diff options
Diffstat (limited to 'openssl/ssl/d1_srvr.c')
| -rw-r--r-- | openssl/ssl/d1_srvr.c | 1563 |
1 files changed, 0 insertions, 1563 deletions
diff --git a/openssl/ssl/d1_srvr.c b/openssl/ssl/d1_srvr.c deleted file mode 100644 index a6a4c87e..00000000 --- a/openssl/ssl/d1_srvr.c +++ /dev/null @@ -1,1563 +0,0 @@ -/* ssl/d1_srvr.c */ -/* - * DTLS implementation written by Nagendra Modadugu - * (nagendra@cs.stanford.edu) for the OpenSSL project 2005. - */ -/* ==================================================================== - * Copyright (c) 1999-2007 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). - * - */ -/* 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.] - */ - -#include <stdio.h> -#include "ssl_locl.h" -#include <openssl/buffer.h> -#include <openssl/rand.h> -#include <openssl/objects.h> -#include <openssl/evp.h> -#include <openssl/x509.h> -#include <openssl/md5.h> -#include <openssl/bn.h> -#ifndef OPENSSL_NO_DH -#include <openssl/dh.h> -#endif - -static const SSL_METHOD *dtls1_get_server_method(int ver); -static int dtls1_send_hello_verify_request(SSL *s); - -static const SSL_METHOD *dtls1_get_server_method(int ver) - { - if (ver == DTLS1_VERSION) - return(DTLSv1_server_method()); - else - return(NULL); - } - -IMPLEMENT_dtls1_meth_func(DTLSv1_server_method, - dtls1_accept, - ssl_undefined_function, - dtls1_get_server_method) - -int dtls1_accept(SSL *s) - { - BUF_MEM *buf; - unsigned long Time=(unsigned long)time(NULL); - void (*cb)(const SSL *ssl,int type,int val)=NULL; - unsigned long alg_k; - int ret= -1; - int new_state,state,skip=0; - int listen; - - RAND_add(&Time,sizeof(Time),0); - ERR_clear_error(); - clear_sys_error(); - - if (s->info_callback != NULL) - cb=s->info_callback; - else if (s->ctx->info_callback != NULL) - cb=s->ctx->info_callback; - - listen = s->d1->listen; - - /* init things to blank */ - s->in_handshake++; - if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); - - s->d1->listen = listen; - - if (s->cert == NULL) - { - SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_NO_CERTIFICATE_SET); - return(-1); - } - - for (;;) - { - state=s->state; - - switch (s->state) - { - case SSL_ST_RENEGOTIATE: - s->new_session=1; - /* s->state=SSL_ST_ACCEPT; */ - - 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); - - if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00)) - { - SSLerr(SSL_F_DTLS1_ACCEPT, ERR_R_INTERNAL_ERROR); - return -1; - } - s->type=SSL_ST_ACCEPT; - - if (s->init_buf == NULL) - { - if ((buf=BUF_MEM_new()) == NULL) - { - ret= -1; - goto end; - } - if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) - { - ret= -1; - goto end; - } - s->init_buf=buf; - } - - if (!ssl3_setup_buffers(s)) - { - ret= -1; - goto end; - } - - s->init_num=0; - - if (s->state != SSL_ST_RENEGOTIATE) - { - /* Ok, we now need to push on a buffering BIO so that - * the output is sent in a way that TCP likes :-) - */ - if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } - - ssl3_init_finished_mac(s); - s->state=SSL3_ST_SR_CLNT_HELLO_A; - s->ctx->stats.sess_accept++; - } - else - { - /* s->state == SSL_ST_RENEGOTIATE, - * we will just send a HelloRequest */ - s->ctx->stats.sess_accept_renegotiate++; - s->state=SSL3_ST_SW_HELLO_REQ_A; - } - - break; - - case SSL3_ST_SW_HELLO_REQ_A: - case SSL3_ST_SW_HELLO_REQ_B: - - s->shutdown=0; - dtls1_start_timer(s); - ret=dtls1_send_hello_request(s); - if (ret <= 0) goto end; - s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; - s->state=SSL3_ST_SW_FLUSH; - s->init_num=0; - - ssl3_init_finished_mac(s); - break; - - case SSL3_ST_SW_HELLO_REQ_C: - s->state=SSL_ST_OK; - break; - - case SSL3_ST_SR_CLNT_HELLO_A: - case SSL3_ST_SR_CLNT_HELLO_B: - case SSL3_ST_SR_CLNT_HELLO_C: - - s->shutdown=0; - ret=ssl3_get_client_hello(s); - if (ret <= 0) goto end; - dtls1_stop_timer(s); - - if (ret == 1 && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)) - s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A; - else - s->state = SSL3_ST_SW_SRVR_HELLO_A; - - s->init_num=0; - - /* Reflect ClientHello sequence to remain stateless while listening */ - if (listen) - { - memcpy(s->s3->write_sequence, s->s3->read_sequence, sizeof(s->s3->write_sequence)); - } - - /* If we're just listening, stop here */ - if (listen && s->state == SSL3_ST_SW_SRVR_HELLO_A) - { - ret = 2; - s->d1->listen = 0; - /* Set expected sequence numbers - * to continue the handshake. - */ - s->d1->handshake_read_seq = 2; - s->d1->handshake_write_seq = 1; - s->d1->next_handshake_write_seq = 1; - goto end; - } - - break; - - case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A: - case DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B: - - ret = dtls1_send_hello_verify_request(s); - if ( ret <= 0) goto end; - s->state=SSL3_ST_SW_FLUSH; - s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A; - - /* HelloVerifyRequest resets Finished MAC */ - if (s->version != DTLS1_BAD_VER) - ssl3_init_finished_mac(s); - break; - - case SSL3_ST_SW_SRVR_HELLO_A: - case SSL3_ST_SW_SRVR_HELLO_B: - s->new_session = 2; - dtls1_start_timer(s); - ret=dtls1_send_server_hello(s); - if (ret <= 0) goto end; - -#ifndef OPENSSL_NO_TLSEXT - if (s->hit) - { - if (s->tlsext_ticket_expected) - s->state=SSL3_ST_SW_SESSION_TICKET_A; - else - s->state=SSL3_ST_SW_CHANGE_A; - } -#else - if (s->hit) - s->state=SSL3_ST_SW_CHANGE_A; -#endif - else - s->state=SSL3_ST_SW_CERT_A; - s->init_num=0; - break; - - case SSL3_ST_SW_CERT_A: - case SSL3_ST_SW_CERT_B: - /* Check if it is anon DH or normal PSK */ - if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) - && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) - { - dtls1_start_timer(s); - ret=dtls1_send_server_certificate(s); - if (ret <= 0) goto end; -#ifndef OPENSSL_NO_TLSEXT - if (s->tlsext_status_expected) - s->state=SSL3_ST_SW_CERT_STATUS_A; - else - s->state=SSL3_ST_SW_KEY_EXCH_A; - } - else - { - skip = 1; - s->state=SSL3_ST_SW_KEY_EXCH_A; - } -#else - } - else - skip=1; - - s->state=SSL3_ST_SW_KEY_EXCH_A; -#endif - s->init_num=0; - break; - - case SSL3_ST_SW_KEY_EXCH_A: - case SSL3_ST_SW_KEY_EXCH_B: - alg_k = s->s3->tmp.new_cipher->algorithm_mkey; - - /* clear this, it may get reset by - * send_server_key_exchange */ - if ((s->options & SSL_OP_EPHEMERAL_RSA) -#ifndef OPENSSL_NO_KRB5 - && !(alg_k & SSL_kKRB5) -#endif /* OPENSSL_NO_KRB5 */ - ) - /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key - * even when forbidden by protocol specs - * (handshake may fail as clients are not required to - * be able to handle this) */ - s->s3->tmp.use_rsa_tmp=1; - else - s->s3->tmp.use_rsa_tmp=0; - - /* only send if a DH key exchange or - * RSA but we have a sign only certificate */ - if (s->s3->tmp.use_rsa_tmp - /* PSK: send ServerKeyExchange if PSK identity - * hint if provided */ -#ifndef OPENSSL_NO_PSK - || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint) -#endif - || (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) - || (alg_k & SSL_kEECDH) - || ((alg_k & SSL_kRSA) - && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL - || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) - && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) - ) - ) - ) - ) - { - dtls1_start_timer(s); - ret=dtls1_send_server_key_exchange(s); - if (ret <= 0) goto end; - } - else - skip=1; - - s->state=SSL3_ST_SW_CERT_REQ_A; - s->init_num=0; - break; - - case SSL3_ST_SW_CERT_REQ_A: - case SSL3_ST_SW_CERT_REQ_B: - if (/* don't request cert unless asked for it: */ - !(s->verify_mode & SSL_VERIFY_PEER) || - /* if SSL_VERIFY_CLIENT_ONCE is set, - * don't request cert during re-negotiation: */ - ((s->session->peer != NULL) && - (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || - /* never request cert in anonymous ciphersuites - * (see section "Certificate request" in SSL 3 drafts - * and in RFC 2246): */ - ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && - /* ... except when the application insists on verification - * (against the specs, but s3_clnt.c accepts this for SSL 3) */ - !