ssl/d1_msg.c

   1 /*
   2  * Copyright 2005-2023 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 #include "ssl_local.h"
  11
  12 int dtls1_write_app_data_bytes(SSL *s, uint8_t type, const void *buf_,
  13                                size_t len, size_t *written)
  14 {
  15     int i;
  16     SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL_ONLY(s);
  17
  18     if (sc == NULL)
  19         return -1;
  20
  21     if (SSL_in_init(s) && !ossl_statem_get_in_handshake(sc)) {
  22         i = sc->handshake_func(s);
  23         if (i < 0)
  24             return i;
  25         if (i == 0) {
  26             ERR_raise(ERR_LIB_SSL, SSL_R_SSL_HANDSHAKE_FAILURE);
  27             return -1;
  28         }
  29     }
  30
  31     if (len > SSL3_RT_MAX_PLAIN_LENGTH) {
  32         ERR_raise(ERR_LIB_SSL, SSL_R_DTLS_MESSAGE_TOO_BIG);
  33         return -1;
  34     }
  35
  36     return dtls1_write_bytes(sc, type, buf_, len, written);
  37 }
  38
  39 int dtls1_dispatch_alert(SSL *ssl)
  40 {
  41     int i, j;
  42     void (*cb) (const SSL *ssl, int type, int val) = NULL;
  43     unsigned char buf[DTLS1_AL_HEADER_LENGTH];
  44     unsigned char *ptr = &buf[0];
  45     size_t written;
  46     SSL_CONNECTION *s = SSL_CONNECTION_FROM_SSL_ONLY(ssl);
  47
  48     if (s == NULL)
  49         return 0;
  50
  51     s->s3.alert_dispatch = SSL_ALERT_DISPATCH_NONE;
  52
  53     memset(buf, 0, sizeof(buf));
  54     *ptr++ = s->s3.send_alert[0];
  55     *ptr++ = s->s3.send_alert[1];
  56
  57     i = do_dtls1_write(s, SSL3_RT_ALERT, &buf[0], sizeof(buf), &written);
  58     if (i <= 0) {
  59         s->s3.alert_dispatch = 1;
  60         /* fprintf(stderr, "not done with alert\n"); */
  61     } else {
  62         (void)BIO_flush(s->wbio);
  63
  64         if (s->msg_callback)
  65             s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3.send_alert,
  66                             2, ssl, s->msg_callback_arg);
  67
  68         if (s->info_callback != NULL)
  69             cb = s->info_callback;
  70         else if (ssl->ctx->info_callback != NULL)
  71             cb = ssl->ctx->info_callback;
  72
  73         if (cb != NULL) {
  74             j = (s->s3.send_alert[0] << 8) | s->s3.send_alert[1];
  75             cb(ssl, SSL_CB_WRITE_ALERT, j);
  76         }
  77     }
  78     return i;
  79 }