UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity
OpenCloudOS-Kernel/drivers/crypto/amcc/crypto4xx_alg.c

722 lines
20 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/**
* AMCC SoC PPC4xx Crypto Driver
*
* Copyright (c) 2008 Applied Micro Circuits Corporation.
* All rights reserved. James Hsiao <jhsiao@amcc.com>
*
* 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 <crypto/skcipher.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;
}
static inline int crypto4xx_crypt(struct skcipher_request *req,
const unsigned int ivlen, bool decrypt,
bool check_blocksize)
{
struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
__le32 iv[AES_IV_SIZE];
if (check_blocksize && !IS_ALIGNED(req->cryptlen, AES_BLOCK_SIZE))
return -EINVAL;
if (ivlen)
crypto4xx_memcpy_to_le32(iv, req->iv, ivlen);
return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
req->cryptlen, iv, ivlen, decrypt ? ctx->sa_in : ctx->sa_out,
ctx->sa_len, 0, NULL);
}
int crypto4xx_encrypt_noiv_block(struct skcipher_request *req)
{
return crypto4xx_crypt(req, 0, false, true);
}
int crypto4xx_encrypt_iv_stream(struct skcipher_request *req)
{
return crypto4xx_crypt(req, AES_IV_SIZE, false, false);
}
int crypto4xx_decrypt_noiv_block(struct skcipher_request *req)
{
return crypto4xx_crypt(req, 0, true, true);
}
int crypto4xx_decrypt_iv_stream(struct skcipher_request *req)
{
return crypto4xx_crypt(req, AES_IV_SIZE, true, false);
}
int crypto4xx_encrypt_iv_block(struct skcipher_request *req)
{
return crypto4xx_crypt(req, AES_IV_SIZE, false, true);
}
int crypto4xx_decrypt_iv_block(struct skcipher_request *req)
{
return crypto4xx_crypt(req, AES_IV_SIZE, true, true);
}
/**
* AES Functions
*/
static int crypto4xx_setkey_aes(struct crypto_skcipher *cipher,
const u8 *key,
unsigned int keylen,
unsigned char cm,
u8 fb)
{
struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
struct dynamic_sa_ctl *sa;
int rc;
if (keylen != AES_KEYSIZE_256 && keylen != AES_KEYSIZE_192 &&
keylen != AES_KEYSIZE_128)
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, (cm == CRYPTO_MODE_ECB ?
SA_NOT_SAVE_IV : SA_SAVE_IV),
SA_NOT_LOAD_HASH, (cm == CRYPTO_MODE_ECB ?
SA_LOAD_IV_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;
/*
* SA_OPCODE_ENCRYPT is the same value as SA_OPCODE_DECRYPT.
* it's the DIR_(IN|OUT)BOUND that matters
*/
sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT;
return 0;
}
int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *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_skcipher *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_skcipher *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_skcipher *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_skcipher *cipher,
const u8 *key, unsigned int keylen)
{
struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
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 skcipher_request *req)
{
struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
__le32 iv[AES_IV_SIZE / 4] = {
ctx->iv_nonce,
cpu_to_le32p((u32 *) req->iv),
cpu_to_le32p((u32 *) (req->iv + 4)),
cpu_to_le32(1) };
return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
req->cryptlen, iv, AES_IV_SIZE,
ctx->sa_out, ctx->sa_len, 0, NULL);
}
int crypto4xx_rfc3686_decrypt(struct skcipher_request *req)
{
struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
__le32 iv[AES_IV_SIZE / 4] = {
ctx->iv_nonce,
cpu_to_le32p((u32 *) req->iv),
cpu_to_le32p((u32 *) (req->iv + 4)),
cpu_to_le32(1) };
return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
req->cryptlen, iv, AES_IV_SIZE,
ctx->sa_out, ctx->sa_len, 0, NULL);
}
static int
crypto4xx_ctr_crypt(struct skcipher_request *req, bool encrypt)
{
struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
size_t iv_len = crypto_skcipher_ivsize(cipher);
unsigned int counter = be32_to_cpup((__be32 *)(req->iv + iv_len - 4));
unsigned int nblks = ALIGN(req->cryptlen, AES_BLOCK_SIZE) /
AES_BLOCK_SIZE;
/*
* The hardware uses only the last 32-bits as the counter while the
* kernel tests (aes_ctr_enc_tv_template[4] for example) expect that
* the whole IV is a counter. So fallback if the counter is going to
* overlow.
