ssl/quic/quic_local.h

   1 /*
   2  * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #ifndef OSSL_QUIC_LOCAL_H
  11 # define OSSL_QUIC_LOCAL_H
  12
  13 # include <openssl/ssl.h>
  14 # include "internal/quic_ssl.h"       /* QUIC_CONNECTION */
  15 # include "internal/quic_txp.h"
  16 # include "internal/quic_statm.h"
  17 # include "internal/quic_demux.h"
  18 # include "internal/quic_record_rx.h"
  19 # include "internal/quic_tls.h"
  20 # include "internal/quic_fc.h"
  21 # include "internal/quic_stream.h"
  22 # include "internal/quic_channel.h"
  23 # include "internal/quic_reactor.h"
  24 # include "internal/quic_thread_assist.h"
  25 # include "../ssl_local.h"
  26
  27 # ifndef OPENSSL_NO_QUIC
  28
  29 /*
  30  * QUIC stream SSL object (QSSO) type. This implements the API personality layer
  31  * for QSSO objects, wrapping the QUIC-native QUIC_STREAM object and tracking
  32  * state required by the libssl API personality.
  33  */
  34 struct quic_xso_st {
  35     /* SSL object common header. */
  36     struct ssl_st                   ssl;
  37
  38     /* The connection this stream is associated with. Always non-NULL. */
  39     QUIC_CONNECTION                 *conn;
  40
  41     /* The stream object. Always non-NULL for as long as the XSO exists. */
  42     QUIC_STREAM                     *stream;
  43
  44     /* Is this stream in blocking mode? */
  45     unsigned int                    blocking                : 1;
  46
  47     /*
  48      * This state tracks SSL_write all-or-nothing (AON) write semantics
  49      * emulation.
  50      *
  51      * Example chronology:
  52      *
  53      *   t=0:  aon_write_in_progress=0
  54      *   t=1:  SSL_write(ssl, b1, l1) called;
  55      *         too big to enqueue into sstream at once, SSL_ERROR_WANT_WRITE;
  56      *         aon_write_in_progress=1; aon_buf_base=b1; aon_buf_len=l1;
  57      *         aon_buf_pos < l1 (depends on how much room was in sstream);
  58      *   t=2:  SSL_write(ssl, b2, l2);
  59      *         b2 must equal b1 (validated unless ACCEPT_MOVING_WRITE_BUFFER)
  60      *         l2 must equal l1 (always validated)
  61      *         append into sstream from [b2 + aon_buf_pos, b2 + aon_buf_len)
  62      *         if done, aon_write_in_progess=0
  63      *
  64      */
  65     /* Is an AON write in progress? */
  66     unsigned int                    aon_write_in_progress   : 1;
  67     /*
  68      * The base buffer pointer the caller passed us for the initial AON write
  69      * call. We use this for validation purposes unless
  70      * ACCEPT_MOVING_WRITE_BUFFER is enabled.
  71      *
  72      * NOTE: We never dereference this, as the caller might pass a different
  73      * (but identical) buffer if using ACCEPT_MOVING_WRITE_BUFFER. It is for
  74      * validation by pointer comparison only.
  75      */
  76     const unsigned char             *aon_buf_base;
  77     /* The total length of the AON buffer being sent, in bytes. */
  78     size_t                          aon_buf_len;
  79     /*
  80      * The position in the AON buffer up to which we have successfully sent data
  81      * so far.
  82      */
  83     size_t                          aon_buf_pos;
  84
  85     /* SSL_set_mode */
  86     uint32_t                        ssl_mode;
  87
  88     /*
  89      * Last 'normal' error during an app-level I/O operation, used by
  90      * SSL_get_error(); used to track data-path errors like SSL_ERROR_WANT_READ
  91      * and SSL_ERROR_WANT_WRITE.
  92      */
  93     int                             last_error;
  94 };
  95
  96 struct quic_conn_st {
  97     /*
  98      * ssl_st is a common header for ordinary SSL objects, QUIC connection
  99      * objects and QUIC stream objects, allowing objects of these different
 100      * types to be disambiguated at runtime and providing some common fields.
 101      *
 102      * Note: This must come first in the QUIC_CONNECTION structure.
 103      */
 104     struct ssl_st                   ssl;
 105
 106     SSL                             *tls;
 107
 108     /*
 109      * The QUIC channel providing the core QUIC connection implementation. Note
 110      * that this is not instantiated until we actually start trying to do the
 111      * handshake. This is to allow us to gather information like whether we are
 112      * going to be in client or server mode before committing to instantiating
 113      * the channel, since we want to determine the channel arguments based on
 114      * that.
