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authorMounir IDRASSI <mounir.idrassi@idrix.fr>2016-09-15 10:04:05 +0200
committerMounir IDRASSI <mounir.idrassi@idrix.fr>2016-10-17 18:40:06 +0200
commit4dacedd9ccdbdc6a6e62d9fb86e9b2ea903a3629 (patch)
tree567350f56dd4ee4dd291d13199610d38dac51879 /src/Common/libzip/zip_source_filep.c
parent66891638d51351fae5cd82a88c1a64661a025de0 (diff)
downloadVeraCrypt-4dacedd9ccdbdc6a6e62d9fb86e9b2ea903a3629.tar.gz
VeraCrypt-4dacedd9ccdbdc6a6e62d9fb86e9b2ea903a3629.zip
Windows: Replace XZip/XUnzip library with zlib and libzip and include the sources of these library into VeraCrypt source tree.
Diffstat (limited to 'src/Common/libzip/zip_source_filep.c')
-rw-r--r--src/Common/libzip/zip_source_filep.c503
1 files changed, 503 insertions, 0 deletions
diff --git a/src/Common/libzip/zip_source_filep.c b/src/Common/libzip/zip_source_filep.c
new file mode 100644
index 00000000..70255dec
--- /dev/null
+++ b/src/Common/libzip/zip_source_filep.c
@@ -0,0 +1,503 @@
+/*
+ zip_source_filep.c -- create data source from FILE *
+ Copyright (C) 1999-2015 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 <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "zipint.h"
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef _WIN32
+/* WIN32 needs <fcntl.h> for _O_BINARY */
+#include <fcntl.h>
+#endif
+
+/* Windows sys/types.h does not provide these */
+#ifndef S_ISREG
+#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
+#endif
+#if defined(S_IXUSR) && defined(S_IRWXG) && defined(S_IRWXO)
+#define _SAFE_MASK (S_IXUSR | S_IRWXG | S_IRWXO)
+#elif defined(_S_IWRITE)
+#define _SAFE_MASK (_S_IWRITE)
+#else
+#error do not know safe values for umask, please report this
+#endif
+
+#ifdef _MSC_VER
+/* MSVC doesn't have mode_t */
+typedef int mode_t;
+#endif
+
+struct read_file {
+ zip_error_t error; /* last error information */
+ zip_int64_t supports;
+
+ /* reading */
+ char *fname; /* name of file to read from */
+ FILE *f; /* file to read from */
+ struct zip_stat st; /* stat information passed in */
+ zip_uint64_t start; /* start offset of data to read */
+ zip_uint64_t end; /* end offset of data to read, 0 for up to EOF */
+ zip_uint64_t current; /* current offset */
+
+ /* writing */
+ char *tmpname;
+ FILE *fout;
+};
+
+static zip_int64_t read_file(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd);
+static int create_temp_output(struct read_file *ctx);
+static int _zip_fseek_u(FILE *f, zip_uint64_t offset, int whence, zip_error_t *error);
+static int _zip_fseek(FILE *f, zip_int64_t offset, int whence, zip_error_t *error);
+
+
+ZIP_EXTERN zip_source_t *
