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openssl/providers/implementations/ciphers/cipher_aes_cbc_hmac_sha256_hw.c
Matt Caswell f29dbb0866 Decreate the length after decryption for the stitched ciphers 
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/12288)
2020-07-06 09:26:09 +01:00

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/*
* Copyright 2011-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* All low level APIs are deprecated for public use, but still ok for internal
* use where we're using them to implement the higher level EVP interface, as is
* the case here.
*/
#include "internal/deprecated.h"
#include "cipher_aes_cbc_hmac_sha.h"
#if !defined(AES_CBC_HMAC_SHA_CAPABLE) || !defined(AESNI_CAPABLE)
int cipher_capable_aes_cbc_hmac_sha256(void)
{
return 0;
}
const PROV_CIPHER_HW_AES_HMAC_SHA *PROV_CIPHER_HW_aes_cbc_hmac_sha256(void)
{
return NULL;
}
#else
# include <openssl/rand.h>
# include "crypto/evp.h"
# include "internal/constant_time.h"
void sha256_block_data_order(void *c, const void *p, size_t len);
int aesni_cbc_sha256_enc(const void *inp, void *out, size_t blocks,
const AES_KEY *key, unsigned char iv[16],
SHA256_CTX *ctx, const void *in0);
int cipher_capable_aes_cbc_hmac_sha256(void)
{
return AESNI_CBC_HMAC_SHA_CAPABLE
&& aesni_cbc_sha256_enc(NULL, NULL, 0, NULL, NULL, NULL, NULL);
}
static int aesni_cbc_hmac_sha256_init_key(PROV_CIPHER_CTX *vctx,
const unsigned char *key,
size_t keylen)
{
int ret;
PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx;
PROV_AES_HMAC_SHA256_CTX *sctx = (PROV_AES_HMAC_SHA256_CTX *)vctx;
if (ctx->base.enc)
ret = aesni_set_encrypt_key(key, ctx->base.keylen * 8, &ctx->ks);
else
ret = aesni_set_decrypt_key(key, ctx->base.keylen * 8, &ctx->ks);
SHA256_Init(&sctx->head); /* handy when benchmarking */
sctx->tail = sctx->head;
sctx->md = sctx->head;
ctx->payload_length = NO_PAYLOAD_LENGTH;
vctx->removetlspad = SHA256_DIGEST_LENGTH + AES_BLOCK_SIZE;
return ret < 0 ? 0 : 1;
}
void sha256_block_data_order(void *c, const void *p, size_t len);
static void sha256_update(SHA256_CTX *c, const void *data, size_t len)
{
const unsigned char *ptr = data;
size_t res;
if ((res = c->num)) {
res = SHA256_CBLOCK - res;
if (len < res)
res = len;
SHA256_Update(c, ptr, res);
ptr += res;
len -= res;
}
res = len % SHA256_CBLOCK;
len -= res;
if (len) {
sha256_block_data_order(c, ptr, len / SHA256_CBLOCK);
ptr += len;
c->Nh += len >> 29;
c->Nl += len <<= 3;
if (c->Nl < (unsigned int)len)
c->Nh++;
}
if (res)
SHA256_Update(c, ptr, res);
}
# if !defined(OPENSSL_NO_MULTIBLOCK)
typedef struct {
unsigned int A[8], B[8], C[8], D[8], E[8], F[8], G[8], H[8];
} SHA256_MB_CTX;
typedef struct {
const unsigned char *ptr;
int blocks;
} HASH_DESC;
typedef struct {
const unsigned char *inp;
unsigned char *out;
