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-rw-r--r--crypto/lskcipher.c634
1 files changed, 634 insertions, 0 deletions
diff --git a/crypto/lskcipher.c b/crypto/lskcipher.c
new file mode 100644
index 0000000000..9edc897309
--- /dev/null
+++ b/crypto/lskcipher.c
@@ -0,0 +1,634 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Linear symmetric key cipher operations.
+ *
+ * Generic encrypt/decrypt wrapper for ciphers.
+ *
+ * Copyright (c) 2023 Herbert Xu <herbert@gondor.apana.org.au>
+ */
+
+#include <linux/cryptouser.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <net/netlink.h>
+#include "skcipher.h"
+
+static inline struct crypto_lskcipher *__crypto_lskcipher_cast(
+ struct crypto_tfm *tfm)
+{
+ return container_of(tfm, struct crypto_lskcipher, base);
+}
+
+static inline struct lskcipher_alg *__crypto_lskcipher_alg(
+ struct crypto_alg *alg)
+{
+ return container_of(alg, struct lskcipher_alg, co.base);
+}
+
+static inline struct crypto_istat_cipher *lskcipher_get_stat(
+ struct lskcipher_alg *alg)
+{
+ return skcipher_get_stat_common(&alg->co);
+}
+
+static inline int crypto_lskcipher_errstat(struct lskcipher_alg *alg, int err)
+{
+ struct crypto_istat_cipher *istat = lskcipher_get_stat(alg);
+
+ if (!IS_ENABLED(CONFIG_CRYPTO_STATS))
+ return err;
+
+ if (err)
+ atomic64_inc(&istat->err_cnt);
+
+ return err;
+}
+
+static int lskcipher_setkey_unaligned(struct crypto_lskcipher *tfm,
+ const u8 *key, unsigned int keylen)
+{
+ unsigned long alignmask = crypto_lskcipher_alignmask(tfm);
+ struct lskcipher_alg *cipher = crypto_lskcipher_alg(tfm);
+ u8 *buffer, *alignbuffer;
+ unsigned long absize;
+ int ret;
+
+ absize = keylen + alignmask;
+ buffer = kmalloc(absize, GFP_ATOMIC);
+ if (!buffer)
+ return -ENOMEM;
+
+ alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
+ memcpy(alignbuffer, key, keylen);
+ ret = cipher->setkey(tfm, alignbuffer, keylen);
+ kfree_sensitive(buffer);
+ return ret;
+}
+
+int crypto_lskcipher_setkey(struct crypto_lskcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ unsigned long alignmask = crypto_lskcipher_alignmask(tfm);
+ struct lskcipher_alg *cipher = crypto_lskcipher_alg(tfm);
+
+ if (keylen < cipher->co.min_keysize || keylen > cipher->co.max_keysize)
+ return -EINVAL;
+
+ if ((unsigned long)key & alignmask)
+ return lskcipher_setkey_unaligned(tfm, key, keylen);
+ else
+ return cipher->setkey(tfm, key, keylen);
+}
+EXPORT_SYMBOL_GPL(crypto_lskcipher_setkey);
+
+static int crypto_lskcipher_crypt_unaligned(
+ struct crypto_lskcipher *tfm, const u8 *src, u8 *dst, unsigned len,
+ u8 *iv, int (*crypt)(struct crypto_lskcipher *tfm, const u8 *src,
+ u8 *dst, unsigned len, u8 *iv, bool final))
+{
+ unsigned ivsize = crypto_lskcipher_ivsize(tfm);
+ unsigned bs = crypto_lskcipher_blocksize(tfm);
+ unsigned cs = crypto_lskcipher_chunksize(tfm);
+ int err;
+ u8 *tiv;
+ u8 *p;
+
+ BUILD_BUG_ON(MAX_CIPHER_BLOCKSIZE > PAGE_SIZE ||
