// SPDX-License-Identifier: GPL-2.0-or-later
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/**
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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 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/aead.h>
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#include <crypto/aes.h>
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#include <crypto/gcm.h>
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#include <crypto/sha.h>
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#include <crypto/ctr.h>
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#include <crypto/skcipher.h>
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#include "crypto4xx_reg_def.h"
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#include "crypto4xx_core.h"
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#include "crypto4xx_sa.h"
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static 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,
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u32 hdr_proc, u32 h, u32 c, u32 pad_type,
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u32 op_grp, u32 op, 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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static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm,
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u32 hmac_mc, u32 cfb, u32 esn,
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u32 sn_mask, u32 mute, u32 cp_pad,
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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.hmac_muting = hmac_mc;
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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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static inline int crypto4xx_crypt(struct skcipher_request *req,
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const unsigned int ivlen, bool decrypt,
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bool check_blocksize)
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{
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struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
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struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
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__le32 iv[AES_IV_SIZE];
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if (check_blocksize && !IS_ALIGNED(req->cryptlen, AES_BLOCK_SIZE))
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return -EINVAL;
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if (ivlen)
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crypto4xx_memcpy_to_le32(iv, req->iv, ivlen);
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return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
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req->cryptlen, iv, ivlen, decrypt ? ctx->sa_in : ctx->sa_out,
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ctx->sa_len, 0, NULL);
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}
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int crypto4xx_encrypt_noiv_block(struct skcipher_request *req)
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{
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return crypto4xx_crypt(req, 0, false, true);
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}
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int crypto4xx_encrypt_iv_stream(struct skcipher_request *req)
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{
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return crypto4xx_crypt(req, AES_IV_SIZE, false, false);
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}
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int crypto4xx_decrypt_noiv_block(struct skcipher_request *req)
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{
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return crypto4xx_crypt(req, 0, true, true);
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}
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int crypto4xx_decrypt_iv_stream(struct skcipher_request *req)
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{
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return crypto4xx_crypt(req, AES_IV_SIZE, true, false);
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}
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int crypto4xx_encrypt_iv_block(struct skcipher_request *req)
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{
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return crypto4xx_crypt(req, AES_IV_SIZE, false, true);
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}
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int crypto4xx_decrypt_iv_block(struct skcipher_request *req)
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{
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return crypto4xx_crypt(req, AES_IV_SIZE, true, true);
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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_skcipher *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 crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
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struct dynamic_sa_ctl *sa;
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int rc;
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if (keylen != AES_KEYSIZE_256 && keylen != AES_KEYSIZE_192 &&
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keylen != AES_KEYSIZE_128)
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return -EINVAL;
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/* Create SA */
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if (ctx->sa_in || ctx->sa_out)
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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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/* Setup SA */
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sa = ctx->sa_in;
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set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, (cm == CRYPTO_MODE_ECB ?
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SA_NOT_SAVE_IV : SA_SAVE_IV),
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SA_NOT_LOAD_HASH, (cm == CRYPTO_MODE_ECB ?
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SA_LOAD_IV_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_to_le32(get_dynamic_sa_key_field(sa),
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key, keylen);
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sa->sa_contents.w = SA_AES_CONTENTS | (keylen << 2);
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sa->sa_command_1.bf.key_len = keylen >> 3;
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memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4);
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sa = ctx->sa_out;
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sa->sa_command_0.bf.dir = DIR_OUTBOUND;
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/*
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* SA_OPCODE_ENCRYPT is the same value as SA_OPCODE_DECRYPT.
