--- old/usr/src/cmd/ssh/libssh/common/cipher.c	2016-08-16 20:41:42.144392068 -0400
+++ /dev/null	2016-08-16 20:41:42.000000000 -0400
@@ -1,585 +0,0 @@
-/*
- * Author: Tatu Ylonen <ylo@cs.hut.fi>
- * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- *                    All rights reserved
- *
- * As far as I am concerned, the code I have written for this software
- * can be used freely for any purpose.  Any derived versions of this
- * software must be clearly marked as such, and if the derived work is
- * incompatible with the protocol description in the RFC file, it must be
- * called by a name other than "ssh" or "Secure Shell".
- *
- *
- * Copyright (c) 1999 Niels Provos.  All rights reserved.
- * Copyright (c) 1999, 2000 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.
- */
-
-/*
- * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
- * Use is subject to license terms.
- */
-
-#include "includes.h"
-RCSID("$OpenBSD: cipher.c,v 1.61 2002/07/12 15:50:17 markus Exp $");
-
-#include "xmalloc.h"
-#include "log.h"
-#include "cipher.h"
-
-#include <openssl/md5.h>
-
-/*
- * Symmetric ciphers can be offloaded to any engine through the EVP API only.
- * However, OpenSSL doesn't offer AES in counter mode through EVP. So, we must
- * define our own EVP functions.
- */
-extern const EVP_CIPHER *evp_aes_128_ctr(void);
-extern const EVP_CIPHER *evp_aes_192_ctr(void);
-extern const EVP_CIPHER *evp_aes_256_ctr(void);
-extern void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);
-
-static const EVP_CIPHER *evp_ssh1_3des(void);
-static const EVP_CIPHER *evp_ssh1_bf(void);
-
-struct Cipher {
-	char	*name;
-	int	number;		/* for ssh1 only */
-	u_int	block_size;
-	u_int	key_len;
-	u_int	discard_len;
-	const EVP_CIPHER	*(*evptype)(void);
-} ciphers[] = {
-	{ "none",	  SSH_CIPHER_NONE,	8,  0,	  0, EVP_enc_null },
-	{ "des",	  SSH_CIPHER_DES,	8,  8,	  0, EVP_des_cbc },
-	{ "3des",	  SSH_CIPHER_3DES,	8, 16,	  0, evp_ssh1_3des },
-	{ "blowfish",	  SSH_CIPHER_BLOWFISH,  8, 32,	  0, evp_ssh1_bf },
-	{ "3des-cbc",	  SSH_CIPHER_SSH2,	8, 24,	  0, EVP_des_ede3_cbc },
-	{ "blowfish-cbc", SSH_CIPHER_SSH2,	8, 16,	  0, EVP_bf_cbc },
-#ifdef SOLARIS_SSH_ENABLE_CAST5_128
-	{ "cast128-cbc",  SSH_CIPHER_SSH2,	8, 16,	  0, EVP_cast5_cbc },
-#endif /* SOLARIS_SSH_ENABLE_CAST5_128 */
-	{ "arcfour",	  SSH_CIPHER_SSH2,	8, 16,	  0, EVP_rc4 },
-	{ "arcfour128",	  SSH_CIPHER_SSH2,	8, 16, 1536, EVP_rc4 },
-	{ "arcfour256",	  SSH_CIPHER_SSH2,	8, 32, 1536, EVP_rc4 },
-	{ "aes128-cbc",	  SSH_CIPHER_SSH2,     16, 16,	  0, EVP_aes_128_cbc },
-	{ "aes192-cbc",	  SSH_CIPHER_SSH2,     16, 24,	  0, EVP_aes_192_cbc },
-	{ "aes256-cbc",	  SSH_CIPHER_SSH2,     16, 32,	  0, EVP_aes_256_cbc },
-	{ "aes128-ctr",	  SSH_CIPHER_SSH2,     16, 16,	  0, evp_aes_128_ctr },
-	{ "aes192-ctr",	  SSH_CIPHER_SSH2,     16, 24,	  0, evp_aes_192_ctr },
-	{ "aes256-ctr",	  SSH_CIPHER_SSH2,     16, 32,	  0, evp_aes_256_ctr },
