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ngx_event_quic_protection.h
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ngx_event_quic_protection.h
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/*
* Copyright (C) Nginx, Inc.
*/
#ifndef _NGX_EVENT_QUIC_PROTECTION_H_INCLUDED_
#define _NGX_EVENT_QUIC_PROTECTION_H_INCLUDED_
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event_quic_transport.h>
#define NGX_QUIC_ENCRYPTION_LAST ((ssl_encryption_application) + 1)
/* RFC 5116, 5.1/5.3 and RFC 8439, 2.3/2.5 for all supported ciphers */
#define NGX_QUIC_IV_LEN 12
#define NGX_QUIC_TAG_LEN 16
/* largest hash used in TLS is SHA-384 */
#define NGX_QUIC_MAX_MD_SIZE 48
#ifdef OPENSSL_IS_BORINGSSL
#define ngx_quic_cipher_t EVP_AEAD
#define ngx_quic_crypto_ctx_t EVP_AEAD_CTX
#else
#define ngx_quic_cipher_t EVP_CIPHER
#define ngx_quic_crypto_ctx_t EVP_CIPHER_CTX
#endif
typedef struct {
size_t len;
u_char data[NGX_QUIC_MAX_MD_SIZE];
} ngx_quic_md_t;
typedef struct {
size_t len;
u_char data[NGX_QUIC_IV_LEN];
} ngx_quic_iv_t;
typedef struct {
ngx_quic_md_t secret;
ngx_quic_iv_t iv;
ngx_quic_md_t hp;
ngx_quic_crypto_ctx_t *ctx;
EVP_CIPHER_CTX *hp_ctx;
} ngx_quic_secret_t;
typedef struct {
ngx_quic_secret_t client;
ngx_quic_secret_t server;
} ngx_quic_secrets_t;
struct ngx_quic_keys_s {
ngx_quic_secrets_t secrets[NGX_QUIC_ENCRYPTION_LAST];
ngx_quic_secrets_t next_key;
ngx_uint_t cipher;
};
typedef struct {
const ngx_quic_cipher_t *c;
const EVP_CIPHER *hp;
const EVP_MD *d;
} ngx_quic_ciphers_t;
typedef struct {
size_t out_len;
u_char *out;
size_t prk_len;
const uint8_t *prk;
size_t label_len;
const u_char *label;
} ngx_quic_hkdf_t;
#define ngx_quic_hkdf_set(seq, _label, _out, _prk) \
(seq)->out_len = (_out)->len; (seq)->out = (_out)->data; \
(seq)->prk_len = (_prk)->len, (seq)->prk = (_prk)->data, \
(seq)->label_len = (sizeof(_label) - 1); (seq)->label = (u_char *)(_label);
ngx_int_t ngx_quic_keys_set_initial_secret(ngx_quic_keys_t *keys,
ngx_str_t *secret, ngx_log_t *log);
ngx_int_t ngx_quic_keys_set_encryption_secret(ngx_log_t *log,
ngx_uint_t is_write, ngx_quic_keys_t *keys,
enum ssl_encryption_level_t level, const SSL_CIPHER *cipher,
const uint8_t *secret, size_t secret_len);
ngx_uint_t ngx_quic_keys_available(ngx_quic_keys_t *keys,
enum ssl_encryption_level_t level, ngx_uint_t is_write);
void ngx_quic_keys_discard(ngx_quic_keys_t *keys,
enum ssl_encryption_level_t level);
void ngx_quic_keys_switch(ngx_connection_t *c, ngx_quic_keys_t *keys);
void ngx_quic_keys_update(ngx_event_t *ev);
void ngx_quic_keys_cleanup(ngx_quic_keys_t *keys);
ngx_int_t ngx_quic_encrypt(ngx_quic_header_t *pkt, ngx_str_t *res);
ngx_int_t ngx_quic_decrypt(ngx_quic_header_t *pkt, uint64_t *largest_pn);
void ngx_quic_compute_nonce(u_char *nonce, size_t len, uint64_t pn);
ngx_int_t ngx_quic_ciphers(ngx_uint_t id, ngx_quic_ciphers_t *ciphers);
ngx_int_t ngx_quic_crypto_init(const ngx_quic_cipher_t *cipher,
ngx_quic_secret_t *s, ngx_quic_md_t *key, ngx_int_t enc, ngx_log_t *log);
ngx_int_t ngx_quic_crypto_seal(ngx_quic_secret_t *s, ngx_str_t *out,
u_char *nonce, ngx_str_t *in, ngx_str_t *ad, ngx_log_t *log);
void ngx_quic_crypto_cleanup(ngx_quic_secret_t *s);
ngx_int_t ngx_quic_hkdf_expand(ngx_quic_hkdf_t *hkdf, const EVP_MD *digest,
ngx_log_t *log);
#endif /* _NGX_EVENT_QUIC_PROTECTION_H_INCLUDED_ */