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b0fb6872ed
[atomicio.c auth-bsdauth.c auth-chall.c auth-krb5.c auth-options.c]
[auth-pam.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c auth-rsa.c]
[auth-shadow.c auth-skey.c auth.c auth1.c auth2-chall.c]
[auth2-hostbased.c auth2-kbdint.c auth2-none.c auth2-passwd.c]
[auth2-pubkey.c auth2.c authfd.c authfile.c bufaux.c buffer.c]
[canohost.c channels.c cipher-3des1.c cipher-acss.c cipher-aes.c]
[cipher-bf1.c cipher-ctr.c cipher.c cleanup.c clientloop.c compat.c]
[compress.c deattack.c dh.c dispatch.c dns.c entropy.c fatal.c]
[groupaccess.c hostfile.c includes.h kex.c kexdh.c kexdhc.c]
[kexdhs.c kexgex.c kexgexc.c kexgexs.c key.c log.c loginrec.c]
[loginrec.h logintest.c mac.c match.c md-sha256.c md5crypt.c misc.c]
[monitor.c monitor_fdpass.c monitor_mm.c monitor_wrap.c msg.c]
[nchan.c packet.c progressmeter.c readconf.c readpass.c rsa.c]
[scard.c scp.c servconf.c serverloop.c session.c sftp-client.c]
[sftp-common.c sftp-glob.c sftp-server.c sftp.c ssh-add.c]
[ssh-agent.c ssh-dss.c ssh-keygen.c ssh-keyscan.c ssh-keysign.c]
[ssh-rand-helper.c ssh-rsa.c ssh.c sshconnect.c sshconnect1.c]
[sshconnect2.c sshd.c sshlogin.c sshpty.c sshtty.c ttymodes.c]
[uidswap.c uuencode.c xmalloc.c openbsd-compat/bsd-arc4random.c]
[openbsd-compat/bsd-closefrom.c openbsd-compat/bsd-cygwin_util.c]
[openbsd-compat/bsd-getpeereid.c openbsd-compat/bsd-misc.c]
[openbsd-compat/bsd-nextstep.c openbsd-compat/bsd-snprintf.c]
[openbsd-compat/bsd-waitpid.c openbsd-compat/fake-rfc2553.c]
RCSID() can die
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/*
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* Copyright (c) 2003 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "includes.h"
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#include <openssl/evp.h>
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#include "xmalloc.h"
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#include "log.h"
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#if OPENSSL_VERSION_NUMBER < 0x00906000L
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#define SSH_OLD_EVP
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#endif
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/*
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* SSH1 uses a variation on Blowfish, all bytes must be swapped before
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* and after encryption/decryption. Thus the swap_bytes stuff (yuk).
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*/
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const EVP_CIPHER * evp_ssh1_bf(void);
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static void
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swap_bytes(const u_char *src, u_char *dst, int n)
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{
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u_char c[4];
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/* Process 4 bytes every lap. */
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for (n = n / 4; n > 0; n--) {
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c[3] = *src++;
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c[2] = *src++;
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c[1] = *src++;
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c[0] = *src++;
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*dst++ = c[0];
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*dst++ = c[1];
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*dst++ = c[2];
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*dst++ = c[3];
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}
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}
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#ifdef SSH_OLD_EVP
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static void bf_ssh1_init (EVP_CIPHER_CTX * ctx, const unsigned char *key,
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const unsigned char *iv, int enc)
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{
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if (iv != NULL)
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memcpy (&(ctx->oiv[0]), iv, 8);
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memcpy (&(ctx->iv[0]), &(ctx->oiv[0]), 8);
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if (key != NULL)
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BF_set_key (&(ctx->c.bf_ks), EVP_CIPHER_CTX_key_length (ctx),
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key);
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}
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#endif
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static int (*orig_bf)(EVP_CIPHER_CTX *, u_char *, const u_char *, u_int) = NULL;
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static int
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bf_ssh1_cipher(EVP_CIPHER_CTX *ctx, u_char *out, const u_char *in, u_int len)
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{
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int ret;
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swap_bytes(in, out, len);
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ret = (*orig_bf)(ctx, out, out, len);
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swap_bytes(out, out, len);
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return (ret);
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}
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const EVP_CIPHER *
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evp_ssh1_bf(void)
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{
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static EVP_CIPHER ssh1_bf;
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memcpy(&ssh1_bf, EVP_bf_cbc(), sizeof(EVP_CIPHER));
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orig_bf = ssh1_bf.do_cipher;
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ssh1_bf.nid = NID_undef;
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#ifdef SSH_OLD_EVP
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ssh1_bf.init = bf_ssh1_init;
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#endif
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ssh1_bf.do_cipher = bf_ssh1_cipher;
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ssh1_bf.key_len = 32;
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return (&ssh1_bf);
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}
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