X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fstatem%2Fstatem_srvr.c;h=9c44be0301c1f6c42627d6d5be28cbf101c8207f;hp=9c422e47527ba0e8fd17306ffb373ba322b8e001;hb=e880d4e58d1afe4d6e2d76646a8fbbe95fe05d40;hpb=6b1bb98fad044a6f6b1aec9daee95d6cb450210e diff --git a/ssl/statem/statem_srvr.c b/ssl/statem/statem_srvr.c index 9c422e4752..9c44be0301 100644 --- a/ssl/statem/statem_srvr.c +++ b/ssl/statem/statem_srvr.c @@ -1,5 +1,7 @@ /* - * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. + * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved + * Copyright 2005 Nokia. All rights reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy @@ -7,50 +9,11 @@ * https://www.openssl.org/source/license.html */ -/* ==================================================================== - * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. - * - * Portions of the attached software ("Contribution") are developed by - * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. - * - * The Contribution is licensed pursuant to the OpenSSL open source - * license provided above. - * - * ECC cipher suite support in OpenSSL originally written by - * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. - * - */ -/* ==================================================================== - * Copyright 2005 Nokia. All rights reserved. - * - * The portions of the attached software ("Contribution") is developed by - * Nokia Corporation and is licensed pursuant to the OpenSSL open source - * license. - * - * The Contribution, originally written by Mika Kousa and Pasi Eronen of - * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites - * support (see RFC 4279) to OpenSSL. - * - * No patent licenses or other rights except those expressly stated in - * the OpenSSL open source license shall be deemed granted or received - * expressly, by implication, estoppel, or otherwise. - * - * No assurances are provided by Nokia that the Contribution does not - * infringe the patent or other intellectual property rights of any third - * party or that the license provides you with all the necessary rights - * to make use of the Contribution. - * - * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN - * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA - * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY - * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR - * OTHERWISE. - */ - #include #include "../ssl_locl.h" #include "statem_locl.h" #include "internal/constant_time_locl.h" +#include "internal/cryptlib.h" #include #include #include @@ -61,8 +24,9 @@ #include #include +#define TICKET_NONCE_SIZE 8 + static int tls_construct_encrypted_extensions(SSL *s, WPACKET *pkt); -static int tls_construct_hello_retry_request(SSL *s, WPACKET *pkt); /* * ossl_statem_server13_read_transition() encapsulates the logic for the allowed @@ -86,13 +50,23 @@ static int ossl_statem_server13_read_transition(SSL *s, int mt) default: break; - case TLS_ST_SW_HELLO_RETRY_REQUEST: - if (mt == SSL3_MT_CLIENT_HELLO) { - st->hand_state = TLS_ST_SR_CLNT_HELLO; - return 1; + case TLS_ST_EARLY_DATA: + if (s->hello_retry_request == SSL_HRR_PENDING) { + if (mt == SSL3_MT_CLIENT_HELLO) { + st->hand_state = TLS_ST_SR_CLNT_HELLO; + return 1; + } + break; + } else if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { + if (mt == SSL3_MT_END_OF_EARLY_DATA) { + st->hand_state = TLS_ST_SR_END_OF_EARLY_DATA; + return 1; + } + break; } - break; + /* Fall through */ + case TLS_ST_SR_END_OF_EARLY_DATA: case TLS_ST_SW_FINISHED: if (s->s3->tmp.cert_request) { if (mt == SSL3_MT_CERTIFICATE) { @@ -129,6 +103,19 @@ static int ossl_statem_server13_read_transition(SSL *s, int mt) break; case TLS_ST_OK: + /* + * Its never ok to start processing handshake messages in the middle of + * early data (i.e. before we've received the end of early data alert) + */ + if (s->early_data_state == SSL_EARLY_DATA_READING) + break; + + if (mt == SSL3_MT_CERTIFICATE + && s->post_handshake_auth == SSL_PHA_REQUESTED) { + st->hand_state = TLS_ST_SR_CERT; + return 1; + } + if (mt == SSL3_MT_KEY_UPDATE) { st->hand_state = TLS_ST_SR_KEY_UPDATE; return 1; @@ -137,9 +124,6 @@ static int ossl_statem_server13_read_transition(SSL *s, int mt) } /* No valid transition found */ - ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); - SSLerr(SSL_F_OSSL_STATEM_SERVER13_READ_TRANSITION, - SSL_R_UNEXPECTED_MESSAGE); return 0; } @@ -196,10 +180,9 @@ int ossl_statem_server_read_transition(SSL *s, int mt) * not going to accept it because we require a client * cert. */ - ssl3_send_alert(s, SSL3_AL_FATAL, - SSL3_AD_HANDSHAKE_FAILURE); - SSLerr(SSL_F_OSSL_STATEM_SERVER_READ_TRANSITION, - SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_OSSL_STATEM_SERVER_READ_TRANSITION, + SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); return 0; } st->hand_state = TLS_ST_SR_KEY_EXCH; @@ -296,8 +279,23 @@ int ossl_statem_server_read_transition(SSL *s, int mt) err: /* No valid transition found */ - ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE); - SSLerr(SSL_F_OSSL_STATEM_SERVER_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE); + if (SSL_IS_DTLS(s) && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { + BIO *rbio; + + /* + * CCS messages don't have a message sequence number so this is probably + * because of an out-of-order CCS. We'll just drop it. + */ + s->init_num = 0; + s->rwstate = SSL_READING; + rbio = SSL_get_rbio(s); + BIO_clear_retry_flags(rbio); + BIO_set_retry_read(rbio); + return 0; + } + SSLfatal(s, SSL3_AD_UNEXPECTED_MESSAGE, + SSL_F_OSSL_STATEM_SERVER_READ_TRANSITION, + SSL_R_UNEXPECTED_MESSAGE); return 0; } @@ -350,16 +348,22 @@ static int send_server_key_exchange(SSL *s) * 1: Yes * 0: No */ -static int send_certificate_request(SSL *s) +int send_certificate_request(SSL *s) { if ( /* don't request cert unless asked for it: */ s->verify_mode & SSL_VERIFY_PEER + /* + * don't request if post-handshake-only unless doing + * post-handshake in TLSv1.3: + */ + && (!SSL_IS_TLS13(s) || !(s->verify_mode & SSL_VERIFY_POST_HANDSHAKE) + || s->post_handshake_auth == SSL_PHA_REQUEST_PENDING) /* * if SSL_VERIFY_CLIENT_ONCE is set, don't request cert - * during re-negotiation: + * a second time: */ - && (s->s3->tmp.finish_md_len == 0 || + && (s->certreqs_sent < 1 || !(s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) /* * never request cert in anonymous ciphersuites (see @@ -403,6 +407,9 @@ static WRITE_TRAN ossl_statem_server13_write_transition(SSL *s) switch (st->hand_state) { default: /* Shouldn't happen */ + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_OSSL_STATEM_SERVER13_WRITE_TRANSITION, + ERR_R_INTERNAL_ERROR); return WRITE_TRAN_ERROR; case TLS_ST_OK: @@ -410,21 +417,32 @@ static WRITE_TRAN ossl_statem_server13_write_transition(SSL *s) st->hand_state = TLS_ST_SW_KEY_UPDATE; return WRITE_TRAN_CONTINUE; } + if (s->post_handshake_auth == SSL_PHA_REQUEST_PENDING) { + st->hand_state = TLS_ST_SW_CERT_REQ; + return WRITE_TRAN_CONTINUE; + } /* Try to read from the client instead */ return WRITE_TRAN_FINISHED; case TLS_ST_SR_CLNT_HELLO: - if (s->hello_retry_request) - st->hand_state = TLS_ST_SW_HELLO_RETRY_REQUEST; - else - st->hand_state = TLS_ST_SW_SRVR_HELLO; + st->hand_state = TLS_ST_SW_SRVR_HELLO; return WRITE_TRAN_CONTINUE; - case TLS_ST_SW_HELLO_RETRY_REQUEST: - return WRITE_TRAN_FINISHED; - case TLS_ST_SW_SRVR_HELLO: - st->hand_state = TLS_ST_SW_ENCRYPTED_EXTENSIONS; + if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 + && s->hello_retry_request != SSL_HRR_COMPLETE) + st->hand_state = TLS_ST_SW_CHANGE; + else if (s->hello_retry_request == SSL_HRR_PENDING) + st->hand_state = TLS_ST_EARLY_DATA; + else + st->hand_state = TLS_ST_SW_ENCRYPTED_EXTENSIONS; + return