crypto: ccp - Enable support for AES GCM on v5 CCPs
A version 5 device provides the primitive commands required for AES GCM. This patch adds support for en/decryption. Signed-off-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gary R Hook
Herbert Xu
Родитель
990672d485
Коммит
36cf515b9b
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@ -12,5 +12,6 @@ ccp-crypto-objs := ccp-crypto-main.o \
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ccp-crypto-aes.o \
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ccp-crypto-aes-cmac.o \
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ccp-crypto-aes-xts.o \
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ccp-crypto-aes-galois.o \
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ccp-crypto-des3.o \
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ccp-crypto-sha.o
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@ -0,0 +1,252 @@
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/*
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* AMD Cryptographic Coprocessor (CCP) AES GCM crypto API support
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*
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* Copyright (C) 2016 Advanced Micro Devices, Inc.
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*
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* Author: Gary R Hook <gary.hook@amd.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/delay.h>
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#include <linux/scatterlist.h>
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#include <linux/crypto.h>
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#include <crypto/internal/aead.h>
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#include <crypto/algapi.h>
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#include <crypto/aes.h>
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#include <crypto/ctr.h>
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#include <crypto/scatterwalk.h>
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#include <linux/delay.h>
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#include "ccp-crypto.h"
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#define AES_GCM_IVSIZE 12
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static int ccp_aes_gcm_complete(struct crypto_async_request *async_req, int ret)
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{
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return ret;
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}
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static int ccp_aes_gcm_setkey(struct crypto_aead *tfm, const u8 *key,
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unsigned int key_len)
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{
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struct ccp_ctx *ctx = crypto_aead_ctx(tfm);
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switch (key_len) {
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case AES_KEYSIZE_128:
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ctx->u.aes.type = CCP_AES_TYPE_128;
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break;
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case AES_KEYSIZE_192:
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ctx->u.aes.type = CCP_AES_TYPE_192;
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break;
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case AES_KEYSIZE_256:
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ctx->u.aes.type = CCP_AES_TYPE_256;
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break;
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default:
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crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
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return -EINVAL;
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}
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ctx->u.aes.mode = CCP_AES_MODE_GCM;
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ctx->u.aes.key_len = key_len;
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memcpy(ctx->u.aes.key, key, key_len);
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sg_init_one(&ctx->u.aes.key_sg, ctx->u.aes.key, key_len);
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return 0;
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}
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static int ccp_aes_gcm_setauthsize(struct crypto_aead *tfm,
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unsigned int authsize)
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{
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return 0;
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}
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static int ccp_aes_gcm_crypt(struct aead_request *req, bool encrypt)
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{
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struct crypto_aead *tfm = crypto_aead_reqtfm(req);
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struct ccp_ctx *ctx = crypto_aead_ctx(tfm);
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struct ccp_aes_req_ctx *rctx = aead_request_ctx(req);
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struct scatterlist *iv_sg = NULL;
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unsigned int iv_len = 0;
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int i;
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int ret = 0;
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if (!ctx->u.aes.key_len)
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return -EINVAL;
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if (ctx->u.aes.mode != CCP_AES_MODE_GCM)
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return -EINVAL;
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if (!req->iv)
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return -EINVAL;
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/*
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* 5 parts:
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* plaintext/ciphertext input
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* AAD
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* key
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* IV
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* Destination+tag buffer
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*/
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/* Prepare the IV: 12 bytes + an integer (counter) */
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memcpy(rctx->iv, req->iv, AES_GCM_IVSIZE);
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for (i = 0; i < 3; i++)
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rctx->iv[i + AES_GCM_IVSIZE] = 0;
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rctx->iv[AES_BLOCK_SIZE - 1] = 1;
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/* Set up a scatterlist for the IV */
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iv_sg = &rctx->iv_sg;
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iv_len = AES_BLOCK_SIZE;
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sg_init_one(iv_sg, rctx->iv, iv_len);
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/* The AAD + plaintext are concatenated in the src buffer */
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memset(&rctx->cmd, 0, sizeof(rctx->cmd));
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INIT_LIST_HEAD(&rctx->cmd.entry);
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rctx->cmd.engine = CCP_ENGINE_AES;
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rctx->cmd.u.aes.type = ctx->u.aes.type;
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rctx->cmd.u.aes.mode = ctx->u.aes.mode;
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rctx->cmd.u.aes.action = encrypt;
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rctx->cmd.u.aes.key = &ctx->u.aes.key_sg;
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rctx->cmd.u.aes.key_len = ctx->u.aes.key_len;
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rctx->cmd.u.aes.iv = iv_sg;
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rctx->cmd.u.aes.iv_len = iv_len;
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rctx->cmd.u.aes.src = req->src;
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rctx->cmd.u.aes.src_len = req->cryptlen;
