arch/sparc/crypto/camellia_glue.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /* Glue code for CAMELLIA encryption optimized for sparc64 crypto opcodes.
  *
  * Copyright (C) 2012 David S. Miller <davem@davemloft.net>
  */

 #define pr_fmt(fmt)	KBUILD_MODNAME ": " fmt

 #include <linux/crypto.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/mm.h>
 #include <linux/types.h>
 #include <crypto/algapi.h>
 #include <crypto/internal/skcipher.h>

 #include <asm/fpumacro.h>
 #include <asm/pstate.h>
 #include <asm/elf.h>

 #include "opcodes.h"

 #define CAMELLIA_MIN_KEY_SIZE        16
 #define CAMELLIA_MAX_KEY_SIZE        32
 #define CAMELLIA_BLOCK_SIZE          16
 #define CAMELLIA_TABLE_BYTE_LEN     272

 struct camellia_sparc64_ctx {
 	u64 encrypt_key[CAMELLIA_TABLE_BYTE_LEN / sizeof(u64)];
 	u64 decrypt_key[CAMELLIA_TABLE_BYTE_LEN / sizeof(u64)];
 	int key_len;
 };

 extern void camellia_sparc64_key_expand(const u32 *in_key, u64 *encrypt_key,
 					unsigned int key_len, u64 *decrypt_key);

 static int camellia_set_key(struct crypto_tfm *tfm, const u8 *_in_key,
 			    unsigned int key_len)
 {
 	struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
 	const u32 *in_key = (const u32 *) _in_key;

 	if (key_len != 16 && key_len != 24 && key_len != 32)
 		return -EINVAL;

 	ctx->key_len = key_len;

 	camellia_sparc64_key_expand(in_key, &ctx->encrypt_key[0],
 				    key_len, &ctx->decrypt_key[0]);
 	return 0;
 }

 static int camellia_set_key_skcipher(struct crypto_skcipher *tfm,
 				     const u8 *in_key, unsigned int key_len)
 {
 	return camellia_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
 }

 extern void camellia_sparc64_crypt(const u64 *key, const u32 *input,
 				   u32 *output, unsigned int key_len);

 static void camellia_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);

 	camellia_sparc64_crypt(&ctx->encrypt_key[0],
 			       (const u32 *) src,
 			       (u32 *) dst, ctx->key_len);
 }

 static void camellia_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 {
 	struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);

 	camellia_sparc64_crypt(&ctx->decrypt_key[0],
 			       (const u32 *) src,
 			       (u32 *) dst, ctx->key_len);
 }

 extern void camellia_sparc64_load_keys(const u64 *key, unsigned int key_len);

 typedef void ecb_crypt_op(const u64 *input, u64 *output, unsigned int len,
 			  const u64 *key);

 extern ecb_crypt_op camellia_sparc64_ecb_crypt_3_grand_rounds;
 extern ecb_crypt_op camellia_sparc64_ecb_crypt_4_grand_rounds;

 static int __ecb_crypt(struct skcipher_request *req, bool encrypt)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
 	struct skcipher_walk walk;
 	ecb_crypt_op *op;
 	const u64 *key;
 	unsigned int nbytes;
 	int err;

 	op = camellia_sparc64_ecb_crypt_3_grand_rounds;
 	if (ctx->key_len != 16)
 		op = camellia_sparc64_ecb_crypt_4_grand_rounds;

 	err = skcipher_walk_virt(&walk, req, true);
 	if (err)
 		return err;

 	if (encrypt)
 		key = &ctx->encrypt_key[0];
 	else
 		key = &ctx->decrypt_key[0];
 	camellia_sparc64_load_keys(key, ctx->key_len);
 	while ((nbytes = walk.nbytes) != 0) {
 		op(walk.src.virt.addr, walk.dst.virt.addr,
 		   round_down(nbytes, CAMELLIA_BLOCK_SIZE), key);
 		err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
 	}
 	fprs_write(0);
 	return err;
 }

