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/*
* Copyright 2018 Jonathan Dieter <jdieter@gmail.com>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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 <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <zck.h>
#include "zck_private.h"
#include "util.h"
static char *checksum="8efaeb8e7b3d51a943353f7e6ca4a22266f18c3ef10478b20d50040f4226015d";
int main (int argc, char *argv[]) {
/* Create empty zchunk file */
int out = open("empty.zck", O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666);
if(out < 0) {
perror("Unable to open empty.zck for writing");
exit(1);
}
zckCtx *zck = zck_create();
if(zck == NULL)
exit(1);
if(!zck_init_write(zck, out)) {
printf("%s", zck_get_error(zck));
exit(1);
}
if(!zck_close(zck))
exit(1);
close(out);
zck_free(&zck);
/* Open zchunk file and check that checksum matches */
int in = open("empty.zck", O_RDONLY | O_BINARY);
if(in < 0) {
perror("Unable to open empty.zck for reading");
exit(1);
}
/* File should be 101 bytes, but we'll go a bit over */
char *data = zmalloc(1000);
if(data == NULL) {
perror("Unable to allocate 1000 bytes");
exit(1);
}
ssize_t len = read(in, data, 1000);
if(len < 0) {
perror("Unable to read from empty.zck");
exit(1);
}
char *cksum = get_hash(data, len, ZCK_HASH_SHA256);
printf("empty.zck: (SHA-256)%s\n", cksum);
if(memcmp(cksum, checksum, strlen(cksum)) != 0) {
printf("Expected checksum: (SHA-256)%s\n", checksum);
exit(1);
}
free(cksum);
/* Go back to beginning of file and read data from it */
if(lseek(in, 0, SEEK_SET) != 0) {
perror("Unable to seek to beginning of empty.zck");
exit(1);
}
zck = zck_create();
if(zck == NULL)
exit(1);
if(!zck_init_read(zck, in)) {
printf("%s", zck_get_error(zck));
exit(1);
}
memset(data, 0, 1000);
len = zck_read(zck, data, 1000);
if(len > 0) {
printf("%lli bytes read, but file should be empty\n", (long long) len);
exit(1);
}
if(!zck_close(zck))
exit(1);
zck_free(&zck);
free(data);
return 0;
}
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