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crypt.c
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crypt.c
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/* Copyright (c) 2010, Michael Santos <michael.santos@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the author nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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 "erl_nif.h"
#include "crypt.h"
static ERL_NIF_TERM error_message(ErlNifEnv *env, char *atom, char *err, char *msg);
static ERL_NIF_TERM
nif_crypt(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
{
char key[MAXBUFLEN];
char salt[MAXBUFLEN];
char *result = NULL;
int rerrno = 0;
(void)memset(&key, '\0', sizeof(key));
(void)memset(&salt, '\0', sizeof(salt));
if (enif_get_string(env, argv[KEY], key, sizeof(key), ERL_NIF_LATIN1) < 1)
return enif_make_badarg(env);
if (enif_get_string(env, argv[SALT], salt, sizeof(salt), ERL_NIF_LATIN1) < 1)
return enif_make_badarg(env);
errno = 0;
result = crypt(key, salt);
rerrno = errno;
(void)memset(&key, '\0', sizeof(key));
if (result == NULL)
return error_message(env, "error", "crypt", strerror(rerrno));
return enif_make_string(env, result, ERL_NIF_LATIN1);
}
static ERL_NIF_TERM
error_message(ErlNifEnv *env, char *atom, char *err, char *msg)
{
return enif_make_tuple(env, 2,
enif_make_atom(env, atom),
enif_make_tuple(env, 2,
enif_make_atom(env, err),
enif_make_string(env, msg, ERL_NIF_LATIN1)));
}
static ErlNifFunc nif_funcs[] = {
{"crypt", 2, nif_crypt}
};
ERL_NIF_INIT(crypt, nif_funcs, NULL, NULL, NULL, NULL)