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      1 /* ppp-crypo-priv.h - Crypto private data structures
      2  *
      3  * Copyright (c) 2022 Eivind Nss. All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  *
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in
     14  *    the documentation and/or other materials provided with the
     15  *    distribution.
     16  *
     17  * 3. The name(s) of the authors of this software must not be used to
     18  *    endorse or promote products derived from this software without
     19  *    prior written permission.
     20  *
     21  * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
     22  * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
     23  * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
     24  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     25  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
     26  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
     27  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     28  */
     29 #ifndef PPP_CRYPTO_PRIV_H
     30 #define PPP_CRYPTO_PRIV_H
     31 
     32 #include "crypto.h"
     33 
     34 #define MAX_KEY_SIZE 32
     35 #define MAX_IV_SIZE 32
     36 
     37 struct _PPP_MD
     38 {
     39     int  (*init_fn)(PPP_MD_CTX *ctx);
     40     int  (*update_fn)(PPP_MD_CTX *ctx, const void *data, size_t cnt);
     41     int  (*final_fn)(PPP_MD_CTX *ctx, unsigned char *out, unsigned int *outlen);
     42     void (*clean_fn)(PPP_MD_CTX *ctx);
     43 };
     44 
     45 struct _PPP_MD_CTX
     46 {
     47     PPP_MD md;
     48     void *priv;
     49 };
     50 
     51 struct _PPP_CIPHER
     52 {
     53     int  (*init_fn)(PPP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv);
     54     int  (*update_fn)(PPP_CIPHER_CTX *ctx, unsigned char *out, int *outl, const unsigned char *in, int inl);
     55     int  (*final_fn)(PPP_CIPHER_CTX *ctx, unsigned char *out, int *outl);
     56     void (*clean_fn)(PPP_CIPHER_CTX *ctx);
     57 };
     58 
     59 struct _PPP_CIPHER_CTX
     60 {
     61     PPP_CIPHER cipher;
     62     unsigned char key[MAX_KEY_SIZE];
     63     unsigned char iv[MAX_IV_SIZE];
     64     int is_encr;
     65     void *priv;
     66 };
     67 
     68 
     69 #endif
     70