506 lines
13 KiB
C
506 lines
13 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
* AES GCM routines supporting the Power 7+ Nest Accelerators driver
|
||
|
|
*
|
||
|
|
* Copyright (C) 2012 International Business Machines Inc.
|
||
|
|
*
|
||
|
|
* Author: Kent Yoder <yoder1@us.ibm.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <crypto/internal/aead.h>
|
||
|
|
#include <crypto/aes.h>
|
||
|
|
#include <crypto/algapi.h>
|
||
|
|
#include <crypto/gcm.h>
|
||
|
|
#include <crypto/scatterwalk.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <asm/vio.h>
|
||
|
|
|
||
|
|
#include "nx_csbcpb.h"
|
||
|
|
#include "nx.h"
|
||
|
|
|
||
|
|
|
||
|
|
static int gcm_aes_nx_set_key(struct crypto_aead *tfm,
|
||
|
|
const u8 *in_key,
|
||
|
|
unsigned int key_len)
|
||
|
|
{
|
||
|
|
struct nx_crypto_ctx *nx_ctx = crypto_aead_ctx(tfm);
|
||
|
|
struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
|
||
|
|
struct nx_csbcpb *csbcpb_aead = nx_ctx->csbcpb_aead;
|
||
|
|
|
||
|
|
nx_ctx_init(nx_ctx, HCOP_FC_AES);
|
||
|
|
|
||
|
|
switch (key_len) {
|
||
|
|
case AES_KEYSIZE_128:
|
||
|
|
NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_128);
|
||
|
|
NX_CPB_SET_KEY_SIZE(csbcpb_aead, NX_KS_AES_128);
|
||
|
|
nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_128];
|
||
|
|
break;
|
||
|
|
case AES_KEYSIZE_192:
|
||
|
|
NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_192);
|
||
|
|
NX_CPB_SET_KEY_SIZE(csbcpb_aead, NX_KS_AES_192);
|
||
|
|
nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_192];
|
||
|
|
break;
|
||
|
|
case AES_KEYSIZE_256:
|
||
|
|
NX_CPB_SET_KEY_SIZE(csbcpb, NX_KS_AES_256);
|
||
|
|
NX_CPB_SET_KEY_SIZE(csbcpb_aead, NX_KS_AES_256);
|
||
|
|
nx_ctx->ap = &nx_ctx->props[NX_PROPS_AES_256];
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
csbcpb->cpb.hdr.mode = NX_MODE_AES_GCM;
|
||
|
|
memcpy(csbcpb->cpb.aes_gcm.key, in_key, key_len);
|
||
|
|
|
||
|
|
csbcpb_aead->cpb.hdr.mode = NX_MODE_AES_GCA;
|
||
|
|
memcpy(csbcpb_aead->cpb.aes_gca.key, in_key, key_len);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gcm4106_aes_nx_set_key(struct crypto_aead *tfm,
|
||
|
|
const u8 *in_key,
|
||
|
|
unsigned int key_len)
|
||
|
|
{
|
||
|
|
struct nx_crypto_ctx *nx_ctx = crypto_aead_ctx(tfm);
|
||
|
|
char *nonce = nx_ctx->priv.gcm.nonce;
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
if (key_len < 4)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
key_len -= 4;
|
||
|
|
|
||
|
|
rc = gcm_aes_nx_set_key(tfm, in_key, key_len);
|
||
|
|
if (rc)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
memcpy(nonce, in_key + key_len, 4);
|
||
|
|
out:
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gcm4106_aes_nx_setauthsize(struct crypto_aead *tfm,
|
||
|
|
unsigned int authsize)
|
||
|
|
{
|
||
|
|
switch (authsize) {
|
||
|
|
case 8:
|
||
|
|
case 12:
|
||
|
|
case 16:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int nx_gca(struct nx_crypto_ctx *nx_ctx,
|
||
|
|
struct aead_request *req,
|
||
|
|
u8 *out,
|
||
|
|
unsigned int assoclen)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
struct nx_csbcpb *csbcpb_aead = nx_ctx->csbcpb_aead;
|
||
|
|
struct scatter_walk walk;
|
||
|
|
struct nx_sg *nx_sg = nx_ctx->in_sg;
|
||
|
|
unsigned int nbytes = assoclen;
|
||
|
|
unsigned int processed = 0, to_process;
|
||
|
|
unsigned int max_sg_len;
|
||
|
|
|
||
|
|
if (nbytes <= AES_BLOCK_SIZE) {
|
||
|
|
scatterwalk_start(&walk, req->src);
|
||
|
|
scatterwalk_copychunks(out, &walk, nbytes, SCATTERWALK_FROM_SG);
|
||
|
|
scatterwalk_done(&walk, SCATTERWALK_FROM_SG, 0);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
NX_CPB_FDM(csbcpb_aead) &= ~NX_FDM_CONTINUATION;
|
||
|
|
|
||
|
|
/* page_limit: number of sg entries that fit on one page */
|
||
|
|
max_sg_len = min_t(u64, nx_driver.of.max_sg_len/sizeof(struct nx_sg),
|
||
|
|
nx_ctx->ap->sglen);
|
||
|
|
max_sg_len = min_t(u64, max_sg_len,
|
||
|
|
nx_ctx->ap->databytelen/NX_PAGE_SIZE);
|
||
|
|
|
||
|
|
do {
|
||
|
|
/*
|
||
|
|
* to_process: the data chunk to process in this update.
