Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

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

1 files changed, 437 insertions, 0 deletions

diff --git a/librpc/ndr/ndr_cab.c b/librpc/ndr/ndr_cab.c
new file mode 100644
index 0000000..476e21c
--- /dev/null
+++ b/librpc/ndr/ndr_cab.c
@@ -0,0 +1,437 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   routines for marshalling/unmarshalling cab structures
+
+   Copyright (C) Guenther Deschner 2016
+
+   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"
+#include "librpc/gen_ndr/ndr_cab.h"
+#include "librpc/ndr/ndr_compression.h"
+
+#define OFFSET_OF_FOLDER_COFFCABSTART(folder) (36 /* cfheader size */ + (size_t)(folder)*8)
+
+_PUBLIC_ void ndr_print_cf_time(struct ndr_print *ndr, const char *name, const struct cf_time *r)
+{
+	uint8_t hour = 0, minute = 0, seconds = 0;
+	char *s;
+	if (r == NULL) { ndr_print_null(ndr); return; }
+	hour = r->time >> 11;
+	minute = (r->time >> 5) & 0x3f;
+	seconds = (r->time << 1) & 0x3e;
+	s = talloc_asprintf(ndr, "%02d:%02d:%02d", hour, minute, seconds);
+	if (s == NULL) { return; }
+	ndr_print_string(ndr, "time", s);
+	talloc_free(s);
+}
+
+_PUBLIC_ void ndr_print_cf_date(struct ndr_print *ndr, const char *name, const struct cf_date *r)
+{
+	uint16_t year = 0;
+	uint8_t month = 0, day = 0;
+	char *s;
+	if (r == NULL) { ndr_print_null(ndr); return; }
+	year = (r->date >> 9);
+	year += 1980;
+	month = (r->date >> 5 & 0xf);
+	day = (r->date & 0x1f);
+	s = talloc_asprintf(ndr, "%02d/%02d/%04d", day, month, year);
+	if (s == NULL) { return; }
+	ndr_print_string(ndr, "date", s);
+	talloc_free(s);
+}
+
+uint32_t ndr_count_cfdata(const struct cab_file *r)
+{
+	uint32_t count = 0, i;
+
+	for (i = 0; i < r->cfheader.cFolders; i++) {
+		if (count + r->cffolders[i].cCFData < count) {
+			/* Integer wrap. */
+			return 0;
+		}
+		count += r->cffolders[i].cCFData;
+	}
+
+	return count;
+}
+
+static uint32_t ndr_cab_compute_checksum(uint8_t *data, uint32_t length, uint32_t seed)
+{
+	int num_ulong;
+	uint32_t checksum;
+	uint8_t *pb;
+	uint32_t ul;
+
+	num_ulong = length / 4;
+	checksum = seed;
+	pb = data;
+
+	while (num_ulong-- > 0) {
+		ul = (uint32_t)(*pb++);
+		ul |= (((uint32_t)(*pb++)) <<  8);
+		ul |= (((uint32_t)(*pb++)) << 16);
+		ul |= (((uint32_t)(*pb++)) << 24);
+
+		checksum ^= ul;
+	}
+
+	ul = 0;
+
+	switch (length % 4) {
+	case 3:
+		ul |= (((uint32_t)(*pb++)) << 16);
+		FALL_THROUGH;
+	case 2:
+		ul |= (((uint32_t)(*pb++)) <<  8);
+		FALL_THROUGH;
+	case 1:
+		ul |= (uint32_t)(*pb++);
+		FALL_THROUGH;
+	default:
+		break;
+	}
+
+	checksum ^= ul;
+
+	return checksum;
+}
+
+/* Push all CFDATA of a folder.
+ *
+ * This works on a folder level because compression type is set per
+ * folder, and a compression state can be shared between CFDATA of the
+ * same folder.
