eet-data-cipher_decipher.c

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eet-data-cipher_decipher.c
//Compile with:
// gcc -o eet-data-cipher_decipher eet-data-cipher_decipher.c `pkg-config --cflags --libs eet eina`
#include <Eina.h>
#include <Eet.h>
#include <stdio.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
int
main(void)
{
const char *buffer = "Here is a string of data to save !";
const char *key = "This is a crypto key";
const char *key_bad = "This is another crypto key";
char *file = strdup("/tmp/eet_cipher_example_XXXXXX");
Eet_File *ef;
char *test;
int size;
int tmpfd;
eet_init();
if (-1 == (tmpfd = mkstemp(file)) || !!close(tmpfd))
{
fprintf(
stderr, "ERROR: could not create temporary file (%s) : %s\n",
file, strerror(errno));
goto panic;
}
/* Crypt an eet file. */
ef = eet_open(file, EET_FILE_MODE_WRITE);
if (!ef)
{
fprintf(
stderr, "ERROR: could not access file (%s).\n", file);
goto error;
}
if (!eet_write_cipher(ef, "keys/tests", buffer, strlen(buffer) + 1, 0, key))
{
fprintf(
stderr, "ERROR: could not access file (%s).\n", file);
goto error;
}
eet_close(ef);
/* Decrypt an eet file. */
ef = eet_open(file, EET_FILE_MODE_READ);
if (!ef)
{
fprintf(
stderr, "ERROR: could not access file (%s).\n", file);
goto error;
}
test = eet_read_cipher(ef, "keys/tests", &size, key);
if (!test)
{
fprintf(
stderr, "ERROR: could decript contents on file %s, with key %s.\n",
file, key);
goto error;
}
if (size != (int)strlen(buffer) + 1)
{
fprintf(
stderr, "ERROR: something is wrong with the decripted data\n");
goto error;
}
if (memcmp(test, buffer, strlen(buffer) + 1) != 0)
{
fprintf(
stderr, "ERROR: something is wrong with the decripted data\n");
goto error;
}
eet_close(ef);
/* Decrypt an eet file, now using our BAD key!! */
ef = eet_open(file, EET_FILE_MODE_READ);
if (!ef)
{
fprintf(
stderr, "ERROR: could not access file (%s).\n", file);
goto error;
}
test = eet_read_cipher(ef, "keys/tests", &size, key_bad);
if (size == (int)strlen(buffer) + 1)
if (memcmp(test, buffer, strlen(buffer) + 1) == 0)
{
fprintf(
stderr, "ERROR: something is wrong with the contents of %s, as"
" we accessed it with a different key and it decripted our"
" information right.\n", file);
goto error;
}
eet_close(ef);
error:
if (unlink(file) != 0)
{
fprintf(
stderr, "ERROR: could not unlink file (%s).\n", file);
}
panic:
eet_shutdown();
}