7293 Sun Secure Shell is neither

Reviewed by: Albert Lee <trisk@omniti.com>
Reviewed by: Alex Wilson <alex.wilson@joyent.com>
Reviewed by: Alexander Pyhalov <alp@rsu.ru>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Reviewed by: Peter Tribble <peter.tribble@gmail.com>

1 files changed, 0 insertions, 624 deletions

diff --git a/usr/src/cmd/ssh/libssh/common/authfile.c b/usr/src/cmd/ssh/libssh/common/authfile.c
deleted file mode 100644
index 29076f390f..0000000000
--- a/usr/src/cmd/ssh/libssh/common/authfile.c
+++ /dev/null
@@ -1,624 +0,0 @@
-/*
- * Author: Tatu Ylonen <ylo@cs.hut.fi>
- * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- *                    All rights reserved
- * This file contains functions for reading and writing identity files, and
- * for reading the passphrase from the user.
- *
- * 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) 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"
-RCSID("$OpenBSD: authfile.c,v 1.50 2002/06/24 14:55:38 markus Exp $");
-
-#pragma ident	"%Z%%M%	%I%	%E% SMI"
-
-#include <openssl/err.h>
-#include <openssl/evp.h>
-#include <openssl/pem.h>
-
-#include "cipher.h"
-#include "xmalloc.h"
-#include "buffer.h"
-#include "bufaux.h"
-#include "key.h"
-#include "ssh.h"
-#include "log.h"
-#include "authfile.h"
-#include "rsa.h"
-
-/* Version identification string for SSH v1 identity files. */
-static const char authfile_id_string[] =
-    "SSH PRIVATE KEY FILE FORMAT 1.1\n";
-
-/*
- * Saves the authentication (private) key in a file, encrypting it with
- * passphrase.  The identification of the file (lowest 64 bits of n) will
- * precede the key to provide identification of the key without needing a
- * passphrase.
- */
-
-static int
-key_save_private_rsa1(Key *key, const char *filename, const char *passphrase,
-    const char *comment)
-{
-	Buffer buffer, encrypted;
-	u_char buf[100], *cp;
-	int fd, i, cipher_num;
-	CipherContext ciphercontext;
-	Cipher *cipher;
-	u_int32_t rand;
-
-	/*
-	 * If the passphrase is empty, use SSH_CIPHER_NONE to ease converting
-	 * to another cipher; otherwise use SSH_AUTHFILE_CIPHER.
-	 */
-	cipher_num = (strcmp(passphrase, "") == 0) ?
-	    SSH_CIPHER_NONE : SSH_AUTHFILE_CIPHER;
-	if ((cipher = cipher_by_number(cipher_num)) == NULL)
-		fatal("save_private_key_rsa: bad cipher");
-
-	/* This buffer is used to built the secret part of the private key. */
-	buffer_init(&buffer);
-
-	/* Put checkbytes for checking passphrase validity. */
-	rand = arc4random();
-	buf[0] = rand & 0xff;
-	buf[1] = (rand >> 8) & 0xff;
-	buf[2] = buf[0];
-	buf[3] = buf[1];
-	buffer_append(&buffer, buf, 4);
-
-	/*
-	 * Store the private key (n and e will not be stored because they
-	 * will be stored in plain text, and storing them also in encrypted
-	 * format would just give known plaintext).
