[proxmark3-svn] / client / emv / crypto_polarssl.c

/*
 * libopenemv - a library to work with EMV family of smart cards
 * Copyright (C) 2015 Dmitry Eremin-Solenikov
 * Copyright (C) 2017 Merlok
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
 * Lesser General Public License for more details.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "crypto.h"
#include "crypto_backend.h"

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>

#include "rsa.h"
#include "sha1.h"

struct crypto_hash_polarssl {
	struct crypto_hash ch;
	sha1_context ctx;
};

static void crypto_hash_polarssl_close(struct crypto_hash *_ch)
{
	struct crypto_hash_polarssl *ch = (struct crypto_hash_polarssl *)_ch;

	free(ch);
}

static void crypto_hash_polarssl_write(struct crypto_hash *_ch, const unsigned char *buf, size_t len)
{
	struct crypto_hash_polarssl *ch = (struct crypto_hash_polarssl *)_ch;

	sha1_update(&(ch->ctx), buf, len);
}

static unsigned char *crypto_hash_polarssl_read(struct crypto_hash *_ch)
{
	struct crypto_hash_polarssl *ch = (struct crypto_hash_polarssl *)_ch;

	static unsigned char sha1sum[20];
	sha1_finish(&(ch->ctx), sha1sum);
	return sha1sum;
}

static size_t crypto_hash_polarssl_get_size(const struct crypto_hash *ch)
{
	if (ch->algo == HASH_SHA_1)
		return 20;
	else
		return 0;
}

static struct crypto_hash *crypto_hash_polarssl_open(enum crypto_algo_hash hash)
{
	if (hash != HASH_SHA_1)
		return NULL;

	struct crypto_hash_polarssl *ch = malloc(sizeof(*ch));

	sha1_starts(&(ch->ctx));

	ch->ch.write = crypto_hash_polarssl_write;
	ch->ch.read = crypto_hash_polarssl_read;
	ch->ch.close = crypto_hash_polarssl_close;
	ch->ch.get_size = crypto_hash_polarssl_get_size;

	return &ch->ch;
}

struct crypto_pk_polarssl {
	struct crypto_pk cp;
	rsa_context ctx;
};

static struct crypto_pk *crypto_pk_polarssl_open_rsa(va_list vl)
{
	struct crypto_pk_polarssl *cp = malloc(sizeof(*cp));
	memset(cp, 0x00, sizeof(*cp));

	char *mod = va_arg(vl, char *);	 // N
	int modlen = va_arg(vl, size_t);
	char *exp = va_arg(vl, char *);	 // E
	int explen = va_arg(vl, size_t);

	rsa_init(&cp->ctx, RSA_PKCS_V15, 0);
	
	cp->ctx.len = modlen; // size(N) in bytes
	mpi_read_binary(&cp->ctx.N, (const unsigned char *)mod, modlen);
	mpi_read_binary(&cp->ctx.E, (const unsigned char *)exp, explen);
	
	int res = rsa_check_pubkey(&cp->ctx);
	if(res != 0) {
		fprintf(stderr, "PolarSSL public key error res=%x exp=%d mod=%d.\n", res * -1, explen, modlen);

		return NULL;
	}

	return &cp->cp;
}

static struct crypto_pk *crypto_pk_polarssl_open_priv_rsa(va_list vl)
{
	struct crypto_pk_polarssl *cp = malloc(sizeof(*cp));
	memset(cp, 0x00, sizeof(*cp));
	char *mod = va_arg(vl, char *);
	int modlen = va_arg(vl, size_t);
	char *exp = va_arg(vl, char *);
	int explen = va_arg(vl, size_t);
	char *d = va_arg(vl, char *);
	int dlen = va_arg(vl, size_t);
	char *p = va_arg(vl, char *);
	int plen = va_arg(vl, size_t);
	char *q = va_arg(vl, char *);
	int qlen = va_arg(vl, size_t);
	char *dp = va_arg(vl, char *);
	int dplen = va_arg(vl, size_t);
	char *dq = va_arg(vl, char *);
	int dqlen = va_arg(vl, size_t);
	// calc QP via Q and P
//	char *inv = va_arg(vl, char *);
//	int invlen = va_arg(vl, size_t);	
	
