diff options
Diffstat (limited to 'lib/libssl/s23_srvr.c')
| -rw-r--r-- | lib/libssl/s23_srvr.c | 466 |
1 files changed, 0 insertions, 466 deletions
diff --git a/lib/libssl/s23_srvr.c b/lib/libssl/s23_srvr.c deleted file mode 100644 index 1cd6721d1fe..00000000000 --- a/lib/libssl/s23_srvr.c +++ /dev/null @@ -1,466 +0,0 @@ -/* $OpenBSD: s23_srvr.c,v 1.57 2017/01/23 14:35:42 jsing Exp $ */ -/* 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) 1998-2006 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). - * - */ - -#include <stdio.h> - -#include "ssl_locl.h" - -#include <openssl/buffer.h> -#include <openssl/evp.h> -#include <openssl/objects.h> - -static int ssl23_get_client_hello(SSL *s); - -int -ssl23_accept(SSL *s) -{ - void (*cb)(const SSL *ssl, int type, int val) = NULL; - int ret = -1; - int new_state, state; - - ERR_clear_error(); - errno = 0; - - if (s->internal->info_callback != NULL) - cb = s->internal->info_callback; - else if (s->ctx->internal->info_callback != NULL) - cb = s->ctx->internal->info_callback; - - s->internal->in_handshake++; - if (!SSL_in_init(s) || SSL_in_before(s)) - SSL_clear(s); - - for (;;) { - state = s->internal->state; - - switch (s->internal->state) { - case SSL_ST_BEFORE: - case SSL_ST_ACCEPT: - case SSL_ST_BEFORE|SSL_ST_ACCEPT: - case SSL_ST_OK|SSL_ST_ACCEPT: - - s->server = 1; - if (cb != NULL) - cb(s, SSL_CB_HANDSHAKE_START, 1); - - /* s->version=SSL3_VERSION; */ - s->internal->type = SSL_ST_ACCEPT; - - if (!ssl3_setup_init_buffer(s)) { - ret = -1; - goto end; - } - if (!tls1_init_finished_mac(s)) { - ret = -1; - goto end; - } - - s->internal->state = SSL23_ST_SR_CLNT_HELLO_A; - s->ctx->internal->stats.sess_accept++; - s->internal->init_num = 0; - break; - - case SSL23_ST_SR_CLNT_HELLO_A: - case SSL23_ST_SR_CLNT_HELLO_B: - - s->internal->shutdown = 0; - ret = ssl23_get_client_hello(s); - if (ret >= 0) - cb = NULL; - goto end; - /* break; */ - - default: - SSLerr(SSL_F_SSL23_ACCEPT, SSL_R_UNKNOWN_STATE); - ret = -1; - goto end; - /* break; */ - } - - if ((cb != NULL) && (s->internal->state != state)) { - new_state = s->internal->state; - s->internal->state = state; - cb(s, SSL_CB_ACCEPT_LOOP, 1); - s->internal->state = new_state; - } - } - -end: - s->internal->in_handshake--; - if (cb != NULL) - cb(s, SSL_CB_ACCEPT_EXIT, ret); - - return (ret); -} - - -int -ssl23_get_client_hello(SSL *s) -{ - char buf[11]; - /* - * sizeof(buf) == 11, because we'll need to request this many bytes in - * the initial read. - * We can detect SSL 3.0/TLS 1.0 Client Hellos ('type == 3') correctly - * only when the following is in a single record, which is not - * guaranteed by the protocol specification: - * Byte Content - * 0 type \ - * 1/2 version > record header - * 3/4 length / - * 5 msg_type \ - * 6-8 length > Client Hello message - * 9/10 client_version / - */ - uint16_t client_version = 0; - uint16_t shared_version; - unsigned char *p, *d, *d_len, *dd; - unsigned int i; - unsigned int csl, sil, cl; - int n = 0, j; - int type = 0; - - if (s->internal->state == SSL23_ST_SR_CLNT_HELLO_A) { - /* read the initial header */ - if (!ssl3_setup_buffers(s)) - return -1; - - n = ssl23_read_bytes(s, sizeof buf); - if (n != sizeof buf) - return(n); - - p = s->internal->packet; - - memcpy(buf, p, n); - - if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO)) { - /* - * SSLv2 header - */ - client_version = p[3] << 8 | p[4]; - - if (!ssl_max_shared_version(s, client_version, - &shared_version)) - goto unsupported; - - s->version = shared_version; - s->internal->state = SSL23_ST_SR_CLNT_HELLO_B; - } else if ((p[0] == SSL3_RT_HANDSHAKE) && - (p[1] == SSL3_VERSION_MAJOR) && - (p[5] == SSL3_MT_CLIENT_HELLO) && - ((p[3] == 0 && p[4] < 5 /* silly record length? */) || - (p[9] >= p[1]))) { - /* - * SSLv3 or tls1 header - */ - - /* We must look at client_version inside the Client Hello message - * to get the correct minor version. - * However if we have only a pathologically small fragment of the - * Client Hello message, this would be difficult, and we'd have - * to read more records to find out. - * No known SSL 3.0 client fragments ClientHello like this, - * so we simply reject such connections to avoid - * protocol version downgrade attacks. */ - if (p[3] == 0 && p[4] < 6) { - SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, - SSL_R_RECORD_TOO_SMALL); - return -1; - } - client_version = p[9] << 8 | p[10]; - - if (!ssl_max_shared_version(s, client_version, - &shared_version)) { - if (s->internal->options & SSL_OP_NO_TLSv1) - goto unsupported; - /* - * We won't be able to use TLS of course, - * but this will send an appropriate alert. - */ - shared_version = TLS1_VERSION; - } - s->version = shared_version; - type = 3; - } else if ((strncmp("GET ", (char *)p, 4) == 0) || - (strncmp("POST ",(char *)p, 5) == 0) || - (strncmp("HEAD ",(char *)p, 5) == 0) || - (strncmp("PUT ", (char *)p, 4) == 0)) { - SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_HTTP_REQUEST); - return -1; - } else if (strncmp("CONNECT", (char *)p, 7) == 0) { - SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_HTTPS_PROXY_REQUEST); - return -1; - } - } - - if (s->internal->state == SSL23_ST_SR_CLNT_HELLO_B) { - /* we have SSLv3/TLSv1 in an SSLv2 header - * (other cases skip this state) */ - - /* - * Limit the support of "backward compatible" headers - * only to "backward" versions of TLS. If we have moved - * on to modernity, just say no. - */ - if (s->internal->options & SSL_OP_NO_TLSv1) - goto unsupported; - - type = 2; - p = s->internal->packet; - client_version = p[3] << 8 | p[4]; - - /* An SSLv3/TLSv1 backwards-compatible CLIENT-HELLO in an SSLv2 - * header is sent directly on the wire, not wrapped as a TLS - * record. It's format is: - * Byte Content - * 0-1 msg_length - * 2 msg_type - * 3-4 version - * 5-6 cipher_spec_length - * 7-8 session_id_length - * 9-10 challenge_length - * ... ... - */ - n = ((p[0] & 0x7f) << 8) | p[1]; - if (n > (1024 * 4)) { - SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_RECORD_TOO_LARGE); - return -1; - } - if (n < 9) { - SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, - SSL_R_RECORD_LENGTH_MISMATCH); - return -1; - } - - j = ssl23_read_bytes(s, n + 2); - if (j != n + 2) - return -1; - - tls1_finish_mac(s, s->internal->packet + 2, s->internal->packet_length - 2); - if (s->internal->msg_callback) - s->internal->msg_callback(0, SSL2_VERSION, 0, s->internal->packet + 2, - s->internal->packet_length - 2, s, s->internal->msg_callback_arg); - - p = s->internal->packet; - p += 5; - n2s(p, csl); - n2s(p, sil); - n2s(p, cl); - d = (unsigned char *)s->internal->init_buf->data; - if ((csl + sil + cl + 11) != s->internal->packet_length) { - /* - * We can't have TLS extensions in SSL 2.0 format - * Client Hello, can we ? Error condition should be - * '>' otherwise - */ - SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, - SSL_R_RECORD_LENGTH_MISMATCH); - return -1; - } - - /* record header: msg_type ... */ - *(d++) = SSL3_MT_CLIENT_HELLO; - /* ... and length (actual value will be written later) */ - d_len = d; - d += 3; - - /* client_version */ - *(d++) = client_version >> 8; - *(d++) = client_version & 0xff; - - /* lets populate the random area */ - /* get the challenge_length */ - i = (cl > SSL3_RANDOM_SIZE) ? SSL3_RANDOM_SIZE : cl; - memset(d, 0, SSL3_RANDOM_SIZE); - memcpy(&(d[SSL3_RANDOM_SIZE - i]), &(p[csl + sil]), i); - d += SSL3_RANDOM_SIZE; - - /* no session-id reuse */ - *(d++) = 0; - - /* ciphers */ - j = 0; - dd = d; - d += 2; - for (i = 0; i < csl; i += 3) { - if (p[i] != 0) - continue; - *(d++) = p[i + 1]; - *(d++) = p[i + 2]; - j += 2; - } - s2n(j, dd); - - /* add in (no) COMPRESSION */ - *(d++) = 1; - *(d++) = 0; - - i = (d - (unsigned char *)s->internal->init_buf->data) - 4; - l2n3((long)i, d_len); - - /* get the data reused from the init_buf */ - S3I(s)->tmp.reuse_message = 1; - S3I(s)->tmp.message_type = SSL3_MT_CLIENT_HELLO; - S3I(s)->tmp.message_size = i; - } - - /* imaginary new state (for program structure): */ - /* s->internal->state = SSL23_SR_CLNT_HELLO_C */ - - if (type == 2 || type == 3) { - /* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */ - - if (!ssl_init_wbio_buffer(s, 1)) - return -1; - - /* we are in this state */ - s->internal->state = SSL3_ST_SR_CLNT_HELLO_A; - - if (type == 3) { - /* put the 'n' bytes we have read into the input buffer - * for SSLv3 */ - s->internal->rstate = SSL_ST_READ_HEADER; - s->internal->packet_length = n; - if (s->s3->rbuf.buf == NULL) - if (!ssl3_setup_read_buffer(s)) - return -1; - - s->internal->packet = &(s->s3->rbuf.buf[0]); - memcpy(s->internal->packet, buf, n); - s->s3->rbuf.left = n; - s->s3->rbuf.offset = 0; - } else { - s->internal->packet_length = 0; - s->s3->rbuf.left = 0; - s->s3->rbuf.offset = 0; - } - if (s->version == TLS1_2_VERSION) - s->method = TLSv1_2_server_method(); - else if (s->version == TLS1_1_VERSION) - s->method = TLSv1_1_server_method(); - else if (s->version == TLS1_VERSION) - s->method = TLSv1_server_method(); - else - goto unsupported; - s->internal->handshake_func = s->method->internal->ssl_accept; - } else { - /* bad, very bad */ - SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL); - return -1; - } - s->internal->init_num = 0; - - return (SSL_accept(s)); - - unsupported: - SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); - return -1; -} |