 static int ecb_encrypt(struct skcipher_request *req)
 {
 	return __ecb_crypt(req, true);
 }

 static int ecb_decrypt(struct skcipher_request *req)
 {
 	return __ecb_crypt(req, false);
 }

 typedef void cbc_crypt_op(const u64 *input, u64 *output, unsigned int len,
 			  const u64 *key, u64 *iv);

 extern cbc_crypt_op camellia_sparc64_cbc_encrypt_3_grand_rounds;
 extern cbc_crypt_op camellia_sparc64_cbc_encrypt_4_grand_rounds;
 extern cbc_crypt_op camellia_sparc64_cbc_decrypt_3_grand_rounds;
 extern cbc_crypt_op camellia_sparc64_cbc_decrypt_4_grand_rounds;

 static int cbc_encrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
 	struct skcipher_walk walk;
 	cbc_crypt_op *op;
 	const u64 *key;
 	unsigned int nbytes;
 	int err;

 	op = camellia_sparc64_cbc_encrypt_3_grand_rounds;
 	if (ctx->key_len != 16)
 		op = camellia_sparc64_cbc_encrypt_4_grand_rounds;

 	err = skcipher_walk_virt(&walk, req, true);
 	if (err)
 		return err;

 	key = &ctx->encrypt_key[0];
 	camellia_sparc64_load_keys(key, ctx->key_len);
 	while ((nbytes = walk.nbytes) != 0) {
 		op(walk.src.virt.addr, walk.dst.virt.addr,
 		   round_down(nbytes, CAMELLIA_BLOCK_SIZE), key, walk.iv);
 		err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
 	}
 	fprs_write(0);
 	return err;
 }

 static int cbc_decrypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
 	struct skcipher_walk walk;
 	cbc_crypt_op *op;
 	const u64 *key;
 	unsigned int nbytes;
 	int err;

 	op = camellia_sparc64_cbc_decrypt_3_grand_rounds;
 	if (ctx->key_len != 16)
 		op = camellia_sparc64_cbc_decrypt_4_grand_rounds;

 	err = skcipher_walk_virt(&walk, req, true);
 	if (err)
 		return err;

 	key = &ctx->decrypt_key[0];
 	camellia_sparc64_load_keys(key, ctx->key_len);
 	while ((nbytes = walk.nbytes) != 0) {
 		op(walk.src.virt.addr, walk.dst.virt.addr,
 		   round_down(nbytes, CAMELLIA_BLOCK_SIZE), key, walk.iv);
 		err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
 	}
 	fprs_write(0);
 	return err;
 }

 static struct crypto_alg cipher_alg = {
 	.cra_name		= "camellia",
 	.cra_driver_name	= "camellia-sparc64",
 	.cra_priority		= SPARC_CR_OPCODE_PRIORITY,
 	.cra_flags		= CRYPTO_ALG_TYPE_CIPHER,
 	.cra_blocksize		= CAMELLIA_BLOCK_SIZE,
 	.cra_ctxsize		= sizeof(struct camellia_sparc64_ctx),
 	.cra_alignmask		= 3,
 	.cra_module		= THIS_MODULE,
 	.cra_u	= {
 		.cipher	= {
 			.cia_min_keysize	= CAMELLIA_MIN_KEY_SIZE,
 			.cia_max_keysize	= CAMELLIA_MAX_KEY_SIZE,
 			.cia_setkey		= camellia_set_key,
 			.cia_encrypt		= camellia_encrypt,
 			.cia_decrypt		= camellia_decrypt
 		}
 	}
 };