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || - /* never request cert in Kerberos ciphersuites */ - (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) - /* With normal PSK Certificates and - * Certificate Requests are omitted */ - || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) - { - /* no cert request */ - skip=1; - s->s3->tmp.cert_request=0; - s->state=SSL3_ST_SW_SRVR_DONE_A; - } - else - { - s->s3->tmp.cert_request=1; - dtls1_start_timer(s); - ret=dtls1_send_certificate_request(s); - if (ret <= 0) goto end; -#ifndef NETSCAPE_HANG_BUG - s->state=SSL3_ST_SW_SRVR_DONE_A; -#else - s->state=SSL3_ST_SW_FLUSH; - s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; -#endif - s->init_num=0; - } - break; - - case SSL3_ST_SW_SRVR_DONE_A: - case SSL3_ST_SW_SRVR_DONE_B: - dtls1_start_timer(s); - ret=dtls1_send_server_done(s); - if (ret <= 0) goto end; - s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; - s->state=SSL3_ST_SW_FLUSH; - s->init_num=0; - break; - - case SSL3_ST_SW_FLUSH: - s->rwstate=SSL_WRITING; - if (BIO_flush(s->wbio) <= 0) - { - ret= -1; - goto end; - } - s->rwstate=SSL_NOTHING; - s->state=s->s3->tmp.next_state; - break; - - case SSL3_ST_SR_CERT_A: - case SSL3_ST_SR_CERT_B: - /* Check for second client hello (MS SGC) */ - ret = ssl3_check_client_hello(s); - if (ret <= 0) - goto end; - dtls1_stop_timer(s); - if (ret == 2) - s->state = SSL3_ST_SR_CLNT_HELLO_C; - else { - /* could be sent for a DH cert, even if we - * have not asked for it :-) */ - ret=ssl3_get_client_certificate(s); - if (ret <= 0) goto end; - dtls1_stop_timer(s); - s->init_num=0; - s->state=SSL3_ST_SR_KEY_EXCH_A; - } - break; - - case SSL3_ST_SR_KEY_EXCH_A: - case SSL3_ST_SR_KEY_EXCH_B: - ret=ssl3_get_client_key_exchange(s); - if (ret <= 0) goto end; - dtls1_stop_timer(s); - s->state=SSL3_ST_SR_CERT_VRFY_A; - s->init_num=0; - - if (ret == 2) - { - /* For the ECDH ciphersuites when - * the client sends its ECDH pub key in - * a certificate, the CertificateVerify - * message is not sent. - */ - s->state=SSL3_ST_SR_FINISHED_A; - s->init_num = 0; - } - else - { - s->state=SSL3_ST_SR_CERT_VRFY_A; - s->init_num=0; - - /* We need to get hashes here so if there is - * a client cert, it can be verified */ - s->method->ssl3_enc->cert_verify_mac(s, - NID_md5, - &(s->s3->tmp.cert_verify_md[0])); - s->method->ssl3_enc->cert_verify_mac(s, - NID_sha1, - &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); - } - break; - - case SSL3_ST_SR_CERT_VRFY_A: - case SSL3_ST_SR_CERT_VRFY_B: - - s->d1->change_cipher_spec_ok = 1; - /* we should decide if we expected this one */ - ret=ssl3_get_cert_verify(s); - if (ret <= 0) goto end; - dtls1_stop_timer(s); - - s->state=SSL3_ST_SR_FINISHED_A; - s->init_num=0; - break; - - case SSL3_ST_SR_FINISHED_A: - case SSL3_ST_SR_FINISHED_B: - s->d1->change_cipher_spec_ok = 1; - ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, - SSL3_ST_SR_FINISHED_B); - if (ret <= 0) goto end; - dtls1_stop_timer(s); - if (s->hit) - s->state=SSL_ST_OK; -#ifndef OPENSSL_NO_TLSEXT - else if (s->tlsext_ticket_expected) - s->state=SSL3_ST_SW_SESSION_TICKET_A; -#endif - else - s->state=SSL3_ST_SW_CHANGE_A; - s->init_num=0; - break; - -#ifndef OPENSSL_NO_TLSEXT - case SSL3_ST_SW_SESSION_TICKET_A: - case SSL3_ST_SW_SESSION_TICKET_B: - ret=dtls1_send_newsession_ticket(s); - if (ret <= 0) goto end; - s->state=SSL3_ST_SW_CHANGE_A; - s->init_num=0; - break; - - case SSL3_ST_SW_CERT_STATUS_A: - case SSL3_ST_SW_CERT_STATUS_B: - ret=ssl3_send_cert_status(s); - if (ret <= 0) goto end; - s->state=SSL3_ST_SW_KEY_EXCH_A; - s->init_num=0; - break; - -#endif - - case SSL3_ST_SW_CHANGE_A: - case SSL3_ST_SW_CHANGE_B: - - s->session->cipher=s->s3->tmp.new_cipher; - if (!s->method->ssl3_enc->setup_key_block(s)) - { ret= -1; goto end; } - - ret=dtls1_send_change_cipher_spec(s, - SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); - - if (ret <= 0) goto end; - s->state=SSL3_ST_SW_FINISHED_A; - s->init_num=0; - - if (!s->method->ssl3_enc->change_cipher_state(s, - SSL3_CHANGE_CIPHER_SERVER_WRITE)) - { - ret= -1; - goto end; - } - - dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); - break; - - case SSL3_ST_SW_FINISHED_A: - case SSL3_ST_SW_FINISHED_B: - ret=dtls1_send_finished(s, - SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, - s->method->ssl3_enc->server_finished_label, - s->method->ssl3_enc->server_finished_label_len); - if (ret <= 0) goto end; - s->state=SSL3_ST_SW_FLUSH; - if (s->hit) - s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; - else - s->s3->tmp.next_state=SSL_ST_OK; - s->init_num=0; - break; - - case SSL_ST_OK: - /* clean a few things up */ - ssl3_cleanup_key_block(s); - -#if 0 - BUF_MEM_free(s->init_buf); - s->init_buf=NULL; -#endif - - /* remove buffering on output */ - ssl_free_wbio_buffer(s); - - s->init_num=0; - - if (s->new_session == 2) /* skipped if we just sent a HelloRequest */ - { - /* actually not necessarily a 'new' session unless - * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */ - - s->new_session=0; - - ssl_update_cache(s,SSL_SESS_CACHE_SERVER); - - s->ctx->stats.sess_accept_good++; - /* s->server=1; */ - s->handshake_func=dtls1_accept; - - if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); - } - - ret = 1; - - /* done handshaking, next message is client hello */ - s->d1->handshake_read_seq = 0; - /* next message is server hello */ - s->d1->handshake_write_seq = 0; - s->d1->next_handshake_write_seq = 0; - goto end; - /* break; */ - - default: - SSLerr(SSL_F_DTLS1_ACCEPT,SSL_R_UNKNOWN_STATE); - ret= -1; - goto end; - /* break; */ - } - - if (!s->s3->tmp.reuse_message && !skip) - { - if (s->debug) - { - if ((ret=BIO_flush(s->wbio)) <= 0) - goto end; - } - - - if ((cb != NULL) && (s->state != state)) - { - new_state=s->state; - s->state=state; - cb(s,SSL_CB_ACCEPT_LOOP,1); - s->state=new_state; - } - } - skip=0; - } -end: - /* BIO_flush(s->wbio); */ - - s->in_handshake--; - if (cb != NULL) - cb(s,SSL_CB_ACCEPT_EXIT,ret); - return(ret); - } - -int dtls1_send_hello_request(SSL *s) - { - unsigned char *p; - - if (s->state == SSL3_ST_SW_HELLO_REQ_A) - { - p=(unsigned char *)s->init_buf->data; - p = dtls1_set_message_header(s, p, SSL3_MT_HELLO_REQUEST, 0, 0, 0); - - s->state=SSL3_ST_SW_HELLO_REQ_B; - /* number of bytes to write */ - s->init_num=DTLS1_HM_HEADER_LENGTH; - s->init_off=0; - - /* no need to buffer this message, since there are no retransmit - * requests for it */ - } - - /* SSL3_ST_SW_HELLO_REQ_B */ - return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); - } - -int dtls1_send_hello_verify_request(SSL *s) - { - unsigned int msg_len; - unsigned char *msg, *buf, *p; - - if (s->state == DTLS1_ST_SW_HELLO_VERIFY_REQUEST_A) - { - buf = (unsigned char *)s->init_buf->data; - - msg = p = &(buf[DTLS1_HM_HEADER_LENGTH]); - *(p++) = s->version >> 8; - *(p++) = s->version & 0xFF; - - if (s->ctx->app_gen_cookie_cb == NULL || - s->ctx->app_gen_cookie_cb(s, s->d1->cookie, - &(s->d1->cookie_len)) == 0) - { - SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,ERR_R_INTERNAL_ERROR); - return 0; - } - - *(p++) = (unsigned char) s->d1->cookie_len; - memcpy(p, s->d1->cookie, s->d1->cookie_len); - p += s->d1->cookie_len; - msg_len = p - msg; - - dtls1_set_message_header(s, buf, - DTLS1_MT_HELLO_VERIFY_REQUEST, msg_len, 0, msg_len); - - s->state=DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B; - /* number of bytes to write */ - s->init_num=p-buf; - s->init_off=0; - } - - /* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */ - return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); - } - -int dtls1_send_server_hello(SSL *s) - { - unsigned char *buf; - unsigned char *p,*d; - int i; - unsigned int sl; - unsigned long l,Time; - - if (s->state == SSL3_ST_SW_SRVR_HELLO_A) - { - buf=(unsigned char *)s->init_buf->data; - p=s->s3->server_random; - Time=(unsigned long)time(NULL); /* Time */ - l2n(Time,p); - RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time)); - /* Do the message type and length last */ - d=p= &(buf[DTLS1_HM_HEADER_LENGTH]); - - *(p++)=s->version>>8; - *(p++)=s->version&0xff; - - /* Random stuff */ - memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); - p+=SSL3_RANDOM_SIZE; - - /* now in theory we have 3 options to sending back the - * session id. If it is a re-use, we send back the - * old session-id, if it is a new session, we send - * back the new session-id or we send back a 0 length - * session-id if we want it to be single use. - * Currently I will not implement the '0' length session-id - * 12-Jan-98 - I'll now support the '0' length stuff. - */ - if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)) - s->session->session_id_length=0; - - sl=s->session->session_id_length; - if (sl > sizeof s->session->session_id) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); - return -1; - } - *(p++)=sl; - memcpy(p,s->session->session_id,sl); - p+=sl; - - /* put the cipher */ - if (s->s3->tmp.new_cipher == NULL) - return -1; - i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); - p+=i; - - /* put