cipher-acss.c

   1 /*
   2  * Copyright (c) 2004 The OpenBSD project
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "includes.h"
  18 #include <openssl/evp.h>
  19
  20 #if !defined(EVP_CTRL_SET_ACSS_MODE) && (OPENSSL_VERSION_NUMBER >= 0x00907000L)
  21
  22 #include "acss.h"
  23
  24 #define data(ctx) ((EVP_ACSS_KEY *)(ctx)->cipher_data)
  25
  26 typedef struct {
  27         ACSS_KEY ks;
  28 } EVP_ACSS_KEY;
  29
  30 #define EVP_CTRL_SET_ACSS_MODE          0xff06
  31 #define EVP_CTRL_SET_ACSS_SUBKEY        0xff07
  32
  33 static int
  34 acss_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  35     const unsigned char *iv, int enc)
  36 {
  37         acss_setkey(&data(ctx)->ks,key,enc,ACSS_DATA);
  38         return 1;
  39 }
  40
  41 static int
  42 acss_ciph(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in,
  43     unsigned int inl)
  44 {
  45         acss(&data(ctx)->ks,inl,in,out);
  46         return 1;
  47 }
  48
  49 static int
  50 acss_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
  51 {
  52         switch(type) {
  53         case EVP_CTRL_SET_ACSS_MODE:
  54                 data(ctx)->ks.mode = arg;
  55                 return 1;
  56         case EVP_CTRL_SET_ACSS_SUBKEY:
  57                 acss_setsubkey(&data(ctx)->ks,(unsigned char *)ptr);
  58                 return 1;
  59         default:
  60                 return -1;
  61         }
  62 }
  63
  64 const EVP_CIPHER *
  65 evp_acss(void)
  66 {
  67         static EVP_CIPHER acss_cipher;
  68
  69         memset(&acss_cipher, 0, sizeof(EVP_CIPHER));
  70
  71         acss_cipher.nid = NID_undef;
  72         acss_cipher.block_size = 1;
  73         acss_cipher.key_len = 5;
  74         acss_cipher.init = acss_init_key;
  75         acss_cipher.do_cipher = acss_ciph;
  76         acss_cipher.ctx_size = sizeof(EVP_ACSS_KEY);
  77         acss_cipher.ctrl = acss_ctrl;
  78
  79         return (&acss_cipher);
  80 }
  81 #endif
  82