+ *
+ * This is not a regular NDR func as we pass the compression type and
+ * the number of CFDATA as extra arguments
+ */
+static enum ndr_err_code ndr_push_folder_cfdata(struct ndr_push *ndr,
+						const struct CFDATA *r,
+						enum cf_compress_type cab_ctype,
+						size_t num_cfdata)
+{
+	size_t i;
+	enum ndr_compression_alg ndr_ctype = 0;
+
+	ndr_set_flags(&ndr->flags, LIBNDR_PRINT_ARRAY_HEX|LIBNDR_FLAG_LITTLE_ENDIAN|LIBNDR_FLAG_NOALIGN);
+
+	if (cab_ctype == CF_COMPRESS_MSZIP) {
+		ndr_ctype = NDR_COMPRESSION_MSZIP_CAB;
+		NDR_CHECK(ndr_push_compression_state_init(ndr, ndr_ctype, &ndr->cstate));
+	}
+
+	for (i = 0; i < num_cfdata; i++, r++) {
+		uint32_t compressed_length = 0;
+		uint32_t csum, csumPartial;
+		size_t compressed_offset, csum_offset, data_offset;
+
+		if (!r->ab.data) {
+			return ndr_push_error(ndr, NDR_ERR_LENGTH,
+					      "NULL uncompressed data blob");
+		}
+		if (r->ab.length != r->cbUncomp) {
+			return ndr_push_error(ndr, NDR_ERR_LENGTH,
+					      "Uncompressed data blob size != uncompressed data size field");
+		}
+
+		/*
+		 * checksum is a function of the size fields
+		 * and the potentially compressed data bytes,
+		 * which haven't been compressed yet so
+		 * remember offset, write zeroes, fill out
+		 * later
+		 */
+		csum_offset = ndr->offset;
+		NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
+
+		/*
+		 * similarly, we don't know the compressed
+		 * size yet, remember offset, write zeros,
+		 * fill out later
+		 */
+		compressed_offset = ndr->offset;
+		NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 0));
+		NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, r->cbUncomp));
+
+		data_offset = ndr->offset;
+
+		switch (cab_ctype) {
+		case CF_COMPRESS_NONE:
+			/* just copy the data */
+			NDR_PUSH_NEED_BYTES(ndr, r->ab.length);
+			NDR_CHECK(ndr_push_bytes(ndr, r->ab.data, r->ab.length));
+			compressed_length = r->ab.length;
+			break;
+		case CF_COMPRESS_LZX:
+			/*
+			 * we have not yet worked out the details of LZX
+			 * compression
+			 */
+			return NDR_ERR_COMPRESSION;
+
+		case CF_COMPRESS_MSZIP: {
+			struct ndr_push *push_sub, *push_compress;
+
+			/* compress via subcontext */
+			NDR_CHECK(ndr_push_subcontext_start(ndr, &push_sub, 0, -1));
+			push_sub->cstate = ndr->cstate;
+			NDR_CHECK(ndr_push_compression_start(push_sub, &push_compress, ndr_ctype, -1));
+			ndr_set_flags(&push_compress->flags, LIBNDR_FLAG_REMAINING);
+			NDR_CHECK(ndr_push_DATA_BLOB(push_compress, NDR_SCALARS, r->ab));
+			NDR_CHECK(ndr_push_compression_end(push_sub, push_compress, ndr_ctype, -1));
+			NDR_CHECK(ndr_push_subcontext_end(ndr, push_sub, 0, -1));
+			compressed_length = push_sub->offset;
+
+			break;
+			}
+		default:
+			return NDR_ERR_BAD_SWITCH;
+		}
+
+		/* we can now write the compressed size and the checksum */
+		SSVAL(ndr->data, compressed_offset, compressed_length);
+
+		/*
+		 * Create checksum over compressed data.
+		 *
+		 * The 8 bytes are the header size.
+		 *
+		 * We have already have written the checksum and set it to zero,
+		 * earlier. So we know that after the checksum end the value
+		 * for the compressed length comes the blob data.
