git.zerfleddert.de Git - proxmark3-svn/blame

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	*
	5	* This library is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU Lesser General Public
	7	* License as published by the Free Software Foundation; either
	8	* version 2.1 of the License, or (at your option) any later version.
	9	*
	10	* This library is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* Lesser General Public License for more details.
	14	*/
	15
	16	#ifdef HAVE_CONFIG_H
	17	#include <config.h>
	18	#endif
	19
	20	#include "crypto.h"
	21	#include "crypto_backend.h"
	22
	23	#include <string.h>
	24
	25	static struct crypto_backend *crypto_backend;
	26
	27	static bool crypto_init(void)
	28	{
	29	if (crypto_backend)
	30	return true;
	31
	32	crypto_backend = crypto_polarssl_init();
	33
	34	if (!crypto_backend)
	35	return false;
	36
	37	return true;
	38	}
	39
	40	struct crypto_hash *crypto_hash_open(enum crypto_algo_hash hash)
	41	{
	42	struct crypto_hash *ch;
	43
	44	if (!crypto_init())
	45	return NULL;
	46
	47	ch = crypto_backend->hash_open(hash);
	48	if (ch)
	49	ch->algo = hash;
	50
	51	return ch;
	52	}
	53
	54	void crypto_hash_close(struct crypto_hash *ch)
	55	{
	56	ch->close(ch);
	57	}
	58
	59	void crypto_hash_write(struct crypto_hash ch, const unsigned char buf, size_t len)
	60	{
	61	ch->write(ch, buf, len);
	62	}
	63
	64	unsigned char crypto_hash_read(struct crypto_hash ch)
65	{
66	return ch->read(ch);
67	}
68
69	size_t crypto_hash_get_size(const struct crypto_hash *ch)
70	{
71	return ch->get_size(ch);
72	}
73
74	struct crypto_pk *crypto_pk_open(enum crypto_algo_pk pk, ...)
75	{
76	struct crypto_pk *cp;
77	va_list vl;
78
79	if (!crypto_init())
80	return NULL;
81
82	va_start(vl, pk);
83	cp = crypto_backend->pk_open(pk, vl);
84	va_end(vl);
85
86	if (cp)
87	cp->algo = pk;
88
89	return cp;
90	}
91
92	struct crypto_pk *crypto_pk_open_priv(enum crypto_algo_pk pk, ...)
93	{
94	struct crypto_pk *cp;
95	va_list vl;
96
97	if (!crypto_init())
98	return NULL;
99
100	if (!crypto_backend->pk_open_priv)
101	return NULL;
102
103	va_start(vl, pk);
104	cp = crypto_backend->pk_open_priv(pk, vl);
105	va_end(vl);
106
107	if (cp)
108	cp->algo = pk;
109
110	return cp;
111	}
112
113	struct crypto_pk *crypto_pk_genkey(enum crypto_algo_pk pk, ...)
114	{
115	struct crypto_pk *cp;
116	va_list vl;
117
118	if (!crypto_init())
119	return NULL;
120
121	if (!crypto_backend->pk_genkey)
122	return NULL;
123
124	va_start(vl, pk);
125	cp = crypto_backend->pk_genkey(pk, vl);
126	va_end(vl);
127
128	if (cp)
129	cp->algo = pk;
130
131	return cp;
132	}
133
134	void crypto_pk_close(struct crypto_pk *cp)
135	{
136	cp->close(cp);
137	}
138
139	unsigned char crypto_pk_encrypt(const struct crypto_pk cp, const unsigned char buf, size_t len, size_t clen)
140	{
141	return cp->encrypt(cp, buf, len, clen);
142	}
143
144	unsigned char crypto_pk_decrypt(const struct crypto_pk cp, const unsigned char buf, size_t len, size_t clen)
145	{
146	if (!cp->decrypt) {
147	*clen = 0;
148
149	return NULL;
150	}
151
152	return cp->decrypt(cp, buf, len, clen);
153	}
154
155	enum crypto_algo_pk crypto_pk_get_algo(const struct crypto_pk *cp)
156	{
157	if (!cp)
158	return PK_INVALID;
159
160	return cp->algo;
161	}
162
163	size_t crypto_pk_get_nbits(const struct crypto_pk *cp)
164	{
165	if (!cp->get_nbits)
166	return 0;
167
168	return cp->get_nbits(cp);
169	}
170
171	unsigned char crypto_pk_get_parameter(const struct crypto_pk cp, unsigned param, size_t *plen)
172	{
173	*plen = 0;
174
175	if (!cp->get_parameter)
176	return NULL;
177
178	return cp->get_parameter(cp, param, plen);
179	}