484 lines
13 KiB
C
484 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Glue code for DES encryption optimized for sparc64 crypto opcodes.
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*
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* Copyright (C) 2012 David S. Miller <davem@davemloft.net>
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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/internal/des.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 des_sparc64_ctx {
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u64 encrypt_expkey[DES_EXPKEY_WORDS / 2];
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u64 decrypt_expkey[DES_EXPKEY_WORDS / 2];
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};
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struct des3_ede_sparc64_ctx {
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u64 encrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
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u64 decrypt_expkey[DES3_EDE_EXPKEY_WORDS / 2];
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};
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static void encrypt_to_decrypt(u64 *d, const u64 *e)
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{
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const u64 *s = e + (DES_EXPKEY_WORDS / 2) - 1;
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int i;
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for (i = 0; i < DES_EXPKEY_WORDS / 2; i++)
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*d++ = *s--;
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}
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extern void des_sparc64_key_expand(const u32 *input_key, u64 *key);
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static int des_set_key(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct des_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
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int err;
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/* Even though we have special instructions for key expansion,
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* we call des_verify_key() so that we don't have to write our own
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* weak key detection code.
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*/
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err = crypto_des_verify_key(tfm, key);
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if (err)
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return err;
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des_sparc64_key_expand((const u32 *) key, &dctx->encrypt_expkey[0]);
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encrypt_to_decrypt(&dctx->decrypt_expkey[0], &dctx->encrypt_expkey[0]);
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return 0;
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}
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static int des_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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return des_set_key(crypto_skcipher_tfm(tfm), key, keylen);
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}
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extern void des_sparc64_crypt(const u64 *key, const u64 *input,
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u64 *output);
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static void sparc_des_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
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const u64 *K = ctx->encrypt_expkey;
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des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
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}
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static void sparc_des_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct des_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
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const u64 *K = ctx->decrypt_expkey;
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des_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
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}
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extern void des_sparc64_load_keys(const u64 *key);
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extern void des_sparc64_ecb_crypt(const u64 *input, u64 *output,
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unsigned int len);
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static int __ecb_crypt(struct skcipher_request *req, bool encrypt)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct des_sparc64_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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if (encrypt)
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des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
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else
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des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
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while ((nbytes = walk.nbytes) != 0) {
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des_sparc64_ecb_crypt(walk.src.virt.addr, walk.dst.virt.addr,
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round_down(nbytes, DES_BLOCK_SIZE));
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err = skcipher_walk_done(&walk, nbytes % DES_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_encrypt(struct skcipher_request *req)
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{
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return __ecb_crypt(req, true);
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}
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static int ecb_decrypt(struct skcipher_request *req)
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{
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return __ecb_crypt(req, false);
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}
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extern void des_sparc64_cbc_encrypt(const u64 *input, u64 *output,
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unsigned int len, u64 *iv);
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extern void des_sparc64_cbc_decrypt(const u64 *input, u64 *output,
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unsigned int len, u64 *iv);
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static int __cbc_crypt(struct skcipher_request *req, bool encrypt)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct des_sparc64_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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if (encrypt)
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des_sparc64_load_keys(&ctx->encrypt_expkey[0]);
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else
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des_sparc64_load_keys(&ctx->decrypt_expkey[0]);
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while ((nbytes = walk.nbytes) != 0) {
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if (encrypt)
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des_sparc64_cbc_encrypt(walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes,
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DES_BLOCK_SIZE),
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walk.iv);
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else
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des_sparc64_cbc_decrypt(walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes,
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DES_BLOCK_SIZE),
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walk.iv);
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err = skcipher_walk_done(&walk, nbytes % DES_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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return __cbc_crypt(req, true);
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}
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static int cbc_decrypt(struct skcipher_request *req)
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{
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return __cbc_crypt(req, false);
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}
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static int des3_ede_set_key(struct crypto_tfm *tfm, const u8 *key,
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unsigned int keylen)
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{