+ MAX_CIPHER_ALIGNMASK >= PAGE_SIZE);
+
+ tiv = kmalloc(PAGE_SIZE, GFP_ATOMIC);
+ if (!tiv)
+ return -ENOMEM;
+
+ memcpy(tiv, iv, ivsize);
+
+ p = kmalloc(PAGE_SIZE, GFP_ATOMIC);
+ err = -ENOMEM;
+ if (!p)
+ goto out;
+
+ while (len >= bs) {
+ unsigned chunk = min((unsigned)PAGE_SIZE, len);
+ int err;
+
+ if (chunk > cs)
+ chunk &= ~(cs - 1);
+
+ memcpy(p, src, chunk);
+ err = crypt(tfm, p, p, chunk, tiv, true);
+ if (err)
+ goto out;
+
+ memcpy(dst, p, chunk);
+ src += chunk;
+ dst += chunk;
+ len -= chunk;
+ }
+
+ err = len ? -EINVAL : 0;
+
+out:
+ memcpy(iv, tiv, ivsize);
+ kfree_sensitive(p);
+ kfree_sensitive(tiv);
+ return err;
+}
+
+static int crypto_lskcipher_crypt(struct crypto_lskcipher *tfm, const u8 *src,
+ u8 *dst, unsigned len, u8 *iv,
+ int (*crypt)(struct crypto_lskcipher *tfm,
+ const u8 *src, u8 *dst,
+ unsigned len, u8 *iv,
+ bool final))
+{
+ unsigned long alignmask = crypto_lskcipher_alignmask(tfm);
+ struct lskcipher_alg *alg = crypto_lskcipher_alg(tfm);
+ int ret;
+
+ if (((unsigned long)src | (unsigned long)dst | (unsigned long)iv) &
+ alignmask) {
+ ret = crypto_lskcipher_crypt_unaligned(tfm, src, dst, len, iv,
+ crypt);
+ goto out;
+ }
+
+ ret = crypt(tfm, src, dst, len, iv, true);
+
+out:
+ return crypto_lskcipher_errstat(alg, ret);
+}
+
+int crypto_lskcipher_encrypt(struct crypto_lskcipher *tfm, const u8 *src,
+ u8 *dst, unsigned len, u8 *iv)
+{
+ struct lskcipher_alg *alg = crypto_lskcipher_alg(tfm);
+
+ if (IS_ENABLED(CONFIG_CRYPTO_STATS)) {
+ struct crypto_istat_cipher *istat = lskcipher_get_stat(alg);
+
+ atomic64_inc(&istat->encrypt_cnt);
+ atomic64_add(len, &istat->encrypt_tlen);
+ }
+
+ return crypto_lskcipher_crypt(tfm, src, dst, len, iv, alg->encrypt);
+}
+EXPORT_SYMBOL_GPL(crypto_lskcipher_encrypt);
+
+int crypto_lskcipher_decrypt(struct crypto_lskcipher *tfm, const u8 *src,
+ u8 *dst, unsigned len, u8 *iv)
+{
+ struct lskcipher_alg *alg = crypto_lskcipher_alg(tfm);
+
+ if (IS_ENABLED(CONFIG_CRYPTO_STATS)) {
+ struct crypto_istat_cipher *istat = lskcipher_get_stat(alg);
+
+ atomic64_inc(&istat->decrypt_cnt);
+ atomic64_add(len, &istat->decrypt_tlen);
+ }
+
+ return crypto_lskcipher_crypt(tfm, src, dst, len, iv, alg->decrypt);
+}
+EXPORT_SYMBOL_GPL(crypto_lskcipher_decrypt);
+
+static int crypto_lskcipher_crypt_sg(struct skcipher_request *req,
+ int (*crypt)(struct crypto_lskcipher *tfm,
+ const u8 *src, u8 *dst,
+ unsigned len, u8 *iv,
+ bool final))
+{
+ struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
+ struct crypto_lskcipher **ctx = crypto_skcipher_ctx(skcipher);
+ struct crypto_lskcipher *tfm = *ctx;
+ struct skcipher_walk walk;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, false);
+
+ while (walk.nbytes) {
+ err = crypt(tfm, walk.src.virt.addr, walk.dst.virt.addr,
+ walk.nbytes, walk.iv, walk.nbytes == walk.total);
+ err = skcipher_walk_done(&walk, err);
+ }
+
+ return err;
+}
+
