VeraCrypt
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path: root/src/Common/libzip/zip_source_crc.c
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Diffstat (limited to 'src/Common/libzip/zip_source_crc.c')
-rw-r--r--src/Common/libzip/zip_source_crc.c234
1 files changed, 115 insertions, 119 deletions
diff --git a/src/Common/libzip/zip_source_crc.c b/src/Common/libzip/zip_source_crc.c
index 01f526c6..8797dfe1 100644
--- a/src/Common/libzip/zip_source_crc.c
+++ b/src/Common/libzip/zip_source_crc.c
@@ -1,6 +1,6 @@
/*
zip_source_crc.c -- pass-through source that calculates CRC32 and size
- Copyright (C) 2009-2016 Dieter Baron and Thomas Klausner
+ Copyright (C) 2009-2017 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>
@@ -17,7 +17,7 @@
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
@@ -32,18 +32,18 @@
*/
+#include <limits.h>
#include <stdlib.h>
#include <string.h>
-#include <limits.h>
#include "zipint.h"
struct crc_context {
- int validate; /* whether to check CRC on EOF and return error on mismatch */
+ int validate; /* whether to check CRC on EOF and return error on mismatch */
int crc_complete; /* whether CRC was computed for complete file */
zip_error_t error;
zip_uint64_t size;
- zip_uint64_t position; /* current reading position */
+ zip_uint64_t position; /* current reading position */
zip_uint64_t crc_position; /* how far we've computed the CRC */
zip_uint32_t crc;
};
@@ -52,8 +52,7 @@ static zip_int64_t crc_read(zip_source_t *, void *, void *, zip_uint64_t, zip_so
zip_source_t *
-zip_source_crc(zip_t *za, zip_source_t *src, int validate)
-{
+zip_source_crc(zip_t *za, zip_source_t *src, int validate) {
struct crc_context *ctx;
if (src == NULL) {
@@ -61,7 +60,7 @@ zip_source_crc(zip_t *za, zip_source_t *src, int validate)
return NULL;
}
- if ((ctx=(struct crc_context *)malloc(sizeof(*ctx))) == NULL) {
+ if ((ctx = (struct crc_context *)malloc(sizeof(*ctx))) == NULL) {
zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
return NULL;
}
@@ -78,125 +77,122 @@ zip_source_crc(zip_t *za, zip_source_t *src, int validate)
static zip_int64_t
-crc_read(zip_source_t *src, void *_ctx, void *data, zip_uint64_t len, zip_source_cmd_t cmd)
-{
+crc_read(zip_source_t *src, void *_ctx, void *data, zip_uint64_t len, zip_source_cmd_t cmd) {
struct crc_context *ctx;
zip_int64_t n;
ctx = (struct crc_context *)_ctx;
switch (cmd) {
- case ZIP_SOURCE_OPEN:
- ctx->position = 0;
- return 0;
-
- case ZIP_SOURCE_READ:
- if ((n = zip_source_read(src, data, len)) < 0) {
- _zip_error_set_from_source(&ctx->error, src);
- return -1;
- }
-
- if (n == 0) {
- if (ctx->crc_position == ctx->position) {
- ctx->crc_complete = 1;
- ctx->size = ctx->position;
-
- if (ctx->validate) {
- struct zip_stat st;
-
- if (zip_source_stat(src, &st) < 0) {
- _zip_error_set_from_source(&ctx->error, src);
- return -1;
- }
-
- if ((st.valid & ZIP_STAT_CRC) && st.crc != ctx->crc) {
- zip_error_set(&ctx->error, ZIP_ER_CRC, 0);
- return -1;
- }
- if ((st.valid & ZIP_STAT_SIZE) && st.size != ctx->size) {
- zip_error_set(&ctx->error, ZIP_ER_INCONS, 0);
- return -1;
- }
- }
- }
- }
- else if (!ctx->crc_complete && ctx->position <= ctx->crc_position) {
- zip_uint64_t i, nn;
-
- for (i = ctx->crc_position - ctx->position; i < (zip_uint64_t)n; i += nn) {
- nn = ZIP_MIN(UINT_MAX, (zip_uint64_t)n-i);
-
- ctx->crc = (zip_uint32_t)crc32(ctx->crc, (const Bytef *)data+i, (uInt)nn);
- ctx->crc_position += nn;
+ case ZIP_SOURCE_OPEN:
+ ctx->position = 0;
+ return 0;
+
+ case ZIP_SOURCE_READ:
+ if ((n = zip_source_read(src, data, len)) < 0) {
+ _zip_error_set_from_source(&ctx->error, src);
+ return -1;
+ }
+
+ if (n == 0) {
+ if (ctx->crc_position == ctx->position) {
+ ctx->crc_complete = 1;
+ ctx->size = ctx->position;
+
+ if (ctx->validate) {
+ struct zip_stat st;
+
+ if (zip_source_stat(src, &st) < 0) {
+ _zip_error_set_from_source(&ctx->error, src);
+ return -1;
+ }
+
+ if ((st.valid & ZIP_STAT_CRC) && st.crc != ctx->crc) {
+ zip_error_set(&ctx->error, ZIP_ER_CRC, 0);
+ return -1;
+ }
+ if ((st.valid & ZIP_STAT_SIZE) && st.size != ctx->size) {
+ zip_error_set(&ctx->error, ZIP_ER_INCONS, 0);
+ return -1;
+ }
}
- }
- ctx->position += (zip_uint64_t)n;
- return n;
-
- case ZIP_SOURCE_CLOSE:
- return 0;
-
- case ZIP_SOURCE_STAT:
- {
- zip_stat_t *st;
-
- st = (zip_stat_t *)data;
-
- if (ctx->crc_complete) {
- /* TODO: Set comp_size, comp_method, encryption_method?