+zip_source_filep(zip_t *za, FILE *file, zip_uint64_t start, zip_int64_t len)
+{
+ if (za == NULL)
+ return NULL;
+
+ return zip_source_filep_create(file, start, len, &za->error);
+}
+
+
+ZIP_EXTERN zip_source_t *
+zip_source_filep_create(FILE *file, zip_uint64_t start, zip_int64_t length, zip_error_t *error)
+{
+ if (file == NULL || length < -1) {
+ zip_error_set(error, ZIP_ER_INVAL, 0);
+ return NULL;
+ }
+
+ return _zip_source_file_or_p(NULL, file, start, length, NULL, error);
+}
+
+
+zip_source_t *
+_zip_source_file_or_p(const char *fname, FILE *file, zip_uint64_t start, zip_int64_t len, const zip_stat_t *st, zip_error_t *error)
+{
+ struct read_file *ctx;
+ zip_source_t *zs;
+
+ if (file == NULL && fname == NULL) {
+ zip_error_set(error, ZIP_ER_INVAL, 0);
+ return NULL;
+ }
+
+ if ((ctx=(struct read_file *)malloc(sizeof(struct read_file))) == NULL) {
+ zip_error_set(error, ZIP_ER_MEMORY, 0);
+ return NULL;
+ }
+
+ ctx->fname = NULL;
+ if (fname) {
+ if ((ctx->fname=strdup(fname)) == NULL) {
+ zip_error_set(error, ZIP_ER_MEMORY, 0);
+ free(ctx);
+ return NULL;
+ }
+ }
+ ctx->f = file;
+ ctx->start = start;
+ ctx->end = (len < 0 ? 0 : start+(zip_uint64_t)len);
+ if (st) {
+ memcpy(&ctx->st, st, sizeof(ctx->st));
+ ctx->st.name = NULL;
+ ctx->st.valid &= ~ZIP_STAT_NAME;
+ }
+ else {
+ zip_stat_init(&ctx->st);
+ }
+
+ ctx->tmpname = NULL;
+ ctx->fout = NULL;
+
+ zip_error_init(&ctx->error);
+
+ ctx->supports = ZIP_SOURCE_SUPPORTS_READABLE | zip_source_make_command_bitmap(ZIP_SOURCE_SUPPORTS, ZIP_SOURCE_TELL, -1);
+ if (ctx->fname) {
+ struct stat sb;
+
+ if (stat(ctx->fname, &sb) < 0 || S_ISREG(sb.st_mode)) {
+ ctx->supports = ZIP_SOURCE_SUPPORTS_WRITABLE;
+ }
+ }
+ else if (fseeko(ctx->f, 0, SEEK_CUR) == 0) {
+ ctx->supports = ZIP_SOURCE_SUPPORTS_SEEKABLE;
+ }
+
+ if ((zs=zip_source_function_create(read_file, ctx, error)) == NULL) {
+ free(ctx->fname);
+ free(ctx);
+ return NULL;
+ }
+
+ return zs;
+}
+
+
+static int
+create_temp_output(struct read_file *ctx)
+{
+ char *temp;
+ int tfd;
+ mode_t mask;
+ FILE *tfp;
+
+ if ((temp=(char *)malloc(strlen(ctx->fname)+8)) == NULL) {
+ zip_error_set(&ctx->error, ZIP_ER_MEMORY, 0);
+ return -1;
+ }
+ sprintf(temp, "%s.XXXXXX", ctx->fname);
+
+ mask = umask(_SAFE_MASK);
+ if ((tfd=mkstemp(temp)) == -1) {
+ zip_error_set(&ctx->error, ZIP_ER_TMPOPEN, errno);
+ umask(mask);
+ free(temp);
+ return -1;
+ }
+ umask(mask);
+
+ if ((tfp=fdopen(tfd, "r+b")) == NULL) {
+ zip_error_set(&ctx->error, ZIP_ER_TMPOPEN, errno);
+ close(tfd);
+ (void)remove(temp);
+ free(temp);
+ return -1;
+ }
+
+#ifdef _WIN32
+ /*
+ According to Pierre Joye, Windows in some environments per
+ default creates text files, so force binary mode.
