#include <stdio.h>
#include "ssl_locl.h"
-#ifndef OPENSSL_NO_KRB5
-# include "kssl_lcl.h"
-#endif
#include <openssl/buffer.h>
#include <openssl/rand.h>
#include <openssl/objects.h>
#endif
static const SSL_METHOD *dtls1_get_client_method(int ver);
-static int dtls1_get_hello_verify(SSL *s);
static const SSL_METHOD *dtls1_get_client_method(int ver)
{
dtls1_connect,
dtls1_get_client_method, DTLSv1_2_enc_data)
-int dtls1_connect(SSL *s)
-{
- BUF_MEM *buf = NULL;
- unsigned long Time = (unsigned long)time(NULL);
- void (*cb) (const SSL *ssl, int type, int val) = NULL;
- int ret = -1;
- int new_state, state, skip = 0;
-#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;
-
- s->in_handshake++;
- if (!SSL_in_init(s) || SSL_in_before(s))
- SSL_clear(s);
-
-#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_CONNECT;
- s->ctx->stats.sess_connect_renegotiate++;
- /* break */
- case SSL_ST_BEFORE:
- case SSL_ST_CONNECT:
- case SSL_ST_BEFORE | SSL_ST_CONNECT:
- case SSL_ST_OK | SSL_ST_CONNECT:
-
- s->server = 0;
- if (cb != NULL)
- cb(s, SSL_CB_HANDSHAKE_START, 1);
-
- if ((s->version & 0xff00) != (DTLS1_VERSION & 0xff00) &&
- (s->version & 0xff00) != (DTLS1_BAD_VER & 0xff00)) {
- SSLerr(SSL_F_DTLS1_CONNECT, ERR_R_INTERNAL_ERROR);
- ret = -1;
- goto end;
- }
-
- /* s->version=SSL3_VERSION; */
- s->type = SSL_ST_CONNECT;
-
- 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;
- buf = NULL;
- }
-
- if (!ssl3_setup_buffers(s)) {
- ret = -1;
- goto end;
- }
-
- /* setup buffing BIO */
- if (!ssl_init_wbio_buffer(s, 0)) {
- ret = -1;
- goto end;
- }
-
- /* don't push the buffering BIO quite yet */
-
- s->state = SSL3_ST_CW_CLNT_HELLO_A;
- s->ctx->stats.sess_connect++;
- s->init_num = 0;
- /* mark client_random uninitialized */
- memset(s->s3->client_random, 0, sizeof(s->s3->client_random));
- s->d1->send_cookie = 0;
- s->hit = 0;
- s->d1->change_cipher_spec_ok = 0;
- /*
- * Should have been reset by ssl3_get_finished, too.
- */
- s->s3->change_cipher_spec = 0;
- break;
-
-#ifndef OPENSSL_NO_SCTP
- case DTLS1_SCTP_ST_CR_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 = s->s3->tmp.next_state;
- break;
-
- case DTLS1_SCTP_ST_CW_WRITE_SOCK:
- /* read app data until dry event */
-
- ret = BIO_dgram_sctp_wait_for_dry(SSL_get_wbio(s));
- if (ret < 0)
- goto end;
-
- if (ret == 0) {
- 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_CW_CLNT_HELLO_A:
- case SSL3_ST_CW_CLNT_HELLO_B:
-
- s->shutdown = 0;
-
- /* every DTLS ClientHello resets Finished MAC */
- ssl3_init_finished_mac(s);
-
- dtls1_start_timer(s);
- ret = ssl3_client_hello(s);
- if (ret <= 0)
- goto end;
-
- if (s->d1->send_cookie) {
- s->state = SSL3_ST_CW_FLUSH;
- s->s3->tmp.next_state = SSL3_ST_CR_SRVR_HELLO_A;
- } else
- s->state = SSL3_ST_CR_SRVR_HELLO_A;
-
- s->init_num = 0;
-
-#ifndef OPENSSL_NO_SCTP
- /* Disable buffering for SCTP */
- if (!BIO_dgram_is_sctp(SSL_get_wbio(s))) {
-#endif
- /*
- * turn on buffering for the next lot of output
- */
- if (s->bbio != s->wbio)
- s->wbio = BIO_push(s->bbio, s->wbio);
-#ifndef OPENSSL_NO_SCTP
- }
-#endif
-
- break;
-
- case SSL3_ST_CR_SRVR_HELLO_A:
