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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2010-2018. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#include "rc4.h"
ERL_NIF_TERM rc4_set_key(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (Key) */
#ifndef OPENSSL_NO_RC4
ErlNifBinary key;
ERL_NIF_TERM ret;
RC4_KEY *rc4_key;
CHECK_NO_FIPS_MODE();
ASSERT(argc == 1);
if (!enif_inspect_iolist_as_binary(env, argv[0], &key))
goto bad_arg;
if (key.size > INT_MAX)
goto bad_arg;
if ((rc4_key = (RC4_KEY*)enif_make_new_binary(env, sizeof(RC4_KEY), &ret)) == NULL)
goto err;
RC4_set_key(rc4_key, (int)key.size, key.data);
return ret;
bad_arg:
err:
return enif_make_badarg(env);
#else
return enif_raise_exception(env, atom_notsup);
#endif
}
ERL_NIF_TERM rc4_encrypt_with_state(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{/* (State, Data) */
#ifndef OPENSSL_NO_RC4
ErlNifBinary state, data;
RC4_KEY* rc4_key;
ERL_NIF_TERM new_state, new_data;
unsigned char *outp;
CHECK_NO_FIPS_MODE();
ASSERT(argc == 2);
if (!enif_inspect_iolist_as_binary(env, argv[0], &state))
goto bad_arg;
if (state.size != sizeof(RC4_KEY))
goto bad_arg;
if (!enif_inspect_iolist_as_binary(env, argv[1], &data))
goto bad_arg;
if ((rc4_key = (RC4_KEY*)enif_make_new_binary(env, sizeof(RC4_KEY), &new_state)) == NULL)
goto err;
if ((outp = enif_make_new_binary(env, data.size, &new_data)) == NULL)
goto err;
memcpy(rc4_key, state.data, sizeof(RC4_KEY));
RC4(rc4_key, data.size, data.data, outp);
CONSUME_REDS(env, data);
return enif_make_tuple2(env, new_state, new_data);
bad_arg:
err:
return enif_make_badarg(env);
#else
return enif_raise_exception(env, atom_notsup);
#endif
}
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