+int crypto_lskcipher_encrypt_sg(struct skcipher_request *req)
+{
+ struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
+ struct crypto_lskcipher **ctx = crypto_skcipher_ctx(skcipher);
+ struct lskcipher_alg *alg = crypto_lskcipher_alg(*ctx);
+
+ return crypto_lskcipher_crypt_sg(req, alg->encrypt);
+}
+
+int crypto_lskcipher_decrypt_sg(struct skcipher_request *req)
+{
+ struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
+ struct crypto_lskcipher **ctx = crypto_skcipher_ctx(skcipher);
+ struct lskcipher_alg *alg = crypto_lskcipher_alg(*ctx);
+
+ return crypto_lskcipher_crypt_sg(req, alg->decrypt);
+}
+
+static void crypto_lskcipher_exit_tfm(struct crypto_tfm *tfm)
+{
+ struct crypto_lskcipher *skcipher = __crypto_lskcipher_cast(tfm);
+ struct lskcipher_alg *alg = crypto_lskcipher_alg(skcipher);
+
+ alg->exit(skcipher);
+}
+
+static int crypto_lskcipher_init_tfm(struct crypto_tfm *tfm)
+{
+ struct crypto_lskcipher *skcipher = __crypto_lskcipher_cast(tfm);
+ struct lskcipher_alg *alg = crypto_lskcipher_alg(skcipher);
+
+ if (alg->exit)
+ skcipher->base.exit = crypto_lskcipher_exit_tfm;
+
+ if (alg->init)
+ return alg->init(skcipher);
+
+ return 0;
+}
+
+static void crypto_lskcipher_free_instance(struct crypto_instance *inst)
+{
+ struct lskcipher_instance *skcipher =
+ container_of(inst, struct lskcipher_instance, s.base);
+
+ skcipher->free(skcipher);
+}
+
+static void __maybe_unused crypto_lskcipher_show(
+ struct seq_file *m, struct crypto_alg *alg)
+{
+ struct lskcipher_alg *skcipher = __crypto_lskcipher_alg(alg);
+
+ seq_printf(m, "type : lskcipher\n");
+ seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
+ seq_printf(m, "min keysize : %u\n", skcipher->co.min_keysize);
+ seq_printf(m, "max keysize : %u\n", skcipher->co.max_keysize);
+ seq_printf(m, "ivsize : %u\n", skcipher->co.ivsize);
+ seq_printf(m, "chunksize : %u\n", skcipher->co.chunksize);
+}
+
+static int __maybe_unused crypto_lskcipher_report(
+ struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct lskcipher_alg *skcipher = __crypto_lskcipher_alg(alg);
+ struct crypto_report_blkcipher rblkcipher;
+
+ memset(&rblkcipher, 0, sizeof(rblkcipher));
+
+ strscpy(rblkcipher.type, "lskcipher", sizeof(rblkcipher.type));
+ strscpy(rblkcipher.geniv, "<none>", sizeof(rblkcipher.geniv));
+
+ rblkcipher.blocksize = alg->cra_blocksize;
+ rblkcipher.min_keysize = skcipher->co.min_keysize;
+ rblkcipher.max_keysize = skcipher->co.max_keysize;
+ rblkcipher.ivsize = skcipher->co.ivsize;
+
+ return nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER,
+ sizeof(rblkcipher), &rblkcipher);
+}
+
+static int __maybe_unused crypto_lskcipher_report_stat(
+ struct sk_buff *skb, struct crypto_alg *alg)
+{
+ struct lskcipher_alg *skcipher = __crypto_lskcipher_alg(alg);
+ struct crypto_istat_cipher *istat;
+ struct crypto_stat_cipher rcipher;
+
+ istat = lskcipher_get_stat(skcipher);
+
+ memset(&rcipher, 0, sizeof(rcipher));
+
