summaryrefslogtreecommitdiff
path: root/source4/librpc
diff options
context:
space:
mode:
Diffstat (limited to 'source4/librpc')
-rw-r--r--source4/librpc/config.mk3
-rw-r--r--source4/librpc/ndr/ndr_compression.c153
2 files changed, 139 insertions, 17 deletions
diff --git a/source4/librpc/config.mk b/source4/librpc/config.mk
index d87683dd6f..09be67d5aa 100644
--- a/source4/librpc/config.mk
+++ b/source4/librpc/config.mk
@@ -43,7 +43,8 @@ MANPAGES += $(librpcsrcdir)/tools/ndrdump.1
################################################
# Start SUBSYSTEM NDR_COMPRESSION
[SUBSYSTEM::NDR_COMPRESSION]
-PUBLIC_DEPENDENCIES = LIBCOMPRESSION LIBSAMBA-ERRORS LIBNDR
+PRIVATE_DEPENDENCIES = ZLIB LZXPRESS
+PUBLIC_DEPENDENCIES = LIBSAMBA-ERRORS LIBNDR
# End SUBSYSTEM NDR_COMPRESSION
################################################
diff --git a/source4/librpc/ndr/ndr_compression.c b/source4/librpc/ndr/ndr_compression.c
index 86a5a2560e..7c2aca72e9 100644
--- a/source4/librpc/ndr/ndr_compression.c
+++ b/source4/librpc/ndr/ndr_compression.c
@@ -4,6 +4,7 @@
libndr compression support
Copyright (C) Stefan Metzmacher 2005
+ Copyright (C) Matthieu Suiche 2008
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
@@ -20,13 +21,24 @@
*/
#include "includes.h"
-#include "lib/compression/mszip.h"
+#include "lib/compression/lzxpress.h"
#include "librpc/ndr/libndr.h"
#include "librpc/ndr/ndr_compression.h"
+#include <zlib.h>
+
+static voidpf ndr_zlib_alloc(voidpf opaque, uInt items, uInt size)
+{
+ return talloc_zero_size(opaque, items * size);
+}
+
+static void ndr_zlib_free(voidpf opaque, voidpf address)
+{
+ talloc_free(address);
+}
static enum ndr_err_code ndr_pull_compression_mszip_chunk(struct ndr_pull *ndrpull,
struct ndr_push *ndrpush,
- struct decomp_state *decomp_state,
+ z_stream *z,
bool *last)
{
DATA_BLOB comp_chunk;
@@ -35,7 +47,7 @@ static enum ndr_err_code ndr_pull_compression_mszip_chunk(struct ndr_pull *ndrpu
DATA_BLOB plain_chunk;
uint32_t plain_chunk_offset;
uint32_t plain_chunk_size;
- int ret;
+ int z_ret;
NDR_CHECK(ndr_pull_uint32(ndrpull, NDR_SCALARS, &plain_chunk_size));
if (plain_chunk_size > 0x00008000) {
@@ -58,10 +70,71 @@ static enum ndr_err_code ndr_pull_compression_mszip_chunk(struct ndr_pull *ndrpu
plain_chunk.length = plain_chunk_size;
plain_chunk.data = ndrpush->data + plain_chunk_offset;
- ret = ZIPdecompress(decomp_state, &comp_chunk, &plain_chunk);
- if (ret != DECR_OK) {
- return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION, "Bad ZIPdecompress() error %d (PULL)",
- ret);
+ if (comp_chunk.length < 2) {
+ return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION,
+ "Bad MSZIP comp chunk size %u < 2 (PULL)",
+ (unsigned int)comp_chunk.length);
+ }
+ /* CK = Chris Kirmse, official Microsoft purloiner */
+ if (comp_chunk.data[0] != 'C' ||
+ comp_chunk.data[1] != 'K') {
+ return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION,
+ "Bad MSZIP invalid prefix [%c%c] != [CK]",
+ comp_chunk.data[0], comp_chunk.data[1]);