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struct des3_ede_sparc64_ctx *dctx = crypto_tfm_ctx(tfm);
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u64 k1[DES_EXPKEY_WORDS / 2];
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u64 k2[DES_EXPKEY_WORDS / 2];
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u64 k3[DES_EXPKEY_WORDS / 2];
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int err;
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err = crypto_des3_ede_verify_key(tfm, key);
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if (err)
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return err;
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des_sparc64_key_expand((const u32 *)key, k1);
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key += DES_KEY_SIZE;
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des_sparc64_key_expand((const u32 *)key, k2);
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key += DES_KEY_SIZE;
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des_sparc64_key_expand((const u32 *)key, k3);
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memcpy(&dctx->encrypt_expkey[0], &k1[0], sizeof(k1));
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encrypt_to_decrypt(&dctx->encrypt_expkey[DES_EXPKEY_WORDS / 2], &k2[0]);
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memcpy(&dctx->encrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
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&k3[0], sizeof(k3));
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encrypt_to_decrypt(&dctx->decrypt_expkey[0], &k3[0]);
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memcpy(&dctx->decrypt_expkey[DES_EXPKEY_WORDS / 2],
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&k2[0], sizeof(k2));
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encrypt_to_decrypt(&dctx->decrypt_expkey[(DES_EXPKEY_WORDS / 2) * 2],
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&k1[0]);
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return 0;
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}
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static int des3_ede_set_key_skcipher(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen)
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{
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return des3_ede_set_key(crypto_skcipher_tfm(tfm), key, keylen);
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}
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extern void des3_ede_sparc64_crypt(const u64 *key, const u64 *input,
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u64 *output);
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static void sparc_des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
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const u64 *K = ctx->encrypt_expkey;
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des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
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}
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static void sparc_des3_ede_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
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{
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struct des3_ede_sparc64_ctx *ctx = crypto_tfm_ctx(tfm);
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const u64 *K = ctx->decrypt_expkey;
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des3_ede_sparc64_crypt(K, (const u64 *) src, (u64 *) dst);
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}
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extern void des3_ede_sparc64_load_keys(const u64 *key);
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extern void des3_ede_sparc64_ecb_crypt(const u64 *expkey, const u64 *input,
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u64 *output, unsigned int len);
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static int __ecb3_crypt(struct skcipher_request *req, bool encrypt)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct des3_ede_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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const u64 *K;
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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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if (encrypt)
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K = &ctx->encrypt_expkey[0];
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else
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K = &ctx->decrypt_expkey[0];
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des3_ede_sparc64_load_keys(K);
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while ((nbytes = walk.nbytes) != 0) {
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des3_ede_sparc64_ecb_crypt(K, walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes, DES_BLOCK_SIZE));
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err = skcipher_walk_done(&walk, nbytes % DES_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 ecb3_encrypt(struct skcipher_request *req)
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{
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return __ecb3_crypt(req, true);
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}
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static int ecb3_decrypt(struct skcipher_request *req)
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{
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return __ecb3_crypt(req, false);
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}
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extern void des3_ede_sparc64_cbc_encrypt(const u64 *expkey, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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extern void des3_ede_sparc64_cbc_decrypt(const u64 *expkey, const u64 *input,
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u64 *output, unsigned int len,
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u64 *iv);
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static int __cbc3_crypt(struct skcipher_request *req, bool encrypt)
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{
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struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
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const struct des3_ede_sparc64_ctx *ctx = crypto_skcipher_ctx(tfm);
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struct skcipher_walk walk;
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const u64 *K;
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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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if (encrypt)
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K = &ctx->encrypt_expkey[0];
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else
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K = &ctx->decrypt_expkey[0];
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des3_ede_sparc64_load_keys(K);
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while ((nbytes = walk.nbytes) != 0) {
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if (encrypt)
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des3_ede_sparc64_cbc_encrypt(K, walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes,
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DES_BLOCK_SIZE),
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walk.iv);
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else
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des3_ede_sparc64_cbc_decrypt(K, walk.src.virt.addr,
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walk.dst.virt.addr,
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round_down(nbytes,
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DES_BLOCK_SIZE),
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walk.iv);
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err = skcipher_walk_done(&walk, nbytes % DES_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 cbc3_encrypt(struct skcipher_request *req)
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{
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return __cbc3_crypt(req, true);
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}
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static int cbc3_decrypt(struct skcipher_request *req)
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{
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return __cbc3_crypt(req, false);
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}
