return 0;
}
+/*
+ * ossl_statem_client_read_transition() encapsulates the logic for the allowed
+ * handshake state transitions when a TLS1.3 client is reading messages from the
+ * server. The message type that the server has sent is provided in |mt|. The
+ * current state is in |s->statem.hand_state|.
+ *
+ * Return values are 1 for success (transition allowed) and 0 on error
+ * (transition not allowed)
+ */
+static int ossl_statem_client13_read_transition(SSL *s, int mt)
+{
+ OSSL_STATEM *st = &s->statem;
+
+ /*
+ * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time
+ * we will update this to look more like real TLSv1.3
+ */
+
+ /*
+ * Note: There is no case for TLS_ST_CW_CLNT_HELLO, because we haven't
+ * yet negotiated TLSv1.3 at that point so that is handled by
+ * ossl_statem_client_read_transition()
+ */
+
+ switch (st->hand_state) {
+ default:
+ break;
+
+ case TLS_ST_CR_SRVR_HELLO:
+ if (s->hit) {
+ if (mt == SSL3_MT_FINISHED) {
+ st->hand_state = TLS_ST_CR_FINISHED;
+ return 1;
+ }
+ } else {
+ if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
+ st->hand_state = TLS_ST_CR_CERT_REQ;
+ return 1;
+ }
+ if (mt == SSL3_MT_CERTIFICATE) {
+ st->hand_state = TLS_ST_CR_CERT;
+ return 1;
+ }
+ }
+ break;
+
+ case TLS_ST_CR_CERT_REQ:
+ if (mt == SSL3_MT_CERTIFICATE) {
+ st->hand_state = TLS_ST_CR_CERT;
+ return 1;
+ }
+ break;
+
+ case TLS_ST_CR_CERT:
+ /*
+ * The CertificateStatus message is optional even if
+ * |tlsext_status_expected| is set
+ */
+ if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
+ st->hand_state = TLS_ST_CR_CERT_STATUS;
+ return 1;
+ }
+ /* Fall through */
+
+ case TLS_ST_CR_CERT_STATUS:
+ if (mt == SSL3_MT_FINISHED) {
+ st->hand_state = TLS_ST_CR_FINISHED;
+ return 1;
+ }
+ break;
+
+ }
+
+ /* No valid transition found */
+ return 0;
+}
+
/*
* ossl_statem_client_read_transition() encapsulates the logic for the allowed
* handshake state transitions when the client is reading messages from the
* server. The message type that the server has sent is provided in |mt|. The
* current state is in |s->statem.hand_state|.
*
- * Return values are:
- * 1: Success (transition allowed)
- * 0: Error (transition not allowed)
+ * Return values are 1 for success (transition allowed) and 0 on error
+ * (transition not allowed)
*/
int ossl_statem_client_read_transition(SSL *s, int mt)
{
OSSL_STATEM *st = &s->statem;
int ske_expected;
+ /*
+ * Note that after a ClientHello we don't know what version we are going
+ * to negotiate yet, so we don't take this branch until later
+ */
+ if (SSL_IS_TLS13(s)) {
+ if (!ossl_statem_client13_read_transition(s, mt))
+ goto err;
+ return 1;
+ }
+
switch (st->hand_state) {
default:
break;
}
/*
- * client_write_transition() works out what handshake state to move to next
- * when the client is writing messages to be sent to the server.
+ * ossl_statem_client13_write_transition() works out what handshake state to
+ * move to next when the TLSv1.3 client is writing messages to be sent to the
+ * server.
+ */
+static WRITE_TRAN ossl_statem_client13_write_transition(SSL *s)
+{
+ OSSL_STATEM *st = &s->statem;
+
+ /*
+ * TODO(TLS1.3): This is still based on the TLSv1.2 state machine. Over time
+ * we will update this to look more like real TLSv1.3
+ */
+
+ /*
+ * Note: There are no cases for TLS_ST_BEFORE or TLS_ST_CW_CLNT_HELLO,
+ * because we haven't negotiated TLSv1.3 yet at that point. They are
+ * handled by ossl_statem_client_write_transition().
+ */
+ switch (st->hand_state) {
+ default:
+ /* Shouldn't happen */
+ return WRITE_TRAN_ERROR;
+
+ case TLS_ST_CR_FINISHED:
+ st->hand_state = (s->s3->tmp.cert_req != 0) ? TLS_ST_CW_CERT
+ : TLS_ST_CW_FINISHED;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_CERT:
+ /* If a non-empty Certificate we also send CertificateVerify */
+ st->hand_state = (s->s3->tmp.cert_req == 1) ? TLS_ST_CW_CERT_VRFY
+ : TLS_ST_CW_FINISHED;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_CERT_VRFY:
+ st->hand_state = TLS_ST_CW_FINISHED;
+ return WRITE_TRAN_CONTINUE;
+
+ case TLS_ST_CW_FINISHED:
+ st->hand_state = TLS_ST_OK;
+ ossl_statem_set_in_init(s, 0);
+ return WRITE_TRAN_CONTINUE;
+ }
+}
+
+/*
+ * ossl_statem_client_write_transition() works out what handshake state to
+ * move to next when the client is writing messages to be sent to the server.