-	{ NULL,		  SSH_CIPHER_ILLEGAL,	0,  0,	  0, NULL }
-};
-
-/*--*/
-
-u_int
-cipher_blocksize(Cipher *c)
-{
-	return (c->block_size);
-}
-
-u_int
-cipher_keylen(Cipher *c)
-{
-	return (c->key_len);
-}
-
-u_int
-cipher_get_number(Cipher *c)
-{
-	return (c->number);
-}
-
-u_int
-cipher_mask_ssh1(int client)
-{
-	u_int mask = 0;
-	mask |= 1 << SSH_CIPHER_3DES;		/* Mandatory */
-	mask |= 1 << SSH_CIPHER_BLOWFISH;
-	if (client) {
-		mask |= 1 << SSH_CIPHER_DES;
-	}
-	return mask;
-}
-
-Cipher *
-cipher_by_name(const char *name)
-{
-	Cipher *c;
-	for (c = ciphers; c->name != NULL; c++)
-		if (strcasecmp(c->name, name) == 0)
-			return c;
-	return NULL;
-}
-
-Cipher *
-cipher_by_number(int id)
-{
-	Cipher *c;
-	for (c = ciphers; c->name != NULL; c++)
-		if (c->number == id)
-			return c;
-	return NULL;
-}
-
-#define	CIPHER_SEP	","
-int
-ciphers_valid(const char *names)
-{
-	Cipher *c;
-	char *ciphers, *cp;
-	char *p;
-
-	if (names == NULL || strcmp(names, "") == 0)
-		return 0;
-	ciphers = cp = xstrdup(names);
-	for ((p = strsep(&cp, CIPHER_SEP)); p && *p != '\0';
-	    (p = strsep(&cp, CIPHER_SEP))) {
-		c = cipher_by_name(p);
-		if (c == NULL || c->number != SSH_CIPHER_SSH2) {
-			debug("bad cipher %s [%s]", p, names);
-			xfree(ciphers);
-			return 0;
-		} else {
-			debug3("cipher ok: %s [%s]", p, names);
-		}
-	}
-	debug3("ciphers ok: [%s]", names);
-	xfree(ciphers);
-	return 1;
-}
-
-/*
- * Parses the name of the cipher.  Returns the number of the corresponding
- * cipher, or -1 on error.
- */
-
-int
-cipher_number(const char *name)
-{
-	Cipher *c;
-	if (name == NULL)
-		return -1;
-	c = cipher_by_name(name);
-	return (c==NULL) ? -1 : c->number;
-}
-
-char *
-cipher_name(int id)
-{
-	Cipher *c = cipher_by_number(id);
-	return (c==NULL) ? "<unknown>" : c->name;
-}
-
-void
-cipher_init(CipherContext *cc, Cipher *cipher,
-    const u_char *key, u_int keylen, const u_char *iv, u_int ivlen,
-    int encrypt)
-{
-	static int dowarn = 1;
-	const EVP_CIPHER *type;
-	int klen;
-	u_char *junk, *discard;
-
-	if (cipher->number == SSH_CIPHER_DES) {
-		if (dowarn) {
-			error("Warning: use of DES is strongly discouraged "
-			    "due to cryptographic weaknesses");
-			dowarn = 0;
-		}
-		if (keylen > 8)
-			keylen = 8;
-	}
-	cc->plaintext = (cipher->number == SSH_CIPHER_NONE);
-
-	if (keylen < cipher->key_len)
-		fatal("cipher_init: key length %d is insufficient for %s.",
-		    keylen, cipher->name);
-	if (iv != NULL && ivlen < cipher->block_size)
-		fatal("cipher_init: iv length %d is insufficient for %s.",
-		    ivlen, cipher->name);
-	cc->cipher = cipher;
-
-	type = (*cipher->evptype)();
-
-	EVP_CIPHER_CTX_init(&cc->evp);
-	/*
-	 * cc->evp is of type EVP_CIPHER_CTX and its key_len will be set to the
-	 * default value here for the cipher type. If the requested key length
-	 * is different from the default value we will call EVP_CipherInit()
-	 * again, see below.
