[linux.git] / crypto / rsa.c

/* RSA asymmetric public-key algorithm [RFC3447]
 *
 * Copyright (c) 2015, Intel Corporation
 * Authors: Tadeusz Struk <[email protected]>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/mpi.h>
#include <crypto/internal/rsa.h>
#include <crypto/internal/akcipher.h>
#include <crypto/akcipher.h>
#include <crypto/algapi.h>

struct rsa_mpi_key {
	MPI n;
	MPI e;
	MPI d;
};

/*
 * RSAEP function [RFC3447 sec 5.1.1]
 * c = m^e mod n;
 */
static int _rsa_enc(const struct rsa_mpi_key *key, MPI c, MPI m)
{
	/* (1) Validate 0 <= m < n */
	if (mpi_cmp_ui(m, 0) < 0 || mpi_cmp(m, key->n) >= 0)
		return -EINVAL;

	/* (2) c = m^e mod n */
	return mpi_powm(c, m, key->e, key->n);
}

/*
 * RSADP function [RFC3447 sec 5.1.2]
 * m = c^d mod n;
 */
static int _rsa_dec(const struct rsa_mpi_key *key, MPI m, MPI c)
{
	/* (1) Validate 0 <= c < n */
	if (mpi_cmp_ui(c, 0) < 0 || mpi_cmp(c, key->n) >= 0)
		return -EINVAL;

	/* (2) m = c^d mod n */
	return mpi_powm(m, c, key->d, key->n);
}

/*
 * RSASP1 function [RFC3447 sec 5.2.1]
 * s = m^d mod n
 */
static int _rsa_sign(const struct rsa_mpi_key *key, MPI s, MPI m)
{
	/* (1) Validate 0 <= m < n */
	if (mpi_cmp_ui(m, 0) < 0 || mpi_cmp(m, key->n) >= 0)
		return -EINVAL;

	/* (2) s = m^d mod n */
	return mpi_powm(s, m, key->d, key->n);
}

/*
 * RSAVP1 function [RFC3447 sec 5.2.2]
 * m = s^e mod n;
 */
static int _rsa_verify(const struct rsa_mpi_key *key, MPI m, MPI s)
{
	/* (1) Validate 0 <= s < n */
	if (mpi_cmp_ui(s, 0) < 0 || mpi_cmp(s, key->n) >= 0)
		return -EINVAL;

	/* (2) m = s^e mod n */
	return mpi_powm(m, s, key->e, key->n);
}

static inline struct rsa_mpi_key *rsa_get_key(struct crypto_akcipher *tfm)
{
	return akcipher_tfm_ctx(tfm);
}

static int rsa_enc(struct akcipher_request *req)
{
	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
	const struct rsa_mpi_key *pkey = rsa_get_key(tfm);
	MPI m, c = mpi_alloc(0);
	int ret = 0;
	int sign;

	if (!c)
		return -ENOMEM;

	if (unlikely(!pkey->n || !pkey->e)) {
		ret = -EINVAL;
		goto err_free_c;
	}

	ret = -ENOMEM;
	m = mpi_read_raw_from_sgl(req->src, req->src_len);
	if (!m)
		goto err_free_c;

	ret = _rsa_enc(pkey, c, m);
	if (ret)
		goto err_free_m;

	ret = mpi_write_to_sgl(c, req->dst, req->dst_len, &sign);
	if (ret)
		goto err_free_m;

	if (sign < 0)
		ret = -EBADMSG;

err_free_m:
	mpi_free(m);
err_free_c:
	mpi_free(c);
	return ret;
}

static int rsa_dec(struct akcipher_request *req)
{
	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
	const struct rsa_mpi_key *pkey = rsa_get_key(tfm);
	MPI c, m = mpi_alloc(0);
	int ret = 0;
	int sign;

	if (!m)
		return -ENOMEM;

	if (unlikely(!pkey->n || !pkey->d)) {
		ret = -EINVAL;
		goto err_free_m;
	}

	ret = -ENOMEM;
	c = mpi_read_raw_from_sgl(req->src, req->src_len);
	if (!c)
		goto err_free_m;

	ret = _rsa_dec(pkey, m, c);
	if (ret)
		goto err_free_c;

	ret = mpi_write_to_sgl(m, req->dst, req->dst_len, &sign);
	if (ret)
		goto err_free_c;