*/
WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
{
OSSL_STATEM *st = &s->statem;
+ /*
+ * Note that immediately before/after a ClientHello we don't know what
+ * version we are going to negotiate yet, so we don't take this branch until
+ * later
+ */
+ if (SSL_IS_TLS13(s))
+ return ossl_statem_client13_write_transition(s);
+
switch (st->hand_state) {
default:
/* Shouldn't happen */
#endif
if (statem_flush(s) != 1)
return WORK_MORE_B;
+
+ if (SSL_IS_TLS13(s)) {
+ if (!s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_CLIENT_WRITE))
+ return WORK_ERROR;
+ }
break;
}
* For TLS 1.3 we always set the ClientHello version to 1.2 and rely on the
* supported_versions extension for the real supported versions.
*/
- if (!WPACKET_put_bytes_u16(pkt,
- (!SSL_IS_DTLS(s)
- && s->client_version >= TLS1_3_VERSION)
- ? TLS1_2_VERSION : s->client_version)
+ if (!WPACKET_put_bytes_u16(pkt, s->client_version)
|| !WPACKET_memcpy(pkt, s->s3->client_random, SSL3_RANDOM_SIZE)) {
SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
return 0;
}
#endif
+ /*
+ * In TLSv1.3 we have some post-processing to change cipher state, otherwise
+ * we're done with this message
+ */
+ if (SSL_IS_TLS13(s)
+ && (!s->method->ssl3_enc->setup_key_block(s)
+ || !s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_WRITE)
+ || !s->method->ssl3_enc->change_cipher_state(s,
+ SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_CLIENT_READ))) {
+ al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_CANNOT_CHANGE_CIPHER);
+ goto f_err;
+ }
+
return MSG_PROCESS_CONTINUE_READING;
f_err:
ssl3_send_alert(s, SSL3_AL_FATAL, al);
return MSG_PROCESS_ERROR;
}
-MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
+/*
+ * Perform miscellaneous checks and processing after we have received the
+ * server's initial flight. In TLS1.3 this is after the Server Finished message.
+ * In <=TLS1.2 this is after the ServerDone message. Returns 1 on success or 0
+ * on failure.
+ */
+int tls_process_initial_server_flight(SSL *s, int *al)
{
- if (PACKET_remaining(pkt) > 0) {
- /* should contain no data */
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
-#ifndef OPENSSL_NO_SRP
- if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
- if (SRP_Calc_A_param(s) <= 0) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- }
-#endif
-
/*
* at this point we check that we have the required stuff from
* the server
*/
if (!ssl3_check_cert_and_algorithm(s)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ return 0;
}
/*
int ret;
ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
if (ret == 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL,
- SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
+ *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
+ SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT,
SSL_R_INVALID_STATUS_RESPONSE);
- return MSG_PROCESS_ERROR;
+ return 0;
}
if (ret < 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
- return MSG_PROCESS_ERROR;
+ *al = SSL_AD_INTERNAL_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_INITIAL_SERVER_FLIGHT,
+ ERR_R_MALLOC_FAILURE);
+ return 0;
}
}
#ifndef OPENSSL_NO_CT
if (s->ct_validation_callback != NULL) {
/* Note we validate the SCTs whether or not we abort on error */
if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- return MSG_PROCESS_ERROR;
+ *al = SSL_AD_HANDSHAKE_FAILURE;
+ return 0;
+ }
+ }
+#endif
+
+ return 1;
+}
+
+MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
+{
+ int al = SSL_AD_INTERNAL_ERROR;
+
+ if (PACKET_remaining(pkt) > 0) {
+ /* should contain no data */
+ al = SSL_AD_DECODE_ERROR;
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
+ goto err;
+ }
+#ifndef OPENSSL_NO_SRP
+ if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
+ if (SRP_Calc_A_param(s) <= 0) {
+ SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
+ goto err;
}
}
#endif
+ /*
+ * Error queue messages are generated directly by this function
+ */
+ if (!tls_process_initial_server_flight(s, &al))
+ goto err;
+
#ifndef OPENSSL_NO_SCTP
/* Only applies to renegotiation */
if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
else
#endif
return MSG_PROCESS_FINISHED_READING;
+
+ err:
+ ssl3_send_alert(s, SSL3_AL_FATAL, al);
+ ossl_statem_set_error(s);
+ return MSG_PROCESS_ERROR;
}
static int tls_construct_cke_psk_preamble(SSL *s, WPACKET *pkt, int *al)
ckey = ssl_generate_pkey(skey);
dh_clnt = EVP_PKEY_get0_DH(ckey);
- if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0)
+ if (dh_clnt == NULL || ssl_derive(s, ckey, skey, 0) == 0)
goto err;
/* send off the data */
ckey = ssl_generate_pkey(skey);
- if (ssl_derive(s, ckey, skey) == 0) {
+ if (ssl_derive(s, ckey, skey, 0) == 0) {
SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
goto err;
}
SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
goto err;
}
+
if (SSL_USE_SIGALGS(s)&& !tls12_get_sigandhash(pkt, pkey, md)) {
SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
goto err;
projects / openssl.git / blobdiff