656 lines
18 KiB
C
656 lines
18 KiB
C
/**
|
|
* AMCC SoC PPC4xx Crypto Driver
|
|
*
|
|
* Copyright (c) 2008 Applied Micro Circuits Corporation.
|
|
* All rights reserved. James Hsiao <jhsiao@amcc.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* This file implements the Linux crypto algorithms.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/spinlock_types.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/hash.h>
|
|
#include <crypto/internal/hash.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <crypto/algapi.h>
|
|
#include <crypto/aead.h>
|
|
#include <crypto/aes.h>
|
|
#include <crypto/gcm.h>
|
|
#include <crypto/sha.h>
|
|
#include <crypto/ctr.h>
|
|
#include "crypto4xx_reg_def.h"
|
|
#include "crypto4xx_core.h"
|
|
#include "crypto4xx_sa.h"
|
|
|
|
static void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h,
|
|
u32 save_iv, u32 ld_h, u32 ld_iv,
|
|
u32 hdr_proc, u32 h, u32 c, u32 pad_type,
|
|
u32 op_grp, u32 op, u32 dir)
|
|
{
|
|
sa->sa_command_0.w = 0;
|
|
sa->sa_command_0.bf.save_hash_state = save_h;
|
|
sa->sa_command_0.bf.save_iv = save_iv;
|
|
sa->sa_command_0.bf.load_hash_state = ld_h;
|
|
sa->sa_command_0.bf.load_iv = ld_iv;
|
|
sa->sa_command_0.bf.hdr_proc = hdr_proc;
|
|
sa->sa_command_0.bf.hash_alg = h;
|
|
sa->sa_command_0.bf.cipher_alg = c;
|
|
sa->sa_command_0.bf.pad_type = pad_type & 3;
|
|
sa->sa_command_0.bf.extend_pad = pad_type >> 2;
|
|
sa->sa_command_0.bf.op_group = op_grp;
|
|
sa->sa_command_0.bf.opcode = op;
|
|
sa->sa_command_0.bf.dir = dir;
|
|
}
|
|
|
|
static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm,
|
|
u32 hmac_mc, u32 cfb, u32 esn,
|
|
u32 sn_mask, u32 mute, u32 cp_pad,
|
|
u32 cp_pay, u32 cp_hdr)
|
|
{
|
|
sa->sa_command_1.w = 0;
|
|
sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2;
|
|
sa->sa_command_1.bf.crypto_mode9_8 = cm & 3;
|
|
sa->sa_command_1.bf.feedback_mode = cfb,
|
|
sa->sa_command_1.bf.sa_rev = 1;
|
|
sa->sa_command_1.bf.hmac_muting = hmac_mc;
|
|
sa->sa_command_1.bf.extended_seq_num = esn;
|
|
sa->sa_command_1.bf.seq_num_mask = sn_mask;
|
|
sa->sa_command_1.bf.mutable_bit_proc = mute;
|
|
sa->sa_command_1.bf.copy_pad = cp_pad;
|
|
sa->sa_command_1.bf.copy_payload = cp_pay;
|
|
sa->sa_command_1.bf.copy_hdr = cp_hdr;
|
|
}
|
|
|
|
int crypto4xx_encrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
|
|
unsigned int ivlen = crypto_ablkcipher_ivsize(
|
|
crypto_ablkcipher_reqtfm(req));
|
|
__le32 iv[ivlen];
|
|
|
|
if (ivlen)
|
|
crypto4xx_memcpy_to_le32(iv, req->info, ivlen);
|
|
|
|
return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
|
|
req->nbytes, iv, ivlen, ctx->sa_out, ctx->sa_len, 0);
|
|
}
|
|
|
|
int crypto4xx_decrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
|
|
unsigned int ivlen = crypto_ablkcipher_ivsize(
|
|
crypto_ablkcipher_reqtfm(req));
|
|
__le32 iv[ivlen];
|
|
|
|
if (ivlen)
|
|
crypto4xx_memcpy_to_le32(iv, req->info, ivlen);
|
|
|
|
return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
|
|
req->nbytes, iv, ivlen, ctx->sa_in, ctx->sa_len, 0);
|
|
}
|
|
|
|
/**
|
|
* AES Functions
|
|
*/
|
|
static int crypto4xx_setkey_aes(struct crypto_ablkcipher *cipher,
|
|
const u8 *key,
|
|
unsigned int keylen,