int blocks;
u64 iv[2];
} CIPH_DESC;
void sha256_multi_block(SHA256_MB_CTX *, const HASH_DESC *, int);
void aesni_multi_cbc_encrypt(CIPH_DESC *, void *, int);
static size_t tls1_multi_block_encrypt(void *vctx,
unsigned char *out,
const unsigned char *inp,
size_t inp_len, int n4x)
{ /* n4x is 1 or 2 */
PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx;
PROV_AES_HMAC_SHA256_CTX *sctx = (PROV_AES_HMAC_SHA256_CTX *)vctx;
HASH_DESC hash_d[8], edges[8];
CIPH_DESC ciph_d[8];
unsigned char storage[sizeof(SHA256_MB_CTX) + 32];
union {
u64 q[16];
u32 d[32];
u8 c[128];
} blocks[8];
SHA256_MB_CTX *mctx;
unsigned int frag, last, packlen, i;
unsigned int x4 = 4 * n4x, minblocks, processed = 0;
size_t ret = 0;
u8 *IVs;
# if defined(BSWAP8)
u64 seqnum;
# endif
/* ask for IVs in bulk */
if (RAND_bytes_ex(ctx->base.libctx, (IVs = blocks[0].c), 16 * x4) <= 0)
return 0;
mctx = (SHA256_MB_CTX *) (storage + 32 - ((size_t)storage % 32)); /* align */
frag = (unsigned int)inp_len >> (1 + n4x);
last = (unsigned int)inp_len + frag - (frag << (1 + n4x));
if (last > frag && ((last + 13 + 9) % 64) < (x4 - 1)) {
frag++;
last -= x4 - 1;
}
packlen = 5 + 16 + ((frag + 32 + 16) & -16);
/* populate descriptors with pointers and IVs */
hash_d[0].ptr = inp;
ciph_d[0].inp = inp;
/* 5+16 is place for header and explicit IV */
ciph_d[0].out = out + 5 + 16;
memcpy(ciph_d[0].out - 16, IVs, 16);
memcpy(ciph_d[0].iv, IVs, 16);
IVs += 16;
for (i = 1; i < x4; i++) {
ciph_d[i].inp = hash_d[i].ptr = hash_d[i - 1].ptr + frag;
ciph_d[i].out = ciph_d[i - 1].out + packlen;
memcpy(ciph_d[i].out - 16, IVs, 16);
memcpy(ciph_d[i].iv, IVs, 16);
IVs += 16;
}
# if defined(BSWAP8)
memcpy(blocks[0].c, sctx->md.data, 8);
seqnum = BSWAP8(blocks[0].q[0]);
# endif
for (i = 0; i < x4; i++) {
unsigned int len = (i == (x4 - 1) ? last : frag);
# if !defined(BSWAP8)
unsigned int carry, j;
# endif
mctx->A[i] = sctx->md.h[0];
mctx->B[i] = sctx->md.h[1];
mctx->C[i] = sctx->md.h[2];
mctx->D[i] = sctx->md.h[3];
mctx->E[i] = sctx->md.h[4];
mctx->F[i] = sctx->md.h[5];
mctx->G[i] = sctx->md.h[6];
mctx->H[i] = sctx->md.h[7];
/* fix seqnum */
# if defined(BSWAP8)
blocks[i].q[0] = BSWAP8(seqnum + i);
# else
for (carry = i, j = 8; j--;) {
blocks[i].c[j] = ((u8 *)sctx->md.data)[j] + carry;
carry = (blocks[i].c[j] - carry) >> (sizeof(carry) * 8 - 1);
}
# endif
blocks[i].c[8] = ((u8 *)sctx->md.data)[8];
blocks[i].c[9] = ((u8 *)sctx->md.data)[9];
blocks[i].c[10] = ((u8 *)sctx->md.data)[10];
/* fix length */
blocks[i].c[11] = (u8)(len >> 8);
blocks[i].c[12] = (u8)(len);
memcpy(blocks[i].c + 13, hash_d[i].ptr, 64 - 13);
hash_d[i].ptr += 64 - 13;
hash_d[i].blocks = (len - (64 - 13)) / 64;
edges[i].ptr = blocks[i].c;
edges[i].blocks = 1;
}
/* hash 13-byte headers and first 64-13 bytes of inputs */