|
||
|
|
* This value is bound by sg list limits.
|
||
|
|
*/
|
||
|
|
to_process = min_t(u64, nbytes - processed,
|
||
|
|
nx_ctx->ap->databytelen);
|
||
|
|
to_process = min_t(u64, to_process,
|
||
|
|
NX_PAGE_SIZE * (max_sg_len - 1));
|
||
|
|
|
||
|
|
nx_sg = nx_walk_and_build(nx_ctx->in_sg, max_sg_len,
|
||
|
|
req->src, processed, &to_process);
|
||
|
|
|
||
|
|
if ((to_process + processed) < nbytes)
|
||
|
|
NX_CPB_FDM(csbcpb_aead) |= NX_FDM_INTERMEDIATE;
|
||
|
|
else
|
||
|
|
NX_CPB_FDM(csbcpb_aead) &= ~NX_FDM_INTERMEDIATE;
|
||
|
|
|
||
|
|
nx_ctx->op_aead.inlen = (nx_ctx->in_sg - nx_sg)
|
||
|
|
* sizeof(struct nx_sg);
|
||
|
|
|
||
|
|
rc = nx_hcall_sync(nx_ctx, &nx_ctx->op_aead,
|
||
|
|
req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
|
||
|
|
if (rc)
|
||
|
|
return rc;
|
||
|
|
|
||
|
|
memcpy(csbcpb_aead->cpb.aes_gca.in_pat,
|
||
|
|
csbcpb_aead->cpb.aes_gca.out_pat,
|
||
|
|
AES_BLOCK_SIZE);
|
||
|
|
NX_CPB_FDM(csbcpb_aead) |= NX_FDM_CONTINUATION;
|
||
|
|
|
||
|
|
atomic_inc(&(nx_ctx->stats->aes_ops));
|
||
|
|
atomic64_add(assoclen, &(nx_ctx->stats->aes_bytes));
|
||
|
|
|
||
|
|
processed += to_process;
|
||
|
|
} while (processed < nbytes);
|
||
|
|
|
||
|
|
memcpy(out, csbcpb_aead->cpb.aes_gca.out_pat, AES_BLOCK_SIZE);
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gmac(struct aead_request *req, const u8 *iv, unsigned int assoclen)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
struct nx_crypto_ctx *nx_ctx =
|
||
|
|
crypto_aead_ctx(crypto_aead_reqtfm(req));
|
||
|
|
struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
|
||
|
|
struct nx_sg *nx_sg;
|
||
|
|
unsigned int nbytes = assoclen;
|
||
|
|
unsigned int processed = 0, to_process;
|
||
|
|
unsigned int max_sg_len;
|
||
|
|
|
||
|
|
/* Set GMAC mode */
|
||
|
|
csbcpb->cpb.hdr.mode = NX_MODE_AES_GMAC;
|
||
|
|
|
||
|
|
NX_CPB_FDM(csbcpb) &= ~NX_FDM_CONTINUATION;
|
||
|
|
|
||
|
|
/* page_limit: number of sg entries that fit on one page */
|
||
|
|
max_sg_len = min_t(u64, nx_driver.of.max_sg_len/sizeof(struct nx_sg),
|
||
|
|
nx_ctx->ap->sglen);
|
||
|
|
max_sg_len = min_t(u64, max_sg_len,
|
||
|
|
nx_ctx->ap->databytelen/NX_PAGE_SIZE);
|
||
|
|
|
||
|
|
/* Copy IV */
|
||
|
|
memcpy(csbcpb->cpb.aes_gcm.iv_or_cnt, iv, AES_BLOCK_SIZE);
|
||
|
|
|
||
|
|
do {
|
||
|
|
/*
|
||
|
|
* to_process: the data chunk to process in this update.
