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-rw-r--r--libcli/nbt/nbtname.c500
1 files changed, 500 insertions, 0 deletions
diff --git a/libcli/nbt/nbtname.c b/libcli/nbt/nbtname.c
new file mode 100644
index 0000000..ec2b395
--- /dev/null
+++ b/libcli/nbt/nbtname.c
@@ -0,0 +1,500 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ manipulate nbt name structures
+
+ Copyright (C) Andrew Tridgell 2005
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ see rfc1002 for the detailed format of compressed names
+*/
+
+#include "includes.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
+#include "librpc/gen_ndr/ndr_misc.h"
+#include "system/locale.h"
+#include "lib/util/util_net.h"
+#include "libcli/nbt/libnbt.h"
+
+/*
+ decompress a 'compressed' name component
+ */
+static bool decompress_name(char *name, enum nbt_name_type *type)
+{
+ int i;
+ for (i=0;name[2*i];i++) {
+ uint8_t c1 = name[2*i];
+ uint8_t c2 = name[1+(2*i)];
+ if (c1 < 'A' || c1 > 'P' ||
+ c2 < 'A' || c2 > 'P') {
+ return false;
+ }
+ name[i] = ((c1-'A')<<4) | (c2-'A');
+ }
+ name[i] = 0;
+ if (i == 16) {
+ *type = (enum nbt_name_type)(name[15]);
+ name[15] = 0;
+ i--;
+ } else {
+ *type = NBT_NAME_CLIENT;
+ }
+
+ /* trim trailing spaces */
+ for (;i>0 && name[i-1]==' ';i--) {
+ name[i-1] = 0;
+ }
+
+ return true;
+}
+
+
+/*
+ compress a name component
+ */
+static uint8_t *compress_name(TALLOC_CTX *mem_ctx,
+ const uint8_t *name, enum nbt_name_type type)
+{
+ uint8_t *cname;
+ int i;
+ uint8_t pad_char;
+
+ if (strlen((const char *)name) > 15) {
+ return NULL;
+ }
+
+ cname = talloc_array(mem_ctx, uint8_t, 33);
+ if (cname == NULL) return NULL;
+
+ for (i=0;name[i];i++) {
+ cname[2*i] = 'A' + (name[i]>>4);
+ cname[1+2*i] = 'A' + (name[i]&0xF);
+ }
+ if (strcmp((const char *)name, "*") == 0) {
+ pad_char = 0;
+ } else {
+ pad_char = ' ';
+ }
+ for (;i<15;i++) {
+ cname[2*i] = 'A' + (pad_char>>4);
+ cname[1+2*i] = 'A' + (pad_char&0xF);
+ }
+
+ pad_char = type;
+ cname[2*i] = 'A' + (pad_char>>4);
+ cname[1+2*i] = 'A' + (pad_char&0xF);
+
+ cname[32] = 0;
+ return cname;
+}
+
+
+/**
+ pull a nbt name from the wire
+*/
+_PUBLIC_ enum ndr_err_code ndr_pull_nbt_name(struct ndr_pull *ndr, int ndr_flags, struct nbt_name *r)
+{
+ uint8_t *scope;
+ char *cname;
+ const char *s;
+ bool ok;
+
+ if (!(ndr_flags & NDR_SCALARS)) {
+ return NDR_ERR_SUCCESS;
+ }
+
+ NDR_CHECK(ndr_pull_nbt_string(ndr, ndr_flags, &s));
+
+ scope = (uint8_t *)strchr(s, '.');
+ if (scope) {
+ *scope = 0;
+ r->scope = talloc_strdup(ndr->current_mem_ctx, (const char *)&scope[1]);
+ NDR_ERR_HAVE_NO_MEMORY(r->scope);
+ } else {
+ r->scope = NULL;
+ }
+
+ cname = discard_const_p(char, s);