*/
if (counter + nblks < counter) {
SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->sw_cipher.cipher);
int ret;
skcipher_request_set_sync_tfm(subreq, ctx->sw_cipher.cipher);
skcipher_request_set_callback(subreq, req->base.flags,
NULL, NULL);
skcipher_request_set_crypt(subreq, req->src, req->dst,
req->cryptlen, req->iv);
ret = encrypt ? crypto_skcipher_encrypt(subreq)
: crypto_skcipher_decrypt(subreq);
skcipher_request_zero(subreq);
return ret;
}
return encrypt ? crypto4xx_encrypt_iv_stream(req)
: crypto4xx_decrypt_iv_stream(req);
}
static int crypto4xx_sk_setup_fallback(struct crypto4xx_ctx *ctx,
struct crypto_skcipher *cipher,
const u8 *key,
unsigned int keylen)
{
crypto_sync_skcipher_clear_flags(ctx->sw_cipher.cipher,
CRYPTO_TFM_REQ_MASK);
crypto_sync_skcipher_set_flags(ctx->sw_cipher.cipher,
crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
return crypto_sync_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen);
}
int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
const u8 *key, unsigned int keylen)
{
struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
int rc;
rc = crypto4xx_sk_setup_fallback(ctx, cipher, key, keylen);
if (rc)
return rc;
return crypto4xx_setkey_aes(cipher, key, keylen,
CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
}
int crypto4xx_encrypt_ctr(struct skcipher_request *req)
{
return crypto4xx_ctr_crypt(req, true);
}
int crypto4xx_decrypt_ctr(struct skcipher_request *req)
{
return crypto4xx_ctr_crypt(req, false);
}
static inline bool crypto4xx_aead_need_fallback(struct aead_request *req,
unsigned int len,
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 plaintext
* is less than a block.
*/
if (len < AES_BLOCK_SIZE)
return true;
/* assoc len needs to be a multiple of 4 and <= 1020 */
if (req->assoclen & 0x3 || req->assoclen > 1020)
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)
{
struct aead_request *subreq = aead_request_ctx(req);
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_aead_setup_fallback(struct crypto4xx_ctx *ctx,
struct crypto_aead *cipher,
const u8 *key,
unsigned int keylen)
{
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);
return crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen);
}
/**
* 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_aead_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 crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
struct crypto_aead *aead = crypto_aead_reqtfm(req);
__le32 iv[16];
u32 tmp_sa[SA_AES128_CCM_LEN + 4];
struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa;
unsigned int len = req->cryptlen;
if (decrypt)
len -= crypto_aead_authsize(aead);
if (crypto4xx_aead_need_fallback(req, len, true, decrypt))
return crypto4xx_aead_fallback(req, ctx, decrypt);
memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, ctx->sa_len * 4);
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, rctx->dst);
}
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_aes_ctx ctx;
uint8_t src[16] = { 0 };
int rc;
rc = aes_expandkey(&ctx, key, keylen);
if (rc) {
pr_err("aes_expandkey() failed: %d\n", rc);
return rc;
}
aes_encrypt(&ctx, src, src);
crypto4xx_memcpy_to_le32(hash_start, src, 16);
memzero_explicit(&ctx, sizeof(ctx));
return 0;
}
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)
return -EINVAL;
rc = crypto4xx_aead_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);
struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
__le32 iv[4];
unsigned int len = req->cryptlen;
if (decrypt)
len -= crypto_aead_authsize(crypto_aead_reqtfm(req));
if (crypto4xx_aead_need_fallback(req, len, 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);
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, rctx->dst);
}
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, NULL);
}
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, NULL);
}
/**
* 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);
}
Reference in New Issue View Git Blame Copy Permalink