 115      *
 116      * The channel remains available after connection termination until the SSL
 117      * object is freed, thus (ch != NULL) iff (started == 1).
 118      */
 119     QUIC_CHANNEL                    *ch;
 120
 121     /*
 122      * The mutex used to synchronise access to the QUIC_CHANNEL. We own this but
 123      * provide it to the channel.
 124      */
 125     CRYPTO_MUTEX                    *mutex;
 126
 127     /*
 128      * If we have a default stream attached, this is the internal XSO
 129      * object. If there is no default stream, this is NULL.
 130      */
 131     QUIC_XSO                        *default_xso;
 132
 133     /* The network read and write BIOs. */
 134     BIO                             *net_rbio, *net_wbio;
 135
 136     /* Initial peer L4 address. */
 137     BIO_ADDR                        init_peer_addr;
 138
 139 #  ifndef OPENSSL_NO_QUIC_THREAD_ASSIST
 140     /* Manages thread for QUIC thread assisted mode. */
 141     QUIC_THREAD_ASSIST              thread_assist;
 142 #  endif
 143
 144     /* If non-NULL, used instead of ossl_time_now(). Used for testing. */
 145     OSSL_TIME                       (*override_now_cb)(void *arg);
 146     void                            *override_now_cb_arg;
 147
 148     /* Number of XSOs allocated. Includes the default XSO, if any. */
 149     size_t                          num_xso;
 150
 151     /* Have we started? */
 152     unsigned int                    started                 : 1;
 153
 154     /* Can the read and write network BIOs support blocking? */
 155     unsigned int                    can_poll_net_rbio       : 1;
 156     unsigned int                    can_poll_net_wbio       : 1;
 157
 158     /*
 159      * This is 1 if we were instantiated using a QUIC server method
 160      * (for future use).
 161      */
 162     unsigned int                    as_server               : 1;
 163
 164     /*
 165      * Has the application called SSL_set_accept_state? We require this to be
 166      * congruent with the value of as_server.
 167      */
 168     unsigned int                    as_server_state         : 1;
 169
 170     /* Are we using thread assisted mode? Never changes after init. */
 171     unsigned int                    is_thread_assisted      : 1;
 172
 173     /* Do connection-level operations (e.g. handshakes) run in blocking mode? */
 174     unsigned int                    blocking                : 1;
 175
 176     /* Do newly created streams start in blocking mode? Inherited by new XSOs. */
 177     unsigned int                    default_blocking        : 1;
 178
 179     /* Have we created a default XSO yet? */
 180     unsigned int                    default_xso_created     : 1;
 181
 182     /* Default stream type. Defaults to SSL_DEFAULT_STREAM_MODE_AUTO_BIDI. */
 183     uint32_t                        default_stream_mode;
 184
 185     /* SSL_set_mode. This is not used directly but inherited by new XSOs. */
 186     uint32_t                        default_ssl_mode;
 187
 188     /* SSL_set_incoming_stream_policy. */
 189     int                             incoming_stream_policy;
 190     uint64_t                        incoming_stream_aec;
 191
 192     /*
 193      * Last 'normal' error during an app-level I/O operation, used by
 194      * SSL_get_error(); used to track data-path errors like SSL_ERROR_WANT_READ
 195      * and SSL_ERROR_WANT_WRITE.
 196      */
 197     int                             last_error;
 198
 199     /* Message callback related arguments */
 200     ossl_msg_cb                     msg_callback;
 201     void                            *msg_callback_arg;
 202     SSL                             *msg_callback_s;
 203 };
 204
 205 /* Internal calls to the QUIC CSM which come from various places. */
 206 int ossl_quic_conn_on_handshake_confirmed(QUIC_CONNECTION *qc);
 207
 208 /*
 209  * To be called when a protocol violation occurs. The connection is torn down
 210  * with the given error code, which should be a QUIC_ERR_* value. Reason string
 211  * is optional and copied if provided. frame_type should be 0 if not applicable.