sha256_multi_block(mctx, edges, n4x);
/* hash bulk inputs */
# define MAXCHUNKSIZE 2048
# if MAXCHUNKSIZE%64
# error "MAXCHUNKSIZE is not divisible by 64"
# elif MAXCHUNKSIZE
/*
* goal is to minimize pressure on L1 cache by moving in shorter steps,
* so that hashed data is still in the cache by the time we encrypt it
*/
minblocks = ((frag <= last ? frag : last) - (64 - 13)) / 64;
if (minblocks > MAXCHUNKSIZE / 64) {
for (i = 0; i < x4; i++) {
edges[i].ptr = hash_d[i].ptr;
edges[i].blocks = MAXCHUNKSIZE / 64;
ciph_d[i].blocks = MAXCHUNKSIZE / 16;
}
do {
sha256_multi_block(mctx, edges, n4x);
aesni_multi_cbc_encrypt(ciph_d, &ctx->ks, n4x);
for (i = 0; i < x4; i++) {
edges[i].ptr = hash_d[i].ptr += MAXCHUNKSIZE;
hash_d[i].blocks -= MAXCHUNKSIZE / 64;
edges[i].blocks = MAXCHUNKSIZE / 64;
ciph_d[i].inp += MAXCHUNKSIZE;
ciph_d[i].out += MAXCHUNKSIZE;
ciph_d[i].blocks = MAXCHUNKSIZE / 16;
memcpy(ciph_d[i].iv, ciph_d[i].out - 16, 16);
}
processed += MAXCHUNKSIZE;
minblocks -= MAXCHUNKSIZE / 64;
} while (minblocks > MAXCHUNKSIZE / 64);
}
# endif
# undef MAXCHUNKSIZE
sha256_multi_block(mctx, hash_d, n4x);
memset(blocks, 0, sizeof(blocks));
for (i = 0; i < x4; i++) {
unsigned int len = (i == (x4 - 1) ? last : frag),
off = hash_d[i].blocks * 64;
const unsigned char *ptr = hash_d[i].ptr + off;
off = (len - processed) - (64 - 13) - off; /* remainder actually */
memcpy(blocks[i].c, ptr, off);
blocks[i].c[off] = 0x80;
len += 64 + 13; /* 64 is HMAC header */
len *= 8; /* convert to bits */
if (off < (64 - 8)) {
# ifdef BSWAP4
blocks[i].d[15] = BSWAP4(len);
# else
PUTU32(blocks[i].c + 60, len);
# endif
edges[i].blocks = 1;
} else {
# ifdef BSWAP4
blocks[i].d[31] = BSWAP4(len);
# else
PUTU32(blocks[i].c + 124, len);
# endif
edges[i].blocks = 2;
}
edges[i].ptr = blocks[i].c;
}
/* hash input tails and finalize */
sha256_multi_block(mctx, edges, n4x);
memset(blocks, 0, sizeof(blocks));
for (i = 0; i < x4; i++) {
# ifdef BSWAP4
blocks[i].d[0] = BSWAP4(mctx->A[i]);
mctx->A[i] = sctx->tail.h[0];
blocks[i].d[1] = BSWAP4(mctx->B[i]);
mctx->B[i] = sctx->tail.h[1];
blocks[i].d[2] = BSWAP4(mctx->C[i]);
mctx->C[i] = sctx->tail.h[2];
blocks[i].d[3] = BSWAP4(mctx->D[i]);
mctx->D[i] = sctx->tail.h[3];
blocks[i].d[4] = BSWAP4(mctx->E[i]);
mctx->E[i] = sctx->tail.h[4];
blocks[i].d[5] = BSWAP4(mctx->F[i]);
mctx->F[i] = sctx->tail.h[5];
blocks[i].d[6] = BSWAP4(mctx->G[i]);
mctx->G[i] = sctx->tail.h[6];
blocks[i].d[7] = BSWAP4(mctx->H[i]);
mctx->H[i] = sctx->tail.h[7];
blocks[i].c[32] = 0x80;
blocks[i].d[15] = BSWAP4((64 + 32) * 8);
# else
PUTU32(blocks[i].c + 0, mctx->A[i]);
mctx->A[i] = sctx->tail.h[0];
PUTU32(blocks[i].c + 4, mctx->B[i]);
mctx->B[i] = sctx->tail.h[1];
PUTU32(blocks[i].c + 8, mctx->C[i]);
mctx->C[i] = sctx->tail.h[2];
PUTU32(blocks[i].c + 12, mctx->D[i]);
