misc: Rename libssh/ to src/

1 files changed, 362 insertions, 0 deletions

diff --git a/src/packet1.c b/src/packet1.c
new file mode 100644
index 0000000..d4b2eae
--- /dev/null
+++ b/src/packet1.c
@@ -0,0 +1,362 @@
+/*
+ * This file is part of the SSH Library
+ *
+ * Copyright (c) 2010 by Aris Adamantiadis
+ *
+ * The SSH Library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ *
+ * The SSH Library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the SSH Library; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
+#include "config.h"
+#include "libssh/priv.h"
+#include "libssh/ssh1.h"
+#include "libssh/packet.h"
+#include "libssh/session.h"
+#include "libssh/buffer.h"
+#include "libssh/socket.h"
+#include "libssh/kex.h"
+#ifdef WITH_SSH1
+
+ssh_packet_callback default_packet_handlers1[]= {
+  NULL,                           //SSH_MSG_NONE                        0
+  ssh_packet_disconnect1,         //SSH_MSG_DISCONNECT                  1
+  ssh_packet_publickey1,          //SSH_SMSG_PUBLIC_KEY                 2
+  NULL,                           //SSH_CMSG_SESSION_KEY                3
+  NULL,                           //SSH_CMSG_USER                       4
+  NULL,                           //SSH_CMSG_AUTH_RHOSTS                5
+  NULL,                           //SSH_CMSG_AUTH_RSA                   6
+  NULL,                           //SSH_SMSG_AUTH_RSA_CHALLENGE         7
+  NULL,                           //SSH_CMSG_AUTH_RSA_RESPONSE          8
+  NULL,                           //SSH_CMSG_AUTH_PASSWORD              9
+  NULL,                           //SSH_CMSG_REQUEST_PTY                10
+  NULL,                           //SSH_CMSG_WINDOW_SIZE                11
+  NULL,                           //SSH_CMSG_EXEC_SHELL                 12
+  NULL,                           //SSH_CMSG_EXEC_CMD                   13
+  ssh_packet_smsg_success1,       //SSH_SMSG_SUCCESS                    14
+  ssh_packet_smsg_failure1,       //SSH_SMSG_FAILURE                    15
+  NULL,                           //SSH_CMSG_STDIN_DATA                 16
+  ssh_packet_data1,               //SSH_SMSG_STDOUT_DATA                17
+  ssh_packet_data1,               //SSH_SMSG_STDERR_DATA                18
+  NULL,                           //SSH_CMSG_EOF                        19
+  NULL,                           //SSH_SMSG_EXITSTATUS                 20
+  NULL,                           //SSH_MSG_CHANNEL_OPEN_CONFIRMATION   21
+  NULL,                           //SSH_MSG_CHANNEL_OPEN_FAILURE        22
+  NULL,                           //SSH_MSG_CHANNEL_DATA                23
+  ssh_packet_close1,              //SSH_MSG_CHANNEL_CLOSE               24
+  NULL,                           //SSH_MSG_CHANNEL_CLOSE_CONFIRMATION  25
+  NULL,                           //SSH_CMSG_X11_REQUEST_FORWARDING     26
+  NULL,                           //SSH_SMSG_X11_OPEN                   27
+  NULL,                           //SSH_CMSG_PORT_FORWARD_REQUEST       28
+  NULL,                           //SSH_MSG_PORT_OPEN                   29
+  NULL,                           //SSH_CMSG_AGENT_REQUEST_FORWARDING   30
+  NULL,                           //SSH_SMSG_AGENT_OPEN                 31
+  ssh_packet_ignore_callback,     //SSH_MSG_IGNORE                      32
+  NULL,                           //SSH_CMSG_EXIT_CONFIRMATION          33
+  NULL,                           //SSH_CMSG_X11_REQUEST_FORWARDING     34
+  NULL,                           //SSH_CMSG_AUTH_RHOSTS_RSA            35
+  ssh_packet_ignore_callback,     //SSH_MSG_DEBUG                       36
+};
+
+/** @internal
+ * @brief sets the default packet handlers
+ */
+void ssh_packet_set_default_callbacks1(ssh_session session){
+  session->default_packet_callbacks.start=0;
+  session->default_packet_callbacks.n_callbacks=sizeof(default_packet_handlers1)/sizeof(ssh_packet_callback);
+  session->default_packet_callbacks.user=session;
+  session->default_packet_callbacks.callbacks=default_packet_handlers1;
+  ssh_packet_set_callbacks(session, &session->default_packet_callbacks);
+}
+
+
+/** @internal
+ * @handles a data received event. It then calls the handlers for the different packet types
+ * or and exception handler callback. Adapted for SSH-1 packets.