+ }
+
+ z->next_in = comp_chunk.data + 2;
+ z->avail_in = comp_chunk.length -2;
+ z->total_in = 0;
+
+ z->next_out = plain_chunk.data;
+ z->avail_out = plain_chunk.length;
+ z->total_out = 0;
+
+ if (!z->opaque) {
+ /* the first time we need to intialize completely */
+ z->zalloc = ndr_zlib_alloc;
+ z->zfree = ndr_zlib_free;
+ z->opaque = ndrpull;
+
+ z_ret = inflateInit2(z, -15);
+ if (z_ret != Z_OK) {
+ return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION,
+ "Bad inflateInit2 error %s(%d) (PULL)",
+ zError(z_ret), z_ret);
+
+ }
+ } else {
+ z_ret = inflateReset2(z, Z_RESET_KEEP_WINDOW);
+ if (z_ret != Z_OK) {
+ return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION,
+ "Bad inflateReset2 error %s(%d) (PULL)",
+ zError(z_ret), z_ret);
+ }
+ }
+
+ /* call inflate untill we get Z_STREAM_END or an error */
+ while (true) {
+ z_ret = inflate(z, Z_BLOCK);
+ if (z_ret != Z_OK) break;
+ }
+
+ if (z_ret != Z_STREAM_END) {
+ return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION,
+ "Bad inflate(Z_BLOCK) error %s(%d) (PULL)",
+ zError(z_ret), z_ret);
+ }
+
+ if (z->avail_in) {
+ return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION,
+ "MSZIP not all avail_in[%u] bytes consumed (PULL)",
+ z->avail_in);
+ }
+
+ if (z->avail_out) {
+ return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION,
+ "MSZIP not all avail_out[%u] bytes consumed (PULL)",
+ z->avail_out);
}
if ((plain_chunk_size < 0x00008000) || (ndrpull->offset+4 >= ndrpull->data_size)) {
@@ -83,17 +156,16 @@ static enum ndr_err_code ndr_pull_compression_mszip(struct ndr_pull *subndr,
uint32_t payload_size;
uint32_t payload_offset;
uint8_t *payload;
- struct decomp_state *decomp_state;
+ z_stream z;
bool last = false;
ndrpush = ndr_push_init_ctx(subndr, subndr->iconv_convenience);
NDR_ERR_HAVE_NO_MEMORY(ndrpush);
- decomp_state = ZIPdecomp_state(subndr);
- NDR_ERR_HAVE_NO_MEMORY(decomp_state);
+ ZERO_STRUCT(z);
while (!last) {
- NDR_CHECK(ndr_pull_compression_mszip_chunk(subndr, ndrpush, decomp_state, &last));
+ NDR_CHECK(ndr_pull_compression_mszip_chunk(subndr, ndrpush, &z, &last));
}
uncompressed = ndr_push_blob(ndrpush);
@@ -158,12 +230,12 @@ static enum ndr_err_code ndr_pull_compression_xpress_chunk(struct ndr_pull *ndrp
bool *last)
{
DATA_BLOB comp_chunk;
+ DATA_BLOB plain_chunk;
uint32_t comp_chunk_offset;
+ uint32_t plain_chunk_offset;
uint32_t comp_chunk_size;
uint32_t plain_chunk_size;
- comp_chunk_offset = ndrpull->offset;
-
NDR_CHECK(ndr_pull_uint32(ndrpull, NDR_SCALARS, &plain_chunk_size));
if (plain_chunk_size > 0x00010000) {
return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION, "Bad XPRESS plain chunk size %08X > 0x00010000 (PULL)",
@@ -172,15 +244,21 @@ static enum ndr_err_code ndr_pull_compression_xpress_chunk(struct ndr_pull *ndrp
NDR_CHECK(ndr_pull_uint32(ndrpull, NDR_SCALARS, &comp_chunk_size));
+ comp_chunk_offset = ndrpull->offset;
NDR_CHECK(ndr_pull_advance(ndrpull, comp_chunk_size));
- comp_chunk.length = comp_chunk_size + 8;