mctx->D[i] = sctx->tail.h[3];
PUTU32(blocks[i].c + 16, mctx->E[i]);
mctx->E[i] = sctx->tail.h[4];
PUTU32(blocks[i].c + 20, mctx->F[i]);
mctx->F[i] = sctx->tail.h[5];
PUTU32(blocks[i].c + 24, mctx->G[i]);
mctx->G[i] = sctx->tail.h[6];
PUTU32(blocks[i].c + 28, mctx->H[i]);
mctx->H[i] = sctx->tail.h[7];
blocks[i].c[32] = 0x80;
PUTU32(blocks[i].c + 60, (64 + 32) * 8);
# endif /* BSWAP */
edges[i].ptr = blocks[i].c;
edges[i].blocks = 1;
}
/* finalize MACs */
sha256_multi_block(mctx, edges, n4x);
for (i = 0; i < x4; i++) {
unsigned int len = (i == (x4 - 1) ? last : frag), pad, j;
unsigned char *out0 = out;
memcpy(ciph_d[i].out, ciph_d[i].inp, len - processed);
ciph_d[i].inp = ciph_d[i].out;
out += 5 + 16 + len;
/* write MAC */
PUTU32(out + 0, mctx->A[i]);
PUTU32(out + 4, mctx->B[i]);
PUTU32(out + 8, mctx->C[i]);
PUTU32(out + 12, mctx->D[i]);
PUTU32(out + 16, mctx->E[i]);
PUTU32(out + 20, mctx->F[i]);
PUTU32(out + 24, mctx->G[i]);
PUTU32(out + 28, mctx->H[i]);
out += 32;
len += 32;
/* pad */
pad = 15 - len % 16;
for (j = 0; j <= pad; j++)
*(out++) = pad;
len += pad + 1;
ciph_d[i].blocks = (len - processed) / 16;
len += 16; /* account for explicit iv */
/* arrange header */
out0[0] = ((u8 *)sctx->md.data)[8];
out0[1] = ((u8 *)sctx->md.data)[9];
out0[2] = ((u8 *)sctx->md.data)[10];
out0[3] = (u8)(len >> 8);
out0[4] = (u8)(len);
ret += len + 5;
inp += frag;
}
aesni_multi_cbc_encrypt(ciph_d, &ctx->ks, n4x);
OPENSSL_cleanse(blocks, sizeof(blocks));
OPENSSL_cleanse(mctx, sizeof(*mctx));
ctx->multiblock_encrypt_len = ret;
return ret;
}
# endif /* !OPENSSL_NO_MULTIBLOCK */
static int aesni_cbc_hmac_sha256_cipher(PROV_CIPHER_CTX *vctx,
unsigned char *out,
const unsigned char *in, size_t len)
{
PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx;
PROV_AES_HMAC_SHA256_CTX *sctx = (PROV_AES_HMAC_SHA256_CTX *)vctx;
unsigned int l;
size_t plen = ctx->payload_length;
size_t iv = 0; /* explicit IV in TLS 1.1 and * later */
size_t aes_off = 0, blocks;
size_t sha_off = SHA256_CBLOCK - sctx->md.num;
ctx->payload_length = NO_PAYLOAD_LENGTH;
if (len % AES_BLOCK_SIZE)
return 0;
if (ctx->base.enc) {
if (plen == NO_PAYLOAD_LENGTH)
plen = len;
else if (len !=
((plen + SHA256_DIGEST_LENGTH +
AES_BLOCK_SIZE) & -AES_BLOCK_SIZE))
return 0;
else if (ctx->aux.tls_ver >= TLS1_1_VERSION)
iv = AES_BLOCK_SIZE;
/*
* Assembly stitch handles AVX-capable processors, but its
* performance is not optimal on AMD Jaguar, ~40% worse, for
* unknown reasons. Incidentally processor in question supports
* AVX, but not AMD-specific XOP extension, which can be used
* to identify it and avoid stitch invocation. So that after we
* establish that current CPU supports AVX, we even see if it's
* either even XOP-capable Bulldozer-based or GenuineIntel one.
* But SHAEXT-capable go ahead...