+ * @param user pointer to current ssh_session
+ * @param data pointer to the data received
+ * @len length of data received. It might not be enough for a complete packet
+ * @returns number of bytes read and processed.
+ */
+
+int ssh_packet_socket_callback1(const void *data, size_t receivedlen, void *user) {
+  void *packet = NULL;
+  int rc = SSH_ERROR;
+  int to_be_read;
+  size_t processed=0;
+  uint32_t padding;
+  uint32_t crc;
+  uint32_t len;
+  ssh_session session=(ssh_session)user;
+  enter_function();
+
+  switch (session->packet_state){
+    case PACKET_STATE_INIT:
+      memset(&session->in_packet, 0, sizeof(PACKET));
+
+      if (session->in_buffer) {
+        if (buffer_reinit(session->in_buffer) < 0) {
+          goto error;
+        }
+      } else {
+        session->in_buffer = ssh_buffer_new();
+        if (session->in_buffer == NULL) {
+          goto error;
+        }
+      }
+      /* must have at least enough bytes for size */
+      if(receivedlen < sizeof(uint32_t)){
+        leave_function();
+        return 0;
+      }
+      memcpy(&len,data,sizeof(uint32_t));
+      processed += sizeof(uint32_t);
+      rc = SSH_ERROR;
+
+      /* len is not encrypted */
+      len = ntohl(len);
+      if (len > MAX_PACKET_LEN) {
+        ssh_set_error(session, SSH_FATAL,
+            "read_packet(): Packet len too high (%u %.8x)", len, len);
+        goto error;
+      }
+
+      ssh_log(session, SSH_LOG_PACKET, "Reading a %d bytes packet", len);
+
+      session->in_packet.len = len;
+      session->packet_state = PACKET_STATE_SIZEREAD;
+    case PACKET_STATE_SIZEREAD:
+      len = session->in_packet.len;
+      /* SSH-1 has a fixed padding lenght */
+      padding = 8 - (len % 8);
+      to_be_read = len + padding;
+      if(to_be_read + processed > receivedlen){
+        /* wait for rest of packet */
+        leave_function();
+        return processed;
+      }
+      /* it is _not_ possible that to_be_read be < 8. */
+      packet = (char *)data + processed;
+      rc = SSH_ERROR;
+
+      if (buffer_add_data(session->in_buffer,packet,to_be_read) < 0) {
+        SAFE_FREE(packet);
+        goto error;
+      }
+      processed += to_be_read;
+#ifdef DEBUG_CRYPTO
+      ssh_print_hexa("read packet:", ssh_buffer_get_begin(session->in_buffer),
+          ssh_buffer_get_len(session->in_buffer));
+#endif
+      if (session->current_crypto) {
+        /*
+         * We decrypt everything, missing the lenght part (which was
+         * previously read, unencrypted, and is not part of the buffer
+         */
+        if (packet_decrypt(session,
+              ssh_buffer_get_begin(session->in_buffer),
+              ssh_buffer_get_len(session->in_buffer)) < 0) {
+          ssh_set_error(session, SSH_FATAL, "Packet decrypt error");
+          goto error;
+        }
+      }
