Implement AES in different modes of operation, using AES-NI and

nss/lib/freebl/intel-gcm.h

+/******************************************************************************/
+/* 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