506 lines
15 KiB
C
506 lines
15 KiB
C
/* 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 <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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u32 *flags = &tfm->crt_flags;
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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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*flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
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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 void 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 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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#define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1))
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static int ecb_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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ctx->ops->load_encrypt_keys(&ctx->key[0]);
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & AES_BLOCK_MASK;
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if (likely(block_len)) {
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ctx->ops->ecb_encrypt(&ctx->key[0],
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(const u64 *)walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr,
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block_len);
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}
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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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 blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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u64 *key_end;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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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)) {
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unsigned int block_len = nbytes & AES_BLOCK_MASK;
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if (likely(block_len)) {
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ctx->ops->ecb_decrypt(key_end,
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(const u64 *) walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr, block_len);
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}
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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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 blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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ctx->ops->load_encrypt_keys(&ctx->key[0]);
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while ((nbytes = walk.nbytes)) {
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unsigned int block_len = nbytes & AES_BLOCK_MASK;
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if (likely(block_len)) {
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ctx->ops->cbc_encrypt(&ctx->key[0],
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(const u64 *)walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr,
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block_len, (u64 *) walk.iv);
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}
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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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 blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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u64 *key_end;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt(desc, &walk);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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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)) {
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unsigned int block_len = nbytes & AES_BLOCK_MASK;
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if (likely(block_len)) {
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ctx->ops->cbc_decrypt(key_end,
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(const u64 *) walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr,
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block_len, (u64 *) walk.iv);
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}
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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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(struct crypto_sparc64_aes_ctx *ctx,
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struct blkcipher_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 blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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int err;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
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desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
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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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unsigned int block_len = nbytes & AES_BLOCK_MASK;
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if (likely(block_len)) {
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ctx->ops->ctr_crypt(&ctx->key[0],
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(const u64 *)walk.src.virt.addr,
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(u64 *) walk.dst.virt.addr,
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block_len, (u64 *) walk.iv);
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}
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nbytes &= AES_BLOCK_SIZE - 1;
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err = blkcipher_walk_done(desc, &walk, nbytes);
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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 = blkcipher_walk_done(desc, &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 algs[] = { {
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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 = aes_encrypt,
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.cia_decrypt = aes_decrypt
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}
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}
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}, {
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.cra_name = "ecb(aes)",
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.cra_driver_name = "ecb-aes-sparc64",
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.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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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 = 7,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.blkcipher = {
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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,
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.encrypt = ecb_encrypt,
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.decrypt = ecb_decrypt,
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},
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},
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}, {
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.cra_name = "cbc(aes)",
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.cra_driver_name = "cbc-aes-sparc64",
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.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
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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 = 7,
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.cra_type = &crypto_blkcipher_type,
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.cra_module = THIS_MODULE,
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.cra_u = {
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.blkcipher = {
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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,
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.encrypt = cbc_encrypt,
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|
.decrypt = cbc_decrypt,
|
|
},
|
|
},
|
|
}, {
|
|
.cra_name = "ctr(aes)",
|
|
.cra_driver_name = "ctr-aes-sparc64",
|
|
.cra_priority = SPARC_CR_OPCODE_PRIORITY,
|
|
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
|
|
.cra_blocksize = 1,
|
|
.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
|
|
.cra_alignmask = 7,
|
|
.cra_type = &crypto_blkcipher_type,
|
|
.cra_module = THIS_MODULE,
|
|
.cra_u = {
|
|
.blkcipher = {
|
|
.min_keysize = AES_MIN_KEY_SIZE,
|
|
.max_keysize = AES_MAX_KEY_SIZE,
|
|
.ivsize = AES_BLOCK_SIZE,
|
|
.setkey = aes_set_key,
|
|
.encrypt = ctr_crypt,
|
|
.decrypt = ctr_crypt,
|
|
},
|
|
},
|
|
} };
|
|
|
|
static bool __init sparc64_has_aes_opcode(void)
|
|
{
|
|
unsigned long cfr;
|
|
|
|
if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
|
|
return false;
|
|
|
|
__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
|
|
if (!(cfr & CFR_AES))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static int __init aes_sparc64_mod_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(algs); i++)
|
|
INIT_LIST_HEAD(&algs[i].cra_list);
|
|
|
|
if (sparc64_has_aes_opcode()) {
|
|
pr_info("Using sparc64 aes opcodes optimized AES implementation\n");
|
|
return crypto_register_algs(algs, ARRAY_SIZE(algs));
|
|
}
|
|
pr_info("sparc64 aes opcodes not available.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void __exit aes_sparc64_mod_fini(void)
|
|
{
|
|
crypto_unregister_algs(algs, ARRAY_SIZE(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"
|