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static struct crypto_alg cipher_algs[] = {
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{
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.cra_name = "des",
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.cra_driver_name = "des-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 = DES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct des_sparc64_ctx),
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.cra_alignmask = 7,
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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 = DES_KEY_SIZE,
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.cia_max_keysize = DES_KEY_SIZE,
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.cia_setkey = des_set_key,
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.cia_encrypt = sparc_des_encrypt,
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.cia_decrypt = sparc_des_decrypt
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}
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}
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}, {
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.cra_name = "des3_ede",
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.cra_driver_name = "des3_ede-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 = DES3_EDE_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
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.cra_alignmask = 7,
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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 = DES3_EDE_KEY_SIZE,
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.cia_max_keysize = DES3_EDE_KEY_SIZE,
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.cia_setkey = des3_ede_set_key,
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.cia_encrypt = sparc_des3_ede_encrypt,
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.cia_decrypt = sparc_des3_ede_decrypt
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}
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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(des)",
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.base.cra_driver_name = "ecb-des-sparc64",
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.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.base.cra_blocksize = DES_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct des_sparc64_ctx),
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.base.cra_alignmask = 7,
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.base.cra_module = THIS_MODULE,
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.min_keysize = DES_KEY_SIZE,
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.max_keysize = DES_KEY_SIZE,
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.setkey = des_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(des)",
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.base.cra_driver_name = "cbc-des-sparc64",
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.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.base.cra_blocksize = DES_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct des_sparc64_ctx),
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.base.cra_alignmask = 7,
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.base.cra_module = THIS_MODULE,
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.min_keysize = DES_KEY_SIZE,
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.max_keysize = DES_KEY_SIZE,
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.ivsize = DES_BLOCK_SIZE,
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.setkey = des_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 = "ecb(des3_ede)",
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.base.cra_driver_name = "ecb-des3_ede-sparc64",
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.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
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.base.cra_alignmask = 7,
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.base.cra_module = THIS_MODULE,
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.min_keysize = DES3_EDE_KEY_SIZE,
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.max_keysize = DES3_EDE_KEY_SIZE,
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.setkey = des3_ede_set_key_skcipher,
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.encrypt = ecb3_encrypt,
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.decrypt = ecb3_decrypt,
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}, {
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.base.cra_name = "cbc(des3_ede)",
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.base.cra_driver_name = "cbc-des3_ede-sparc64",
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.base.cra_priority = SPARC_CR_OPCODE_PRIORITY,
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.base.cra_blocksize = DES3_EDE_BLOCK_SIZE,
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.base.cra_ctxsize = sizeof(struct des3_ede_sparc64_ctx),
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.base.cra_alignmask = 7,
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.base.cra_module = THIS_MODULE,
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.min_keysize = DES3_EDE_KEY_SIZE,
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.max_keysize = DES3_EDE_KEY_SIZE,
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.ivsize = DES3_EDE_BLOCK_SIZE,
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.setkey = des3_ede_set_key_skcipher,
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.encrypt = cbc3_encrypt,
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.decrypt = cbc3_decrypt,
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}
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};
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static bool __init sparc64_has_des_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_DES))
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return false;
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return true;
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}
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static int __init des_sparc64_mod_init(void)
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{
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int err;
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if (!sparc64_has_des_opcode()) {
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pr_info("sparc64 des opcodes not available.\n");
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return -ENODEV;
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}
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pr_info("Using sparc64 des opcodes optimized DES implementation\n");
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err = crypto_register_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
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if (err)
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return err;
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err = crypto_register_skciphers(skcipher_algs,
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ARRAY_SIZE(skcipher_algs));
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if (err)
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crypto_unregister_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
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return err;
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}
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static void __exit des_sparc64_mod_fini(void)
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{
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crypto_unregister_algs(cipher_algs, ARRAY_SIZE(cipher_algs));
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crypto_unregister_skciphers(skcipher_algs, ARRAY_SIZE(skcipher_algs));
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}
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module_init(des_sparc64_mod_init);
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module_exit(des_sparc64_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("DES & Triple DES EDE Cipher Algorithms, sparc64 des opcode accelerated");
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|
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MODULE_ALIAS_CRYPTO("des");
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MODULE_ALIAS_CRYPTO("des3_ede");
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|
|
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#include "crop_devid.c"
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