1 | /*
|
---|
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
|
---|
3 | *
|
---|
4 | * Licensed under the OpenSSL license (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 | #define USE_SOCKETS
|
---|
11 | #include "ssl_locl.h"
|
---|
12 |
|
---|
13 | int ssl3_do_change_cipher_spec(SSL *s)
|
---|
14 | {
|
---|
15 | int i;
|
---|
16 | const char *sender;
|
---|
17 | int slen;
|
---|
18 |
|
---|
19 | if (s->server)
|
---|
20 | i = SSL3_CHANGE_CIPHER_SERVER_READ;
|
---|
21 | else
|
---|
22 | i = SSL3_CHANGE_CIPHER_CLIENT_READ;
|
---|
23 |
|
---|
24 | if (s->s3->tmp.key_block == NULL) {
|
---|
25 | if (s->session == NULL || s->session->master_key_length == 0) {
|
---|
26 | /* might happen if dtls1_read_bytes() calls this */
|
---|
27 | SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC, SSL_R_CCS_RECEIVED_EARLY);
|
---|
28 | return (0);
|
---|
29 | }
|
---|
30 |
|
---|
31 | s->session->cipher = s->s3->tmp.new_cipher;
|
---|
32 | if (!s->method->ssl3_enc->setup_key_block(s))
|
---|
33 | return (0);
|
---|
34 | }
|
---|
35 |
|
---|
36 | if (!s->method->ssl3_enc->change_cipher_state(s, i))
|
---|
37 | return (0);
|
---|
38 |
|
---|
39 | /*
|
---|
40 | * we have to record the message digest at this point so we can get it
|
---|
41 | * before we read the finished message
|
---|
42 | */
|
---|
43 | if (!s->server) {
|
---|
44 | sender = s->method->ssl3_enc->server_finished_label;
|
---|
45 | slen = s->method->ssl3_enc->server_finished_label_len;
|
---|
46 | } else {
|
---|
47 | sender = s->method->ssl3_enc->client_finished_label;
|
---|
48 | slen = s->method->ssl3_enc->client_finished_label_len;
|
---|
49 | }
|
---|
50 |
|
---|
51 | i = s->method->ssl3_enc->final_finish_mac(s,
|
---|
52 | sender, slen,
|
---|
53 | s->s3->tmp.peer_finish_md);
|
---|
54 | if (i == 0) {
|
---|
55 | SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR);
|
---|
56 | return 0;
|
---|
57 | }
|
---|
58 | s->s3->tmp.peer_finish_md_len = i;
|
---|
59 |
|
---|
60 | return (1);
|
---|
61 | }
|
---|
62 |
|
---|
63 | int ssl3_send_alert(SSL *s, int level, int desc)
|
---|
64 | {
|
---|
65 | /* Map tls/ssl alert value to correct one */
|
---|
66 | desc = s->method->ssl3_enc->alert_value(desc);
|
---|
67 | if (s->version == SSL3_VERSION && desc == SSL_AD_PROTOCOL_VERSION)
|
---|
68 | desc = SSL_AD_HANDSHAKE_FAILURE; /* SSL 3.0 does not have
|
---|
69 | * protocol_version alerts */
|
---|
70 | if (desc < 0)
|
---|
71 | return -1;
|
---|
72 | /* If a fatal one, remove from cache */
|
---|
73 | if ((level == SSL3_AL_FATAL) && (s->session != NULL))
|
---|
74 | SSL_CTX_remove_session(s->session_ctx, s->session);
|
---|
75 |
|
---|
76 | s->s3->alert_dispatch = 1;
|
---|
77 | s->s3->send_alert[0] = level;
|
---|
78 | s->s3->send_alert[1] = desc;
|
---|
79 | if (!RECORD_LAYER_write_pending(&s->rlayer)) {
|
---|
80 | /* data still being written out? */
|
---|
81 | return s->method->ssl_dispatch_alert(s);
|
---|
82 | }
|
---|
83 | /*
|
---|
84 | * else data is still being written out, we will get written some time in
|
---|
85 | * the future
|
---|
86 | */
|
---|
87 | return -1;
|
---|
88 | }
|
---|
89 |
|
---|
90 | int ssl3_dispatch_alert(SSL *s)
|
---|
91 | {
|
---|
92 | int i, j;
|
---|
93 | unsigned int alertlen;
|
---|
94 | void (*cb) (const SSL *ssl, int type, int val) = NULL;
|
---|
95 |
|
---|
96 | s->s3->alert_dispatch = 0;
|
---|
97 | alertlen = 2;
|
---|
98 | i = do_ssl3_write(s, SSL3_RT_ALERT, &s->s3->send_alert[0], &alertlen, 1, 0);
|
---|
99 | if (i <= 0) {
|
---|
100 | s->s3->alert_dispatch = 1;
|
---|
101 | } else {
|
---|
102 | /*
|
---|
103 | * Alert sent to BIO. If it is important, flush it now. If the
|
---|
104 | * message does not get sent due to non-blocking IO, we will not
|
---|
105 | * worry too much.
|
---|
106 | */
|
---|
107 | if (s->s3->send_alert[0] == SSL3_AL_FATAL)
|
---|
108 | (void)BIO_flush(s->wbio);
|
---|
109 |
|
---|
110 | if (s->msg_callback)
|
---|
111 | s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert,
|
---|
112 | 2, s, s->msg_callback_arg);
|
---|
113 |
|
---|
114 | if (s->info_callback != NULL)
|
---|
115 | cb = s->info_callback;
|
---|
116 | else if (s->ctx->info_callback != NULL)
|
---|
117 | cb = s->ctx->info_callback;
|
---|
118 |
|
---|
119 | if (cb != NULL) {
|
---|
120 | j = (s->s3->send_alert[0] << 8) | s->s3->send_alert[1];
|
---|
121 | cb(s, SSL_CB_WRITE_ALERT, j);
|
---|
122 | }
|
---|
123 | }
|
---|
124 | return (i);
|
---|
125 | }
|
---|