+
+ /* the first component is limited to 16 bytes in the DOS charset,
+ which is 32 in the 'compressed' form */
+ if (strlen(cname) > 32) {
+ return ndr_pull_error(ndr, NDR_ERR_STRING,
+ "NBT NAME cname > 32");
+ }
+
+ /* decompress the first component */
+ ok = decompress_name(cname, &r->type);
+ if (!ok) {
+ return ndr_pull_error(ndr, NDR_ERR_STRING,
+ "NBT NAME failed to decompress");
+ }
+
+ r->name = talloc_strdup(ndr->current_mem_ctx, cname);
+ NDR_ERR_HAVE_NO_MEMORY(r->name);
+
+ talloc_free(cname);
+
+ return NDR_ERR_SUCCESS;
+}
+
+/**
+ push a nbt name to the wire
+*/
+_PUBLIC_ enum ndr_err_code ndr_push_nbt_name(struct ndr_push *ndr, int ndr_flags, const struct nbt_name *r)
+{
+ uint8_t *cname, *fullname;
+ enum ndr_err_code ndr_err;
+
+ if (!(ndr_flags & NDR_SCALARS)) {
+ return NDR_ERR_SUCCESS;
+ }
+
+ if (strlen(r->name) > 15) {
+ return ndr_push_error(ndr, NDR_ERR_STRING,
+ "nbt_name longer as 15 chars: %s",
+ r->name);
+ }
+
+ cname = compress_name(ndr, (const uint8_t *)r->name, r->type);
+ NDR_ERR_HAVE_NO_MEMORY(cname);
+
+ if (r->scope) {
+ fullname = (uint8_t *)talloc_asprintf(ndr, "%s.%s", cname, r->scope);
+ NDR_ERR_HAVE_NO_MEMORY(fullname);
+ talloc_free(cname);
+ } else {
+ fullname = cname;
+ }
+
+ ndr_err = ndr_push_nbt_string(ndr, ndr_flags, (const char *)fullname);
+
+ return ndr_err;
+}
+
+
+/**
+ copy a nbt name structure
+*/
+_PUBLIC_ NTSTATUS nbt_name_dup(TALLOC_CTX *mem_ctx,
+ const struct nbt_name *name,
+ struct nbt_name *newname)
+{
+ *newname = *name;
+ newname->name = talloc_strdup(mem_ctx, newname->name);
+ NT_STATUS_HAVE_NO_MEMORY(newname->name);
+ newname->scope = talloc_strdup(mem_ctx, newname->scope);
+ if (name->scope) {
+ NT_STATUS_HAVE_NO_MEMORY(newname->scope);
+ }
+ return NT_STATUS_OK;
+}
+
+/**
+ push a nbt name into a blob
+*/
+_PUBLIC_ NTSTATUS nbt_name_to_blob(TALLOC_CTX *mem_ctx, DATA_BLOB *blob, struct nbt_name *name)
+{
+ enum ndr_err_code ndr_err;
+
+ ndr_err = ndr_push_struct_blob(blob, mem_ctx, name, (ndr_push_flags_fn_t)ndr_push_nbt_name);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return ndr_map_error2ntstatus(ndr_err);
+ }
+
+ return NT_STATUS_OK;
+}
+
+/**
+ pull a nbt name from a blob
+*/
+_PUBLIC_ NTSTATUS nbt_name_from_blob(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob, struct nbt_name *name)
+{
+ enum ndr_err_code ndr_err;
+
+ ndr_err = ndr_pull_struct_blob(blob, mem_ctx, name,
+ (ndr_pull_flags_fn_t)ndr_pull_nbt_name);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return ndr_map_error2ntstatus(ndr_err);
+ }
+
+ return NT_STATUS_OK;
+}
+
+
+/**
+ choose a name to use when calling a server in a NBT session request.