	if (sign < 0)
		ret = -EBADMSG;
err_free_c:
	mpi_free(c);
err_free_m:
	mpi_free(m);
	return ret;
}

static int rsa_sign(struct akcipher_request *req)
{
	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
	const struct rsa_mpi_key *pkey = rsa_get_key(tfm);
	MPI m, s = mpi_alloc(0);
	int ret = 0;
	int sign;

	if (!s)
		return -ENOMEM;

	if (unlikely(!pkey->n || !pkey->d)) {
		ret = -EINVAL;
		goto err_free_s;
	}

	ret = -ENOMEM;
	m = mpi_read_raw_from_sgl(req->src, req->src_len);
	if (!m)
		goto err_free_s;

	ret = _rsa_sign(pkey, s, m);
	if (ret)
		goto err_free_m;

	ret = mpi_write_to_sgl(s, req->dst, req->dst_len, &sign);
	if (ret)
		goto err_free_m;

	if (sign < 0)
		ret = -EBADMSG;

err_free_m:
	mpi_free(m);
err_free_s:
	mpi_free(s);
	return ret;
}

static int rsa_verify(struct akcipher_request *req)
{
	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
	const struct rsa_mpi_key *pkey = rsa_get_key(tfm);
	MPI s, m = mpi_alloc(0);
	int ret = 0;
	int sign;

	if (!m)
		return -ENOMEM;

	if (unlikely(!pkey->n || !pkey->e)) {
		ret = -EINVAL;
		goto err_free_m;
	}

	s = mpi_read_raw_from_sgl(req->src, req->src_len);
	if (!s) {
		ret = -ENOMEM;
		goto err_free_m;
	}

	ret = _rsa_verify(pkey, m, s);
	if (ret)
		goto err_free_s;

	ret = mpi_write_to_sgl(m, req->dst, req->dst_len, &sign);
	if (ret)
		goto err_free_s;

	if (sign < 0)
		ret = -EBADMSG;

err_free_s:
	mpi_free(s);
err_free_m:
	mpi_free(m);
	return ret;
}

static void rsa_free_mpi_key(struct rsa_mpi_key *key)
{
	mpi_free(key->d);
	mpi_free(key->e);
	mpi_free(key->n);
	key->d = NULL;
	key->e = NULL;
	key->n = NULL;
}

static int rsa_check_key_length(unsigned int len)
{
	switch (len) {
	case 512:
	case 1024:
	case 1536:
	case 2048:
	case 3072:
	case 4096:
		return 0;
	}

	return -EINVAL;
}

static int rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
			   unsigned int keylen)
{
	struct rsa_mpi_key *mpi_key = akcipher_tfm_ctx(tfm);
	struct rsa_key raw_key = {0};
	int ret;

	/* Free the old MPI key if any */
	rsa_free_mpi_key(mpi_key);

	ret = rsa_parse_pub_key(&raw_key, key, keylen);
	if (ret)
		return ret;

	mpi_key->e = mpi_read_raw_data(raw_key.e, raw_key.e_sz);
	if (!mpi_key->e)
		goto err;

	mpi_key->n = mpi_read_raw_data(raw_key.n, raw_key.n_sz);
	if (!mpi_key->n)
		goto err;

	if (rsa_check_key_length(mpi_get_size(mpi_key->n) << 3)) {
		rsa_free_mpi_key(mpi_key);
		return -EINVAL;
	}

	return 0;

err:
	rsa_free_mpi_key(mpi_key);
	return -ENOMEM;
}

static int rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
			    unsigned int keylen)
{
	struct rsa_mpi_key *mpi_key = akcipher_tfm_ctx(tfm);
	struct rsa_key raw_key = {0};
	int ret;