	rsa_init(&cp->ctx, RSA_PKCS_V15, 0);
	
	cp->ctx.len = modlen; // size(N) in bytes
	mpi_read_binary(&cp->ctx.N,  (const unsigned char *)mod, modlen);
	mpi_read_binary(&cp->ctx.E,  (const unsigned char *)exp, explen);

	mpi_read_binary(&cp->ctx.D,  (const unsigned char *)d, dlen);
	mpi_read_binary(&cp->ctx.P,  (const unsigned char *)p, plen);
	mpi_read_binary(&cp->ctx.Q,  (const unsigned char *)q, qlen);
	mpi_read_binary(&cp->ctx.DP, (const unsigned char *)dp, dplen);
	mpi_read_binary(&cp->ctx.DQ, (const unsigned char *)dq, dqlen);
	mpi_inv_mod(&cp->ctx.QP, &cp->ctx.Q, &cp->ctx.P);
	
	int res = rsa_check_privkey(&cp->ctx);
	if(res != 0) {
		fprintf(stderr, "PolarSSL private key error res=%x exp=%d mod=%d.\n", res * -1, explen, modlen);
		return NULL;
	}

	return &cp->cp;
}

static int myrand(void *rng_state, unsigned char *output, size_t len) {
    size_t i;

    if(rng_state != NULL)
        rng_state = NULL;

    for( i = 0; i < len; ++i )
        output[i] = rand();
    
    return 0;
}


static struct crypto_pk *crypto_pk_polarssl_genkey_rsa(va_list vl)
{
	struct crypto_pk_polarssl *cp = malloc(sizeof(*cp));
	memset(cp, 0x00, sizeof(*cp));
	
	int transient = va_arg(vl, int);
	unsigned int nbits = va_arg(vl, unsigned int);
	unsigned int exp = va_arg(vl, unsigned int);

	if (transient) {
	}
	
	int res = rsa_gen_key(&cp->ctx, &myrand, NULL, nbits, exp);
	if (res) {
		fprintf(stderr, "PolarSSL private key generation error res=%x exp=%d nbits=%d.\n", res * -1, exp, nbits);
		return NULL;
	}
	
	return &cp->cp;
}

static void crypto_pk_polarssl_close(struct crypto_pk *_cp)
{
	struct crypto_pk_polarssl *cp = (struct crypto_pk_polarssl *)_cp;

	rsa_free(&cp->ctx);
	free(cp);
}

static unsigned char *crypto_pk_polarssl_encrypt(const struct crypto_pk *_cp, const unsigned char *buf, size_t len, size_t *clen)
{
	struct crypto_pk_polarssl *cp = (struct crypto_pk_polarssl *)_cp;
	int res;
	unsigned char *result;
	
	*clen = 0;
	size_t keylen = mpi_size(&cp->ctx.N);

	result = malloc(keylen);
	if (!result) {
		printf("RSA encrypt failed. Can't allocate result memory.\n");
		return NULL;
	}

	res = rsa_public(&cp->ctx, buf, result);
	if(res) {
		printf("RSA encrypt failed. Error: %x data len: %zd key len: %zd\n", res * -1, len, keylen);
		return NULL;
	}
	
	*clen = keylen;
	
	return result;
}

static unsigned char *crypto_pk_polarssl_decrypt(const struct crypto_pk *_cp, const unsigned char *buf, size_t len, size_t *clen)
{
	struct crypto_pk_polarssl *cp = (struct crypto_pk_polarssl *)_cp;
	int res;
	unsigned char *result;
	
	*clen = 0;
	size_t keylen = mpi_size(&cp->ctx.N);

	result = malloc(keylen);
	if (!result) {
		printf("RSA encrypt failed. Can't allocate result memory.\n");
		return NULL;
	}

	res = rsa_private(&cp->ctx, buf, result); // CHECK???
	if(res) {
		printf("RSA decrypt failed. Error: %x data len: %zd key len: %zd\n", res * -1, len, keylen);
		return NULL;
	}
	
