- OpenBSD CVS update:
- [channels.c]
close efd on eof
- [clientloop.c compat.c ssh.c sshconnect.c myproposal.h]
ssh2 client implementation, interops w/ ssh.com and lsh servers.
- [sshconnect.c]
missing free.
- [authfile.c cipher.c cipher.h packet.c sshconnect.c sshd.c]
remove unused argument, split cipher_mask()
- [clientloop.c]
re-order: group ssh1 vs. ssh2
- Make Redhat spec require openssl >= 0.9.5a
This commit is contained in:
Damien Miller
parent
74a333bbe1
commit
1383bd8eb9
14
ChangeLog
14
ChangeLog
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@ -1,3 +1,17 @@
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20000406
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- OpenBSD CVS update:
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- [channels.c]
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close efd on eof
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- [clientloop.c compat.c ssh.c sshconnect.c myproposal.h]
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ssh2 client implementation, interops w/ ssh.com and lsh servers.
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- [sshconnect.c]
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missing free.
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- [authfile.c cipher.c cipher.h packet.c sshconnect.c sshd.c]
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remove unused argument, split cipher_mask()
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- [clientloop.c]
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re-order: group ssh1 vs. ssh2
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- Make Redhat spec require openssl >= 0.9.5a
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20000404
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- Add tests for RAND_add function when searching for OpenSSL
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- OpenBSD CVS update:
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@ -15,7 +15,7 @@
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*/
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#include "includes.h"
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RCSID("$Id: authfile.c,v 1.7 2000/03/02 12:57:18 damien Exp $");
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RCSID("$Id: authfile.c,v 1.8 2000/04/06 02:32:38 damien Exp $");
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#ifdef HAVE_OPENSSL
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#include <openssl/bn.h>
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@ -107,7 +107,7 @@ save_private_key(const char *filename, const char *passphrase,
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/* Allocate space for the private part of the key in the buffer. */
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buffer_append_space(&encrypted, &cp, buffer_len(&buffer));
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cipher_set_key_string(&cipher, cipher_type, passphrase, 1);
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cipher_set_key_string(&cipher, cipher_type, passphrase);
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cipher_encrypt(&cipher, (unsigned char *) cp,
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(unsigned char *) buffer_ptr(&buffer),
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buffer_len(&buffer));
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@ -286,7 +286,7 @@ load_private_key(const char *filename, const char *passphrase,
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xfree(buffer_get_string(&buffer, NULL));
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/* Check that it is a supported cipher. */
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if (((cipher_mask() | SSH_CIPHER_NONE | SSH_AUTHFILE_CIPHER) &
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if (((cipher_mask1() | SSH_CIPHER_NONE | SSH_AUTHFILE_CIPHER) &
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(1 << cipher_type)) == 0) {
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debug("Unsupported cipher %.100s used in key file %.200s.",
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cipher_name(cipher_type), filename);
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@ -298,7 +298,7 @@ load_private_key(const char *filename, const char *passphrase,
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buffer_append_space(&decrypted, &cp, buffer_len(&buffer));
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/* Rest of the buffer is encrypted. Decrypt it using the passphrase. */
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cipher_set_key_string(&cipher, cipher_type, passphrase, 0);
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cipher_set_key_string(&cipher, cipher_type, passphrase);
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cipher_decrypt(&cipher, (unsigned char *) cp,
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(unsigned char *) buffer_ptr(&buffer),
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buffer_len(&buffer));
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10
channels.c
10
channels.c
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@ -17,7 +17,7 @@
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*/
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#include "includes.h"
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RCSID("$Id: channels.c,v 1.21 2000/04/04 04:39:00 damien Exp $");
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RCSID("$Id: channels.c,v 1.22 2000/04/06 02:32:38 damien Exp $");
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#include "ssh.h"
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#include "packet.h"
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@ -642,6 +642,7 @@ channel_handle_efd(Channel *c, fd_set * readset, fd_set * writeset)
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char buf[16*1024];
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int len;
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/** XXX handle drain efd, too */
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if (c->efd != -1) {
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if (c->extended_usage == CHAN_EXTENDED_WRITE &&
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FD_ISSET(c->efd, writeset) &&
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@ -659,7 +660,12 @@ channel_handle_efd(Channel *c, fd_set * readset, fd_set * writeset)
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len = read(c->efd, buf, sizeof(buf));
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debug("channel %d: read %d from efd %d",
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c->self, len, c->efd);
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if (len > 0)
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if (len == 0) {
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debug("channel %d: closing efd %d",
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c->self, c->efd);
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close(c->efd);
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c->efd = -1;
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} else if (len > 0)
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buffer_append(&c->extended, buf, len);
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}
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}
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24
cipher.c
24
cipher.c
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@ -12,7 +12,7 @@
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*/
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#include "includes.h"
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RCSID("$Id: cipher.c,v 1.15 2000/04/01 01:09:23 damien Exp $");
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RCSID("$Id: cipher.c,v 1.16 2000/04/06 02:32:39 damien Exp $");
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#include "ssh.h"
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#include "cipher.h"
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@ -137,17 +137,28 @@ static char *cipher_names[] =
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*/
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unsigned int
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cipher_mask()
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cipher_mask1()
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{
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unsigned int mask = 0;
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mask |= 1 << SSH_CIPHER_3DES; /* Mandatory */
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mask |= 1 << SSH_CIPHER_BLOWFISH;
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return mask;
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}
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unsigned int
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cipher_mask2()
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{
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unsigned int mask = 0;
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mask |= 1 << SSH_CIPHER_BLOWFISH_CBC;
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mask |= 1 << SSH_CIPHER_3DES_CBC;
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mask |= 1 << SSH_CIPHER_ARCFOUR;
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mask |= 1 << SSH_CIPHER_CAST128_CBC;
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return mask;
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}
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unsigned int
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cipher_mask()
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{
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return cipher_mask1() | cipher_mask2();
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}
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/* Returns the name of the cipher. */
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@ -182,8 +193,7 @@ cipher_number(const char *name)
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*/
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void
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cipher_set_key_string(CipherContext *context, int cipher,
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const char *passphrase, int for_encryption)
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cipher_set_key_string(CipherContext *context, int cipher, const char *passphrase)
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{
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MD5_CTX md;
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unsigned char digest[16];
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@ -192,7 +202,7 @@ cipher_set_key_string(CipherContext *context, int cipher,
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MD5_Update(&md, (const unsigned char *) passphrase, strlen(passphrase));
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MD5_Final(digest, &md);
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cipher_set_key(context, cipher, digest, 16, for_encryption);
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cipher_set_key(context, cipher, digest, 16);
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memset(digest, 0, sizeof(digest));
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memset(&md, 0, sizeof(md));
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@ -201,8 +211,8 @@ cipher_set_key_string(CipherContext *context, int cipher,
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/* Selects the cipher to use and sets the key. */
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void
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cipher_set_key(CipherContext *context, int cipher,
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const unsigned char *key, int keylen, int for_encryption)
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cipher_set_key(CipherContext *context, int cipher, const unsigned char *key,
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int keylen)
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{
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unsigned char padded[32];
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8
cipher.h
8
cipher.h
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@ -11,7 +11,7 @@
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*
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*/
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/* RCSID("$Id: cipher.h,v 1.7 2000/04/01 01:09:23 damien Exp $"); */
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/* RCSID("$Id: cipher.h,v 1.8 2000/04/06 02:32:39 damien Exp $"); */
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#ifndef CIPHER_H
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#define CIPHER_H
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* supported cipher.
