freeit);
SECStatus intel_AES_GCM_EncryptUpdate(intel_AES_GCMContext *gcm, unsigned char *outbuf,
unsigned int *outlen, unsigned int maxout,
const unsigned char *inbuf, unsigned int inlen,
unsigned int blocksize);
SECStatus intel_AES_GCM_DecryptUpdate(intel_AES_GCMContext *gcm, unsigned char *outbuf,
unsigned int *outlen, unsigned int maxout,
const unsigned char *inbuf, unsigned int inlen,
unsigned int blocksize);
/* Prorotypes of functions in the assembler file for fast AES-GCM, using
Intel AES-NI and CLMUL-NI, as described in [1]
[1] Shay Gueron, Michael E. Kounavis: Intel® Carry-Less Multiplication
Instruction and its Usage for Computing the GCM Mode */
/* Prepares the constants used in the aggregated reduction method */
void intel_aes_gcmINIT(unsigned char Htbl[16*16],
unsigned char *KS,
int NR);
/* Produces the final GHASH value */
void intel_aes_gcmTAG(unsigned char Htbl[16*16],
unsigned char *Tp,
unsigned long Mlen,
unsigned long Alen,
unsigned char* X0,
unsigned char* TAG);
/* Hashes the Additional Authenticated Data, should be used before enc/dec.
Operates on whole blocks only. Partial blocks should be padded externally. */
void intel_aes_gcmAAD(unsigned char Htbl[16*16],
unsigned char *AAD,
unsigned long Alen,
unsigned char *Tp);
/* Encrypts and hashes the Plaintext.
Operates on any length of data, however partial block should only be encrypted
at the last call, otherwise the result will be incorrect. */
void intel_aes_gcmENC(const unsigned char* PT,
unsigned char* CT,
void *Gctx,
unsigned long len);
/* Similar to ENC, but decrypts the Ciphertext. */
void intel_aes_gcmDEC(const unsigned char* CT,
unsigned char* PT,
void *Gctx,
unsigned long len);
#endif
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