Ejemplo n.º 1
0
smb_file  *smb_find(smb_session *s, smb_tid tid, const char *pattern)
{
  smb_message           *msg;
  smb_trans2_req        *tr2;
  smb_tr2_find2         *find;
  size_t                pattern_len, msg_len;
  int                   res;

  assert(s != NULL && pattern != NULL && tid);

  pattern_len = strlen(pattern) + 1;
  msg_len     = sizeof(smb_trans2_req) + sizeof(smb_tr2_find2);
  msg_len    += pattern_len * 2 + 3;

  msg = smb_message_new(SMB_CMD_TRANS2, msg_len);
  smb_message_set_default_flags(msg);
  msg->packet->header.tid = tid;

  tr2 = (smb_trans2_req *)msg->packet->payload;
  tr2->wct                = 15;
  tr2->total_param_count  = pattern_len * 2 + sizeof(smb_tr2_find2);
  tr2->max_param_count    = 10; // ?? Why not the same or 12 ?
  tr2->max_data_count     = 0xffff;
  tr2->param_count        = tr2->total_param_count;
  tr2->param_offset       = 68; // Offset of find_first_params in packet;
  tr2->data_count         = 0;
  tr2->data_offset        = 88; // Offset of pattern in packet
  tr2->setup_count        = 1;
  tr2->cmd                = SMB_TR2_FIND_FIRST;
  tr2->bct                = sizeof(smb_tr2_find2) + pattern_len * 2 + 3;

  find = (smb_tr2_find2 *) tr2->payload;
  find->attrs     = SMB_FIND2_ATTR_DEFAULT;
  find->count     = 1366;     // ??
  find->flags     = SMB_FIND2_FLAG_DEFAULT;
  find->interest  = 0x0104;   // 'Find file both directory info'

  smb_message_advance(msg, sizeof(smb_trans2_req));
  smb_message_advance(msg, sizeof(smb_tr2_find2));
  smb_message_put_utf16(msg, "", pattern, pattern_len);

  // Adds padding at the end if necessary.
  if (tr2->bct % 4)
    smb_message_advance(msg, 4 - tr2->bct % 4);

  res = smb_session_send_msg(s, msg);
  smb_message_destroy(msg);
  if (!res)
  {
    BDSM_dbg("Unable to query pattern: %s\n", pattern);
    return (NULL);
  }

  if ((msg = smb_tr2_recv(s)) == NULL)
    return (NULL);

  return (smb_find_parse(msg));
}
Ejemplo n.º 2
0
static int      negotiate(smb_session *s, const char *domain)
{
    smb_message           *msg = NULL;
    smb_session_xsec_req  req;
    smb_buffer            ntlm;
    ASN1_TYPE             token;
    int                   res, der_size = 128;
    char                  der[128], err_desc[ASN1_MAX_ERROR_DESCRIPTION_SIZE];

    msg = smb_message_new(SMB_CMD_SETUP);
    if (!msg)
        return DSM_ERROR_GENERIC;

    // this struct will be set at the end when we know the payload size
    SMB_MSG_ADVANCE_PKT(msg, smb_session_xsec_req);

    asn1_create_element(s->spnego_asn1, "SPNEGO.GSSAPIContextToken", &token);

    res = asn1_write_value(token, "thisMech", spnego_oid, 1);
    if (res != ASN1_SUCCESS) goto error;
    res = asn1_write_value(token, "spnego", "negTokenInit", 1);
    if (res != ASN1_SUCCESS) goto error;
    res = asn1_write_value(token, "spnego.negTokenInit.mechTypes", "NEW", 1);
    if (res != ASN1_SUCCESS) goto error;
    res = asn1_write_value(token, "spnego.negTokenInit.mechTypes.?1", ntlmssp_oid, 1);
    if (res != ASN1_SUCCESS) goto error;
    res = asn1_write_value(token, "spnego.negTokenInit.reqFlags", NULL, 0);
    if (res != ASN1_SUCCESS) goto error;
    res = asn1_write_value(token, "spnego.negTokenInit.mechListMIC", NULL, 0);
    if (res != ASN1_SUCCESS) goto error;

    smb_ntlmssp_negotiate(domain, domain, &ntlm);
    res = asn1_write_value(token, "spnego.negTokenInit.mechToken", ntlm.data,
                           ntlm.size);
    smb_buffer_free(&ntlm);
    if (res != ASN1_SUCCESS) goto error;

    res = asn1_der_coding(token, "", der, &der_size, err_desc);
    if (res != ASN1_SUCCESS)
    {
        smb_message_destroy(msg);
        BDSM_dbg("Encoding error: %s", err_desc);
        return DSM_ERROR_GENERIC;
    }

    smb_message_append(msg, der, der_size);
    smb_message_put_utf16(msg, SMB_OS, strlen(SMB_OS));
    smb_message_put16(msg, 0);
    smb_message_put_utf16(msg, SMB_LANMAN, strlen(SMB_LANMAN));
    smb_message_put16(msg, 0);
    smb_message_put16(msg, 0);