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rctx->cmd.u.aes.aad_len = req->assoclen;
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/* The cipher text + the tag are in the dst buffer */
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rctx->cmd.u.aes.dst = req->dst;
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ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
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return ret;
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}
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static int ccp_aes_gcm_encrypt(struct aead_request *req)
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{
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return ccp_aes_gcm_crypt(req, CCP_AES_ACTION_ENCRYPT);
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}
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static int ccp_aes_gcm_decrypt(struct aead_request *req)
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{
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return ccp_aes_gcm_crypt(req, CCP_AES_ACTION_DECRYPT);
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}
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static int ccp_aes_gcm_cra_init(struct crypto_aead *tfm)
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{
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struct ccp_ctx *ctx = crypto_aead_ctx(tfm);
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ctx->complete = ccp_aes_gcm_complete;
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ctx->u.aes.key_len = 0;
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crypto_aead_set_reqsize(tfm, sizeof(struct ccp_aes_req_ctx));
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return 0;
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}
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static void ccp_aes_gcm_cra_exit(struct crypto_tfm *tfm)
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{
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}
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static struct aead_alg ccp_aes_gcm_defaults = {
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.setkey = ccp_aes_gcm_setkey,
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.setauthsize = ccp_aes_gcm_setauthsize,
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.encrypt = ccp_aes_gcm_encrypt,
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.decrypt = ccp_aes_gcm_decrypt,
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.init = ccp_aes_gcm_cra_init,
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.ivsize = AES_GCM_IVSIZE,
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.maxauthsize = AES_BLOCK_SIZE,
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.base = {
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.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
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CRYPTO_ALG_ASYNC |
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CRYPTO_ALG_KERN_DRIVER_ONLY |
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CRYPTO_ALG_NEED_FALLBACK,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct ccp_ctx),
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.cra_priority = CCP_CRA_PRIORITY,
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.cra_type = &crypto_ablkcipher_type,
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.cra_exit = ccp_aes_gcm_cra_exit,
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.cra_module = THIS_MODULE,
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},
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};
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struct ccp_aes_aead_def {
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enum ccp_aes_mode mode;
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unsigned int version;
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const char *name;
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const char *driver_name;
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unsigned int blocksize;
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unsigned int ivsize;
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struct aead_alg *alg_defaults;
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};
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static struct ccp_aes_aead_def aes_aead_algs[] = {
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{
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.mode = CCP_AES_MODE_GHASH,
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.version = CCP_VERSION(5, 0),
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.name = "gcm(aes)",
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.driver_name = "gcm-aes-ccp",
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.blocksize = 1,
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.ivsize = AES_BLOCK_SIZE,
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.alg_defaults = &ccp_aes_gcm_defaults,
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},
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};
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static int ccp_register_aes_aead(struct list_head *head,
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const struct ccp_aes_aead_def *def)
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{
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struct ccp_crypto_aead *ccp_aead;
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struct aead_alg *alg;
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int ret;
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ccp_aead = kzalloc(sizeof(*ccp_aead), GFP_KERNEL);
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if (!ccp_aead)
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return -ENOMEM;
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INIT_LIST_HEAD(&ccp_aead->entry);
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ccp_aead->mode = def->mode;
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/* Copy the defaults and override as necessary */
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alg = &ccp_aead->alg;
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*alg = *def->alg_defaults;
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snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
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snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
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def->driver_name);
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alg->base.cra_blocksize = def->blocksize;
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alg->base.cra_ablkcipher.ivsize = def->ivsize;
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ret = crypto_register_aead(alg);
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if (ret) {
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pr_err("%s ablkcipher algorithm registration error (%d)\n",
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alg->base.cra_name, ret);
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kfree(ccp_aead);
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return ret;
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}
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list_add(&ccp_aead->entry, head);
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return 0;
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}
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int ccp_register_aes_aeads(struct list_head *head)
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{
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int i, ret;
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unsigned int ccpversion = ccp_version();
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for (i = 0; i < ARRAY_SIZE(aes_aead_algs); i++) {
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if (aes_aead_algs[i].version > ccpversion)
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continue;
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ret = ccp_register_aes_aead(head, &aes_aead_algs[i]);
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if (ret)
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return ret;
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}
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return 0;