the compression method */ -#ifdef OPENSSL_NO_COMP - *(p++)=0; -#else - if (s->s3->tmp.new_compression == NULL) - *(p++)=0; - else - *(p++)=s->s3->tmp.new_compression->id; -#endif - -#ifndef OPENSSL_NO_TLSEXT - if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); - return -1; - } -#endif - - /* do the header */ - l=(p-d); - d=buf; - - d = dtls1_set_message_header(s, d, SSL3_MT_SERVER_HELLO, l, 0, l); - - s->state=SSL3_ST_SW_SRVR_HELLO_B; - /* number of bytes to write */ - s->init_num=p-buf; - s->init_off=0; - - /* buffer the message to handle re-xmits */ - dtls1_buffer_message(s, 0); - } - - /* SSL3_ST_SW_SRVR_HELLO_B */ - return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); - } - -int dtls1_send_server_done(SSL *s) - { - unsigned char *p; - - if (s->state == SSL3_ST_SW_SRVR_DONE_A) - { - p=(unsigned char *)s->init_buf->data; - - /* do the header */ - p = dtls1_set_message_header(s, p, SSL3_MT_SERVER_DONE, 0, 0, 0); - - s->state=SSL3_ST_SW_SRVR_DONE_B; - /* number of bytes to write */ - s->init_num=DTLS1_HM_HEADER_LENGTH; - s->init_off=0; - - /* buffer the message to handle re-xmits */ - dtls1_buffer_message(s, 0); - } - - /* SSL3_ST_SW_SRVR_DONE_B */ - return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); - } - -int dtls1_send_server_key_exchange(SSL *s) - { -#ifndef OPENSSL_NO_RSA - unsigned char *q; - int j,num; - RSA *rsa; - unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; - unsigned int u; -#endif -#ifndef OPENSSL_NO_DH - DH *dh=NULL,*dhp; -#endif -#ifndef OPENSSL_NO_ECDH - EC_KEY *ecdh=NULL, *ecdhp; - unsigned char *encodedPoint = NULL; - int encodedlen = 0; - int curve_id = 0; - BN_CTX *bn_ctx = NULL; -#endif - EVP_PKEY *pkey; - unsigned char *p,*d; - int al,i; - unsigned long type; - int n; - CERT *cert; - BIGNUM *r[4]; - int nr[4],kn; - BUF_MEM *buf; - EVP_MD_CTX md_ctx; - - EVP_MD_CTX_init(&md_ctx); - if (s->state == SSL3_ST_SW_KEY_EXCH_A) - { - type=s->s3->tmp.new_cipher->algorithm_mkey; - cert=s->cert; - - buf=s->init_buf; - - r[0]=r[1]=r[2]=r[3]=NULL; - n=0; -#ifndef OPENSSL_NO_RSA - if (type & SSL_kRSA) - { - rsa=cert->rsa_tmp; - if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) - { - rsa=s->cert->rsa_tmp_cb(s, - SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), - SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); - if(rsa == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); - goto f_err; - } - RSA_up_ref(rsa); - cert->rsa_tmp=rsa; - } - if (rsa == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); - goto f_err; - } - r[0]=rsa->n; - r[1]=rsa->e; - s->s3->tmp.use_rsa_tmp=1; - } - else -#endif -#ifndef OPENSSL_NO_DH - if (type & SSL_kEDH) - { - dhp=cert->dh_tmp; - if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) - dhp=s->cert->dh_tmp_cb(s, - SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), - SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); - if (dhp == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); - goto f_err; - } - - if (s->s3->tmp.dh != NULL) - { - DH_free(dh); - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); - goto err; - } - - if ((dh=DHparams_dup(dhp)) == NULL) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); - goto err; - } - - s->s3->tmp.dh=dh; - if ((dhp->pub_key == NULL || - dhp->priv_key == NULL || - (s->options & SSL_OP_SINGLE_DH_USE))) - { - if(!DH_generate_key(dh)) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, - ERR_R_DH_LIB); - goto err; - } - } - else - { - dh->pub_key=BN_dup(dhp->pub_key); - dh->priv_key=BN_dup(dhp->priv_key); - if ((dh->pub_key == NULL) || - (dh->priv_key == NULL)) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); - goto err; - } - } - r[0]=dh->p; - r[1]=dh->g; - r[2]=dh->pub_key; - } - else -#endif -#ifndef OPENSSL_NO_ECDH - if (type & SSL_kEECDH) - { - const EC_GROUP *group; - - ecdhp=cert->ecdh_tmp; - if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL)) - { - ecdhp=s->cert->ecdh_tmp_cb(s, - SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), - SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); - } - if (ecdhp == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); - goto f_err; - } - - if (s->s3->tmp.ecdh != NULL) - { - EC_KEY_free(s->s3->tmp.ecdh); - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); - goto