-	 */
-	buffer_put_bignum(&buffer, key->rsa->d);
-	buffer_put_bignum(&buffer, key->rsa->iqmp);
-	buffer_put_bignum(&buffer, key->rsa->q);	/* reverse from SSL p */
-	buffer_put_bignum(&buffer, key->rsa->p);	/* reverse from SSL q */
-
-	/* Pad the part to be encrypted until its size is a multiple of 8. */
-	while (buffer_len(&buffer) % 8 != 0)
-		buffer_put_char(&buffer, 0);
-
-	/* This buffer will be used to contain the data in the file. */
-	buffer_init(&encrypted);
-
-	/* First store keyfile id string. */
-	for (i = 0; authfile_id_string[i]; i++)
-		buffer_put_char(&encrypted, authfile_id_string[i]);
-	buffer_put_char(&encrypted, 0);
-
-	/* Store cipher type. */
-	buffer_put_char(&encrypted, cipher_num);
-	buffer_put_int(&encrypted, 0);	/* For future extension */
-
-	/* Store public key.  This will be in plain text. */
-	buffer_put_int(&encrypted, BN_num_bits(key->rsa->n));
-	buffer_put_bignum(&encrypted, key->rsa->n);
-	buffer_put_bignum(&encrypted, key->rsa->e);
-	buffer_put_cstring(&encrypted, comment);
-
-	/* Allocate space for the private part of the key in the buffer. */
-	cp = buffer_append_space(&encrypted, buffer_len(&buffer));
-
-	cipher_set_key_string(&ciphercontext, cipher, passphrase,
-	    CIPHER_ENCRYPT);
-	cipher_crypt(&ciphercontext, cp,
-	    buffer_ptr(&buffer), buffer_len(&buffer));
-	cipher_cleanup(&ciphercontext);
-	memset(&ciphercontext, 0, sizeof(ciphercontext));
-
-	/* Destroy temporary data. */
-	memset(buf, 0, sizeof(buf));
-	buffer_free(&buffer);
-
-	fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600);
-	if (fd < 0) {
-		error("open %s failed: %s.", filename, strerror(errno));
-		return 0;
-	}
-	if (write(fd, buffer_ptr(&encrypted), buffer_len(&encrypted)) !=
-	    buffer_len(&encrypted)) {
-		error("write to key file %s failed: %s", filename,
-		    strerror(errno));
-		buffer_free(&encrypted);
-		close(fd);
-		unlink(filename);
-		return 0;
-	}
-	close(fd);
-	buffer_free(&encrypted);
-	return 1;
-}
-
-/* save SSH v2 key in OpenSSL PEM format */
-static int
-key_save_private_pem(Key *key, const char *filename, const char *_passphrase,
-    const char *comment)
-{
-	FILE *fp;
-	int fd;
-	int success = 0;
-	int len = strlen(_passphrase);
-	u_char *passphrase = (len > 0) ? (u_char *)_passphrase : NULL;
-	const EVP_CIPHER *cipher = (len > 0) ? EVP_des_ede3_cbc() : NULL;
-
-	if (len > 0 && len <= 4) {
-		error("passphrase too short: have %d bytes, need > 4", len);
-		return 0;
-	}
-	fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600);
-	if (fd < 0) {
-		error("open %s failed: %s.", filename, strerror(errno));
-		return 0;
-	}
-	fp = fdopen(fd, "w");
-	if (fp == NULL ) {
-		error("fdopen %s failed: %s.", filename, strerror(errno));
-		close(fd);
-		return 0;
-	}
-	switch (key->type) {
-	case KEY_DSA:
-		success = PEM_write_DSAPrivateKey(fp, key->dsa,
-		    cipher, passphrase, len, NULL, NULL);
-		break;
-	case KEY_RSA:
-		success = PEM_write_RSAPrivateKey(fp, key->rsa,
-		    cipher, passphrase, len, NULL, NULL);
-		break;
-	}
-	fclose(fp);
-	return success;
-}
-
-int
-key_save_private(Key *key, const char *filename, const char *passphrase,
-    const char *comment)
-{
-	switch (key->type) {
-	case KEY_RSA1:
-		return key_save_private_rsa1(key, filename, passphrase,
-		    comment);
-		break;
-	case KEY_DSA:
-	case KEY_RSA:
-		return key_save_private_pem(key, filename, passphrase,
-		    comment);
-		break;
-	default:
-		break;
-	}
-	error("key_save_private: cannot save key type %d", key->type);
-	return 0;
-}
-
-/*
- * Loads the public part of the ssh v1 key file.  Returns NULL if an error was
- * encountered (the file does not exist or is not readable), and the key
- * otherwise.
- */
-
-static Key *
-key_load_public_rsa1(int fd, const char *filename, char **commentp)
-{
-	Buffer buffer;
-	Key *pub;
-	char *cp;
-	int i;
-	off_t len;
-
-	len = lseek(fd, (off_t) 0, SEEK_END);
-	lseek(fd, (off_t) 0, SEEK_SET);
-
-	buffer_init(&buffer);
-	cp = buffer_append_space(&buffer, len);
-
-	if (read(fd, cp, (size_t) len) != (size_t) len) {
-		debug("Read from key file %.200s failed: %.100s", filename,
-		    strerror(errno));
-		buffer_free(&buffer);
-		return NULL;
-	}
-
-	/* Check that it is at least big enough to contain the ID string. */
-	if (len < sizeof(authfile_id_string)) {
-		debug3("Not a RSA1 key file %.200s.", filename);
-		buffer_free(&buffer);
-		return NULL;
-	}
-	/*
-	 * Make sure it begins with the id string.  Consume the id string
-	 * from the buffer.