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*/
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unsigned int cipher_mask();
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unsigned int cipher_mask1();
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unsigned int cipher_mask2();
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/* Returns the name of the cipher. */
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const char *cipher_name(int cipher);
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@ -92,7 +94,7 @@ int cipher_number(const char *name);
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*/
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void
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cipher_set_key(CipherContext * context, int cipher,
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const unsigned char *key, int keylen, int for_encryption);
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const unsigned char *key, int keylen);
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void
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cipher_set_key_iv(CipherContext * context, int cipher,
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const unsigned char *key, int keylen,
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@ -104,7 +106,7 @@ cipher_set_key_iv(CipherContext * context, int cipher,
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*/
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void
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cipher_set_key_string(CipherContext * context, int cipher,
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const char *passphrase, int for_encryption);
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const char *passphrase);
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/* Encrypts data using the cipher. */
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void
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208
clientloop.c
208
clientloop.c
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@ -12,10 +12,11 @@
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*
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* The main loop for the interactive session (client side).
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*
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* SSH2 support added by Markus Friedl.
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*/
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#include "includes.h"
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RCSID("$Id: clientloop.c,v 1.8 2000/04/01 01:09:23 damien Exp $");
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RCSID("$Id: clientloop.c,v 1.9 2000/04/06 02:32:39 damien Exp $");
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#include "xmalloc.h"
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#include "ssh.h"
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@ -24,6 +25,7 @@ RCSID("$Id: clientloop.c,v 1.8 2000/04/01 01:09:23 damien Exp $");
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#include "authfd.h"
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#include "readconf.h"
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#include "ssh2.h"
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#include "compat.h"
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#include "channels.h"
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#include "dispatch.h"
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@ -75,6 +77,10 @@ static unsigned long stdin_bytes, stdout_bytes, stderr_bytes;
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static int quit_pending; /* Set to non-zero to quit the client loop. */
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static int escape_char; /* Escape character. */
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void client_init_dispatch(void);
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int session_ident = -1;
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/* Returns the user\'s terminal to normal mode if it had been put in raw mode. */
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void
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@ -273,23 +279,32 @@ client_make_packets_from_stdin_data()
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void
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client_check_window_change()
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{
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/* Send possible window change message to the server. */
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if (received_window_change_signal) {
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struct winsize ws;
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struct winsize ws;
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/* Clear the window change indicator. */
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received_window_change_signal = 0;
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if (! received_window_change_signal)
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return;
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/** XXX race */
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received_window_change_signal = 0;
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/* Read new window size. */
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if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) >= 0) {
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/* Successful, send the packet now. */
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packet_start(SSH_CMSG_WINDOW_SIZE);
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packet_put_int(ws.ws_row);
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packet_put_int(ws.ws_col);
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packet_put_int(ws.ws_xpixel);
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packet_put_int(ws.ws_ypixel);
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packet_send();
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}
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if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
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return;
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debug("client_check_window_change: changed");
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if (compat20) {
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channel_request_start(session_ident, "window-change", 0);
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packet_put_int(ws.ws_col);
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packet_put_int(ws.ws_row);
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packet_put_int(ws.ws_xpixel);
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packet_put_int(ws.ws_ypixel);
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packet_send();
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} else {
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packet_start(SSH_CMSG_WINDOW_SIZE);
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packet_put_int(ws.ws_row);
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packet_put_int(ws.ws_col);
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packet_put_int(ws.ws_xpixel);
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packet_put_int(ws.ws_ypixel);
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packet_send();
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}
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}
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@ -301,24 +316,34 @@ client_check_window_change()
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void
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client_wait_until_can_do_something(fd_set * readset, fd_set * writeset)
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{
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/*debug("client_wait_until_can_do_something"); */
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/* Initialize select masks. */
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FD_ZERO(readset);
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/* Read from the connection, unless our buffers are full. */
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if (buffer_len(&stdout_buffer) < buffer_high &&
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buffer_len(&stderr_buffer) < buffer_high &&
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channel_not_very_much_buffered_data())
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FD_SET(connection_in, readset);
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/*
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* Read from stdin, unless we have seen EOF or have very much
|
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* buffered data to send to the server.
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*/
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if (!stdin_eof && packet_not_very_much_data_to_write())
|
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FD_SET(fileno(stdin), readset);
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FD_ZERO(writeset);
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|
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if (!compat20) {
|
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/* Read from the connection, unless our buffers are full. */
|
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if (buffer_len(&stdout_buffer) < buffer_high &&
|
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buffer_len(&stderr_buffer) < buffer_high &&
|
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channel_not_very_much_buffered_data())
|
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FD_SET(connection_in, readset);
|
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/*
|
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* Read from stdin, unless we have seen EOF or have very much
|
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* buffered data to send to the server.
|
||||
*/
|
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if (!stdin_eof && packet_not_very_much_data_to_write())
|
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FD_SET(fileno(stdin), readset);
|
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|
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/* Select stdout/stderr if have data in buffer. */
|
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if (buffer_len(&stdout_buffer) > 0)
|
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FD_SET(fileno(stdout), writeset);
|
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if (buffer_len(&stderr_buffer) > 0)
|
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FD_SET(fileno(stderr), writeset);
|
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} else {
|
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FD_SET(connection_in, readset);
|
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}
|
||||
|
||||
/* Add any selections by the channel mechanism. */
|
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channel_prepare_select(readset, writeset);
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|
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|
|
@ -326,14 +351,7 @@ client_wait_until_can_do_something(fd_set * readset, fd_set * writeset)
|
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if (packet_have_data_to_write())
|
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FD_SET(connection_out, writeset);
|
||||
|
||||
/* Select stdout if have data in buffer. */
|
||||
if (buffer_len(&stdout_buffer) > 0)
|
||||
FD_SET(fileno(stdout), writeset);
|
||||
|
||||
/* Select stderr if have data in buffer. */
|
||||
if (buffer_len(&stderr_buffer) > 0)
|
||||
FD_SET(fileno(stderr), writeset);
|
||||
|
||||
/* move UP XXX */
|
||||
/* Update maximum file descriptor number, if appropriate. */
|
||||
if (channel_max_fd() > max_fd)
|
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max_fd = channel_max_fd();
|
||||
|
|
@ -408,10 +426,10 @@ client_suspend_self()
|
|||
}
|
||||
|
||||
void
|
||||
client_process_input(fd_set * readset)
|
||||
client_process_net_input(fd_set * readset)
|
||||
{
|
||||
int len, pid;
|
||||
char buf[8192], *s;
|
||||
int len;
|
||||
char buf[8192];
|
||||
|
||||
/*
|
||||
* Read input from the server, and add any such data to the buffer of
|
||||
|
|
@ -420,6 +438,7 @@ client_process_input(fd_set * readset)
|
|||
if (FD_ISSET(connection_in, readset)) {
|
||||
/* Read as much as possible. */
|
||||
len = read(connection_in, buf, sizeof(buf));
|
||||
/*debug("read connection_in len %d", len); XXX */
|
||||
if (len == 0) {
|
||||
/* Received EOF. The remote host has closed the connection. */
|
||||
snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
|
||||
|
|
@ -447,6 +466,14 @@ client_process_input(fd_set * readset)
|
|||
}
|
||||
packet_process_incoming(buf, len);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
client_process_input(fd_set * readset)
|
||||
{
|
||||
int len, pid;
|
||||
char buf[8192], *s;
|
||||
|
||||
/* Read input from stdin. */
|
||||
if (FD_ISSET(fileno(stdin), readset)) {
|
||||
/* Read as much as possible. */
|
||||
|
|
@ -703,8 +730,6 @@ client_process_buffered_input_packets()
|
|||
* character for terminating or suspending the session.
