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/*
* Copyright Amazon.com, Inc. or its affiliates. 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.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.
*/
#pragma once
#include <openssl/aes.h>
#include <openssl/des.h>
#include <openssl/dh.h>
#include <openssl/evp.h>
#include <openssl/rc4.h>
#include <openssl/rsa.h>
#include "crypto/s2n_crypto.h"
#include "utils/s2n_blob.h"
#if defined(OPENSSL_IS_BORINGSSL) || defined(OPENSSL_IS_AWSLC)
#define S2N_CIPHER_AEAD_API_AVAILABLE
#endif
struct s2n_session_key {
EVP_CIPHER_CTX *evp_cipher_ctx;
#if defined(S2N_CIPHER_AEAD_API_AVAILABLE)
EVP_AEAD_CTX *evp_aead_ctx;
#endif
};
struct s2n_stream_cipher {
int (*decrypt)(struct s2n_session_key *key, struct s2n_blob *in, struct s2n_blob *out);
int (*encrypt)(struct s2n_session_key *key, struct s2n_blob *in, struct s2n_blob *out);
};
struct s2n_cbc_cipher {
uint8_t block_size;
uint8_t record_iv_size;
int (*decrypt)(struct s2n_session_key *key, struct s2n_blob *iv, struct s2n_blob *in, struct s2n_blob *out);
int (*encrypt)(struct s2n_session_key *key, struct s2n_blob *iv, struct s2n_blob *in, struct s2n_blob *out);
};
struct s2n_aead_cipher {
uint8_t fixed_iv_size;
uint8_t record_iv_size;
uint8_t tag_size;
int (*decrypt)(struct s2n_session_key *key, struct s2n_blob *iv, struct s2n_blob *add, struct s2n_blob *in, struct s2n_blob *out);
int (*encrypt)(struct s2n_session_key *key, struct s2n_blob *iv, struct s2n_blob *add, struct s2n_blob *in, struct s2n_blob *out);
};
struct s2n_composite_cipher {
uint8_t block_size;
uint8_t record_iv_size;
uint8_t mac_key_size;
int (*decrypt)(struct s2n_session_key *key, struct s2n_blob *iv, struct s2n_blob *in, struct s2n_blob *out);
int (*encrypt)(struct s2n_session_key *key, struct s2n_blob *iv, struct s2n_blob *in, struct s2n_blob *out);
int (*set_mac_write_key)(struct s2n_session_key *key, uint8_t *mac_key, uint32_t mac_size);
int (*initial_hmac)(struct s2n_session_key *key, uint8_t *sequence_number, uint8_t content_type, uint16_t protocol_version,
uint16_t payload_and_eiv_len, int *extra);
};
struct s2n_cipher {
enum {
S2N_STREAM,
S2N_CBC,
S2N_AEAD,
S2N_COMPOSITE
} type;
union {
struct s2n_stream_cipher stream;
struct s2n_aead_cipher aead;
struct s2n_cbc_cipher cbc;
struct s2n_composite_cipher comp;
} io;
uint8_t key_material_size;
bool ktls_supported;
uint8_t (*is_available)(void);
int (*init)(struct s2n_session_key *key);
int (*set_decryption_key)(struct s2n_session_key *key, struct s2n_blob *in);
int (*set_encryption_key)(struct s2n_session_key *key, struct s2n_blob *in);
int (*destroy_key)(struct s2n_session_key *key);
};
int s2n_session_key_alloc(struct s2n_session_key *key);
int s2n_session_key_free(struct s2n_session_key *key);
extern const struct s2n_cipher s2n_null_cipher;
extern const struct s2n_cipher s2n_rc4;
extern const struct s2n_cipher s2n_aes128;
extern const struct s2n_cipher s2n_aes256;
extern const struct s2n_cipher s2n_3des;
extern const struct s2n_cipher s2n_aes128_gcm;
extern const struct s2n_cipher s2n_aes256_gcm;
extern const struct s2n_cipher s2n_aes128_sha;
extern const struct s2n_cipher s2n_aes256_sha;
extern const struct s2n_cipher s2n_aes128_sha256;
extern const struct s2n_cipher s2n_aes256_sha256;
extern const struct s2n_cipher s2n_chacha20_poly1305;
extern const struct s2n_cipher s2n_tls13_aes128_gcm;
extern const struct s2n_cipher s2n_tls13_aes256_gcm;
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