- After all, this only works for uncompressed data. */
- st->size = ctx->size;
- st->crc = ctx->crc;
- st->comp_size = ctx->size;
- st->comp_method = ZIP_CM_STORE;
- st->encryption_method = ZIP_EM_NONE;
- st->valid |= ZIP_STAT_SIZE|ZIP_STAT_CRC|ZIP_STAT_COMP_SIZE|ZIP_STAT_COMP_METHOD|ZIP_STAT_ENCRYPTION_METHOD;;
}
- return 0;
- }
-
- case ZIP_SOURCE_ERROR:
- return zip_error_to_data(&ctx->error, data, len);
-
- case ZIP_SOURCE_FREE:
- free(ctx);
- return 0;
-
- case ZIP_SOURCE_SUPPORTS:
- {
- zip_int64_t mask = zip_source_supports(src);
-
- if (mask < 0) {
- _zip_error_set_from_source(&ctx->error, src);
- return -1;
- }
-
- return mask & ~zip_source_make_command_bitmap(ZIP_SOURCE_BEGIN_WRITE, ZIP_SOURCE_COMMIT_WRITE, ZIP_SOURCE_ROLLBACK_WRITE, ZIP_SOURCE_SEEK_WRITE, ZIP_SOURCE_TELL_WRITE, ZIP_SOURCE_REMOVE, -1);
- }
-
- case ZIP_SOURCE_SEEK:
- {
- zip_int64_t new_position;
- zip_source_args_seek_t *args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error);
-
- if (args == NULL) {
- return -1;
+ }
+ else if (!ctx->crc_complete && ctx->position <= ctx->crc_position) {
+ zip_uint64_t i, nn;
+
+ for (i = ctx->crc_position - ctx->position; i < (zip_uint64_t)n; i += nn) {
+ nn = ZIP_MIN(UINT_MAX, (zip_uint64_t)n - i);
+
+ ctx->crc = (zip_uint32_t)crc32(ctx->crc, (const Bytef *)data + i, (uInt)nn);
+ ctx->crc_position += nn;
}
- if (zip_source_seek(src, args->offset, args->whence) < 0 || (new_position = zip_source_tell(src)) < 0) {
- _zip_error_set_from_source(&ctx->error, src);
- return -1;
- }
-
- ctx->position = (zip_uint64_t)new_position;
-
- return 0;
- }
-
- case ZIP_SOURCE_TELL:
- return (zip_int64_t)ctx->position;
-
- default:
- zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0);
- return -1;
+ }
+ ctx->position += (zip_uint64_t)n;
+ return n;
+
+ case ZIP_SOURCE_CLOSE:
+ return 0;
+
+ case ZIP_SOURCE_STAT: {
+ zip_stat_t *st;
+
+ st = (zip_stat_t *)data;
+
+ if (ctx->crc_complete) {
+ /* TODO: Set comp_size, comp_method, encryption_method?
+ After all, this only works for uncompressed data. */
+ st->size = ctx->size;
+ st->crc = ctx->crc;
+ st->comp_size = ctx->size;
+ st->comp_method = ZIP_CM_STORE;
+ st->encryption_method = ZIP_EM_NONE;
+ st->valid |= ZIP_STAT_SIZE | ZIP_STAT_CRC | ZIP_STAT_COMP_SIZE | ZIP_STAT_COMP_METHOD | ZIP_STAT_ENCRYPTION_METHOD;
+ ;
+ }
+ return 0;
+ }
+
+ case ZIP_SOURCE_ERROR:
+ return zip_error_to_data(&ctx->error, data, len);
+
+ case ZIP_SOURCE_FREE:
+ free(ctx);
+ return 0;
+
+ case ZIP_SOURCE_SUPPORTS: {
+ zip_int64_t mask = zip_source_supports(src);
+
+ if (mask < 0) {
+ _zip_error_set_from_source(&ctx->error, src);
+ return -1;
+ }
+
+ return mask & ~zip_source_make_command_bitmap(ZIP_SOURCE_BEGIN_WRITE, ZIP_SOURCE_COMMIT_WRITE, ZIP_SOURCE_ROLLBACK_WRITE, ZIP_SOURCE_SEEK_WRITE, ZIP_SOURCE_TELL_WRITE, ZIP_SOURCE_REMOVE, ZIP_SOURCE_GET_COMPRESSION_FLAGS, -1);
+ }
+
+ case ZIP_SOURCE_SEEK: {
+ zip_int64_t new_position;
+ zip_source_args_seek_t *args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error);
+
+ if (args == NULL) {
+ return -1;
+ }
+ if (zip_source_seek(src, args->offset, args->whence) < 0 || (new_position = zip_source_tell(src)) < 0) {
+ _zip_error_set_from_source(&ctx->error, src);
+ return -1;
+ }
+
+ ctx->position = (zip_uint64_t)new_position;
+
+ return 0;
+ }
+
+ case ZIP_SOURCE_TELL:
+ return (zip_int64_t)ctx->position;
+
+ default:
+ zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0);
+ return -1;
}
}