	/* Free the old MPI key if any */
	rsa_free_mpi_key(mpi_key);

	ret = rsa_parse_priv_key(&raw_key, key, keylen);
	if (ret)
		return ret;

	mpi_key->d = mpi_read_raw_data(raw_key.d, raw_key.d_sz);
	if (!mpi_key->d)
		goto err;

	mpi_key->e = mpi_read_raw_data(raw_key.e, raw_key.e_sz);
	if (!mpi_key->e)
		goto err;

	mpi_key->n = mpi_read_raw_data(raw_key.n, raw_key.n_sz);
	if (!mpi_key->n)
		goto err;

	if (rsa_check_key_length(mpi_get_size(mpi_key->n) << 3)) {
		rsa_free_mpi_key(mpi_key);
		return -EINVAL;
	}

	return 0;

err:
	rsa_free_mpi_key(mpi_key);
	return -ENOMEM;
}

static unsigned int rsa_max_size(struct crypto_akcipher *tfm)
{
	struct rsa_mpi_key *pkey = akcipher_tfm_ctx(tfm);

	return mpi_get_size(pkey->n);
}

static void rsa_exit_tfm(struct crypto_akcipher *tfm)
{
	struct rsa_mpi_key *pkey = akcipher_tfm_ctx(tfm);

	rsa_free_mpi_key(pkey);
}

static struct akcipher_alg rsa = {
	.encrypt = rsa_enc,
	.decrypt = rsa_dec,
	.sign = rsa_sign,
	.verify = rsa_verify,
	.set_priv_key = rsa_set_priv_key,
	.set_pub_key = rsa_set_pub_key,
	.max_size = rsa_max_size,
	.exit = rsa_exit_tfm,
	.base = {
		.cra_name = "rsa",
		.cra_driver_name = "rsa-generic",
		.cra_priority = 100,
		.cra_module = THIS_MODULE,
		.cra_ctxsize = sizeof(struct rsa_mpi_key),
	},
};

static int rsa_init(void)
{
	int err;

	err = crypto_register_akcipher(&rsa);
	if (err)
		return err;

	err = crypto_register_template(&rsa_pkcs1pad_tmpl);
	if (err) {
		crypto_unregister_akcipher(&rsa);
		return err;
	}

	return 0;
}

static void rsa_exit(void)
{
	crypto_unregister_template(&rsa_pkcs1pad_tmpl);
	crypto_unregister_akcipher(&rsa);
}