    SMB_MSG_INIT_PKT_ANDX(req);
    req.wct              = 12;
    req.max_buffer       = SMB_SESSION_MAX_BUFFER;
    req.mpx_count        = 16;
    req.vc_count         = 1;
    req.caps             = s->srv.caps;
    req.session_key      = s->srv.session_key;
    req.xsec_blob_size = der_size;
    req.payload_size   = msg->cursor - sizeof(smb_session_xsec_req);
    SMB_MSG_INSERT_PKT(msg, 0, req);

    asn1_delete_structure(&token);

    if (!smb_session_send_msg(s, msg))
    {
        smb_message_destroy(msg);
        BDSM_dbg("Unable to send Session Setup AndX (NTLMSSP_NEGOTIATE) message\n");
        return DSM_ERROR_NETWORK;
    }

    smb_message_destroy(msg);
    return DSM_SUCCESS;

error:
    asn1_display_error("smb_session_login negotiate()", res);
    smb_message_destroy(msg);
    return DSM_ERROR_GENERIC;
}
Ejemplo n.º 3
0
static int      auth(smb_session *s, const char *domain, const char *user,
                     const char *password)
{
    smb_message           *msg = NULL, resp;
    smb_session_xsec_req  req;
    smb_buffer            ntlm;
    ASN1_TYPE             token;
    int                   res, der_size = 512;
    char                  der[512], err_desc[ASN1_MAX_ERROR_DESCRIPTION_SIZE];

    msg = smb_message_new(SMB_CMD_SETUP);
    if (!msg)
        return DSM_ERROR_GENERIC;

    // this struct will be set at the end when we know the payload size
    SMB_MSG_ADVANCE_PKT(msg, smb_session_xsec_req);

    asn1_create_element(s->spnego_asn1, "SPNEGO.NegotiationToken", &token);

    // Select a response message type
    res = asn1_write_value(token, "", "negTokenResp", 1);
    if (res != ASN1_SUCCESS) goto error;

    // Delete all optionnal field except 'ResponseToken'
    res = asn1_write_value(token, "negTokenResp.negResult", NULL, 0);
    if (res != ASN1_SUCCESS) goto error;
    res = asn1_write_value(token, "negTokenResp.supportedMech", NULL, 0);
    if (res != ASN1_SUCCESS) goto error;
    res = asn1_write_value(token, "negTokenResp.mechListMIC", NULL, 0);
    if (res != ASN1_SUCCESS) goto error;


    smb_ntlmssp_response(s->srv.challenge, s->srv.ts - 4200, domain, domain, user,
                         password, &s->xsec_target, &ntlm);
    res = asn1_write_value(token, "negTokenResp.responseToken", ntlm.data,
                           ntlm.size);
    smb_buffer_free(&ntlm);
    if (res != ASN1_SUCCESS) goto error;

    res = asn1_der_coding(token, "", der, &der_size, err_desc);
    if (res != ASN1_SUCCESS)
    {
        smb_message_destroy(msg);
        BDSM_dbg("Encoding error: %s", err_desc);
        return DSM_ERROR_GENERIC;
    }

    smb_message_append(msg, der, der_size);
    if (msg->cursor % 2)
        smb_message_put8(msg, 0);
    smb_message_put_utf16(msg, SMB_OS, strlen(SMB_OS));
    smb_message_put16(msg, 0);
    smb_message_put_utf16(msg, SMB_LANMAN, strlen(SMB_LANMAN));
    smb_message_put16(msg, 0);
    smb_message_put16(msg, 0); // Empty PDC name