+ strscpy(rcipher.type, "cipher", sizeof(rcipher.type));
+
+ rcipher.stat_encrypt_cnt = atomic64_read(&istat->encrypt_cnt);
+ rcipher.stat_encrypt_tlen = atomic64_read(&istat->encrypt_tlen);
+ rcipher.stat_decrypt_cnt = atomic64_read(&istat->decrypt_cnt);
+ rcipher.stat_decrypt_tlen = atomic64_read(&istat->decrypt_tlen);
+ rcipher.stat_err_cnt = atomic64_read(&istat->err_cnt);
+
+ return nla_put(skb, CRYPTOCFGA_STAT_CIPHER, sizeof(rcipher), &rcipher);
+}
+
+static const struct crypto_type crypto_lskcipher_type = {
+ .extsize = crypto_alg_extsize,
+ .init_tfm = crypto_lskcipher_init_tfm,
+ .free = crypto_lskcipher_free_instance,
+#ifdef CONFIG_PROC_FS
+ .show = crypto_lskcipher_show,
+#endif
+#if IS_ENABLED(CONFIG_CRYPTO_USER)
+ .report = crypto_lskcipher_report,
+#endif
+#ifdef CONFIG_CRYPTO_STATS
+ .report_stat = crypto_lskcipher_report_stat,
+#endif
+ .maskclear = ~CRYPTO_ALG_TYPE_MASK,
+ .maskset = CRYPTO_ALG_TYPE_MASK,
+ .type = CRYPTO_ALG_TYPE_LSKCIPHER,
+ .tfmsize = offsetof(struct crypto_lskcipher, base),
+};
+
+static void crypto_lskcipher_exit_tfm_sg(struct crypto_tfm *tfm)
+{
+ struct crypto_lskcipher **ctx = crypto_tfm_ctx(tfm);
+
+ crypto_free_lskcipher(*ctx);
+}
+
+int crypto_init_lskcipher_ops_sg(struct crypto_tfm *tfm)
+{
+ struct crypto_lskcipher **ctx = crypto_tfm_ctx(tfm);
+ struct crypto_alg *calg = tfm->__crt_alg;
+ struct crypto_lskcipher *skcipher;
+
+ if (!crypto_mod_get(calg))
+ return -EAGAIN;
+
+ skcipher = crypto_create_tfm(calg, &crypto_lskcipher_type);
+ if (IS_ERR(skcipher)) {
+ crypto_mod_put(calg);
+ return PTR_ERR(skcipher);
+ }
+
+ *ctx = skcipher;
+ tfm->exit = crypto_lskcipher_exit_tfm_sg;
+
+ return 0;
+}
+
+int crypto_grab_lskcipher(struct crypto_lskcipher_spawn *spawn,
+ struct crypto_instance *inst,
+ const char *name, u32 type, u32 mask)
+{
+ spawn->base.frontend = &crypto_lskcipher_type;
+ return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_grab_lskcipher);
+
+struct crypto_lskcipher *crypto_alloc_lskcipher(const char *alg_name,
+ u32 type, u32 mask)
+{
+ return crypto_alloc_tfm(alg_name, &crypto_lskcipher_type, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_alloc_lskcipher);
+
+static int lskcipher_prepare_alg(struct lskcipher_alg *alg)
+{
+ struct crypto_alg *base = &alg->co.base;
+ int err;
+
+ err = skcipher_prepare_alg_common(&alg->co);
+ if (err)
+ return err;
+
+ if (alg->co.chunksize & (alg->co.chunksize - 1))
+ return -EINVAL;
+
+ base->cra_type = &crypto_lskcipher_type;
+ base->cra_flags |= CRYPTO_ALG_TYPE_LSKCIPHER;
+
+ return 0;
+}
+
+int crypto_register_lskcipher(struct lskcipher_alg *alg)
+{
+ struct crypto_alg *base = &alg->co.base;
+ int err;
+
+ err = lskcipher_prepare_alg(alg);
+ if (err)
+ return err;
+
+ return crypto_register_alg(base);
+}
+EXPORT_SYMBOL_GPL(crypto_register_lskcipher);
+
+void crypto_unregister_lskcipher(struct lskcipher_alg *alg)
+{
