mirror of https://gitee.com/openkylin/linux.git
295 lines
8.2 KiB
C
295 lines
8.2 KiB
C
/**
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* AMCC SoC PPC4xx Crypto Driver
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*
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* Copyright (c) 2008 Applied Micro Circuits Corporation.
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* All rights reserved. James Hsiao <jhsiao@amcc.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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This file implements the Linux crypto algorithms.
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*/
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock_types.h>
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#include <linux/scatterlist.h>
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#include <linux/crypto.h>
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#include <linux/hash.h>
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#include <crypto/internal/hash.h>
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#include <linux/dma-mapping.h>
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#include <crypto/algapi.h>
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#include <crypto/aes.h>
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#include <crypto/sha.h>
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#include "crypto4xx_reg_def.h"
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#include "crypto4xx_sa.h"
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#include "crypto4xx_core.h"
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void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h,
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u32 save_iv, u32 ld_h, u32 ld_iv, u32 hdr_proc,
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u32 h, u32 c, u32 pad_type, u32 op_grp, u32 op,
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u32 dir)
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{
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sa->sa_command_0.w = 0;
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sa->sa_command_0.bf.save_hash_state = save_h;
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sa->sa_command_0.bf.save_iv = save_iv;
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sa->sa_command_0.bf.load_hash_state = ld_h;
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sa->sa_command_0.bf.load_iv = ld_iv;
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sa->sa_command_0.bf.hdr_proc = hdr_proc;
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sa->sa_command_0.bf.hash_alg = h;
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sa->sa_command_0.bf.cipher_alg = c;
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sa->sa_command_0.bf.pad_type = pad_type & 3;
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sa->sa_command_0.bf.extend_pad = pad_type >> 2;
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sa->sa_command_0.bf.op_group = op_grp;
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sa->sa_command_0.bf.opcode = op;
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sa->sa_command_0.bf.dir = dir;
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}
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void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm, u32 hmac_mc,
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u32 cfb, u32 esn, u32 sn_mask, u32 mute,
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u32 cp_pad, u32 cp_pay, u32 cp_hdr)
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{
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sa->sa_command_1.w = 0;
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sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2;
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sa->sa_command_1.bf.crypto_mode9_8 = cm & 3;
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sa->sa_command_1.bf.feedback_mode = cfb,
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sa->sa_command_1.bf.sa_rev = 1;
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sa->sa_command_1.bf.extended_seq_num = esn;
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sa->sa_command_1.bf.seq_num_mask = sn_mask;
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sa->sa_command_1.bf.mutable_bit_proc = mute;
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sa->sa_command_1.bf.copy_pad = cp_pad;
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sa->sa_command_1.bf.copy_payload = cp_pay;
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sa->sa_command_1.bf.copy_hdr = cp_hdr;
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}
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int crypto4xx_encrypt(struct ablkcipher_request *req)
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{
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struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
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ctx->direction = DIR_OUTBOUND;
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ctx->hash_final = 0;
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ctx->is_hash = 0;
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ctx->pd_ctl = 0x1;
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return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
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req->nbytes, req->info,
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get_dynamic_sa_iv_size(ctx));
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}
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int crypto4xx_decrypt(struct ablkcipher_request *req)
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{
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struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
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ctx->direction = DIR_INBOUND;
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ctx->hash_final = 0;
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ctx->is_hash = 0;
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ctx->pd_ctl = 1;
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return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
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req->nbytes, req->info,
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get_dynamic_sa_iv_size(ctx));
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}
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/**
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* AES Functions
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*/
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static int crypto4xx_setkey_aes(struct crypto_ablkcipher *cipher,
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const u8 *key,
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unsigned int keylen,
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unsigned char cm,
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u8 fb)
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{
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struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
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struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
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struct dynamic_sa_ctl *sa;
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int rc;
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if (keylen != AES_KEYSIZE_256 &&
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keylen != AES_KEYSIZE_192 && keylen != AES_KEYSIZE_128) {
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crypto_ablkcipher_set_flags(cipher,
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CRYPTO_TFM_RES_BAD_KEY_LEN);
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return -EINVAL;
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}
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/* Create SA */
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if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
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crypto4xx_free_sa(ctx);
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rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4);
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if (rc)
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return rc;
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if (ctx->state_record_dma_addr == 0) {
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rc = crypto4xx_alloc_state_record(ctx);
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if (rc) {
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crypto4xx_free_sa(ctx);
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return rc;
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}
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}
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/* Setup SA */
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sa = (struct dynamic_sa_ctl *) ctx->sa_in;
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ctx->hash_final = 0;
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set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, SA_NOT_SAVE_IV,
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SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE,
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SA_NO_HEADER_PROC, SA_HASH_ALG_NULL,
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SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO,
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SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT,
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DIR_INBOUND);
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set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH,
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fb, SA_EXTENDED_SN_OFF,
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SA_SEQ_MASK_OFF, SA_MC_ENABLE,
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SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