-	 */
-	if (EVP_CipherInit(&cc->evp, type, NULL, (u_char *)iv,
-	    (encrypt == CIPHER_ENCRYPT)) == 0)
-		fatal("cipher_init: EVP_CipherInit failed for %s",
-		    cipher->name);
-	klen = EVP_CIPHER_CTX_key_length(&cc->evp);
-	if (klen > 0 && keylen != klen) {
-		debug("cipher_init: set keylen (%d -> %d)", klen, keylen);
-		if (EVP_CIPHER_CTX_set_key_length(&cc->evp, keylen) == 0)
-			fatal("cipher_init: set keylen failed (%d -> %d)",
-			    klen, keylen);
-	}
-	if (EVP_CipherInit(&cc->evp, NULL, (u_char *)key, NULL, -1) == 0)
-		fatal("cipher_init: EVP_CipherInit: set key failed for %s",
-		    cipher->name);
-
-	if (cipher->discard_len > 0) {
-		junk = xmalloc(cipher->discard_len);
-		discard = xmalloc(cipher->discard_len);
-		if (EVP_Cipher(&cc->evp, discard, junk,
-		    cipher->discard_len) == 0)
-			fatal("cipher_init: EVP_Cipher failed during discard");
-		memset(discard, 0, cipher->discard_len);
-		xfree(junk);
-		xfree(discard);
-	}
-}
-
-void
-cipher_crypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len)
-{
-	if (len % cc->cipher->block_size)
-		fatal("cipher_encrypt: bad plaintext length %d", len);
-	if (EVP_Cipher(&cc->evp, dest, (u_char *)src, len) == 0)
-		fatal("evp_crypt: EVP_Cipher failed");
-}
-
-void
-cipher_cleanup(CipherContext *cc)
-{
-	if (EVP_CIPHER_CTX_cleanup(&cc->evp) == 0)
-		error("cipher_cleanup: EVP_CIPHER_CTX_cleanup failed");
-}
-
-/*
- * Selects the cipher, and keys if by computing the MD5 checksum of the
- * passphrase and using the resulting 16 bytes as the key.
- */
-
-void
-cipher_set_key_string(CipherContext *cc, Cipher *cipher,
-    const char *passphrase, int encrypt)
-{
-	MD5_CTX md;
-	u_char digest[16];
-
-	MD5_Init(&md);
-	MD5_Update(&md, (const u_char *)passphrase, strlen(passphrase));
-	MD5_Final(digest, &md);
-
-	cipher_init(cc, cipher, digest, 16, NULL, 0, encrypt);
-
-	memset(digest, 0, sizeof(digest));
-	memset(&md, 0, sizeof(md));
-}
-
-/* Implementations for other non-EVP ciphers */
-
-/*
- * 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;
-};
-
-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);
-	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);
-	}
-	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);
-	}
-	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) {
-		memset(c, 0, sizeof(*c));
-		xfree(c);
-		EVP_CIPHER_CTX_set_app_data(ctx, NULL);
-	}
-	return (1);
-}
-
-static 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;
-	ssh1_3des.flags = EVP_CIPH_CBC_MODE | EVP_CIPH_VARIABLE_LENGTH;
-	return (&ssh1_3des);
-}
-
-/*
- * SSH1 uses a variation on Blowfish, all bytes must be swapped before
- * and after encryption/decryption. Thus the swap_bytes stuff (yuk).
- */
-static void
-swap_bytes(const u_char *src, u_char *dst, int n)
-{
-	u_char c[4];
-
-	/* Process 4 bytes every lap. */
-	for (n = n / 4; n > 0; n--) {
-		c[3] = *src++;
-		c[2] = *src++;
-		c[1] = *src++;
-		c[0] = *src++;
-
-		*dst++ = c[0];
-		*dst++ = c[1];
-		*dst++ = c[2];
-		*dst++ = c[3];
-	}
-}
-
-static int (*orig_bf)(EVP_CIPHER_CTX *, u_char *, const u_char *, u_int) = NULL;
-
-static int
-bf_ssh1_cipher(EVP_CIPHER_CTX *ctx, u_char *out, const u_char *in, u_int len)
-{
-	int ret;
-
-	swap_bytes(in, out, len);
-	ret = (*orig_bf)(ctx, out, out, len);
-	swap_bytes(out, out, len);
-	return (ret);
-}
-
-static const EVP_CIPHER *
-evp_ssh1_bf(void)
-{
-	static EVP_CIPHER ssh1_bf;
-
-	memcpy(&ssh1_bf, EVP_bf_cbc(), sizeof(EVP_CIPHER));
-	orig_bf = ssh1_bf.do_cipher;
-	ssh1_bf.nid = NID_undef;
-	ssh1_bf.do_cipher = bf_ssh1_cipher;
-	ssh1_bf.key_len = 32;
-	return (&ssh1_bf);
-}
-
-/*
- * Exports an IV from the CipherContext required to export the key
- * state back from the unprivileged child to the privileged parent
- * process.