|
|
unsigned char cm,
|
|
u8 fb)
|
|
{
|
|
struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
struct dynamic_sa_ctl *sa;
|
|
int rc;
|
|
|
|
if (keylen != AES_KEYSIZE_256 &&
|
|
keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) {
|
|
crypto_ablkcipher_set_flags(cipher,
|
|
CRYPTO_TFM_RES_BAD_KEY_LEN);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Create SA */
|
|
if (ctx->sa_in || ctx->sa_out)
|
|
crypto4xx_free_sa(ctx);
|
|
|
|
rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* Setup SA */
|
|
sa = ctx->sa_in;
|
|
|
|
set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, SA_NOT_SAVE_IV,
|
|
SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
|
|
SA_NO_HEADER_PROC, SA_HASH_ALG_NULL,
|
|
SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
|
|
SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT,
|
|
DIR_INBOUND);
|
|
|
|
set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH,
|
|
fb, SA_EXTENDED_SN_OFF,
|
|
SA_SEQ_MASK_OFF, SA_MC_ENABLE,
|
|
SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
|
|
SA_NOT_COPY_HDR);
|
|
crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
|
|
key, keylen);
|
|
sa->sa_contents.w = SA_AES_CONTENTS | (keylen << 2);
|
|
sa->sa_command_1.bf.key_len = keylen >> 3;
|
|
|
|
memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
|
|
sa = ctx->sa_out;
|
|
sa->sa_command_0.bf.dir = DIR_OUTBOUND;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
|
|
const u8 *key, unsigned int keylen)
|
|
{
|
|
return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC,
|
|
CRYPTO_FEEDBACK_MODE_NO_FB);
|
|
}
|
|
|
|
int crypto4xx_setkey_aes_cfb(struct crypto_ablkcipher *cipher,
|
|
const u8 *key, unsigned int keylen)
|
|
{
|
|
return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CFB,
|
|
CRYPTO_FEEDBACK_MODE_128BIT_CFB);
|
|
}
|
|
|
|
int crypto4xx_setkey_aes_ecb(struct crypto_ablkcipher *cipher,
|
|
const u8 *key, unsigned int keylen)
|
|
{
|
|
return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_ECB,
|
|
CRYPTO_FEEDBACK_MODE_NO_FB);
|
|
}
|
|
|
|
int crypto4xx_setkey_aes_ofb(struct crypto_ablkcipher *cipher,
|
|
const u8 *key, unsigned int keylen)
|
|
{
|
|
return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_OFB,
|
|
CRYPTO_FEEDBACK_MODE_64BIT_OFB);
|
|
}
|
|
|
|
int crypto4xx_setkey_rfc3686(struct crypto_ablkcipher *cipher,
|
|
const u8 *key, unsigned int keylen)
|
|
{
|
|
struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
int rc;
|
|
|
|
rc = crypto4xx_setkey_aes(cipher, key, keylen - CTR_RFC3686_NONCE_SIZE,
|
|
CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
|
|
if (rc)
|
|
return rc;
|
|
|
|
ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen -
|
|
CTR_RFC3686_NONCE_SIZE]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int crypto4xx_rfc3686_encrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
|
|
__le32 iv[AES_IV_SIZE / 4] = {
|
|
ctx->iv_nonce,
|
|
cpu_to_le32p((u32 *) req->info),
|
|
cpu_to_le32p((u32 *) (req->info + 4)),
|
|
cpu_to_le32(1) };
|
|
|
|
return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
|
|
req->nbytes, iv, AES_IV_SIZE,
|
|
ctx->sa_out, ctx->sa_len, 0);
|
|
}
|
|
|
|