|
||
|
|
* This value is bound by sg list limits.
|
||
|
|
*/
|
||
|
|
to_process = min_t(u64, nbytes - processed,
|
||
|
|
nx_ctx->ap->databytelen);
|
||
|
|
to_process = min_t(u64, to_process,
|
||
|
|
NX_PAGE_SIZE * (max_sg_len - 1));
|
||
|
|
|
||
|
|
nx_sg = nx_walk_and_build(nx_ctx->in_sg, max_sg_len,
|
||
|
|
req->src, processed, &to_process);
|
||
|
|
|
||
|
|
if ((to_process + processed) < nbytes)
|
||
|
|
NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE;
|
||
|
|
else
|
||
|
|
NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;
|
||
|
|
|
||
|
|
nx_ctx->op.inlen = (nx_ctx->in_sg - nx_sg)
|
||
|
|
* sizeof(struct nx_sg);
|
||
|
|
|
||
|
|
csbcpb->cpb.aes_gcm.bit_length_data = 0;
|
||
|
|
csbcpb->cpb.aes_gcm.bit_length_aad = 8 * nbytes;
|
||
|
|
|
||
|
|
rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
|
||
|
|
req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
|
||
|
|
if (rc)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
memcpy(csbcpb->cpb.aes_gcm.in_pat_or_aad,
|
||
|
|
csbcpb->cpb.aes_gcm.out_pat_or_mac, AES_BLOCK_SIZE);
|
||
|
|
memcpy(csbcpb->cpb.aes_gcm.in_s0,
|
||
|
|
csbcpb->cpb.aes_gcm.out_s0, AES_BLOCK_SIZE);
|
||
|
|
|
||
|
|
NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
|
||
|
|
|
||
|
|
atomic_inc(&(nx_ctx->stats->aes_ops));
|
||
|
|
atomic64_add(assoclen, &(nx_ctx->stats->aes_bytes));
|
||
|
|
|
||
|
|
processed += to_process;
|
||
|
|
} while (processed < nbytes);
|
||
|
|
|
||
|
|
out:
|
||
|
|
/* Restore GCM mode */
|
||
|
|
csbcpb->cpb.hdr.mode = NX_MODE_AES_GCM;
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gcm_empty(struct aead_request *req, const u8 *iv, int enc)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
struct nx_crypto_ctx *nx_ctx =
|
||
|
|
crypto_aead_ctx(crypto_aead_reqtfm(req));
|
||
|
|
struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
|
||
|
|
char out[AES_BLOCK_SIZE];
|
||
|
|
struct nx_sg *in_sg, *out_sg;
|
||
|
|
int len;
|
||
|
|
|
||
|
|
/* For scenarios where the input message is zero length, AES CTR mode
|
||
|
|
* may be used. Set the source data to be a single block (16B) of all
|
||
|
|
* zeros, and set the input IV value to be the same as the GMAC IV
|
||
|
|
* value. - nx_wb 4.8.1.3 */
|
||
|
|
|
||
|
|
/* Change to ECB mode */
|
||
|
|
csbcpb->cpb.hdr.mode = NX_MODE_AES_ECB;
|
||
|
|
memcpy(csbcpb->cpb.aes_ecb.key, csbcpb->cpb.aes_gcm.key,
|
||
|
|
sizeof(csbcpb->cpb.aes_ecb.key));
|
||
|
|
if (enc)
|
||
|
|
NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT;