 212  */
 213 void ossl_quic_conn_raise_protocol_error(QUIC_CONNECTION *qc,
 214                                          uint64_t error_code,
 215                                          uint64_t frame_type,
 216                                          const char *reason);
 217
 218 void ossl_quic_conn_on_remote_conn_close(QUIC_CONNECTION *qc,
 219                                          OSSL_QUIC_FRAME_CONN_CLOSE *f);
 220
 221 int ossl_quic_trace(int write_p, int version, int content_type,
 222                     const void *buf, size_t msglen, SSL *ssl, void *arg);
 223
 224 #  define OSSL_QUIC_ANY_VERSION 0xFFFFF
 225
 226 #  define QUIC_CONNECTION_FROM_SSL_int(ssl, c)   \
 227      ((ssl) == NULL ? NULL                       \
 228       : ((ssl)->type == SSL_TYPE_QUIC_CONNECTION \
 229          ? (c QUIC_CONNECTION *)(ssl)            \
 230          : NULL))
 231
 232 #  define QUIC_XSO_FROM_SSL_int(ssl, c)                             \
 233     ((ssl) == NULL                                                  \
 234      ? NULL                                                         \
 235      : (((ssl)->type == SSL_TYPE_QUIC_XSO                           \
 236         ? (c QUIC_XSO *)(ssl)                                       \
 237         : ((ssl)->type == SSL_TYPE_QUIC_CONNECTION                  \
 238            ? (c QUIC_XSO *)((QUIC_CONNECTION *)(ssl))->default_xso  \
 239            : NULL))))
 240
 241 #  define SSL_CONNECTION_FROM_QUIC_SSL_int(ssl, c)               \
 242      ((ssl) == NULL ? NULL                                       \
 243       : ((ssl)->type == SSL_TYPE_QUIC_CONNECTION                 \
 244          ? (c SSL_CONNECTION *)((c QUIC_CONNECTION *)(ssl))->tls \
 245          : NULL))
 246
 247 #  define IS_QUIC(ssl) ((ssl) != NULL                                   \
 248                         && ((ssl)->type == SSL_TYPE_QUIC_CONNECTION     \
 249                             || (ssl)->type == SSL_TYPE_QUIC_XSO))
 250 # else
 251 #  define QUIC_CONNECTION_FROM_SSL_int(ssl, c) NULL
 252 #  define QUIC_XSO_FROM_SSL_int(ssl, c) NULL
 253 #  define SSL_CONNECTION_FROM_QUIC_SSL_int(ssl, c) NULL
 254 #  define IS_QUIC(ssl) 0
 255 # endif
 256
 257 # define QUIC_CONNECTION_FROM_SSL(ssl) \
 258     QUIC_CONNECTION_FROM_SSL_int(ssl, SSL_CONNECTION_NO_CONST)
 259 # define QUIC_CONNECTION_FROM_CONST_SSL(ssl) \
 260     QUIC_CONNECTION_FROM_SSL_int(ssl, const)
 261 # define QUIC_XSO_FROM_SSL(ssl) \
 262     QUIC_XSO_FROM_SSL_int(ssl, SSL_CONNECTION_NO_CONST)
 263 # define QUIC_XSO_FROM_CONST_SSL(ssl) \
 264     QUIC_XSO_FROM_SSL_int(ssl, const)
 265 # define SSL_CONNECTION_FROM_QUIC_SSL(ssl) \
 266     SSL_CONNECTION_FROM_QUIC_SSL_int(ssl, SSL_CONNECTION_NO_CONST)
 267 # define SSL_CONNECTION_FROM_CONST_QUIC_SSL(ssl) \
 268     SSL_CONNECTION_FROM_CONST_QUIC_SSL_int(ssl, const)
 269
 270 # define IMPLEMENT_quic_meth_func(version, func_name, q_accept, \
 271                                  q_connect, enc_data) \
 272 const SSL_METHOD *func_name(void)  \
 273         { \
 274         static const SSL_METHOD func_name##_data= { \
 275                 version, \
 276                 0, \
 277                 0, \
 278                 ossl_quic_new, \
 279                 ossl_quic_free, \
 280                 ossl_quic_reset, \
 281                 ossl_quic_init, \
 282                 ossl_quic_clear, \
 283                 ossl_quic_deinit, \
 284                 q_accept, \
 285                 q_connect, \
 286                 ossl_quic_read, \
 287                 ossl_quic_peek, \
 288                 ossl_quic_write, \
 289                 NULL /* shutdown */, \
 290                 NULL /* renegotiate */, \
 291                 ossl_quic_renegotiate_check, \
 292                 NULL /* read_bytes */, \
 293                 NULL /* write_bytes */, \
 294                 NULL /* dispatch_alert */, \
 295                 ossl_quic_ctrl, \
 296                 ossl_quic_ctx_ctrl, \
 297                 NULL /* get_cipher_by_char */, \
 298                 NULL /* put_cipher_by_char */, \
 299                 ossl_quic_pending, \
 300                 ossl_quic_num_ciphers, \
 301                 ossl_quic_get_cipher, \
 302                 tls1_default_timeout, \
 303                 &enc_data, \
 304                 ssl_undefined_void_function, \
 305                 ossl_quic_callback_ctrl, \
 306                 ossl_quic_ctx_callback_ctrl, \
 307         }; \
 308         return &func_name##_data; \
 309         }
 310
 311 #endif