 static struct skcipher_alg skcipher_algs[] = {
 	{
 		.base.cra_name		= "ecb(camellia)",
 		.base.cra_driver_name	= "ecb-camellia-sparc64",
 		.base.cra_priority	= SPARC_CR_OPCODE_PRIORITY,
 		.base.cra_blocksize	= CAMELLIA_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct camellia_sparc64_ctx),
 		.base.cra_alignmask	= 7,
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= CAMELLIA_MIN_KEY_SIZE,
 		.max_keysize		= CAMELLIA_MAX_KEY_SIZE,
 		.setkey			= camellia_set_key_skcipher,
 		.encrypt		= ecb_encrypt,
 		.decrypt		= ecb_decrypt,
 	}, {
 		.base.cra_name		= "cbc(camellia)",
 		.base.cra_driver_name	= "cbc-camellia-sparc64",
 		.base.cra_priority	= SPARC_CR_OPCODE_PRIORITY,
 		.base.cra_blocksize	= CAMELLIA_BLOCK_SIZE,
 		.base.cra_ctxsize	= sizeof(struct camellia_sparc64_ctx),
 		.base.cra_alignmask	= 7,
 		.base.cra_module	= THIS_MODULE,
 		.min_keysize		= CAMELLIA_MIN_KEY_SIZE,
 		.max_keysize		= CAMELLIA_MAX_KEY_SIZE,
 		.ivsize			= CAMELLIA_BLOCK_SIZE,
 		.setkey			= camellia_set_key_skcipher,
 		.encrypt		= cbc_encrypt,
 		.decrypt		= cbc_decrypt,
 	}
 };

 static bool __init sparc64_has_camellia_opcode(void)
 {
 	unsigned long cfr;

 	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
 		return false;

 	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
 	if (!(cfr & CFR_CAMELLIA))
 		return false;

 	return true;
 }

 static int __init camellia_sparc64_mod_init(void)
 {
 	int err;

 	if (!sparc64_has_camellia_opcode()) {
 		pr_info("sparc64 camellia opcodes not available.\n");
 		return -ENODEV;
 	}
 	pr_info("Using sparc64 camellia opcodes optimized CAMELLIA 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 camellia_sparc64_mod_fini(void)
 {
 	crypto_unregister_alg(&cipher_alg);
 	crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
 }

 module_init(camellia_sparc64_mod_init);
 module_exit(camellia_sparc64_mod_fini);

 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Camellia Cipher Algorithm, sparc64 camellia opcode accelerated");

 MODULE_ALIAS_CRYPTO("camellia");

 #include "crop_devid.c"
	// SPDX-License-Identifier: GPL-2.0-only
	/* Glue code for CAMELLIA encryption optimized for sparc64 crypto opcodes.
	*
	* Copyright (C) 2012 David S. Miller <davem@davemloft.net>
	*/

	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

	#include <linux/crypto.h>
	#include <linux/init.h>
	#include <linux/module.h>
	#include <linux/mm.h>
	#include <linux/types.h>
	#include <crypto/algapi.h>
	#include <crypto/internal/skcipher.h>

	#include <asm/fpumacro.h>
	#include <asm/pstate.h>
	#include <asm/elf.h>

	#include "opcodes.h"

	#define CAMELLIA_MIN_KEY_SIZE 16
	#define CAMELLIA_MAX_KEY_SIZE 32
	#define CAMELLIA_BLOCK_SIZE 16
	#define CAMELLIA_TABLE_BYTE_LEN 272

	struct camellia_sparc64_ctx {
	u64 encrypt_key[CAMELLIA_TABLE_BYTE_LEN / sizeof(u64)];
	u64 decrypt_key[CAMELLIA_TABLE_BYTE_LEN / sizeof(u64)];
	int key_len;
	};

	extern void camellia_sparc64_key_expand(const u32 in_key, u64 encrypt_key,
	unsigned int key_len, u64 *decrypt_key);

	static int camellia_set_key(struct crypto_tfm tfm, const u8 _in_key,
	unsigned int key_len)
	{
	struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
	const u32 in_key = (const u32 ) _in_key;

	if (key_len != 16 && key_len != 24 && key_len != 32)
	return -EINVAL;

	ctx->key_len = key_len;

	camellia_sparc64_key_expand(in_key, &ctx->encrypt_key[0],
	key_len, &ctx->decrypt_key[0]);
	return 0;
	}