WRITE_TRAN_CONTINUE; + + case TLS_ST_SW_CHANGE: + if (s->hello_retry_request == SSL_HRR_PENDING) + st->hand_state = TLS_ST_EARLY_DATA; + else + st->hand_state = TLS_ST_SW_ENCRYPTED_EXTENSIONS; return WRITE_TRAN_CONTINUE; case TLS_ST_SW_ENCRYPTED_EXTENSIONS: @@ -438,7 +456,12 @@ static WRITE_TRAN ossl_statem_server13_write_transition(SSL *s) return WRITE_TRAN_CONTINUE; case TLS_ST_SW_CERT_REQ: - st->hand_state = TLS_ST_SW_CERT; + if (s->post_handshake_auth == SSL_PHA_REQUEST_PENDING) { + s->post_handshake_auth = SSL_PHA_REQUESTED; + st->hand_state = TLS_ST_OK; + } else { + st->hand_state = TLS_ST_SW_CERT; + } return WRITE_TRAN_CONTINUE; case TLS_ST_SW_CERT: @@ -450,18 +473,32 @@ static WRITE_TRAN ossl_statem_server13_write_transition(SSL *s) return WRITE_TRAN_CONTINUE; case TLS_ST_SW_FINISHED: + st->hand_state = TLS_ST_EARLY_DATA; + return WRITE_TRAN_CONTINUE; + + case TLS_ST_EARLY_DATA: return WRITE_TRAN_FINISHED; case TLS_ST_SR_FINISHED: /* * Technically we have finished the handshake at this point, but we're - * going to remain "in_init" for now and write out the session ticket + * going to remain "in_init" for now and write out any session tickets * immediately. - * TODO(TLS1.3): Perhaps we need to be able to control this behaviour - * and give the application the opportunity to delay sending the - * session ticket? */ - st->hand_state = TLS_ST_SW_SESSION_TICKET; + if (s->post_handshake_auth == SSL_PHA_REQUESTED) { + s->post_handshake_auth = SSL_PHA_EXT_RECEIVED; + } else if (!s->ext.ticket_expected) { + /* + * If we're not going to renew the ticket then we just finish the + * handshake at this point. + */ + st->hand_state = TLS_ST_OK; + return WRITE_TRAN_CONTINUE; + } + if (s->num_tickets > s->sent_tickets) + st->hand_state = TLS_ST_SW_SESSION_TICKET; + else + st->hand_state = TLS_ST_OK; return WRITE_TRAN_CONTINUE; case TLS_ST_SR_KEY_UPDATE: @@ -472,9 +509,18 @@ static WRITE_TRAN ossl_statem_server13_write_transition(SSL *s) /* Fall through */ case TLS_ST_SW_KEY_UPDATE: - case TLS_ST_SW_SESSION_TICKET: st->hand_state = TLS_ST_OK; - ossl_statem_set_in_init(s, 0); + return WRITE_TRAN_CONTINUE; + + case TLS_ST_SW_SESSION_TICKET: + /* In a resumption we only ever send a maximum of one new ticket. + * Following an initial handshake we send the number of tickets we have + * been configured for. + */ + if (s->hit || s->num_tickets <= s->sent_tickets) { + /* We've written enough tickets out. */ + st->hand_state = TLS_ST_OK; + } return WRITE_TRAN_CONTINUE; } } @@ -498,6 +544,9 @@ WRITE_TRAN ossl_statem_server_write_transition(SSL *s) switch (st->hand_state) { default: /* Shouldn't happen */ + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_OSSL_STATEM_SERVER_WRITE_TRANSITION, + ERR_R_INTERNAL_ERROR); return WRITE_TRAN_ERROR; case TLS_ST_OK: @@ -509,7 +558,7 @@ WRITE_TRAN ossl_statem_server_write_transition(SSL *s) } /* Must be an incoming ClientHello */ if (!tls_setup_handshake(s)) { - ossl_statem_set_error(s); + /* SSLfatal() already called */ return WRITE_TRAN_ERROR; } /* Fall through */ @@ -520,15 +569,19 @@ WRITE_TRAN ossl_statem_server_write_transition(SSL *s) case TLS_ST_SW_HELLO_REQ: st->hand_state = TLS_ST_OK; - ossl_statem_set_in_init(s, 0); return WRITE_TRAN_CONTINUE; case TLS_ST_SR_CLNT_HELLO: if (SSL_IS_DTLS(s) && !s->d1->cookie_verified - && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)) + && (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE)) { st->hand_state = DTLS_ST_SW_HELLO_VERIFY_REQUEST; - else + } else if (s->renegotiate == 0 && !SSL_IS_FIRST_HANDSHAKE(s)) { + /* We must have rejected the renegotiation */ + st->hand_state = TLS_ST_OK; + return WRITE_TRAN_CONTINUE; + } else { st->hand_state = TLS_ST_SW_SRVR_HELLO; + } return WRITE_TRAN_CONTINUE; case DTLS_ST_SW_HELLO_VERIFY_REQUEST: @@ -587,7 +640,6 @@ WRITE_TRAN ossl_statem_server_write_transition(SSL *s) case TLS_ST_SR_FINISHED: if (s->hit) { st->hand_state = TLS_ST_OK; - ossl_statem_set_in_init(s, 0); return WRITE_TRAN_CONTINUE; } else if (s->ext.ticket_expected) { st->hand_state = TLS_ST_SW_SESSION_TICKET; @@ -609,7 +661,6 @@ WRITE_TRAN ossl_statem_server_write_transition(SSL *s) return WRITE_TRAN_FINISHED; } st->hand_state = TLS_ST_OK; - ossl_statem_set_in_init(s, 0); return WRITE_TRAN_CONTINUE; } } @@ -645,7 +696,7 @@ WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst) case TLS_ST_SW_SRVR_HELLO: if (SSL_IS_DTLS(s)) { /* - * Messages we write from now on should be bufferred and + * Messages we write from now on should be buffered and * retransmitted if necessary, so we need to use the timer now */ st->use_timer = 1; @@ -654,19 +705,23 @@ WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst) case TLS_ST_SW_SRVR_DONE: #ifndef OPENSSL_NO_SCTP - if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))) + if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))) { + /* Calls SSLfatal() as required */ return dtls_wait_for_dry(s); + } #endif return WORK_FINISHED_CONTINUE; case TLS_ST_SW_SESSION_TICKET: - if (SSL_IS_TLS13(s)) { + if (SSL_IS_TLS13(s) && s->sent_tickets == 0) { /* * Actually this is the end of the handshake, but we're going * straight into writing the session ticket out. So we finish off * the handshake, but keep the various buffers active. + * + * Calls SSLfatal as required. */ - return tls_finish_handshake(s, wst, 0); + return tls_finish_handshake(s, wst, 0, 0); } if (SSL_IS_DTLS(s)) { /* * We're into the last flight. We don't retransmit the last flight @@ -677,9 +732,11 @@ WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst) break; case TLS_ST_SW_CHANGE: + if (SSL_IS_TLS13(s)) + break; s->session->cipher = s->s3->tmp.new_cipher; if (!s->method->ssl3_enc->setup_key_block(s)) { - ossl_statem_set_error(s); + /* SSLfatal() already called */ return WORK_ERROR; } if (SSL_IS_DTLS(s)) { @@ -693,8 +750,15 @@ WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst) } return WORK_FINISHED_CONTINUE; + case TLS_ST_EARLY_DATA: + if (s->early_data_state != SSL_EARLY_DATA_ACCEPTING + && (s->s3->flags & TLS1_FLAGS_STATELESS) == 0) + return WORK_FINISHED_CONTINUE; + /* Fall through */ + case TLS_ST_OK: - return tls_finish_handshake(s, wst, 1); + /* Calls SSLfatal() as required */ + return tls_finish_handshake(s, wst, 1, 1); } return WORK_FINISHED_CONTINUE; @@ -715,16 +779,11 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) /* No post work to be done */ break; - case TLS_ST_SW_HELLO_RETRY_REQUEST: - if (statem_flush(s) != 1) - return WORK_MORE_A; - break; - case TLS_ST_SW_HELLO_REQ: if (statem_flush(s) != 1) return WORK_MORE_A; if (!ssl3_init_finished_mac(s)) { - ossl_statem_set_error(s); + /* SSLfatal() already called */ return WORK_ERROR; } break; @@ -734,7 +793,7 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) return WORK_MORE_A; /* HelloVerifyRequest resets Finished MAC */ if (s->version != DTLS1_BAD_VER && !ssl3_init_finished_mac(s)) { - ossl_statem_set_error(s); + /* SSLfatal() already called */ return WORK_ERROR; } /* @@ -745,6 +804,12 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) break; case TLS_ST_SW_SRVR_HELLO: + if (SSL_IS_TLS13(s) && s->hello_retry_request == SSL_HRR_PENDING) { + if ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) == 0 + && statem_flush(s) != 1) + return WORK_MORE_A; + break; + } #ifndef OPENSSL_NO_SCTP if (SSL_IS_DTLS(s) && s->hit) { unsigned char sctpauthkey[64]; @@ -761,7 +826,9 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) sizeof(sctpauthkey), labelbuffer, sizeof(labelbuffer), NULL, 0, 0) <= 0) { - ossl_statem_set_error(s); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_OSSL_STATEM_SERVER_POST_WORK, + ERR_R_INTERNAL_ERROR); return WORK_ERROR; } @@ -769,6 +836,18 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) sizeof(sctpauthkey), sctpauthkey); } #endif + if (!SSL_IS_TLS13(s) + || ((s->options & SSL_OP_ENABLE_MIDDLEBOX_COMPAT) != 0 + && s->hello_retry_request != SSL_HRR_COMPLETE)) + break; + /* Fall through */ + + case TLS_ST_SW_CHANGE: + if (s->hello_retry_request == SSL_HRR_PENDING) { + if (!statem_flush(s)) + return WORK_MORE_A; + break; + } /* * TODO(TLS1.3): This actually causes a problem. We don't yet know * whether the next record we are going to receive is an unencrypted @@ -778,14 +857,20 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) if (SSL_IS_TLS13(s)) { if (!s->method->ssl3_enc->setup_key_block(s) || !s->method->ssl3_enc->change_cipher_state(s, - SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_SERVER_WRITE) - || !s->method->ssl3_enc->change_cipher_state(s, - SSL3_CC_HANDSHAKE |SSL3_CHANGE_CIPHER_SERVER_READ)) - return WORK_ERROR; + SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_SERVER_WRITE)) { + /* SSLfatal() already called */ + return WORK_ERROR; + } + + if (s->ext.early_data != SSL_EARLY_DATA_ACCEPTED + && !s->method->ssl3_enc->change_cipher_state(s, + SSL3_CC_HANDSHAKE |SSL3_CHANGE_CIPHER_SERVER_READ)) { + /* SSLfatal() already called */ + return WORK_ERROR; + } + break; } - break; - case TLS_ST_SW_CHANGE: #ifndef OPENSSL_NO_SCTP if (SSL_IS_DTLS(s) && !s->hit) { /* @@ -799,7 +884,7 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) if (!s->method->ssl3_enc->change_cipher_state(s, SSL3_CHANGE_CIPHER_SERVER_WRITE)) { - ossl_statem_set_error(s); + /* SSLfatal() already called */ return WORK_ERROR; } @@ -831,15 +916,25 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) &s->session->master_key_length) || !s->method->ssl3_enc->change_cipher_state(s, SSL3_CC_APPLICATION | SSL3_CHANGE_CIPHER_SERVER_WRITE)) + /* SSLfatal() already called */ return WORK_ERROR; } break; + case TLS_ST_SW_CERT_REQ: + if (s->post_handshake_auth == SSL_PHA_REQUEST_PENDING) { + if (statem_flush(s) != 1) + return WORK_MORE_A; + } + break; + case TLS_ST_SW_KEY_UPDATE: if (statem_flush(s) != 1) return WORK_MORE_A; - if (!tls13_update_key(s, 1)) + if (!tls13_update_key(s, 1)) { + /* SSLfatal() already called */ return WORK_ERROR; + } break; case TLS_ST_SW_SESSION_TICKET: @@ -867,6 +962,9 @@ int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt, switch (st->hand_state) { default: /* Shouldn't happen */ + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_OSSL_STATEM_SERVER_CONSTRUCT_MESSAGE, + SSL_R_BAD_HANDSHAKE_STATE); return 0; case TLS_ST_SW_CHANGE: @@ -934,16 +1032,16 @@ int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt, *mt = SSL3_MT_FINISHED; break; + case TLS_ST_EARLY_DATA: + *confunc = NULL; + *mt = SSL3_MT_DUMMY; + break; + case TLS_ST_SW_ENCRYPTED_EXTENSIONS: *confunc = tls_construct_encrypted_extensions; *mt = SSL3_MT_ENCRYPTED_EXTENSIONS; break; - case TLS_ST_SW_HELLO_RETRY_REQUEST: - *confunc = tls_construct_hello_retry_request; - *mt = SSL3_MT_HELLO_RETRY_REQUEST; - break; - case TLS_ST_SW_KEY_UPDATE: *confunc = tls_construct_key_update; *mt = SSL3_MT_KEY_UPDATE; @@ -989,6 +1087,9 @@ size_t ossl_statem_server_max_message_size(SSL *s) case TLS_ST_SR_CLNT_HELLO: return CLIENT_HELLO_MAX_LENGTH; + case TLS_ST_SR_END_OF_EARLY_DATA: + return END_OF_EARLY_DATA_MAX_LENGTH; + case TLS_ST_SR_CERT: return s->max_cert_list; @@ -1024,11 +1125,17 @@ MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt) switch (st->hand_state) { default: /* Shouldn't happen */ + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_OSSL_STATEM_SERVER_PROCESS_MESSAGE, + ERR_R_INTERNAL_ERROR); return MSG_PROCESS_ERROR; case TLS_ST_SR_CLNT_HELLO: return tls_process_client_hello(s, pkt); + case TLS_ST_SR_END_OF_EARLY_DATA: + return tls_process_end_of_early_data(s, pkt); + case TLS_ST_SR_CERT: return tls_process_client_certificate(s, pkt); @@ -1066,6 +1173,9 @@ WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst) switch (st->hand_state) { default: /* Shouldn't happen */ + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_OSSL_STATEM_SERVER_POST_PROCESS_MESSAGE, + ERR_R_INTERNAL_ERROR); return WORK_ERROR; case TLS_ST_SR_CLNT_HELLO: @@ -1073,34 +1183,15 @@ WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst) case TLS_ST_SR_KEY_EXCH: return tls_post_process_client_key_exchange(s, wst); - - case TLS_ST_SR_CERT_VRFY: -#ifndef OPENSSL_NO_SCTP - if ( /* Is this SCTP? */ - BIO_dgram_is_sctp(SSL_get_wbio(s)) - /* Are we renegotiating? */ - && s->renegotiate && 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)); - ossl_statem_set_sctp_read_sock(s, 1); - return WORK_MORE_A; - } else { - ossl_statem_set_sctp_read_sock(s, 0); - } -#endif - return WORK_FINISHED_CONTINUE; } - return WORK_FINISHED_CONTINUE; } #ifndef OPENSSL_NO_SRP -static int ssl_check_srp_ext_ClientHello(SSL *s, int *al) +/* Returns 1 on success, 0 for retryable error, -1 for fatal error */ +static int ssl_check_srp_ext_ClientHello(SSL *s) { - int ret = SSL_ERROR_NONE; - - *al = SSL_AD_UNRECOGNIZED_NAME; + int ret; + int al = SSL_AD_UNRECOGNIZED_NAME; if ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) && (s->srp_ctx.TLS_ext_srp_username_callback != NULL)) { @@ -1109,13 +1200,24 @@ static int ssl_check_srp_ext_ClientHello(SSL *s, int *al) * RFC 5054 says SHOULD reject, we do so if There is no srp * login name */ - ret = SSL3_AL_FATAL; - *al = SSL_AD_UNKNOWN_PSK_IDENTITY; + SSLfatal(s, SSL_AD_UNKNOWN_PSK_IDENTITY, + SSL_F_SSL_CHECK_SRP_EXT_CLIENTHELLO, + SSL_R_PSK_IDENTITY_NOT_FOUND); + return -1; } else { - ret = SSL_srp_server_param_with_username(s, al); + ret = SSL_srp_server_param_with_username(s, &al); + if (ret < 0) + return 0; + if (ret == SSL3_AL_FATAL) { + SSLfatal(s, al, SSL_F_SSL_CHECK_SRP_EXT_CLIENTHELLO, + al == SSL_AD_UNKNOWN_PSK_IDENTITY + ? SSL_R_PSK_IDENTITY_NOT_FOUND + : SSL_R_CLIENTHELLO_TLSEXT); + return -1; + } } } - return ret; + return 1; } #endif @@ -1137,15 +1239,16 @@ int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt) s->ctx->app_gen_cookie_cb(s, s->d1->cookie, &cookie_leni) == 0 || cookie_leni > 255) { - SSLerr(SSL_F_DTLS_CONSTRUCT_HELLO_VERIFY_REQUEST, - SSL_R_COOKIE_GEN_CALLBACK_FAILURE); + SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_DTLS_CONSTRUCT_HELLO_VERIFY_REQUEST, + SSL_R_COOKIE_GEN_CALLBACK_FAILURE); return 0; } s->d1->cookie_len = cookie_leni; if (!dtls_raw_hello_verify_request(pkt, s->d1->cookie, s->d1->cookie_len)) { - SSLerr(SSL_F_DTLS_CONSTRUCT_HELLO_VERIFY_REQUEST, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_NO_ALERT, SSL_F_DTLS_CONSTRUCT_HELLO_VERIFY_REQUEST, + ERR_R_INTERNAL_ERROR); return 0; } @@ -1160,6 +1263,7 @@ int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt) * SNI, * elliptic_curves * ec_point_formats + * signature_algorithms (for TLSv1.2 only) * * We wish to fingerprint Safari because they broke ECDHE-ECDSA support in 10.8, * but they advertise support. So enabling ECDHE-ECDSA ciphers breaks them. @@ -1217,25 +1321,35 @@ static void ssl_check_for_safari(SSL *s, const CLIENTHELLO_MSG *hello) MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) { - int al = SSL_AD_INTERNAL_ERROR; /* |cookie| will only be initialized for DTLS. */ PACKET session_id, compression, extensions, cookie; static const unsigned char null_compression = 0; - CLIENTHELLO_MSG *clienthello; + CLIENTHELLO_MSG *clienthello = NULL; - clienthello = OPENSSL_zalloc(sizeof(*clienthello)); - if (clienthello == NULL) { - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); - goto err; - } /* Check if this is actually an unexpected renegotiation ClientHello */ if (s->renegotiate == 0 && !SSL_IS_FIRST_HANDSHAKE(s)) { + if (!ossl_assert(!SSL_IS_TLS13(s))) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + ERR_R_INTERNAL_ERROR); + goto err; + } + if ((s->options & SSL_OP_NO_RENEGOTIATION) != 0 + || (!s->s3->send_connection_binding + && (s->options + & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION) == 0)) { + ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); + return MSG_PROCESS_FINISHED_READING; + } s->renegotiate = 1; s->new_session = 1; } - /* This is a real handshake so make sure we clean it up at the end */ - s->statem.cleanuphand = 1; + clienthello = OPENSSL_zalloc(sizeof(*clienthello)); + if (clienthello == NULL) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + ERR_R_INTERNAL_ERROR); + goto err; + } /* * First, parse the raw ClientHello data into the CLIENTHELLO_MSG structure. @@ -1246,10 +1360,11 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) if (clienthello->isv2) { unsigned int mt; - if (!SSL_IS_FIRST_HANDSHAKE(s) || s->hello_retry_request) { - al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNEXPECTED_MESSAGE); - goto f_err; + if (!SSL_IS_FIRST_HANDSHAKE(s) + || s->hello_retry_request != SSL_HRR_NONE) { + SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, + SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_UNEXPECTED_MESSAGE); + goto err; } /*- @@ -1274,14 +1389,15 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) * layer in order to have determined that this is a SSLv2 record * in the first place */ - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + ERR_R_INTERNAL_ERROR); goto err; } } if (!PACKET_get_net_2(pkt, &clienthello->legacy_version)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_TOO_SHORT); + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + SSL_R_LENGTH_TOO_SHORT); goto err; } @@ -1298,16 +1414,15 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) if (!PACKET_get_net_2(pkt, &ciphersuite_len) || !PACKET_get_net_2(pkt, &session_id_len) || !PACKET_get_net_2(pkt, &challenge_len)) { - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, - SSL_R_RECORD_LENGTH_MISMATCH); - al = SSL_AD_DECODE_ERROR; - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + SSL_R_RECORD_LENGTH_MISMATCH); + goto err; } if (session_id_len > SSL_MAX_SSL_SESSION_ID_LENGTH) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); - goto f_err; + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, + SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); + goto err; } if (!PACKET_get_sub_packet(pkt, &clienthello->ciphersuites, @@ -1316,10 +1431,9 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) || !PACKET_get_sub_packet(pkt, &challenge, challenge_len) /* No extensions. */ || PACKET_remaining(pkt) != 0) { - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, - SSL_R_RECORD_LENGTH_MISMATCH); - al = SSL_AD_DECODE_ERROR; - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + SSL_R_RECORD_LENGTH_MISMATCH); + goto err; } clienthello->session_id_len = session_id_len; @@ -1336,9 +1450,9 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) challenge_len, challenge_len) /* Advertise only null compression. */ || !PACKET_buf_init(&compression, &null_compression, 1)) { - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); - al = SSL_AD_INTERNAL_ERROR; - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + ERR_R_INTERNAL_ERROR); + goto err; } PACKET_null_init(&clienthello->extensions); @@ -1349,23 +1463,23 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) || !PACKET_copy_all(&session_id, clienthello->session_id, SSL_MAX_SSL_SESSION_ID_LENGTH, &clienthello->session_id_len)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + SSL_R_LENGTH_MISMATCH); + goto err; } if (SSL_IS_DTLS(s)) { if (!PACKET_get_length_prefixed_1(pkt, &cookie)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + SSL_R_LENGTH_MISMATCH); + goto err; } if (!PACKET_copy_all(&cookie, clienthello->dtls_cookie, DTLS1_COOKIE_LENGTH, &clienthello->dtls_cookie_len)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + goto err; } /* * If we require cookies and this ClientHello doesn't contain one, @@ -1374,30 +1488,31 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) */ if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) { if (clienthello->dtls_cookie_len == 0) - return 1; + return MSG_PROCESS_FINISHED_READING; } } if (!PACKET_get_length_prefixed_2(pkt, &clienthello->ciphersuites)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + SSL_R_LENGTH_MISMATCH); + goto err; } if (!PACKET_get_length_prefixed_1(pkt, &compression)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + SSL_R_LENGTH_MISMATCH); + goto err; } /* Could be empty. */ if (PACKET_remaining(pkt) == 0) { PACKET_null_init(&clienthello->extensions); } else { - if (!PACKET_get_length_prefixed_2(pkt, &clienthello->extensions)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); - goto f_err; + if (!PACKET_get_length_prefixed_2(pkt, &clienthello->extensions) + || PACKET_remaining(pkt) != 0) { + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + SSL_R_LENGTH_MISMATCH); + goto err; } } } @@ -1405,37 +1520,35 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) if (!PACKET_copy_all(&compression, clienthello->compressions, MAX_COMPRESSIONS_SIZE, &clienthello->compressions_len)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, SSL_R_LENGTH_MISMATCH); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_HELLO, + ERR_R_INTERNAL_ERROR); + goto err; } /* Preserve the raw extensions PACKET for later use */ extensions = clienthello->extensions; - if (!tls_collect_extensions(s, &extensions, EXT_CLIENT_HELLO, - &clienthello->pre_proc_exts, &al, - &clienthello->pre_proc_exts_len)) { - /* SSLerr already been called */ - goto f_err; + if (!tls_collect_extensions(s, &extensions, SSL_EXT_CLIENT_HELLO, + &clienthello->pre_proc_exts, + &clienthello->pre_proc_exts_len, 1)) { + /* SSLfatal already been called */ + goto err; } s->clienthello = clienthello; return MSG_PROCESS_CONTINUE_PROCESSING; - f_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - err: - ossl_statem_set_error(s); - OPENSSL_free(clienthello->pre_proc_exts); + err: + if (clienthello != NULL) + OPENSSL_free(clienthello->pre_proc_exts); OPENSSL_free(clienthello); return MSG_PROCESS_ERROR; } -static int tls_early_post_process_client_hello(SSL *s, int *al) +static int tls_early_post_process_client_hello(SSL *s) { unsigned int j; - int i; + int i, al = SSL_AD_INTERNAL_ERROR; int protverr; size_t loop; unsigned long id; @@ -1446,19 +1559,24 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) STACK_OF(SSL_CIPHER) *ciphers = NULL; STACK_OF(SSL_CIPHER) *scsvs = NULL; CLIENTHELLO_MSG *clienthello = s->clienthello; + DOWNGRADE dgrd = DOWNGRADE_NONE; - *al = SSL_AD_INTERNAL_ERROR; /* Finished parsing the ClientHello, now we can start processing it */ - /* Give the early callback a crack at things */ - if (s->ctx->early_cb != NULL) { - int code; - /* A failure in the early callback terminates the connection. */ - code = s->ctx->early_cb(s, al, s->ctx->early_cb_arg); - if (code == 0) + /* Give the ClientHello callback a crack at things */ + if (s->ctx->client_hello_cb != NULL) { + /* A failure in the ClientHello callback terminates the connection. */ + switch (s->ctx->client_hello_cb(s, &al, s->ctx->client_hello_cb_arg)) { + case SSL_CLIENT_HELLO_SUCCESS: + break; + case SSL_CLIENT_HELLO_RETRY: + s->rwstate = SSL_CLIENT_HELLO_CB; + return -1; + case SSL_CLIENT_HELLO_ERROR: + default: + SSLfatal(s, al, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_CALLBACK_FAILED); goto err; - if (code < 0) { - s->rwstate = SSL_EARLY_WORK; - return code; } } @@ -1472,10 +1590,12 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) || (clienthello->legacy_version & 0xff00) != (SSL3_VERSION_MAJOR << 8)) { /* - * This is real SSLv2 or something complete unknown. We don't + * This is real SSLv2 or something