509 lines
14 KiB
C
509 lines
14 KiB
C
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/*
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* Crypto acceleration support for Rockchip RK3288
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*
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* Copyright (c) 2015, Fuzhou Rockchip Electronics Co., Ltd
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*
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* Author: Zain Wang <zain.wang@rock-chips.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* Some ideas are from marvell-cesa.c and s5p-sss.c driver.
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*/
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#include "rk3288_crypto.h"
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#define RK_CRYPTO_DEC BIT(0)
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static void rk_crypto_complete(struct crypto_async_request *base, int err)
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{
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if (base->complete)
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base->complete(base, err);
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}
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static int rk_handle_req(struct rk_crypto_info *dev,
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struct ablkcipher_request *req)
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{
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if (!IS_ALIGNED(req->nbytes, dev->align_size))
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return -EINVAL;
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else
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return dev->enqueue(dev, &req->base);
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}
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static int rk_aes_setkey(struct crypto_ablkcipher *cipher,
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const u8 *key, unsigned int keylen)
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{
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struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
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struct rk_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
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if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 &&
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keylen != AES_KEYSIZE_256) {
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crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
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return -EINVAL;
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}
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ctx->keylen = keylen;
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memcpy_toio(ctx->dev->reg + RK_CRYPTO_AES_KEY_0, key, keylen);
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return 0;
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}
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static int rk_tdes_setkey(struct crypto_ablkcipher *cipher,
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const u8 *key, unsigned int keylen)
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{
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struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
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struct rk_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
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u32 tmp[DES_EXPKEY_WORDS];
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if (keylen != DES_KEY_SIZE && keylen != DES3_EDE_KEY_SIZE) {
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crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
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return -EINVAL;
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}
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if (keylen == DES_KEY_SIZE) {
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if (!des_ekey(tmp, key) &&
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(tfm->crt_flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
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tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY;
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return -EINVAL;
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}
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}
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ctx->keylen = keylen;
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memcpy_toio(ctx->dev->reg + RK_CRYPTO_TDES_KEY1_0, key, keylen);
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return 0;
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}
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static int rk_aes_ecb_encrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_AES_ECB_MODE;
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return rk_handle_req(dev, req);
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}
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static int rk_aes_ecb_decrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_AES_ECB_MODE | RK_CRYPTO_DEC;
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return rk_handle_req(dev, req);
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}
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static int rk_aes_cbc_encrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_AES_CBC_MODE;
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return rk_handle_req(dev, req);
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}
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static int rk_aes_cbc_decrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_AES_CBC_MODE | RK_CRYPTO_DEC;
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return rk_handle_req(dev, req);
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}
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static int rk_des_ecb_encrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = 0;
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return rk_handle_req(dev, req);
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}