+#ifdef DEBUG_CRYPTO
+      ssh_print_hexa("read packet decrypted:", ssh_buffer_get_begin(session->in_buffer),
+          ssh_buffer_get_len(session->in_buffer));
+#endif
+      ssh_log(session, SSH_LOG_PACKET, "%d bytes padding", padding);
+      if(((len + padding) != buffer_get_rest_len(session->in_buffer)) ||
+          ((len + padding) < sizeof(uint32_t))) {
+        ssh_log(session, SSH_LOG_RARE, "no crc32 in packet");
+        ssh_set_error(session, SSH_FATAL, "no crc32 in packet");
+        goto error;
+      }
+
+      memcpy(&crc,
+          (unsigned char *)buffer_get_rest(session->in_buffer) + (len+padding) - sizeof(uint32_t),
+          sizeof(uint32_t));
+      buffer_pass_bytes_end(session->in_buffer, sizeof(uint32_t));
+      crc = ntohl(crc);
+      if (ssh_crc32(buffer_get_rest(session->in_buffer),
+            (len + padding) - sizeof(uint32_t)) != crc) {
+#ifdef DEBUG_CRYPTO
+        ssh_print_hexa("crc32 on",buffer_get_rest(session->in_buffer),
+            len + padding - sizeof(uint32_t));
+#endif
+        ssh_log(session, SSH_LOG_RARE, "Invalid crc32");
+        ssh_set_error(session, SSH_FATAL,
+            "Invalid crc32: expected %.8x, got %.8x",
+            crc,
+            ssh_crc32(buffer_get_rest(session->in_buffer),
+              len + padding - sizeof(uint32_t)));
+        goto error;
+      }
+      /* pass the padding */
+      buffer_pass_bytes(session->in_buffer, padding);
+      ssh_log(session, SSH_LOG_PACKET, "The packet is valid");
+
+/* TODO FIXME
+#if defined(HAVE_LIBZ) && defined(WITH_LIBZ)
+    if(session->current_crypto && session->current_crypto->do_compress_in){
+        decompress_buffer(session,session->in_buffer);
+    }
+#endif
+*/
+      session->recv_seq++;
+      /* We don't want to rewrite a new packet while still executing the packet callbacks */
+      session->packet_state = PACKET_STATE_PROCESSING;
+      ssh_packet_parse_type(session);
+      /* execute callbacks */
+      ssh_packet_process(session, session->in_packet.type);
+      session->packet_state = PACKET_STATE_INIT;
+      if(processed < receivedlen){
+        /* Handle a potential packet left in socket buffer */
+        ssh_log(session,SSH_LOG_PACKET,"Processing %" PRIdS " bytes left in socket buffer",
+            receivedlen-processed);
+        rc = ssh_packet_socket_callback1((char *)data + processed,
+            receivedlen - processed,user);
+        processed += rc;
+      }
+      leave_function();
+      return processed;
+    case PACKET_STATE_PROCESSING:
+      ssh_log(session, SSH_LOG_RARE, "Nested packet processing. Delaying.");
+      return 0;
+  }
+
+error:
+  session->session_state=SSH_SESSION_STATE_ERROR;
+  leave_function();
+  return processed;
+}
+
+
+int packet_send1(ssh_session session) {
+  unsigned int blocksize = (session->current_crypto ?
