diff options
Diffstat (limited to 'drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c')
| -rw-r--r-- | drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c | 66 |
1 files changed, 43 insertions, 23 deletions
diff --git a/drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c b/drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c index 02dac6ae7e53..96078aaa2098 100644 --- a/drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c +++ b/drivers/crypto/rockchip/rk3288_crypto_ablkcipher.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Crypto acceleration support for Rockchip RK3288 * @@ -5,10 +6,6 @@ * * Author: Zain Wang <zain.wang@rock-chips.com> * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * * Some ideas are from marvell-cesa.c and s5p-sss.c driver. */ #include "rk3288_crypto.h" @@ -46,24 +43,36 @@ static int rk_aes_setkey(struct crypto_ablkcipher *cipher, return 0; } -static int rk_tdes_setkey(struct crypto_ablkcipher *cipher, - const u8 *key, unsigned int keylen) +static int rk_des_setkey(struct crypto_ablkcipher *cipher, + const u8 *key, unsigned int keylen) { struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher); struct rk_cipher_ctx *ctx = crypto_tfm_ctx(tfm); u32 tmp[DES_EXPKEY_WORDS]; - if (keylen != DES_KEY_SIZE && keylen != DES3_EDE_KEY_SIZE) { - crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); + if (!des_ekey(tmp, key) && + (tfm->crt_flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) { + tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; return -EINVAL; } - if (keylen == DES_KEY_SIZE) { - if (!des_ekey(tmp, key) && - (tfm->crt_flags & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) { - tfm->crt_flags |= CRYPTO_TFM_RES_WEAK_KEY; - return -EINVAL; - } + ctx->keylen = keylen; + memcpy_toio(ctx->dev->reg + RK_CRYPTO_TDES_KEY1_0, key, keylen); + return 0; +} + +static int rk_tdes_setkey(struct crypto_ablkcipher *cipher, + const u8 *key, unsigned int keylen) +{ + struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(cipher); + u32 flags; + int err; + + flags = crypto_ablkcipher_get_flags(cipher); + err = __des3_verify_key(&flags, key); + if (unlikely(err)) { + crypto_ablkcipher_set_flags(cipher, flags); + return err; } ctx->keylen = keylen; @@ -250,9 +259,14 @@ static int rk_set_data_start(struct rk_crypto_info *dev) u8 *src_last_blk = page_address(sg_page(dev->sg_src)) + dev->sg_src->offset + dev->sg_src->length - ivsize; - /* store the iv that need to be updated in chain mode */ - if (ctx->mode & RK_CRYPTO_DEC) + /* Store the iv that need to be updated in chain mode. + * And update the IV buffer to contain the next IV for decryption mode. + */ + if (ctx->mode & RK_CRYPTO_DEC) { memcpy(ctx->iv, src_last_blk, ivsize); + sg_pcopy_to_buffer(dev->first, dev->src_nents, req->info, + ivsize, dev->total - ivsize); + } err = dev->load_data(dev, dev->sg_src, dev->sg_dst); if (!err) @@ -288,13 +302,19 @@ static void rk_iv_copyback(struct rk_crypto_info *dev) struct ablkcipher_request *req = ablkcipher_request_cast(dev->async_req); struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); + struct rk_cipher_ctx *ctx = crypto_ablkcipher_ctx(tfm); u32 ivsize = crypto_ablkcipher_ivsize(tfm); - if (ivsize == DES_BLOCK_SIZE) - memcpy_fromio(req->info, dev->reg + RK_CRYPTO_TDES_IV_0, - ivsize); - else if (ivsize == AES_BLOCK_SIZE) - memcpy_fromio(req->info, dev->reg + RK_CRYPTO_AES_IV_0, ivsize); + /* Update the IV buffer to contain the next IV for encryption mode. */ + if (!(ctx->mode & RK_CRYPTO_DEC)) { + if (dev->aligned) { + memcpy(req->info, sg_virt(dev->sg_dst) + + dev->sg_dst->length - ivsize, ivsize); + } else { + memcpy(req->info, dev->addr_vir + + dev->count - ivsize, ivsize); + } + } } static void rk_update_iv(struct rk_crypto_info *dev) @@ -457,7 +477,7 @@ struct rk_crypto_tmp rk_ecb_des_alg = { .cra_u.ablkcipher = { .min_keysize = DES_KEY_SIZE, .max_keysize = DES_KEY_SIZE, - .setkey = rk_tdes_setkey, + .setkey = rk_des_setkey, .encrypt = rk_des_ecb_encrypt, .decrypt = rk_des_ecb_decrypt, } @@ -483,7 +503,7 @@ struct rk_crypto_tmp rk_cbc_des_alg = { .min_keysize = DES_KEY_SIZE, .max_keysize = DES_KEY_SIZE, .ivsize = DES_BLOCK_SIZE, - .setkey = rk_tdes_setkey, + .setkey = rk_des_setkey, .encrypt = rk_des_cbc_encrypt, .decrypt = rk_des_cbc_decrypt, } |