module_init(rsa_init);
module_exit(rsa_exit);
MODULE_ALIAS_CRYPTO("rsa");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("RSA generic algorithm");
Commit	Line	Data
cfc2bb32 TS	1	/* RSA asymmetric public-key algorithm [RFC3447]
	2	*
	3	* Copyright (c) 2015, Intel Corporation
	4	* Authors: Tadeusz Struk <[email protected]>
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public Licence
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the Licence, or (at your option) any later version.
	10	*/
	11
	12	#include <linux/module.h>
5a7de973	13	#include <linux/mpi.h>
cfc2bb32 TS	14	#include <crypto/internal/rsa.h>
	15	#include <crypto/internal/akcipher.h>
	16	#include <crypto/akcipher.h>
3d5b1ecd	17	#include <crypto/algapi.h>
cfc2bb32	18
5a7de973 TA	19	struct rsa_mpi_key {
	20	MPI n;
	21	MPI e;
	22	MPI d;
	23	};
	24
cfc2bb32 TS	25	/*
	26	* RSAEP function [RFC3447 sec 5.1.1]
	27	* c = m^e mod n;
	28	*/
5a7de973	29	static int _rsa_enc(const struct rsa_mpi_key *key, MPI c, MPI m)
cfc2bb32 TS	30	{
	31	/* (1) Validate 0 <= m < n */
	32	if (mpi_cmp_ui(m, 0) < 0 \|\| mpi_cmp(m, key->n) >= 0)
	33	return -EINVAL;
	34
	35	/* (2) c = m^e mod n */
	36	return mpi_powm(c, m, key->e, key->n);
	37	}
	38
	39	/*
	40	* RSADP function [RFC3447 sec 5.1.2]
	41	* m = c^d mod n;
	42	*/
5a7de973	43	static int _rsa_dec(const struct rsa_mpi_key *key, MPI m, MPI c)
cfc2bb32 TS	44	{
	45	/* (1) Validate 0 <= c < n */
	46	if (mpi_cmp_ui(c, 0) < 0 \|\| mpi_cmp(c, key->n) >= 0)
	47	return -EINVAL;
	48
	49	/* (2) m = c^d mod n */
	50	return mpi_powm(m, c, key->d, key->n);
	51	}
	52
	53	/*
	54	* RSASP1 function [RFC3447 sec 5.2.1]
	55	* s = m^d mod n
	56	*/
5a7de973	57	static int _rsa_sign(const struct rsa_mpi_key *key, MPI s, MPI m)
cfc2bb32 TS	58	{
	59	/* (1) Validate 0 <= m < n */
	60	if (mpi_cmp_ui(m, 0) < 0 \|\| mpi_cmp(m, key->n) >= 0)
	61	return -EINVAL;
	62
	63	/* (2) s = m^d mod n */
	64	return mpi_powm(s, m, key->d, key->n);
	65	}
	66
	67	/*
	68	* RSAVP1 function [RFC3447 sec 5.2.2]
	69	* m = s^e mod n;
	70	*/
5a7de973	71	static int _rsa_verify(const struct rsa_mpi_key *key, MPI m, MPI s)
cfc2bb32 TS	72	{
	73	/* (1) Validate 0 <= s < n */
	74	if (mpi_cmp_ui(s, 0) < 0 \|\| mpi_cmp(s, key->n) >= 0)
	75	return -EINVAL;
	76
	77	/* (2) m = s^e mod n */
	78	return mpi_powm(m, s, key->e, key->n);
	79	}
	80
5a7de973	81	static inline struct rsa_mpi_key rsa_get_key(struct crypto_akcipher tfm)
cfc2bb32 TS	82	{
	83	return akcipher_tfm_ctx(tfm);
	84	}
	85
	86	static int rsa_enc(struct akcipher_request *req)
	87	{
	88	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
5a7de973	89	const struct rsa_mpi_key *pkey = rsa_get_key(tfm);
cfc2bb32 TS	90	MPI m, c = mpi_alloc(0);
	91	int ret = 0;
	92	int sign;
	93
	94	if (!c)
	95	return -ENOMEM;
	96
	97	if (unlikely(!pkey->n \|\| !pkey->e)) {
	98	ret = -EINVAL;
	99	goto err_free_c;
	100	}
	101
22287b0b TS	102	ret = -ENOMEM;
	103	m = mpi_read_raw_from_sgl(req->src, req->src_len);
	104	if (!m)
cfc2bb32	105	goto err_free_c;
cfc2bb32 TS	106
	107	ret = _rsa_enc(pkey, c, m);
	108	if (ret)
	109	goto err_free_m;
	110
9b45b7bb	111	ret = mpi_write_to_sgl(c, req->dst, req->dst_len, &sign);
cfc2bb32 TS	112	if (ret)
	113	goto err_free_m;
	114
22287b0b	115	if (sign < 0)
cfc2bb32	116	ret = -EBADMSG;
cfc2bb32 TS	117
	118	err_free_m:
	119	mpi_free(m);
	120	err_free_c:
	121	mpi_free(c);
	122	return ret;
	123	}
	124
	125	static int rsa_dec(struct akcipher_request *req)