|
||||
*/
|
||||
|
||||
void client_init_dispatch(void);
|
||||
|
||||
int
|
||||
client_loop(int have_pty, int escape_char_arg)
|
||||
{
|
||||
|
|
@ -753,7 +778,8 @@ client_loop(int have_pty, int escape_char_arg)
|
|||
enter_raw_mode();
|
||||
|
||||
/* Check if we should immediately send of on stdin. */
|
||||
client_check_initial_eof_on_stdin();
|
||||
if (!compat20)
|
||||
client_check_initial_eof_on_stdin();
|
||||
|
||||
/* Main loop of the client for the interactive session mode. */
|
||||
while (!quit_pending) {
|
||||
|
|
@ -762,11 +788,17 @@ client_loop(int have_pty, int escape_char_arg)
|
|||
/* Process buffered packets sent by the server. */
|
||||
client_process_buffered_input_packets();
|
||||
|
||||
if (compat20 && !channel_still_open()) {
|
||||
debug("!channel_still_open.");
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Make packets of buffered stdin data, and buffer them for
|
||||
* sending to the server.
|
||||
*/
|
||||
client_make_packets_from_stdin_data();
|
||||
if (!compat20)
|
||||
client_make_packets_from_stdin_data();
|
||||
|
||||
/*
|
||||
* Make packets from buffered channel data, and buffer them
|
||||
|
|
@ -796,17 +828,21 @@ client_loop(int have_pty, int escape_char_arg)
|
|||
/* Do channel operations. */
|
||||
channel_after_select(&readset, &writeset);
|
||||
|
||||
/*
|
||||
* Process input from the connection and from stdin. Buffer
|
||||
* any data that is available.
|
||||
*/
|
||||
client_process_input(&readset);
|
||||
/* Buffer input from the connection. */
|
||||
client_process_net_input(&readset);
|
||||
|
||||
/*
|
||||
* Process output to stdout and stderr. Output to the
|
||||
* connection is processed elsewhere (above).
|
||||
*/
|
||||
client_process_output(&writeset);
|
||||
if (quit_pending)
|
||||
break;
|
||||
|
||||
if (!compat20) {
|
||||
/* Buffer data from stdin */
|
||||
client_process_input(&readset);
|
||||
/*
|
||||
* Process output to stdout and stderr. Output to
|
||||
* the connection is processed elsewhere (above).
|
||||
*/
|
||||
client_process_output(&writeset);
|
||||
}
|
||||
|
||||
/* Send as much buffered packet data as possible to the sender. */
|
||||
if (FD_ISSET(connection_out, &writeset))
|
||||
|
|
@ -917,6 +953,19 @@ client_input_exit_status(int type, int plen)
|
|||
quit_pending = 1;
|
||||
}
|
||||
|
||||
void
|
||||
client_init_dispatch_20()
|
||||
{
|
||||
dispatch_init(&dispatch_protocol_error);
|
||||
dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
|
||||
dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
|
||||
dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
|
||||
dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
|
||||
dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
|
||||
dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
|
||||
dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &channel_input_channel_request);
|
||||
dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
|
||||
}
|
||||
void
|
||||
client_init_dispatch_13()
|
||||
{
|
||||
|
|
@ -944,8 +993,55 @@ client_init_dispatch_15()
|
|||
void
|
||||
client_init_dispatch()
|
||||
{
|
||||
if (compat13)
|
||||
if (compat20)
|
||||
client_init_dispatch_20();
|
||||
else if (compat13)
|
||||
client_init_dispatch_13();
|
||||
else
|
||||
client_init_dispatch_15();
|
||||
}
|
||||
|
||||
void
|
||||
client_input_channel_req(int id, void *arg)
|
||||
{
|
||||
Channel *c = NULL;
|
||||
unsigned int len;
|
||||
int success = 0;
|
||||
int reply;
|
||||
char *rtype;
|
||||
|
||||
rtype = packet_get_string(&len);
|
||||
reply = packet_get_char();
|
||||
|
||||
log("session_input_channel_req: rtype %s reply %d", rtype, reply);
|
||||
|
||||
c = channel_lookup(id);
|
||||
if (c == NULL)
|
||||
fatal("session_input_channel_req: channel %d: bad channel", id);
|
||||
|
||||
if (session_ident == -1) {
|
||||
error("client_input_channel_req: no channel %d", id);
|
||||
} else if (id != session_ident) {
|
||||
error("client_input_channel_req: bad channel %d != %d",
|
||||
id, session_ident);
|
||||
} else if (strcmp(rtype, "exit-status") == 0) {
|
||||
success = 1;
|
||||
exit_status = packet_get_int();
|
||||
}
|
||||
if (reply) {
|
||||
packet_start(success ?
|
||||
SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
|
||||
packet_put_int(c->remote_id);
|
||||
packet_send();
|
||||
}
|
||||
xfree(rtype);
|
||||
}
|
||||
|
||||
void
|
||||
client_set_session_ident(int id)
|
||||
{
|
||||
debug("client_set_session_ident: id %d", id);
|
||||
session_ident = id;
|
||||
channel_register_callback(id, SSH2_MSG_CHANNEL_REQUEST,
|
||||
client_input_channel_req, (void *)0);
|
||||
}
|
||||
|
|
|
|||
6
compat.c
6
compat.c
|
|
@ -28,7 +28,7 @@
|
|||
*/
|
||||
|
||||
#include "includes.h"
|
||||
RCSID("$Id: compat.c,v 1.4 2000/04/04 04:39:01 damien Exp $");
|
||||
RCSID("$Id: compat.c,v 1.5 2000/04/06 02:32:39 damien Exp $");
|
||||
|
||||
#include "ssh.h"
|
||||
#include "packet.h"
|
||||
|
|
@ -40,7 +40,9 @@ int datafellows = 0;
|
|||
void
|
||||
enable_compat20(void)
|
||||
{
|
||||
fatal("protocol 2.0 not implemented");
|
||||
verbose("Enabling compatibility mode for protocol 2.0");
|
||||
compat20 = 1;
|
||||
packet_set_ssh2_format();
|
||||
}
|
||||
void
|
||||
enable_compat13(void)
|
||||
|
|
|
|||
|
|
@ -15,8 +15,8 @@ Copyright: BSD
|
|||
Group: Applications/Internet
|
||||
BuildRoot: /tmp/openssh-%{version}-buildroot
|
||||
Obsoletes: ssh
|
||||
PreReq: openssl
|
||||
Requires: openssl
|
||||
PreReq: openssl >= 0.9.5a
|
||||
Requires: openssl >= 0.9.5a
|
||||
BuildPreReq: perl
|
||||
BuildPreReq: openssl-devel
|
||||
BuildPreReq: tcp_wrappers
|
||||
|
|
|
|||
11
kex.h
11
kex.h
|
|
@ -29,6 +29,17 @@
|
|||
#ifndef KEX_H
|
||||
#define KEX_H
|
||||
|
||||
#include "config.h"
|
||||
|
||||
#ifdef HAVE_OPENSSL
|
||||
# include <openssl/bn.h>
|
||||
# include <openssl/evp.h>
|
||||
#endif
|
||||
#ifdef HAVE_SSL
|
||||
# include <ssl/bn.h>
|
||||
# include <ssl/evp.h>
|
||||
#endif
|
||||
|
||||
#define KEX_DH1 "diffie-hellman-group1-sha1"
|
||||
#define KEX_DSS "ssh-dss"