int crypto4xx_rfc3686_decrypt(struct ablkcipher_request *req)
|
|
{
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
|
|
__le32 iv[AES_IV_SIZE / 4] = {
|
|
ctx->iv_nonce,
|
|
cpu_to_le32p((u32 *) req->info),
|
|
cpu_to_le32p((u32 *) (req->info + 4)),
|
|
cpu_to_le32(1) };
|
|
|
|
return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
|
|
req->nbytes, iv, AES_IV_SIZE,
|
|
ctx->sa_out, ctx->sa_len, 0);
|
|
}
|
|
|
|
static inline bool crypto4xx_aead_need_fallback(struct aead_request *req,
|
|
bool is_ccm, bool decrypt)
|
|
{
|
|
struct crypto_aead *aead = crypto_aead_reqtfm(req);
|
|
|
|
/* authsize has to be a multiple of 4 */
|
|
if (aead->authsize & 3)
|
|
return true;
|
|
|
|
/*
|
|
* hardware does not handle cases where cryptlen
|
|
* is less than a block
|
|
*/
|
|
if (req->cryptlen < AES_BLOCK_SIZE)
|
|
return true;
|
|
|
|
/* assoc len needs to be a multiple of 4 */
|
|
if (req->assoclen & 0x3)
|
|
return true;
|
|
|
|
/* CCM supports only counter field length of 2 and 4 bytes */
|
|
if (is_ccm && !(req->iv[0] == 1 || req->iv[0] == 3))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static int crypto4xx_aead_fallback(struct aead_request *req,
|
|
struct crypto4xx_ctx *ctx, bool do_decrypt)
|
|
{
|
|
char aead_req_data[sizeof(struct aead_request) +
|
|
crypto_aead_reqsize(ctx->sw_cipher.aead)]
|
|
__aligned(__alignof__(struct aead_request));
|
|
|
|
struct aead_request *subreq = (void *) aead_req_data;
|
|
|
|
memset(subreq, 0, sizeof(aead_req_data));
|
|
|
|
aead_request_set_tfm(subreq, ctx->sw_cipher.aead);
|
|
aead_request_set_callback(subreq, req->base.flags,
|
|
req->base.complete, req->base.data);
|
|
aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
|
|
req->iv);
|
|
aead_request_set_ad(subreq, req->assoclen);
|
|
return do_decrypt ? crypto_aead_decrypt(subreq) :
|
|
crypto_aead_encrypt(subreq);
|
|
}
|
|
|
|
static int crypto4xx_setup_fallback(struct crypto4xx_ctx *ctx,
|
|
struct crypto_aead *cipher,
|
|
const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
int rc;
|
|
|
|
crypto_aead_clear_flags(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK);
|
|
crypto_aead_set_flags(ctx->sw_cipher.aead,
|
|
crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
|
|
rc = crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen);
|
|
crypto_aead_clear_flags(cipher, CRYPTO_TFM_RES_MASK);
|
|
crypto_aead_set_flags(cipher,
|
|
crypto_aead_get_flags(ctx->sw_cipher.aead) &
|
|
CRYPTO_TFM_RES_MASK);
|
|
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* AES-CCM Functions
|
|
*/
|
|
|
|
int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
struct dynamic_sa_ctl *sa;
|
|
int rc = 0;
|
|
|
|
rc = crypto4xx_setup_fallback(ctx, cipher, key, keylen);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (ctx->sa_in || ctx->sa_out)
|
|
crypto4xx_free_sa(ctx);
|
|
|
|
rc = crypto4xx_alloc_sa(ctx, SA_AES128_CCM_LEN + (keylen - 16) / 4);
|
|
if (rc)
|
|
return rc;
|
|
|
|
/* Setup SA */
|
|
sa = (struct dynamic_sa_ctl *) ctx->sa_in;
|
|
sa->sa_contents.w = SA_AES_CCM_CONTENTS | (keylen << 2);
|
|
|
|
set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
|
|
SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
|
|
SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
|
|
SA_CIPHER_ALG_AES,
|
|
SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
|
|
SA_OPCODE_HASH_DECRYPT, DIR_INBOUND);
|
|
|
|
set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
|
|
CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
|
|
SA_SEQ_MASK_OFF, SA_MC_ENABLE,
|
|
SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
|
|
SA_NOT_COPY_HDR);
|
|
|
|
sa->sa_command_1.bf.key_len = keylen >> 3;
|
|
|
|
crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), key, keylen);
|
|
|
|
memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
|
|
sa = (struct dynamic_sa_ctl *) ctx->sa_out;
|
|
|
|
set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
|
|
SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
|
|
SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC,
|
|
SA_CIPHER_ALG_AES,
|
|
SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
|
|
SA_OPCODE_ENCRYPT_HASH, DIR_OUTBOUND);
|
|
|
|
set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
|
|
CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
|
|
SA_SEQ_MASK_OFF, SA_MC_ENABLE,
|
|
SA_COPY_PAD, SA_COPY_PAYLOAD,
|
|
SA_NOT_COPY_HDR);
|
|
|
|
sa->sa_command_1.bf.key_len = keylen >> 3;
|
|
return 0;
|
|
}
|
|
|
|
static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt)
|
|
{
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
|
|
struct crypto_aead *aead = crypto_aead_reqtfm(req);
|
|
unsigned int len = req->cryptlen;
|
|
__le32 iv[16];
|
|
u32 tmp_sa[ctx->sa_len * 4];
|
|
struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa;
|
|
|
|
if (crypto4xx_aead_need_fallback(req, true, decrypt))
|
|
return crypto4xx_aead_fallback(req, ctx, decrypt);
|
|
|
|
if (decrypt)
|
|
len -= crypto_aead_authsize(aead);
|
|
|
|
memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, sizeof(tmp_sa));
|
|
sa->sa_command_0.bf.digest_len = crypto_aead_authsize(aead) >> 2;
|
|
|
|
if (req->iv[0] == 1) {
|
|
/* CRYPTO_MODE_AES_ICM */
|
|
sa->sa_command_1.bf.crypto_mode9_8 = 1;
|
|
}
|
|
|
|
iv[3] = cpu_to_le32(0);
|
|
crypto4xx_memcpy_to_le32(iv, req->iv, 16 - (req->iv[0] + 1));
|
|
|
|
return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
|
|
len, iv, sizeof(iv),
|
|
sa, ctx->sa_len, req->assoclen);
|
|
}
|
|
|
|
int crypto4xx_encrypt_aes_ccm(struct aead_request *req)
|
|
{
|
|
return crypto4xx_crypt_aes_ccm(req, false);
|
|
}
|
|
|
|
int crypto4xx_decrypt_aes_ccm(struct aead_request *req)
|
|
{
|
|
return crypto4xx_crypt_aes_ccm(req, true);
|
|
}
|
|
|
|
int crypto4xx_setauthsize_aead(struct crypto_aead *cipher,
|
|
unsigned int authsize)
|
|
{
|
|
struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
|
|
return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize);
|
|
}
|
|
|
|
/**
|
|
* AES-GCM Functions
|
|
*/
|
|
|
|
static int crypto4xx_aes_gcm_validate_keylen(unsigned int keylen)
|
|
{
|
|
switch (keylen) {
|
|
case 16:
|
|
case 24:
|
|
case 32:
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int crypto4xx_compute_gcm_hash_key_sw(__le32 *hash_start, const u8 *key,
|
|
unsigned int keylen)
|
|
{
|
|
struct crypto_cipher *aes_tfm = NULL;
|
|
uint8_t src[16] = { 0 };
|
|
int rc = 0;