|
||
|
|
else
|
||
|
|
NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT;
|
||
|
|
|
||
|
|
len = AES_BLOCK_SIZE;
|
||
|
|
|
||
|
|
/* Encrypt the counter/IV */
|
||
|
|
in_sg = nx_build_sg_list(nx_ctx->in_sg, (u8 *) iv,
|
||
|
|
&len, nx_ctx->ap->sglen);
|
||
|
|
|
||
|
|
if (len != AES_BLOCK_SIZE)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
len = sizeof(out);
|
||
|
|
out_sg = nx_build_sg_list(nx_ctx->out_sg, (u8 *) out, &len,
|
||
|
|
nx_ctx->ap->sglen);
|
||
|
|
|
||
|
|
if (len != sizeof(out))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
nx_ctx->op.inlen = (nx_ctx->in_sg - in_sg) * sizeof(struct nx_sg);
|
||
|
|
nx_ctx->op.outlen = (nx_ctx->out_sg - out_sg) * sizeof(struct nx_sg);
|
||
|
|
|
||
|
|
rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
|
||
|
|
req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
|
||
|
|
if (rc)
|
||
|
|
goto out;
|
||
|
|
atomic_inc(&(nx_ctx->stats->aes_ops));
|
||
|
|
|
||
|
|
/* Copy out the auth tag */
|
||
|
|
memcpy(csbcpb->cpb.aes_gcm.out_pat_or_mac, out,
|
||
|
|
crypto_aead_authsize(crypto_aead_reqtfm(req)));
|
||
|
|
out:
|
||
|
|
/* Restore XCBC mode */
|
||
|
|
csbcpb->cpb.hdr.mode = NX_MODE_AES_GCM;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ECB key uses the same region that GCM AAD and counter, so it's safe
|
||
|
|
* to just fill it with zeroes.
|
||
|
|
*/
|
||
|
|
memset(csbcpb->cpb.aes_ecb.key, 0, sizeof(csbcpb->cpb.aes_ecb.key));
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gcm_aes_nx_crypt(struct aead_request *req, int enc,
|
||
|
|
unsigned int assoclen)
|
||
|
|
{
|
||
|
|
struct nx_crypto_ctx *nx_ctx =
|
||
|
|
crypto_aead_ctx(crypto_aead_reqtfm(req));
|
||
|
|
struct nx_gcm_rctx *rctx = aead_request_ctx(req);
|
||
|
|
struct nx_csbcpb *csbcpb = nx_ctx->csbcpb;
|
||
|
|
unsigned int nbytes = req->cryptlen;
|
||
|
|
unsigned int processed = 0, to_process;
|
||
|
|
unsigned long irq_flags;
|
||
|
|
int rc = -EINVAL;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&nx_ctx->lock, irq_flags);
|
||
|
|
|
||
|
|
/* initialize the counter */
|
||
|
|
*(u32 *)&rctx->iv[NX_GCM_CTR_OFFSET] = 1;
|
||
|
|
|
||
|
|
if (nbytes == 0) {
|
||
|
|
if (assoclen == 0)
|
||
|
|
rc = gcm_empty(req, rctx->iv, enc);
|
||
|
|
else
|
||
|
|
rc = gmac(req, rctx->iv, assoclen);
|
||
|
|
if (rc)
|
||
|
|
goto out;
|
||
|
|
else
|
||
|
|
goto mac;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Process associated data */
|
||
|
|
csbcpb->cpb.aes_gcm.bit_length_aad = assoclen * 8;