+		 *
+		 * NDR already did all the checks for integer wraps.
+		 */
+		csumPartial = ndr_cab_compute_checksum(&ndr->data[data_offset],
+						       compressed_length, 0);
+
+		/*
+		 * Checksum over header (compressed and uncompressed length).
+		 *
+		 * The first 4 bytes are the checksum size.
+		 * The second 4 bytes are the size of the compressed and
+		 * uncompressed length fields.
+		 *
+		 * NDR already did all the checks for integer wraps.
+		 */
+		csum = ndr_cab_compute_checksum(&ndr->data[compressed_offset],
+						data_offset - compressed_offset,
+						csumPartial);
+
+		SIVAL(ndr->data, csum_offset, csum);
+	}
+
+	ndr_push_compression_state_free(ndr->cstate);
+	ndr->cstate = NULL;
+
+	return NDR_ERR_SUCCESS;
+}
+
+_PUBLIC_ enum ndr_err_code ndr_push_cab_file(struct ndr_push *ndr, int ndr_flags, const struct cab_file *r)
+{
+	uint32_t cntr_cffolders_0;
+	uint32_t cntr_cffiles_0;
+	size_t processed_cfdata = 0;
+	{
+		uint32_t _flags_save_STRUCT = ndr->flags;
+		ndr_set_flags(&ndr->flags, LIBNDR_PRINT_ARRAY_HEX|LIBNDR_FLAG_LITTLE_ENDIAN|LIBNDR_FLAG_NOALIGN);
+		NDR_PUSH_CHECK_FLAGS(ndr, ndr_flags);
+
+		if (ndr_flags & NDR_SCALARS) {
+			uint32_t i;
+			NDR_CHECK(ndr_push_align(ndr, 4));
+			NDR_CHECK(ndr_push_CFHEADER(ndr, NDR_SCALARS, &r->cfheader));
+			for (cntr_cffolders_0 = 0; cntr_cffolders_0 < (r->cfheader.cFolders); cntr_cffolders_0++) {
+				NDR_CHECK(ndr_push_CFFOLDER(ndr, NDR_SCALARS, &r->cffolders[cntr_cffolders_0]));
+			}
+			for (cntr_cffiles_0 = 0; cntr_cffiles_0 < (r->cfheader.cFiles); cntr_cffiles_0++) {
+				NDR_CHECK(ndr_push_CFFILE(ndr, NDR_SCALARS, &r->cffiles[cntr_cffiles_0]));
+			}
+#if 0
+			NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, ndr_count_cfdata(r)));
+#endif
+
+			/* write in the folder header the offset of its first data block */
+			for (i = 0; i < r->cfheader.cFolders; i++) {
+				size_t off = OFFSET_OF_FOLDER_COFFCABSTART(i);
+				/* check that the offset we want to
+				 * write to is always inside our
+				 * current push buffer
+				 */
+				if (off >= ndr->offset) {
+					return ndr_push_error(ndr, NDR_ERR_OFFSET,
+							      "trying to write past current push buffer size");
+				}
+				SIVAL(ndr->data, off, ndr->offset);
+				NDR_CHECK(ndr_push_folder_cfdata(ndr, r->cfdata + processed_cfdata, r->cffolders[i].typeCompress, r->cffolders[i].cCFData));
+				processed_cfdata += r->cffolders[i].cCFData;
+			}
+			NDR_CHECK(ndr_push_trailer_align(ndr, 4));
+		}
+		if (ndr_flags & NDR_BUFFERS) {
+		}
+		ndr->flags = _flags_save_STRUCT;
+	}
+
+
+	/* write total file size in header */
+	SIVAL(ndr->data, 8, ndr->offset);
+
+	return NDR_ERR_SUCCESS;
+}
+
+
+/* Pull all CFDATA of a folder.
