client/src/emv/crypto_backend.h

   1 //-----------------------------------------------------------------------------
   2 // Borrowed initially from https://github.com/lumag/emv-tools/
   3 // Copyright (C) 2012, 2015 Dmitry Eremin-Solenikov
   4 // Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
   5 //
   6 // This program is free software: you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation, either version 3 of the License, or
   9 // (at your option) any later version.
  10 //
  11 // This program 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
  14 // GNU General Public License for more details.
  15 //
  16 // See LICENSE.txt for the text of the license.
  17 //-----------------------------------------------------------------------------
  18 // libopenemv - a library to work with EMV family of smart cards
  19 //-----------------------------------------------------------------------------
  20
  21 #ifndef CRYPTO_BACKEND_H
  22 #define CRYPTO_BACKEND_H
  23
  24 #include "crypto.h"
  25
  26 #include <stdarg.h>  // va_list
  27
  28 struct crypto_hash {
  29     enum crypto_algo_hash algo;
  30     void (*write)(struct crypto_hash *ch, const unsigned char *buf, size_t len);
  31     unsigned char *(*read)(struct crypto_hash *ch);
  32     void (*close)(struct crypto_hash *ch);
  33     size_t (*get_size)(const struct crypto_hash *ch);
  34 };
  35
  36 struct crypto_pk {
  37     enum crypto_algo_pk algo;
  38     unsigned char *(*encrypt)(const struct crypto_pk *cp, const unsigned char *buf, size_t len, size_t *clen);
  39     unsigned char *(*decrypt)(const struct crypto_pk *cp, const unsigned char *buf, size_t len, size_t *clen);
  40     unsigned char *(*get_parameter)(const struct crypto_pk *cp, unsigned param, size_t *plen);
  41     size_t (*get_nbits)(const struct crypto_pk *cp);
  42     void (*close)(struct crypto_pk *cp);
  43 };
  44
  45 struct crypto_backend {
  46     struct crypto_hash *(*hash_open)(enum crypto_algo_hash hash);
  47     struct crypto_pk *(*pk_open)(enum crypto_algo_pk pk, va_list vl);
  48     struct crypto_pk *(*pk_open_priv)(enum crypto_algo_pk pk, va_list vl);
  49     struct crypto_pk *(*pk_genkey)(enum crypto_algo_pk pk, va_list vl);
  50 };
  51
  52 struct crypto_backend *crypto_polarssl_init(void);
  53
  54 #endif