/* SPDX-License-Identifier: GPL-2.0-or-later *//* * RSA internal helpers * * Copyright (c) 2015, Intel Corporation * Authors: Tadeusz Struk <tadeusz.struk@intel.com> */#ifndef _RSA_HELPER_#define _RSA_HELPER_#include <linux/types.h>#include <crypto/akcipher.h> /** * rsa_key - RSA key structure * @n           : RSA modulus raw byte stream * @e           : RSA public exponent raw byte stream * @d           : RSA private exponent raw byte stream * @p           : RSA prime factor p of n raw byte stream * @q           : RSA prime factor q of n raw byte stream * @dp          : RSA exponent d mod (p - 1) raw byte stream * @dq          : RSA exponent d mod (q - 1) raw byte stream * @qinv        : RSA CRT coefficient q^(-1) mod p raw byte stream * @n_sz        : length in bytes of RSA modulus n * @e_sz        : length in bytes of RSA public exponent * @d_sz        : length in bytes of RSA private exponent * @p_sz        : length in bytes of p field * @q_sz        : length in bytes of q field * @dp_sz       : length in bytes of dp field * @dq_sz       : length in bytes of dq field * @qinv_sz     : length in bytes of qinv field */struct rsa_key {	const u8 *n;	const u8 *e;	const u8 *d;	const u8 *p;	const u8 *q;	const u8 *dp;	const u8 *dq;	const u8 *qinv;	size_t n_sz;	size_t e_sz;	size_t d_sz;	size_t p_sz;	size_t q_sz;	size_t dp_sz;	size_t dq_sz;	size_t qinv_sz;}; int rsa_parse_pub_key(struct rsa_key *rsa_key, const void *key,		      unsigned int key_len); int rsa_parse_priv_key(struct rsa_key *rsa_key, const void *key,		       unsigned int key_len); #define RSA_PUB (true)#define RSA_PRIV (false) static inline int rsa_set_key(struct crypto_akcipher *child,			      unsigned int *key_size, bool is_pubkey,			      const void *key, unsigned int keylen){	int err; 	*key_size = 0; 	if (is_pubkey)		err = crypto_akcipher_set_pub_key(child, key, keylen);	else		err = crypto_akcipher_set_priv_key(child, key, keylen);	if (err)		return err; 	/* Find out new modulus size from rsa implementation */	err = crypto_akcipher_maxsize(child);	if (err > PAGE_SIZE)		return -ENOTSUPP; 	*key_size = err;	return 0;} extern struct crypto_template rsa_pkcs1pad_tmpl;extern struct crypto_template rsassa_pkcs1_tmpl;#endif