Share ndrdump implementation.

2 files changed, 544 insertions, 0 deletions

diff --git a/librpc/tools/ndrdump.1.xml b/librpc/tools/ndrdump.1.xml
new file mode 100644
index 0000000000..9d66102682
--- /dev/null
+++ b/librpc/tools/ndrdump.1.xml
@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!DOCTYPE refentry PUBLIC "-//Samba-Team//DTD DocBook V4.2-Based Variant V1.0//EN" "http://www.samba.org/samba/DTD/samba-doc">
+<refentry id="ndrdump.1">
+
+<refmeta>
+	<refentrytitle>ndrdump</refentrytitle>
+	<manvolnum>1</manvolnum>
+</refmeta>
+
+
+<refnamediv>
+	<refname>ndrdump</refname>
+	<refpurpose>DCE/RPC Packet Parser and Dumper</refpurpose>
+</refnamediv>
+
+<refsynopsisdiv>
+	<cmdsynopsis>
+		<command>ndrdump</command>
+		<arg choice="opt">-c context</arg>
+		<arg choice="req">pipe</arg>
+		<arg choice="req">function</arg>
+		<arg choice="req">in|out</arg>
+		<arg choice="req">filename</arg>
+	</cmdsynopsis>
+	<cmdsynopsis>
+		<command>ndrdump</command>
+		<arg choice="opt">pipe</arg>
+	</cmdsynopsis>
+	<cmdsynopsis>
+		<command>ndrdump</command>
+	</cmdsynopsis>
+</refsynopsisdiv>
+
+<refsect1>
+	<title>DESCRIPTION</title>
+
+	<para>ndrdump tries to parse the specified <replaceable>filename</replaceable>
+		using Samba's parser for the specified pipe and function. The 
+		third argument should be 
+		either <emphasis>in</emphasis> or <emphasis>out</emphasis>, depending 
+		on whether the data should be parsed as a request or a reply.</para>
+
+	<para>Running ndrdump without arguments will list the pipes for which 
+		parsers are available.</para>
+
+	<para>Running ndrdump with one argument will list the functions that 
+		Samba can parse for the specified pipe.</para>
+
+	<para>The primary function of ndrdump is debugging Samba's internal 
+		DCE/RPC parsing functions. The file being parsed is usually 
+		one exported by wiresharks <quote>Export selected packet bytes</quote> 
+		function.</para>
+
+	<para>The context argument can be used to load context data from the request 
+		packet when parsing reply packets (such as array lengths).</para>
+
+</refsect1>
+
+<refsect1>
+	<title>VERSION</title>
+
+	<para>This man page is correct for version 4.0 of the Samba suite.</para>
+</refsect1>
+
+<refsect1>
+	<title>SEE ALSO</title>
+
+	<para>wireshark, pidl</para>
+
+</refsect1>
+
+<refsect1>
+	<title>AUTHOR</title>
+
+	<para>This utility is part of the <ulink url="http://www.samba.org/">Samba</ulink> suite, which is developed by the global <ulink url="http://www.samba.org/samba/team/">Samba Team</ulink>.</para>
+
+	<para>ndrdump was written by Andrew Tridgell. </para>
+
+	<para>This manpage was written by Jelmer Vernooij. </para>
+	
+</refsect1>
+
+</refentry>
diff --git a/librpc/tools/ndrdump.c b/librpc/tools/ndrdump.c
new file mode 100644
index 0000000000..3ecf10a167
--- /dev/null
+++ b/librpc/tools/ndrdump.c
@@ -0,0 +1,461 @@
+/* 
+   Unix SMB/CIFS implementation.
+   SMB torture tester
+   Copyright (C) Andrew Tridgell 2003
+   Copyright (C) Jelmer Vernooij 2006
+   
+   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/>.
