476 lines
14 KiB
C
476 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Glue code for AES encryption optimized for sparc64 crypto opcodes.
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*
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* This is based largely upon arch/x86/crypto/aesni-intel_glue.c
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*
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* Copyright (C) 2008, Intel Corp.
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* Author: Huang Ying <ying.huang@intel.com>
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*
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* Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
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* interface for 64-bit kernels.
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* Authors: Adrian Hoban <adrian.hoban@intel.com>
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* Gabriele Paoloni <gabriele.paoloni@intel.com>
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* Tadeusz Struk (tadeusz.struk@intel.com)
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* Aidan O'Mahony (aidan.o.mahony@intel.com)
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* Copyright (c) 2010, Intel Corporation.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/crypto.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/types.h>
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#include <crypto/algapi.h>
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#include <crypto/aes.h>
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#include <crypto/internal/skcipher.h>
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#include <asm/fpumacro.h>
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#include <asm/pstate.h>
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#include <asm/elf.h>
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#include "opcodes.h"
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struct aes_ops {
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void (*encrypt)(const u64 *key, const u32 *input, u32 *output);
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void (*decrypt)(const u64 *key, const u32 *input, u32 *output);
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void (*load_encrypt_keys)(const u64 *key);
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void (*load_decrypt_keys)(const u64 *key);
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void (*ecb_encrypt)(const u64 *key, const u64 *input, u64 *output,
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unsigned int len);
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void (*ecb_decrypt)(const u64 *key, const u64 *input, u64 *output,
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unsigned int len);
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void (*cbc_encrypt)(const u64 *key, const u64 *input, u64 *output,
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unsigned int len, u64 *iv);
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void (*cbc_decrypt)(const u64 *key, const u64 *input, u64 *output,
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unsigned int len, u64 *iv);
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void (*ctr_crypt)(const u64 *key, const u64 *input, u64 *output,
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unsigned int len, u64 *iv);
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};
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struct crypto_sparc64_aes_ctx {
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struct aes_ops *ops;
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u64 key[AES_MAX_KEYLENGTH / sizeof(u64)];
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u32 key_length;
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u32 expanded_key_length;
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};
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extern void aes_sparc64_encrypt_128(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_encrypt_192(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_encrypt_256(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_decrypt_128(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_decrypt_192(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_decrypt_256(const u64 *key, const u32 *input,
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u32 *output);
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extern void aes_sparc64_load_encrypt_keys_128(const u64 *key);
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extern void aes_sparc64_load_encrypt_keys_192(const u64 *key);
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extern void aes_sparc64_load_encrypt_keys_256(const u64 *key);
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extern void aes_sparc64_load_decrypt_keys_128(const u64 *key);
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extern void aes_sparc64_load_decrypt_keys_192(const u64 *key);
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extern void aes_sparc64_load_decrypt_keys_256(const u64 *key);
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extern void aes_sparc64_ecb_encrypt_128(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_ecb_encrypt_192(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_ecb_encrypt_256(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_ecb_decrypt_128(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_ecb_decrypt_192(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_ecb_decrypt_256(const u64 *key, const u64 *input,
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u64 *output, unsigned int len);
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extern void aes_sparc64_cbc_encrypt_128(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_cbc_encrypt_192(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_cbc_encrypt_256(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_cbc_decrypt_128(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_cbc_decrypt_192(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_cbc_decrypt_256(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_ctr_crypt_128(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_ctr_crypt_192(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void aes_sparc64_ctr_crypt_256(const u64 *key, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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static struct aes_ops aes128_ops = {
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.encrypt = aes_sparc64_encrypt_128,
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.decrypt = aes_sparc64_decrypt_128,
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.load_encrypt_keys = aes_sparc64_load_encrypt_keys_128,
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.load_decrypt_keys = aes_sparc64_load_decrypt_keys_128,
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.ecb_encrypt = aes_sparc64_ecb_encrypt_128,
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.ecb_decrypt = aes_sparc64_ecb_decrypt_128,
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.cbc_encrypt = aes_sparc64_cbc_encrypt_128,
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.cbc_decrypt = aes_sparc64_cbc_decrypt_128,
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.ctr_crypt = aes_sparc64_ctr_crypt_128,
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};
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static struct aes_ops aes192_ops = {
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.encrypt = aes_sparc64_encrypt_192,
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.decrypt = aes_sparc64_decrypt_192,
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.load_encrypt_keys = aes_sparc64_load_encrypt_keys_192,
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.load_decrypt_keys = aes_sparc64_load_decrypt_keys_192,
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.ecb_encrypt = aes_sparc64_ecb_encrypt_192,
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.ecb_decrypt = aes_sparc64_ecb_decrypt_192,
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.cbc_encrypt = aes_sparc64_cbc_encrypt_192,
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.cbc_decrypt = aes_sparc64_cbc_decrypt_192,
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.ctr_crypt = aes_sparc64_ctr_crypt_192,
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};