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SA_NOT_COPY_HDR);
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crypto4xx_memcpy_le(ctx->sa_in + get_dynamic_sa_offset_key_field(ctx),
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key, keylen);
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sa->sa_contents = SA_AES_CONTENTS | (keylen << 2);
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sa->sa_command_1.bf.key_len = keylen >> 3;
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ctx->is_hash = 0;
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ctx->direction = DIR_INBOUND;
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memcpy(ctx->sa_in + get_dynamic_sa_offset_state_ptr_field(ctx),
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(void *)&ctx->state_record_dma_addr, 4);
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ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx);
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memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
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sa = (struct dynamic_sa_ctl *) ctx->sa_out;
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sa->sa_command_0.bf.dir = DIR_OUTBOUND;
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return 0;
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}
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int crypto4xx_setkey_aes_cbc(struct crypto_ablkcipher *cipher,
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const u8 *key, unsigned int keylen)
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{
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return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC,
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CRYPTO_FEEDBACK_MODE_NO_FB);
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}
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/**
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* HASH SHA1 Functions
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*/
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static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm,
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unsigned int sa_len,
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unsigned char ha,
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unsigned char hm)
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{
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struct crypto_alg *alg = tfm->__crt_alg;
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struct crypto4xx_alg *my_alg = crypto_alg_to_crypto4xx_alg(alg);
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struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
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struct dynamic_sa_ctl *sa;
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struct dynamic_sa_hash160 *sa_in;
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int rc;
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ctx->dev = my_alg->dev;
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ctx->is_hash = 1;
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ctx->hash_final = 0;
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/* Create SA */
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if (ctx->sa_in_dma_addr || ctx->sa_out_dma_addr)
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crypto4xx_free_sa(ctx);
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rc = crypto4xx_alloc_sa(ctx, sa_len);
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if (rc)
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return rc;
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if (ctx->state_record_dma_addr == 0) {
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crypto4xx_alloc_state_record(ctx);
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if (!ctx->state_record_dma_addr) {
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crypto4xx_free_sa(ctx);
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return -ENOMEM;
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}
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}
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crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
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sizeof(struct crypto4xx_ctx));
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sa = (struct dynamic_sa_ctl *) ctx->sa_in;
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set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV,
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SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA,
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SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL,
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SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
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SA_OPCODE_HASH, DIR_INBOUND);
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set_dynamic_sa_command_1(sa, 0, SA_HASH_MODE_HASH,
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CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF,
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SA_SEQ_MASK_OFF, SA_MC_ENABLE,
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SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD,
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SA_NOT_COPY_HDR);
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ctx->direction = DIR_INBOUND;
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sa->sa_contents = SA_HASH160_CONTENTS;
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sa_in = (struct dynamic_sa_hash160 *) ctx->sa_in;
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/* Need to zero hash digest in SA */
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memset(sa_in->inner_digest, 0, sizeof(sa_in->inner_digest));
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memset(sa_in->outer_digest, 0, sizeof(sa_in->outer_digest));
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sa_in->state_ptr = ctx->state_record_dma_addr;
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ctx->offset_to_sr_ptr = get_dynamic_sa_offset_state_ptr_field(ctx);
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return 0;
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}
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int crypto4xx_hash_init(struct ahash_request *req)
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{
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struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
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int ds;
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struct dynamic_sa_ctl *sa;
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sa = (struct dynamic_sa_ctl *) ctx->sa_in;
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ds = crypto_ahash_digestsize(
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__crypto_ahash_cast(req->base.tfm));
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sa->sa_command_0.bf.digest_len = ds >> 2;
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sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA;
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ctx->is_hash = 1;
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ctx->direction = DIR_INBOUND;
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return 0;
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}
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int crypto4xx_hash_update(struct ahash_request *req)
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{
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struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
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ctx->is_hash = 1;
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ctx->hash_final = 0;
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ctx->pd_ctl = 0x11;
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ctx->direction = DIR_INBOUND;
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return crypto4xx_build_pd(&req->base, ctx, req->src,
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(struct scatterlist *) req->result,
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req->nbytes, NULL, 0);
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}
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int crypto4xx_hash_final(struct ahash_request *req)
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{
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return 0;
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}
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int crypto4xx_hash_digest(struct ahash_request *req)
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{
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struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
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ctx->hash_final = 1;
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ctx->pd_ctl = 0x11;
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ctx->direction = DIR_INBOUND;
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return crypto4xx_build_pd(&req->base, ctx, req->src,
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(struct scatterlist *) req->result,
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req->nbytes, NULL, 0);
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}
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/**
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* SHA1 Algorithm
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*/
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int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm)
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{
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return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1,
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SA_HASH_MODE_HASH);
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}
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