+ *
+ * This works on a folder level because compression type is set per
+ * folder, and a compression state can be shared between CFDATA of the
+ * same folder.
+ *
+ * This is not a regular NDR func as we pass the compression type and
+ * the number of CFDATA as extra arguments
+ */
+static enum ndr_err_code ndr_pull_folder_cfdata(struct ndr_pull *ndr,
+						struct CFDATA *r,
+						enum cf_compress_type cab_ctype,
+						size_t num_cfdata)
+{
+	size_t i;
+	enum ndr_compression_alg ndr_ctype = 0;
+
+	if (cab_ctype == CF_COMPRESS_MSZIP) {
+		ndr_ctype = NDR_COMPRESSION_MSZIP_CAB;
+		NDR_CHECK(ndr_pull_compression_state_init(ndr, NDR_COMPRESSION_MSZIP_CAB, &ndr->cstate));
+	}
+
+	for (i = 0; i < num_cfdata; i++, r++) {
+		NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->csum));
+		NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &r->cbData));
+		NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &r->cbUncomp));
+
+		switch (cab_ctype) {
+		case CF_COMPRESS_NONE:
+			/* just copy the data */
+			NDR_PULL_NEED_BYTES(ndr, r->cbUncomp);
+			r->ab = data_blob_talloc(ndr->current_mem_ctx,
+						 ndr->data+ndr->offset,
+						 r->cbUncomp);
+			if (r->ab.data == NULL) {
+				return ndr_pull_error(ndr, NDR_ERR_ALLOC,
+						      "failed to allocate buffer for uncompressed CFDATA block");
+			}
+			ndr->offset += r->cbUncomp;
+			break;
+
+		case CF_COMPRESS_LZX:
+			/* just copy the data (LZX decompression not implemented yet) */
+			NDR_PULL_NEED_BYTES(ndr, r->cbData);
+			r->ab = data_blob_talloc(ndr->current_mem_ctx,
+						 ndr->data+ndr->offset,
+						 r->cbData);
+			if (r->ab.data == NULL) {
+				return ndr_pull_error(ndr, NDR_ERR_ALLOC,
+						      "failed to allocate buffer for LZX-compressed CFDATA block");
+			}
+			ndr->offset += r->cbData;
+			break;
+
+		case CF_COMPRESS_MSZIP: {
+			struct ndr_pull *pull_sub, *pull_compress;
+			NDR_PULL_NEED_BYTES(ndr, r->cbData);
+			/* decompress via subcontext */
+			NDR_CHECK(ndr_pull_subcontext_start(ndr, &pull_sub, 0, r->cbData));
+			pull_sub->cstate = ndr->cstate;
+			NDR_CHECK(ndr_pull_compression_start(pull_sub, &pull_compress,
+							     ndr_ctype, r->cbUncomp, r->cbData));
+			ndr_set_flags(&pull_compress->flags, LIBNDR_FLAG_REMAINING);
+			NDR_CHECK(ndr_pull_DATA_BLOB(pull_compress, NDR_SCALARS, &r->ab));
+			NDR_CHECK(ndr_pull_compression_end(pull_sub, pull_compress, ndr_ctype, r->cbUncomp));
+			NDR_CHECK(ndr_pull_subcontext_end(ndr, pull_sub, 0, r->cbData));
+
+			break;
+		}
+		default:
+			return NDR_ERR_BAD_SWITCH;
+		}
+	}
+
+	ndr_pull_compression_state_free(ndr->cstate);