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* it's the DIR_(IN|OUT)BOUND that matters
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*/
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sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT;
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return 0;
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}
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int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *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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int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *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_CFB,
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CRYPTO_FEEDBACK_MODE_128BIT_CFB);
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}
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int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *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_ECB,
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CRYPTO_FEEDBACK_MODE_NO_FB);
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}
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int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *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_OFB,
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CRYPTO_FEEDBACK_MODE_64BIT_OFB);
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}
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int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher,
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const u8 *key, unsigned int keylen)
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{
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struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
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int rc;
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rc = crypto4xx_setkey_aes(cipher, key, keylen - CTR_RFC3686_NONCE_SIZE,
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CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
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if (rc)
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return rc;
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ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen -
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CTR_RFC3686_NONCE_SIZE]);
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return 0;
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}
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int crypto4xx_rfc3686_encrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
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struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
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__le32 iv[AES_IV_SIZE / 4] = {
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ctx->iv_nonce,
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cpu_to_le32p((u32 *) req->iv),
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cpu_to_le32p((u32 *) (req->iv + 4)),
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cpu_to_le32(1) };
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return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
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req->cryptlen, iv, AES_IV_SIZE,
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ctx->sa_out, ctx->sa_len, 0, NULL);
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}
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int crypto4xx_rfc3686_decrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
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struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
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__le32 iv[AES_IV_SIZE / 4] = {
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ctx->iv_nonce,
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cpu_to_le32p((u32 *) req->iv),
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cpu_to_le32p((u32 *) (req->iv + 4)),
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cpu_to_le32(1) };
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return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
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req->cryptlen, iv, AES_IV_SIZE,
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ctx->sa_out, ctx->sa_len, 0, NULL);
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}
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static int
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crypto4xx_ctr_crypt(struct skcipher_request *req, bool encrypt)
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{
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struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req);
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struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
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size_t iv_len = crypto_skcipher_ivsize(cipher);
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unsigned int counter = be32_to_cpup((__be32 *)(req->iv + iv_len - 4));
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unsigned int nblks = ALIGN(req->cryptlen, AES_BLOCK_SIZE) /
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AES_BLOCK_SIZE;
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/*
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* The hardware uses only the last 32-bits as the counter while the
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* kernel tests (aes_ctr_enc_tv_template[4] for example) expect that
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* the whole IV is a counter. So fallback if the counter is going to
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* overlow.
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*/
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if (counter + nblks < counter) {
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SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->sw_cipher.cipher);
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int ret;
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skcipher_request_set_sync_tfm(subreq, ctx->sw_cipher.cipher);
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skcipher_request_set_callback(subreq, req->base.flags,
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NULL, NULL);
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skcipher_request_set_crypt(subreq, req->src, req->dst,
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req->cryptlen, req->iv);
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ret = encrypt ? crypto_skcipher_encrypt(subreq)
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: crypto_skcipher_decrypt(subreq);
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skcipher_request_zero(subreq);
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return ret;
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}
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return encrypt ? crypto4xx_encrypt_iv_stream(req)
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: crypto4xx_decrypt_iv_stream(req);
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}
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static int crypto4xx_sk_setup_fallback(struct crypto4xx_ctx *ctx,
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struct crypto_skcipher *cipher,
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const u8 *key,
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unsigned int keylen)
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{
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crypto_sync_skcipher_clear_flags(ctx->sw_cipher.cipher,
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CRYPTO_TFM_REQ_MASK);
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crypto_sync_skcipher_set_flags(ctx->sw_cipher.cipher,
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crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
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return crypto_sync_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen);
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}
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int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher,
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const u8 *key, unsigned int keylen)
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{
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struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher);
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int rc;
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rc = crypto4xx_sk_setup_fallback(ctx, cipher, key, keylen);
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if (rc)
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return rc;
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return crypto4xx_setkey_aes(cipher, key, keylen,
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CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB);
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}
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int crypto4xx_encrypt_ctr(struct skcipher_request *req)
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{
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return crypto4xx_ctr_crypt(req, true);
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}
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int crypto4xx_decrypt_ctr(struct skcipher_request *req)
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{
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return crypto4xx_ctr_crypt(req, false);
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}
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static inline bool crypto4xx_aead_need_fallback(struct aead_request *req,
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unsigned int len,
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bool is_ccm, bool decrypt)
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{
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struct crypto_aead *aead = crypto_aead_reqtfm(req);
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/* authsize has to be a multiple of 4 */
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if (aead->authsize & 3)
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return true;
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/*
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* hardware does not handle cases where plaintext
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* is less than a block.
