Mercurial > hg > nginx
view src/event/quic/ngx_event_quic_tokens.h @ 9189:fcec773dd249
QUIC: avoid partial expansion of PATH_CHALLENGE/PATH_RESPONSE.
By default packets with these frames are expanded to 1200 bytes. Previously,
if anti-amplification limit did not allow this expansion, it was limited to
whatever size was allowed. However RFC 9000 clearly states no partial
expansion should happen in both cases.
Section 8.2.1. Initiating Path Validation:
An endpoint MUST expand datagrams that contain a PATH_CHALLENGE frame
to at least the smallest allowed maximum datagram size of 1200 bytes,
unless the anti-amplification limit for the path does not permit
sending a datagram of this size.
Section 8.2.2. Path Validation Responses:
An endpoint MUST expand datagrams that contain a PATH_RESPONSE frame
to at least the smallest allowed maximum datagram size of 1200 bytes.
...
However, an endpoint MUST NOT expand the datagram containing the
PATH_RESPONSE if the resulting data exceeds the anti-amplification limit.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Wed, 29 Nov 2023 18:13:25 +0400 |
parents | 77c1418916f7 |
children |
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/* * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_QUIC_TOKENS_H_INCLUDED_ #define _NGX_EVENT_QUIC_TOKENS_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #define NGX_QUIC_MAX_TOKEN_SIZE 64 /* SHA-1(addr)=20 + sizeof(time_t) + retry(1) + odcid.len(1) + odcid */ #define NGX_QUIC_AES_256_GCM_IV_LEN 12 #define NGX_QUIC_AES_256_GCM_TAG_LEN 16 #define NGX_QUIC_TOKEN_BUF_SIZE (NGX_QUIC_AES_256_GCM_IV_LEN \ + NGX_QUIC_MAX_TOKEN_SIZE \ + NGX_QUIC_AES_256_GCM_TAG_LEN) ngx_int_t ngx_quic_new_sr_token(ngx_connection_t *c, ngx_str_t *cid, u_char *secret, u_char *token); ngx_int_t ngx_quic_new_token(ngx_log_t *log, struct sockaddr *sockaddr, socklen_t socklen, u_char *key, ngx_str_t *token, ngx_str_t *odcid, time_t expires, ngx_uint_t is_retry); ngx_int_t ngx_quic_validate_token(ngx_connection_t *c, u_char *key, ngx_quic_header_t *pkt); #endif /* _NGX_EVENT_QUIC_TOKENS_H_INCLUDED_ */