	126	{
	127	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
5a7de973	128	const struct rsa_mpi_key *pkey = rsa_get_key(tfm);
cfc2bb32 TS	129	MPI c, m = mpi_alloc(0);
	130	int ret = 0;
	131	int sign;
	132
	133	if (!m)
	134	return -ENOMEM;
	135
	136	if (unlikely(!pkey->n \|\| !pkey->d)) {
	137	ret = -EINVAL;
	138	goto err_free_m;
	139	}
	140
22287b0b TS	141	ret = -ENOMEM;
	142	c = mpi_read_raw_from_sgl(req->src, req->src_len);
	143	if (!c)
cfc2bb32	144	goto err_free_m;
cfc2bb32 TS	145
	146	ret = _rsa_dec(pkey, m, c);
	147	if (ret)
	148	goto err_free_c;
	149
9b45b7bb	150	ret = mpi_write_to_sgl(m, req->dst, req->dst_len, &sign);
cfc2bb32 TS	151	if (ret)
	152	goto err_free_c;
	153
22287b0b	154	if (sign < 0)
cfc2bb32	155	ret = -EBADMSG;
cfc2bb32 TS	156	err_free_c:
	157	mpi_free(c);
	158	err_free_m:
	159	mpi_free(m);
	160	return ret;
	161	}
	162
	163	static int rsa_sign(struct akcipher_request *req)
	164	{
	165	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
5a7de973	166	const struct rsa_mpi_key *pkey = rsa_get_key(tfm);
cfc2bb32 TS	167	MPI m, s = mpi_alloc(0);
	168	int ret = 0;
	169	int sign;
	170
	171	if (!s)
	172	return -ENOMEM;
	173
	174	if (unlikely(!pkey->n \|\| !pkey->d)) {
	175	ret = -EINVAL;
	176	goto err_free_s;
	177	}
	178
22287b0b TS	179	ret = -ENOMEM;
	180	m = mpi_read_raw_from_sgl(req->src, req->src_len);
	181	if (!m)
cfc2bb32	182	goto err_free_s;
cfc2bb32 TS	183
	184	ret = _rsa_sign(pkey, s, m);
	185	if (ret)
	186	goto err_free_m;
	187
9b45b7bb	188	ret = mpi_write_to_sgl(s, req->dst, req->dst_len, &sign);
cfc2bb32 TS	189	if (ret)
	190	goto err_free_m;
	191
22287b0b	192	if (sign < 0)
cfc2bb32	193	ret = -EBADMSG;
cfc2bb32 TS	194
	195	err_free_m:
	196	mpi_free(m);
	197	err_free_s:
	198	mpi_free(s);
	199	return ret;
	200	}
	201
	202	static int rsa_verify(struct akcipher_request *req)
	203	{
	204	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
5a7de973	205	const struct rsa_mpi_key *pkey = rsa_get_key(tfm);
cfc2bb32 TS	206	MPI s, m = mpi_alloc(0);
	207	int ret = 0;
	208	int sign;
	209
	210	if (!m)
	211	return -ENOMEM;
	212
	213	if (unlikely(!pkey->n \|\| !pkey->e)) {
	214	ret = -EINVAL;
	215	goto err_free_m;
	216	}
	217
22287b0b	218	s = mpi_read_raw_from_sgl(req->src, req->src_len);
cfc2bb32 TS	219	if (!s) {
	220	ret = -ENOMEM;
	221	goto err_free_m;
	222	}
	223
	224	ret = _rsa_verify(pkey, m, s);
	225	if (ret)
	226	goto err_free_s;
	227
9b45b7bb	228	ret = mpi_write_to_sgl(m, req->dst, req->dst_len, &sign);
cfc2bb32 TS	229	if (ret)
	230	goto err_free_s;
	231
22287b0b	232	if (sign < 0)
cfc2bb32	233	ret = -EBADMSG;
cfc2bb32 TS	234
	235	err_free_s:
	236	mpi_free(s);
	237	err_free_m:
	238	mpi_free(m);
	239	return ret;
	240	}
	241
5a7de973 TA	242	static void rsa_free_mpi_key(struct rsa_mpi_key *key)
	243	{
	244	mpi_free(key->d);
	245	mpi_free(key->e);
	246	mpi_free(key->n);
	247	key->d = NULL;
	248	key->e = NULL;
	249	key->n = NULL;
	250	}
	251
6e8ec66c TS	252	static int rsa_check_key_length(unsigned int len)
	253	{
	254	switch (len) {
	255	case 512:
	256	case 1024:
	257	case 1536:
	258	case 2048:
	259	case 3072:
	260	case 4096:
	261	return 0;
	262	}
	263
	264	return -EINVAL;
	265	}
	266
22287b0b TS	267	static int rsa_set_pub_key(struct crypto_akcipher tfm, const void key,
22287b0b TS	268	unsigned int keylen)
cfc2bb32	269	{
5a7de973 TA	270	struct rsa_mpi_key *mpi_key = akcipher_tfm_ctx(tfm);
5a7de973 TA	271	struct rsa_key raw_key = {0};