+ crypto_unregister_alg(&alg->co.base);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_lskcipher);
+
+int crypto_register_lskciphers(struct lskcipher_alg *algs, int count)
+{
+ int i, ret;
+
+ for (i = 0; i < count; i++) {
+ ret = crypto_register_lskcipher(&algs[i]);
+ if (ret)
+ goto err;
+ }
+
+ return 0;
+
+err:
+ for (--i; i >= 0; --i)
+ crypto_unregister_lskcipher(&algs[i]);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(crypto_register_lskciphers);
+
+void crypto_unregister_lskciphers(struct lskcipher_alg *algs, int count)
+{
+ int i;
+
+ for (i = count - 1; i >= 0; --i)
+ crypto_unregister_lskcipher(&algs[i]);
+}
+EXPORT_SYMBOL_GPL(crypto_unregister_lskciphers);
+
+int lskcipher_register_instance(struct crypto_template *tmpl,
+ struct lskcipher_instance *inst)
+{
+ int err;
+
+ if (WARN_ON(!inst->free))
+ return -EINVAL;
+
+ err = lskcipher_prepare_alg(&inst->alg);
+ if (err)
+ return err;
+
+ return crypto_register_instance(tmpl, lskcipher_crypto_instance(inst));
+}
+EXPORT_SYMBOL_GPL(lskcipher_register_instance);
+
+static int lskcipher_setkey_simple(struct crypto_lskcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct crypto_lskcipher *cipher = lskcipher_cipher_simple(tfm);
+
+ crypto_lskcipher_clear_flags(cipher, CRYPTO_TFM_REQ_MASK);
+ crypto_lskcipher_set_flags(cipher, crypto_lskcipher_get_flags(tfm) &
+ CRYPTO_TFM_REQ_MASK);
+ return crypto_lskcipher_setkey(cipher, key, keylen);
+}
+
+static int lskcipher_init_tfm_simple(struct crypto_lskcipher *tfm)
+{
+ struct lskcipher_instance *inst = lskcipher_alg_instance(tfm);
+ struct crypto_lskcipher **ctx = crypto_lskcipher_ctx(tfm);
+ struct crypto_lskcipher_spawn *spawn;
+ struct crypto_lskcipher *cipher;
+
+ spawn = lskcipher_instance_ctx(inst);
+ cipher = crypto_spawn_lskcipher(spawn);
+ if (IS_ERR(cipher))
+ return PTR_ERR(cipher);
+
+ *ctx = cipher;
+ return 0;
+}
+
+static void lskcipher_exit_tfm_simple(struct crypto_lskcipher *tfm)
+{
+ struct crypto_lskcipher **ctx = crypto_lskcipher_ctx(tfm);
+
+ crypto_free_lskcipher(*ctx);
+}
+
+static void lskcipher_free_instance_simple(struct lskcipher_instance *inst)
+{
+ crypto_drop_lskcipher(lskcipher_instance_ctx(inst));
+ kfree(inst);
+}
+
+/**
+ * lskcipher_alloc_instance_simple - allocate instance of simple block cipher
+ *
+ * Allocate an lskcipher_instance for a simple block cipher mode of operation,
+ * e.g. cbc or ecb. The instance context will have just a single crypto_spawn,
+ * that for the underlying cipher. The {min,max}_keysize, ivsize, blocksize,
+ * alignmask, and priority are set from the underlying cipher but can be
+ * overridden if needed. The tfm context defaults to
+ * struct crypto_lskcipher *, and default ->setkey(), ->init(), and
+ * ->exit() methods are installed.
+ *
+ * @tmpl: the template being instantiated
+ * @tb: the template parameters
+ *
+ * Return: a pointer to the new instance, or an ERR_PTR(). The caller still
+ * needs to register the instance.