+ we use heuristics to see if the name we have been given is a IP
+ address, or a too-long name. If it is then use *SMBSERVER, or a
+ truncated name
+*/
+_PUBLIC_ void nbt_choose_called_name(TALLOC_CTX *mem_ctx,
+ struct nbt_name *n, const char *name, int type)
+{
+ n->scope = NULL;
+ n->type = type;
+
+ if ((name == NULL) || is_ipaddress(name)) {
+ n->name = "*SMBSERVER";
+ return;
+ }
+ if (strlen(name) > 15) {
+ const char *p = strchr(name, '.');
+ char *s;
+ if (p - name > 15) {
+ n->name = "*SMBSERVER";
+ return;
+ }
+ s = talloc_strndup(mem_ctx, name, PTR_DIFF(p, name));
+ n->name = talloc_strdup_upper(mem_ctx, s);
+ return;
+ }
+
+ n->name = talloc_strdup_upper(mem_ctx, name);
+}
+
+
+/*
+ escape a string into a form containing only a small set of characters,
+ the rest is hex encoded. This is similar to URL encoding
+*/
+static const char *nbt_hex_encode(TALLOC_CTX *mem_ctx, const char *s)
+{
+ int i, len;
+ char *ret;
+ const char *valid_chars = "_-.$@ ";
+#define NBT_CHAR_ALLOW(c) (isalnum((unsigned char)c) || strchr(valid_chars, c))
+
+ for (len=i=0;s[i];i++,len++) {
+ if (!NBT_CHAR_ALLOW(s[i])) {
+ len += 2;
+ }
+ }
+
+ ret = talloc_array(mem_ctx, char, len+1);
+ if (ret == NULL) return NULL;
+
+ for (len=i=0;s[i];i++) {
+ if (NBT_CHAR_ALLOW(s[i])) {
+ ret[len++] = s[i];
+ } else {
+ snprintf(&ret[len], 4, "%%%02x", (unsigned char)s[i]);
+ len += 3;
+ }
+ }
+ ret[len] = 0;
+
+ return ret;
+}
+
+
+/**
+ form a string for a NBT name
+*/
+_PUBLIC_ char *nbt_name_string(TALLOC_CTX *mem_ctx, const struct nbt_name *name)
+{
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ char *ret;
+ if (name->scope) {
+ ret = talloc_asprintf(mem_ctx, "%s<%02x>-%s",
+ nbt_hex_encode(tmp_ctx, name->name),
+ name->type,
+ nbt_hex_encode(tmp_ctx, name->scope));
+ } else {
+ ret = talloc_asprintf(mem_ctx, "%s<%02x>",
+ nbt_hex_encode(tmp_ctx, name->name),
+ name->type);
+ }
+ talloc_free(tmp_ctx);
+ return ret;
+}
+
+/**
+ pull a nbt name, WINS Replication uses another on wire format for nbt name
+*/
+_PUBLIC_ enum ndr_err_code ndr_pull_wrepl_nbt_name(struct ndr_pull *ndr, int ndr_flags, struct nbt_name **_r)
+{
+ struct nbt_name *r;
+ uint8_t *namebuf;
+ uint32_t namebuf_len;
+
+ if (!(ndr_flags & NDR_SCALARS)) {
+ return NDR_ERR_SUCCESS;
+ }
+
+ NDR_CHECK(ndr_pull_align(ndr, 4));
+ NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &namebuf_len));
+ if (namebuf_len < 1 || namebuf_len > 255) {
+ return ndr_pull_error(ndr, NDR_ERR_ALLOC, "value out of range");
+ }
+ NDR_PULL_ALLOC_N(ndr, namebuf, namebuf_len);
+ NDR_CHECK(ndr_pull_array_uint8(ndr, NDR_SCALARS, namebuf, namebuf_len));
+
+ if ((namebuf_len % 4) == 0) {
+ /*
+ * [MS-WINSRA] — v20091104 was wrong
+ * regarding section "2.2.10.1 Name Record"
+ *
+ * If the name buffer is already 4 byte aligned
+ * Windows (at least 2003 SP1 and 2008) add 4 extra
+ * bytes. This can happen when the name has a scope.
+ */
+ uint32_t pad;
+ NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &pad));
+ }
+
+ NDR_PULL_ALLOC(ndr, r);
+
+ /* oh wow, what a nasty bug in windows ... */
+ if (namebuf[0] == 0x1b && namebuf_len >= 16) {
+ namebuf[0] = namebuf[15];
+ namebuf[15] = 0x1b;
+ }
+
+ if (namebuf_len < 17) {
+ r->type = 0x00;
+
+ r->name = talloc_strndup(r, (char *)namebuf, namebuf_len);
+ if (!r->name) return ndr_pull_error(ndr, NDR_ERR_ALLOC, "out of memory");
+
+ r->scope= NULL;
+
+ talloc_free(namebuf);
+ *_r = r;
+ return NDR_ERR_SUCCESS;
+ }
+
+ r->type = namebuf[15];
+
+ namebuf[15] = '\0';