+ comp_chunk.length = comp_chunk_size;
comp_chunk.data = ndrpull->data + comp_chunk_offset;
+ plain_chunk_offset = ndrpush->offset;
+ NDR_CHECK(ndr_push_zero(ndrpush, plain_chunk_size));
+ plain_chunk.length = plain_chunk_size;
+ plain_chunk.data = ndrpush->data + plain_chunk_offset;
+
DEBUG(10,("XPRESS plain_chunk_size: %08X (%u) comp_chunk_size: %08X (%u)\n",
plain_chunk_size, plain_chunk_size, comp_chunk_size, comp_chunk_size));
- /* For now, we just copy over the compressed blob */
- NDR_CHECK(ndr_push_bytes(ndrpush, comp_chunk.data, comp_chunk.length));
+ /* Uncompressing the buffer using LZ Xpress algorithm */
+ lzxpress_decompress(&comp_chunk, &plain_chunk);
if ((plain_chunk_size < 0x00010000) || (ndrpull->offset+4 >= ndrpull->data_size)) {
/* this is the last chunk */
@@ -197,6 +275,10 @@ static enum ndr_err_code ndr_pull_compression_xpress(struct ndr_pull *subndr,
struct ndr_push *ndrpush;
struct ndr_pull *comndr;
DATA_BLOB uncompressed;
+ uint32_t payload_header[4];
+ uint32_t payload_size;
+ uint32_t payload_offset;
+ uint8_t *payload;
bool last = false;
ndrpush = ndr_push_init_ctx(subndr, subndr->iconv_convenience);
@@ -207,6 +289,13 @@ static enum ndr_err_code ndr_pull_compression_xpress(struct ndr_pull *subndr,
}
uncompressed = ndr_push_blob(ndrpush);
+ if (uncompressed.length != decompressed_len) {
+ return ndr_pull_error(subndr, NDR_ERR_COMPRESSION,
+ "Bad XPRESS uncompressed_len [%u] != [%u](0x%08X) (PULL)",
+ (int)uncompressed.length,
+ (int)decompressed_len,
+ (int)decompressed_len);
+ }
comndr = talloc_zero(subndr, struct ndr_pull);
NDR_ERR_HAVE_NO_MEMORY(comndr);
@@ -219,6 +308,38 @@ static enum ndr_err_code ndr_pull_compression_xpress(struct ndr_pull *subndr,
comndr->iconv_convenience = talloc_reference(comndr, subndr->iconv_convenience);
+ NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[0]));
+ NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[1]));
+ NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[2]));
+ NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[3]));
+
+ if (payload_header[0] != 0x00081001) {
+ return ndr_pull_error(subndr, NDR_ERR_COMPRESSION,
+ "Bad XPRESS payload_header[0] [0x%08X] != [0x00081001] (PULL)",
+ payload_header[0]);
+ }
+ if (payload_header[1] != 0xCCCCCCCC) {
+ return ndr_pull_error(subndr, NDR_ERR_COMPRESSION,
+ "Bad XPRESS payload_header[1] [0x%08X] != [0xCCCCCCCC] (PULL)",
+ payload_header[1]);
+ }
+
+ payload_size = payload_header[2];
+
+ if (payload_header[3] != 0x00000000) {
+ return ndr_pull_error(subndr, NDR_ERR_COMPRESSION,
+ "Bad XPRESS payload_header[3] [0x%08X] != [0x00000000] (PULL)",
+ payload_header[3]);
+ }
+
+ payload_offset = comndr->offset;
+ NDR_CHECK(ndr_pull_advance(comndr, payload_size));
+ payload = comndr->data + payload_offset;
+
+ comndr->data = payload;
+ comndr->data_size = payload_size;
+ comndr->offset = 0;
+
*_comndr = comndr;
return NDR_ERR_SUCCESS;
}
generated by cgit (git 2.34.1) at 2024-12-24 01:09:44 +0000