|
||
|
|
if (assoclen) {
|
||
|
|
rc = nx_gca(nx_ctx, req, csbcpb->cpb.aes_gcm.in_pat_or_aad,
|
||
|
|
assoclen);
|
||
|
|
if (rc)
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Set flags for encryption */
|
||
|
|
NX_CPB_FDM(csbcpb) &= ~NX_FDM_CONTINUATION;
|
||
|
|
if (enc) {
|
||
|
|
NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT;
|
||
|
|
} else {
|
||
|
|
NX_CPB_FDM(csbcpb) &= ~NX_FDM_ENDE_ENCRYPT;
|
||
|
|
nbytes -= crypto_aead_authsize(crypto_aead_reqtfm(req));
|
||
|
|
}
|
||
|
|
|
||
|
|
do {
|
||
|
|
to_process = nbytes - processed;
|
||
|
|
|
||
|
|
csbcpb->cpb.aes_gcm.bit_length_data = nbytes * 8;
|
||
|
|
rc = nx_build_sg_lists(nx_ctx, rctx->iv, req->dst,
|
||
|
|
req->src, &to_process,
|
||
|
|
processed + req->assoclen,
|
||
|
|
csbcpb->cpb.aes_gcm.iv_or_cnt);
|
||
|
|
|
||
|
|
if (rc)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
if ((to_process + processed) < nbytes)
|
||
|
|
NX_CPB_FDM(csbcpb) |= NX_FDM_INTERMEDIATE;
|
||
|
|
else
|
||
|
|
NX_CPB_FDM(csbcpb) &= ~NX_FDM_INTERMEDIATE;
|
||
|
|
|
||
|
|
|
||
|
|
rc = nx_hcall_sync(nx_ctx, &nx_ctx->op,
|
||
|
|
req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
|
||
|
|
if (rc)
|
||
|
|
goto out;
|
||
|
|
|
||
|
|
memcpy(rctx->iv, csbcpb->cpb.aes_gcm.out_cnt, AES_BLOCK_SIZE);
|
||
|
|
memcpy(csbcpb->cpb.aes_gcm.in_pat_or_aad,
|
||
|
|
csbcpb->cpb.aes_gcm.out_pat_or_mac, AES_BLOCK_SIZE);
|
||
|
|
memcpy(csbcpb->cpb.aes_gcm.in_s0,
|
||
|
|
csbcpb->cpb.aes_gcm.out_s0, AES_BLOCK_SIZE);
|
||
|
|
|
||
|
|
NX_CPB_FDM(csbcpb) |= NX_FDM_CONTINUATION;
|
||
|
|
|
||
|
|
atomic_inc(&(nx_ctx->stats->aes_ops));
|
||
|
|
atomic64_add(be32_to_cpu(csbcpb->csb.processed_byte_count),
|
||
|
|
&(nx_ctx->stats->aes_bytes));
|
||
|
|
|
||
|
|
processed += to_process;
|
||
|
|
} while (processed < nbytes);
|
||
|
|
|
||
|
|
mac:
|
||
|
|
if (enc) {
|
||
|
|
/* copy out the auth tag */
|
||
|
|
scatterwalk_map_and_copy(
|
||
|
|
csbcpb->cpb.aes_gcm.out_pat_or_mac,
|
||
|
|
req->dst, req->assoclen + nbytes,
|
||
|
|
crypto_aead_authsize(crypto_aead_reqtfm(req)),
|
||
|
|
SCATTERWALK_TO_SG);
|
||
|
|
} else {
|
||
|
|
u8 *itag = nx_ctx->priv.gcm.iauth_tag;
|
||
|
|
u8 *otag = csbcpb->cpb.aes_gcm.out_pat_or_mac;
|
||
|
|
|
||
|
|
scatterwalk_map_and_copy(
|
||
|
|
itag, req->src, req->assoclen + nbytes,
|
||
|
|
crypto_aead_authsize(crypto_aead_reqtfm(req)),
|
||
|
|
SCATTERWALK_FROM_SG);
|
||
|
|
rc = crypto_memneq(itag, otag,
|
||
|
|
crypto_aead_authsize(crypto_aead_reqtfm(req))) ?