-	 */
-	for (i = 0; i < sizeof(authfile_id_string); i++)
-		if (buffer_get_char(&buffer) != authfile_id_string[i]) {
-			debug3("Not a RSA1 key file %.200s.", filename);
-			buffer_free(&buffer);
-			return NULL;
-		}
-	/* Skip cipher type and reserved data. */
-	(void) buffer_get_char(&buffer);	/* cipher type */
-	(void) buffer_get_int(&buffer);		/* reserved */
-
-	/* Read the public key from the buffer. */
-	(void) buffer_get_int(&buffer);
-	pub = key_new(KEY_RSA1);
-	buffer_get_bignum(&buffer, pub->rsa->n);
-	buffer_get_bignum(&buffer, pub->rsa->e);
-	if (commentp)
-		*commentp = buffer_get_string(&buffer, NULL);
-	/* The encrypted private part is not parsed by this function. */
-
-	buffer_free(&buffer);
-	return pub;
-}
-
-/* load public key from private-key file, works only for SSH v1 */
-Key *
-key_load_public_type(int type, const char *filename, char **commentp)
-{
-	Key *pub;
-	int fd;
-
-	if (type == KEY_RSA1) {
-		fd = open(filename, O_RDONLY);
-		if (fd < 0)
-			return NULL;
-		pub = key_load_public_rsa1(fd, filename, commentp);
-		close(fd);
-		return pub;
-	}
-	return NULL;
-}
-
-/*
- * Loads the private key from the file.  Returns 0 if an error is encountered
- * (file does not exist or is not readable, or passphrase is bad). This
- * initializes the private key.
- * Assumes we are called under uid of the owner of the file.
- */
-
-static Key *
-key_load_private_rsa1(int fd, const char *filename, const char *passphrase,
-    char **commentp)
-{
-	int i, check1, check2, cipher_type;
-	off_t len;
-	Buffer buffer, decrypted;
-	u_char *cp;
-	CipherContext ciphercontext;
-	Cipher *cipher;
-	Key *prv = NULL;
-
-	len = lseek(fd, (off_t) 0, SEEK_END);
-	lseek(fd, (off_t) 0, SEEK_SET);
-
-	buffer_init(&buffer);
-	cp = buffer_append_space(&buffer, len);
-
-	if (read(fd, cp, (size_t) len) != (size_t) len) {
-		debug("Read from key file %.200s failed: %.100s", filename,
-		    strerror(errno));
-		buffer_free(&buffer);
-		close(fd);
-		return NULL;
-	}
-
-	/* Check that it is at least big enough to contain the ID string. */
-	if (len < sizeof(authfile_id_string)) {
-		debug3("Not a RSA1 key file %.200s.", filename);
-		buffer_free(&buffer);
-		close(fd);
-		return NULL;
-	}
-	/*
-	 * Make sure it begins with the id string.  Consume the id string
-	 * from the buffer.