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static int rk_des_ecb_decrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_DEC;
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return rk_handle_req(dev, req);
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}
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static int rk_des_cbc_encrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_TDES_CHAINMODE_CBC;
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return rk_handle_req(dev, req);
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}
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static int rk_des_cbc_decrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_TDES_CHAINMODE_CBC | RK_CRYPTO_DEC;
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return rk_handle_req(dev, req);
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}
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static int rk_des3_ede_ecb_encrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_TDES_SELECT;
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return rk_handle_req(dev, req);
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}
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static int rk_des3_ede_ecb_decrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_DEC;
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return rk_handle_req(dev, req);
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}
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static int rk_des3_ede_cbc_encrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC;
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return rk_handle_req(dev, req);
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}
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static int rk_des3_ede_cbc_decrypt(struct ablkcipher_request *req)
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{
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm);
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struct rk_crypto_info *dev = ctx->dev;
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ctx->mode = RK_CRYPTO_TDES_SELECT | RK_CRYPTO_TDES_CHAINMODE_CBC |
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RK_CRYPTO_DEC;
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return rk_handle_req(dev, req);
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}
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static void rk_ablk_hw_init(struct rk_crypto_info *dev)
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{
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struct ablkcipher_request *req =
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ablkcipher_request_cast(dev->async_req);
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struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(req);
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struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
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struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(cipher);
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u32 ivsize, block, conf_reg = 0;
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block = crypto_tfm_alg_blocksize(tfm);
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ivsize = crypto_ablkcipher_ivsize(cipher);
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if (block == DES_BLOCK_SIZE) {
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ctx->mode |= RK_CRYPTO_TDES_FIFO_MODE |
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RK_CRYPTO_TDES_BYTESWAP_KEY |
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RK_CRYPTO_TDES_BYTESWAP_IV;
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CRYPTO_WRITE(dev, RK_CRYPTO_TDES_CTRL, ctx->mode);
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memcpy_toio(dev->reg + RK_CRYPTO_TDES_IV_0, req->info, ivsize);
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conf_reg = RK_CRYPTO_DESSEL;
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} else {
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ctx->mode |= RK_CRYPTO_AES_FIFO_MODE |
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RK_CRYPTO_AES_KEY_CHANGE |
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RK_CRYPTO_AES_BYTESWAP_KEY |
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RK_CRYPTO_AES_BYTESWAP_IV;
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if (ctx->keylen == AES_KEYSIZE_192)
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ctx->mode |= RK_CRYPTO_AES_192BIT_key;
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else if (ctx->keylen == AES_KEYSIZE_256)
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ctx->mode |= RK_CRYPTO_AES_256BIT_key;
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CRYPTO_WRITE(dev, RK_CRYPTO_AES_CTRL, ctx->mode);
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memcpy_toio(dev->reg + RK_CRYPTO_AES_IV_0, req->info, ivsize);
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}
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conf_reg |= RK_CRYPTO_BYTESWAP_BTFIFO |
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RK_CRYPTO_BYTESWAP_BRFIFO;
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CRYPTO_WRITE(dev, RK_CRYPTO_CONF, conf_reg);
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CRYPTO_WRITE(dev, RK_CRYPTO_INTENA,
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RK_CRYPTO_BCDMA_ERR_ENA | RK_CRYPTO_BCDMA_DONE_ENA);
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}
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static void crypto_dma_start(struct rk_crypto_info *dev)
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{
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CRYPTO_WRITE(dev, RK_CRYPTO_BRDMAS, dev->addr_in);
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CRYPTO_WRITE(dev, RK_CRYPTO_BRDMAL, dev->count / 4);
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CRYPTO_WRITE(dev, RK_CRYPTO_BTDMAS, dev->addr_out);
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CRYPTO_WRITE(dev, RK_CRYPTO_CTRL, RK_CRYPTO_BLOCK_START |
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_SBF(RK_CRYPTO_BLOCK_START, 16));
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}
