crypto/openssh/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
  19 #include <openssl/evp.h>
  20
  21 #include <string.h>
  22
  23 #if !defined(EVP_CTRL_SET_ACSS_MODE) && (OPENSSL_VERSION_NUMBER >= 0x00907000L)
  24
  25 #include "acss.h"
  26 #include "openbsd-compat/openssl-compat.h"
  27
  28 #define data(ctx) ((EVP_ACSS_KEY *)(ctx)->cipher_data)
  29
  30 typedef struct {
  31         ACSS_KEY ks;
  32 } EVP_ACSS_KEY;
  33
  34 #define EVP_CTRL_SET_ACSS_MODE          0xff06
  35 #define EVP_CTRL_SET_ACSS_SUBKEY        0xff07
  36
  37 static int
  38 acss_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
  39     const unsigned char *iv, int enc)
  40 {
  41         acss_setkey(&data(ctx)->ks,key,enc,ACSS_DATA);
  42         return 1;
  43 }
  44
  45 static int
  46 acss_ciph(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in,
  47     LIBCRYPTO_EVP_INL_TYPE inl)
  48 {
  49         acss(&data(ctx)->ks,inl,in,out);
  50         return 1;
  51 }
  52
  53 static int
  54 acss_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
  55 {
  56         switch(type) {
  57         case EVP_CTRL_SET_ACSS_MODE:
  58                 data(ctx)->ks.mode = arg;
  59                 return 1;
  60         case EVP_CTRL_SET_ACSS_SUBKEY:
  61                 acss_setsubkey(&data(ctx)->ks,(unsigned char *)ptr);
  62                 return 1;
  63         default:
  64                 return -1;
  65         }
  66 }
  67
  68 const EVP_CIPHER *
  69 evp_acss(void)
  70 {
  71         static EVP_CIPHER acss_cipher;
  72
  73         memset(&acss_cipher, 0, sizeof(EVP_CIPHER));
  74
  75         acss_cipher.nid = NID_undef;
  76         acss_cipher.block_size = 1;
  77         acss_cipher.key_len = 5;
  78         acss_cipher.init = acss_init_key;
  79         acss_cipher.do_cipher = acss_ciph;
  80         acss_cipher.ctx_size = sizeof(EVP_ACSS_KEY);
  81         acss_cipher.ctrl = acss_ctrl;
  82
  83         return (&acss_cipher);
  84 }
  85 #endif
  86