	*clen = keylen;
	
	return result;
}

static size_t crypto_pk_polarssl_get_nbits(const struct crypto_pk *_cp)
{
	struct crypto_pk_polarssl *cp = (struct crypto_pk_polarssl *)_cp;

	return cp->ctx.len * 8;
return 0;
}

static unsigned char *crypto_pk_polarssl_get_parameter(const struct crypto_pk *_cp, unsigned param, size_t *plen)
{
	struct crypto_pk_polarssl *cp = (struct crypto_pk_polarssl *)_cp;
	unsigned char *result = NULL;
	switch(param){
		// mod
		case 0:
			*plen = mpi_size(&cp->ctx.N);
			result = malloc(*plen);
			memset(result, 0x00, *plen);
			mpi_write_binary(&cp->ctx.N, result, *plen);
			break;
		// exp
		case 1:
			*plen = mpi_size(&cp->ctx.E);
			result = malloc(*plen);
			memset(result, 0x00, *plen);
			mpi_write_binary(&cp->ctx.E, result, *plen);
			break;
		default:
			printf("Error get parameter. Param=%d", param);
			break;
	}
	
	return result;
}

static struct crypto_pk *crypto_pk_polarssl_open(enum crypto_algo_pk pk, va_list vl)
{
	struct crypto_pk *cp;

	if (pk == PK_RSA)
		cp = crypto_pk_polarssl_open_rsa(vl);
	else
		return NULL;

	cp->close = crypto_pk_polarssl_close;
	cp->encrypt = crypto_pk_polarssl_encrypt;
	cp->get_parameter = crypto_pk_polarssl_get_parameter;
	cp->get_nbits = crypto_pk_polarssl_get_nbits;

	return cp;
}

static struct crypto_pk *crypto_pk_polarssl_open_priv(enum crypto_algo_pk pk, va_list vl)
{
	struct crypto_pk *cp;

	if (pk == PK_RSA)
		cp = crypto_pk_polarssl_open_priv_rsa(vl);
	else
		return NULL;

	cp->close = crypto_pk_polarssl_close;
	cp->encrypt = crypto_pk_polarssl_encrypt;
	cp->decrypt = crypto_pk_polarssl_decrypt;
	cp->get_parameter = crypto_pk_polarssl_get_parameter;
	cp->get_nbits = crypto_pk_polarssl_get_nbits;

	return cp;
}

static struct crypto_pk *crypto_pk_polarssl_genkey(enum crypto_algo_pk pk, va_list vl)
{
	struct crypto_pk *cp;

	if (pk == PK_RSA)
		cp = crypto_pk_polarssl_genkey_rsa(vl);
	else
		return NULL;

	cp->close = crypto_pk_polarssl_close;
	cp->encrypt = crypto_pk_polarssl_encrypt;
	cp->decrypt = crypto_pk_polarssl_decrypt;
	cp->get_parameter = crypto_pk_polarssl_get_parameter;
	cp->get_nbits = crypto_pk_polarssl_get_nbits;

	return cp;
}

static struct crypto_backend crypto_polarssl_backend = {
	.hash_open = crypto_hash_polarssl_open,
	.pk_open = crypto_pk_polarssl_open,
	.pk_open_priv = crypto_pk_polarssl_open_priv,
	.pk_genkey = crypto_pk_polarssl_genkey,
};

