VeraCrypt
aboutsummaryrefslogtreecommitdiff
path: root/src/Common/libzip/zip_buffer.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/Common/libzip/zip_buffer.c')
-rw-r--r--src/Common/libzip/zip_buffer.c321
1 files changed, 321 insertions, 0 deletions
diff --git a/src/Common/libzip/zip_buffer.c b/src/Common/libzip/zip_buffer.c
new file mode 100644
index 00000000..43864f9b
--- /dev/null
+++ b/src/Common/libzip/zip_buffer.c
@@ -0,0 +1,321 @@
+/*
+ zip_buffer.c -- bounds checked access to memory buffer
+ Copyright (C) 2014 Dieter Baron and Thomas Klausner
+
+ This file is part of libzip, a library to manipulate ZIP archives.
+ The authors can be contacted at <libzip@nih.at>
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in
+ the documentation and/or other materials provided with the
+ distribution.
+ 3. The names of the authors may not be used to endorse or promote
+ products derived from this software without specific prior
+ written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
+ OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "zipint.h"
+
+zip_uint8_t *
+_zip_buffer_data(zip_buffer_t *buffer)
+{
+ return buffer->data;
+}
+
+
+void
+_zip_buffer_free(zip_buffer_t *buffer)
+{
+ if (buffer == NULL) {
+ return;
+ }
+
+ if (buffer->free_data) {
+ free(buffer->data);
+ }
+
+ free(buffer);
+}
+
+
+bool
+_zip_buffer_eof(zip_buffer_t *buffer)
+{
+ return buffer->ok && buffer->offset == buffer->size;
+}
+
+
+zip_uint8_t *
+_zip_buffer_get(zip_buffer_t *buffer, zip_uint64_t length)
+{
+ zip_uint8_t *data;
+
+ if (!buffer->ok || buffer->offset + length < length || buffer->offset + length > buffer->size) {
+ buffer->ok = false;
+ return NULL;
+ }
+
+ data = buffer->data + buffer->offset;
+ buffer->offset += length;
+ return data;
+}
+
+
+zip_uint16_t
+_zip_buffer_get_16(zip_buffer_t *buffer)
+{
+ zip_uint8_t *data = _zip_buffer_get(buffer, 2);
+
+ if (data == NULL) {
+ return 0;
+ }
+
+ return (zip_uint16_t)(data[0] + (data[1] << 8));
+}
+
+
+zip_uint32_t
+_zip_buffer_get_32(zip_buffer_t *buffer)
+{
+ zip_uint8_t *data = _zip_buffer_get(buffer, 4);
+
+ if (data == NULL) {
+ return 0;
+ }
+
+ return ((((((zip_uint32_t)data[3] << 8) + data[2]) << 8) + data[1]) << 8) + data[0];
+}
+
+
+zip_uint64_t
+_zip_buffer_get_64(zip_buffer_t *buffer)
+{
+ zip_uint8_t *data = _zip_buffer_get(buffer, 8);
+
+ if (data == NULL) {
+ return 0;
+ }
+
+ return ((zip_uint64_t)data[7] << 56) + ((zip_uint64_t)data[6] << 48) + ((zip_uint64_t)data[5] << 40) + ((zip_uint64_t)data[4] << 32) + ((zip_uint64_t)data[3] << 24) + ((zip_uint64_t)data[2] << 16) + ((zip_uint64_t)data[1] << 8) + (zip_uint64_t)data[0];
+}
+
+
+
+zip_uint8_t
+_zip_buffer_get_8(zip_buffer_t *buffer)
+{
+ zip_uint8_t *data = _zip_buffer_get(buffer, 1);
+
+ if (data == NULL) {
+ return 0;
+ }
+
+ return data[0];
+}
+
+
+zip_uint64_t
+_zip_buffer_left(zip_buffer_t *buffer)
+{
+ return buffer->ok ? buffer->size - buffer->offset : 0;
+}
+
+
+zip_buffer_t *
+_zip_buffer_new(zip_uint8_t *data, zip_uint64_t size)
+{
+ bool free_data = (data == NULL);
+ zip_buffer_t *buffer;