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}
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@ -40,6 +40,7 @@ MODULE_PARM_DESC(des3_disable, "Disable use of 3DES - any non-zero value");
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/* List heads for the supported algorithms */
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static LIST_HEAD(hash_algs);
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static LIST_HEAD(cipher_algs);
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static LIST_HEAD(aead_algs);
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/* For any tfm, requests for that tfm must be returned on the order
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* received. With multiple queues available, the CCP can process more
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@ -339,6 +340,10 @@ static int ccp_register_algs(void)
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ret = ccp_register_aes_xts_algs(&cipher_algs);
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if (ret)
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return ret;
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ret = ccp_register_aes_aeads(&aead_algs);
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if (ret)
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return ret;
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}
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if (!des3_disable) {
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@ -360,6 +365,7 @@ static void ccp_unregister_algs(void)
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{
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struct ccp_crypto_ahash_alg *ahash_alg, *ahash_tmp;
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struct ccp_crypto_ablkcipher_alg *ablk_alg, *ablk_tmp;
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struct ccp_crypto_aead *aead_alg, *aead_tmp;
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list_for_each_entry_safe(ahash_alg, ahash_tmp, &hash_algs, entry) {
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crypto_unregister_ahash(&ahash_alg->alg);
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@ -372,6 +378,12 @@ static void ccp_unregister_algs(void)
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list_del(&ablk_alg->entry);
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kfree(ablk_alg);
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}
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list_for_each_entry_safe(aead_alg, aead_tmp, &aead_algs, entry) {
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crypto_unregister_aead(&aead_alg->alg);
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list_del(&aead_alg->entry);
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kfree(aead_alg);
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}
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}
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static int ccp_crypto_init(void)
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@ -19,6 +19,8 @@
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#include <linux/ccp.h>
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#include <crypto/algapi.h>
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#include <crypto/aes.h>
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#include <crypto/internal/aead.h>
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#include <crypto/aead.h>
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#include <crypto/ctr.h>
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#include <crypto/hash.h>
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#include <crypto/sha.h>
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@ -35,6 +37,14 @@ struct ccp_crypto_ablkcipher_alg {
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struct crypto_alg alg;
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};
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struct ccp_crypto_aead {
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struct list_head entry;
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u32 mode;
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struct aead_alg alg;
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};
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struct ccp_crypto_ahash_alg {
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struct list_head entry;
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@ -97,6 +107,9 @@ struct ccp_aes_req_ctx {
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struct scatterlist iv_sg;
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u8 iv[AES_BLOCK_SIZE];
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struct scatterlist tag_sg;
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u8 tag[AES_BLOCK_SIZE];
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/* Fields used for RFC3686 requests */
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u8 *rfc3686_info;
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u8 rfc3686_iv[AES_BLOCK_SIZE];
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@ -233,6 +246,7 @@ struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table,
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int ccp_register_aes_algs(struct list_head *head);
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int ccp_register_aes_cmac_algs(struct list_head *head);
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int ccp_register_aes_xts_algs(struct list_head *head);
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int ccp_register_aes_aeads(struct list_head *head);
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int ccp_register_sha_algs(struct list_head *head);
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int ccp_register_des3_algs(struct list_head *head);
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@ -601,6 +601,255 @@ e_key:
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return ret;
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}
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static int ccp_run_aes_gcm_cmd(struct ccp_cmd_queue *cmd_q,
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struct ccp_cmd *cmd)
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{
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struct ccp_aes_engine *aes = &cmd->u.aes;
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struct ccp_dm_workarea key, ctx, final_wa, tag;
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struct ccp_data src, dst;
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struct ccp_data aad;
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struct ccp_op op;
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unsigned long long *final;
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unsigned int dm_offset;
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unsigned int ilen;
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bool in_place = true; /* Default value */
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int ret;
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struct scatterlist *p_inp, sg_inp[2];
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struct scatterlist *p_tag, sg_tag[2];
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struct scatterlist *p_outp, sg_outp[2];
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struct scatterlist *p_aad;
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if (!aes->iv)
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return -EINVAL;
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if (!((aes->key_len == AES_KEYSIZE_128) ||
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(aes->key_len == AES_KEYSIZE_192) ||
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(aes->key_len == AES_KEYSIZE_256)))
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return -EINVAL;
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if (!aes->key) /* Gotta have a key SGL */
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return -EINVAL;
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/* First, decompose the source buffer into AAD & PT,
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* and the destination buffer into AAD, CT & tag, or
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* the input into CT & tag.
