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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo
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Roy Tam
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dcd9973243
150858 changed files with 23884658 additions and 0 deletions
254
security/nss/lib/freebl/intel-gcm-wrap.c
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254
security/nss/lib/freebl/intel-gcm-wrap.c
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* Copyright(c) 2013, Intel Corp. */
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/* Wrapper functions for Intel optimized implementation of AES-GCM */
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#ifdef USE_HW_AES
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#ifdef FREEBL_NO_DEPEND
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#include "stubs.h"
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#endif
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#include "blapii.h"
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#include "blapit.h"
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#include "gcm.h"
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#include "ctr.h"
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#include "secerr.h"
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#include "prtypes.h"
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#include "pkcs11t.h"
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#include <limits.h>
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#include "intel-gcm.h"
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#include "rijndael.h"
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#include <emmintrin.h>
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#include <tmmintrin.h>
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struct intel_AES_GCMContextStr {
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unsigned char Htbl[16 * AES_BLOCK_SIZE];
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unsigned char X0[AES_BLOCK_SIZE];
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unsigned char T[AES_BLOCK_SIZE];
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unsigned char CTR[AES_BLOCK_SIZE];
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AESContext *aes_context;
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unsigned long tagBits;
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unsigned long Alen;
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unsigned long Mlen;
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};
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intel_AES_GCMContext *
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intel_AES_GCM_CreateContext(void *context,
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freeblCipherFunc cipher,
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const unsigned char *params,
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unsigned int blocksize)
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{
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intel_AES_GCMContext *gcm = NULL;
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AESContext *aes = (AESContext *)context;
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const CK_GCM_PARAMS *gcmParams = (const CK_GCM_PARAMS *)params;
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unsigned char buff[AES_BLOCK_SIZE]; /* aux buffer */
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unsigned long IV_whole_len = gcmParams->ulIvLen & (~0xful);
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unsigned int IV_remainder_len = gcmParams->ulIvLen & 0xful;
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unsigned long AAD_whole_len = gcmParams->ulAADLen & (~0xful);
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unsigned int AAD_remainder_len = gcmParams->ulAADLen & 0xful;
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__m128i BSWAP_MASK = _mm_setr_epi8(15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0);
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__m128i ONE = _mm_set_epi32(0, 0, 0, 1);
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unsigned int j;
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SECStatus rv;
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if (blocksize != AES_BLOCK_SIZE) {
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PORT_SetError(SEC_ERROR_LIBRARY_FAILURE);
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return NULL;
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}
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gcm = PORT_ZNew(intel_AES_GCMContext);
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if (gcm == NULL) {
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return NULL;
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}
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/* initialize context fields */
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gcm->aes_context = aes;
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gcm->tagBits = gcmParams->ulTagBits;
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gcm->Alen = 0;
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gcm->Mlen = 0;
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/* first prepare H and its derivatives for ghash */
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intel_aes_gcmINIT(gcm->Htbl, (unsigned char *)aes->expandedKey, aes->Nr);
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/* Initial TAG value is zero */
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_mm_storeu_si128((__m128i *)gcm->T, _mm_setzero_si128());
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_mm_storeu_si128((__m128i *)gcm->X0, _mm_setzero_si128());
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/* Init the counter */
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if (gcmParams->ulIvLen == 12) {
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_mm_storeu_si128((__m128i *)gcm->CTR,
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_mm_setr_epi32(((unsigned int *)gcmParams->pIv)[0],
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((unsigned int *)gcmParams->pIv)[1],
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((unsigned int *)gcmParams->pIv)[2],
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0x01000000));
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} else {
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/* If IV size is not 96 bits, then the initial counter value is GHASH
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* of the IV */
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intel_aes_gcmAAD(gcm->Htbl, gcmParams->pIv, IV_whole_len, gcm->T);
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/* Partial block */
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if (IV_remainder_len) {
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PORT_Memset(buff, 0, AES_BLOCK_SIZE);
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PORT_Memcpy(buff, gcmParams->pIv + IV_whole_len, IV_remainder_len);
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intel_aes_gcmAAD(gcm->Htbl, buff, AES_BLOCK_SIZE, gcm->T);
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}
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intel_aes_gcmTAG(
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gcm->Htbl,
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gcm->T,
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gcmParams->ulIvLen,
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0,
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gcm->X0,
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gcm->CTR);
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/* TAG should be zero again */
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_mm_storeu_si128((__m128i *)gcm->T, _mm_setzero_si128());
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}
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/* Encrypt the initial counter, will be used to encrypt the GHASH value,
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* in the end */
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rv = (*cipher)(context, gcm->X0, &j, AES_BLOCK_SIZE, gcm->CTR,
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AES_BLOCK_SIZE, AES_BLOCK_SIZE);
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if (rv != SECSuccess) {
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goto loser;
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}