struct crypto_backend *crypto_polarssl_init(void)
{
	return &crypto_polarssl_backend;
}
Commit	Line	Data
d03fb293 OM	1	/*
	2	* libopenemv - a library to work with EMV family of smart cards
	3	* Copyright (C) 2015 Dmitry Eremin-Solenikov
	4	* Copyright (C) 2017 Merlok
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2.1 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*/
	16
	17	#ifdef HAVE_CONFIG_H
	18	#include <config.h>
	19	#endif
	20
	21	#include "crypto.h"
	22	#include "crypto_backend.h"
	23
	24	#include <stdarg.h>
	25	#include <stdio.h>
	26	#include <stdlib.h>
	27
	28	#include "rsa.h"
	29	#include "sha1.h"
	30
	31	struct crypto_hash_polarssl {
	32	struct crypto_hash ch;
	33	sha1_context ctx;
	34	};
	35
	36	static void crypto_hash_polarssl_close(struct crypto_hash *_ch)
	37	{
	38	struct crypto_hash_polarssl ch = (struct crypto_hash_polarssl )_ch;
	39
	40	free(ch);
	41	}
	42
	43	static void crypto_hash_polarssl_write(struct crypto_hash _ch, const unsigned char buf, size_t len)
	44	{
	45	struct crypto_hash_polarssl ch = (struct crypto_hash_polarssl )_ch;
	46
	47	sha1_update(&(ch->ctx), buf, len);
	48	}
	49
	50	static unsigned char crypto_hash_polarssl_read(struct crypto_hash _ch)
	51	{
	52	struct crypto_hash_polarssl ch = (struct crypto_hash_polarssl )_ch;
	53
	54	static unsigned char sha1sum[20];
	55	sha1_finish(&(ch->ctx), sha1sum);
	56	return sha1sum;
	57	}
	58
	59	static size_t crypto_hash_polarssl_get_size(const struct crypto_hash *ch)
	60	{
	61	if (ch->algo == HASH_SHA_1)
	62	return 20;
	63	else
	64	return 0;
65	}
66
67	static struct crypto_hash *crypto_hash_polarssl_open(enum crypto_algo_hash hash)
68	{
69	if (hash != HASH_SHA_1)
70	return NULL;
71
72	struct crypto_hash_polarssl ch = malloc(sizeof(ch));
73
74	sha1_starts(&(ch->ctx));
75
76	ch->ch.write = crypto_hash_polarssl_write;
77	ch->ch.read = crypto_hash_polarssl_read;
78	ch->ch.close = crypto_hash_polarssl_close;
79	ch->ch.get_size = crypto_hash_polarssl_get_size;
80
81	return &ch->ch;
82	}
83
84	struct crypto_pk_polarssl {
85	struct crypto_pk cp;
86	rsa_context ctx;
87	};
88
89	static struct crypto_pk *crypto_pk_polarssl_open_rsa(va_list vl)
90	{
91	struct crypto_pk_polarssl cp = malloc(sizeof(cp));
92	memset(cp, 0x00, sizeof(*cp));
93
94	char mod = va_arg(vl, char ); // N
95	int modlen = va_arg(vl, size_t);
96	char exp = va_arg(vl, char ); // E
97	int explen = va_arg(vl, size_t);
98
99	rsa_init(&cp->ctx, RSA_PKCS_V15, 0);
100
101	cp->ctx.len = modlen; // size(N) in bytes
102	mpi_read_binary(&cp->ctx.N, (const unsigned char *)mod, modlen);
103	mpi_read_binary(&cp->ctx.E, (const unsigned char *)exp, explen);
104
105	int res = rsa_check_pubkey(&cp->ctx);
106	if(res != 0) {
107	fprintf(stderr, "PolarSSL public key error res=%x exp=%d mod=%d.\n", res * -1, explen, modlen);
108
109	return NULL;
110	}
111
112	return &cp->cp;
113	}
114
115	static struct crypto_pk *crypto_pk_polarssl_open_priv_rsa(va_list vl)
116	{
117	struct crypto_pk_polarssl cp = malloc(sizeof(cp));
118	memset(cp, 0x00, sizeof(*cp));
119	char mod = va_arg(vl, char );
120	int modlen = va_arg(vl, size_t);
121	char exp = va_arg(vl, char );
122	int explen = va_arg(vl, size_t);
123	char d = va_arg(vl, char );
124	int dlen = va_arg(vl, size_t);