	static int camellia_set_key_skcipher(struct crypto_skcipher *tfm,
	const u8 *in_key, unsigned int key_len)
	{
	return camellia_set_key(crypto_skcipher_tfm(tfm), in_key, key_len);
	}

	extern void camellia_sparc64_crypt(const u64 key, const u32 input,
	u32 *output, unsigned int key_len);

	static void camellia_encrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
	{
	struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);

	camellia_sparc64_crypt(&ctx->encrypt_key[0],
	(const u32 *) src,
	(u32 *) dst, ctx->key_len);
	}

	static void camellia_decrypt(struct crypto_tfm tfm, u8 dst, const u8 *src)
	{
	struct camellia_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);

	camellia_sparc64_crypt(&ctx->decrypt_key[0],
	(const u32 *) src,
	(u32 *) dst, ctx->key_len);
	}

	extern void camellia_sparc64_load_keys(const u64 *key, unsigned int key_len);

	typedef void ecb_crypt_op(const u64 input, u64 output, unsigned int len,
	const u64 *key);

	extern ecb_crypt_op camellia_sparc64_ecb_crypt_3_grand_rounds;
	extern ecb_crypt_op camellia_sparc64_ecb_crypt_4_grand_rounds;

	static int __ecb_crypt(struct skcipher_request *req, bool encrypt)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_walk walk;
	ecb_crypt_op *op;
	const u64 *key;
	unsigned int nbytes;
	int err;

	op = camellia_sparc64_ecb_crypt_3_grand_rounds;
	if (ctx->key_len != 16)
	op = camellia_sparc64_ecb_crypt_4_grand_rounds;

	err = skcipher_walk_virt(&walk, req, true);
	if (err)
	return err;

	if (encrypt)
	key = &ctx->encrypt_key[0];
	else
	key = &ctx->decrypt_key[0];
	camellia_sparc64_load_keys(key, ctx->key_len);
	while ((nbytes = walk.nbytes) != 0) {
	op(walk.src.virt.addr, walk.dst.virt.addr,
	round_down(nbytes, CAMELLIA_BLOCK_SIZE), key);
	err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
	}
	fprs_write(0);
	return err;
	}

	static int ecb_encrypt(struct skcipher_request *req)
	{
	return __ecb_crypt(req, true);
	}

	static int ecb_decrypt(struct skcipher_request *req)
	{
	return __ecb_crypt(req, false);
	}

	typedef void cbc_crypt_op(const u64 input, u64 output, unsigned int len,
	const u64 key, u64 iv);

	extern cbc_crypt_op camellia_sparc64_cbc_encrypt_3_grand_rounds;
	extern cbc_crypt_op camellia_sparc64_cbc_encrypt_4_grand_rounds;
	extern cbc_crypt_op camellia_sparc64_cbc_decrypt_3_grand_rounds;
	extern cbc_crypt_op camellia_sparc64_cbc_decrypt_4_grand_rounds;

	static int cbc_encrypt(struct skcipher_request *req)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_walk walk;
	cbc_crypt_op *op;
	const u64 *key;
	unsigned int nbytes;
	int err;

	op = camellia_sparc64_cbc_encrypt_3_grand_rounds;
	if (ctx->key_len != 16)
	op = camellia_sparc64_cbc_encrypt_4_grand_rounds;

	err = skcipher_walk_virt(&walk, req, true);
	if (err)
	return err;

	key = &ctx->encrypt_key[0];
	camellia_sparc64_load_keys(key, ctx->key_len);
	while ((nbytes = walk.nbytes) != 0) {
	op(walk.src.virt.addr, walk.dst.virt.addr,
	round_down(nbytes, CAMELLIA_BLOCK_SIZE), key, walk.iv);
	err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
	}
	fprs_write(0);
	return err;
	}

	static int cbc_decrypt(struct skcipher_request *req)
	{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	const struct camellia_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
	struct skcipher_walk walk;
	cbc_crypt_op *op;
	const u64 *key;
	unsigned int nbytes;
	int err;