+ trim_string((char *)namebuf, NULL, " ");
+ r->name = talloc_strdup(r, (char *)namebuf);
+ if (!r->name) return ndr_pull_error(ndr, NDR_ERR_ALLOC, "out of memory");
+
+ if (namebuf_len > 17) {
+ r->scope = talloc_strndup(r, (char *)(namebuf+16), namebuf_len-17);
+ if (!r->scope) return ndr_pull_error(ndr, NDR_ERR_ALLOC, "out of memory");
+ } else {
+ r->scope = NULL;
+ }
+
+ talloc_free(namebuf);
+ *_r = r;
+ return NDR_ERR_SUCCESS;
+}
+
+/**
+ push a nbt name, WINS Replication uses another on wire format for nbt name
+*/
+_PUBLIC_ enum ndr_err_code ndr_push_wrepl_nbt_name(struct ndr_push *ndr, int ndr_flags, const struct nbt_name *r)
+{
+ uint8_t *namebuf;
+ uint32_t namebuf_len;
+ uint32_t _name_len;
+ uint32_t scope_len = 0;
+
+ if (r == NULL) {
+ return ndr_push_error(ndr, NDR_ERR_INVALID_POINTER,
+ "wrepl_nbt_name NULL pointer");
+ }
+
+ if (!(ndr_flags & NDR_SCALARS)) {
+ return NDR_ERR_SUCCESS;
+ }
+
+ _name_len = strlen(r->name);
+ if (_name_len > 15) {
+ return ndr_push_error(ndr, NDR_ERR_STRING,
+ "wrepl_nbt_name longer as 15 chars: %s",
+ r->name);
+ }
+
+ if (r->scope) {
+ scope_len = strlen(r->scope);
+ }
+ if (scope_len > 238) {
+ return ndr_push_error(ndr, NDR_ERR_STRING,
+ "wrepl_nbt_name scope longer as 238 chars: %s",
+ r->scope);
+ }
+
+ namebuf = (uint8_t *)talloc_asprintf(ndr, "%-15s%c%s",
+ r->name, 'X',
+ (r->scope?r->scope:""));
+ if (!namebuf) return ndr_push_error(ndr, NDR_ERR_ALLOC, "out of memory");
+
+ namebuf_len = strlen((char *)namebuf) + 1;
+
+ /*
+ * we need to set the type here, and use a place-holder in the talloc_asprintf()
+ * as the type can be 0x00, and then the namebuf_len = strlen(namebuf); would give wrong results
+ */
+ namebuf[15] = r->type;
+
+ /* oh wow, what a nasty bug in windows ... */
+ if (r->type == 0x1b) {
+ namebuf[15] = namebuf[0];
+ namebuf[0] = 0x1b;
+ }
+
+ NDR_CHECK(ndr_push_align(ndr, 4));
+ NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, namebuf_len));
+ NDR_CHECK(ndr_push_array_uint8(ndr, NDR_SCALARS, namebuf, namebuf_len));
+
+ if ((namebuf_len % 4) == 0) {
+ /*
+ * [MS-WINSRA] — v20091104 was wrong
+ * regarding section "2.2.10.1 Name Record"
+ *
+ * If the name buffer is already 4 byte aligned
+ * Windows (at least 2003 SP1 and 2008) add 4 extra
+ * bytes. This can happen when the name has a scope.
+ */
+ NDR_CHECK(ndr_push_zero(ndr, 4));
+ }
+
+ talloc_free(namebuf);
+ return NDR_ERR_SUCCESS;
+}
+
+_PUBLIC_ void ndr_print_wrepl_nbt_name(struct ndr_print *ndr, const char *name, const struct nbt_name *r)
+{
+ char *s = nbt_name_string(ndr, r);
+ ndr_print_string(ndr, name, s);
+ talloc_free(s);
+}
+
+_PUBLIC_ enum ndr_err_code ndr_push_nbt_res_rec(struct ndr_push *ndr, int ndr_flags, const struct nbt_res_rec *r)
+{
+ {
+ uint32_t _flags_save_STRUCT = ndr->flags;
+ ndr_set_flags(&ndr->flags, LIBNDR_PRINT_ARRAY_HEX);
+ if (ndr_flags & NDR_SCALARS) {
+ NDR_CHECK(ndr_push_align(ndr, 4));
+ NDR_CHECK(ndr_push_nbt_name(ndr, NDR_SCALARS, &r->name));
+ NDR_CHECK(ndr_push_nbt_qtype(ndr, NDR_SCALARS, r->rr_type));
+ NDR_CHECK(ndr_push_nbt_qclass(ndr, NDR_SCALARS, r->rr_class));
+ NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, r->ttl));
+ NDR_CHECK(ndr_push_set_switch_value(ndr, &r->rdata, ((((r->rr_type) == NBT_QTYPE_NETBIOS) && ((r->rdata).data.length == 2))?0:r->rr_type)));
+ NDR_CHECK(ndr_push_nbt_rdata(ndr, NDR_SCALARS, &r->rdata));
+ }
+ if (ndr_flags & NDR_BUFFERS) {
+ }
+ ndr->flags = _flags_save_STRUCT;
+ }
+ return NDR_ERR_SUCCESS;
+}
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