125	char p = va_arg(vl, char );
126	int plen = va_arg(vl, size_t);
127	char q = va_arg(vl, char );
128	int qlen = va_arg(vl, size_t);
129	char dp = va_arg(vl, char );
130	int dplen = va_arg(vl, size_t);
131	char dq = va_arg(vl, char );
132	int dqlen = va_arg(vl, size_t);
133	// calc QP via Q and P
134	// char inv = va_arg(vl, char );
135	// int invlen = va_arg(vl, size_t);
136
137	rsa_init(&cp->ctx, RSA_PKCS_V15, 0);
138
139	cp->ctx.len = modlen; // size(N) in bytes
140	mpi_read_binary(&cp->ctx.N, (const unsigned char *)mod, modlen);
141	mpi_read_binary(&cp->ctx.E, (const unsigned char *)exp, explen);
142
143	mpi_read_binary(&cp->ctx.D, (const unsigned char *)d, dlen);
144	mpi_read_binary(&cp->ctx.P, (const unsigned char *)p, plen);
145	mpi_read_binary(&cp->ctx.Q, (const unsigned char *)q, qlen);
146	mpi_read_binary(&cp->ctx.DP, (const unsigned char *)dp, dplen);
147	mpi_read_binary(&cp->ctx.DQ, (const unsigned char *)dq, dqlen);
148	mpi_inv_mod(&cp->ctx.QP, &cp->ctx.Q, &cp->ctx.P);
149
150	int res = rsa_check_privkey(&cp->ctx);
151	if(res != 0) {
152	fprintf(stderr, "PolarSSL private key error res=%x exp=%d mod=%d.\n", res * -1, explen, modlen);
153	return NULL;
154	}
155
156	return &cp->cp;
157	}
158
159	static int myrand(void rng_state, unsigned char output, size_t len) {
160	size_t i;
161
162	if(rng_state != NULL)
163	rng_state = NULL;
164
165	for( i = 0; i < len; ++i )
166	output[i] = rand();
167
168	return 0;
169	}
170
171
172	static struct crypto_pk *crypto_pk_polarssl_genkey_rsa(va_list vl)
173	{
174	struct crypto_pk_polarssl cp = malloc(sizeof(cp));
175	memset(cp, 0x00, sizeof(*cp));
176
177	int transient = va_arg(vl, int);
178	unsigned int nbits = va_arg(vl, unsigned int);
179	unsigned int exp = va_arg(vl, unsigned int);
180
181	if (transient) {
182	}
183
184	int res = rsa_gen_key(&cp->ctx, &myrand, NULL, nbits, exp);
185	if (res) {
186	fprintf(stderr, "PolarSSL private key generation error res=%x exp=%d nbits=%d.\n", res * -1, exp, nbits);
187	return NULL;
188	}
189
190	return &cp->cp;
191	}
192
193	static void crypto_pk_polarssl_close(struct crypto_pk *_cp)
194	{
195	struct crypto_pk_polarssl cp = (struct crypto_pk_polarssl )_cp;
196
197	rsa_free(&cp->ctx);
198	free(cp);
199	}
200
201	static unsigned char crypto_pk_polarssl_encrypt(const struct crypto_pk _cp, const unsigned char buf, size_t len, size_t clen)
202	{
203	struct crypto_pk_polarssl cp = (struct crypto_pk_polarssl )_cp;
204	int res;
205	unsigned char *result;
206
207	*clen = 0;
208	size_t keylen = mpi_size(&cp->ctx.N);
209
210	result = malloc(keylen);
211	if (!result) {
212	printf("RSA encrypt failed. Can't allocate result memory.\n");
213	return NULL;
214	}
215
216	res = rsa_public(&cp->ctx, buf, result);
217	if(res) {
b838c4ff	218	printf("RSA encrypt failed. Error: %x data len: %zd key len: %zd\n", res * -1, len, keylen);
d03fb293 OM	219	return NULL;
	220	}
	221
	222	*clen = keylen;
	223
	224	return result;
	225	}
	226
	227	static unsigned char crypto_pk_polarssl_decrypt(const struct crypto_pk _cp, const unsigned char buf, size_t len, size_t clen)
	228	{
	229	struct crypto_pk_polarssl cp = (struct crypto_pk_polarssl )_cp;
	230	int res;
	231	unsigned char *result;
	232
	233	*clen = 0;