	op = camellia_sparc64_cbc_decrypt_3_grand_rounds;
	if (ctx->key_len != 16)
	op = camellia_sparc64_cbc_decrypt_4_grand_rounds;

	err = skcipher_walk_virt(&walk, req, true);
	if (err)
	return err;

	key = &ctx->decrypt_key[0];
	camellia_sparc64_load_keys(key, ctx->key_len);
	while ((nbytes = walk.nbytes) != 0) {
	op(walk.src.virt.addr, walk.dst.virt.addr,
	round_down(nbytes, CAMELLIA_BLOCK_SIZE), key, walk.iv);
	err = skcipher_walk_done(&walk, nbytes % CAMELLIA_BLOCK_SIZE);
	}
	fprs_write(0);
	return err;
	}

	static struct crypto_alg cipher_alg = {
	.cra_name = "camellia",
	.cra_driver_name = "camellia-sparc64",
	.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
	.cra_blocksize = CAMELLIA_BLOCK_SIZE,
	.cra_ctxsize = sizeof(struct camellia_sparc64_ctx),
	.cra_alignmask = 3,
	.cra_module = THIS_MODULE,
	.cra_u = {
	.cipher = {
	.cia_min_keysize = CAMELLIA_MIN_KEY_SIZE,
	.cia_max_keysize = CAMELLIA_MAX_KEY_SIZE,
	.cia_setkey = camellia_set_key,
	.cia_encrypt = camellia_encrypt,
	.cia_decrypt = camellia_decrypt
	}
	}
	};

	static struct skcipher_alg skcipher_algs[] = {
	{
	.base.cra_name = "ecb(camellia)",
	.base.cra_driver_name = "ecb-camellia-sparc64",
	.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct camellia_sparc64_ctx),
	.base.cra_alignmask = 7,
	.base.cra_module = THIS_MODULE,
	.min_keysize = CAMELLIA_MIN_KEY_SIZE,
	.max_keysize = CAMELLIA_MAX_KEY_SIZE,
	.setkey = camellia_set_key_skcipher,
	.encrypt = ecb_encrypt,
	.decrypt = ecb_decrypt,
	}, {
	.base.cra_name = "cbc(camellia)",
	.base.cra_driver_name = "cbc-camellia-sparc64",
	.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
	.base.cra_blocksize = CAMELLIA_BLOCK_SIZE,
	.base.cra_ctxsize = sizeof(struct camellia_sparc64_ctx),
	.base.cra_alignmask = 7,
	.base.cra_module = THIS_MODULE,
	.min_keysize = CAMELLIA_MIN_KEY_SIZE,
	.max_keysize = CAMELLIA_MAX_KEY_SIZE,
	.ivsize = CAMELLIA_BLOCK_SIZE,
	.setkey = camellia_set_key_skcipher,
	.encrypt = cbc_encrypt,
	.decrypt = cbc_decrypt,
	}
	};

	static bool __init sparc64_has_camellia_opcode(void)
	{
	unsigned long cfr;

	if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
	return false;

	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
	if (!(cfr & CFR_CAMELLIA))
	return false;

	return true;
	}

	static int __init camellia_sparc64_mod_init(void)
	{
	int err;

	if (!sparc64_has_camellia_opcode()) {
	pr_info("sparc64 camellia opcodes not available.\n");
	return -ENODEV;
	}
	pr_info("Using sparc64 camellia opcodes optimized CAMELLIA 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 camellia_sparc64_mod_fini(void)
	{
	crypto_unregister_alg(&cipher_alg);
	crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
	}

	module_init(camellia_sparc64_mod_init);
	module_exit(camellia_sparc64_mod_fini);

	MODULE_LICENSE("GPL");
	MODULE_DESCRIPTION("Camellia Cipher Algorithm, sparc64 camellia opcode accelerated");

	MODULE_ALIAS_CRYPTO("camellia");

	#include "crop_devid.c"