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static struct aes_ops aes256_ops = {
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.encrypt = aes_sparc64_encrypt_256,
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.decrypt = aes_sparc64_decrypt_256,
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.load_encrypt_keys = aes_sparc64_load_encrypt_keys_256,
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.load_decrypt_keys = aes_sparc64_load_decrypt_keys_256,
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.ecb_encrypt = aes_sparc64_ecb_encrypt_256,
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.ecb_decrypt = aes_sparc64_ecb_decrypt_256,
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.cbc_encrypt = aes_sparc64_cbc_encrypt_256,
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.cbc_decrypt = aes_sparc64_cbc_decrypt_256,
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.ctr_crypt = aes_sparc64_ctr_crypt_256,
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};
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extern void aes_sparc64_key_expand(const u32 *in_key, u64 *output_key,
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unsigned int key_len);
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static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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unsigned int key_len)
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{
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struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
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switch (key_len) {
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case AES_KEYSIZE_128:
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ctx->expanded_key_length = 0xb0;
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ctx->ops = &aes128_ops;
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break;
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case AES_KEYSIZE_192:
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ctx->expanded_key_length = 0xd0;
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ctx->ops = &aes192_ops;
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break;
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case AES_KEYSIZE_256:
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ctx->expanded_key_length = 0xf0;
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ctx->ops = &aes256_ops;
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break;
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default:
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return -EINVAL;
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}
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aes_sparc64_key_expand((const u32 *)in_key, &ctx->key[0], key_len);
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ctx->key_length = key_len;
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return 0;
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}
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static int aes_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *in_key,
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unsigned int key_len)
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{
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return aes_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
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}
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static void crypto_aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
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ctx->ops->encrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst);
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}
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static void crypto_aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm);
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ctx->ops->decrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst);
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}
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static int ecb_encrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, true);
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if (err)
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return err;
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ctx->ops->load_encrypt_keys(&ctx->key[0]);
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while ((nbytes = walk.nbytes) != 0) {
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ctx->ops->ecb_encrypt(&ctx->key[0], walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes, AES_BLOCK_SIZE));
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err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
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}
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fprs_write(0);
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return err;
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}
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static int ecb_decrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
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const u64 *key_end;
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, true);
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if (err)
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return err;
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ctx->ops->load_decrypt_keys(&ctx->key[0]);
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key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
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while ((nbytes = walk.nbytes) != 0) {
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ctx->ops->ecb_decrypt(key_end, walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes, AES_BLOCK_SIZE));
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err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
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}
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fprs_write(0);
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return err;
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}
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static int cbc_encrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, true);
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if (err)
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return err;
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ctx->ops->load_encrypt_keys(&ctx->key[0]);
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while ((nbytes = walk.nbytes) != 0) {
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ctx->ops->cbc_encrypt(&ctx->key[0], walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes, AES_BLOCK_SIZE),
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walk.iv);
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err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
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}
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fprs_write(0);
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return err;
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}
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static int cbc_decrypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
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const u64 *key_end;
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, true);
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if (err)
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return err;
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ctx->ops->load_decrypt_keys(&ctx->key[0]);
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key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)];
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while ((nbytes = walk.nbytes) != 0) {
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ctx->ops->cbc_decrypt(key_end, walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes, AES_BLOCK_SIZE),
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walk.iv);
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err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
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}
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fprs_write(0);
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return err;
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}