	234	size_t keylen = mpi_size(&cp->ctx.N);
	235
	236	result = malloc(keylen);
	237	if (!result) {
	238	printf("RSA encrypt failed. Can't allocate result memory.\n");
	239	return NULL;
	240	}
	241
	242	res = rsa_private(&cp->ctx, buf, result); // CHECK???
	243	if(res) {
b838c4ff	244	printf("RSA decrypt failed. Error: %x data len: %zd key len: %zd\n", res * -1, len, keylen);
d03fb293 OM	245	return NULL;
	246	}
	247
	248	*clen = keylen;
	249
	250	return result;
	251	}
	252
	253	static size_t crypto_pk_polarssl_get_nbits(const struct crypto_pk *_cp)
	254	{
	255	struct crypto_pk_polarssl cp = (struct crypto_pk_polarssl )_cp;
	256
	257	return cp->ctx.len * 8;
	258	return 0;
	259	}
	260
	261	static unsigned char crypto_pk_polarssl_get_parameter(const struct crypto_pk _cp, unsigned param, size_t *plen)
	262	{
	263	struct crypto_pk_polarssl cp = (struct crypto_pk_polarssl )_cp;
	264	unsigned char *result = NULL;
	265	switch(param){
	266	// mod
	267	case 0:
	268	*plen = mpi_size(&cp->ctx.N);
	269	result = malloc(*plen);
	270	memset(result, 0x00, *plen);
	271	mpi_write_binary(&cp->ctx.N, result, *plen);
	272	break;
	273	// exp
	274	case 1:
	275	*plen = mpi_size(&cp->ctx.E);
	276	result = malloc(*plen);
	277	memset(result, 0x00, *plen);
	278	mpi_write_binary(&cp->ctx.E, result, *plen);
	279	break;
	280	default:
	281	printf("Error get parameter. Param=%d", param);
	282	break;
	283	}
	284
	285	return result;
	286	}
	287
	288	static struct crypto_pk *crypto_pk_polarssl_open(enum crypto_algo_pk pk, va_list vl)
	289	{
	290	struct crypto_pk *cp;
	291
	292	if (pk == PK_RSA)
	293	cp = crypto_pk_polarssl_open_rsa(vl);
	294	else
	295	return NULL;
	296
	297	cp->close = crypto_pk_polarssl_close;
	298	cp->encrypt = crypto_pk_polarssl_encrypt;
	299	cp->get_parameter = crypto_pk_polarssl_get_parameter;
	300	cp->get_nbits = crypto_pk_polarssl_get_nbits;
	301
	302	return cp;
	303	}
	304
	305	static struct crypto_pk *crypto_pk_polarssl_open_priv(enum crypto_algo_pk pk, va_list vl)
	306	{
	307	struct crypto_pk *cp;
	308
309	if (pk == PK_RSA)
310	cp = crypto_pk_polarssl_open_priv_rsa(vl);
311	else
312	return NULL;
313
314	cp->close = crypto_pk_polarssl_close;
315	cp->encrypt = crypto_pk_polarssl_encrypt;
316	cp->decrypt = crypto_pk_polarssl_decrypt;
317	cp->get_parameter = crypto_pk_polarssl_get_parameter;
318	cp->get_nbits = crypto_pk_polarssl_get_nbits;
319
320	return cp;
321	}
322
323	static struct crypto_pk *crypto_pk_polarssl_genkey(enum crypto_algo_pk pk, va_list vl)
324	{
325	struct crypto_pk *cp;
326
327	if (pk == PK_RSA)
328	cp = crypto_pk_polarssl_genkey_rsa(vl);
329	else
330	return NULL;
331
332	cp->close = crypto_pk_polarssl_close;
333	cp->encrypt = crypto_pk_polarssl_encrypt;
334	cp->decrypt = crypto_pk_polarssl_decrypt;
335	cp->get_parameter = crypto_pk_polarssl_get_parameter;
336	cp->get_nbits = crypto_pk_polarssl_get_nbits;
337
338	return cp;
339	}
340
341	static struct crypto_backend crypto_polarssl_backend = {
342	.hash_open = crypto_hash_polarssl_open,
343	.pk_open = crypto_pk_polarssl_open,
344	.pk_open_priv = crypto_pk_polarssl_open_priv,
345	.pk_genkey = crypto_pk_polarssl_genkey,
346	};
347
348	struct crypto_backend *crypto_polarssl_init(void)
349	{
350	return &crypto_polarssl_backend;
351	}