mirror of https://github.com/openssl/openssl.git
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#define USE_SOCKETS
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#include "ssl_locl.h"
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int ssl3_do_change_cipher_spec(SSL *s)
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{
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int i;
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const char *sender;
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int slen;
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if (s->server)
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i = SSL3_CHANGE_CIPHER_SERVER_READ;
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else
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i = SSL3_CHANGE_CIPHER_CLIENT_READ;
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if (s->s3->tmp.key_block == NULL) {
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if (s->session == NULL || s->session->master_key_length == 0) {
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/* might happen if dtls1_read_bytes() calls this */
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SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC,
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SSL_R_CCS_RECEIVED_EARLY);
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return (0);
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}
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s->session->cipher = s->s3->tmp.new_cipher;
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if (!s->method->ssl3_enc->setup_key_block(s))
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return (0);
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}
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if (!s->method->ssl3_enc->change_cipher_state(s, i))
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return (0);
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/*
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* we have to record the message digest at this point so we can get it
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* before we read the finished message
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*/
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if (!s->server) {
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sender = s->method->ssl3_enc->server_finished_label;
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slen = s->method->ssl3_enc->server_finished_label_len;
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} else {
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sender = s->method->ssl3_enc->client_finished_label;
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slen = s->method->ssl3_enc->client_finished_label_len;
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}
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i = s->method->ssl3_enc->final_finish_mac(s,
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sender, slen,
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s->s3->tmp.peer_finish_md);
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if (i == 0) {
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SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR);
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return 0;
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}
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s->s3->tmp.peer_finish_md_len = i;
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return (1);
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}
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int ssl3_send_alert(SSL *s, int level, int desc)
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{
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/* Map tls/ssl alert value to correct one */
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desc = s->method->ssl3_enc->alert_value(desc);
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if (s->version == SSL3_VERSION && desc == SSL_AD_PROTOCOL_VERSION)
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desc = SSL_AD_HANDSHAKE_FAILURE; /* SSL 3.0 does not have
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* protocol_version alerts */
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if (desc < 0)
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return -1;
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/* If a fatal one, remove from cache */
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if ((level == SSL3_AL_FATAL) && (s->session != NULL))
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SSL_CTX_remove_session(s->session_ctx, s->session);
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s->s3->alert_dispatch = 1;
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s->s3->send_alert[0] = level;
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s->s3->send_alert[1] = desc;
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if (!RECORD_LAYER_write_pending(&s->rlayer)) {
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/* data still being written out? */
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return s->method->ssl_dispatch_alert(s);
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}
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/*
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* else data is still being written out, we will get written some time in
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* the future
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*/
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return -1;
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}
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int ssl3_dispatch_alert(SSL *s)
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{
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int i, j;
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unsigned int alertlen;
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void (*cb) (const SSL *ssl, int type, int val) = NULL;
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s->s3->alert_dispatch = 0;
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alertlen = 2;
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i = do_ssl3_write(s, SSL3_RT_ALERT, &s->s3->send_alert[0], &alertlen, 1, 0);
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if (i <= 0) {
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s->s3->alert_dispatch = 1;
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} else {
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/*
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* Alert sent to BIO. If it is important, flush it now. If the
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* message does not get sent due to non-blocking IO, we will not
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* worry too much.
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*/
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if (s->s3->send_alert[0] == SSL3_AL_FATAL)
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(void)BIO_flush(s->wbio);
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if (s->msg_callback)
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s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert,
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2, s, s->msg_callback_arg);
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if (s->info_callback != NULL)
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cb = s->info_callback;
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else if (s->ctx->info_callback != NULL)
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cb = s->ctx->info_callback;
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if (cb != NULL) {
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j = (s->s3->send_alert[0] << 8) | s->s3->send_alert[1];
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cb(s, SSL_CB_WRITE_ALERT, j);
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}
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}
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return (i);
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}
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