1 /* 2 * Copyright 1995-2021 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 ssl3_do_change_cipher_spec(SSL *s) 13 { 14 int i; 15 16 if (s->server) 17 i = SSL3_CHANGE_CIPHER_SERVER_READ; 18 else 19 i = SSL3_CHANGE_CIPHER_CLIENT_READ; 20 21 if (s->s3.tmp.key_block == NULL) { 22 if (s->session == NULL || s->session->master_key_length == 0) { 23 /* might happen if dtls1_read_bytes() calls this */ 24 ERR_raise(ERR_LIB_SSL, SSL_R_CCS_RECEIVED_EARLY); 25 return 0; 26 } 27 28 s->session->cipher = s->s3.tmp.new_cipher; 29 if (!s->method->ssl3_enc->setup_key_block(s)) { 30 /* SSLfatal() already called */ 31 return 0; 32 } 33 } 34 35 if (!s->method->ssl3_enc->change_cipher_state(s, i)) { 36 /* SSLfatal() already called */ 37 return 0; 38 } 39 40 return 1; 41 } 42 43 int ssl3_send_alert(SSL *s, int level, int desc) 44 { 45 /* Map tls/ssl alert value to correct one */ 46 if (SSL_TREAT_AS_TLS13(s)) 47 desc = tls13_alert_code(desc); 48 else 49 desc = s->method->ssl3_enc->alert_value(desc); 50 if (s->version == SSL3_VERSION && desc == SSL_AD_PROTOCOL_VERSION) 51 desc = SSL_AD_HANDSHAKE_FAILURE; /* SSL 3.0 does not have 52 * protocol_version alerts */ 53 if (desc < 0) 54 return -1; 55 if (s->shutdown & SSL_SENT_SHUTDOWN && desc != SSL_AD_CLOSE_NOTIFY) 56 return -1; 57 /* If a fatal one, remove from cache */ 58 if ((level == SSL3_AL_FATAL) && (s->session != NULL)) 59 SSL_CTX_remove_session(s->session_ctx, s->session); 60 61 s->s3.alert_dispatch = 1; 62 s->s3.send_alert[0] = level; 63 s->s3.send_alert[1] = desc; 64 if (!RECORD_LAYER_write_pending(&s->rlayer)) { 65 /* data still being written out? */ 66 return s->method->ssl_dispatch_alert(s); 67 } 68 /* 69 * else data is still being written out, we will get written some time in 70 * the future 71 */ 72 return -1; 73 } 74 75 int ssl3_dispatch_alert(SSL *s) 76 { 77 int i, j; 78 size_t alertlen; 79 void (*cb) (const SSL *ssl, int type, int val) = NULL; 80 size_t written; 81 82 s->s3.alert_dispatch = 0; 83 alertlen = 2; 84 i = do_ssl3_write(s, SSL3_RT_ALERT, &s->s3.send_alert[0], &alertlen, 1, 0, 85 &written); 86 if (i <= 0) { 87 s->s3.alert_dispatch = 1; 88 } else { 89 /* 90 * Alert sent to BIO - now flush. If the message does not get sent due 91 * to non-blocking IO, we will not worry too much. 92 */ 93 (void)BIO_flush(s->wbio); 94 95 if (s->msg_callback) 96 s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3.send_alert, 97 2, s, s->msg_callback_arg); 98 99 if (s->info_callback != NULL) 100 cb = s->info_callback; 101 else if (s->ctx->info_callback != NULL) 102 cb = s->ctx->info_callback; 103 104 if (cb != NULL) { 105 j = (s->s3.send_alert[0] << 8) | s->s3.send_alert[1]; 106 cb(s, SSL_CB_WRITE_ALERT, j); 107 } 108 } 109 return i; 110 } 111