diff options
author | Dr. Stephen Henson <steve@openssl.org> | 2011-12-25 14:45:40 +0000 |
---|---|---|
committer | Dr. Stephen Henson <steve@openssl.org> | 2011-12-25 14:45:40 +0000 |
commit | e065e6cda2afd77c272992bb2bca382ce617ca27 (patch) | |
tree | 7bed179fe0cb8ac7db86eae0c60fe3e829c70593 /ssl/d1_srvr.c | |
parent | 60553cc2091498c82bc39072b5c30777ae5592cb (diff) |
PR: 2535
Submitted by: Robin Seggelmann <seggelmann@fh-muenster.de>
Reviewed by: steve
Add SCTP support for DTLS (RFC 6083).
Diffstat (limited to 'ssl/d1_srvr.c')
-rw-r--r-- | ssl/d1_srvr.c | 152 |
1 files changed, 145 insertions, 7 deletions
diff --git a/ssl/d1_srvr.c b/ssl/d1_srvr.c index 360f873463..24e0553086 100644 --- a/ssl/d1_srvr.c +++ b/ssl/d1_srvr.c @@ -151,6 +151,10 @@ int dtls1_accept(SSL *s) 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(); @@ -168,6 +172,13 @@ int dtls1_accept(SSL *s) if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 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 if (s->cert == NULL) { @@ -227,8 +238,12 @@ int dtls1_accept(SSL *s) { /* 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; } +#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; @@ -313,6 +328,43 @@ int dtls1_accept(SSL *s) 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; @@ -320,18 +372,31 @@ int dtls1_accept(SSL *s) ret=dtls1_send_server_hello(s); if (ret <= 0) goto end; -#ifndef OPENSSL_NO_TLSEXT 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 - if (s->hit) - s->state=SSL3_ST_SW_CHANGE_A; + s->state=SSL3_ST_SW_CHANGE_A; #endif + } else s->state=SSL3_ST_SW_CERT_A; s->init_num=0; @@ -441,6 +506,13 @@ int dtls1_accept(SSL *s) 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 { @@ -450,9 +522,23 @@ int dtls1_accept(SSL *s) if (ret <= 0) goto end; #ifndef NETSCAPE_HANG_BUG 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->state=SSL3_ST_SW_FLUSH; s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; +#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 #endif s->init_num=0; } @@ -472,6 +558,13 @@ int dtls1_accept(SSL *s) 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; } @@ -504,6 +597,21 @@ int dtls1_accept(SSL *s) ret=ssl3_get_client_key_exchange(s); if (ret <= 0) goto end; dtls1_stop_timer(s); +#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; @@ -541,8 +649,13 @@ int dtls1_accept(SSL *s) ret=ssl3_get_cert_verify(s); if (ret <= 0) goto end; dtls1_stop_timer(s); - - s->state=SSL3_ST_SR_FINISHED_A; +#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; @@ -594,6 +707,14 @@ int dtls1_accept(SSL *s) SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); if (ret <= 0) goto end; + +#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 + s->state=SSL3_ST_SW_FINISHED_A; s->init_num=0; @@ -618,7 +739,16 @@ int dtls1_accept(SSL *s) if (s->hit) s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; 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; @@ -690,6 +820,14 @@ end: /* BIO_flush(s->wbio); */ 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 + if (cb != NULL) cb(s,SSL_CB_ACCEPT_EXIT,ret); return(ret); |