Home | History | Annotate | Download | only in openssh 
      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 
     87