+ */
+ _setmode(_fileno(tfp), _O_BINARY );
+#endif
+
+ ctx->fout = tfp;
+ ctx->tmpname = temp;
+
+ return 0;
+}
+
+
+static zip_int64_t
+read_file(void *state, void *data, zip_uint64_t len, zip_source_cmd_t cmd)
+{
+ struct read_file *ctx;
+ char *buf;
+ zip_uint64_t n;
+ size_t i;
+
+ ctx = (struct read_file *)state;
+ buf = (char *)data;
+
+ switch (cmd) {
+ case ZIP_SOURCE_BEGIN_WRITE:
+ if (ctx->fname == NULL) {
+ zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0);
+ return -1;
+ }
+ return create_temp_output(ctx);
+
+ case ZIP_SOURCE_COMMIT_WRITE: {
+ mode_t mask;
+
+ if (fclose(ctx->fout) < 0) {
+ ctx->fout = NULL;
+ zip_error_set(&ctx->error, ZIP_ER_WRITE, errno);
+ }
+ ctx->fout = NULL;
+ if (rename(ctx->tmpname, ctx->fname) < 0) {
+ zip_error_set(&ctx->error, ZIP_ER_RENAME, errno);
+ return -1;
+ }
+ mask = umask(022);
+ umask(mask);
+ /* not much we can do if chmod fails except make the whole commit fail */
+ (void)chmod(ctx->fname, 0666&~mask);
+ free(ctx->tmpname);
+ ctx->tmpname = NULL;
+ return 0;
+ }
+
+ case ZIP_SOURCE_CLOSE:
+ if (ctx->fname) {
+ fclose(ctx->f);
+ ctx->f = NULL;
+ }
+ return 0;
+
+ case ZIP_SOURCE_ERROR:
+ return zip_error_to_data(&ctx->error, data, len);
+
+ case ZIP_SOURCE_FREE:
+ free(ctx->fname);
+ free(ctx->tmpname);
+ if (ctx->f)
+ fclose(ctx->f);
+ free(ctx);
+ return 0;
+
+ case ZIP_SOURCE_OPEN:
+ if (ctx->fname) {
+ if ((ctx->f=fopen(ctx->fname, "rb")) == NULL) {
+ zip_error_set(&ctx->error, ZIP_ER_OPEN, errno);
+ return -1;
+ }
+ }
+
+ if (ctx->start > 0) {
+ if (_zip_fseek_u(ctx->f, ctx->start, SEEK_SET, &ctx->error) < 0) {
+ return -1;
+ }
+ }
+ ctx->current = ctx->start;
+ return 0;
+
+ case ZIP_SOURCE_READ:
+ if (ctx->end > 0) {
+ n = ctx->end-ctx->current;
+ if (n > len) {
+ n = len;
+ }
+ }
+ else {
+ n = len;
+ }
+
+ if (n > SIZE_MAX)
+ n = SIZE_MAX;
+
+ if ((i=fread(buf, 1, (size_t)n, ctx->f)) == 0) {
+ if (ferror(ctx->f)) {
+ zip_error_set(&ctx->error, ZIP_ER_READ, errno);
+ return -1;
+ }
+ }
+ ctx->current += i;
+
+ return (zip_int64_t)i;
+
+ case ZIP_SOURCE_REMOVE:
+ if (remove(ctx->fname) < 0) {
+ zip_error_set(&ctx->error, ZIP_ER_REMOVE, errno);
+ return -1;
+ }
+ return 0;
+
+ case ZIP_SOURCE_ROLLBACK_WRITE:
+ if (ctx->fout) {
+ fclose(ctx->fout);
+ ctx->fout = NULL;
+ }
+ (void)remove(ctx->tmpname);
+ free(ctx->tmpname);
+ ctx->tmpname = NULL;
+ return 0;
+
+ case ZIP_SOURCE_SEEK: {
+ zip_int64_t new_current;
+ int need_seek;
+ zip_source_args_seek_t *args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error);
+
+ if (args == NULL)
+ return -1;
+
+ need_seek = 1;
+
+ switch (args->whence) {
+ case SEEK_SET:
+ new_current = args->offset;
+ break;
+
+ case SEEK_END:
+ if (ctx->end == 0) {
+ if (_zip_fseek(ctx->f, args->offset, SEEK_END, &ctx->error) < 0) {
+ return -1;
+ }
+ if ((new_current = ftello(ctx->f)) < 0) {
+ zip_error_set(&ctx->error, ZIP_ER_SEEK, errno);
