git.zerfleddert.de Git - proxmark3-svn/blob - client/emv/crypto_backend.h

   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 #ifndef CRYPTO_BACKEND_H
  17 #define CRYPTO_BACKEND_H
  18
  19 #include "crypto.h"
  20
  21 #include <stddef.h>
  22 #include <stdarg.h>
  23
  24 struct crypto_hash {
  25         enum crypto_algo_hash algo;
  26         void (*write)(struct crypto_hash *ch, const unsigned char *buf, size_t len);
  27         unsigned char *(*read)(struct crypto_hash *ch);
  28         void (*close)(struct crypto_hash *ch);
  29         size_t (*get_size)(const struct crypto_hash *ch);
  30 };
  31
  32 struct crypto_pk {
  33         enum crypto_algo_pk algo;
  34         unsigned char *(*encrypt)(const struct crypto_pk *cp, const unsigned char *buf, size_t len, size_t *clen);
  35         unsigned char *(*decrypt)(const struct crypto_pk *cp, const unsigned char *buf, size_t len, size_t *clen);
  36         unsigned char *(*get_parameter)(const struct crypto_pk *cp, unsigned param, size_t *plen);
  37         size_t (*get_nbits)(const struct crypto_pk *cp);
  38         void (*close)(struct crypto_pk *cp);
  39 };
  40
  41 struct crypto_backend {
  42         struct crypto_hash *(*hash_open)(enum crypto_algo_hash hash);
  43         struct crypto_pk *(*pk_open)(enum crypto_algo_pk pk, va_list vl);
  44         struct crypto_pk *(*pk_open_priv)(enum crypto_algo_pk pk, va_list vl);
  45         struct crypto_pk *(*pk_genkey)(enum crypto_algo_pk pk, va_list vl);
  46 };
  47
  48 struct crypto_backend *crypto_polarssl_init(void);
  49
  50 #endif