*/
if (((OPENSSL_ia32cap_P[2] & (1 << 29)) || /* SHAEXT? */
((OPENSSL_ia32cap_P[1] & (1 << (60 - 32))) && /* AVX? */
((OPENSSL_ia32cap_P[1] & (1 << (43 - 32))) /* XOP? */
| (OPENSSL_ia32cap_P[0] & (1 << 30))))) && /* "Intel CPU"? */
plen > (sha_off + iv) &&
(blocks = (plen - (sha_off + iv)) / SHA256_CBLOCK)) {
sha256_update(&sctx->md, in + iv, sha_off);
(void)aesni_cbc_sha256_enc(in, out, blocks, &ctx->ks,
ctx->base.iv,
&sctx->md, in + iv + sha_off);
blocks *= SHA256_CBLOCK;
aes_off += blocks;
sha_off += blocks;
sctx->md.Nh += blocks >> 29;
sctx->md.Nl += blocks <<= 3;
if (sctx->md.Nl < (unsigned int)blocks)
sctx->md.Nh++;
} else {
sha_off = 0;
}
sha_off += iv;
sha256_update(&sctx->md, in + sha_off, plen - sha_off);
if (plen != len) { /* "TLS" mode of operation */
if (in != out)
memcpy(out + aes_off, in + aes_off, plen - aes_off);
/* calculate HMAC and append it to payload */
SHA256_Final(out + plen, &sctx->md);
sctx->md = sctx->tail;
sha256_update(&sctx->md, out + plen, SHA256_DIGEST_LENGTH);
SHA256_Final(out + plen, &sctx->md);
/* pad the payload|hmac */
plen += SHA256_DIGEST_LENGTH;
for (l = len - plen - 1; plen < len; plen++)
out[plen] = l;
/* encrypt HMAC|padding at once */
aesni_cbc_encrypt(out + aes_off, out + aes_off, len - aes_off,
&ctx->ks, ctx->base.iv, 1);
} else {
aesni_cbc_encrypt(in + aes_off, out + aes_off, len - aes_off,
&ctx->ks, ctx->base.iv, 1);
}
} else {
union {
unsigned int u[SHA256_DIGEST_LENGTH / sizeof(unsigned int)];
unsigned char c[64 + SHA256_DIGEST_LENGTH];
} mac, *pmac;
/* arrange cache line alignment */
pmac = (void *)(((size_t)mac.c + 63) & ((size_t)0 - 64));
/* decrypt HMAC|padding at once */
aesni_cbc_encrypt(in, out, len, &ctx->ks,
ctx->base.iv, 0);
if (plen != NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
size_t inp_len, mask, j, i;
unsigned int res, maxpad, pad, bitlen;
int ret = 1;
union {
unsigned int u[SHA_LBLOCK];
unsigned char c[SHA256_CBLOCK];
} *data = (void *)sctx->md.data;
if ((ctx->aux.tls_aad[plen - 4] << 8 | ctx->aux.tls_aad[plen - 3])
>= TLS1_1_VERSION)
iv = AES_BLOCK_SIZE;
if (len < (iv + SHA256_DIGEST_LENGTH + 1))
return 0;
/* omit explicit iv */
out += iv;
len -= iv;
/* figure out payload length */
pad = out[len - 1];
maxpad = len - (SHA256_DIGEST_LENGTH + 1);
maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
maxpad &= 255;
mask = constant_time_ge(maxpad, pad);
ret &= mask;
/*
* If pad is invalid then we will fail the above test but we must
* continue anyway because we are in constant time code. However,
* we'll use the maxpad value instead of the supplied pad to make
* sure we perform well defined pointer arithmetic.
