// SPDX-License-Identifier: GPL-2.0-or-later/* * Public Key Encryption * * Copyright (c) 2015, Intel Corporation * Authors: Tadeusz Struk <tadeusz.struk@intel.com> */#include <linux/errno.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/seq_file.h>#include <linux/slab.h>#include <linux/string.h>#include <linux/crypto.h>#include <linux/compiler.h>#include <crypto/algapi.h>#include <linux/cryptouser.h>#include <net/netlink.h>#include <crypto/akcipher.h>#include <crypto/internal/akcipher.h>#include "internal.h" #ifdef CONFIG_NETstatic int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg){	struct crypto_report_akcipher rakcipher; 	memset(&rakcipher, 0, sizeof(rakcipher)); 	strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type)); 	return nla_put(skb, CRYPTOCFGA_REPORT_AKCIPHER,		       sizeof(rakcipher), &rakcipher);}#elsestatic int crypto_akcipher_report(struct sk_buff *skb, struct crypto_alg *alg){	return -ENOSYS;}#endif static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg)	__maybe_unused; static void crypto_akcipher_show(struct seq_file *m, struct crypto_alg *alg){	seq_puts(m, "type         : akcipher\n");} static void crypto_akcipher_exit_tfm(struct crypto_tfm *tfm){	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher); 	alg->exit(akcipher);} static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm){	struct crypto_akcipher *akcipher = __crypto_akcipher_tfm(tfm);	struct akcipher_alg *alg = crypto_akcipher_alg(akcipher); 	if (alg->exit)		akcipher->base.exit = crypto_akcipher_exit_tfm; 	if (alg->init)		return alg->init(akcipher); 	return 0;} static void crypto_akcipher_free_instance(struct crypto_instance *inst){	struct akcipher_instance *akcipher = akcipher_instance(inst); 	akcipher->free(akcipher);} static const struct crypto_type crypto_akcipher_type = {	.extsize = crypto_alg_extsize,	.init_tfm = crypto_akcipher_init_tfm,	.free = crypto_akcipher_free_instance,#ifdef CONFIG_PROC_FS	.show = crypto_akcipher_show,#endif	.report = crypto_akcipher_report,	.maskclear = ~CRYPTO_ALG_TYPE_MASK,	.maskset = CRYPTO_ALG_TYPE_MASK,	.type = CRYPTO_ALG_TYPE_AKCIPHER,	.tfmsize = offsetof(struct crypto_akcipher, base),}; int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,			 struct crypto_instance *inst,			 const char *name, u32 type, u32 mask){	spawn->base.frontend = &crypto_akcipher_type;	return crypto_grab_spawn(&spawn->base, inst, name, type, mask);}EXPORT_SYMBOL_GPL(crypto_grab_akcipher); struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,					      u32 mask){	return crypto_alloc_tfm(alg_name, &crypto_akcipher_type, type, mask);}EXPORT_SYMBOL_GPL(crypto_alloc_akcipher); static void akcipher_prepare_alg(struct akcipher_alg *alg){	struct crypto_alg *base = &alg->base; 	base->cra_type = &crypto_akcipher_type;	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;	base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;} static int akcipher_default_op(struct akcipher_request *req){	return -ENOSYS;} int crypto_register_akcipher(struct akcipher_alg *alg){	struct crypto_alg *base = &alg->base; 	if (!alg->sign)		alg->sign = akcipher_default_op;	if (!alg->verify)		alg->verify = akcipher_default_op;	if (!alg->encrypt)		alg->encrypt = akcipher_default_op;	if (!alg->decrypt)		alg->decrypt = akcipher_default_op; 	akcipher_prepare_alg(alg);	return crypto_register_alg(base);}EXPORT_SYMBOL_GPL(crypto_register_akcipher); void crypto_unregister_akcipher(struct akcipher_alg *alg){	crypto_unregister_alg(&alg->base);}EXPORT_SYMBOL_GPL(crypto_unregister_akcipher); int akcipher_register_instance(struct crypto_template *tmpl,			       struct akcipher_instance *inst){	if (WARN_ON(!inst->free))		return -EINVAL;	akcipher_prepare_alg(&inst->alg);	return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));}EXPORT_SYMBOL_GPL(akcipher_register_instance); MODULE_LICENSE("GPL");MODULE_DESCRIPTION("Generic public key cipher type");