| /* |
| * 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 <openssl/bn.h> |
| #include <openssl/buf.h> |
| #include <openssl/dh.h> |
| #include <openssl/evp.h> |
| #include <openssl/md5.h> |
| #include <openssl/obj.h> |
| #include <openssl/rand.h> |
| #include <openssl/x509.h> |
| |
| #include "ssl_locl.h" |
| |
| 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 if (ver == DTLS1_2_VERSION) |
| return(DTLSv1_2_server_method()); |
| else |
| return(NULL); |
| } |
| |
| IMPLEMENT_dtls1_meth_func(DTLS1_VERSION, |
| DTLSv1_server_method, |
| dtls1_accept, |
| ssl_undefined_function, |
| dtls1_get_server_method, |
| DTLSv1_enc_data) |
| |
| IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION, |
| DTLSv1_2_server_method, |
| dtls1_accept, |
| ssl_undefined_function, |
| dtls1_get_server_method, |
| DTLSv1_2_enc_data) |
| |
| IMPLEMENT_dtls1_meth_func(DTLS_ANY_VERSION, |
| DTLS_server_method, |
| dtls1_accept, |
| ssl_undefined_function, |
| dtls1_get_server_method, |
| DTLSv1_2_enc_data) |
| |
| int dtls1_accept(SSL *s) |
| { |
| BUF_MEM *buf; |
| 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; |
| |
| ERR_clear_error(); |
| ERR_clear_system_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) |
| { |
| OPENSSL_PUT_ERROR(SSL, dtls1_accept, SSL_R_NO_CERTIFICATE_SET); |
| return(-1); |
| } |
| |
| #ifndef OPENSSL_NO_HEARTBEATS |
| /* If we're awaiting a HeartbeatResponse, pretend we |
| * already got and don't await it anymore, because |
| * Heartbeats don't make sense during handshakes anyway. |
| */ |
| if (s->tlsext_hb_pending) |
| { |
| dtls1_stop_timer(s); |
| s->tlsext_hb_pending = 0; |
| s->tlsext_hb_seq++; |
| } |
| #endif |
| |
| for (;;) |
| { |
| state=s->state; |
| |
| switch (s->state) |
| { |
| case SSL_ST_RENEGOTIATE: |
| s->renegotiate=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)) |
| { |
| OPENSSL_PUT_ERROR(SSL, 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 :-) |
| * ...but not with SCTP :-) |
| */ |
| 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_clear_record_buffer(s); |
| dtls1_start_timer(s); |
| ret=ssl3_send_hello_request(s); |
| if (ret <= 0) goto end; |
| s->s3->tmp.next_state=SSL3_ST_SR_CLNT_HELLO_A; |
| 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->renegotiate = 2; |
| dtls1_start_timer(s); |
| ret=ssl3_send_server_hello(s); |
| if (ret <= 0) goto end; |
| |
| if (s->hit) |
| { |
| #ifndef OPENSSL_NO_TLSEXT |
| if (s->tlsext_ticket_expected) |
| s->state=SSL3_ST_SW_SESSION_TICKET_A; |
| else |
| s->state=SSL3_ST_SW_CHANGE_A; |
| #else |
| 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=ssl3_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) |
| ) |
| /* 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=ssl3_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=ssl3_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=ssl3_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) |
| { |
| /* If the write error was fatal, stop trying */ |
| if (!BIO_should_retry(s->wbio)) |
| { |
| s->rwstate=SSL_NOTHING; |
| s->state=s->s3->tmp.next_state; |
| } |
| |
| 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; |
| if (ret == 2) |
| { |
| dtls1_stop_timer(s); |
| 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; |
| 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; |
| |
| 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 if (SSL_USE_SIGALGS(s)) |
| { |
| s->state=SSL3_ST_SR_CERT_VRFY_A; |
| s->init_num=0; |
| if (!s->session->peer) |
| break; |
| /* For sigalgs freeze the handshake buffer |
| * at this point and digest cached records. |
| */ |
| if (!s->s3->handshake_buffer) |
| { |
| OPENSSL_PUT_ERROR(SSL, dtls1_accept, ERR_R_INTERNAL_ERROR); |
| return -1; |
| } |
| s->s3->flags |= TLS1_FLAGS_KEEP_HANDSHAKE; |
| if (!ssl3_digest_cached_records(s)) |
| return -1; |
| } |
| 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; |
| 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=ssl3_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=ssl3_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->renegotiate == 2) /* skipped if we just sent a HelloRequest */ |
| { |
| s->renegotiate=0; |
| 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: |
| OPENSSL_PUT_ERROR(SSL, 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_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]); |
| /* Always use DTLS 1.0 version: see RFC 6347 */ |
| *(p++) = DTLS1_VERSION >> 8; |
| *(p++) = DTLS1_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) |
| { |
| OPENSSL_PUT_ERROR(SSL, 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)); |
| } |