    SMB_MSG_INIT_PKT_ANDX(req);
    req.wct              = 12;
    req.max_buffer       = SMB_SESSION_MAX_BUFFER;
    req.mpx_count        = 16; // XXX ?
    req.vc_count         = 1;
    req.caps             = s->srv.caps; // XXX caps & our_caps_mask
    req.session_key      = s->srv.session_key;
    req.xsec_blob_size = der_size;
    req.payload_size   = msg->cursor - sizeof(smb_session_xsec_req);
    SMB_MSG_INSERT_PKT(msg, 0, req);

    asn1_delete_structure(&token);

    if (!smb_session_send_msg(s, msg))
    {
        smb_message_destroy(msg);
        BDSM_dbg("Unable to send Session Setup AndX (NTLMSSP_AUTH) message\n");
        return DSM_ERROR_NETWORK;
    }
    smb_message_destroy(msg);

    if (smb_session_recv_msg(s, &resp) == 0)
        return DSM_ERROR_NETWORK;

    if (!smb_session_check_nt_status(s, &resp))
        return DSM_ERROR_NT;
    else
    {
        smb_session_xsec_resp *r = (smb_session_xsec_resp *)resp.packet->payload;
        if (r->action & 0x0001)
            s->guest = true;

        s->srv.uid  = resp.packet->header.uid;
        s->logged = true;

        return DSM_SUCCESS;
    }

error:
    asn1_display_error("smb_session_login auth()", res);
    smb_message_destroy(msg);
    return DSM_ERROR_GENERIC;
}
Ejemplo n.º 4
0
smb_file  *smb_fstat(smb_session *s, smb_tid tid, const char *path)
{
  smb_message           *msg, reply;
  smb_trans2_req        *tr2;
  smb_trans2_resp       *tr2_resp;
  smb_tr2_query         *query;
  smb_tr2_path_info     *info;
  smb_file              *file;
  size_t                path_len, msg_len;
  int                   res;

  assert(s != NULL && path != NULL && tid);

  path_len  = strlen(path) + 1;
  msg_len   = sizeof(smb_trans2_req) + sizeof(smb_tr2_query);
  msg_len  += path_len * 2 + 3; // +3 for eventual padding

  msg = smb_message_new(SMB_CMD_TRANS2, msg_len);
  smb_message_set_default_flags(msg);
  msg->packet->header.tid = tid;

  tr2 = (smb_trans2_req *)msg->packet->payload;
  tr2->wct                = 15;
  tr2->total_param_count  = path_len * 2 + sizeof(smb_tr2_query);
  tr2->max_param_count    = 2; // ?? Why not the same or 12 ?
  tr2->max_data_count     = 0xffff;
  tr2->param_count        = tr2->total_param_count;
  tr2->param_offset       = 68; // Offset of find_first_params in packet;
  tr2->data_count         = 0;
  tr2->data_offset        = 96; // Offset of pattern in packet
  tr2->setup_count        = 1;
  tr2->cmd                = SMB_TR2_QUERY_PATH;
  tr2->bct                = sizeof(smb_tr2_query) + path_len * 2 + 3;

  query = (smb_tr2_query *)tr2->payload;
  query->interest   = 0x0107;   // Query File All Info

  smb_message_advance(msg, sizeof(smb_trans2_req));
  smb_message_advance(msg, sizeof(smb_tr2_query));
  smb_message_put_utf16(msg, "", path, path_len);

  // Adds padding at the end if necessary.
  if (msg->cursor % 4)
  {
    int padding = 4 - msg->cursor % 4;
    tr2->bct += padding;
    for (int i = 0; i < padding; i++)
      smb_message_put8(msg, 0);
  }

  res = smb_session_send_msg(s, msg);
  smb_message_destroy(msg);
  if (!res)
  {
    BDSM_dbg("Unable to query pattern: %s\n", path);
    return (NULL);
  }

  if (!smb_session_recv_msg(s, &reply)
      || reply.packet->header.status != NT_STATUS_SUCCESS)
  {
    BDSM_dbg("Unable to recv msg or failure for %s\n", path);
    return (NULL);
  }

  tr2_resp  = (smb_trans2_resp *)reply.packet->payload;
  info      = (smb_tr2_path_info *)(tr2_resp->payload + 4); //+4 is padding
  file      = calloc(1, sizeof(smb_file));
  assert(file != NULL);

  file->name_len  = smb_from_utf16((const char *)info->name, info->name_len,
                                  &file->name);
  file->name[info->name_len] = 0;

  file->created     = info->created;
  file->accessed    = info->accessed;
  file->written     = info->written;
  file->changed     = info->changed;
  file->alloc_size  = info->alloc_size;
  file->size        = info->size;
  file->attr        = info->attr;
  file->is_dir      = info->is_dir;