|
|
|
|
aes_tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC |
|
|
CRYPTO_ALG_NEED_FALLBACK);
|
|
if (IS_ERR(aes_tfm)) {
|
|
rc = PTR_ERR(aes_tfm);
|
|
pr_warn("could not load aes cipher driver: %d\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
rc = crypto_cipher_setkey(aes_tfm, key, keylen);
|
|
if (rc) {
|
|
pr_err("setkey() failed: %d\n", rc);
|
|
goto out;
|
|
}
|
|
|
|
crypto_cipher_encrypt_one(aes_tfm, src, src);
|
|
crypto4xx_memcpy_to_le32(hash_start, src, 16);
|
|
out:
|
|
crypto_free_cipher(aes_tfm);
|
|
return rc;
|
|
}
|
|
|
|
int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
|
|
const u8 *key, unsigned int keylen)
|
|
{
|
|
struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
struct dynamic_sa_ctl *sa;
|
|
int rc = 0;
|
|
|
|
if (crypto4xx_aes_gcm_validate_keylen(keylen) != 0) {
|
|
crypto_aead_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
|
|
return -EINVAL;
|
|
}
|
|
|
|
rc = crypto4xx_setup_fallback(ctx, cipher, key, keylen);
|
|
if (rc)
|
|
return rc;
|
|
|
|
if (ctx->sa_in || ctx->sa_out)
|
|
crypto4xx_free_sa(ctx);
|
|
|
|
rc = crypto4xx_alloc_sa(ctx, SA_AES128_GCM_LEN + (keylen - 16) / 4);
|
|
if (rc)
|
|
return rc;
|
|
|
|
sa = (struct dynamic_sa_ctl *) ctx->sa_in;
|
|
|
|
sa->sa_contents.w = SA_AES_GCM_CONTENTS | (keylen << 2);
|
|
set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
|
|
SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
|
|
SA_NO_HEADER_PROC, SA_HASH_ALG_GHASH,
|
|
SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
|
|
SA_OP_GROUP_BASIC, SA_OPCODE_HASH_DECRYPT,
|
|
DIR_INBOUND);
|
|
set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH,
|
|
CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
|
|
SA_SEQ_MASK_ON, SA_MC_DISABLE,
|
|
SA_NOT_COPY_PAD, SA_COPY_PAYLOAD,
|
|
SA_NOT_COPY_HDR);
|
|
|
|
sa->sa_command_1.bf.key_len = keylen >> 3;
|
|
|
|
crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa),
|
|
key, keylen);
|
|
|
|
rc = crypto4xx_compute_gcm_hash_key_sw(get_dynamic_sa_inner_digest(sa),
|
|
key, keylen);
|
|
if (rc) {
|
|
pr_err("GCM hash key setting failed = %d\n", rc);
|
|
goto err;
|
|
}
|
|
|
|
memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
|
|
sa = (struct dynamic_sa_ctl *) ctx->sa_out;
|
|
sa->sa_command_0.bf.dir = DIR_OUTBOUND;
|
|
sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT_HASH;
|
|
|
|
return 0;
|
|
err:
|
|
crypto4xx_free_sa(ctx);
|
|
return rc;
|
|
}
|
|
|
|
static inline int crypto4xx_crypt_aes_gcm(struct aead_request *req,
|
|
bool decrypt)
|
|
{
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
|
|
unsigned int len = req->cryptlen;
|
|
__le32 iv[4];
|
|
|
|
if (crypto4xx_aead_need_fallback(req, false, decrypt))
|
|
return crypto4xx_aead_fallback(req, ctx, decrypt);
|
|
|
|
crypto4xx_memcpy_to_le32(iv, req->iv, GCM_AES_IV_SIZE);
|
|
iv[3] = cpu_to_le32(1);
|
|
|
|
if (decrypt)
|
|
len -= crypto_aead_authsize(crypto_aead_reqtfm(req));
|
|
|
|
return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
|
|
len, iv, sizeof(iv),
|
|
decrypt ? ctx->sa_in : ctx->sa_out,
|
|
ctx->sa_len, req->assoclen);
|
|
}
|
|
|
|
int crypto4xx_encrypt_aes_gcm(struct aead_request *req)
|
|
{
|
|