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/* Promote the counter by 1 */
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_mm_storeu_si128((__m128i *)gcm->CTR, _mm_shuffle_epi8(_mm_add_epi32(ONE, _mm_shuffle_epi8(_mm_loadu_si128((__m128i *)gcm->CTR), BSWAP_MASK)), BSWAP_MASK));
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/* Now hash AAD - it would actually make sense to seperate the context
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* creation from the AAD, because that would allow to reuse the H, which
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* only changes when the AES key changes, and not every package, like the
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* IV and AAD */
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intel_aes_gcmAAD(gcm->Htbl, gcmParams->pAAD, AAD_whole_len, gcm->T);
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if (AAD_remainder_len) {
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PORT_Memset(buff, 0, AES_BLOCK_SIZE);
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PORT_Memcpy(buff, gcmParams->pAAD + AAD_whole_len, AAD_remainder_len);
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intel_aes_gcmAAD(gcm->Htbl, buff, AES_BLOCK_SIZE, gcm->T);
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}
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gcm->Alen += gcmParams->ulAADLen;
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return gcm;
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loser:
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PORT_Free(gcm);
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return NULL;
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}
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void
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intel_AES_GCM_DestroyContext(intel_AES_GCMContext *gcm, PRBool freeit)
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{
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if (freeit) {
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PORT_Free(gcm);
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}
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}
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SECStatus
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intel_AES_GCM_EncryptUpdate(intel_AES_GCMContext *gcm,
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unsigned char *outbuf,
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unsigned int *outlen, unsigned int maxout,
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const unsigned char *inbuf, unsigned int inlen,
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unsigned int blocksize)
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{
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unsigned int tagBytes;
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unsigned char T[AES_BLOCK_SIZE];
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unsigned int j;
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tagBytes = (gcm->tagBits + (PR_BITS_PER_BYTE - 1)) / PR_BITS_PER_BYTE;
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if (UINT_MAX - inlen < tagBytes) {
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PORT_SetError(SEC_ERROR_INPUT_LEN);
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return SECFailure;
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}
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if (maxout < inlen + tagBytes) {
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*outlen = inlen + tagBytes;
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PORT_SetError(SEC_ERROR_OUTPUT_LEN);
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return SECFailure;
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}
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intel_aes_gcmENC(
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inbuf,
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outbuf,
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gcm,
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inlen);
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gcm->Mlen += inlen;
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intel_aes_gcmTAG(
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gcm->Htbl,
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gcm->T,
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gcm->Mlen,
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gcm->Alen,
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gcm->X0,
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T);
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*outlen = inlen + tagBytes;
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for (j = 0; j < tagBytes; j++) {
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outbuf[inlen + j] = T[j];
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}
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return SECSuccess;
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}
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SECStatus
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intel_AES_GCM_DecryptUpdate(intel_AES_GCMContext *gcm,
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unsigned char *outbuf,
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unsigned int *outlen, unsigned int maxout,
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const unsigned char *inbuf, unsigned int inlen,
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unsigned int blocksize)
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{
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unsigned int tagBytes;
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unsigned char T[AES_BLOCK_SIZE];
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const unsigned char *intag;
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tagBytes = (gcm->tagBits + (PR_BITS_PER_BYTE - 1)) / PR_BITS_PER_BYTE;
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/* get the authentication block */
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if (inlen < tagBytes) {
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PORT_SetError(SEC_ERROR_INPUT_LEN);
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return SECFailure;
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}
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inlen -= tagBytes;
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intag = inbuf + inlen;
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if (maxout < inlen) {
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*outlen = inlen;
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PORT_SetError(SEC_ERROR_OUTPUT_LEN);
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return SECFailure;
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}
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intel_aes_gcmDEC(
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inbuf,
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outbuf,
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gcm,
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inlen);
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gcm->Mlen += inlen;
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intel_aes_gcmTAG(
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gcm->Htbl,
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gcm->T,
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gcm->Mlen,
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gcm->Alen,
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gcm->X0,
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T);
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if (NSS_SecureMemcmp(T, intag, tagBytes) != 0) {
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memset(outbuf, 0, inlen);
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*outlen = 0;
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/* force a CKR_ENCRYPTED_DATA_INVALID error at in softoken */
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PORT_SetError(SEC_ERROR_BAD_DATA);
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return SECFailure;
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}
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*outlen = inlen;
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return SECSuccess;
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}
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#endif
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