- */
-
-int
-cipher_get_keyiv_len(CipherContext *cc)
-{
-	Cipher *c = cc->cipher;
-	int ivlen;
-
-	if (c->number == SSH_CIPHER_3DES)
-		ivlen = 24;
-	else
-		ivlen = EVP_CIPHER_CTX_iv_length(&cc->evp);
-	return (ivlen);
-}
-
-void
-cipher_get_keyiv(CipherContext *cc, u_char *iv, u_int len)
-{
-	Cipher *c = cc->cipher;
-	u_char *civ = NULL;
-	int evplen;
-
-	switch (c->number) {
-	case SSH_CIPHER_SSH2:
-	case SSH_CIPHER_DES:
-	case SSH_CIPHER_BLOWFISH:
-		evplen = EVP_CIPHER_CTX_iv_length(&cc->evp);
-		if (evplen == 0)
-			return;
-		if (evplen != len)
-			fatal("%s: wrong iv length %d != %d", __func__,
-			    evplen, len);
-
-		if (c->evptype == evp_aes_128_ctr) {
-			ssh_aes_ctr_iv(&cc->evp, 0, iv, len);
-			return;
-		} else {
-			civ = cc->evp.iv;
-		}
-		break;
-	case SSH_CIPHER_3DES: {
-		struct ssh1_3des_ctx *desc;
-		if (len != 24)
-			fatal("%s: bad 3des iv length: %d", __func__, len);
-		desc = EVP_CIPHER_CTX_get_app_data(&cc->evp);
-		if (desc == NULL)
-			fatal("%s: no 3des context", __func__);
-		debug3("%s: Copying 3DES IV", __func__);
-		memcpy(iv, desc->k1.iv, 8);
-		memcpy(iv + 8, desc->k2.iv, 8);
-		memcpy(iv + 16, desc->k3.iv, 8);
-		return;
-	}
-	default:
-		fatal("%s: bad cipher %d", __func__, c->number);
-	}
-	memcpy(iv, civ, len);
-}
-
-void
-cipher_set_keyiv(CipherContext *cc, u_char *iv)
-{
-	Cipher *c = cc->cipher;
-	u_char *div = NULL;
-	int evplen = 0;
-
-	switch (c->number) {
-	case SSH_CIPHER_SSH2:
-	case SSH_CIPHER_DES:
-	case SSH_CIPHER_BLOWFISH:
-		evplen = EVP_CIPHER_CTX_iv_length(&cc->evp);
-		if (evplen == 0)
-			return;
-
-		if (c->evptype == evp_aes_128_ctr) {
-			ssh_aes_ctr_iv(&cc->evp, 1, iv, evplen);
-			return;
-		} else {
-			div = cc->evp.iv;
-		}
-		break;
-	case SSH_CIPHER_3DES: {
-		struct ssh1_3des_ctx *desc;
-		desc = EVP_CIPHER_CTX_get_app_data(&cc->evp);
-		if (desc == NULL)
-			fatal("%s: no 3des context", __func__);
-		debug3("%s: Installed 3DES IV", __func__);
-		memcpy(desc->k1.iv, iv, 8);
-		memcpy(desc->k2.iv, iv + 8, 8);
-		memcpy(desc->k3.iv, iv + 16, 8);
-		return;
-	}
-	default:
-		fatal("%s: bad cipher %d", __func__, c->number);
-	}
-	memcpy(div, iv, evplen);
-}
-
-#if OPENSSL_VERSION_NUMBER < 0x00907000L
-#define EVP_X_STATE(evp)	&(evp).c
-#define EVP_X_STATE_LEN(evp)	sizeof((evp).c)
-#else
-#define EVP_X_STATE(evp)	(evp).cipher_data
-#define EVP_X_STATE_LEN(evp)	(evp).cipher->ctx_size
-#endif
-
-int
-cipher_get_keycontext(CipherContext *cc, u_char *dat)
-{
-	int plen = 0;
-	Cipher *c = cc->cipher;
-
-	if (c->evptype == EVP_rc4) {
-		plen = EVP_X_STATE_LEN(cc->evp);
-		if (dat == NULL)
-			return (plen);
-		memcpy(dat, EVP_X_STATE(cc->evp), plen);
-	}
-	return (plen);
-}
-
-void
-cipher_set_keycontext(CipherContext *cc, u_char *dat)
-{
-	Cipher *c = cc->cipher;
-	int plen;
-
-	if (c->evptype == EVP_rc4) {
-		plen = EVP_X_STATE_LEN(cc->evp);
-		memcpy(EVP_X_STATE(cc->evp), dat, plen);
-	}
-}
