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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 "api/s2n.h"
#include "api/unstable/fingerprint.h"
#include "crypto/s2n_hash.h"
#include "stuffer/s2n_stuffer.h"
#include "tls/s2n_client_hello.h"
#include "utils/s2n_result.h"
#define S2N_JA3_HASH_STR_SIZE (MD5_DIGEST_LENGTH * 2)
struct s2n_fingerprint {
size_t raw_size;
const struct s2n_fingerprint_method *method;
struct s2n_client_hello *client_hello;
struct s2n_hash_state hash;
struct s2n_stuffer workspace;
};
struct s2n_fingerprint_hash {
uint32_t bytes_digested;
struct s2n_stuffer *buffer;
struct s2n_hash_state *hash;
};
S2N_RESULT s2n_fingerprint_hash_add_char(struct s2n_fingerprint_hash *hash, char c);
S2N_RESULT s2n_fingerprint_hash_add_str(struct s2n_fingerprint_hash *hash, const char *str, size_t str_size);
S2N_RESULT s2n_fingerprint_hash_add_bytes(struct s2n_fingerprint_hash *hash, const uint8_t *b, size_t size);
S2N_RESULT s2n_fingerprint_hash_digest(struct s2n_fingerprint_hash *hash, struct s2n_blob *out);
bool s2n_fingerprint_hash_do_digest(struct s2n_fingerprint_hash *hash);
struct s2n_fingerprint_method {
s2n_hash_algorithm hash;
uint32_t hash_str_size;
S2N_RESULT (*fingerprint)(struct s2n_fingerprint *fingerprint,
struct s2n_fingerprint_hash *hash, struct s2n_stuffer *output);
};
extern struct s2n_fingerprint_method ja3_fingerprint;
extern struct s2n_fingerprint_method ja4_fingerprint;
bool s2n_fingerprint_is_grease_value(uint16_t val);
S2N_RESULT s2n_fingerprint_parse_extension(struct s2n_stuffer *input, uint16_t *iana);
S2N_RESULT s2n_fingerprint_get_legacy_version(struct s2n_client_hello *ch, uint16_t *version);
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