1 /* 2 * Copyright 1995-2018 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 #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 SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC, 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 return 0; 31 } 32 33 if (!s->method->ssl3_enc->change_cipher_state(s, i)) 34 return 0; 35 36 return 1; 37 } 38 39 int ssl3_send_alert(SSL *s, int level, int desc) 40 { 41 /* Map tls/ssl alert value to correct one */ 42 if (SSL_TREAT_AS_TLS13(s)) 43 desc = tls13_alert_code(desc); 44 else 45 desc = s->method->ssl3_enc->alert_value(desc); 46 if (s->version == SSL3_VERSION && desc == SSL_AD_PROTOCOL_VERSION) 47 desc = SSL_AD_HANDSHAKE_FAILURE; /* SSL 3.0 does not have 48 * protocol_version alerts */ 49 if (desc < 0) 50 return -1; 51 /* If a fatal one, remove from cache */ 52 if ((level == SSL3_AL_FATAL) && (s->session != NULL)) 53 SSL_CTX_remove_session(s->session_ctx, s->session); 54 55 s->s3->alert_dispatch = 1; 56 s->s3->send_alert[0] = level; 57 s->s3->send_alert[1] = desc; 58 if (!RECORD_LAYER_write_pending(&s->rlayer)) { 59 /* data still being written out? */ 60 return s->method->ssl_dispatch_alert(s); 61 } 62 /* 63 * else data is still being written out, we will get written some time in 64 * the future 65 */ 66 return -1; 67 } 68 69 int ssl3_dispatch_alert(SSL *s) 70 { 71 int i, j; 72 size_t alertlen; 73 void (*cb) (const SSL *ssl, int type, int val) = NULL; 74 size_t written; 75 76 s->s3->alert_dispatch = 0; 77 alertlen = 2; 78 i = do_ssl3_write(s, SSL3_RT_ALERT, &s->s3->send_alert[0], &alertlen, 1, 0, 79 &written); 80 if (i <= 0) { 81 s->s3->alert_dispatch = 1; 82 } else { 83 /* 84 * Alert sent to BIO - now flush. If the message does not get sent due 85 * to non-blocking IO, we will not worry too much. 86 */ 87 (void)BIO_flush(s->wbio); 88 89 if (s->msg_callback) 90 s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert, 91 2, s, s->msg_callback_arg); 92 93 if (s->info_callback != NULL) 94 cb = s->info_callback; 95 else if (s->ctx->info_callback != NULL) 96 cb = s->ctx->info_callback; 97 98 if (cb != NULL) { 99 j = (s->s3->send_alert[0] << 8) | s->s3->send_alert[1]; 100 cb(s, SSL_CB_WRITE_ALERT, j); 101 } 102 } 103 return i; 104 } 105