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* It is expected that the input and output SGs will
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* be valid, even if the AAD and input lengths are 0.
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*/
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p_aad = aes->src;
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p_inp = scatterwalk_ffwd(sg_inp, aes->src, aes->aad_len);
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p_outp = scatterwalk_ffwd(sg_outp, aes->dst, aes->aad_len);
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if (aes->action == CCP_AES_ACTION_ENCRYPT) {
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ilen = aes->src_len;
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p_tag = scatterwalk_ffwd(sg_tag, p_outp, ilen);
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} else {
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/* Input length for decryption includes tag */
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ilen = aes->src_len - AES_BLOCK_SIZE;
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p_tag = scatterwalk_ffwd(sg_tag, p_inp, ilen);
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}
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memset(&op, 0, sizeof(op));
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op.cmd_q = cmd_q;
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op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
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op.sb_key = cmd_q->sb_key; /* Pre-allocated */
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op.sb_ctx = cmd_q->sb_ctx; /* Pre-allocated */
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op.init = 1;
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op.u.aes.type = aes->type;
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/* Copy the key to the LSB */
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ret = ccp_init_dm_workarea(&key, cmd_q,
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CCP_AES_CTX_SB_COUNT * CCP_SB_BYTES,
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DMA_TO_DEVICE);
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if (ret)
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return ret;
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dm_offset = CCP_SB_BYTES - aes->key_len;
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ccp_set_dm_area(&key, dm_offset, aes->key, 0, aes->key_len);
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ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key,
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CCP_PASSTHRU_BYTESWAP_256BIT);
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if (ret) {
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cmd->engine_error = cmd_q->cmd_error;
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goto e_key;
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}
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/* Copy the context (IV) to the LSB.
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* There is an assumption here that the IV is 96 bits in length, plus
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* a nonce of 32 bits. If no IV is present, use a zeroed buffer.
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*/
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ret = ccp_init_dm_workarea(&ctx, cmd_q,