+*/
+
+#include "includes.h"
+#if (_SAMBA_BUILD_ >= 4)
+#include "lib/cmdline/popt_common.h"
+#include "system/filesys.h"
+#include "system/locale.h"
+#include "librpc/ndr/libndr.h"
+#include "librpc/ndr/ndr_table.h"
+#include "param/param.h"
+#else
+#define _NORETURN_
+#endif
+
+static const struct ndr_interface_call *find_function(
+	const struct ndr_interface_table *p,
+	const char *function)
+{
+	int i;
+	if (isdigit(function[0])) {
+		i = strtol(function, NULL, 0);
+		return &p->calls[i];
+	}
+	for (i=0;i<p->num_calls;i++) {
+		if (strcmp(p->calls[i].name, function) == 0) {
+			break;
+		}
+	}
+	if (i == p->num_calls) {
+		printf("Function '%s' not found\n", function);
+		exit(1);
+	}
+	return &p->calls[i];
+}
+
+#if (_SAMBA_BUILD_ >= 4)
+
+_NORETURN_ static void show_pipes(void)
+{
+	const struct ndr_interface_list *l;
+	printf("\nYou must specify a pipe\n");
+	printf("known pipes are:\n");
+	for (l=ndr_table_list();l;l=l->next) {
+		if(l->table->helpstring) {
+			printf("\t%s - %s\n", l->table->name, l->table->helpstring);
+		} else {
+			printf("\t%s\n", l->table->name);
+		}
+	}
+	exit(1);
+}
+
+#endif
+
+_NORETURN_ static void show_functions(const struct ndr_interface_table *p)
+{
+	int i;
+	printf("\nYou must specify a function\n");
+	printf("known functions on '%s' are:\n", p->name);
+	for (i=0;i<p->num_calls;i++) {
+		printf("\t0x%02x (%2d) %s\n", i, i, p->calls[i].name);
+	}
+	exit(1);
+}
+
+static char *stdin_load(TALLOC_CTX *mem_ctx, size_t *size)
+{
+	int num_read, total_len = 0;
+	char buf[255];
+	char *result = NULL;
+
+	while((num_read = read(STDIN_FILENO, buf, 255)) > 0) {
+
+		if (result) {
+			result = talloc_realloc(
+				mem_ctx, result, char, total_len + num_read);
+		} else {
+			result = talloc_array(mem_ctx, char, num_read);
+		}
+
+		memcpy(result + total_len, buf, num_read);
+
+		total_len += num_read;
+	}
+
+	if (size)
+		*size = total_len;
+
+	return result;
+}
+
+static const struct ndr_interface_table *load_iface_from_plugin(const char *plugin, const char *pipe_name)
+{
+	const struct ndr_interface_table *p;
+	void *handle;
+	char *symbol;
+
+	handle = dlopen(plugin, RTLD_NOW);
+	if (handle == NULL) {
+		printf("%s: Unable to open: %s\n", plugin, dlerror());
+		return NULL;
+	}
+
+	symbol = talloc_asprintf(NULL, "ndr_table_%s", pipe_name);
+	p = (const struct ndr_interface_table *)dlsym(handle, symbol);
+
+	if (!p) {
+		printf("%s: Unable to find DCE/RPC interface table for '%s': %s\n", plugin, pipe_name, dlerror());
+		talloc_free(symbol);
+		return NULL;
+	}
+
+	talloc_free(symbol);
+	
+	return p;
+}
+
+static void ndrdump_data(uint8_t *d, uint32_t l, bool force)
+{
+	if (force) {
+		dump_data(0, d, l);
+	} else {
+		dump_data_skip_zeros(0, d, l);
+	}
+}
+
+ int main(int argc, const char *argv[])
+{
+	const struct ndr_interface_table *p = NULL;
+	const struct ndr_interface_call *f;
+	const char *pipe_name, *function, *inout, *filename;
+	uint8_t *data;
+	size_t size;
+	DATA_BLOB blob;
+	struct ndr_pull *ndr_pull;
+	struct ndr_print *ndr_print;
+	TALLOC_CTX *mem_ctx;
+	int flags;
+	poptContext pc;
+	NTSTATUS status;
+	enum ndr_err_code ndr_err;
+	void *st;
+	void *v_st;
+	const char *ctx_filename = NULL;
+	const char *plugin = NULL;
+	bool validate = false;
+	bool dumpdata = false;
+	int opt;
+	enum {OPT_CONTEXT_FILE=1000, OPT_VALIDATE, OPT_DUMP_DATA, OPT_LOAD_DSO};
+	struct poptOption long_options[] = {
+		POPT_AUTOHELP
+		{"context-file", 'c', POPT_ARG_STRING, NULL, OPT_CONTEXT_FILE, "In-filename to parse first", "CTX-FILE" },
+		{"validate", 0, POPT_ARG_NONE, NULL, OPT_VALIDATE, "try to validate the data", NULL },	