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*/
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if (len < AES_BLOCK_SIZE)
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return true;
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/* assoc len needs to be a multiple of 4 and <= 1020 */
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if (req->assoclen & 0x3 || req->assoclen > 1020)
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return true;
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/* CCM supports only counter field length of 2 and 4 bytes */
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if (is_ccm && !(req->iv[0] == 1 || req->iv[0] == 3))
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return true;
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return false;
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}
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static int crypto4xx_aead_fallback(struct aead_request *req,
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struct crypto4xx_ctx *ctx, bool do_decrypt)
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{
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struct aead_request *subreq = aead_request_ctx(req);
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aead_request_set_tfm(subreq, ctx->sw_cipher.aead);
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aead_request_set_callback(subreq, req->base.flags,
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req->base.complete, req->base.data);
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aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen,
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req->iv);
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aead_request_set_ad(subreq, req->assoclen);
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return do_decrypt ? crypto_aead_decrypt(subreq) :
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crypto_aead_encrypt(subreq);
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}
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static int crypto4xx_aead_setup_fallback(struct crypto4xx_ctx *ctx,
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struct crypto_aead *cipher,
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const u8 *key,
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unsigned int keylen)
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{
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crypto_aead_clear_flags(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK);
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crypto_aead_set_flags(ctx->sw_cipher.aead,
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crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
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return crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen);
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}
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/**
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* AES-CCM Functions
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*/
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int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key,
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unsigned int keylen)
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{
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struct crypto_tfm *tfm = crypto_aead_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 = 0;
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rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen);
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if (rc)
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return rc;
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if (ctx->sa_in || ctx->sa_out)
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crypto4xx_free_sa(ctx);
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rc = crypto4xx_alloc_sa(ctx, SA_AES128_CCM_LEN + (keylen - 16) / 4);
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if (rc)
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return rc;
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/* Setup SA */
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sa = (struct dynamic_sa_ctl *) ctx->sa_in;
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sa->sa_contents.w = SA_AES_CCM_CONTENTS | (keylen << 2);
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set_dynamic_sa_command_0(sa, SA_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_CBC_MAC,
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SA_CIPHER_ALG_AES,
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SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
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SA_OPCODE_HASH_DECRYPT, DIR_INBOUND);
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set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, 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_COPY_PAYLOAD,
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SA_NOT_COPY_HDR);
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sa->sa_command_1.bf.key_len = keylen >> 3;
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crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), key, keylen);
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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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set_dynamic_sa_command_0(sa, SA_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_CBC_MAC,
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SA_CIPHER_ALG_AES,
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SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC,
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SA_OPCODE_ENCRYPT_HASH, DIR_OUTBOUND);
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set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, 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_COPY_PAD, SA_COPY_PAYLOAD,
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SA_NOT_COPY_HDR);
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sa->sa_command_1.bf.key_len = keylen >> 3;
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return 0;
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}
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static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt)
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{
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struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
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struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req);
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struct crypto_aead *aead = crypto_aead_reqtfm(req);
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__le32 iv[16];
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u32 tmp_sa[SA_AES128_CCM_LEN + 4];
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struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa;
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unsigned int len = req->cryptlen;
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if (decrypt)
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len -= crypto_aead_authsize(aead);
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if (crypto4xx_aead_need_fallback(req, len, true, decrypt))
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return crypto4xx_aead_fallback(req, ctx, decrypt);
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memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, ctx->sa_len * 4);
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sa->sa_command_0.bf.digest_len = crypto_aead_authsize(aead) >> 2;
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if (req->iv[0] == 1) {
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/* CRYPTO_MODE_AES_ICM */
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sa->sa_command_1.bf.crypto_mode9_8 = 1;
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}
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iv[3] = cpu_to_le32(0);
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crypto4xx_memcpy_to_le32(iv, req->iv, 16 - (req->iv[0] + 1));
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return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst,
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len, iv, sizeof(iv),
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sa, ctx->sa_len, req->assoclen, rctx->dst);
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}
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int crypto4xx_encrypt_aes_ccm(struct aead_request *req)
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{
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return crypto4xx_crypt_aes_ccm(req, false);
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}
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int crypto4xx_decrypt_aes_ccm(struct aead_request *req)
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{
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return crypto4xx_crypt_aes_ccm(req, true);
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}
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int crypto4xx_setauthsize_aead(struct crypto_aead *cipher,
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unsigned int authsize)
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{
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struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
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struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
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return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize);
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}
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/**
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* AES-GCM Functions
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*/
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static int crypto4xx_aes_gcm_validate_keylen(unsigned int keylen)
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{
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switch (keylen) {
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case 16:
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case 24:
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case 32:
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return 0;
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default:
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return -EINVAL;
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}
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}
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static int crypto4xx_compute_gcm_hash_key_sw(__le32 *hash_start, const u8 *key,
|
unsigned int keylen)
|
{
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struct crypto_aes_ctx ctx;
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uint8_t src[16] = { 0 };
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int rc;
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rc = aes_expandkey(&ctx, key, keylen);
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if (rc) {
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pr_err("aes_expandkey() failed: %d\n", rc);
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return rc;
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}
|
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aes_encrypt(&ctx, src, src);
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crypto4xx_memcpy_to_le32(hash_start, src, 16);
|
memzero_explicit(&ctx, sizeof(ctx));
|
return 0;
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}
|
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int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher,
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const u8 *key, unsigned int keylen)
|
{
|
struct crypto_tfm *tfm = crypto_aead_tfm(cipher);
|
struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm);
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struct dynamic_sa_ctl *sa;
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int rc = 0;
|
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if (crypto4xx_aes_gcm_validate_keylen(keylen) != 0)
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return -EINVAL;
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rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen);
|
if (rc)
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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);
|
}
|