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,20 @@
|
|||
#define KEX_DEFAULT_KEX "diffie-hellman-group1-sha1"
|
||||
#define KEX_DEFAULT_PK_ALG "ssh-dss"
|
||||
#define KEX_DEFAULT_ENCRYPT "blowfish-cbc,3des-cbc,arcfour,cast128-cbc"
|
||||
#define KEX_DEFAULT_MAC "hmac-sha1,hmac-md5,hmac-ripemd160@openssh.com"
|
||||
#define KEX_DEFAULT_COMP "zlib,none"
|
||||
#define KEX_DEFAULT_LANG ""
|
||||
|
||||
|
||||
static const char *myproposal[PROPOSAL_MAX] = {
|
||||
KEX_DEFAULT_KEX,
|
||||
KEX_DEFAULT_PK_ALG,
|
||||
KEX_DEFAULT_ENCRYPT,
|
||||
KEX_DEFAULT_ENCRYPT,
|
||||
KEX_DEFAULT_MAC,
|
||||
KEX_DEFAULT_MAC,
|
||||
KEX_DEFAULT_COMP,
|
||||
KEX_DEFAULT_COMP,
|
||||
KEX_DEFAULT_LANG,
|
||||
KEX_DEFAULT_LANG
|
||||
};
|
||||
32
packet.c
32
packet.c
|
|
@ -17,7 +17,18 @@
|
|||
*/
|
||||
|
||||
#include "includes.h"
|
||||
RCSID("$Id: packet.c,v 1.15 2000/04/04 04:57:08 damien Exp $");
|
||||
RCSID("$Id: packet.c,v 1.16 2000/04/06 02:32:40 damien Exp $");
|
||||
|
||||
#ifdef HAVE_OPENSSL
|
||||
# include <openssl/bn.h>
|
||||
# include <openssl/dh.h>
|
||||
# include <openssl/hmac.h>
|
||||
#endif /* HAVE_OPENSSL */
|
||||
#ifdef HAVE_SSL
|
||||
# include <ssl/bn.h>
|
||||
# include <ssl/dh.h>
|
||||
# include <ssl/hmac.h>
|
||||
#endif /* HAVE_SSL */
|
||||
|
||||
#include "xmalloc.h"
|
||||
#include "buffer.h"
|
||||
|
|
@ -35,17 +46,6 @@ RCSID("$Id: packet.c,v 1.15 2000/04/04 04:57:08 damien Exp $");
|
|||
#include "compat.h"
|
||||
#include "ssh2.h"
|
||||
|
||||
#ifdef HAVE_OPENSSL
|
||||
# include <openssl/bn.h>
|
||||
# include <openssl/dh.h>
|
||||
# include <openssl/hmac.h>
|
||||
#endif /* HAVE_OPENSSL */
|
||||
#ifdef HAVE_SSL
|
||||
# include <ssl/bn.h>
|
||||
# include <ssl/dh.h>
|
||||
# include <ssl/hmac.h>
|
||||
#endif /* HAVE_SSL */
|
||||
|
||||
#include "buffer.h"
|
||||
#include "kex.h"
|
||||
#include "hmac.h"
|
||||
|
|
@ -152,8 +152,8 @@ packet_set_connection(int fd_in, int fd_out)
|
|||
connection_in = fd_in;
|
||||
connection_out = fd_out;
|
||||
cipher_type = SSH_CIPHER_NONE;
|
||||
cipher_set_key(&send_context, SSH_CIPHER_NONE, (unsigned char *) "", 0, 1);
|
||||
cipher_set_key(&receive_context, SSH_CIPHER_NONE, (unsigned char *) "", 0, 0);
|
||||
cipher_set_key(&send_context, SSH_CIPHER_NONE, (unsigned char *) "", 0);
|
||||
cipher_set_key(&receive_context, SSH_CIPHER_NONE, (unsigned char *) "", 0);
|
||||
if (!initialized) {
|
||||
initialized = 1;
|
||||
buffer_init(&input);
|
||||
|
|
@ -352,8 +352,8 @@ packet_set_encryption_key(const unsigned char *key, unsigned int keylen,
|
|||
fatal("keylen too small: %d", keylen);
|
||||
|
||||
/* All other ciphers use the same key in both directions for now. */
|
||||
cipher_set_key(&receive_context, cipher, key, keylen, 0);
|
||||
cipher_set_key(&send_context, cipher, key, keylen, 1);
|
||||
cipher_set_key(&receive_context, cipher, key, keylen);
|
||||
cipher_set_key(&send_context, cipher, key, keylen);
|
||||
}
|
||||
|
||||
/* Starts constructing a packet to send. */
|
||||
|
|
|
|||
4
packet.h
4
packet.h
|
|
@ -13,13 +13,11 @@
|
|||
*
|
||||
*/
|
||||
|
||||
/* RCSID("$Id: packet.h,v 1.11 2000/04/04 04:39:03 damien Exp $"); */
|
||||
/* RCSID("$Id: packet.h,v 1.12 2000/04/06 02:32:40 damien Exp $"); */
|
||||
|
||||
#ifndef PACKET_H
|
||||
#define PACKET_H
|
||||
|
||||
#include "config.h"
|
||||
|
||||
#ifdef HAVE_OPENSSL
|
||||
#include <openssl/bn.h>
|
||||
#endif
|
||||
|
|
|
|||
166
ssh.c
166
ssh.c
|
|
@ -11,7 +11,7 @@
|
|||
*/
|
||||
|
||||
#include "includes.h"
|
||||
RCSID("$Id: ssh.c,v 1.23 2000/04/01 01:09:26 damien Exp $");
|
||||
RCSID("$Id: ssh.c,v 1.24 2000/04/06 02:32:40 damien Exp $");
|
||||
|
||||
#include "xmalloc.h"
|
||||
#include "ssh.h"
|
||||
|
|
@ -20,6 +20,9 @@ RCSID("$Id: ssh.c,v 1.23 2000/04/01 01:09:26 damien Exp $");
|
|||
#include "authfd.h"
|
||||
#include "readconf.h"
|
||||
#include "uidswap.h"
|
||||
|
||||
#include "ssh2.h"
|
||||
#include "compat.h"
|
||||
#include "channels.h"
|
||||
|
||||
#ifdef HAVE___PROGNAME
|
||||
|
|
@ -41,6 +44,10 @@ int debug_flag = 0;
|
|||
|
||||
int tty_flag = 0;
|
||||
|
||||
/* don't exec a shell */
|
||||
int no_shell_flag = 0;
|
||||
int no_tty_flag = 0;
|
||||
|
||||
/*
|
||||
* Flag indicating that nothing should be read from stdin. This can be set
|
||||
* on the command line.
|
||||
|
|
@ -90,6 +97,9 @@ RSA *host_private_key = NULL;
|
|||
/* Original real UID. */
|
||||
uid_t original_real_uid;
|
||||
|
||||
/* command to be executed */
|
||||
Buffer command;
|
||||
|
||||
/* Prints a help message to the user. This function never returns. */
|
||||
|
||||
void
|
||||
|
|
@ -104,9 +114,9 @@ usage()
|
|||
fprintf(stderr, " -k Disable Kerberos ticket and AFS token forwarding.\n");
|
||||
#endif /* AFS */
|
||||
fprintf(stderr, " -x Disable X11 connection forwarding.\n");
|
||||
fprintf(stderr, " -X Enable X11 connection forwarding.\n");
|
||||
fprintf(stderr, " -i file Identity for RSA authentication (default: ~/.ssh/identity).\n");
|
||||
fprintf(stderr, " -t Tty; allocate a tty even if command is given.\n");
|
||||
fprintf(stderr, " -T Do not allocate a tty.\n");
|
||||
fprintf(stderr, " -v Verbose; display verbose debugging messages.\n");
|
||||
fprintf(stderr, " -V Display version number only.\n");
|
||||
fprintf(stderr, " -P Don't allocate a privileged port.\n");
|
||||
|
|
@ -123,6 +133,7 @@ usage()
|
|||
fprintf(stderr, " These cause %s to listen for connections on a port, and\n", av0);
|
||||
fprintf(stderr, " forward them to the other side by connecting to host:port.\n");
|
||||
fprintf(stderr, " -C Enable compression.\n");
|
||||
fprintf(stderr, " -N Do not execute a shell or command.\n");
|
||||
fprintf(stderr, " -g Allow remote hosts to connect to forwarded ports.\n");
|
||||
fprintf(stderr, " -4 Use IPv4 only.\n");
|
||||
fprintf(stderr, " -6 Use IPv6 only.\n");
|
||||
|
|
@ -168,23 +179,22 @@ rsh_connect(char *host, char *user, Buffer * command)
|
|||
exit(1);
|
||||
}
|
||||
|
||||
int ssh_session(void);
|
||||
int ssh_session2(void);
|
||||
|
||||
/*
|
||||
* Main program for the ssh client.