+ */
+struct lskcipher_instance *lskcipher_alloc_instance_simple(
+ struct crypto_template *tmpl, struct rtattr **tb)
+{
+ u32 mask;
+ struct lskcipher_instance *inst;
+ struct crypto_lskcipher_spawn *spawn;
+ char ecb_name[CRYPTO_MAX_ALG_NAME];
+ struct lskcipher_alg *cipher_alg;
+ const char *cipher_name;
+ int err;
+
+ err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_LSKCIPHER, &mask);
+ if (err)
+ return ERR_PTR(err);
+
+ cipher_name = crypto_attr_alg_name(tb[1]);
+ if (IS_ERR(cipher_name))
+ return ERR_CAST(cipher_name);
+
+ inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
+ if (!inst)
+ return ERR_PTR(-ENOMEM);
+
+ spawn = lskcipher_instance_ctx(inst);
+ err = crypto_grab_lskcipher(spawn,
+ lskcipher_crypto_instance(inst),
+ cipher_name, 0, mask);
+
+ ecb_name[0] = 0;
+ if (err == -ENOENT && !!memcmp(tmpl->name, "ecb", 4)) {
+ err = -ENAMETOOLONG;
+ if (snprintf(ecb_name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
+ cipher_name) >= CRYPTO_MAX_ALG_NAME)
+ goto err_free_inst;
+
+ err = crypto_grab_lskcipher(spawn,
+ lskcipher_crypto_instance(inst),
+ ecb_name, 0, mask);
+ }
+
+ if (err)
+ goto err_free_inst;
+
+ cipher_alg = crypto_lskcipher_spawn_alg(spawn);
+
+ err = crypto_inst_setname(lskcipher_crypto_instance(inst), tmpl->name,
+ &cipher_alg->co.base);
+ if (err)
+ goto err_free_inst;
+
+ if (ecb_name[0]) {
+ int len;
+
+ err = -EINVAL;
+ len = strscpy(ecb_name, &cipher_alg->co.base.cra_name[4],
+ sizeof(ecb_name));
+ if (len < 2)
+ goto err_free_inst;
+
+ if (ecb_name[len - 1] != ')')
+ goto err_free_inst;
+
+ ecb_name[len - 1] = 0;
+
+ err = -ENAMETOOLONG;
+ if (snprintf(inst->alg.co.base.cra_name, CRYPTO_MAX_ALG_NAME,
+ "%s(%s)", tmpl->name, ecb_name) >=
+ CRYPTO_MAX_ALG_NAME)
+ goto err_free_inst;
+
+ if (strcmp(ecb_name, cipher_name) &&
+ snprintf(inst->alg.co.base.cra_driver_name,
+ CRYPTO_MAX_ALG_NAME,
+ "%s(%s)", tmpl->name, cipher_name) >=
+ CRYPTO_MAX_ALG_NAME)
+ goto err_free_inst;
+ } else {
+ /* Don't allow nesting. */
+ err = -ELOOP;
+ if ((cipher_alg->co.base.cra_flags & CRYPTO_ALG_INSTANCE))
+ goto err_free_inst;
+ }
+
+ err = -EINVAL;
+ if (cipher_alg->co.ivsize)
+ goto err_free_inst;
+
+ inst->free = lskcipher_free_instance_simple;
+
+ /* Default algorithm properties, can be overridden */
+ inst->alg.co.base.cra_blocksize = cipher_alg->co.base.cra_blocksize;
+ inst->alg.co.base.cra_alignmask = cipher_alg->co.base.cra_alignmask;
+ inst->alg.co.base.cra_priority = cipher_alg->co.base.cra_priority;
+ inst->alg.co.min_keysize = cipher_alg->co.min_keysize;
+ inst->alg.co.max_keysize = cipher_alg->co.max_keysize;
+ inst->alg.co.ivsize = cipher_alg->co.base.cra_blocksize;
+
+ /* Use struct crypto_lskcipher * by default, can be overridden */
+ inst->alg.co.base.cra_ctxsize = sizeof(struct crypto_lskcipher *);
+ inst->alg.setkey = lskcipher_setkey_simple;
+ inst->alg.init = lskcipher_init_tfm_simple;
+ inst->alg.exit = lskcipher_exit_tfm_simple;
+
+ return inst;
+
+err_free_inst:
+ lskcipher_free_instance_simple(inst);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL_GPL(lskcipher_alloc_instance_simple);