completely unknown. We don't * support it. */ - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_UNKNOWN_PROTOCOL); + SSLfatal(s, SSL_AD_PROTOCOL_VERSION, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_UNKNOWN_PROTOCOL); goto err; } /* SSLv3/TLS */ @@ -1486,7 +1606,7 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) * versions are potentially compatible. Version negotiation comes later. */ if (!SSL_IS_DTLS(s)) { - protverr = ssl_choose_server_version(s, clienthello); + protverr = ssl_choose_server_version(s, clienthello, &dgrd); } else if (s->method->version != DTLS_ANY_VERSION && DTLS_VERSION_LT((int)clienthello->legacy_version, s->version)) { protverr = SSL_R_VERSION_TOO_LOW; @@ -1495,12 +1615,20 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) } if (protverr) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, protverr); if (SSL_IS_FIRST_HANDSHAKE(s)) { /* like ssl3_get_record, send alert using remote version number */ s->version = s->client_version = clienthello->legacy_version; } - *al = SSL_AD_PROTOCOL_VERSION; + SSLfatal(s, SSL_AD_PROTOCOL_VERSION, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, protverr); + goto err; + } + + /* TLSv1.3 specifies that a ClientHello must end on a record boundary */ + if (SSL_IS_TLS13(s) && RECORD_LAYER_processed_read_pending(&s->rlayer)) { + SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_NOT_ON_RECORD_BOUNDARY); goto err; } @@ -1510,9 +1638,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) if (s->ctx->app_verify_cookie_cb != NULL) { if (s->ctx->app_verify_cookie_cb(s, clienthello->dtls_cookie, clienthello->dtls_cookie_len) == 0) { - *al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_COOKIE_MISMATCH); + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_COOKIE_MISMATCH); goto err; /* else cookie verification succeeded */ } @@ -1520,18 +1648,19 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) } else if (s->d1->cookie_len != clienthello->dtls_cookie_len || memcmp(clienthello->dtls_cookie, s->d1->cookie, s->d1->cookie_len) != 0) { - *al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_COOKIE_MISMATCH); goto err; } s->d1->cookie_verified = 1; } if (s->method->version == DTLS_ANY_VERSION) { - protverr = ssl_choose_server_version(s, clienthello); + protverr = ssl_choose_server_version(s, clienthello, &dgrd); if (protverr != 0) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, protverr); s->version = s->client_version; - *al = SSL_AD_PROTOCOL_VERSION; + SSLfatal(s, SSL_AD_PROTOCOL_VERSION, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, protverr); goto err; } } @@ -1539,11 +1668,76 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) s->hit = 0; + if (!ssl_cache_cipherlist(s, &clienthello->ciphersuites, + clienthello->isv2) || + !bytes_to_cipher_list(s, &clienthello->ciphersuites, &ciphers, &scsvs, + clienthello->isv2, 1)) { + /* SSLfatal() already called */ + goto err; + } + + s->s3->send_connection_binding = 0; + /* Check what signalling cipher-suite values were received. */ + if (scsvs != NULL) { + for(i = 0; i < sk_SSL_CIPHER_num(scsvs); i++) { + c = sk_SSL_CIPHER_value(scsvs, i); + if (SSL_CIPHER_get_id(c) == SSL3_CK_SCSV) { + if (s->renegotiate) { + /* SCSV is fatal if renegotiating */ + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); + goto err; + } + s->s3->send_connection_binding = 1; + } else if (SSL_CIPHER_get_id(c) == SSL3_CK_FALLBACK_SCSV && + !ssl_check_version_downgrade(s)) { + /* + * This SCSV indicates that the client previously tried + * a higher version. We should fail if the current version + * is an unexpected downgrade, as that indicates that the first + * connection may have been tampered with in order to trigger + * an insecure downgrade. + */ + SSLfatal(s, SSL_AD_INAPPROPRIATE_FALLBACK, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_INAPPROPRIATE_FALLBACK); + goto err; + } + } + } + + /* For TLSv1.3 we must select the ciphersuite *before* session resumption */ + if (SSL_IS_TLS13(s)) { + const SSL_CIPHER *cipher = + ssl3_choose_cipher(s, ciphers, SSL_get_ciphers(s)); + + if (cipher == NULL) { + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_NO_SHARED_CIPHER); + goto err; + } + if (s->hello_retry_request == SSL_HRR_PENDING + && (s->s3->tmp.new_cipher == NULL + || s->s3->tmp.new_cipher->id != cipher->id)) { + /* + * A previous HRR picked a different ciphersuite to the one we + * just selected. Something must have changed. + */ + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_BAD_CIPHER); + goto err; + } + s->s3->tmp.new_cipher = cipher; + } + /* We need to do this before getting the session */ if (!tls_parse_extension(s, TLSEXT_IDX_extended_master_secret, - EXT_CLIENT_HELLO, - clienthello->pre_proc_exts, NULL, 0, al)) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); + SSL_EXT_CLIENT_HELLO, + clienthello->pre_proc_exts, NULL, 0)) { + /* SSLfatal() already called */ goto err; } @@ -1566,62 +1760,38 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) if (clienthello->isv2 || (s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) { - if (!ssl_get_new_session(s, 1)) + if (!ssl_get_new_session(s, 1)) { + /* SSLfatal() already called */ goto err; + } } else { - i = ssl_get_prev_session(s, clienthello, al); + i = ssl_get_prev_session(s, clienthello); if (i == 1) { /* previous session */ s->hit = 1; } else if (i == -1) { + /* SSLfatal() already called */ goto err; } else { /* i == 0 */ - if (!ssl_get_new_session(s, 1)) + if (!ssl_get_new_session(s, 1)) { + /* SSLfatal() already called */ goto err; + } } } - if (!ssl_cache_cipherlist(s, &clienthello->ciphersuites, - clienthello->isv2, al) || - !bytes_to_cipher_list(s, &clienthello->ciphersuites, &ciphers, &scsvs, - clienthello->isv2, al)) { - goto err; - } - - s->s3->send_connection_binding = 0; - /* Check what signalling cipher-suite values were received. */ - if (scsvs != NULL) { - for(i = 0; i < sk_SSL_CIPHER_num(scsvs); i++) { - c = sk_SSL_CIPHER_value(scsvs, i); - if (SSL_CIPHER_get_id(c) == SSL3_CK_SCSV) { - if (s->renegotiate) { - /* SCSV is fatal if renegotiating */ - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); - *al = SSL_AD_HANDSHAKE_FAILURE; - goto err; - } - s->s3->send_connection_binding = 1; - } else if (SSL_CIPHER_get_id(c) == SSL3_CK_FALLBACK_SCSV && - !ssl_check_version_downgrade(s)) { - /* - * This SCSV indicates that the client previously tried - * a higher version. We should fail if the current version - * is an unexpected downgrade, as that indicates that the first - * connection may have been tampered with in order to trigger - * an insecure downgrade. - */ - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_INAPPROPRIATE_FALLBACK); - *al = SSL_AD_INAPPROPRIATE_FALLBACK; - goto err; - } - } + if (SSL_IS_TLS13(s)) { + memcpy(s->tmp_session_id, s->clienthello->session_id, + s->clienthello->session_id_len); + s->tmp_session_id_len = s->clienthello->session_id_len; } - /* If it is a hit, check that the cipher is in the list */ - if (s->hit) { + /* + * If it is a hit, check that the cipher is in the list. In TLSv1.3 we check + * ciphersuite compatibility with the session as part of resumption. + */ + if (!SSL_IS_TLS13(s) && s->hit) { j = 0; id = s->session->cipher->id; @@ -1644,9 +1814,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) * we need to have the cipher in the cipher list if we are asked * to reuse it */ - *al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_REQUIRED_CIPHER_MISSING); + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_REQUIRED_CIPHER_MISSING); goto err; } } @@ -1658,8 +1828,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) if (loop >= clienthello->compressions_len) { /* no compress */ - *al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_NO_COMPRESSION_SPECIFIED); + SSLfatal(s, SSL_AD_DECODE_ERROR, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_NO_COMPRESSION_SPECIFIED); goto err; } @@ -1669,9 +1840,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) #endif /* !OPENSSL_NO_EC */ /* TLS extensions */ - if (!tls_parse_all_extensions(s, EXT_CLIENT_HELLO, - clienthello->pre_proc_exts, NULL, 0, al)) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_PARSE_TLSEXT); + if (!tls_parse_all_extensions(s, SSL_EXT_CLIENT_HELLO, + clienthello->pre_proc_exts, NULL, 0, 1)) { + /* SSLfatal() already called */ goto err; } @@ -1684,12 +1855,19 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) { unsigned char *pos; pos = s->s3->server_random; - if (ssl_fill_hello_random(s, 1, pos, SSL3_RANDOM_SIZE) <= 0) { + if (ssl_fill_hello_random(s, 1, pos, SSL3_RANDOM_SIZE, dgrd) <= 0) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + ERR_R_INTERNAL_ERROR); goto err; } } - if (!s->hit && s->version >= TLS1_VERSION && s->ext.session_secret_cb) { + if (!s->hit + && s->version >= TLS1_VERSION + && !SSL_IS_TLS13(s) + && !SSL_IS_DTLS(s) + && s->ext.session_secret_cb) { const SSL_CIPHER *pref_cipher = NULL; /* * s->session->master_key_length is a size_t, but this is an int for @@ -1715,8 +1893,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) pref_cipher = ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s)); if (pref_cipher == NULL) { - *al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_NO_SHARED_CIPHER); + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_NO_SHARED_CIPHER); goto err; } @@ -1734,16 +1913,30 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) * algorithms from the client, starting at q. */ s->s3->tmp.new_compression = NULL; + if (SSL_IS_TLS13(s)) { + /* + * We already checked above that the NULL compression method appears in + * the list. Now we check there aren't any others (which is illegal in + * a TLSv1.3 ClientHello. + */ + if (clienthello->compressions_len != 1) { + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_INVALID_COMPRESSION_ALGORITHM); + goto err; + } + } #ifndef OPENSSL_NO_COMP /* This only happens if we have a cache hit */ - if (s->session->compress_meth != 0) { + else if (s->session->compress_meth != 0) { int m, comp_id = s->session->compress_meth; unsigned int k; /* Perform sanity checks on resumed compression algorithm */ /* Can't disable compression */ if (!ssl_allow_compression(s)) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_INCONSISTENT_COMPRESSION); + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_INCONSISTENT_COMPRESSION); goto err; } /* Look for resumed compression method */ @@ -1755,8 +1948,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) } } if (s->s3->tmp.new_compression == NULL) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_INVALID_COMPRESSION_ALGORITHM); + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_INVALID_COMPRESSION_ALGORITHM); goto err; } /* Look for resumed method in compression list */ @@ -1765,14 +1959,14 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) break; } if (k >= clienthello->compressions_len) { - *al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_REQUIRED_COMPRESSION_ALGORITHM_MISSING); + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_REQUIRED_COMPRESSION_ALGORITHM_MISSING); goto err; } - } else if (s->hit) + } else if (s->hit) { comp = NULL; - else if (ssl_allow_compression(s) && s->ctx->comp_methods) { + } else if (ssl_allow_compression(s) && s->ctx->comp_methods) { /* See if we have a match */ int m, nn, v, done = 0; unsigned int o; @@ -1801,7 +1995,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) * using compression. */ if (s->session->compress_meth != 0) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_INCONSISTENT_COMPRESSION); + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_INCONSISTENT_COMPRESSION); goto err; } #endif @@ -1810,35 +2006,37 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) * Given s->session->ciphers and SSL_get_ciphers, we must pick a cipher */ - if (!s->hit) { -#ifdef OPENSSL_NO_COMP - s->session->compress_meth = 0; -#else - s->session->compress_meth = (comp == NULL) ? 0 : comp->id; -#endif + if (!s->hit || SSL_IS_TLS13(s)) { sk_SSL_CIPHER_free(s->session->ciphers); s->session->ciphers = ciphers; if (ciphers == NULL) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + ERR_R_INTERNAL_ERROR); goto err; } ciphers = NULL; - if (!tls1_set_server_sigalgs(s)) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); - goto err; - } } - sk_SSL_CIPHER_free(ciphers); + if (!s->hit) { +#ifdef OPENSSL_NO_COMP + s->session->compress_meth = 0; +#else + s->session->compress_meth = (comp == NULL) ? 0 : comp->id; +#endif + if (!tls1_set_server_sigalgs(s)) { + /* SSLfatal() already called */ + goto err; + } + } + + sk_SSL_CIPHER_free(ciphers); sk_SSL_CIPHER_free(scsvs); OPENSSL_free(clienthello->pre_proc_exts); OPENSSL_free(s->clienthello); s->clienthello = NULL; return 1; err: - ossl_statem_set_error(s); - sk_SSL_CIPHER_free(ciphers); sk_SSL_CIPHER_free(scsvs); OPENSSL_free(clienthello->pre_proc_exts); @@ -1850,9 +2048,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *al) /* * Call the status request callback if needed. Upon success, returns 1. - * Upon failure, returns 0 and sets |*al| to the appropriate fatal alert. + * Upon failure, returns 0. */ -static int tls_handle_status_request(SSL *s, int *al) +static int tls_handle_status_request(SSL *s) { s->ext.status_expected = 0; @@ -1887,10 +2085,94 @@ static int tls_handle_status_request(SSL *s, int *al) /* something bad happened */ case SSL_TLSEXT_ERR_ALERT_FATAL: default: - *al = SSL_AD_INTERNAL_ERROR; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_HANDLE_STATUS_REQUEST, + SSL_R_CLIENTHELLO_TLSEXT); + return 0; + } + } + } + + return 1; +} + +/* + * Call the alpn_select callback if needed. Upon success, returns 1. + * Upon failure, returns 0. + */ +int tls_handle_alpn(SSL *s) +{ + const unsigned char *selected = NULL; + unsigned char selected_len = 0; + + if (s->ctx->ext.alpn_select_cb != NULL && s->s3->alpn_proposed != NULL) { + int r = s->ctx->ext.alpn_select_cb(s, &selected, &selected_len, + s->s3->alpn_proposed, + (unsigned int)s->s3->alpn_proposed_len, + s->ctx->ext.alpn_select_cb_arg); + + if (r == SSL_TLSEXT_ERR_OK) { + OPENSSL_free(s->s3->alpn_selected); + s->s3->alpn_selected = OPENSSL_memdup(selected, selected_len); + if (s->s3->alpn_selected == NULL) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_HANDLE_ALPN, + ERR_R_INTERNAL_ERROR); return 0; } + s->s3->alpn_selected_len = selected_len; +#ifndef OPENSSL_NO_NEXTPROTONEG + /* ALPN takes precedence over NPN. */ + s->s3->npn_seen = 0; +#endif + + /* Check ALPN is consistent with session */ + if (s->session->ext.alpn_selected == NULL + || selected_len != s->session->ext.alpn_selected_len + || memcmp(selected, s->session->ext.alpn_selected, + selected_len) != 0) { + /* Not consistent so can't be used for early_data */ + s->ext.early_data_ok = 0; + + if (!s->hit) { + /* + * This is a new session and so alpn_selected should have + * been initialised to NULL. We should update it with the + * selected ALPN. + */ + if (!ossl_assert(s->session->ext.alpn_selected == NULL)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_HANDLE_ALPN, + ERR_R_INTERNAL_ERROR); + return 0; + } + s->session->ext.alpn_selected = OPENSSL_memdup(selected, + selected_len); + if (s->session->ext.alpn_selected == NULL) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_HANDLE_ALPN, + ERR_R_INTERNAL_ERROR); + return 0; + } + s->session->ext.alpn_selected_len = selected_len; + } + } + + return 1; + } else if (r != SSL_TLSEXT_ERR_NOACK) { + SSLfatal(s, SSL_AD_NO_APPLICATION_PROTOCOL, SSL_F_TLS_HANDLE_ALPN, + SSL_R_NO_APPLICATION_PROTOCOL); + return 0; } + /* + * If r == SSL_TLSEXT_ERR_NOACK then behave as if no callback was + * present. + */ + } + + /* Check ALPN is consistent with session */ + if (s->session->ext.alpn_selected != NULL) { + /* Not consistent so can't be used for early_data */ + s->ext.early_data_ok = 0; } return 1; @@ -1898,29 +2180,28 @@ static int tls_handle_status_request(SSL *s, int *al) WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst) { - int al = SSL_AD_HANDSHAKE_FAILURE; const SSL_CIPHER *cipher; if (wst == WORK_MORE_A) { - int rv = tls_early_post_process_client_hello(s, &al); + int rv = tls_early_post_process_client_hello(s); if (rv == 0) { - /* SSLErr() was already called */ - goto f_err; + /* SSLfatal() was already called */ + goto err; } if (rv < 0) return WORK_MORE_A; wst = WORK_MORE_B; } if (wst == WORK_MORE_B) { - if (!s->hit) { + if (!s->hit || SSL_IS_TLS13(s)) { /* Let cert callback update server certificates if required */ - if (s->cert->cert_cb) { + if (!s->hit && s->cert->cert_cb != NULL) { int rv = s->cert->cert_cb(s, s->cert->cert_cb_arg); if (rv == 0) { - al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, - SSL_R_CERT_CB_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, + SSL_R_CERT_CB_ERROR); + goto err; } if (rv < 0) { s->rwstate = SSL_X509_LOOKUP; @@ -1928,26 +2209,35 @@ WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst) } s->rwstate = SSL_NOTHING; } - cipher = - ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s)); - if (cipher == NULL) { - SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, - SSL_R_NO_SHARED_CIPHER); - goto f_err; + /* In TLSv1.3 we selected the ciphersuite before resumption */ + if (!SSL_IS_TLS13(s)) { + cipher = + ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s)); + + if (cipher == NULL) { + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, + SSL_R_NO_SHARED_CIPHER); + goto err; + } + s->s3->tmp.new_cipher = cipher; + } + if (!s->hit) { + if (!tls_choose_sigalg(s, 1)) { + /* SSLfatal already called */ + goto err; + } + /* check whether we should disable session resumption */ + if (s->not_resumable_session_cb != NULL) + s->session->not_resumable = + s->not_resumable_session_cb(s, + ((s->s3->tmp.new_cipher->algorithm_mkey + & (SSL_kDHE | SSL_kECDHE)) != 0)); + if (s->session->not_resumable) + /* do not send a session ticket */ + s->ext.ticket_expected = 0; } - s->s3->tmp.new_cipher = cipher; - if (!tls_choose_sigalg(s, &al)) - goto f_err; - /* check whether we should disable session resumption */ - if (s->not_resumable_session_cb != NULL) - s->session->not_resumable = - s->not_resumable_session_cb(s, ((cipher->algorithm_mkey - & (SSL_kDHE | SSL_kECDHE)) - != 0)); - if (s->session->not_resumable) - /* do not send a session ticket */ - s->ext.ticket_expected = 0; } else { /* Session-id reuse */ s->s3->tmp.new_cipher = s->session->cipher; @@ -1969,10 +2259,19 @@ WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst) * Call status_request callback if needed. Has to be done after the * certificate callbacks etc above. */ - if (!tls_handle_status_request(s, &al)) { - SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, - SSL_R_CLIENTHELLO_TLSEXT); - goto f_err; + if (!tls_handle_status_request(s)) { + /* SSLfatal() already called */ + goto err; + } + /* + * Call alpn_select callback if needed. Has to be done after SNI and + * cipher negotiation (HTTP/2 restricts permitted ciphers). In TLSv1.3 + * we already did this because cipher negotiation happens earlier, and + * we must handle ALPN before we decide whether to accept early_data. + */ + if (!SSL_IS_TLS13(s) && !tls_handle_alpn(s)) { + /* SSLfatal() already called */ + goto err; } wst = WORK_MORE_C; @@ -1980,52 +2279,46 @@ WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst) #ifndef OPENSSL_NO_SRP if (wst == WORK_MORE_C) { int ret; - if ((ret = ssl_check_srp_ext_ClientHello(s, &al)) < 0) { + if ((ret = ssl_check_srp_ext_ClientHello(s)) == 0) { /* * callback indicates further work to be done */ s->rwstate = SSL_X509_LOOKUP; return WORK_MORE_C; } - if (ret != SSL_ERROR_NONE) { - /* - * This is not really an error but the only means to for - * a client to detect whether srp is supported. - */ - if (al != TLS1_AD_UNKNOWN_PSK_IDENTITY) - SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, - SSL_R_CLIENTHELLO_TLSEXT); - else - SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, - SSL_R_PSK_IDENTITY_NOT_FOUND); - goto f_err; + if (ret < 0) { + /* SSLfatal() already called */ + goto err; } } #endif return WORK_FINISHED_STOP; - f_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - ossl_statem_set_error(s); + err: return WORK_ERROR; } int tls_construct_server_hello(SSL *s, WPACKET *pkt) { - int compm, al = SSL_AD_INTERNAL_ERROR; + int compm; size_t sl, len; int version; + unsigned char *session_id; + int usetls13 = SSL_IS_TLS13(s) || s->hello_retry_request == SSL_HRR_PENDING; - /* TODO(TLS1.3): Remove the DRAFT conditional before release */ - version = SSL_IS_TLS13(s) ? TLS1_3_VERSION_DRAFT : s->version; + version = usetls13 ? TLS1_2_VERSION : s->version; if (!WPACKET_put_bytes_u16(pkt, version) /* * Random stuff. Filling of the server_random takes place in * tls_process_client_hello() */ - || !WPACKET_memcpy(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR); - goto err; + || !WPACKET_memcpy(pkt, + s->hello_retry_request == SSL_HRR_PENDING + ? hrrrandom : s->s3->server_random, + SSL3_RANDOM_SIZE)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_SERVER_HELLO, + ERR_R_INTERNAL_ERROR); + return 0; } /*- @@ -2040,6 +2333,8 @@ int tls_construct_server_hello(SSL *s, WPACKET *pkt) * session ID. * - However, if we want the new session to be single-use, * we send back a 0-length session ID. + * - In TLSv1.3 we echo back the session id sent to us by the client + * regardless * s->hit is non-zero in either case of session reuse, * so the following won't overwrite an ID that we're supposed * to send back. @@ -2049,53 +2344,73 @@ int tls_construct_server_hello(SSL *s, WPACKET *pkt) && !s->hit)) s->session->session_id_length = 0; - sl = s->session->session_id_length; + if (usetls13) { + sl = s->tmp_session_id_len; + session_id = s->tmp_session_id; + } else { + sl = s->session->session_id_length; + session_id = s->session->session_id; + } + if (sl > sizeof(s->session->session_id)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR); - goto err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_SERVER_HELLO, + ERR_R_INTERNAL_ERROR); + return 0; } /* set up the compression method */ #ifdef OPENSSL_NO_COMP compm = 0; #else - if (s->s3->tmp.new_compression == NULL) + if (usetls13 || s->s3->tmp.new_compression == NULL) compm = 0; else compm = s->s3->tmp.new_compression->id; #endif - if ((!SSL_IS_TLS13(s) - && !WPACKET_sub_memcpy_u8(pkt, s->session->session_id, sl)) + if (!WPACKET_sub_memcpy_u8(pkt, session_id, sl) || !s->method->put_cipher_by_char(s->s3->tmp.new_cipher, pkt, &len) - || (!SSL_IS_TLS13(s) - && !WPACKET_put_bytes_u8(pkt, compm)) + || !WPACKET_put_bytes_u8(pkt, compm) || !tls_construct_extensions(s, pkt, - SSL_IS_TLS13(s) - ? EXT_TLS1_3_SERVER_HELLO - : EXT_TLS1_2_SERVER_HELLO, - NULL, 0, &al)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR); - goto err; + s->hello_retry_request + == SSL_HRR_PENDING + ? SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST + : (SSL_IS_TLS13(s) + ? SSL_EXT_TLS1_3_SERVER_HELLO + : SSL_EXT_TLS1_2_SERVER_HELLO), + NULL, 0)) { + /* SSLfatal() already called */ + return 0; } - if (!