|
||||
*/
|
||||
int
|
||||
main(int ac, char **av)
|
||||
{
|
||||
int i, opt, optind, type, exit_status, ok, authfd;
|
||||
int i, opt, optind, exit_status, ok;
|
||||
u_short fwd_port, fwd_host_port;
|
||||
char *optarg, *cp, buf[256];
|
||||
Buffer command;
|
||||
struct winsize ws;
|
||||
struct stat st;
|
||||
struct passwd *pw, pwcopy;
|
||||
int interactive = 0, dummy;
|
||||
int have_pty = 0;
|
||||
int dummy;
|
||||
uid_t original_effective_uid;
|
||||
int plen;
|
||||
|
||||
/*
|
||||
* Save the original real uid. It will be needed later (uid-swapping
|
||||
|
|
@ -328,7 +338,7 @@ main(int ac, char **av)
|
|||
case 'V':
|
||||
fprintf(stderr, "SSH Version %s, protocol version %d.%d.\n",
|
||||
SSH_VERSION, PROTOCOL_MAJOR, PROTOCOL_MINOR);
|
||||
fprintf(stderr, "Compiled with SSL.\n");
|
||||
fprintf(stderr, "Compiled with SSL (0x%8.8lx).\n", SSLeay());
|
||||
if (opt == 'V')
|
||||
exit(0);
|
||||
debug_flag = 1;
|
||||
|
|
@ -397,6 +407,15 @@ main(int ac, char **av)
|
|||
options.compression = 1;
|
||||
break;
|
||||
|
||||
case 'N':
|
||||
no_shell_flag = 1;
|
||||
no_tty_flag = 1;
|
||||
break;
|
||||
|
||||
case 'T':
|
||||
no_tty_flag = 1;
|
||||
break;
|
||||
|
||||
case 'o':
|
||||
dummy = 1;
|
||||
if (process_config_line(&options, host ? host : "", optarg,
|
||||
|
|
@ -455,6 +474,10 @@ main(int ac, char **av)
|
|||
fprintf(stderr, "Pseudo-terminal will not be allocated because stdin is not a terminal.\n");
|
||||
tty_flag = 0;
|
||||
}
|
||||
/* force */
|
||||
if (no_tty_flag)
|
||||
tty_flag = 0;
|
||||
|
||||
/* Get user data. */
|
||||
pw = getpwuid(original_real_uid);
|
||||
if (!pw) {
|
||||
|
|
@ -620,6 +643,23 @@ main(int ac, char **av)
|
|||
if (host_private_key_loaded)
|
||||
RSA_free(host_private_key); /* Destroys contents safely */
|
||||
|
||||
exit_status = compat20 ? ssh_session2() : ssh_session();
|
||||
packet_close();
|
||||
return exit_status;
|
||||
}
|
||||
|
||||
int
|
||||
ssh_session(void)
|
||||
{
|
||||
int type;
|
||||
int i;
|
||||
int plen;
|
||||
int interactive = 0;
|
||||
int have_tty = 0;
|
||||
struct winsize ws;
|
||||
int authfd;
|
||||
char *cp;
|
||||
|
||||
/* Enable compression if requested. */
|
||||
if (options.compression) {
|
||||
debug("Requesting compression at level %d.", options.compression_level);
|
||||
|
|
@ -673,7 +713,7 @@ main(int ac, char **av)
|
|||
type = packet_read(&plen);
|
||||
if (type == SSH_SMSG_SUCCESS) {
|
||||
interactive = 1;
|
||||
have_pty = 1;
|
||||
have_tty = 1;
|
||||
} else if (type == SSH_SMSG_FAILURE)
|
||||
log("Warning: Remote host failed or refused to allocate a pseudo tty.");
|
||||
else
|
||||
|
|
@ -802,11 +842,103 @@ main(int ac, char **av)
|
|||
}
|
||||
|
||||
/* Enter the interactive session. */
|
||||
exit_status = client_loop(have_pty, tty_flag ? options.escape_char : -1);
|
||||
|
||||
/* Close the connection to the remote host. */
|
||||
packet_close();
|
||||
|
||||
/* Exit with the status returned by the program on the remote side. */
|
||||
exit(exit_status);
|
||||
return client_loop(have_tty, tty_flag ? options.escape_char : -1);
|
||||
}
|
||||
|
||||
void
|
||||
init_local_fwd(void)
|
||||
{
|
||||
int i;
|
||||
/* Initiate local TCP/IP port forwardings. */
|
||||
for (i = 0; i < options.num_local_forwards; i++) {
|
||||
debug("Connections to local port %d forwarded to remote address %.200s:%d",
|
||||
options.local_forwards[i].port,
|
||||
options.local_forwards[i].host,
|
||||
options.local_forwards[i].host_port);
|
||||
channel_request_local_forwarding(options.local_forwards[i].port,
|
||||
options.local_forwards[i].host,
|
||||
options.local_forwards[i].host_port,
|
||||
options.gateway_ports);
|
||||
}
|
||||
}
|
||||
|
||||
extern void client_set_session_ident(int id);
|
||||
|
||||
void
|
||||
client_init(int id, void *arg)
|
||||
{
|
||||
int len;
|
||||
debug("client_init id %d arg %d", id, (int)arg);
|
||||
|
||||
if (no_shell_flag)
|
||||
goto done;
|
||||
|
||||
if (tty_flag) {
|
||||
struct winsize ws;
|
||||
char *cp;
|
||||
cp = getenv("TERM");
|
||||
if (!cp)
|
||||
cp = "";
|
||||
/* Store window size in the packet. */
|
||||
if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
|
||||
memset(&ws, 0, sizeof(ws));
|
||||
|
||||
channel_request_start(id, "pty-req", 0);
|
||||
packet_put_cstring(cp);
|
||||
packet_put_int(ws.ws_col);
|
||||
packet_put_int(ws.ws_row);
|
||||
packet_put_int(ws.ws_xpixel);
|
||||
packet_put_int(ws.ws_ypixel);
|
||||
packet_put_cstring(""); /* XXX: encode terminal modes */
|
||||
packet_send();
|
||||
/* XXX wait for reply */
|
||||
}
|
||||
len = buffer_len(&command);
|
||||
if (len > 0) {
|
||||
if (len > 900)
|
||||
len = 900;
|
||||
debug("Sending command: %.*s", len, buffer_ptr(&command));
|
||||
channel_request_start(id, "exec", 0);
|
||||
packet_put_string(buffer_ptr(&command), len);
|
||||
packet_send();
|
||||
} else {
|
||||
channel_request(id, "shell", 0);
|
||||
}
|
||||
/* channel_callback(id, SSH2_MSG_OPEN_CONFIGMATION, client_init, 0); */
|
||||
done:
|
||||
/* register different callback, etc. XXX */
|
||||
client_set_session_ident(id);
|
||||
}
|
||||
|
||||
int
|
||||
ssh_session2(void)
|
||||
{
|
||||
int window, packetmax, id;
|
||||
int in = dup(STDIN_FILENO);
|
||||
int out = dup(STDOUT_FILENO);
|
||||
int err = dup(STDERR_FILENO);
|
||||
|
||||
if (in < 0 || out < 0 || err < 0)
|
||||
fatal("dump in/out/err failed");
|
||||
|
||||
/* should be pre-session */
|
||||
init_local_fwd();
|
||||
|
||||
window = 32*1024;
|
||||
if (tty_flag) {
|
||||
packetmax = window/8;
|
||||
} else {
|
||||
window *= 2;
|
||||
packetmax = window/2;
|
||||
}
|
||||
|
||||
id = channel_new(
|
||||
"session", SSH_CHANNEL_OPENING, in, out, err,
|
||||
window, packetmax, CHAN_EXTENDED_WRITE, xstrdup("client-session"));
|
||||
|
||||
|
||||
channel_open(id);
|
||||
channel_register_callback(id, SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, client_init, (void *)0);
|
||||
|
||||
return client_loop(tty_flag, tty_flag ? options.escape_char : -1);
|
||||
}
|
||||
|
|
|
|||
350
sshconnect.c
350
sshconnect.c
|
|
@ -5,27 +5,30 @@
|
|||
* Created: Sat Mar 18 22:15:47 1995 ylo
|
||||
* Code to connect to a remote host, and to perform the client side of the
|
||||
* login (authentication) dialog.