+		{"dump-data", 0, POPT_ARG_NONE, NULL, OPT_DUMP_DATA, "dump the hex data", NULL },	
+		{"load-dso", 'l', POPT_ARG_STRING, NULL, OPT_LOAD_DSO, "load from shared object file", NULL },
+		POPT_COMMON_SAMBA
+		POPT_COMMON_VERSION
+		{ NULL }
+	};
+
+#if (_SAMBA_BUILD_ >= 4)
+	ndr_table_init();
+#else
+	/* Initialise samba stuff */
+	load_case_tables();
+
+	setlinebuf(stdout);
+
+	dbf = x_stderr;
+
+	setup_logging(argv[0],True);
+#endif
+
+	pc = poptGetContext("ndrdump", argc, argv, long_options, 0);
+	
+	poptSetOtherOptionHelp(
+		pc, "<pipe|uuid> <function> <inout> [<filename>]");
+
+	while ((opt = poptGetNextOpt(pc)) != -1) {
+		switch (opt) {
+		case OPT_CONTEXT_FILE:
+			ctx_filename = poptGetOptArg(pc);
+			break;
+		case OPT_VALIDATE:
+			validate = true;
+			break;
+		case OPT_DUMP_DATA:
+			dumpdata = true;
+			break;
+		case OPT_LOAD_DSO:
+			plugin = poptGetOptArg(pc);
+			break;
+		}
+	}
+
+	pipe_name = poptGetArg(pc);
+
+	if (!pipe_name) {
+		poptPrintUsage(pc, stderr, 0);
+#if (_SAMBA_BUILD_ >= 4)
+		show_pipes();
+#endif
+		exit(1);
+	}
+
+	if (plugin != NULL) {
+		p = load_iface_from_plugin(plugin, pipe_name);
+	} 
+#if (_SAMBA_BUILD_ <= 3)
+	else {
+		fprintf(stderr, "Only loading from DSO's supported in Samba 3\n");
+		exit(1);
+	}
+#else
+	if (!p) {
+		p = ndr_table_by_name(pipe_name);
+	}
+
+	if (!p) {
+		struct GUID uuid;
+
+		status = GUID_from_string(pipe_name, &uuid);
+
+		if (NT_STATUS_IS_OK(status)) {
+			p = ndr_table_by_uuid(&uuid);
+		}
+	}
+#endif
+
+	if (!p) {
+		printf("Unknown pipe or UUID '%s'\n", pipe_name);
+		exit(1);
+	}
+
+	function = poptGetArg(pc);
+	inout = poptGetArg(pc);
+	filename = poptGetArg(pc);
+
+	if (!function || !inout) {
+		poptPrintUsage(pc, stderr, 0);
+		show_functions(p);
+		exit(1);
+	}
+
+	if (strcmp(inout, "in") == 0 ||
+	    strcmp(inout, "request") == 0) {
+		flags = NDR_IN;
+	} else if (strcmp(inout, "out") == 0 ||
+		   strcmp(inout, "response") == 0) {
+		flags = NDR_OUT;
+	} else {
+		printf("Bad inout value '%s'\n", inout);
+		exit(1);
+	}
+
+	f = find_function(p, function);
+
+	mem_ctx = talloc_init("ndrdump");
+
+	st = talloc_zero_size(mem_ctx, f->struct_size);
+	if (!st) {
+		printf("Unable to allocate %d bytes\n", (int)f->struct_size);
+		exit(1);
+	}
+
+	v_st = talloc_zero_size(mem_ctx, f->struct_size);
+	if (!v_st) {
+		printf("Unable to allocate %d bytes\n", (int)f->struct_size);
+		exit(1);
+	}
+
+	if (ctx_filename) {
+		if (flags == NDR_IN) {
+			printf("Context file can only be used for \"out\" packages\n");
+			exit(1);
+		}
+			
+		data = (uint8_t *)file_load(ctx_filename, &size, 0, mem_ctx);
+		if (!data) {
+			perror(ctx_filename);
+			exit(1);
+		}
+
+		blob.data = data;
+		blob.length = size;
+
+		ndr_pull = ndr_pull_init_blob(&blob, mem_ctx, lp_iconv_convenience(cmdline_lp_ctx));
+		ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
+
+		ndr_err = f->ndr_pull(ndr_pull, NDR_IN, st);
+
+		if (ndr_pull->offset != ndr_pull->data_size) {
+			printf("WARNING! %d unread bytes while parsing context file\n", ndr_pull->data_size - ndr_pull->offset);
+		}
+
+		if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+			status = ndr_map_error2ntstatus(ndr_err);
+			printf("pull for context file returned %s\n", nt_errstr(status));
+			exit(1);
+		}
+		memcpy(v_st, st, f->struct_size);
+	} 
+
+	if (filename)
+		data = (uint8_t *)file_load(filename, &size, 0, mem_ctx);
+	else
+		data = (uint8_t *)stdin_load(mem_ctx, &size);
+
+	if (!data) {
+		if (filename)
+			perror(filename);
+		else
+			perror("stdin");
+		exit(1);
+	}
+
+	blob.data = data;