-	 */
-	for (i = 0; i < sizeof(authfile_id_string); i++)
-		if (buffer_get_char(&buffer) != authfile_id_string[i]) {
-			debug3("Not a RSA1 key file %.200s.", filename);
-			buffer_free(&buffer);
-			close(fd);
-			return NULL;
-		}
-
-	/* Read cipher type. */
-	cipher_type = buffer_get_char(&buffer);
-	(void) buffer_get_int(&buffer);	/* Reserved data. */
-
-	/* Read the public key from the buffer. */
-	(void) buffer_get_int(&buffer);
-	prv = key_new_private(KEY_RSA1);
-
-	buffer_get_bignum(&buffer, prv->rsa->n);
-	buffer_get_bignum(&buffer, prv->rsa->e);
-	if (commentp)
-		*commentp = buffer_get_string(&buffer, NULL);
-	else
-		xfree(buffer_get_string(&buffer, NULL));
-
-	/* Check that it is a supported cipher. */
-	cipher = cipher_by_number(cipher_type);
-	if (cipher == NULL) {
-		debug("Unsupported cipher %d used in key file %.200s.",
-		    cipher_type, filename);
-		buffer_free(&buffer);
-		goto fail;
-	}
-	/* Initialize space for decrypted data. */
-	buffer_init(&decrypted);
-	cp = buffer_append_space(&decrypted, buffer_len(&buffer));
-
-	/* Rest of the buffer is encrypted.  Decrypt it using the passphrase. */
-	cipher_set_key_string(&ciphercontext, cipher, passphrase,
-	    CIPHER_DECRYPT);
-	cipher_crypt(&ciphercontext, cp,
-	    buffer_ptr(&buffer), buffer_len(&buffer));
-	cipher_cleanup(&ciphercontext);
-	memset(&ciphercontext, 0, sizeof(ciphercontext));
-	buffer_free(&buffer);
-
-	check1 = buffer_get_char(&decrypted);
-	check2 = buffer_get_char(&decrypted);
-	if (check1 != buffer_get_char(&decrypted) ||
-	    check2 != buffer_get_char(&decrypted)) {
-		if (strcmp(passphrase, "") != 0)
-			debug("Bad passphrase supplied for key file %.200s.",
-			    filename);
-		/* Bad passphrase. */
-		buffer_free(&decrypted);
-		goto fail;
-	}
-	/* Read the rest of the private key. */
-	buffer_get_bignum(&decrypted, prv->rsa->d);
-	buffer_get_bignum(&decrypted, prv->rsa->iqmp);		/* u */
-	/* in SSL and SSH v1 p and q are exchanged */
-	buffer_get_bignum(&decrypted, prv->rsa->q);		/* p */
-	buffer_get_bignum(&decrypted, prv->rsa->p);		/* q */
-
-	/* calculate p-1 and q-1 */
-	rsa_generate_additional_parameters(prv->rsa);
-
-	buffer_free(&decrypted);
-	close(fd);
-	return prv;
-
-fail:
-	if (commentp)
-		xfree(*commentp);
-	close(fd);
-	key_free(prv);
-	return NULL;
-}
-
-Key *
-key_load_private_pem(int fd, int type, const char *passphrase,
-    char **commentp)
-{
-	FILE *fp;
-	EVP_PKEY *pk = NULL;
-	Key *prv = NULL;
-	char *name = "<no key>";
-
-	fp = fdopen(fd, "r");
-	if (fp == NULL) {
-		error("fdopen failed: %s", strerror(errno));
-		close(fd);
-		return NULL;
-	}
-	pk = PEM_read_PrivateKey(fp, NULL, NULL, (char *)passphrase);
-	if (pk == NULL) {
-		debug("PEM_read_PrivateKey failed");
-		(void)ERR_get_error();
-	} else if (pk->type == EVP_PKEY_RSA &&
-	    (type == KEY_UNSPEC||type==KEY_RSA)) {
-		prv = key_new(KEY_UNSPEC);
-		prv->rsa = EVP_PKEY_get1_RSA(pk);
-		prv->type = KEY_RSA;
-		name = "rsa w/o comment";
-#ifdef DEBUG_PK
-		RSA_print_fp(stderr, prv->rsa, 8);
-#endif
-	} else if (pk->type == EVP_PKEY_DSA &&
-	    (type == KEY_UNSPEC||type==KEY_DSA)) {
-		prv = key_new(KEY_UNSPEC);
-		prv->dsa = EVP_PKEY_get1_DSA(pk);
-		prv->type = KEY_DSA;
-		name = "dsa w/o comment";
-#ifdef DEBUG_PK
-		DSA_print_fp(stderr, prv->dsa, 8);
-#endif
-	} else {
-		error("PEM_read_PrivateKey: mismatch or "
-		    "unknown EVP_PKEY save_type %d", pk->save_type);
-	}
-	fclose(fp);
-	if (pk != NULL)
-		EVP_PKEY_free(pk);
-	if (prv != NULL && commentp)
-		*commentp = xstrdup(name);
-	debug("read PEM private key done: type %s",
-	    prv ? key_type(prv) : "<unknown>");
-	return prv;
-}
-
-static int
-key_perm_ok(int fd, const char *filename)
-{
-	struct stat st;
-
-	if (fstat(fd, &st) < 0)
-		return 0;
-	/*
-	 * if a key owned by the user is accessed, then we check the
-	 * permissions of the file. if the key owned by a different user,
-	 * then we don't care.