  return (file);
}
Ejemplo n.º 5
0
// We should normally implement SCERPC and SRVSVC to perform a share list. But
// since these two protocols have no other use for us, we'll do it the trash way
// PS: Worst function _EVER_. I don't understand a bit myself
int             smb_share_get_list(smb_session *s, smb_share_list *list, size_t *pcount)
{
    smb_message           *req, resp;
    smb_trans_req         trans;
    smb_tid               ipc_tid;
    smb_fd                srvscv_fd;
    uint16_t              rpc_len;
    size_t                res, frag_len_cursor;
    ssize_t               count;
    int                   ret;

    assert(s != NULL && list != NULL);

    if(s != NULL && list != NULL) {

        *list = NULL;

        if ((ret = smb_tree_connect(s, "IPC$", &ipc_tid)) != DSM_SUCCESS)
            return ret;

        if ((ret = smb_fopen(s, ipc_tid, "\\srvsvc", SMB_MOD_READ | SMB_MOD_WRITE,
                             &srvscv_fd)) != DSM_SUCCESS)
            return ret;

        //// Phase 1:
        // We bind a context or whatever for DCE/RPC

        req = smb_message_new(SMD_CMD_TRANS);
        if (!req)
        {
            ret = DSM_ERROR_GENERIC;
            goto error;
        }
        req->packet->header.tid = ipc_tid;

        rpc_len = 0xffff;
        SMB_MSG_INIT_PKT(trans);
        trans.wct                    = 16;
        trans.total_data_count       = 72;
        trans.max_data_count         = rpc_len;
        trans.param_offset           = 84;
        trans.data_count             = 72;
        trans.data_offset            = 84;
        trans.setup_count            = 2;
        trans.pipe_function          = 0x26;
        trans.fid                    = SMB_FD_FID(srvscv_fd);
        trans.bct                    = 89;
        SMB_MSG_PUT_PKT(req, trans);

        smb_message_put8(req, 0);   // Padding
        smb_message_put_utf16(req, "\\PIPE\\", strlen("\\PIPE\\") + 1);
        smb_message_put16(req, 0);  // Padding to be aligned with wtf boundary :-/

        // Now we'll 'build' the DCE/RPC Packet. This basically a copycat
        // from wireshark values.
        smb_message_put8(req, 5);     // version major
        smb_message_put8(req, 0);     // minor
        smb_message_put8(req, 0x0b);  // Packet type = 'bind'
        smb_message_put8(req, 0x03);  // Packet flags = ??
        smb_message_put32(req, 0x10); // Representation = little endian/ASCII. Damn
        smb_message_put16(req, 72);   // Data len again
        smb_message_put16(req, 0);    // Auth len ?
        smb_message_put32(req, 19);   // Call ID ?
        smb_message_put16(req, rpc_len);      // Max Xmit size
        smb_message_put16(req, rpc_len);      // Max Recv size
        smb_message_put32(req, 0);    // Assoc group ?

        smb_message_put32(req, 1);    // Num Ctx Item
        // Adding the CtxItem, whatever could that be
        smb_message_put16(req, 0);    // ContextID
        smb_message_put16(req, 1);    // Num Trans Item
        // SRVSVC UUID
        const uint8_t uuid_e[8] = {0x12, 0x78, 0x5a, 0x47, 0xbf, 0x6e, 0xe1, 0x88};
        smb_message_put_uuid(req, 0x4b324fc8, 0x1670, 0x01d3, uuid_e);
        smb_message_put16(req, 3);    // Version
        smb_message_put16(req, 0);    // Minor
        // Another UUID
        const uint8_t uuid_e2[8] = {0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60};
        smb_message_put_uuid(req, 0x8a885d04, 0x1ceb, 0x11c9, uuid_e2);
        smb_message_put32(req, 2);    // Another version

        // Let's send this ugly pile of shit over the network !
        res = smb_session_send_msg(s, req);
        smb_message_destroy(req);
        if (!res)
        {
            ret = DSM_ERROR_NETWORK;
            goto error;
        }

        // Is the server throwing pile of shit back at me ?
        res = smb_session_recv_msg(s, &resp);
        if (!res || resp.packet->payload[68])
        {
            BDSM_dbg("Bind call failed: 0x%hhx (reason = 0x%hhx)\n",
                     resp.packet->payload[68], resp.packet->payload[70]);
            ret = DSM_ERROR_NETWORK;
            goto error;
        }