- case SSL3_ST_CR_SRVR_HELLO_B:
- ret = ssl3_get_server_hello(s);
- if (ret <= 0)
- goto end;
- else {
- 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
-
- s->state = SSL3_ST_CR_FINISHED_A;
- } else
- s->state = DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A;
- }
- s->init_num = 0;
- break;
-
- case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A:
- case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B:
-
- ret = dtls1_get_hello_verify(s);
- if (ret <= 0)
- goto end;
- dtls1_stop_timer(s);
- if (s->d1->send_cookie) /* start again, with a cookie */
- s->state = SSL3_ST_CW_CLNT_HELLO_A;
- else
- s->state = SSL3_ST_CR_CERT_A;
- s->init_num = 0;
- break;
-
- case SSL3_ST_CR_CERT_A:
- case SSL3_ST_CR_CERT_B:
- /* Check if it is anon DH or PSK */
- if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
- !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
- ret = ssl3_get_server_certificate(s);
- if (ret <= 0)
- goto end;
-#ifndef OPENSSL_NO_TLSEXT
- if (s->tlsext_status_expected)
- s->state = SSL3_ST_CR_CERT_STATUS_A;
- else
- s->state = SSL3_ST_CR_KEY_EXCH_A;
- } else {
- skip = 1;
- s->state = SSL3_ST_CR_KEY_EXCH_A;
- }
-#else
- } else
- skip = 1;
-
- s->state = SSL3_ST_CR_KEY_EXCH_A;
-#endif
- s->init_num = 0;
- break;
-
- case SSL3_ST_CR_KEY_EXCH_A:
- case SSL3_ST_CR_KEY_EXCH_B:
- ret = ssl3_get_key_exchange(s);
- if (ret <= 0)
- goto end;
- s->state = SSL3_ST_CR_CERT_REQ_A;
- s->init_num = 0;
-
- /*
- * at this point we check that we have the required stuff from
- * the server
- */
- if (!ssl3_check_cert_and_algorithm(s)) {
- ret = -1;
- goto end;
- }
- break;
-
- case SSL3_ST_CR_CERT_REQ_A:
- case SSL3_ST_CR_CERT_REQ_B:
- ret = ssl3_get_certificate_request(s);
- if (ret <= 0)
- goto end;
- s->state = SSL3_ST_CR_SRVR_DONE_A;
- s->init_num = 0;
- break;
-
- case SSL3_ST_CR_SRVR_DONE_A:
- case SSL3_ST_CR_SRVR_DONE_B:
- ret = ssl3_get_server_done(s);
- if (ret <= 0)
- goto end;
- dtls1_stop_timer(s);
- if (s->s3->tmp.cert_req)
- s->s3->tmp.next_state = SSL3_ST_CW_CERT_A;
- else
- s->s3->tmp.next_state = SSL3_ST_CW_KEY_EXCH_A;
- s->init_num = 0;
-
-#ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
- state == SSL_ST_RENEGOTIATE)
- s->state = DTLS1_SCTP_ST_CR_READ_SOCK;
- else
-#endif
- s->state = s->s3->tmp.next_state;
- break;
-
- case SSL3_ST_CW_CERT_A:
- case SSL3_ST_CW_CERT_B:
- case SSL3_ST_CW_CERT_C:
- case SSL3_ST_CW_CERT_D:
- dtls1_start_timer(s);
- ret = ssl3_send_client_certificate(s);
- if (ret <= 0)
- goto end;
- s->state = SSL3_ST_CW_KEY_EXCH_A;
- s->init_num = 0;
- break;
-
- case SSL3_ST_CW_KEY_EXCH_A:
- case SSL3_ST_CW_KEY_EXCH_B:
- dtls1_start_timer(s);
- ret = ssl3_send_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
-
- /*
- * EAY EAY EAY need to check for DH fix cert sent back
- */
- /*
- * For TLS, cert_req is set to 2, so a cert chain of nothing is
- * sent, but no verify packet is sent
- */
- if (s->s3->tmp.cert_req == 1) {
- s->state = SSL3_ST_CW_CERT_VRFY_A;
- } else {
-#ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
- s->d1->next_state = SSL3_ST_CW_CHANGE_A;
- s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