err; - } - - /* Duplicate the ECDH structure. */ - if (ecdhp == NULL) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); - goto err; - } - if ((ecdh = EC_KEY_dup(ecdhp)) == NULL) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); - goto err; - } - - s->s3->tmp.ecdh=ecdh; - if ((EC_KEY_get0_public_key(ecdh) == NULL) || - (EC_KEY_get0_private_key(ecdh) == NULL) || - (s->options & SSL_OP_SINGLE_ECDH_USE)) - { - if(!EC_KEY_generate_key(ecdh)) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); - goto err; - } - } - - if (((group = EC_KEY_get0_group(ecdh)) == NULL) || - (EC_KEY_get0_public_key(ecdh) == NULL) || - (EC_KEY_get0_private_key(ecdh) == NULL)) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); - goto err; - } - - if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && - (EC_GROUP_get_degree(group) > 163)) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); - goto err; - } - - /* XXX: For now, we only support ephemeral ECDH - * keys over named (not generic) curves. For - * supported named curves, curve_id is non-zero. - */ - if ((curve_id = - tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group))) - == 0) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); - goto err; - } - - /* Encode the public key. - * First check the size of encoding and - * allocate memory accordingly. - */ - encodedlen = EC_POINT_point2oct(group, - EC_KEY_get0_public_key(ecdh), - POINT_CONVERSION_UNCOMPRESSED, - NULL, 0, NULL); - - encodedPoint = (unsigned char *) - OPENSSL_malloc(encodedlen*sizeof(unsigned char)); - bn_ctx = BN_CTX_new(); - if ((encodedPoint == NULL) || (bn_ctx == NULL)) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); - goto err; - } - - - encodedlen = EC_POINT_point2oct(group, - EC_KEY_get0_public_key(ecdh), - POINT_CONVERSION_UNCOMPRESSED, - encodedPoint, encodedlen, bn_ctx); - - if (encodedlen == 0) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); - goto err; - } - - BN_CTX_free(bn_ctx); bn_ctx=NULL; - - /* XXX: For now, we only support named (not - * generic) curves in ECDH ephemeral key exchanges. - * In this situation, we need four additional bytes - * to encode the entire ServerECDHParams - * structure. - */ - n = 4 + encodedlen; - - /* We'll generate the serverKeyExchange message - * explicitly so we can set these to NULLs - */ - r[0]=NULL; - r[1]=NULL; - r[2]=NULL; - r[3]=NULL; - } - else -#endif /* !OPENSSL_NO_ECDH */ -#ifndef OPENSSL_NO_PSK - if (type & SSL_kPSK) - { - /* reserve size for record length and PSK identity hint*/ - n+=2+strlen(s->ctx->psk_identity_hint); - } - else -#endif /* !OPENSSL_NO_PSK */ - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); - goto f_err; - } - for (i=0; r[i] != NULL; i++) - { - nr[i]=BN_num_bytes(r[i]); - n+=2+nr[i]; - } - - if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) - && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) - { - if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) - == NULL) - { - al=SSL_AD_DECODE_ERROR; - goto f_err; - } - kn=EVP_PKEY_size(pkey); - } - else - { - pkey=NULL; - kn=0; - } - - if (!BUF_MEM_grow_clean(buf,n+DTLS1_HM_HEADER_LENGTH+kn)) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); - goto err; - } - d=(unsigned char *)s->init_buf->data; - p= &(d[DTLS1_HM_HEADER_LENGTH]); - - for (i=0; r[i] != NULL; i++) - { - s2n(nr[i],p); - BN_bn2bin(r[i],p); - p+=nr[i]; - } - -#ifndef OPENSSL_NO_ECDH - if (type & SSL_kEECDH) - { - /* XXX: For now, we only support named (not generic) curves. - * In this situation, the serverKeyExchange message has: - * [1 byte CurveType], [2 byte CurveName] - * [1 byte length of encoded point], followed by - * the actual encoded point itself - */ - *p = NAMED_CURVE_TYPE; - p += 1; - *p = 0; - p += 1; - *p = curve_id; - p += 1; - *p = encodedlen; - p += 1; - memcpy((unsigned char*)p, - (unsigned char *)encodedPoint, - encodedlen); - OPENSSL_free(encodedPoint); - p += encodedlen; - } -#endif - -#ifndef OPENSSL_NO_PSK - if (type & SSL_kPSK) - { - /* copy PSK identity hint */ - s2n(strlen(s->ctx->psk_identity_hint), p); - strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint)); - p+=strlen(s->ctx->psk_identity_hint); - } -#endif - - /* not anonymous */ - if (pkey != NULL) - { - /* n is the length of the params, they