|
||||
*
|
||||
* SSH2 support added by Markus Friedl.
|
||||
*/
|
||||
|
||||
#include "includes.h"
|
||||
RCSID("$OpenBSD: sshconnect.c,v 1.58 2000/03/23 22:15:33 markus Exp $");
|
||||
RCSID("$OpenBSD: sshconnect.c,v 1.61 2000/04/04 21:37:27 markus Exp $");
|
||||
|
||||
#ifdef HAVE_OPENSSL
|
||||
#include <openssl/bn.h>
|
||||
#include <openssl/rsa.h>
|
||||
#include <openssl/dsa.h>
|
||||
#include <openssl/md5.h>
|
||||
#include <openssl/bn.h>
|
||||
#endif
|
||||
#ifdef HAVE_SSL
|
||||
#include <ssl/bn.h>
|
||||
#include <ssl/rsa.h>
|
||||
#include <ssl/dsa.h>
|
||||
#include <ssl/md5.h>
|
||||
#include <ssl/bn.h>
|
||||
#endif
|
||||
|
||||
#include "xmalloc.h"
|
||||
#include "rsa.h"
|
||||
#include "ssh.h"
|
||||
#include "buffer.h"
|
||||
#include "packet.h"
|
||||
#include "authfd.h"
|
||||
#include "cipher.h"
|
||||
|
|
@ -33,7 +36,14 @@ RCSID("$OpenBSD: sshconnect.c,v 1.58 2000/03/23 22:15:33 markus Exp $");
|
|||
#include "uidswap.h"
|
||||
#include "compat.h"
|
||||
#include "readconf.h"
|
||||
|
||||
#include "bufaux.h"
|
||||
|
||||
#include "ssh2.h"
|
||||
#include "kex.h"
|
||||
#include "myproposal.h"
|
||||
#include "key.h"
|
||||
#include "dsa.h"
|
||||
#include "hostfile.h"
|
||||
|
||||
/* Session id for the current session. */
|
||||
|
|
@ -42,6 +52,9 @@ unsigned char session_id[16];
|
|||
/* authentications supported by server */
|
||||
unsigned int supported_authentications;
|
||||
|
||||
static char *client_version_string = NULL;
|
||||
static char *server_version_string = NULL;
|
||||
|
||||
extern Options options;
|
||||
extern char *__progname;
|
||||
|
||||
|
|
@ -957,6 +970,21 @@ try_password_authentication(char *prompt)
|
|||
return 0;
|
||||
}
|
||||
|
||||
char *
|
||||
chop(char *s)
|
||||
{
|
||||
char *t = s;
|
||||
while (*t) {
|
||||
if(*t == '\n' || *t == '\r') {
|
||||
*t = '\0';
|
||||
return s;
|
||||
}
|
||||
t++;
|
||||
}
|
||||
return s;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
* Waits for the server identification string, and sends our own
|
||||
* identification string.
|
||||
|
|
@ -979,7 +1007,7 @@ ssh_exchange_identification()
|
|||
if (buf[i] == '\r') {
|
||||
buf[i] = '\n';
|
||||
buf[i + 1] = 0;
|
||||
break;
|
||||
continue; /**XXX wait for \n */
|
||||
}
|
||||
if (buf[i] == '\n') {
|
||||
buf[i + 1] = 0;
|
||||
|
|
@ -987,17 +1015,21 @@ ssh_exchange_identification()
|
|||
}
|
||||
}
|
||||
buf[sizeof(buf) - 1] = 0;
|
||||
server_version_string = xstrdup(buf);
|
||||
|
||||
/*
|
||||
* Check that the versions match. In future this might accept
|
||||
* several versions and set appropriate flags to handle them.
|
||||
*/
|
||||
if (sscanf(buf, "SSH-%d.%d-%[^\n]\n", &remote_major, &remote_minor,
|
||||
remote_version) != 3)
|
||||
if (sscanf(server_version_string, "SSH-%d.%d-%[^\n]\n",
|
||||
&remote_major, &remote_minor, remote_version) != 3)
|
||||
fatal("Bad remote protocol version identification: '%.100s'", buf);
|
||||
debug("Remote protocol version %d.%d, remote software version %.100s",
|
||||
remote_major, remote_minor, remote_version);
|
||||
|
||||
/*** XXX option for disabling 2.0 or 1.5 */
|
||||
compat_datafellows(remote_version);
|
||||
|
||||
/* Check if the remote protocol version is too old. */
|
||||
if (remote_major == 1 && remote_minor < 3)
|
||||
fatal("Remote machine has too old SSH software version.");
|
||||
|
|
@ -1010,6 +1042,10 @@ ssh_exchange_identification()
|
|||
options.forward_agent = 0;
|
||||
}
|
||||
}
|
||||
if ((remote_major == 2 && remote_minor == 0) ||
|
||||
(remote_major == 1 && remote_minor == 99)) {
|
||||
enable_compat20();
|
||||
}
|
||||
#if 0
|
||||
/*
|
||||
* Removed for now, to permit compatibility with latter versions. The
|
||||
|
|
@ -1020,16 +1056,19 @@ ssh_exchange_identification()
|
|||
fatal("Protocol major versions differ: %d vs. %d",
|
||||
PROTOCOL_MAJOR, remote_major);
|
||||
#endif
|
||||
|
||||
/* Send our own protocol version identification. */
|
||||
snprintf(buf, sizeof buf, "SSH-%d.%d-%.100s\n",
|
||||
PROTOCOL_MAJOR, PROTOCOL_MINOR, SSH_VERSION);
|
||||
compat20 ? 2 : PROTOCOL_MAJOR,
|
||||
compat20 ? 0 : PROTOCOL_MINOR,
|
||||
SSH_VERSION);
|
||||
if (atomicio(write, connection_out, buf, strlen(buf)) != strlen(buf))
|
||||
fatal("write: %.100s", strerror(errno));
|
||||
client_version_string = xstrdup(buf);
|
||||
chop(client_version_string);
|
||||
chop(server_version_string);
|
||||
debug("Local version string %.100s", client_version_string);
|
||||
}
|
||||
|
||||
int ssh_cipher_default = SSH_CIPHER_3DES;
|
||||
|
||||
int
|
||||
read_yes_or_no(const char *prompt, int defval)
|
||||
{
|
||||
|
|
@ -1282,6 +1321,278 @@ check_rsa_host_key(char *host, struct sockaddr *hostaddr, RSA *host_key)
|
|||
check_host_key(host, hostaddr, &k);
|
||||
}
|
||||
|
||||
/*
|
||||
* SSH2 key exchange
|
||||
*/
|
||||
void
|
||||
ssh_kex2(char *host, struct sockaddr *hostaddr)
|
||||
{
|
||||
Kex *kex;
|
||||
char *cprop[PROPOSAL_MAX];
|
||||
char *sprop[PROPOSAL_MAX];
|
||||
Buffer *client_kexinit;
|
||||
Buffer *server_kexinit;
|
||||
int payload_len, dlen;
|
||||
unsigned int klen, kout;
|
||||
char *ptr;
|
||||
char *signature = NULL;
|
||||
unsigned int slen;
|
||||
char *server_host_key_blob = NULL;
|
||||
Key *server_host_key;
|
||||
unsigned int sbloblen;
|
||||
