diff options
author | djm@openbsd.org <djm@openbsd.org> | 2017-04-30 23:15:04 +0000 |
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committer | Damien Miller <djm@mindrot.org> | 2017-05-01 10:04:58 +1000 |
commit | cdccebdf85204bf7542b7fcc1aa2ea3f36661833 (patch) | |
tree | fd07acdcdebd7da5dc027e58261a446a807466ba /cipher-3des1.c | |
parent | 97f4d3083b036ce3e68d6346a6140a22123d5864 (diff) |
upstream commit
remove SSHv1 ciphers; ok markus@
Upstream-ID: e5ebc5e540d7f23a8c1266db1839794d4d177890
Diffstat (limited to 'cipher-3des1.c')
-rw-r--r-- | cipher-3des1.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/cipher-3des1.c b/cipher-3des1.c deleted file mode 100644 index 9fcc2785..00000000 --- a/cipher-3des1.c +++ /dev/null @@ -1,158 +0,0 @@ -/* $OpenBSD: cipher-3des1.c,v 1.12 2015/01/14 10:24:42 markus Exp $ */ -/* - * Copyright (c) 2003 Markus Friedl. All rights reserved. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * 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" - -#ifdef WITH_SSH1 - -#include <sys/types.h> -#include <string.h> -#include <openssl/evp.h> - -#include "ssherr.h" - -/* - * 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); -int 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) { - if ((c = calloc(1, sizeof(*c))) == NULL) - return 0; - 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); - 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) { - explicit_bzero(c, sizeof(*c)); - free(c); - EVP_CIPHER_CTX_set_app_data(ctx, NULL); - return 0; - } - return 1; -} - -static int -ssh1_3des_cbc(EVP_CIPHER_CTX *ctx, u_char *dest, const u_char *src, size_t len) -{ - struct ssh1_3des_ctx *c; - - if ((c = EVP_CIPHER_CTX_get_app_data(ctx)) == NULL) - return 0; - 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; - 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); - explicit_bzero(c, sizeof(*c)); - free(c); - EVP_CIPHER_CTX_set_app_data(ctx, NULL); - } - return 1; -} - -int -ssh1_3des_iv(EVP_CIPHER_CTX *evp, int doset, u_char *iv, int len) -{ - struct ssh1_3des_ctx *c; - - if (len != 24) - return SSH_ERR_INVALID_ARGUMENT; - if ((c = EVP_CIPHER_CTX_get_app_data(evp)) == NULL) - return SSH_ERR_INTERNAL_ERROR; - if (doset) { - memcpy(c->k1.iv, iv, 8); - memcpy(c->k2.iv, iv + 8, 8); - memcpy(c->k3.iv, iv + 16, 8); - } else { - memcpy(iv, c->k1.iv, 8); - memcpy(iv + 8, c->k2.iv, 8); - memcpy(iv + 16, c->k3.iv, 8); - } - return 0; -} - -const EVP_CIPHER * -evp_ssh1_3des(void) -{ - static EVP_CIPHER ssh1_3des; - - memset(&ssh1_3des, 0, sizeof(ssh1_3des)); - 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; - ssh1_3des.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH; - return &ssh1_3des; -} -#endif /* WITH_SSH1 */ |