+      session->current_crypto->out_cipher->blocksize : 8);
+  uint32_t currentlen = ssh_buffer_get_len(session->out_buffer) + sizeof(uint32_t);
+  char padstring[32] = {0};
+  int rc = SSH_ERROR;
+  uint32_t finallen;
+  uint32_t crc;
+  uint8_t padding;
+
+  enter_function();
+  ssh_log(session,SSH_LOG_PACKET,"Sending a %d bytes long packet",currentlen);
+
+/* TODO FIXME
+#if defined(HAVE_LIBZ) && defined(WITH_LIBZ)
+  if (session->current_crypto && session->current_crypto->do_compress_out) {
+    if (compress_buffer(session, session->out_buffer) < 0) {
+      goto error;
+    }
+    currentlen = buffer_get_len(session->out_buffer);
+  }
+#endif
+*/
+  padding = blocksize - (currentlen % blocksize);
+  if (session->current_crypto) {
+    ssh_get_random(padstring, padding, 0);
+  } else {
+    memset(padstring, 0, padding);
+  }
+
+  finallen = htonl(currentlen);
+  ssh_log(session, SSH_LOG_PACKET,
+      "%d bytes after comp + %d padding bytes = %d bytes packet",
+      currentlen, padding, ntohl(finallen));
+
+  if (buffer_prepend_data(session->out_buffer, &padstring, padding) < 0) {
+    goto error;
+  }
+  if (buffer_prepend_data(session->out_buffer, &finallen, sizeof(uint32_t)) < 0) {
+    goto error;
+  }
+
+  crc = ssh_crc32((char *)ssh_buffer_get_begin(session->out_buffer) + sizeof(uint32_t),
+      ssh_buffer_get_len(session->out_buffer) - sizeof(uint32_t));
+
+  if (buffer_add_u32(session->out_buffer, ntohl(crc)) < 0) {
+    goto error;
+  }
+
+#ifdef DEBUG_CRYPTO
+  ssh_print_hexa("Clear packet", ssh_buffer_get_begin(session->out_buffer),
+      ssh_buffer_get_len(session->out_buffer));
+#endif
+
+  packet_encrypt(session, (unsigned char *)ssh_buffer_get_begin(session->out_buffer) + sizeof(uint32_t),
+      ssh_buffer_get_len(session->out_buffer) - sizeof(uint32_t));
+
+#ifdef DEBUG_CRYPTO
+  ssh_print_hexa("encrypted packet",ssh_buffer_get_begin(session->out_buffer),
+      ssh_buffer_get_len(session->out_buffer));
+#endif
+  rc=ssh_socket_write(session->socket, ssh_buffer_get_begin(session->out_buffer),
+      ssh_buffer_get_len(session->out_buffer));
+  if(rc== SSH_ERROR) {
+    goto error;
+  }
+
+  session->send_seq++;
+
+  if (buffer_reinit(session->out_buffer) < 0) {
+    rc = SSH_ERROR;
+  }
+error:
+  leave_function();
+  return rc;     /* SSH_OK, AGAIN or ERROR */
+}
+
+SSH_PACKET_CALLBACK(ssh_packet_disconnect1){
+  (void)packet;
+  (void)user;
+  (void)type;
+  ssh_log(session, SSH_LOG_PACKET, "Received SSH_MSG_DISCONNECT");
+  ssh_set_error(session, SSH_FATAL, "Received SSH_MSG_DISCONNECT");
+  ssh_socket_close(session->socket);
+  session->alive = 0;
+  session->session_state=SSH_SESSION_STATE_DISCONNECTED;
+  return SSH_PACKET_USED;
+}
+
+SSH_PACKET_CALLBACK(ssh_packet_smsg_success1){
+  if(session->session_state==SSH_SESSION_STATE_KEXINIT_RECEIVED){
+    session->session_state=SSH_SESSION_STATE_AUTHENTICATING;
+    return SSH_PACKET_USED;
+  } else if(session->session_state==SSH_SESSION_STATE_AUTHENTICATING){
+    ssh_auth1_handler(session,type);
+    return SSH_PACKET_USED;
+  } else {
+    return ssh_packet_channel_success(session,type,packet,user);
+  }
+}
+
+SSH_PACKET_CALLBACK(ssh_packet_smsg_failure1){
+  if(session->session_state==SSH_SESSION_STATE_KEXINIT_RECEIVED){
+    session->session_state=SSH_SESSION_STATE_ERROR;
+    ssh_set_error(session,SSH_FATAL,"Key exchange failed: received SSH_SMSG_FAILURE");
+    return SSH_PACKET_USED;
+  } else if(session->session_state==SSH_SESSION_STATE_AUTHENTICATING){
+    ssh_auth1_handler(session,type);
+    return SSH_PACKET_USED;
+  } else {
+    return ssh_packet_channel_failure(session,type,packet,user);
+  }
+}
+
+
+#endif /* WITH_SSH1 */
+
+/* vim: set ts=2 sw=2 et cindent: */