-	 */
-#ifdef HAVE_CYGWIN
-	if (check_ntsec(filename))
-#endif
-	if ((st.st_uid == getuid()) && (st.st_mode & 077) != 0) {
-		error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
-		error("@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @");
-		error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
-		error("Permissions 0%3.3o for '%s' are too open.",
-		    (int)(st.st_mode & 0777), filename);
-		error("It is recommended that your private key files are NOT accessible by others.");
-		error("This private key will be ignored.");
-		return 0;
-	}
-	return 1;
-}
-
-Key *
-key_load_private_type(int type, const char *filename, const char *passphrase,
-    char **commentp)
-{
-	int fd;
-
-	fd = open(filename, O_RDONLY);
-	if (fd < 0)
-		return NULL;
-	if (!key_perm_ok(fd, filename)) {
-		error("bad permissions: ignore key: %s", filename);
-		close(fd);
-		return NULL;
-	}
-	switch (type) {
-	case KEY_RSA1:
-		return key_load_private_rsa1(fd, filename, passphrase,
-		    commentp);
-		/* closes fd */
-		break;
-	case KEY_DSA:
-	case KEY_RSA:
-	case KEY_UNSPEC:
-		return key_load_private_pem(fd, type, passphrase, commentp);
-		/* closes fd */
-		break;
-	default:
-		close(fd);
-		break;
-	}
-	return NULL;
-}
-
-Key *
-key_load_private(const char *filename, const char *passphrase,
-    char **commentp)
-{
-	Key *pub, *prv;
-	int fd;
-
-	fd = open(filename, O_RDONLY);
-	if (fd < 0)
-		return NULL;
-	if (!key_perm_ok(fd, filename)) {
-		error("bad permissions: ignore key: %s", filename);
-		close(fd);
-		return NULL;
-	}
-	pub = key_load_public_rsa1(fd, filename, commentp);
-	lseek(fd, (off_t) 0, SEEK_SET);		/* rewind */
-	if (pub == NULL) {
-		/* closes fd */
-		prv = key_load_private_pem(fd, KEY_UNSPEC, passphrase, NULL);
-		/* use the filename as a comment for PEM */
-		if (commentp && prv)
-			*commentp = xstrdup(filename);
-	} else {
-		/* it's a SSH v1 key if the public key part is readable */
-		key_free(pub);
-		/* closes fd */
-		prv = key_load_private_rsa1(fd, filename, passphrase, NULL);
-	}
-	return prv;
-}
-
-static int
-key_try_load_public(Key *k, const char *filename, char **commentp)
-{
-	FILE *f;
-	char line[4096];
-	char *cp;
-
-	f = fopen(filename, "r");
-	if (f != NULL) {
-		while (fgets(line, sizeof(line), f)) {
-			line[sizeof(line)-1] = '\0';
-			cp = line;
-			switch (*cp) {
-			case '#':
-			case '\n':
-			case '\0':
-				continue;
-			}
-			/* Skip leading whitespace. */
-			for (; *cp && (*cp == ' ' || *cp == '\t'); cp++)
-				;
-			if (*cp) {
-				if (key_read(k, &cp) == 1) {
-					if (commentp)
-						*commentp=xstrdup(filename);
-					fclose(f);
-					return 1;
-				}
-			}
-		}
-		fclose(f);
-	}
-	return 0;
-}
-
-/* load public key from ssh v1 private or any pubkey file */
-Key *
-key_load_public(const char *filename, char **commentp)
-{
-	Key *pub;
-	char file[MAXPATHLEN];
-
-	pub = key_load_public_type(KEY_RSA1, filename, commentp);
-	if (pub != NULL)
-		return pub;
-	pub = key_new(KEY_UNSPEC);
-	if (key_try_load_public(pub, filename, commentp) == 1)
-		return pub;
-	if ((strlcpy(file, filename, sizeof file) < sizeof(file)) &&
-	    (strlcat(file, ".pub", sizeof file) < sizeof(file)) &&
-	    (key_try_load_public(pub, file, commentp) == 1))
-		return pub;
-	key_free(pub);
-	return NULL;
-}