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CCP_AES_CTX_SB_COUNT * CCP_SB_BYTES,
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DMA_BIDIRECTIONAL);
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if (ret)
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goto e_key;
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dm_offset = CCP_AES_CTX_SB_COUNT * CCP_SB_BYTES - aes->iv_len;
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ccp_set_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len);
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ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
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CCP_PASSTHRU_BYTESWAP_256BIT);
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if (ret) {
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||||
cmd->engine_error = cmd_q->cmd_error;
|
||||
goto e_ctx;
|
||||
}
|
||||
|
||||
op.init = 1;
|
||||
if (aes->aad_len > 0) {
|
||||
/* Step 1: Run a GHASH over the Additional Authenticated Data */
|
||||
ret = ccp_init_data(&aad, cmd_q, p_aad, aes->aad_len,
|
||||
AES_BLOCK_SIZE,
|
||||
DMA_TO_DEVICE);
|
||||
if (ret)
|
||||
goto e_ctx;
|
||||
|
||||
op.u.aes.mode = CCP_AES_MODE_GHASH;
|
||||
op.u.aes.action = CCP_AES_GHASHAAD;
|
||||
|
||||
while (aad.sg_wa.bytes_left) {
|
||||
ccp_prepare_data(&aad, NULL, &op, AES_BLOCK_SIZE, true);
|
||||
|
||||
ret = cmd_q->ccp->vdata->perform->aes(&op);
|
||||
if (ret) {
|
||||
cmd->engine_error = cmd_q->cmd_error;
|
||||
goto e_aad;
|
||||
}
|
||||
|
||||
ccp_process_data(&aad, NULL, &op);
|
||||
op.init = 0;
|
||||
}
|
||||
}
|
||||
|
||||
op.u.aes.mode = CCP_AES_MODE_GCTR;
|
||||
op.u.aes.action = aes->action;
|
||||
|
||||
if (ilen > 0) {
|
||||
/* Step 2: Run a GCTR over the plaintext */
|
||||
in_place = (sg_virt(p_inp) == sg_virt(p_outp)) ? true : false;
|
||||
|
||||
ret = ccp_init_data(&src, cmd_q, p_inp, ilen,
|
||||
AES_BLOCK_SIZE,
|
||||
in_place ? DMA_BIDIRECTIONAL
|
||||
: DMA_TO_DEVICE);
|
||||
if (ret)
|
||||
goto e_ctx;
|
||||
|
||||
if (in_place) {
|
||||
dst = src;
|
||||
} else {
|
||||
ret = ccp_init_data(&dst, cmd_q, p_outp, ilen,
|
||||
AES_BLOCK_SIZE, DMA_FROM_DEVICE);
|
||||
if (ret)
|
||||
goto e_src;
|
||||
}
|
||||
|
||||
op.soc = 0;
|
||||
op.eom = 0;
|
||||
op.init = 1;
|
||||
while (src.sg_wa.bytes_left) {
|
||||
ccp_prepare_data(&src, &dst, &op, AES_BLOCK_SIZE, true);
|
||||
if (!src.sg_wa.bytes_left) {
|
||||
unsigned int nbytes = aes->src_len
|
||||
% AES_BLOCK_SIZE;
|
||||
|
||||
if (nbytes) {
|
||||
op.eom = 1;
|
||||
op.u.aes.size = (nbytes * 8) - 1;
|
||||
}
|
||||
}
|
||||
|
||||
ret = cmd_q->ccp->vdata->perform->aes(&op);
|
||||
if (ret) {
|
||||
cmd->engine_error = cmd_q->cmd_error;
|
||||
goto e_dst;
|
||||
}
|
||||
|
||||
ccp_process_data(&src, &dst, &op);
|
||||
op.init = 0;
|
||||
}
|
||||
}
|
||||
|
||||
/* Step 3: Update the IV portion of the context with the original IV */
|
||||
ret = ccp_copy_from_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
|
||||
CCP_PASSTHRU_BYTESWAP_256BIT);
|
||||
if (ret) {
|
||||
cmd->engine_error = cmd_q->cmd_error;
|
||||
goto e_dst;
|
||||
}
|
||||
|
||||
ccp_set_dm_area(&ctx, dm_offset, aes->iv, 0, aes->iv_len);
|
||||
|
||||
ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
|
||||
CCP_PASSTHRU_BYTESWAP_256BIT);
|
||||
if (ret) {
|
||||
cmd->engine_error = cmd_q->cmd_error;
|
||||
goto e_dst;
|
||||
}
|
||||
|
||||
/* Step 4: Concatenate the lengths of the AAD and source, and
|
||||
* hash that 16 byte buffer.