return crypto4xx_crypt_aes_gcm(req, false);
|
|
}
|
|
|
|
int crypto4xx_decrypt_aes_gcm(struct aead_request *req)
|
|
{
|
|
return crypto4xx_crypt_aes_gcm(req, true);
|
|
}
|
|
|
|
/**
|
|
* HASH SHA1 Functions
|
|
*/
|
|
static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
|
|
unsigned int sa_len,
|
|
unsigned char ha,
|
|
unsigned char hm)
|
|
{
|
|
struct crypto_alg *alg = tfm->__crt_alg;
|
|
struct crypto4xx_alg *my_alg;
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
|
|
struct dynamic_sa_hash160 *sa;
|
|
int rc;
|
|
|
|
my_alg = container_of(__crypto_ahash_alg(alg), struct crypto4xx_alg,
|
|
alg.u.hash);
|
|
ctx->dev = my_alg->dev;
|
|
|
|
/* Create SA */
|
|
if (ctx->sa_in || ctx->sa_out)
|
|
crypto4xx_free_sa(ctx);
|
|
|
|
rc = crypto4xx_alloc_sa(ctx, sa_len);
|
|
if (rc)
|
|
return rc;
|
|
|
|
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
|
|
sizeof(struct crypto4xx_ctx));
|
|
sa = (struct dynamic_sa_hash160 *)ctx->sa_in;
|
|
set_dynamic_sa_command_0(&sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV,
|
|
SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
|
|
SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
|
|
SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
|
|
SA_OPCODE_HASH, DIR_INBOUND);
|
|
set_dynamic_sa_command_1(&sa->ctrl, 0, SA_HASH_MODE_HASH,
|
|
CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
|
|
SA_SEQ_MASK_OFF, SA_MC_ENABLE,
|
|
SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
|
|
SA_NOT_COPY_HDR);
|
|
/* Need to zero hash digest in SA */
|
|
memset(sa->inner_digest, 0, sizeof(sa->inner_digest));
|
|
memset(sa->outer_digest, 0, sizeof(sa->outer_digest));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int crypto4xx_hash_init(struct ahash_request *req)
|
|
{
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
|
|
int ds;
|
|
struct dynamic_sa_ctl *sa;
|
|
|
|
sa = ctx->sa_in;
|
|
ds = crypto_ahash_digestsize(
|
|
__crypto_ahash_cast(req->base.tfm));
|
|
sa->sa_command_0.bf.digest_len = ds >> 2;
|
|
sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int crypto4xx_hash_update(struct ahash_request *req)
|
|
{
|
|
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
|
|
struct scatterlist dst;
|
|
unsigned int ds = crypto_ahash_digestsize(ahash);
|
|
|
|
sg_init_one(&dst, req->result, ds);
|
|
|
|
return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
|
|
req->nbytes, NULL, 0, ctx->sa_in,
|
|
ctx->sa_len, 0);
|
|
}
|
|
|
|
int crypto4xx_hash_final(struct ahash_request *req)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int crypto4xx_hash_digest(struct ahash_request *req)
|
|
{
|
|
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
|
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
|
|
struct scatterlist dst;
|
|
unsigned int ds = crypto_ahash_digestsize(ahash);
|
|
|
|
sg_init_one(&dst, req->result, ds);
|
|
|
|
return crypto4xx_build_pd(&req->base, ctx, req->src, &dst,
|
|
req->nbytes, NULL, 0, ctx->sa_in,
|
|
ctx->sa_len, 0);
|
|
}
|
|
|
|
/**
|
|
* SHA1 Algorithm
|
|
*/
|
|
int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
|
|
{
|
|
return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,
|
|
SA_HASH_MODE_HASH);
|
|
}
|