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static int rk_set_data_start(struct rk_crypto_info *dev)
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{
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int err;
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err = dev->load_data(dev, dev->sg_src, dev->sg_dst);
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if (!err)
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crypto_dma_start(dev);
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return err;
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}
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static int rk_ablk_start(struct rk_crypto_info *dev)
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{
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struct ablkcipher_request *req =
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ablkcipher_request_cast(dev->async_req);
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unsigned long flags;
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int err = 0;
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dev->left_bytes = req->nbytes;
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dev->total = req->nbytes;
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dev->sg_src = req->src;
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dev->first = req->src;
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dev->nents = sg_nents(req->src);
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dev->sg_dst = req->dst;
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dev->aligned = 1;
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spin_lock_irqsave(&dev->lock, flags);
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rk_ablk_hw_init(dev);
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err = rk_set_data_start(dev);
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spin_unlock_irqrestore(&dev->lock, flags);
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return err;
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}
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static void rk_iv_copyback(struct rk_crypto_info *dev)
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{
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struct ablkcipher_request *req =
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ablkcipher_request_cast(dev->async_req);
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struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
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u32 ivsize = crypto_ablkcipher_ivsize(tfm);
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if (ivsize == DES_BLOCK_SIZE)
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memcpy_fromio(req->info, dev->reg + RK_CRYPTO_TDES_IV_0,
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ivsize);
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else if (ivsize == AES_BLOCK_SIZE)
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memcpy_fromio(req->info, dev->reg + RK_CRYPTO_AES_IV_0, ivsize);
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}
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/* return:
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* true some err was occurred
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* fault no err, continue
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*/
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static int rk_ablk_rx(struct rk_crypto_info *dev)
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{
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int err = 0;
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struct ablkcipher_request *req =
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ablkcipher_request_cast(dev->async_req);
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dev->unload_data(dev);
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if (!dev->aligned) {
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if (!sg_pcopy_from_buffer(req->dst, dev->nents,
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dev->addr_vir, dev->count,
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dev->total - dev->left_bytes -
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dev->count)) {
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err = -EINVAL;
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goto out_rx;
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}
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}
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if (dev->left_bytes) {
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if (dev->aligned) {
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if (sg_is_last(dev->sg_src)) {
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dev_err(dev->dev, "[%s:%d] Lack of data\n",
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__func__, __LINE__);
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err = -ENOMEM;
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goto out_rx;
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}
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dev->sg_src = sg_next(dev->sg_src);
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dev->sg_dst = sg_next(dev->sg_dst);
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}
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err = rk_set_data_start(dev);
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} else {
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rk_iv_copyback(dev);
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/* here show the calculation is over without any err */
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dev->complete(dev->async_req, 0);
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tasklet_schedule(&dev->queue_task);
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}
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out_rx:
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return err;
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}
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static int rk_ablk_cra_init(struct crypto_tfm *tfm)
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{
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struct rk_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