        //// Phase 2:
        // Now we have the 'bind' done (regarless of what it is), we'll call
        // NetShareEnumAll

        req = smb_message_new(SMD_CMD_TRANS);
        if (!req)
        {
            ret = DSM_ERROR_GENERIC;
            goto error;
        }
        req->packet->header.tid = ipc_tid;

        // this struct will be set at the end when we know the data size
        SMB_MSG_ADVANCE_PKT(req, smb_trans_req);

        smb_message_put8(req, 0);  // Padding
        smb_message_put_utf16(req, "\\PIPE\\", strlen("\\PIPE\\") + 1);
        smb_message_put16(req, 0); // Padding

        // Now we'll 'build' the DCE/RPC Packet. This basically a copycat
        // from wireshark values.
        smb_message_put8(req, 5);     // version major
        smb_message_put8(req, 0);     // minor
        smb_message_put8(req, 0);     // Packet type = 'request'
        smb_message_put8(req, 0x03);  // Packet flags = ??
        smb_message_put32(req, 0x10); // Representation = little endian/ASCII. Damn
        // Let's save the cursor here to update that later
        frag_len_cursor = req->cursor;
        smb_message_put16(req, 0);    // Data len again (frag length)
        smb_message_put16(req, 0);    // Auth len ?
        smb_message_put32(req, 12);   // Call ID ?
        smb_message_put32(req, 64);   // Alloc hint ?
        smb_message_put16(req, 0);    // Context ID ?
        smb_message_put16(req, 15);   // OpNum = NetShareEnumAll

        // Pointer to server UNC
        smb_message_put32(req, 0x00020000);   // Referent ID ?
        smb_message_put32(req, strlen(s->srv.name) + 1);            // Max count
        smb_message_put32(req, 0);            // Offset
        smb_message_put32(req, strlen(s->srv.name) + 1);            // Actual count
        // The server name, supposed to be downcased
        smb_message_put_utf16(req, s->srv.name, strlen(s->srv.name) + 1);
        if ((strlen(s->srv.name) % 2) == 0) // It won't be aligned with the terminating byte
            smb_message_put16(req, 0);

        smb_message_put32(req, 1);            // Level 1 ?
        smb_message_put32(req, 1);            // Ctr ?
        smb_message_put32(req, 0x00020004);   // Referent ID ?
        smb_message_put64(req, 0);            // Count/Null Pointer to NetShareInfo1
        smb_message_put32(req, 0xffffffff);   // Max Buffer (0xffffffff required by smbX)

        smb_message_put32(req, 0x00020008);   // Referent ID ?
        smb_message_put32(req, 0);            // Resume ?

        // fill trans pkt at the end since we know the size at the end
        SMB_MSG_INIT_PKT(trans);
        trans.wct              = 16;
        trans.max_data_count   = 4280;
        trans.setup_count      = 2;
        trans.pipe_function    = 0x26; // TransactNmPipe;
        trans.fid              = SMB_FD_FID(srvscv_fd);
        trans.bct              = req->cursor - sizeof(smb_trans_req);
        trans.data_count       = trans.bct - 17; // 17 -> padding + \PIPE\ + padding
        trans.total_data_count = trans.data_count;
        trans.data_offset      = 84;
        trans.param_offset     = 84;
        // but insert it at the begining
        SMB_MSG_INSERT_PKT(req, 0, trans);

        req->packet->payload[frag_len_cursor] = trans.data_count; // (data_count SHOULD stay < 256)

        // Let's send this ugly pile of shit over the network !
        res = smb_session_send_msg(s, req);
        smb_message_destroy(req);
        if (!res)
        {
            ret = DSM_ERROR_NETWORK;
            goto error;
        }

        // Is the server throwing pile of shit back at me ?
        res = smb_session_recv_msg(s, &resp);
        if (!res && (uint32_t)resp.packet->payload[resp.payload_size - 4])
        {
            BDSM_dbg("NetShareEnumAll call failed.\n");
            ret = DSM_ERROR_NETWORK;
            goto error;
        }


        //// Phase 3
        // We parse the list of Share (finally !) and build function response
        count = smb_share_parse_enum(&resp, list);
        if (count == -1)
        {
            ret = DSM_ERROR_GENERIC;
            goto error;
        }
        if (pcount != NULL)
            *pcount = count;
        ret = DSM_SUCCESS;

error:
        // Close the pipe
        smb_fclose(s, srvscv_fd);
        return ret;
    }

    ret = DSM_ERROR_GENERIC;
}