|
||
|
|
-EBADMSG : 0;
|
||
|
|
}
|
||
|
|
out:
|
||
|
|
spin_unlock_irqrestore(&nx_ctx->lock, irq_flags);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gcm_aes_nx_encrypt(struct aead_request *req)
|
||
|
|
{
|
||
|
|
struct nx_gcm_rctx *rctx = aead_request_ctx(req);
|
||
|
|
char *iv = rctx->iv;
|
||
|
|
|
||
|
|
memcpy(iv, req->iv, GCM_AES_IV_SIZE);
|
||
|
|
|
||
|
|
return gcm_aes_nx_crypt(req, 1, req->assoclen);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gcm_aes_nx_decrypt(struct aead_request *req)
|
||
|
|
{
|
||
|
|
struct nx_gcm_rctx *rctx = aead_request_ctx(req);
|
||
|
|
char *iv = rctx->iv;
|
||
|
|
|
||
|
|
memcpy(iv, req->iv, GCM_AES_IV_SIZE);
|
||
|
|
|
||
|
|
return gcm_aes_nx_crypt(req, 0, req->assoclen);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gcm4106_aes_nx_encrypt(struct aead_request *req)
|
||
|
|
{
|
||
|
|
struct nx_crypto_ctx *nx_ctx =
|
||
|
|
crypto_aead_ctx(crypto_aead_reqtfm(req));
|
||
|
|
struct nx_gcm_rctx *rctx = aead_request_ctx(req);
|
||
|
|
char *iv = rctx->iv;
|
||
|
|
char *nonce = nx_ctx->priv.gcm.nonce;
|
||
|
|
|
||
|
|
memcpy(iv, nonce, NX_GCM4106_NONCE_LEN);
|
||
|
|
memcpy(iv + NX_GCM4106_NONCE_LEN, req->iv, 8);
|
||
|
|
|
||
|
|
if (req->assoclen < 8)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
return gcm_aes_nx_crypt(req, 1, req->assoclen - 8);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int gcm4106_aes_nx_decrypt(struct aead_request *req)
|
||
|
|
{
|
||
|
|
struct nx_crypto_ctx *nx_ctx =
|
||
|
|
crypto_aead_ctx(crypto_aead_reqtfm(req));
|
||
|
|
struct nx_gcm_rctx *rctx = aead_request_ctx(req);
|
||
|
|
char *iv = rctx->iv;
|
||
|
|
char *nonce = nx_ctx->priv.gcm.nonce;
|
||
|
|
|
||
|
|
memcpy(iv, nonce, NX_GCM4106_NONCE_LEN);
|
||
|
|
memcpy(iv + NX_GCM4106_NONCE_LEN, req->iv, 8);
|
||
|
|
|
||
|
|
if (req->assoclen < 8)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
return gcm_aes_nx_crypt(req, 0, req->assoclen - 8);
|
||
|
|
}
|
||
|
|
|
||
|
|
struct aead_alg nx_gcm_aes_alg = {
|
||
|
|
.base = {
|
||
|
|
.cra_name = "gcm(aes)",
|
||
|
|
.cra_driver_name = "gcm-aes-nx",
|
||
|
|
.cra_priority = 300,
|
||
|
|
.cra_blocksize = 1,
|
||
|
|
.cra_ctxsize = sizeof(struct nx_crypto_ctx),
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
},
|
||
|
|
.init = nx_crypto_ctx_aes_gcm_init,
|
||
|
|
.exit = nx_crypto_ctx_aead_exit,
|
||
|
|
.ivsize = GCM_AES_IV_SIZE,
|
||
|
|
.maxauthsize = AES_BLOCK_SIZE,
|
||
|
|
.setkey = gcm_aes_nx_set_key,
|
||
|
|
.encrypt = gcm_aes_nx_encrypt,
|
||
|
|
.decrypt = gcm_aes_nx_decrypt,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct aead_alg nx_gcm4106_aes_alg = {
|
||
|
|
.base = {
|
||
|
|
.cra_name = "rfc4106(gcm(aes))",
|
||
|
|
.cra_driver_name = "rfc4106-gcm-aes-nx",
|
||
|
|
.cra_priority = 300,
|
||
|
|
.cra_blocksize = 1,
|
||
|
|
.cra_ctxsize = sizeof(struct nx_crypto_ctx),
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
},
|
||
|
|
.init = nx_crypto_ctx_aes_gcm_init,
|
||
|
|
.exit = nx_crypto_ctx_aead_exit,
|
||
|
|
.ivsize = GCM_RFC4106_IV_SIZE,
|
||
|
|
.maxauthsize = AES_BLOCK_SIZE,
|
||
|
|
.setkey = gcm4106_aes_nx_set_key,
|
||
|
|
.setauthsize = gcm4106_aes_nx_setauthsize,
|
||
|
|
.encrypt = gcm4106_aes_nx_encrypt,
|
||
|
|
.decrypt = gcm4106_aes_nx_decrypt,
|
||
|
|
};
|