- } else
-#endif
- s->state = SSL3_ST_CW_CHANGE_A;
- }
-
- s->init_num = 0;
- break;
-
- case SSL3_ST_CW_CERT_VRFY_A:
- case SSL3_ST_CW_CERT_VRFY_B:
- dtls1_start_timer(s);
- ret = ssl3_send_client_verify(s);
- if (ret <= 0)
- goto end;
-#ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
- s->d1->next_state = SSL3_ST_CW_CHANGE_A;
- s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
- } else
-#endif
- s->state = SSL3_ST_CW_CHANGE_A;
- s->init_num = 0;
- break;
-
- case SSL3_ST_CW_CHANGE_A:
- case SSL3_ST_CW_CHANGE_B:
- if (!s->hit)
- dtls1_start_timer(s);
- ret = dtls1_send_change_cipher_spec(s,
- SSL3_ST_CW_CHANGE_A,
- SSL3_ST_CW_CHANGE_B);
- if (ret <= 0)
- goto end;
-
- s->state = SSL3_ST_CW_FINISHED_A;
- s->init_num = 0;
-
- s->session->cipher = s->s3->tmp.new_cipher;
-#ifdef OPENSSL_NO_COMP
- s->session->compress_meth = 0;
-#else
- if (s->s3->tmp.new_compression == NULL)
- s->session->compress_meth = 0;
- else
- s->session->compress_meth = s->s3->tmp.new_compression->id;
-#endif
- if (!s->method->ssl3_enc->setup_key_block(s)) {
- ret = -1;
- goto end;
- }
-
- if (!s->method->ssl3_enc->change_cipher_state(s,
- SSL3_CHANGE_CIPHER_CLIENT_WRITE))
- {
- ret = -1;
- 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
-
- dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
- break;
-
- case SSL3_ST_CW_FINISHED_A:
- case SSL3_ST_CW_FINISHED_B:
- if (!s->hit)
- dtls1_start_timer(s);
- ret = ssl3_send_finished(s,
- SSL3_ST_CW_FINISHED_A,
- SSL3_ST_CW_FINISHED_B,
- s->method->
- ssl3_enc->client_finished_label,
- s->method->
- ssl3_enc->client_finished_label_len);
- if (ret <= 0)
- goto end;
- s->state = SSL3_ST_CW_FLUSH;
-
- /* clear flags */
- s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER;
- if (s->hit) {
- 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_CW_WRITE_SOCK;
- }
-#endif
- if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) {
- s->state = SSL_ST_OK;
-#ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s))) {
- s->d1->next_state = SSL_ST_OK;
- s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
- }
-#endif
- s->s3->flags |= SSL3_FLAGS_POP_BUFFER;
- s->s3->delay_buf_pop_ret = 0;
- }
- } else {
-#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
-
-#ifndef OPENSSL_NO_TLSEXT
- /*
- * Allow NewSessionTicket if ticket expected
- */
- if (s->tlsext_ticket_expected)
- s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A;
- else
-#endif
-
- s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A;
- }
- s->init_num = 0;
- break;
-
-#ifndef OPENSSL_NO_TLSEXT
- case SSL3_ST_CR_SESSION_TICKET_A:
- case SSL3_ST_CR_SESSION_TICKET_B:
- ret = ssl3_get_new_session_ticket(s);
- if (ret <= 0)
- goto end;
- s->state = SSL3_ST_CR_FINISHED_A;
- s->init_num = 0;
- break;
-
- case SSL3_ST_CR_CERT_STATUS_A:
- case SSL3_ST_CR_CERT_STATUS_B:
- ret = ssl3_get_cert_status(s);
- if (ret <= 0)
- goto end;
- s->state = SSL3_ST_CR_KEY_EXCH_A;
- s->init_num = 0;
- break;
-#endif
-
- case SSL3_ST_CR_FINISHED_A:
- case SSL3_ST_CR_FINISHED_B:
- s->d1->change_cipher_spec_ok = 1;
- ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A,
- SSL3_ST_CR_FINISHED_B);
