diff options
Diffstat (limited to 'ssl/s3_msg.c')
-rw-r--r-- | ssl/s3_msg.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/ssl/s3_msg.c b/ssl/s3_msg.c new file mode 100644 index 0000000000..8fc92c1d47 --- /dev/null +++ b/ssl/s3_msg.c @@ -0,0 +1,226 @@ +/* ssl/s3_msg.c */ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ +/* ==================================================================== + * Copyright (c) 1998-2015 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#define USE_SOCKETS +#include "ssl_locl.h" + +int ssl3_do_change_cipher_spec(SSL *s) +{ + int i; + const char *sender; + int slen; + + if (s->state & SSL_ST_ACCEPT) + i = SSL3_CHANGE_CIPHER_SERVER_READ; + else + i = SSL3_CHANGE_CIPHER_CLIENT_READ; + + if (s->s3->tmp.key_block == NULL) { + if (s->session == NULL || s->session->master_key_length == 0) { + /* might happen if dtls1_read_bytes() calls this */ + SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC, + SSL_R_CCS_RECEIVED_EARLY); + return (0); + } + + s->session->cipher = s->s3->tmp.new_cipher; + if (!s->method->ssl3_enc->setup_key_block(s)) + return (0); + } + + if (!s->method->ssl3_enc->change_cipher_state(s, i)) + return (0); + + /* + * we have to record the message digest at this point so we can get it + * before we read the finished message + */ + if (s->state & SSL_ST_CONNECT) { + sender = s->method->ssl3_enc->server_finished_label; + slen = s->method->ssl3_enc->server_finished_label_len; + } else { + sender = s->method->ssl3_enc->client_finished_label; + slen = s->method->ssl3_enc->client_finished_label_len; + } + + i = s->method->ssl3_enc->final_finish_mac(s, + sender, slen, + s->s3->tmp.peer_finish_md); + if (i == 0) { + SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR); + return 0; + } + s->s3->tmp.peer_finish_md_len = i; + + return (1); +} + +int ssl3_send_alert(SSL *s, int level, int desc) +{ + /* Map tls/ssl alert value to correct one */ + desc = s->method->ssl3_enc->alert_value(desc); + if (s->version == SSL3_VERSION && desc == SSL_AD_PROTOCOL_VERSION) + desc = SSL_AD_HANDSHAKE_FAILURE; /* SSL 3.0 does not have + * protocol_version alerts */ + if (desc < 0) + return -1; + /* If a fatal one, remove from cache */ + if ((level == SSL3_AL_FATAL) && (s->session != NULL)) + SSL_CTX_remove_session(s->ctx, s->session); + + s->s3->alert_dispatch = 1; + s->s3->send_alert[0] = level; + s->s3->send_alert[1] = desc; + if (SSL3_BUFFER_get_left(RECORD_LAYER_get_wbuf(&s->rlayer)) == 0) { + /* data still being written out? */ + return s->method->ssl_dispatch_alert(s); + } + /* + * else data is still being written out, we will get written some time in + * the future + */ + return -1; +} + +int ssl3_dispatch_alert(SSL *s) +{ + int i, j; + void (*cb) (const SSL *ssl, int type, int val) = NULL; + + s->s3->alert_dispatch = 0; + i = do_ssl3_write(s, SSL3_RT_ALERT, &s->s3->send_alert[0], 2, 0); + if (i <= 0) { + s->s3->alert_dispatch = 1; + } else { + /* + * Alert sent to BIO. If it is important, flush it now. If the + * message does not get sent due to non-blocking IO, we will not + * worry too much. + */ + if (s->s3->send_alert[0] == SSL3_AL_FATAL) + (void)BIO_flush(s->wbio); + + if (s->msg_callback) + s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert, + 2, s, s->msg_callback_arg); + + if (s->info_callback != NULL) + cb = s->info_callback; + else if (s->ctx->info_callback != NULL) + cb = s->ctx->info_callback; + + if (cb != NULL) { + j = (s->s3->send_alert[0] << 8) | s->s3->send_alert[1]; + cb(s, SSL_CB_WRITE_ALERT, j); + } + } + return (i); +} |