+ return -1;
+ }
+ need_seek = 0;
+ }
+ else {
+ new_current = (zip_int64_t)ctx->end + args->offset;
+ }
+ break;
+ case SEEK_CUR:
+ new_current = (zip_int64_t)ctx->current + args->offset;
+ break;
+
+ default:
+ zip_error_set(&ctx->error, ZIP_ER_INVAL, 0);
+ return -1;
+ }
+
+ if (new_current < 0 || (zip_uint64_t)new_current < ctx->start || (ctx->end != 0 && (zip_uint64_t)new_current > ctx->end)) {
+ zip_error_set(&ctx->error, ZIP_ER_INVAL, 0);
+ return -1;
+ }
+
+ ctx->current = (zip_uint64_t)new_current;
+
+ if (need_seek) {
+ if (_zip_fseek_u(ctx->f, ctx->current, SEEK_SET, &ctx->error) < 0) {
+ return -1;
+ }
+ }
+ return 0;
+ }
+
+ case ZIP_SOURCE_SEEK_WRITE: {
+ zip_source_args_seek_t *args;
+
+ args = ZIP_SOURCE_GET_ARGS(zip_source_args_seek_t, data, len, &ctx->error);
+ if (args == NULL) {
+ return -1;
+ }
+
+ if (_zip_fseek(ctx->fout, args->offset, args->whence, &ctx->error) < 0) {
+ return -1;
+ }
+ return 0;
+ }
+
+ case ZIP_SOURCE_STAT: {
+ if (len < sizeof(ctx->st))
+ return -1;
+
+ if (ctx->st.valid != 0)
+ memcpy(data, &ctx->st, sizeof(ctx->st));
+ else {
+ zip_stat_t *st;
+ struct stat fst;
+ int err;
+
+ if (ctx->f)
+ err = fstat(fileno(ctx->f), &fst);
+ else
+ err = stat(ctx->fname, &fst);
+
+ if (err != 0) {
+ zip_error_set(&ctx->error, ZIP_ER_READ, errno);
+ return -1;
+ }
+
+ st = (zip_stat_t *)data;
+
+ zip_stat_init(st);
+ st->mtime = fst.st_mtime;
+ st->valid |= ZIP_STAT_MTIME;
+ if (ctx->end != 0) {
+ st->size = ctx->end - ctx->start;
+ st->valid |= ZIP_STAT_SIZE;
+ }
+ else if ((fst.st_mode&S_IFMT) == S_IFREG) {
+ st->size = (zip_uint64_t)fst.st_size;
+ st->valid |= ZIP_STAT_SIZE;
+ }
+ }
+ return sizeof(ctx->st);
+ }
+
+ case ZIP_SOURCE_SUPPORTS:
+ return ctx->supports;
+
+ case ZIP_SOURCE_TELL:
+ return (zip_int64_t)ctx->current;
+
+ case ZIP_SOURCE_TELL_WRITE:
+ {
+ off_t ret = ftello(ctx->fout);
+
+ if (ret < 0) {
+ zip_error_set(&ctx->error, ZIP_ER_TELL, errno);
+ return -1;
+ }
+ return ret;
+ }
+
+ case ZIP_SOURCE_WRITE:
+ {
+ size_t ret;
+
+ clearerr(ctx->fout);
+ ret = fwrite(data, 1, len, ctx->fout);
+ if (ret != len || ferror(ctx->fout)) {
+ zip_error_set(&ctx->error, ZIP_ER_WRITE, errno);
+ return -1;
+ }
+
+ return (zip_int64_t)ret;
+ }
+
+ default:
+ zip_error_set(&ctx->error, ZIP_ER_OPNOTSUPP, 0);
+ return -1;
+ }
+}
+
+
+static int
+_zip_fseek_u(FILE *f, zip_uint64_t offset, int whence, zip_error_t *error)
+{
+ if (offset > ZIP_INT64_MAX) {
+ zip_error_set(error, ZIP_ER_SEEK, EOVERFLOW);
+ return -1;
+ }
+ return _zip_fseek(f, (zip_int64_t)offset, whence, error);
+}
+
+
+static int
+_zip_fseek(FILE *f, zip_int64_t offset, int whence, zip_error_t *error)
+{
+ if (offset > ZIP_FSEEK_MAX || offset < ZIP_FSEEK_MIN) {
+ zip_error_set(error, ZIP_ER_SEEK, EOVERFLOW);
+ return -1;
+ }
+ if (fseeko(f, (off_t)offset, whence) < 0) {
+ zip_error_set(error, ZIP_ER_SEEK, errno);
+ return -1;
+ }
+ return 0;
+}