|
||||
*/
|
||||
ret = ccp_init_dm_workarea(&final_wa, cmd_q, AES_BLOCK_SIZE,
|
||||
DMA_BIDIRECTIONAL);
|
||||
if (ret)
|
||||
goto e_dst;
|
||||
final = (unsigned long long *) final_wa.address;
|
||||
final[0] = cpu_to_be64(aes->aad_len * 8);
|
||||
final[1] = cpu_to_be64(ilen * 8);
|
||||
|
||||
op.u.aes.mode = CCP_AES_MODE_GHASH;
|
||||
op.u.aes.action = CCP_AES_GHASHFINAL;
|
||||
op.src.type = CCP_MEMTYPE_SYSTEM;
|
||||
op.src.u.dma.address = final_wa.dma.address;
|
||||
op.src.u.dma.length = AES_BLOCK_SIZE;
|
||||
op.dst.type = CCP_MEMTYPE_SYSTEM;
|
||||
op.dst.u.dma.address = final_wa.dma.address;
|
||||
op.dst.u.dma.length = AES_BLOCK_SIZE;
|
||||
op.eom = 1;
|
||||
op.u.aes.size = 0;
|
||||
ret = cmd_q->ccp->vdata->perform->aes(&op);
|
||||
if (ret)
|
||||
goto e_dst;
|
||||
|
||||
if (aes->action == CCP_AES_ACTION_ENCRYPT) {
|
||||
/* Put the ciphered tag after the ciphertext. */
|
||||
ccp_get_dm_area(&final_wa, 0, p_tag, 0, AES_BLOCK_SIZE);
|
||||
} else {
|
||||
/* Does this ciphered tag match the input? */
|
||||
ret = ccp_init_dm_workarea(&tag, cmd_q, AES_BLOCK_SIZE,
|
||||
DMA_BIDIRECTIONAL);
|
||||
if (ret)
|
||||
goto e_tag;
|
||||
ccp_set_dm_area(&tag, 0, p_tag, 0, AES_BLOCK_SIZE);
|
||||
|
||||
ret = memcmp(tag.address, final_wa.address, AES_BLOCK_SIZE);
|
||||
ccp_dm_free(&tag);
|
||||
}
|
||||
|
||||
e_tag:
|
||||
ccp_dm_free(&final_wa);
|
||||
|
||||
e_dst:
|
||||
if (aes->src_len && !in_place)
|
||||
ccp_free_data(&dst, cmd_q);
|
||||
|
||||
e_src:
|
||||
if (aes->src_len)
|
||||
ccp_free_data(&src, cmd_q);
|
||||
|
||||
e_aad:
|
||||
if (aes->aad_len)
|
||||
ccp_free_data(&aad, cmd_q);
|
||||
|
||||
e_ctx:
|
||||
ccp_dm_free(&ctx);
|
||||
|
||||
e_key:
|
||||
ccp_dm_free(&key);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ccp_run_aes_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
|
||||
{
|
||||
struct ccp_aes_engine *aes = &cmd->u.aes;
|
||||
|
|
@ -614,6 +863,9 @@ static int ccp_run_aes_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
|
|||
if (aes->mode == CCP_AES_MODE_CMAC)
|
||||
return ccp_run_aes_cmac_cmd(cmd_q, cmd);
|
||||
|
||||
if (aes->mode == CCP_AES_MODE_GCM)
|
||||
return ccp_run_aes_gcm_cmd(cmd_q, cmd);
|
||||
|
||||
if (!((aes->key_len == AES_KEYSIZE_128) ||
|
||||
(aes->key_len == AES_KEYSIZE_192) ||
|
||||
(aes->key_len == AES_KEYSIZE_256)))
|
||||
|
|
|
|||
|
|
@ -123,6 +123,10 @@ enum ccp_aes_mode {
|
|||
CCP_AES_MODE_CFB,
|
||||
CCP_AES_MODE_CTR,
|
||||
CCP_AES_MODE_CMAC,
|
||||
CCP_AES_MODE_GHASH,
|
||||
CCP_AES_MODE_GCTR,
|
||||
CCP_AES_MODE_GCM,
|
||||
CCP_AES_MODE_GMAC,
|
||||
CCP_AES_MODE__LAST,
|
||||
};
|
||||
|
||||
|
|
@ -137,6 +141,9 @@ enum ccp_aes_action {
|
|||
CCP_AES_ACTION_ENCRYPT,
|
||||
CCP_AES_ACTION__LAST,
|
||||
};
|
||||
/* Overloaded field */
|
||||
#define CCP_AES_GHASHAAD CCP_AES_ACTION_DECRYPT
|
||||
#define CCP_AES_GHASHFINAL CCP_AES_ACTION_ENCRYPT
|
||||
|
||||
/**
|
||||
* struct ccp_aes_engine - CCP AES operation
|
||||
|
|
@ -181,6 +188,8 @@ struct ccp_aes_engine {
|
|||
struct scatterlist *cmac_key; /* K1/K2 cmac key required for
|
||||
* final cmac cmd */
|
||||
u32 cmac_key_len; /* In bytes */
|
||||
|
||||
u32 aad_len; /* In bytes */
|
||||
};
|
||||
|
||||
/***** XTS-AES engine *****/
|
||||
|
|
|
|||
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