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struct crypto_alg *alg = tfm->__crt_alg;
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struct rk_crypto_tmp *algt;
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algt = container_of(alg, struct rk_crypto_tmp, alg.crypto);
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||
|
|
|
||
|
|
ctx->dev = algt->dev;
|
||
|
|
ctx->dev->align_size = crypto_tfm_alg_alignmask(tfm) + 1;
|
||
|
|
ctx->dev->start = rk_ablk_start;
|
||
|
|
ctx->dev->update = rk_ablk_rx;
|
||
|
|
ctx->dev->complete = rk_crypto_complete;
|
||
|
|
ctx->dev->addr_vir = (char *)__get_free_page(GFP_KERNEL);
|
||
|
|
|
||
|
|
return ctx->dev->addr_vir ? ctx->dev->enable_clk(ctx->dev) : -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void rk_ablk_cra_exit(struct crypto_tfm *tfm)
|
||
|
|
{
|
||
|
|
struct rk_cipher_ctx *ctx = crypto_tfm_ctx(tfm);
|
||
|
|
|
||
|
|
free_page((unsigned long)ctx->dev->addr_vir);
|
||
|
|
ctx->dev->disable_clk(ctx->dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
struct rk_crypto_tmp rk_ecb_aes_alg = {
|
||
|
|
.type = ALG_TYPE_CIPHER,
|
||
|
|
.alg.crypto = {
|
||
|
|
.cra_name = "ecb(aes)",
|
||
|
|
.cra_driver_name = "ecb-aes-rk",
|
||
|
|
.cra_priority = 300,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
|
||
|
|
CRYPTO_ALG_ASYNC,
|
||
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct rk_cipher_ctx),
|
||
|
|
.cra_alignmask = 0x0f,
|
||
|
|
.cra_type = &crypto_ablkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_init = rk_ablk_cra_init,
|
||
|
|
.cra_exit = rk_ablk_cra_exit,
|
||
|
|
.cra_u.ablkcipher = {
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
.setkey = rk_aes_setkey,
|
||
|
|
.encrypt = rk_aes_ecb_encrypt,
|
||
|
|
.decrypt = rk_aes_ecb_decrypt,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct rk_crypto_tmp rk_cbc_aes_alg = {
|
||
|
|
.type = ALG_TYPE_CIPHER,
|
||
|
|
.alg.crypto = {
|
||
|
|
.cra_name = "cbc(aes)",
|
||
|
|
.cra_driver_name = "cbc-aes-rk",
|
||
|
|
.cra_priority = 300,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
|
||
|
|
CRYPTO_ALG_ASYNC,
|
||
|
|
.cra_blocksize = AES_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct rk_cipher_ctx),
|
||
|
|
.cra_alignmask = 0x0f,
|
||
|
|
.cra_type = &crypto_ablkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_init = rk_ablk_cra_init,
|
||
|
|
.cra_exit = rk_ablk_cra_exit,
|
||
|
|
.cra_u.ablkcipher = {
|
||
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
||
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
||
|
|
.ivsize = AES_BLOCK_SIZE,
|
||
|
|
.setkey = rk_aes_setkey,
|
||
|
|
.encrypt = rk_aes_cbc_encrypt,
|
||
|
|
.decrypt = rk_aes_cbc_decrypt,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct rk_crypto_tmp rk_ecb_des_alg = {
|
||
|
|
.type = ALG_TYPE_CIPHER,
|
||
|
|
.alg.crypto = {
|
||
|
|
.cra_name = "ecb(des)",
|
||
|
|
.cra_driver_name = "ecb-des-rk",
|
||
|
|
.cra_priority = 300,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
|
||
|
|
CRYPTO_ALG_ASYNC,
|
||
|
|
.cra_blocksize = DES_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct rk_cipher_ctx),
|
||
|
|
.cra_alignmask = 0x07,
|
||
|
|
.cra_type = &crypto_ablkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_init = rk_ablk_cra_init,
|
||
|
|
.cra_exit = rk_ablk_cra_exit,
|
||
|
|
.cra_u.ablkcipher = {
|
||
|
|
.min_keysize = DES_KEY_SIZE,
|
||
|
|
.max_keysize = DES_KEY_SIZE,
|
||
|
|
.setkey = rk_tdes_setkey,
|
||
|
|
.encrypt = rk_des_ecb_encrypt,
|
||
|
|
.decrypt = rk_des_ecb_decrypt,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct rk_crypto_tmp rk_cbc_des_alg = {
|
||
|
|
.type = ALG_TYPE_CIPHER,
|
||
|
|
.alg.crypto = {
|
||
|
|
.cra_name = "cbc(des)",
|
||
|
|
.cra_driver_name = "cbc-des-rk",
|
||
|
|
.cra_priority = 300,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
|
||
|
|
CRYPTO_ALG_ASYNC,
|
||
|
|
.cra_blocksize = DES_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct rk_cipher_ctx),
|
||
|
|
.cra_alignmask = 0x07,
|
||
|
|
.cra_type = &crypto_ablkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_init = rk_ablk_cra_init,
|
||
|
|
.cra_exit = rk_ablk_cra_exit,
|
||
|
|
.cra_u.ablkcipher = {
|
||
|
|
.min_keysize = DES_KEY_SIZE,
|
||
|
|
.max_keysize = DES_KEY_SIZE,
|
||
|
|
.ivsize = DES_BLOCK_SIZE,
|
||
|
|
.setkey = rk_tdes_setkey,
|
||
|
|
.encrypt = rk_des_cbc_encrypt,
|
||
|
|
.decrypt = rk_des_cbc_decrypt,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct rk_crypto_tmp rk_ecb_des3_ede_alg = {
|
||
|
|
.type = ALG_TYPE_CIPHER,
|
||
|
|
.alg.crypto = {
|
||
|
|
.cra_name = "ecb(des3_ede)",
|
||
|
|
.cra_driver_name = "ecb-des3-ede-rk",
|
||
|
|
.cra_priority = 300,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
|
||
|
|
CRYPTO_ALG_ASYNC,
|
||
|
|
.cra_blocksize = DES_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct rk_cipher_ctx),
|
||
|
|
.cra_alignmask = 0x07,
|
||
|
|
.cra_type = &crypto_ablkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_init = rk_ablk_cra_init,
|
||
|
|
.cra_exit = rk_ablk_cra_exit,
|
||
|
|
.cra_u.ablkcipher = {
|
||
|
|
.min_keysize = DES3_EDE_KEY_SIZE,
|
||
|
|
.max_keysize = DES3_EDE_KEY_SIZE,
|
||
|
|
.ivsize = DES_BLOCK_SIZE,
|
||
|
|
.setkey = rk_tdes_setkey,
|
||
|
|
.encrypt = rk_des3_ede_ecb_encrypt,
|
||
|
|
.decrypt = rk_des3_ede_ecb_decrypt,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
struct rk_crypto_tmp rk_cbc_des3_ede_alg = {
|
||
|
|
.type = ALG_TYPE_CIPHER,
|
||
|
|
.alg.crypto = {
|
||
|
|
.cra_name = "cbc(des3_ede)",
|
||
|
|
.cra_driver_name = "cbc-des3-ede-rk",
|
||
|
|
.cra_priority = 300,
|
||
|
|
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
|
||
|
|
CRYPTO_ALG_ASYNC,
|
||
|
|
.cra_blocksize = DES_BLOCK_SIZE,
|
||
|
|
.cra_ctxsize = sizeof(struct rk_cipher_ctx),
|
||
|
|
.cra_alignmask = 0x07,
|
||
|
|
.cra_type = &crypto_ablkcipher_type,
|
||
|
|
.cra_module = THIS_MODULE,
|
||
|
|
.cra_init = rk_ablk_cra_init,
|
||
|
|
.cra_exit = rk_ablk_cra_exit,
|
||
|
|
.cra_u.ablkcipher = {
|
||
|
|
.min_keysize = DES3_EDE_KEY_SIZE,
|
||
|
|
.max_keysize = DES3_EDE_KEY_SIZE,
|
||
|
|
.ivsize = DES_BLOCK_SIZE,
|
||
|
|
.setkey = rk_tdes_setkey,
|
||
|
|
.encrypt = rk_des3_ede_cbc_encrypt,
|
||
|
|
.decrypt = rk_des3_ede_cbc_decrypt,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|