diff options
Diffstat (limited to 'crypto/openssh/cipher-3des1.c')
| -rw-r--r-- | crypto/openssh/cipher-3des1.c | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/crypto/openssh/cipher-3des1.c b/crypto/openssh/cipher-3des1.c deleted file mode 100644 index fc16e20..0000000 --- a/crypto/openssh/cipher-3des1.c +++ /dev/null @@ -1,184 +0,0 @@ -/* $OpenBSD: cipher-3des1.c,v 1.6 2006/08/03 03:34:42 deraadt Exp $ */ -/* - * Copyright (c) 2003 Markus Friedl. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "includes.h" - -#include <sys/types.h> - -#include <openssl/evp.h> - -#include <stdarg.h> -#include <string.h> - -#include "xmalloc.h" -#include "log.h" - -#if OPENSSL_VERSION_NUMBER < 0x00906000L -#define SSH_OLD_EVP -#endif - -/* - * This is used by SSH1: - * - * What kind of triple DES are these 2 routines? - * - * Why is there a redundant initialization vector? - * - * If only iv3 was used, then, this would till effect have been - * outer-cbc. However, there is also a private iv1 == iv2 which - * perhaps makes differential analysis easier. On the other hand, the - * private iv1 probably makes the CRC-32 attack ineffective. This is a - * result of that there is no longer any known iv1 to use when - * choosing the X block. - */ -struct ssh1_3des_ctx -{ - EVP_CIPHER_CTX k1, k2, k3; -}; - -const EVP_CIPHER * evp_ssh1_3des(void); -void ssh1_3des_iv(EVP_CIPHER_CTX *, int, u_char *, int); - -static int -ssh1_3des_init(EVP_CIPHER_CTX *ctx, const u_char *key, const u_char *iv, - int enc) -{ - struct ssh1_3des_ctx *c; - u_char *k1, *k2, *k3; - - if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) { - c = xmalloc(sizeof(*c)); - EVP_CIPHER_CTX_set_app_data(ctx, c); - } - if (key == NULL) - return (1); - if (enc == -1) - enc = ctx->encrypt; - k1 = k2 = k3 = (u_char *) key; - k2 += 8; - if (EVP_CIPHER_CTX_key_length(ctx) >= 16+8) { - if (enc) - k3 += 16; - else - k1 += 16; - } - EVP_CIPHER_CTX_init(&c->k1); - EVP_CIPHER_CTX_init(&c->k2); - EVP_CIPHER_CTX_init(&c->k3); -#ifdef SSH_OLD_EVP - EVP_CipherInit(&c->k1, EVP_des_cbc(), k1, NULL, enc); - EVP_CipherInit(&c->k2, EVP_des_cbc(), k2, NULL, !enc); - EVP_CipherInit(&c->k3, EVP_des_cbc(), k3, NULL, enc); -#else - if (EVP_CipherInit(&c->k1, EVP_des_cbc(), k1, NULL, enc) == 0 || - EVP_CipherInit(&c->k2, EVP_des_cbc(), k2, NULL, !enc) == 0 || - EVP_CipherInit(&c->k3, EVP_des_cbc(), k3, NULL, enc) == 0) { - memset(c, 0, sizeof(*c)); - xfree(c); - EVP_CIPHER_CTX_set_app_data(ctx, NULL); - return (0); - } -#endif - return (1); -} - -static int -ssh1_3des_cbc(EVP_CIPHER_CTX *ctx, u_char *dest, const u_char *src, u_int len) -{ - struct ssh1_3des_ctx *c; - - if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) { - error("ssh1_3des_cbc: no context"); - return (0); - } -#ifdef SSH_OLD_EVP - EVP_Cipher(&c->k1, dest, (u_char *)src, len); - EVP_Cipher(&c->k2, dest, dest, len); - EVP_Cipher(&c->k3, dest, dest, len); -#else - if (EVP_Cipher(&c->k1, dest, (u_char *)src, len) == 0 || - EVP_Cipher(&c->k2, dest, dest, len) == 0 || - EVP_Cipher(&c->k3, dest, dest, len) == 0) - return (0); -#endif - return (1); -} - -static int -ssh1_3des_cleanup(EVP_CIPHER_CTX *ctx) -{ - struct ssh1_3des_ctx *c; - - if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) != NULL) { - EVP_CIPHER_CTX_cleanup(&c->k1); - EVP_CIPHER_CTX_cleanup(&c->k2); - EVP_CIPHER_CTX_cleanup(&c->k3); - memset(c, 0, sizeof(*c)); - xfree(c); - EVP_CIPHER_CTX_set_app_data(ctx, NULL); - } - return (1); -} - -void -ssh1_3des_iv(EVP_CIPHER_CTX *evp, int doset, u_char *iv, int len) -{ - struct ssh1_3des_ctx *c; - - if (len != 24) - fatal("%s: bad 3des iv length: %d", __func__, len); - if ((c = EVP_CIPHER_CTX_get_app_data(evp)) == NULL) - fatal("%s: no 3des context", __func__); - if (doset) { - debug3("%s: Installed 3DES IV", __func__); - memcpy(c->k1.iv, iv, 8); - memcpy(c->k2.iv, iv + 8, 8); - memcpy(c->k3.iv, iv + 16, 8); - } else { - debug3("%s: Copying 3DES IV", __func__); - memcpy(iv, c->k1.iv, 8); - memcpy(iv + 8, c->k2.iv, 8); - memcpy(iv + 16, c->k3.iv, 8); - } -} - -const EVP_CIPHER * -evp_ssh1_3des(void) -{ - static EVP_CIPHER ssh1_3des; - - memset(&ssh1_3des, 0, sizeof(EVP_CIPHER)); - ssh1_3des.nid = NID_undef; - ssh1_3des.block_size = 8; - ssh1_3des.iv_len = 0; - ssh1_3des.key_len = 16; - ssh1_3des.init = ssh1_3des_init; - ssh1_3des.cleanup = ssh1_3des_cleanup; - ssh1_3des.do_cipher = ssh1_3des_cbc; -#ifndef SSH_OLD_EVP - ssh1_3des.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH; -#endif - return (&ssh1_3des); -} |