DH *dh;
|
||||
BIGNUM *dh_server_pub = 0;
|
||||
BIGNUM *shared_secret = 0;
|
||||
int i;
|
||||
unsigned char *kbuf;
|
||||
unsigned char *hash;
|
||||
|
||||
/* KEXINIT */
|
||||
|
||||
debug("Sending KEX init.");
|
||||
if (options.cipher == SSH_CIPHER_ARCFOUR ||
|
||||
options.cipher == SSH_CIPHER_3DES_CBC ||
|
||||
options.cipher == SSH_CIPHER_CAST128_CBC ||
|
||||
options.cipher == SSH_CIPHER_BLOWFISH_CBC) {
|
||||
myproposal[PROPOSAL_ENC_ALGS_CTOS] = cipher_name(options.cipher);
|
||||
myproposal[PROPOSAL_ENC_ALGS_STOC] = cipher_name(options.cipher);
|
||||
}
|
||||
if (options.compression) {
|
||||
myproposal[PROPOSAL_COMP_ALGS_CTOS] = "zlib";
|
||||
myproposal[PROPOSAL_COMP_ALGS_STOC] = "zlib";
|
||||
} else {
|
||||
myproposal[PROPOSAL_COMP_ALGS_CTOS] = "none";
|
||||
myproposal[PROPOSAL_COMP_ALGS_STOC] = "none";
|
||||
}
|
||||
for (i = 0; i < PROPOSAL_MAX; i++)
|
||||
cprop[i] = xstrdup(myproposal[i]);
|
||||
|
||||
client_kexinit = kex_init(cprop);
|
||||
packet_start(SSH2_MSG_KEXINIT);
|
||||
packet_put_raw(buffer_ptr(client_kexinit), buffer_len(client_kexinit));
|
||||
packet_send();
|
||||
packet_write_wait();
|
||||
|
||||
debug("done");
|
||||
|
||||
packet_read_expect(&payload_len, SSH2_MSG_KEXINIT);
|
||||
|
||||
/* save payload for session_id */
|
||||
server_kexinit = xmalloc(sizeof(*server_kexinit));
|
||||
buffer_init(server_kexinit);
|
||||
ptr = packet_get_raw(&payload_len);
|
||||
buffer_append(server_kexinit, ptr, payload_len);
|
||||
|
||||
/* skip cookie */
|
||||
for (i = 0; i < 16; i++)
|
||||
(void) packet_get_char();
|
||||
/* kex init proposal strings */
|
||||
for (i = 0; i < PROPOSAL_MAX; i++) {
|
||||
sprop[i] = packet_get_string(NULL);
|
||||
debug("got kexinit string: %s", sprop[i]);
|
||||
}
|
||||
i = (int) packet_get_char();
|
||||
debug("first kex follow == %d", i);
|
||||
i = packet_get_int();
|
||||
debug("reserved == %d", i);
|
||||
|
||||
debug("done read kexinit");
|
||||
kex = kex_choose_conf(cprop, sprop, 0);
|
||||
|
||||
/* KEXDH */
|
||||
|
||||
debug("Sending SSH2_MSG_KEXDH_INIT.");
|
||||
|
||||
/* generate and send 'e', client DH public key */
|
||||
dh = new_dh_group1();
|
||||
packet_start(SSH2_MSG_KEXDH_INIT);
|
||||
packet_put_bignum2(dh->pub_key);
|
||||
packet_send();
|
||||
packet_write_wait();
|
||||
|
||||
#ifdef DEBUG_KEXDH
|
||||
fprintf(stderr, "\np= ");
|
||||
bignum_print(dh->p);
|
||||
fprintf(stderr, "\ng= ");
|
||||
bignum_print(dh->g);
|
||||
fprintf(stderr, "\npub= ");
|
||||
bignum_print(dh->pub_key);
|
||||
fprintf(stderr, "\n");
|
||||
DHparams_print_fp(stderr, dh);
|
||||
#endif
|
||||
|
||||
debug("Wait SSH2_MSG_KEXDH_REPLY.");
|
||||
|
||||
packet_read_expect(&payload_len, SSH2_MSG_KEXDH_REPLY);
|
||||
|
||||
debug("Got SSH2_MSG_KEXDH_REPLY.");
|
||||
|
||||
/* key, cert */
|
||||
server_host_key_blob = packet_get_string(&sbloblen);
|
||||
server_host_key = dsa_serverkey_from_blob(server_host_key_blob, sbloblen);
|
||||
if (server_host_key == NULL)
|
||||
fatal("cannot decode server_host_key_blob");
|
||||
|
||||
check_host_key(host, hostaddr, server_host_key);
|
||||
|
||||
/* DH paramter f, server public DH key */
|
||||
dh_server_pub = BN_new();
|
||||
if (dh_server_pub == NULL)
|
||||
fatal("dh_server_pub == NULL");
|
||||
packet_get_bignum2(dh_server_pub, &dlen);
|
||||
|
||||
#ifdef DEBUG_KEXDH
|
||||
fprintf(stderr, "\ndh_server_pub= ");
|
||||
bignum_print(dh_server_pub);
|
||||
fprintf(stderr, "\n");
|
||||
debug("bits %d", BN_num_bits(dh_server_pub));
|
||||
#endif
|
||||
|
||||
/* signed H */
|
||||
signature = packet_get_string(&slen);
|
||||
|
||||
klen = DH_size(dh);
|
||||
kbuf = xmalloc(klen);
|
||||
kout = DH_compute_key(kbuf, dh_server_pub, dh);
|
||||
#ifdef DEBUG_KEXDH
|
||||
debug("shared secret: len %d/%d", klen, kout);
|
||||
fprintf(stderr, "shared secret == ");
|
||||
for (i = 0; i< kout; i++)
|
||||
fprintf(stderr, "%02x", (kbuf[i])&0xff);
|
||||
fprintf(stderr, "\n");
|
||||
#endif
|
||||
shared_secret = BN_new();
|
||||
|
||||
BN_bin2bn(kbuf, kout, shared_secret);
|
||||
memset(kbuf, 0, klen);
|
||||
xfree(kbuf);
|
||||
|
||||
/* calc and verify H */
|
||||
hash = kex_hash(
|
||||
client_version_string,
|
||||
server_version_string,
|
||||
buffer_ptr(client_kexinit), buffer_len(client_kexinit),
|
||||
buffer_ptr(server_kexinit), buffer_len(server_kexinit),
|
||||
server_host_key_blob, sbloblen,
|
||||
dh->pub_key,
|
||||
dh_server_pub,
|
||||
shared_secret
|
||||
);
|
||||
buffer_free(client_kexinit);
|
||||
buffer_free(server_kexinit);
|
||||
xfree(client_kexinit);
|
||||
xfree(server_kexinit);
|
||||
#ifdef DEBUG_KEXDH
|
||||
fprintf(stderr, "hash == ");
|
||||
for (i = 0; i< 20; i++)
|
||||
fprintf(stderr, "%02x", (hash[i])&0xff);
|
||||
fprintf(stderr, "\n");
|
||||
#endif
|
||||
dsa_verify(server_host_key, (unsigned char *)signature, slen, hash, 20);
|
||||
key_free(server_host_key);
|
||||
|
||||
kex_derive_keys(kex, hash, shared_secret);
|
||||
packet_set_kex(kex);
|
||||
|
||||
/* have keys, free DH */
|
||||
DH_free(dh);
|
||||
|
||||
debug("Wait SSH2_MSG_NEWKEYS.");
|
||||
packet_read_expect(&payload_len, SSH2_MSG_NEWKEYS);
|
||||
debug("GOT SSH2_MSG_NEWKEYS.");
|
||||
|
||||
debug("send SSH2_MSG_NEWKEYS.");
|
||||
packet_start(SSH2_MSG_NEWKEYS);
|
||||
packet_send();
|
