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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%
*/
#ifndef E_CIPHER_H__
#define E_CIPHER_H__ 1
#include "common.h"
struct cipher_type_t {
union {
const char* str; /* before init */
ERL_NIF_TERM atom; /* after init */
}type;
union {
const EVP_CIPHER* (*funcp)(void); /* before init, NULL if notsup */
const EVP_CIPHER* p; /* after init, NULL if notsup */
}cipher;
size_t key_len; /* != 0 to also match on key_len */
unsigned flags;
union {
struct aead_ctrl {int ctx_ctrl_set_ivlen, ctx_ctrl_get_tag, ctx_ctrl_set_tag;} aead;
} extra;
};
/* masks in the flags field if cipher_type_t */
#define NO_FIPS_CIPHER 1
#define AES_CFBx 2
#define ECB_BUG_0_9_8L 4
#define AEAD_CIPHER 8
#define NON_EVP_CIPHER 16
#define AES_CTR_COMPAT 32
#define CCM_MODE 64
#define GCM_MODE 128
#ifdef FIPS_SUPPORT
/* May have FIPS support, must check dynamically if it is enabled */
# define FORBIDDEN_IN_FIPS(P) (((P)->flags & NO_FIPS_CIPHER) && FIPS_mode())
#else
/* No FIPS support since the symbol FIPS_SUPPORT is undefined */
# define FORBIDDEN_IN_FIPS(P) 0
#endif
extern ErlNifResourceType* evp_cipher_ctx_rtype;
struct evp_cipher_ctx {
EVP_CIPHER_CTX* ctx;
int iv_len;
#if !defined(HAVE_EVP_AES_CTR)
ErlNifEnv* env;
ERL_NIF_TERM state;
#endif
};
ERL_NIF_TERM cipher_info_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
int init_cipher_ctx(ErlNifEnv *env);
void init_cipher_types(ErlNifEnv* env);
const struct cipher_type_t* get_cipher_type_no_key(ERL_NIF_TERM type);
const struct cipher_type_t* get_cipher_type(ERL_NIF_TERM type, size_t key_len);
int cmp_cipher_types(const void *keyp, const void *elemp);
int cmp_cipher_types_no_key(const void *keyp, const void *elemp);
ERL_NIF_TERM cipher_types_as_list(ErlNifEnv* env);
#endif /* E_CIPHER_H__ */
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