#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)
{
ssl_undefined_function,
dtls1_get_server_method, DTLSv1_enc_data)
- IMPLEMENT_dtls1_meth_func(DTLS1_2_VERSION,
+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,
+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;
- 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;
-#ifndef OPENSSL_NO_SCTP
- unsigned char sctpauthkey[64];
- char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
-#endif
-
- 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)) {
- if (!SSL_clear(s))
- return -1;
- }
-
- s->d1->listen = listen;
-#ifndef OPENSSL_NO_SCTP
- /*
- * Notify SCTP BIO socket to enter handshake mode and prevent stream
- * identifier other than 0. Will be ignored if no SCTP is used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
- s->in_handshake, NULL);
-#endif
-
-#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)) {
- 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)) {
- BUF_MEM_free(buf);
- ret = -1;
- goto end;
- }
- s->init_buf = buf;
- }
-
- if (!ssl3_setup_buffers(s)) {
- ret = -1;
- goto end;
- }
-
- s->init_num = 0;
- s->d1->change_cipher_spec_ok = 0;
- /*
- * Should have been reset by ssl3_get_finished, too.
- */
- s->s3->change_cipher_spec = 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 :-)
- */
-#ifndef OPENSSL_NO_SCTP
- if (!BIO_dgram_is_sctp(SSL_get_wbio(s)))
-#endif
- 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) {
- DTLS_RECORD_LAYER_resync_write(&s->rlayer);
- }
-
- /* 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;
-
-#ifndef OPENSSL_NO_SCTP
- case DTLS1_SCTP_ST_SR_READ_SOCK:
-
- if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
- s->s3->in_read_app_data = 2;
- s->rwstate = SSL_READING;
- BIO_clear_retry_flags(SSL_get_rbio(s));
- BIO_set_retry_read(SSL_get_rbio(s));
- ret = -1;
- goto end;
- }
-
- s->state = SSL3_ST_SR_FINISHED_A;
- break;
-
- case DTLS1_SCTP_ST_SW_WRITE_SOCK:
- ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
- if (ret < 0)
- goto end;
-
- if (ret == 0) {
- if (s->d1->next_state != SSL_ST_OK) {
- s->s3->in_read_app_data = 2;
- s->rwstate = SSL_READING;
- BIO_clear_retry_flags(SSL_get_rbio(s));
- BIO_set_retry_read(SSL_get_rbio(s));
- ret = -1;
- goto end;
- }
- }
-
- s->state = s->d1->next_state;
- break;
-#endif
-
- 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_SCTP
- /*
- * Add new shared key for SCTP-Auth, will be ignored if no
- * SCTP used.
- */
- snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
- DTLS1_SCTP_AUTH_LABEL);
-
- SSL_export_keying_material(s, sctpauthkey,
- sizeof(sctpauthkey), labelbuffer,
- sizeof(labelbuffer), NULL, 0, 0);
-
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
- sizeof(sctpauthkey), sctpauthkey);
-#endif
-#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
- */
- s->s3->tmp.use_rsa_tmp = 0;
-
- /*
- * only send if a DH key exchange or RSA but we have a sign only
- * certificate
- */
- if (0
- /*
- * 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_kDHE)
- || (alg_k & SSL_kECDHE)
- || ((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;
-#ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
- s->d1->next_state = SSL3_ST_SW_SRVR_DONE_A;
- s->state = DTLS1_SCTP_ST_SW_WRITE_SOCK;
- }
-#endif
- } else {
- s->s3->tmp.cert_request = 1;
- dtls1_start_timer(s);
- ret = ssl3_send_certificate_request(s);
- if (ret <= 0)
- goto end;
- s->state = SSL3_ST_SW_SRVR_DONE_A;
-# ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
- s->d1->next_state = SSL3_ST_SW_SRVR_DONE_A;
- s->state = DTLS1_SCTP_ST_SW_WRITE_SOCK;
- }
-# 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:
- if (s->s3->tmp.cert_request) {
- 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;
-#ifndef OPENSSL_NO_SCTP
- /*
- * Add new shared key for SCTP-Auth, will be ignored if no SCTP
- * used.
- */
- snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL),
- DTLS1_SCTP_AUTH_LABEL);
-
- SSL_export_keying_material(s, sctpauthkey,
- sizeof(sctpauthkey), labelbuffer,
- sizeof(labelbuffer), NULL, 0, 0);
-
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
- sizeof(sctpauthkey), sctpauthkey);
-#endif
-
- 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;
- if (!s->s3->handshake_buffer) {
- SSLerr(SSL_F_DTLS1_ACCEPT, ERR_R_INTERNAL_ERROR);
- return -1;
- }
- /*
- * For sigalgs freeze the handshake buffer. If we support
- * extms we've done this already.
