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-rw-r--r--crypto/openssh/cipher.c424
1 files changed, 0 insertions, 424 deletions
diff --git a/crypto/openssh/cipher.c b/crypto/openssh/cipher.c
deleted file mode 100644
index b264063..0000000
--- a/crypto/openssh/cipher.c
+++ /dev/null
@@ -1,424 +0,0 @@
-/* $OpenBSD: cipher.c,v 1.81 2006/08/03 03:34:42 deraadt Exp $ */
-/*
- * 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.
- */
-
-#include "includes.h"
-
-#include <sys/types.h>
-
-#include <openssl/md5.h>
-
-#include <string.h>
-#include <stdarg.h>
-
-#include "xmalloc.h"
-#include "log.h"
-#include "cipher.h"
-
-/* compatibility with old or broken OpenSSL versions */
-#include "openbsd-compat/openssl-compat.h"
-
-extern const EVP_CIPHER *evp_ssh1_bf(void);
-extern const EVP_CIPHER *evp_ssh1_3des(void);
-extern void ssh1_3des_iv(EVP_CIPHER_CTX *, int, u_char *, int);
-extern const EVP_CIPHER *evp_aes_128_ctr(void);
-extern void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, u_int);
-
-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 },
- { "cast128-cbc", SSH_CIPHER_SSH2, 8, 16, 0, EVP_cast5_cbc },
- { "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 },
- { "rijndael-cbc@lysator.liu.se",
- 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_128_ctr },
- { "aes256-ctr", SSH_CIPHER_SSH2, 16, 32, 0, evp_aes_128_ctr },
-#ifdef USE_CIPHER_ACSS
- { "acss@openssh.org", SSH_CIPHER_SSH2, 16, 5, 0, EVP_acss },
-#endif
- { NULL, SSH_CIPHER_INVALID, 0, 0, 0, NULL }
-};
-
-/*--*/
-
-u_int
-cipher_blocksize(const Cipher *c)
-{
- return (c->block_size);
-}
-
-u_int
-cipher_keylen(const Cipher *c)
-{
- return (c->key_len);
-}
-
-u_int
-cipher_get_number(const 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 (strcmp(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 *cipher_list, *cp;
- char *p;
-
- if (names == NULL || strcmp(names, "") == 0)
- return 0;
- cipher_list = 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(cipher_list);
- return 0;
- } else {
- debug3("cipher ok: %s [%s]", p, names);
- }
- }
- debug3("ciphers ok: [%s]", names);
- xfree(cipher_list);
- 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;
- for (c = ciphers; c->name != NULL; c++)
- if (strcasecmp(c->name, name) == 0)
- return c->number;
- return -1;
-}
-
-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 do_encrypt)
-{
- static int dowarn = 1;
-#ifdef SSH_OLD_EVP
- EVP_CIPHER *type;
-#else
- const EVP_CIPHER *type;
- int klen;
-#endif
- 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);
-#ifdef SSH_OLD_EVP
- if (type->key_len > 0 && type->key_len != keylen) {
- debug("cipher_init: set keylen (%d -> %d)",
- type->key_len, keylen);
- type->key_len = keylen;
- }
- EVP_CipherInit(&cc->evp, type, (u_char *)key, (u_char *)iv,
- (do_encrypt == CIPHER_ENCRYPT));
-#else
- if (EVP_CipherInit(&cc->evp, type, NULL, (u_char *)iv,
- (do_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 != (u_int)klen) {
- debug2("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);
-#endif
-
- 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("evp_crypt: 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 do_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, do_encrypt);
-
- memset(digest, 0, sizeof(digest));
- memset(&md, 0, sizeof(md));
-}
-
-/*
- * 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(const 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;
- 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 ((u_int)evplen != len)
- fatal("%s: wrong iv length %d != %d", __func__,
- evplen, len);
-#ifdef USE_BUILTIN_RIJNDAEL
- if (c->evptype == evp_rijndael)
- ssh_rijndael_iv(&cc->evp, 0, iv, len);
- else
-#endif
- if (c->evptype == evp_aes_128_ctr)
- ssh_aes_ctr_iv(&cc->evp, 0, iv, len);
- else
- memcpy(iv, cc->evp.iv, len);
- break;
- case SSH_CIPHER_3DES:
- ssh1_3des_iv(&cc->evp, 0, iv, 24);
- break;
- default:
- fatal("%s: bad cipher %d", __func__, c->number);
- }
-}
-
-void
-cipher_set_keyiv(CipherContext *cc, u_char *iv)
-{
- Cipher *c = cc->cipher;
- 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;
-#ifdef USE_BUILTIN_RIJNDAEL
- if (c->evptype == evp_rijndael)
- ssh_rijndael_iv(&cc->evp, 1, iv, evplen);
- else
-#endif
- if (c->evptype == evp_aes_128_ctr)
- ssh_aes_ctr_iv(&cc->evp, 1, iv, evplen);
- else
- memcpy(cc->evp.iv, iv, evplen);
- break;
- case SSH_CIPHER_3DES:
- ssh1_3des_iv(&cc->evp, 1, iv, 24);
- break;
- default:
- fatal("%s: bad cipher %d", __func__, c->number);
- }
-}
-
-#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(const CipherContext *cc, u_char *dat)
-{
- Cipher *c = cc->cipher;
- int plen = 0;
-
- if (c->evptype == EVP_rc4 || c->evptype == EVP_acss) {
- 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 || c->evptype == EVP_acss) {
- plen = EVP_X_STATE_LEN(cc->evp);
- memcpy(EVP_X_STATE(cc->evp), dat, plen);
- }
-}
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