+	blob.length = size;
+
+	ndr_pull = ndr_pull_init_blob(&blob, mem_ctx, lp_iconv_convenience(cmdline_lp_ctx));
+	ndr_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
+
+	ndr_err = f->ndr_pull(ndr_pull, flags, st);
+	status = ndr_map_error2ntstatus(ndr_err);
+
+	printf("pull returned %s\n", nt_errstr(status));
+
+	if (ndr_pull->offset != ndr_pull->data_size) {
+		printf("WARNING! %d unread bytes\n", ndr_pull->data_size - ndr_pull->offset);
+		ndrdump_data(ndr_pull->data+ndr_pull->offset,
+			     ndr_pull->data_size - ndr_pull->offset,
+			     dumpdata);
+	}
+
+	if (dumpdata) {
+		printf("%d bytes consumed\n", ndr_pull->offset);
+		ndrdump_data(blob.data, blob.length, dumpdata);
+	}
+
+	ndr_print = talloc_zero(mem_ctx, struct ndr_print);
+	ndr_print->print = ndr_print_debug_helper;
+	ndr_print->depth = 1;
+	f->ndr_print(ndr_print, function, flags, st);
+
+	if (!NT_STATUS_IS_OK(status)) {
+		printf("dump FAILED\n");
+		exit(1);
+	}
+
+	if (validate) {
+		DATA_BLOB v_blob;
+		struct ndr_push *ndr_v_push;
+		struct ndr_pull *ndr_v_pull;
+		struct ndr_print *ndr_v_print;
+		uint32_t i;
+		uint8_t byte_a, byte_b;
+		bool differ;
+
+		ndr_v_push = ndr_push_init_ctx(mem_ctx, lp_iconv_convenience(cmdline_lp_ctx));
+		
+		ndr_err = f->ndr_push(ndr_v_push, flags, st);
+		status = ndr_map_error2ntstatus(ndr_err);
+		printf("push returned %s\n", nt_errstr(status));
+		if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+			printf("validate push FAILED\n");
+			exit(1);
+		}
+
+		v_blob = ndr_push_blob(ndr_v_push);
+
+		if (dumpdata) {
+			printf("%ld bytes generated (validate)\n", (long)v_blob.length);
+			ndrdump_data(v_blob.data, v_blob.length, dumpdata);
+		}
+
+		ndr_v_pull = ndr_pull_init_blob(&v_blob, mem_ctx, lp_iconv_convenience(cmdline_lp_ctx));
+		ndr_v_pull->flags |= LIBNDR_FLAG_REF_ALLOC;
+
+		ndr_err = f->ndr_pull(ndr_v_pull, flags, v_st);
+		status = ndr_map_error2ntstatus(ndr_err);
+		printf("pull returned %s\n", nt_errstr(status));
+		if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+			printf("validate pull FAILED\n");
+			exit(1);
+		}
+
+
+		if (ndr_v_pull->offset != ndr_v_pull->data_size) {
+			printf("WARNING! %d unread bytes in validation\n", ndr_v_pull->data_size - ndr_v_pull->offset);
+			ndrdump_data(ndr_v_pull->data+ndr_v_pull->offset,
+				     ndr_v_pull->data_size - ndr_v_pull->offset,
+				     dumpdata);
+		}
+
+		ndr_v_print = talloc_zero(mem_ctx, struct ndr_print);
+		ndr_v_print->print = ndr_print_debug_helper;
+		ndr_v_print->depth = 1;
+		f->ndr_print(ndr_v_print, function, flags, v_st);
+
+		if (blob.length != v_blob.length) {
+			printf("WARNING! orig bytes:%llu validated pushed bytes:%llu\n", 
+			       (unsigned long long)blob.length, (unsigned long long)v_blob.length);
+		}
+
+		if (ndr_pull->offset != ndr_v_pull->offset) {
+			printf("WARNING! orig pulled bytes:%llu validated pulled bytes:%llu\n", 
+			       (unsigned long long)ndr_pull->offset, (unsigned long long)ndr_v_pull->offset);
+		}
+
+		differ = false;
+		byte_a = 0x00;
+		byte_b = 0x00;
+		for (i=0; i < blob.length; i++) {
+			byte_a = blob.data[i];
+
+			if (i == v_blob.length) {
+				byte_b = 0x00;
+				differ = true;
+				break;
+			}
+
+			byte_b = v_blob.data[i];
+
+			if (byte_a != byte_b) {
+				differ = true;
+				break;
+			}
+		}
+		if (differ) {
+			printf("WARNING! orig and validated differ at byte 0x%02X (%u)\n", i, i);
+			printf("WARNING! orig byte[0x%02X] = 0x%02X validated byte[0x%02X] = 0x%02X\n",
+				i, byte_a, i, byte_b);
+		}
+	}
+
+	printf("dump OK\n");
+
+	talloc_free(mem_ctx);
+
+	poptFreeContext(pc);
+	
+	return 0;
+}