*/
pad = constant_time_select(mask, pad, maxpad);
inp_len = len - (SHA256_DIGEST_LENGTH + pad + 1);
ctx->aux.tls_aad[plen - 2] = inp_len >> 8;
ctx->aux.tls_aad[plen - 1] = inp_len;
/* calculate HMAC */
sctx->md = sctx->head;
sha256_update(&sctx->md, ctx->aux.tls_aad, plen);
/* code with lucky-13 fix */
len -= SHA256_DIGEST_LENGTH; /* amend mac */
if (len >= (256 + SHA256_CBLOCK)) {
j = (len - (256 + SHA256_CBLOCK)) & (0 - SHA256_CBLOCK);
j += SHA256_CBLOCK - sctx->md.num;
sha256_update(&sctx->md, out, j);
out += j;
len -= j;
inp_len -= j;
}
/* but pretend as if we hashed padded payload */
bitlen = sctx->md.Nl + (inp_len << 3); /* at most 18 bits */
# ifdef BSWAP4
bitlen = BSWAP4(bitlen);
# else
mac.c[0] = 0;
mac.c[1] = (unsigned char)(bitlen >> 16);
mac.c[2] = (unsigned char)(bitlen >> 8);
mac.c[3] = (unsigned char)bitlen;
bitlen = mac.u[0];
# endif /* BSWAP */
pmac->u[0] = 0;
pmac->u[1] = 0;
pmac->u[2] = 0;
pmac->u[3] = 0;
pmac->u[4] = 0;
pmac->u[5] = 0;
pmac->u[6] = 0;
pmac->u[7] = 0;
for (res = sctx->md.num, j = 0; j < len; j++) {
size_t c = out[j];
mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
c &= mask;
c |= 0x80 & ~mask & ~((inp_len - j) >> (sizeof(j) * 8 - 8));
data->c[res++] = (unsigned char)c;
if (res != SHA256_CBLOCK)
continue;
/* j is not incremented yet */
mask = 0 - ((inp_len + 7 - j) >> (sizeof(j) * 8 - 1));
data->u[SHA_LBLOCK - 1] |= bitlen & mask;
sha256_block_data_order(&sctx->md, data, 1);
mask &= 0 - ((j - inp_len - 72) >> (sizeof(j) * 8 - 1));
pmac->u[0] |= sctx->md.h[0] & mask;
pmac->u[1] |= sctx->md.h[1] & mask;
pmac->u[2] |= sctx->md.h[2] & mask;
pmac->u[3] |= sctx->md.h[3] & mask;
pmac->u[4] |= sctx->md.h[4] & mask;
pmac->u[5] |= sctx->md.h[5] & mask;
pmac->u[6] |= sctx->md.h[6] & mask;
pmac->u[7] |= sctx->md.h[7] & mask;
res = 0;
}
for (i = res; i < SHA256_CBLOCK; i++, j++)
data->c[i] = 0;
if (res > SHA256_CBLOCK - 8) {
mask = 0 - ((inp_len + 8 - j) >> (sizeof(j) * 8 - 1));
data->u[SHA_LBLOCK - 1] |= bitlen & mask;
sha256_block_data_order(&sctx->md, data, 1);
mask &= 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
pmac->u[0] |= sctx->md.h[0] & mask;
pmac->u[1] |= sctx->md.h[1] & mask;
pmac->u[2] |= sctx->md.h[2] & mask;
pmac->u[3] |= sctx->md.h[3] & mask;
pmac->u[4] |= sctx->md.h[4] & mask;
pmac->u[5] |= sctx->md.h[5] & mask;
pmac->u[6] |= sctx->md.h[6] & mask;
pmac->u[7] |= sctx->md.h[7] & mask;
memset(data, 0, SHA256_CBLOCK);
j += 64;
}
data->u[SHA_LBLOCK - 1] = bitlen;
sha256_block_data_order(&sctx->md, data, 1);
mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
pmac->u[0] |= sctx->md.h[0] & mask;
pmac->u[1] |= sctx->md.h[1] & mask;
pmac->u[2] |= sctx->md.h[2] & mask;
pmac->u[3] |= sctx->md.h[3] & mask;
pmac->u[4] |= sctx->md.h[4] & mask;
pmac->u[5] |= sctx->md.h[5] & mask;
pmac->u[6] |= sctx->md.h[6] & mask;
