proxmark3/client/emv/crypto.c
Oleg Moiseenko d03fb293bc Emv4 - more additions to hf emv exec
* added rsa polarssl and changed sha1 location to polarssl dir
* deleted old sha1
* added emv-tools pk files
* added polarrssl wrapper sketch to emv_tols
* added test command
* added crypto polarssl with sda test
* added crypto tests and crypto_polarssl sha logic
* added SDA,DDA,fDDA,CDA
2017-12-23 16:46:43 +01:00

180 lines
3.2 KiB
C

/*
* libopenemv - a library to work with EMV family of smart cards
* Copyright (C) 2015 Dmitry Eremin-Solenikov
*
* 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 <string.h>
static struct crypto_backend *crypto_backend;
static bool crypto_init(void)
{
if (crypto_backend)
return true;
crypto_backend = crypto_polarssl_init();
if (!crypto_backend)
return false;
return true;
}
struct crypto_hash *crypto_hash_open(enum crypto_algo_hash hash)
{
struct crypto_hash *ch;
if (!crypto_init())
return NULL;
ch = crypto_backend->hash_open(hash);
if (ch)
ch->algo = hash;
return ch;
}
void crypto_hash_close(struct crypto_hash *ch)
{
ch->close(ch);
}
void crypto_hash_write(struct crypto_hash *ch, const unsigned char *buf, size_t len)
{
ch->write(ch, buf, len);
}
unsigned char *crypto_hash_read(struct crypto_hash *ch)
{
return ch->read(ch);
}
size_t crypto_hash_get_size(const struct crypto_hash *ch)
{
return ch->get_size(ch);
}
struct crypto_pk *crypto_pk_open(enum crypto_algo_pk pk, ...)
{
struct crypto_pk *cp;
va_list vl;
if (!crypto_init())
return NULL;
va_start(vl, pk);
cp = crypto_backend->pk_open(pk, vl);
va_end(vl);
if (cp)
cp->algo = pk;
return cp;
}
struct crypto_pk *crypto_pk_open_priv(enum crypto_algo_pk pk, ...)
{
struct crypto_pk *cp;
va_list vl;
if (!crypto_init())
return NULL;
if (!crypto_backend->pk_open_priv)
return NULL;
va_start(vl, pk);
cp = crypto_backend->pk_open_priv(pk, vl);
va_end(vl);
if (cp)
cp->algo = pk;
return cp;
}
struct crypto_pk *crypto_pk_genkey(enum crypto_algo_pk pk, ...)
{
struct crypto_pk *cp;
va_list vl;
if (!crypto_init())
return NULL;
if (!crypto_backend->pk_genkey)
return NULL;
va_start(vl, pk);
cp = crypto_backend->pk_genkey(pk, vl);
va_end(vl);
if (cp)
cp->algo = pk;
return cp;
}
void crypto_pk_close(struct crypto_pk *cp)
{
cp->close(cp);
}
unsigned char *crypto_pk_encrypt(const struct crypto_pk *cp, const unsigned char *buf, size_t len, size_t *clen)
{
return cp->encrypt(cp, buf, len, clen);
}
unsigned char *crypto_pk_decrypt(const struct crypto_pk *cp, const unsigned char *buf, size_t len, size_t *clen)
{
if (!cp->decrypt) {
*clen = 0;
return NULL;
}
return cp->decrypt(cp, buf, len, clen);
}
enum crypto_algo_pk crypto_pk_get_algo(const struct crypto_pk *cp)
{
if (!cp)
return PK_INVALID;
return cp->algo;
}
size_t crypto_pk_get_nbits(const struct crypto_pk *cp)
{
if (!cp->get_nbits)
return 0;
return cp->get_nbits(cp);
}
unsigned char *crypto_pk_get_parameter(const struct crypto_pk *cp, unsigned param, size_t *plen)
{
*plen = 0;
if (!cp->get_parameter)
return NULL;
return cp->get_parameter(cp, param, plen);
}