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static void ctr_crypt_final(const struct crypto_sparc64_aes_ctx *ctx,
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struct skcipher_walk *walk)
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{
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u8 *ctrblk = walk->iv;
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u64 keystream[AES_BLOCK_SIZE / sizeof(u64)];
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u8 *src = walk->src.virt.addr;
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u8 *dst = walk->dst.virt.addr;
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unsigned int nbytes = walk->nbytes;
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ctx->ops->ecb_encrypt(&ctx->key[0], (const u64 *)ctrblk,
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keystream, AES_BLOCK_SIZE);
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crypto_xor_cpy(dst, (u8 *) keystream, src, nbytes);
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crypto_inc(ctrblk, AES_BLOCK_SIZE);
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}
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static int ctr_crypt(struct skcipher_request *req)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct crypto_sparc64_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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unsigned int nbytes;
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int err;
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err = skcipher_walk_virt(&walk, req, true);
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if (err)
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return err;
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ctx->ops->load_encrypt_keys(&ctx->key[0]);
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while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
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ctx->ops->ctr_crypt(&ctx->key[0], walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes, AES_BLOCK_SIZE),
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walk.iv);
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err = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE);
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}
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if (walk.nbytes) {
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ctr_crypt_final(ctx, &walk);
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err = skcipher_walk_done(&walk, 0);
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}
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fprs_write(0);
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return err;
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}
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static struct crypto_alg cipher_alg = {
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.cra_name = "aes",
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.cra_driver_name = "aes-sparc64",
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.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
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.cra_alignmask = 3,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.cipher = {
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.cia_min_keysize = AES_MIN_KEY_SIZE,
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.cia_max_keysize = AES_MAX_KEY_SIZE,
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.cia_setkey = aes_set_key,
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.cia_encrypt = crypto_aes_encrypt,
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.cia_decrypt = crypto_aes_decrypt
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}
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}
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};
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static struct skcipher_alg skcipher_algs[] = {
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{
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.base.cra_name = "ecb(aes)",
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.base.cra_driver_name = "ecb-aes-sparc64",
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.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.base.cra_blocksize = AES_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
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.base.cra_alignmask = 7,
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.base.cra_module = THIS_MODULE,
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.setkey = aes_set_key_skcipher,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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}, {
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.base.cra_name = "cbc(aes)",
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.base.cra_driver_name = "cbc-aes-sparc64",
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.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.base.cra_blocksize = AES_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
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.base.cra_alignmask = 7,
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.base.cra_module = THIS_MODULE,
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.ivsize = AES_BLOCK_SIZE,
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.setkey = aes_set_key_skcipher,
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.encrypt = cbc_encrypt,
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.decrypt = cbc_decrypt,
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}, {
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.base.cra_name = "ctr(aes)",
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.base.cra_driver_name = "ctr-aes-sparc64",
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.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.base.cra_blocksize = 1,
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.base.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
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.base.cra_alignmask = 7,
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.base.cra_module = THIS_MODULE,
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.min_keysize = AES_MIN_KEY_SIZE,
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.max_keysize = AES_MAX_KEY_SIZE,
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.ivsize = AES_BLOCK_SIZE,
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.setkey = aes_set_key_skcipher,
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.encrypt = ctr_crypt,
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.decrypt = ctr_crypt,
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.chunksize = AES_BLOCK_SIZE,
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}
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};
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static bool __init sparc64_has_aes_opcode(void)
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{
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unsigned long cfr;
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if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
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return false;
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__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
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if (!(cfr & CFR_AES))
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return false;
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return true;
|
|
}
|
|
|
|
static int __init aes_sparc64_mod_init(void)
|
|
{
|
|
int err;
|
|
|
|
if (!sparc64_has_aes_opcode()) {
|
|
pr_info("sparc64 aes opcodes not available.\n");
|
|
return -ENODEV;
|
|
}
|
|
pr_info("Using sparc64 aes opcodes optimized AES implementation\n");
|
|
err = crypto_register_alg(&cipher_alg);
|
|
if (err)
|
|
return err;
|
|
err = crypto_register_skciphers(skcipher_algs,
|
|
ARRAY_SIZE(skcipher_algs));
|
|
if (err)
|
|
crypto_unregister_alg(&cipher_alg);
|
|
return err;
|
|
}
|
|
|
|
static void __exit aes_sparc64_mod_fini(void)
|
|
{
|
|
crypto_unregister_alg(&cipher_alg);
|
|
crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
|
|
}
|
|
|
|
module_init(aes_sparc64_mod_init);
|
|
module_exit(aes_sparc64_mod_fini);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, sparc64 aes opcode accelerated");
|
|
|
|
MODULE_ALIAS_CRYPTO("aes");
|
|
|
|
#include "crop_devid.c"
|