- */
- if (!(s->s3->flags & SSL_SESS_FLAG_EXTMS)) {
- 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:
- /*
- * This *should* be the first time we enable CCS, but be
- * extra careful about surrounding code changes. We need
- * to set this here because we don't know if we're
- * expecting a CertificateVerify or not.
- */
- if (!s->s3->change_cipher_spec)
- 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;
-#ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
- state == SSL_ST_RENEGOTIATE)
- s->state = DTLS1_SCTP_ST_SR_READ_SOCK;
- else
-#endif
- s->state = SSL3_ST_SR_FINISHED_A;
- s->init_num = 0;
- break;
-
- case SSL3_ST_SR_FINISHED_A:
- case SSL3_ST_SR_FINISHED_B:
- /*
- * Enable CCS for resumed handshakes.
- * In a full handshake, we end up here through
- * SSL3_ST_SR_CERT_VRFY_B, so change_cipher_spec_ok was
- * already set. Receiving a CCS clears the flag, so make
- * sure not to re-enable it to ban duplicates.
- * s->s3->change_cipher_spec is set when a CCS is
- * processed in d1_pkt.c, and remains set until
- * the client's Finished message is read.
- */
- if (!s->s3->change_cipher_spec)
- 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;
-
-#ifndef OPENSSL_NO_SCTP
- if (!s->hit) {
- /*
- * Change to new shared key of SCTP-Auth, will be ignored if
- * no SCTP used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
- 0, NULL);
- }
-#endif
- 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;
-
-#ifndef OPENSSL_NO_SCTP
- /*
- * Change to new shared key of SCTP-Auth, will be ignored if
- * no SCTP used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
- 0, NULL);
-#endif
- } else {
- s->s3->tmp.next_state = SSL_ST_OK;
-#ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
- s->d1->next_state = s->s3->tmp.next_state;
- s->s3->tmp.next_state = DTLS1_SCTP_ST_SW_WRITE_SOCK;
- }
-#endif
- }
- s->init_num = 0;
- break;
-
- case SSL_ST_OK:
- /* clean a few things up */
- ssl3_cleanup_key_block(s);
-
- /* 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:
- 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;
- }
+unsigned int dtls1_raw_hello_verify_request(unsigned char *buf,
+ unsigned char *cookie,
+ unsigned char cookie_len)
+{
+ unsigned int msg_len;
+ unsigned char *p;
- 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); */
+ p = buf;
+ /* Always use DTLS 1.0 version: see RFC 6347 */
+ *(p++) = DTLS1_VERSION >> 8;
+ *(p++) = DTLS1_VERSION & 0xFF;
- s->in_handshake--;
-#ifndef OPENSSL_NO_SCTP
- /*
- * Notify SCTP BIO socket to leave handshake mode and prevent stream
- * identifier other than 0. Will be ignored if no SCTP is used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE,
- s->in_handshake, NULL);
-#endif
+ *(p++) = (unsigned char)cookie_len;
+ memcpy(p, cookie, cookie_len);
+ p += cookie_len;
+ msg_len = p - buf;
- if (cb != NULL)
- cb(s, SSL_CB_ACCEPT_EXIT, ret);
- return (ret);
+ return msg_len;
}
-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) {
- SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,
- ERR_R_INTERNAL_ERROR);
- return 0;
- }
+int dtls_construct_hello_verify_request(SSL *s)
+{
+ unsigned int len;
+ unsigned char *buf;
+
+ buf = (unsigned char *)s->init_buf->data;
+
+ if (s->ctx->app_gen_cookie_cb == NULL ||
+ s->ctx->app_gen_cookie_cb(s, s->d1->cookie,
+ &(s->d1->cookie_len)) == 0 ||
+ s->d1->cookie_len > 255) {
+ SSLerr(SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST,
+ SSL_R_COOKIE_GEN_CALLBACK_FAILURE);
+ statem_set_error(s);
+ 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;
+ len = dtls1_raw_hello_verify_request(&buf[DTLS1_HM_HEADER_LENGTH],
+ s->d1->cookie, s->d1->cookie_len);
- dtls1_set_message_header(s, buf,
- DTLS1_MT_HELLO_VERIFY_REQUEST, msg_len, 0,
- msg_len);
+ dtls1_set_message_header(s, buf, DTLS1_MT_HELLO_VERIFY_REQUEST, len, 0,
+ len);
+ len += DTLS1_HM_HEADER_LENGTH;
- s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B;
- /* number of bytes to write */
- s->init_num = p - buf;
- s->init_off = 0;
- }
+ /* number of bytes to write */
+ s->init_num = len;
+ s->init_off = 0;
- /* s->state = DTLS1_ST_SW_HELLO_VERIFY_REQUEST_B */
- return (dtls1_do_write(s, SSL3_RT_HANDSHAKE));
+ return 1;
}
projects / openssl.git / blobdiff