start at - * &(d[DTLS1_HM_HEADER_LENGTH]) and p points to the space - * at the end. */ -#ifndef OPENSSL_NO_RSA - if (pkey->type == EVP_PKEY_RSA) - { - q=md_buf; - j=0; - for (num=2; num > 0; num--) - { - EVP_DigestInit_ex(&md_ctx,(num == 2) - ?s->ctx->md5:s->ctx->sha1, NULL); - EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); - EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); - EVP_DigestUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); - EVP_DigestFinal_ex(&md_ctx,q, - (unsigned int *)&i); - q+=i; - j+=i; - } - if (RSA_sign(NID_md5_sha1, md_buf, j, - &(p[2]), &u, pkey->pkey.rsa) <= 0) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); - goto err; - } - s2n(u,p); - n+=u+2; - } - else -#endif -#if !defined(OPENSSL_NO_DSA) - if (pkey->type == EVP_PKEY_DSA) - { - /* lets do DSS */ - EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL); - EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); - EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); - EVP_SignUpdate(&md_ctx,&(d[DTLS1_HM_HEADER_LENGTH]),n); - if (!EVP_SignFinal(&md_ctx,&(p[2]), - (unsigned int *)&i,pkey)) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); - goto err; - } - s2n(i,p); - n+=i+2; - } - else -#endif -#if !defined(OPENSSL_NO_ECDSA) - if (pkey->type == EVP_PKEY_EC) - { - /* let's do ECDSA */ - EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL); - EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); - EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); - EVP_SignUpdate(&md_ctx,&(d[4]),n); - if (!EVP_SignFinal(&md_ctx,&(p[2]), - (unsigned int *)&i,pkey)) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA); - goto err; - } - s2n(i,p); - n+=i+2; - } - else -#endif - { - /* Is this error check actually needed? */ - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); - goto f_err; - } - } - - d = dtls1_set_message_header(s, d, - SSL3_MT_SERVER_KEY_EXCHANGE, n, 0, n); - - /* we should now have things packed up, so lets send - * it off */ - s->init_num=n+DTLS1_HM_HEADER_LENGTH; - s->init_off=0; - - /* buffer the message to handle re-xmits */ - dtls1_buffer_message(s, 0); - } - - s->state = SSL3_ST_SW_KEY_EXCH_B; - EVP_MD_CTX_cleanup(&md_ctx); - return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); -f_err: - ssl3_send_alert(s,SSL3_AL_FATAL,al); -err: -#ifndef OPENSSL_NO_ECDH - if (encodedPoint != NULL) OPENSSL_free(encodedPoint); - BN_CTX_free(bn_ctx); -#endif - EVP_MD_CTX_cleanup(&md_ctx); - return(-1); - } - -int dtls1_send_certificate_request(SSL *s) - { - unsigned char *p,*d; - int i,j,nl,off,n; - STACK_OF(X509_NAME) *sk=NULL; - X509_NAME *name; - BUF_MEM *buf; - unsigned int msg_len; - - if (s->state == SSL3_ST_SW_CERT_REQ_A) - { - buf=s->init_buf; - - d=p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH]); - - /* get the list of acceptable cert types */ - p++; - n=ssl3_get_req_cert_type(s,p); - d[0]=n; - p+=n; - n++; - - off=n; - p+=2; - n+=2; - - sk=SSL_get_client_CA_list(s); - nl=0; - if (sk != NULL) - { - for (i=0; i<sk_X509_NAME_num(sk); i++) - { - name=sk_X509_NAME_value(sk,i); - j=i2d_X509_NAME(name,NULL); - if (!BUF_MEM_grow_clean(buf,DTLS1_HM_HEADER_LENGTH+n+j+2)) - { - SSLerr(SSL_F_DTLS1_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); - goto err; - } - p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+n]); - if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) - { - s2n(j,p); - i2d_X509_NAME(name,&p); - n+=2+j; - nl+=2+j; - } - else - { - d=p; - i2d_X509_NAME(name,&p); - j-=2; s2n(j,d); j+=2; - n+=j; - nl+=j; - } - } - } - /* else no CA names */ - p=(unsigned char *)&(buf->data[DTLS1_HM_HEADER_LENGTH+off]); - s2n(nl,p); - - d=(unsigned char *)buf->data; - *(d++)=SSL3_MT_CERTIFICATE_REQUEST; - l2n3(n,d); - s2n(s->d1->handshake_write_seq,d); - s->d1->handshake_write_seq++; - - /* we should now have things packed up, so lets send - * it off */ - - s->init_num=n+DTLS1_HM_HEADER_LENGTH; - s->init_off=0; -#ifdef NETSCAPE_HANG_BUG -/* XXX: what to do about this? */ - p=(unsigned char *)s->init_buf->data + s->init_num; - - /* do the header */ - *(p++)=SSL3_MT_SERVER_DONE; - *(p++)=0; - *(p++)=0; - *(p++)=0; - s->init_num += 4; -#endif - - /* XDTLS: set message header ? */ - msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH; - dtls1_set_message_header(s, (void *)s->init_buf->data, - SSL3_MT_CERTIFICATE_REQUEST, msg_len, 0, msg_len); - - /* buffer the message to handle re-xmits */ - dtls1_buffer_message(s, 0); - - s->state = SSL3_ST_SW_CERT_REQ_B; - } - - /* SSL3_ST_SW_CERT_REQ_B */ - return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); -err: - return(-1); - } - -int dtls1_send_server_certificate(SSL *s) - { - unsigned long l; - X509 *x; - - if (s->state == SSL3_ST_SW_CERT_A) - { - x=ssl_get_server_send_cert(s); - if (x == NULL) - { - /* VRS: allow null cert if auth == KRB5 */ - if ((s->s3->tmp.new_cipher->algorithm_mkey != SSL_kKRB5) || - (s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5)) - { - SSLerr(SSL_F_DTLS1_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); - return(0); - } - } - - l=dtls1_output_cert_chain(s,x); - s->state=SSL3_ST_SW_CERT_B; - s->init_num=(int)l; - s->init_off=0; - - /* buffer the message to handle re-xmits */ - dtls1_buffer_message(s, 0); - } - - /* SSL3_ST_SW_CERT_B */ - return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); - } - -#ifndef OPENSSL_NO_TLSEXT -int dtls1_send_newsession_ticket(SSL *s) - { - if (s->state == SSL3_ST_SW_SESSION_TICKET_A) - { - unsigned char *p, *senc, *macstart; - int len, slen; - unsigned int hlen, msg_len; - EVP_CIPHER_CTX ctx; - HMAC_CTX hctx; - SSL_CTX *tctx = s->initial_ctx; - unsigned char iv[EVP_MAX_IV_LENGTH]; - unsigned char key_name[16]; - - /* get session encoding length */ - slen = i2d_SSL_SESSION(s->session, NULL); - /* Some length values are 16 bits, so forget it if session is - * too long - */ - if (slen > 0xFF00) - return -1; - /* Grow buffer if need be: the length calculation is as - * follows 12 (DTLS handshake message header) + - * 4 (ticket lifetime hint) + 2 (ticket length) + - * 16 (key name) + max_iv_len (iv length) + - * session_length + max_enc_block_size (max encrypted session - * length) + max_md_size (HMAC). - */ - if (!BUF_MEM_grow(s->init_buf, - DTLS1_HM_HEADER_LENGTH + 22 + EVP_MAX_IV_LENGTH + - EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + slen)) - return -1; - senc = OPENSSL_malloc(slen); - if (!senc) - return -1; - p = senc; - i2d_SSL_SESSION(s->session, &p); - - p=(unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]); - EVP_CIPHER_CTX_init(&ctx); - HMAC_CTX_init(&hctx); - /* Initialize HMAC and cipher contexts. If callback present - * it does all the work otherwise use generated values - * from parent ctx. - */ - if (tctx->tlsext_ticket_key_cb) - { - if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx, - &hctx, 1) < 0) - { - OPENSSL_free(senc); - return -1; - } - } - else - { - RAND_pseudo_bytes(iv, 16); - EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, - tctx->tlsext_tick_aes_key, iv); - HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, - tlsext_tick_md(), NULL); - memcpy(key_name, tctx->tlsext_tick_key_name, 16); - } - l2n(s->session->tlsext_tick_lifetime_hint, p); - /* Skip ticket length for now */ - p += 2; - /* Output key name */ - macstart = p; - memcpy(p, key_name, 16); - p += 16; - /* output IV */ - memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx)); - p += EVP_CIPHER_CTX_iv_length(&ctx); - /* Encrypt session data */ - EVP_EncryptUpdate(&ctx, p, &len, senc, slen); - p += len; - EVP_EncryptFinal(&ctx, p, &len); - p += len; - EVP_CIPHER_CTX_cleanup(&ctx); - - HMAC_Update(&hctx, macstart, p - macstart); - HMAC_Final(&hctx, p, &hlen); - HMAC_CTX_cleanup(&hctx); - - p += hlen; - /* Now write out lengths: p points to end of data written */ - /* Total length */ - len = p - (unsigned char *)(s->init_buf->data); - /* Ticket length */ - p=(unsigned char *)&(s->init_buf->data[DTLS1_HM_HEADER_LENGTH]) + 4; - s2n(len - DTLS1_HM_HEADER_LENGTH - 6, p); - - /* number of bytes to write */ - s->init_num= len; - s->state=SSL3_ST_SW_SESSION_TICKET_B; - s->init_off=0; - OPENSSL_free(senc); - - /* XDTLS: set message header ? */ - msg_len = s->init_num - DTLS1_HM_HEADER_LENGTH; - dtls1_set_message_header(s, (void *)s->init_buf->data, - SSL3_MT_NEWSESSION_TICKET, msg_len, 0, msg_len); - - /* buffer the message to handle re-xmits */ - dtls1_buffer_message(s, 0); - } - - /* SSL3_ST_SW_SESSION_TICKET_B */ - return(dtls1_do_write(s,SSL3_RT_HANDSHAKE)); - } -#endif |