Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 486 insertions, 0 deletions

diff --git a/libcli/nbt/nbtname.c b/libcli/nbt/nbtname.c
new file mode 100644
index 0000000..a2b0d34
--- /dev/null
+++ b/libcli/nbt/nbtname.c
@@ -0,0 +1,486 @@
+/*
+   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, ndr_flags_type 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, ndr_flags_type 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, ndr_flags_type 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 (%"PRIu32") out of range (1 - 255)", namebuf_len);
+	}
+	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, ndr_flags_type 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_qtype(struct ndr_push *ndr, ndr_flags_type ndr_flags, enum nbt_qtype r)
+{
+	/* For WACK replies, we need to send NBT_QTYPE_NETBIOS on the wire. */
+	NDR_CHECK(ndr_push_enum_uint16(ndr, NDR_SCALARS, (r == NBT_QTYPE_WACK) ? NBT_QTYPE_NETBIOS : r));
+	return NDR_ERR_SUCCESS;
+}