6e8ec66c	272	int ret;
cfc2bb32	273
5a7de973 TA	274	/* Free the old MPI key if any */
	275	rsa_free_mpi_key(mpi_key);
	276
	277	ret = rsa_parse_pub_key(&raw_key, key, keylen);
6e8ec66c TS	278	if (ret)
	279	return ret;
	280
5a7de973 TA	281	mpi_key->e = mpi_read_raw_data(raw_key.e, raw_key.e_sz);
	282	if (!mpi_key->e)
	283	goto err;
	284
	285	mpi_key->n = mpi_read_raw_data(raw_key.n, raw_key.n_sz);
	286	if (!mpi_key->n)
	287	goto err;
	288
	289	if (rsa_check_key_length(mpi_get_size(mpi_key->n) << 3)) {
	290	rsa_free_mpi_key(mpi_key);
	291	return -EINVAL;
6e8ec66c	292	}
5a7de973 TA	293
	294	return 0;
	295
	296	err:
	297	rsa_free_mpi_key(mpi_key);
	298	return -ENOMEM;
cfc2bb32 TS	299	}
cfc2bb32 TS	300
22287b0b TS	301	static int rsa_set_priv_key(struct crypto_akcipher tfm, const void key,
	302	unsigned int keylen)
	303	{
5a7de973 TA	304	struct rsa_mpi_key *mpi_key = akcipher_tfm_ctx(tfm);
5a7de973 TA	305	struct rsa_key raw_key = {0};
22287b0b TS	306	int ret;
22287b0b TS	307
5a7de973 TA	308	/* Free the old MPI key if any */
	309	rsa_free_mpi_key(mpi_key);
	310
	311	ret = rsa_parse_priv_key(&raw_key, key, keylen);
22287b0b TS	312	if (ret)
	313	return ret;
	314
5a7de973 TA	315	mpi_key->d = mpi_read_raw_data(raw_key.d, raw_key.d_sz);
	316	if (!mpi_key->d)
	317	goto err;
	318
	319	mpi_key->e = mpi_read_raw_data(raw_key.e, raw_key.e_sz);
	320	if (!mpi_key->e)
	321	goto err;
	322
	323	mpi_key->n = mpi_read_raw_data(raw_key.n, raw_key.n_sz);
	324	if (!mpi_key->n)
	325	goto err;
	326
	327	if (rsa_check_key_length(mpi_get_size(mpi_key->n) << 3)) {
	328	rsa_free_mpi_key(mpi_key);
	329	return -EINVAL;
22287b0b	330	}
5a7de973 TA	331
	332	return 0;
	333
	334	err:
	335	rsa_free_mpi_key(mpi_key);
	336	return -ENOMEM;
22287b0b TS	337	}
22287b0b TS	338
1c23b466	339	static unsigned int rsa_max_size(struct crypto_akcipher *tfm)
22287b0b	340	{
5a7de973	341	struct rsa_mpi_key *pkey = akcipher_tfm_ctx(tfm);
22287b0b	342
1c23b466	343	return mpi_get_size(pkey->n);
22287b0b TS	344	}
22287b0b TS	345
cfc2bb32 TS	346	static void rsa_exit_tfm(struct crypto_akcipher *tfm)
cfc2bb32 TS	347	{
5a7de973	348	struct rsa_mpi_key *pkey = akcipher_tfm_ctx(tfm);
cfc2bb32	349
5a7de973	350	rsa_free_mpi_key(pkey);
cfc2bb32 TS	351	}
	352
	353	static struct akcipher_alg rsa = {
	354	.encrypt = rsa_enc,
	355	.decrypt = rsa_dec,
	356	.sign = rsa_sign,
	357	.verify = rsa_verify,
22287b0b TS	358	.set_priv_key = rsa_set_priv_key,
	359	.set_pub_key = rsa_set_pub_key,
	360	.max_size = rsa_max_size,
cfc2bb32 TS	361	.exit = rsa_exit_tfm,
	362	.base = {
	363	.cra_name = "rsa",
	364	.cra_driver_name = "rsa-generic",
	365	.cra_priority = 100,
	366	.cra_module = THIS_MODULE,
5a7de973	367	.cra_ctxsize = sizeof(struct rsa_mpi_key),
cfc2bb32 TS	368	},
	369	};
	370
	371	static int rsa_init(void)
	372	{
3d5b1ecd AZ	373	int err;
	374
	375	err = crypto_register_akcipher(&rsa);
	376	if (err)
	377	return err;
	378
	379	err = crypto_register_template(&rsa_pkcs1pad_tmpl);
	380	if (err) {
	381	crypto_unregister_akcipher(&rsa);
	382	return err;
	383	}
	384
	385	return 0;
cfc2bb32 TS	386	}
	387
	388	static void rsa_exit(void)
	389	{
3d5b1ecd	390	crypto_unregister_template(&rsa_pkcs1pad_tmpl);
cfc2bb32 TS	391	crypto_unregister_akcipher(&rsa);
	392	}
	393
	394	module_init(rsa_init);
	395	module_exit(rsa_exit);
	396	MODULE_ALIAS_CRYPTO("rsa");
	397	MODULE_LICENSE("GPL");
	398	MODULE_DESCRIPTION("RSA generic algorithm");