+
+ if (data == NULL) {
+ if ((data = (zip_uint8_t *)malloc(size)) == NULL) {
+ return NULL;
+ }
+ }
+
+ if ((buffer = (zip_buffer_t *)malloc(sizeof(*buffer))) == NULL) {
+ if (free_data) {
+ free(data);
+ }
+ return NULL;
+ }
+
+ buffer->ok = true;
+ buffer->data = data;
+ buffer->size = size;
+ buffer->offset = 0;
+ buffer->free_data = free_data;
+
+ return buffer;
+}
+
+
+zip_buffer_t *
+_zip_buffer_new_from_source(zip_source_t *src, zip_uint64_t size, zip_uint8_t *buf, zip_error_t *error)
+{
+ zip_buffer_t *buffer;
+
+ if ((buffer = _zip_buffer_new(buf, size)) == NULL) {
+ zip_error_set(error, ZIP_ER_MEMORY, 0);
+ return NULL;
+ }
+
+ if (_zip_read(src, buffer->data, size, error) < 0) {
+ _zip_buffer_free(buffer);
+ return NULL;
+ }
+
+ return buffer;
+}
+
+
+zip_uint64_t
+_zip_buffer_offset(zip_buffer_t *buffer)
+{
+ return buffer->ok ? buffer->offset : 0;
+}
+
+
+bool
+_zip_buffer_ok(zip_buffer_t *buffer)
+{
+ return buffer->ok;
+}
+
+
+int
+_zip_buffer_put(zip_buffer_t *buffer, const void *src, size_t length)
+{
+ zip_uint8_t *dst = _zip_buffer_get(buffer, length);
+
+ if (dst == NULL) {
+ return -1;
+ }
+
+ memcpy(dst, src, length);
+ return 0;
+}
+
+
+int
+_zip_buffer_put_16(zip_buffer_t *buffer, zip_uint16_t i)
+{
+ zip_uint8_t *data = _zip_buffer_get(buffer, 2);
+
+ if (data == NULL) {
+ return -1;
+ }
+
+ data[0] = (zip_uint8_t)(i & 0xff);
+ data[1] = (zip_uint8_t)((i >> 8) & 0xff);
+
+ return 0;
+}
+
+
+int
+_zip_buffer_put_32(zip_buffer_t *buffer, zip_uint32_t i)
+{
+ zip_uint8_t *data = _zip_buffer_get(buffer, 4);
+
+ if (data == NULL) {
+ return -1;
+ }
+
+ data[0] = (zip_uint8_t)(i & 0xff);
+ data[1] = (zip_uint8_t)((i >> 8) & 0xff);
+ data[2] = (zip_uint8_t)((i >> 16) & 0xff);
+ data[3] = (zip_uint8_t)((i >> 24) & 0xff);
+
+ return 0;
+}
+
+
+int
+_zip_buffer_put_64(zip_buffer_t *buffer, zip_uint64_t i)
+{
+ zip_uint8_t *data = _zip_buffer_get(buffer, 8);
+
+ if (data == NULL) {
+ return -1;
+ }
+
+ data[0] = (zip_uint8_t)(i & 0xff);
+ data[1] = (zip_uint8_t)((i >> 8) & 0xff);
+ data[2] = (zip_uint8_t)((i >> 16) & 0xff);
+ data[3] = (zip_uint8_t)((i >> 24) & 0xff);
+ data[4] = (zip_uint8_t)((i >> 32) & 0xff);
+ data[5] = (zip_uint8_t)((i >> 40) & 0xff);
+ data[6] = (zip_uint8_t)((i >> 48) & 0xff);
+ data[7] = (zip_uint8_t)((i >> 56) & 0xff);
+
+ return 0;
+}
+
+
+int
+_zip_buffer_put_8(zip_buffer_t *buffer, zip_uint8_t i)
+{
+ zip_uint8_t *data = _zip_buffer_get(buffer, 1);
+
+ if (data == NULL) {
+ return -1;
+ }
+
+ data[0] = i;
+
+ return 0;
+}
+
+
+int
+_zip_buffer_set_offset(zip_buffer_t *buffer, zip_uint64_t offset)
+{
+ if (offset > buffer->size) {
+ buffer->ok = false;
+ return -1;
+ }
+
+ buffer->ok = true;
+ buffer->offset = offset;
+
+ return 0;
+}
+
+
+int
+_zip_buffer_skip(zip_buffer_t *buffer, zip_uint64_t length) {
+ zip_uint64_t offset = buffer->offset + length;
+
+ if (offset < buffer->offset) {
+ buffer->ok = false;
+ return -1;
+ }
+ return _zip_buffer_set_offset(buffer, offset);
+}
+
+zip_uint64_t
+_zip_buffer_size(zip_buffer_t *buffer)
+{
+ return buffer->size;
+}