||||
packet_write_wait();
|
||||
debug("done: send SSH2_MSG_NEWKEYS.");
|
||||
|
||||
/* send 1st encrypted/maced/compressed message */
|
||||
packet_start(SSH2_MSG_IGNORE);
|
||||
packet_put_cstring("markus");
|
||||
packet_send();
|
||||
packet_write_wait();
|
||||
|
||||
debug("done: KEX2.");
|
||||
}
|
||||
/*
|
||||
* Authenticate user
|
||||
*/
|
||||
void
|
||||
ssh_userauth2(int host_key_valid, RSA *own_host_key,
|
||||
uid_t original_real_uid, char *host)
|
||||
{
|
||||
int type;
|
||||
int plen;
|
||||
unsigned int dlen;
|
||||
int partial;
|
||||
struct passwd *pw;
|
||||
char *server_user, *local_user;
|
||||
char *auths;
|
||||
char *password;
|
||||
char *service = "ssh-connection"; // service name
|
||||
|
||||
debug("send SSH2_MSG_SERVICE_REQUEST");
|
||||
packet_start(SSH2_MSG_SERVICE_REQUEST);
|
||||
packet_put_cstring("ssh-userauth");
|
||||
packet_send();
|
||||
packet_write_wait();
|
||||
|
||||
type = packet_read(&plen);
|
||||
if (type != SSH2_MSG_SERVICE_ACCEPT) {
|
||||
fatal("denied SSH2_MSG_SERVICE_ACCEPT: %d", type);
|
||||
}
|
||||
/* payload empty for ssh-2.0.13 ?? */
|
||||
/* reply = packet_get_string(&payload_len); */
|
||||
debug("got SSH2_MSG_SERVICE_ACCEPT");
|
||||
|
||||
/*XX COMMONCODE: */
|
||||
/* Get local user name. Use it as server user if no user name was given. */
|
||||
pw = getpwuid(original_real_uid);
|
||||
if (!pw)
|
||||
fatal("User id %d not found from user database.", original_real_uid);
|
||||
local_user = xstrdup(pw->pw_name);
|
||||
server_user = options.user ? options.user : local_user;
|
||||
|
||||
/* INITIAL request for auth */
|
||||
packet_start(SSH2_MSG_USERAUTH_REQUEST);
|
||||
packet_put_cstring(server_user);
|
||||
packet_put_cstring(service);
|
||||
packet_put_cstring("none");
|
||||
packet_send();
|
||||
packet_write_wait();
|
||||
|
||||
for (;;) {
|
||||
type = packet_read(&plen);
|
||||
if (type == SSH2_MSG_USERAUTH_SUCCESS)
|
||||
break;
|
||||
if (type != SSH2_MSG_USERAUTH_FAILURE)
|
||||
fatal("access denied: %d", type);
|
||||
/* SSH2_MSG_USERAUTH_FAILURE means: try again */
|
||||
auths = packet_get_string(&dlen);
|
||||
debug("authentications that can continue: %s", auths);
|
||||
partial = packet_get_char();
|
||||
if (partial)
|
||||
debug("partial success");
|
||||
if (strstr(auths, "password") == NULL)
|
||||
fatal("passwd auth not supported: %s", auths);
|
||||
xfree(auths);
|
||||
/* try passwd */
|
||||
password = read_passphrase("password: ", 0);
|
||||
packet_start(SSH2_MSG_USERAUTH_REQUEST);
|
||||
packet_put_cstring(server_user);
|
||||
packet_put_cstring(service);
|
||||
packet_put_cstring("password");
|
||||
packet_put_char(0);
|
||||
packet_put_cstring(password);
|
||||
memset(password, 0, strlen(password));
|
||||
xfree(password);
|
||||
packet_send();
|
||||
packet_write_wait();
|
||||
}
|
||||
debug("ssh-userauth2 successfull");
|
||||
}
|
||||
|
||||
/*
|
||||
* SSH1 key exchange
|
||||
*/
|
||||
|
|
@ -1293,6 +1604,7 @@ ssh_kex(char *host, struct sockaddr *hostaddr)
|
|||
RSA *host_key;
|
||||
RSA *public_key;
|
||||
int bits, rbits;
|
||||
int ssh_cipher_default = SSH_CIPHER_3DES;
|
||||
unsigned char session_key[SSH_SESSION_KEY_LENGTH];
|
||||
unsigned char cookie[8];
|
||||
unsigned int supported_ciphers;
|
||||
|
|
@ -1427,7 +1739,7 @@ ssh_kex(char *host, struct sockaddr *hostaddr)
|
|||
RSA_free(host_key);
|
||||
|
||||
if (options.cipher == SSH_CIPHER_NOT_SET) {
|
||||
if (cipher_mask() & supported_ciphers & (1 << ssh_cipher_default))
|
||||
if (cipher_mask1() & supported_ciphers & (1 << ssh_cipher_default))
|
||||
options.cipher = ssh_cipher_default;
|
||||
else {
|
||||
debug("Cipher %s not supported, using %.100s instead.",
|
||||
|
|
@ -1640,12 +1952,16 @@ ssh_login(int host_key_valid, RSA *own_host_key, const char *orighost,
|
|||
/* Put the connection into non-blocking mode. */
|
||||
packet_set_nonblocking();
|
||||
|
||||
supported_authentications = 0;
|
||||
/* key exchange */
|
||||
ssh_kex(host, hostaddr);
|
||||
if (supported_authentications == 0)
|
||||
fatal("supported_authentications == 0.");
|
||||
|
||||
/* authenticate user */
|
||||
ssh_userauth(host_key_valid, own_host_key, original_real_uid, host);
|
||||
if (compat20) {
|
||||
ssh_kex2(host, hostaddr);
|
||||
ssh_userauth2(host_key_valid, own_host_key, original_real_uid, host);
|
||||
} else {
|
||||
supported_authentications = 0;
|
||||
ssh_kex(host, hostaddr);
|
||||
if (supported_authentications == 0)
|
||||
fatal("supported_authentications == 0.");
|
||||
ssh_userauth(host_key_valid, own_host_key, original_real_uid, host);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
4
sshd.c
4
sshd.c
|
|
@ -11,7 +11,7 @@
|
|||
*/
|
||||
|
||||
#include "includes.h"
|
||||
RCSID("$OpenBSD: sshd.c,v 1.96 2000/03/28 21:15:45 markus Exp $");
|
||||
RCSID("$OpenBSD: sshd.c,v 1.97 2000/04/04 21:37:27 markus Exp $");
|
||||
|
||||
#include "xmalloc.h"
|
||||
#include "rsa.h"
|
||||
|
|
@ -911,7 +911,7 @@ do_ssh1_kex()
|
|||
packet_put_int(SSH_PROTOFLAG_HOST_IN_FWD_OPEN);
|
||||
|
||||
/* Declare which ciphers we support. */
|
||||
packet_put_int(cipher_mask());
|
||||
packet_put_int(cipher_mask1());
|
||||
|
||||
/* Declare supported authentication types. */
|
||||
auth_mask = 0;
|
||||
|
|
|
|||
Loading…
Reference in New Issue