pmac->u[7] |= sctx->md.h[7] & mask;
# ifdef BSWAP4
pmac->u[0] = BSWAP4(pmac->u[0]);
pmac->u[1] = BSWAP4(pmac->u[1]);
pmac->u[2] = BSWAP4(pmac->u[2]);
pmac->u[3] = BSWAP4(pmac->u[3]);
pmac->u[4] = BSWAP4(pmac->u[4]);
pmac->u[5] = BSWAP4(pmac->u[5]);
pmac->u[6] = BSWAP4(pmac->u[6]);
pmac->u[7] = BSWAP4(pmac->u[7]);
# else
for (i = 0; i < 8; i++) {
res = pmac->u[i];
pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
pmac->c[4 * i + 3] = (unsigned char)res;
}
# endif /* BSWAP */
len += SHA256_DIGEST_LENGTH;
sctx->md = sctx->tail;
sha256_update(&sctx->md, pmac->c, SHA256_DIGEST_LENGTH);
SHA256_Final(pmac->c, &sctx->md);
/* verify HMAC */
out += inp_len;
len -= inp_len;
/* code containing lucky-13 fix */
{
unsigned char *p =
out + len - 1 - maxpad - SHA256_DIGEST_LENGTH;
size_t off = out - p;
unsigned int c, cmask;
maxpad += SHA256_DIGEST_LENGTH;
for (res = 0, i = 0, j = 0; j < maxpad; j++) {
c = p[j];
cmask =
((int)(j - off - SHA256_DIGEST_LENGTH)) >>
(sizeof(int) * 8 - 1);
res |= (c ^ pad) & ~cmask; /* ... and padding */
cmask &= ((int)(off - 1 - j)) >> (sizeof(int) * 8 - 1);
res |= (c ^ pmac->c[i]) & cmask;
i += 1 & cmask;
}
maxpad -= SHA256_DIGEST_LENGTH;
res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
ret &= (int)~res;
}
return ret;
} else {
sha256_update(&sctx->md, out, len);
}
}
return 1;
}
/* EVP_CTRL_AEAD_SET_MAC_KEY */
static void aesni_cbc_hmac_sha256_set_mac_key(void *vctx,
const unsigned char *mackey,
size_t len)
{
PROV_AES_HMAC_SHA256_CTX *ctx = (PROV_AES_HMAC_SHA256_CTX *)vctx;
unsigned int i;
unsigned char hmac_key[64];
memset(hmac_key, 0, sizeof(hmac_key));
if (len > sizeof(hmac_key)) {
SHA256_Init(&ctx->head);
sha256_update(&ctx->head, mackey, len);
SHA256_Final(hmac_key, &ctx->head);
} else {
memcpy(hmac_key, mackey, len);
}
for (i = 0; i < sizeof(hmac_key); i++)
hmac_key[i] ^= 0x36; /* ipad */
SHA256_Init(&ctx->head);
sha256_update(&ctx->head, hmac_key, sizeof(hmac_key));
for (i = 0; i < sizeof(hmac_key); i++)
hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
SHA256_Init(&ctx->tail);
sha256_update(&ctx->tail, hmac_key, sizeof(hmac_key));
OPENSSL_cleanse(hmac_key, sizeof(hmac_key));
}
/* EVP_CTRL_AEAD_TLS1_AAD */
static int aesni_cbc_hmac_sha256_set_tls1_aad(void *vctx,
unsigned char *aad_rec, int aad_len)
{
PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx;
PROV_AES_HMAC_SHA256_CTX *sctx = (PROV_AES_HMAC_SHA256_CTX *)vctx;
unsigned char *p = aad_rec;
unsigned int len;
if (aad_len != EVP_AEAD_TLS1_AAD_LEN)
return -1;
len = p[aad_len - 2] << 8 | p[aad_len - 1];
if (ctx->base.enc) {
ctx->payload_length = len;
if ((ctx->aux.tls_ver =
p[aad_len - 4] << 8 | p[aad_len - 3]) >= TLS1_1_VERSION) {
if (len < AES_BLOCK_SIZE)
return 0;
len -= AES_BLOCK_SIZE;
p[aad_len] = len >> 8;
p[aad_len - 1] = len;
}
sctx->md = sctx->head;