+	ndr->cstate = NULL;
+
+	return NDR_ERR_SUCCESS;
+}
+
+_PUBLIC_ enum ndr_err_code ndr_pull_cab_file(struct ndr_pull *ndr, int ndr_flags, struct cab_file *r)
+{
+	uint32_t size_cffolders_0 = 0;
+	uint32_t cntr_cffolders_0;
+	TALLOC_CTX *_mem_save_cffolders_0 = NULL;
+	uint32_t size_cffiles_0 = 0;
+	uint32_t cntr_cffiles_0;
+	TALLOC_CTX *_mem_save_cffiles_0 = NULL;
+	uint32_t size_cfdata_0 = 0;
+	size_t processed_cfdata = 0;
+	TALLOC_CTX *_mem_save_cfdata_0 = NULL;
+	{
+		uint32_t _flags_save_STRUCT = ndr->flags;
+		ndr_set_flags(&ndr->flags, LIBNDR_PRINT_ARRAY_HEX|LIBNDR_FLAG_LITTLE_ENDIAN|LIBNDR_FLAG_NOALIGN);
+		NDR_PULL_CHECK_FLAGS(ndr, ndr_flags);
+		if (ndr_flags & NDR_SCALARS) {
+			NDR_CHECK(ndr_pull_align(ndr, 4));
+			NDR_CHECK(ndr_pull_CFHEADER(ndr, NDR_SCALARS, &r->cfheader));
+			size_cffolders_0 = r->cfheader.cFolders;
+			NDR_PULL_ALLOC_N(ndr, r->cffolders, size_cffolders_0);
+			_mem_save_cffolders_0 = NDR_PULL_GET_MEM_CTX(ndr);
+			NDR_PULL_SET_MEM_CTX(ndr, r->cffolders, 0);
+			for (cntr_cffolders_0 = 0; cntr_cffolders_0 < (size_cffolders_0); cntr_cffolders_0++) {
+				NDR_CHECK(ndr_pull_CFFOLDER(ndr, NDR_SCALARS, &r->cffolders[cntr_cffolders_0]));
+			}
+			NDR_PULL_SET_MEM_CTX(ndr, _mem_save_cffolders_0, 0);
+			size_cffiles_0 = r->cfheader.cFiles;
+			NDR_PULL_ALLOC_N(ndr, r->cffiles, size_cffiles_0);
+			_mem_save_cffiles_0 = NDR_PULL_GET_MEM_CTX(ndr);
+			NDR_PULL_SET_MEM_CTX(ndr, r->cffiles, 0);
+			for (cntr_cffiles_0 = 0; cntr_cffiles_0 < (size_cffiles_0); cntr_cffiles_0++) {
+				NDR_CHECK(ndr_pull_CFFILE(ndr, NDR_SCALARS, &r->cffiles[cntr_cffiles_0]));
+			}
+			NDR_PULL_SET_MEM_CTX(ndr, _mem_save_cffiles_0, 0);
+#if 0
+			NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->cfdata_count));
+#else
+			r->cfdata_count = ndr_count_cfdata(r);
+#endif
+			size_cfdata_0 = r->cfdata_count;
+			NDR_PULL_ALLOC_N(ndr, r->cfdata, size_cfdata_0);
+			_mem_save_cfdata_0 = NDR_PULL_GET_MEM_CTX(ndr);
+			NDR_PULL_SET_MEM_CTX(ndr, r->cfdata, 0);
+			for (cntr_cffolders_0 = 0; cntr_cffolders_0 < (size_cffolders_0); cntr_cffolders_0++) {
+				NDR_CHECK(ndr_pull_folder_cfdata(ndr,
+								 r->cfdata + processed_cfdata,
+								 r->cffolders[cntr_cffolders_0].typeCompress,
+								 r->cffolders[cntr_cffolders_0].cCFData));
+				processed_cfdata += r->cffolders[cntr_cffolders_0].cCFData;
+			}
+			NDR_PULL_SET_MEM_CTX(ndr, _mem_save_cfdata_0, 0);
+			NDR_CHECK(ndr_pull_trailer_align(ndr, 4));
+		}
+		if (ndr_flags & NDR_BUFFERS) {
+		}
+		ndr->flags = _flags_save_STRUCT;
+	}
+	return NDR_ERR_SUCCESS;
+}