- if (ret <= 0)
- goto end;
- dtls1_stop_timer(s);
-
- if (s->hit)
- s->state = SSL3_ST_CW_CHANGE_A;
- else
- s->state = SSL_ST_OK;
-
-#ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s)) &&
- state == SSL_ST_RENEGOTIATE) {
- s->d1->next_state = s->state;
- s->state = DTLS1_SCTP_ST_CW_WRITE_SOCK;
- }
-#endif
-
- s->init_num = 0;
- break;
-
- case SSL3_ST_CW_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 SSL_ST_OK:
- /* clean a few things up */
- ssl3_cleanup_key_block(s);
-
-#if 0
- if (s->init_buf != NULL) {
- BUF_MEM_free(s->init_buf);
- s->init_buf = NULL;
- }
-#endif
-
- /*
- * If we are not 'joining' the last two packets, remove the
- * buffering now
- */
- if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
- ssl_free_wbio_buffer(s);
- /* else do it later in ssl3_write */
-
- s->init_num = 0;
- s->renegotiate = 0;
- s->new_session = 0;
-
- ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
- if (s->hit)
- s->ctx->stats.sess_hit++;
-
- ret = 1;
- /* s->server=0; */
- s->handshake_func = dtls1_connect;
- s->ctx->stats.sess_connect_good++;
-
- if (cb != NULL)
- cb(s, SSL_CB_HANDSHAKE_DONE, 1);
-
- /* done with handshaking */
- s->d1->handshake_read_seq = 0;
- s->d1->next_handshake_write_seq = 0;
- goto end;
- /* break; */
-
- default:
- SSLerr(SSL_F_DTLS1_CONNECT, SSL_R_UNKNOWN_STATE);
- ret = -1;
- goto end;
- /* break; */
- }
-
- /* did we do anything */
- 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_CONNECT_LOOP, 1);
- s->state = new_state;
- }
- }
- skip = 0;
- }
- end:
- s->in_handshake--;
-
-#ifndef OPENSSL_NO_SCTP
- /*
- * Notify SCTP BIO socket to leave handshake mode and allow 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
-
- if (buf != NULL)
- BUF_MEM_free(buf);
- if (cb != NULL)
- cb(s, SSL_CB_CONNECT_EXIT, ret);
- return (ret);
-}
-
-static int dtls1_get_hello_verify(SSL *s)
+enum MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, unsigned long n)
{
- int n, al, ok = 0;
+ int al;
unsigned char *data;
unsigned int cookie_len;
- s->first_packet = 1;
- n = s->method->ssl_get_message(s,
- DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A,
- DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B,
- -1, s->max_cert_list, &ok);
- s->first_packet = 0;
-
- if (!ok)
- return ((int)n);
-
- if (s->s3->tmp.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) {
- s->d1->send_cookie = 0;
- s->s3->tmp.reuse_message = 1;
- return (1);
- }
-
data = (unsigned char *)s->init_msg;
-#if 0
- if (s->method->version != DTLS_ANY_VERSION &&
- ((data[0] != (s->version >> 8)) || (data[1] != (s->version & 0xff))))
- {
- SSLerr(SSL_F_DTLS1_GET_HELLO_VERIFY, SSL_R_WRONG_SSL_VERSION);
- s->version = (s->version & 0xff00) | data[1];
- al = SSL_AD_PROTOCOL_VERSION;
- goto f_err;
- }
-#endif
data += 2;
cookie_len = *(data++);
memcpy(s->d1->cookie, data, cookie_len);
s->d1->cookie_len = cookie_len;
- s->d1->send_cookie = 1;
- return 1;
-
+ return MSG_PROCESS_FINISHED_READING;
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
- return -1;
+ statem_set_error(s);
+ return MSG_PROCESS_ERROR;
}
projects / openssl.git / blobdiff