sha256_update(&sctx->md, p, aad_len);
ctx->tls_aad_pad = (int)(((len + SHA256_DIGEST_LENGTH +
AES_BLOCK_SIZE) & -AES_BLOCK_SIZE)
- len);
return 1;
} else {
memcpy(ctx->aux.tls_aad, p, aad_len);
ctx->payload_length = aad_len;
ctx->tls_aad_pad = SHA256_DIGEST_LENGTH;
return 1;
}
}
# if !defined(OPENSSL_NO_MULTIBLOCK)
/* EVP_CTRL_TLS1_1_MULTIBLOCK_MAX_BUFSIZE */
static int aesni_cbc_hmac_sha256_tls1_multiblock_max_bufsize(
void *vctx)
{
PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx;
OPENSSL_assert(ctx->multiblock_max_send_fragment != 0);
return (int)(5 + 16
+ (((int)ctx->multiblock_max_send_fragment + 32 + 16) & -16));
}
/* EVP_CTRL_TLS1_1_MULTIBLOCK_AAD */
static int aesni_cbc_hmac_sha256_tls1_multiblock_aad(
void *vctx, EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param)
{
PROV_AES_HMAC_SHA_CTX *ctx = (PROV_AES_HMAC_SHA_CTX *)vctx;
PROV_AES_HMAC_SHA256_CTX *sctx = (PROV_AES_HMAC_SHA256_CTX *)vctx;
unsigned int n4x = 1, x4;
unsigned int frag, last, packlen, inp_len;
inp_len = param->inp[11] << 8 | param->inp[12];
if (ctx->base.enc) {
if ((param->inp[9] << 8 | param->inp[10]) < TLS1_1_VERSION)
return -1;
if (inp_len) {
if (inp_len < 4096)
return 0; /* too short */
if (inp_len >= 8192 && OPENSSL_ia32cap_P[2] & (1 << 5))
n4x = 2; /* AVX2 */
} else if ((n4x = param->interleave / 4) && n4x <= 2)
inp_len = param->len;
else
return -1;
sctx->md = sctx->head;
sha256_update(&sctx->md, param->inp, 13);
x4 = 4 * n4x;
n4x += 1;
frag = inp_len >> n4x;
last = inp_len + frag - (frag << n4x);
if (last > frag && ((last + 13 + 9) % 64 < (x4 - 1))) {
frag++;
last -= x4 - 1;
}
packlen = 5 + 16 + ((frag + 32 + 16) & -16);
packlen = (packlen << n4x) - packlen;
packlen += 5 + 16 + ((last + 32 + 16) & -16);
param->interleave = x4;
/* The returned values used by get need to be stored */
ctx->multiblock_interleave = x4;
ctx->multiblock_aad_packlen = packlen;
return 1;
}
return -1; /* not yet */
}
/* EVP_CTRL_TLS1_1_MULTIBLOCK_ENCRYPT */
static int aesni_cbc_hmac_sha256_tls1_multiblock_encrypt(
void *ctx, EVP_CTRL_TLS1_1_MULTIBLOCK_PARAM *param)
{
return (int)tls1_multi_block_encrypt(ctx, param->out,
param->inp, param->len,
param->interleave / 4);
}
# endif
static const PROV_CIPHER_HW_AES_HMAC_SHA cipher_hw_aes_hmac_sha256 = {
{
aesni_cbc_hmac_sha256_init_key,
aesni_cbc_hmac_sha256_cipher
},
aesni_cbc_hmac_sha256_set_mac_key,
aesni_cbc_hmac_sha256_set_tls1_aad,
# if !defined(OPENSSL_NO_MULTIBLOCK)
aesni_cbc_hmac_sha256_tls1_multiblock_max_bufsize,
aesni_cbc_hmac_sha256_tls1_multiblock_aad,
aesni_cbc_hmac_sha256_tls1_multiblock_encrypt
# endif
};
const PROV_CIPHER_HW_AES_HMAC_SHA *PROV_CIPHER_HW_aes_cbc_hmac_sha256(void)
{
return &cipher_hw_aes_hmac_sha256;
}
#endif /* !defined(AES_CBC_HMAC_SHA_CAPABLE) || !defined(AESNI_CAPABLE) */
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