(s->verify_mode & SSL_VERIFY_PEER) - && !ssl3_digest_cached_records(s, 0)) { - al = SSL_AD_INTERNAL_ERROR; - goto err; + if (s->hello_retry_request == SSL_HRR_PENDING) { + /* Ditch the session. We'll create a new one next time around */ + SSL_SESSION_free(s->session); + s->session = NULL; + s->hit = 0; + + /* + * Re-initialise the Transcript Hash. We're going to prepopulate it with + * a synthetic message_hash in place of ClientHello1. + */ + if (!create_synthetic_message_hash(s, NULL, 0, NULL, 0)) { + /* SSLfatal() already called */ + return 0; + } + } else if (!(s->verify_mode & SSL_VERIFY_PEER) + && !ssl3_digest_cached_records(s, 0)) { + /* SSLfatal() already called */; + return 0; } return 1; - err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - return 0; } int tls_construct_server_done(SSL *s, WPACKET *pkt) { if (!s->s3->tmp.cert_request) { if (!ssl3_digest_cached_records(s, 0)) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); + /* SSLfatal() already called */ return 0; } } @@ -2113,7 +2428,7 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) int curve_id = 0; #endif const SIGALG_LOOKUP *lu = s->s3->tmp.sigalg; - int al = SSL_AD_INTERNAL_ERROR, i; + int i; unsigned long type; const BIGNUM *r[4]; EVP_MD_CTX *md_ctx = EVP_MD_CTX_new(); @@ -2121,13 +2436,15 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) size_t paramlen, paramoffset; if (!WPACKET_get_total_written(pkt, ¶moffset)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + goto err; } if (md_ctx == NULL) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); + goto err; } type = s->s3->tmp.new_cipher->algorithm_mkey; @@ -2150,9 +2467,10 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) pkdh = EVP_PKEY_new(); if (pkdh == NULL || dhp == NULL) { DH_free(dhp); - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } EVP_PKEY_assign_DH(pkdh, dhp); pkdhp = pkdh; @@ -2163,39 +2481,46 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) DH *dhp = s->cert->dh_tmp_cb(s, 0, 1024); pkdh = ssl_dh_to_pkey(dhp); if (pkdh == NULL) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } pkdhp = pkdh; } if (pkdhp == NULL) { - al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - SSL_R_MISSING_TMP_DH_KEY); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + SSL_R_MISSING_TMP_DH_KEY); + goto err; } if (!ssl_security(s, SSL_SECOP_TMP_DH, EVP_PKEY_security_bits(pkdhp), 0, pkdhp)) { - al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - SSL_R_DH_KEY_TOO_SMALL); - goto f_err; + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + SSL_R_DH_KEY_TOO_SMALL); + goto err; } if (s->s3->tmp.pkey != NULL) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); goto err; } s->s3->tmp.pkey = ssl_generate_pkey(pkdhp); - if (s->s3->tmp.pkey == NULL) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_EVP_LIB); + /* SSLfatal() already called */ goto err; } dh = EVP_PKEY_get0_DH(s->s3->tmp.pkey); + if (dh == NULL) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; + } EVP_PKEY_free(pkdh); pkdh = NULL; @@ -2206,34 +2531,35 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) #endif #ifndef OPENSSL_NO_EC if (type & (SSL_kECDHE | SSL_kECDHEPSK)) { - int nid; if (s->s3->tmp.pkey != NULL) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); goto err; } /* Get NID of appropriate shared curve */ - nid = tls1_shared_group(s, -2); - curve_id = tls1_ec_nid2curve_id(nid); + curve_id = tls1_shared_group(s, -2); if (curve_id == 0) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); goto err; } - s->s3->tmp.pkey = ssl_generate_pkey_curve(curve_id); + s->s3->tmp.pkey = ssl_generate_pkey_group(s, curve_id); /* Generate a new key for this curve */ if (s->s3->tmp.pkey == NULL) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_EVP_LIB); - goto f_err; + /* SSLfatal() already called */ + goto err; } /* Encode the public key. */ encodedlen = EVP_PKEY_get1_tls_encodedpoint(s->s3->tmp.pkey, &encodedPoint); if (encodedlen == 0) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_EC_LIB); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_EC_LIB); goto err; } @@ -2252,8 +2578,9 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) if ((s->srp_ctx.N == NULL) || (s->srp_ctx.g == NULL) || (s->srp_ctx.s == NULL) || (s->srp_ctx.B == NULL)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - SSL_R_MISSING_SRP_PARAM); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + SSL_R_MISSING_SRP_PARAM); goto err; } r[0] = s->srp_ctx.N; @@ -2263,18 +2590,19 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) } else #endif { - al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); + goto err; } if (((s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) != 0) || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)) != 0) { lu = NULL; } else if (lu == NULL) { - al = SSL_AD_DECODE_ERROR; - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + goto err; } #ifndef OPENSSL_NO_PSK @@ -2289,9 +2617,10 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) if (len > PSK_MAX_IDENTITY_LEN || !WPACKET_sub_memcpy_u16(pkt, s->cert->psk_identity_hint, len)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } } #endif @@ -2308,9 +2637,10 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) res = WPACKET_start_sub_packet_u16(pkt); if (!res) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } #ifndef OPENSSL_NO_DH @@ -2324,9 +2654,10 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) if (len > 0) { if (!WPACKET_allocate_bytes(pkt, len, &binval)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } memset(binval, 0, len); } @@ -2334,9 +2665,10 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) #endif if (!WPACKET_allocate_bytes(pkt, BN_num_bytes(r[i]), &binval) || !WPACKET_close(pkt)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } BN_bn2bin(r[i], binval); @@ -2354,9 +2686,10 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) || !WPACKET_put_bytes_u8(pkt, 0) || !WPACKET_put_bytes_u8(pkt, curve_id) || !WPACKET_sub_memcpy_u8(pkt, encodedPoint, encodedlen)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } OPENSSL_free(encodedPoint); encodedPoint = NULL; @@ -2366,31 +2699,32 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) /* not anonymous */ if (lu != NULL) { EVP_PKEY *pkey = s->s3->tmp.cert->privatekey; - const EVP_MD *md = ssl_md(lu->hash_idx); - unsigned char *sigbytes1, *sigbytes2; - size_t siglen; + const EVP_MD *md; + unsigned char *sigbytes1, *sigbytes2, *tbs; + size_t siglen, tbslen; + int rv; - if (pkey == NULL || md == NULL) { + if (pkey == NULL || !tls1_lookup_md(lu, &md)) { /* Should never happen */ - al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } - /* - * n is the length of the params, they start at &(d[4]) and p - * points to the space at the end. - */ - /* Get length of the parameters we have written above */ if (!WPACKET_get_length(pkt, ¶mlen)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } /* send signature algorithm */ - if (SSL_USE_SIGALGS(s) && !WPACKET_put_bytes_u16(pkt, lu->sigalg)) - return 0; + if (SSL_USE_SIGALGS(s) && !WPACKET_put_bytes_u16(pkt, lu->sigalg)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; + } /* * Create the signature. We don't know the actual length of the sig * until after we've created it, so we reserve enough bytes for it @@ -2400,38 +2734,40 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) siglen = EVP_PKEY_size(pkey); if (!WPACKET_sub_reserve_bytes_u16(pkt, siglen, &sigbytes1) || EVP_DigestSignInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } if (lu->sig == EVP_PKEY_RSA_PSS) { if (EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) <= 0 || EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, RSA_PSS_SALTLEN_DIGEST) <= 0) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_EVP_LIB); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_EVP_LIB); + goto err; } } - if (EVP_DigestSignUpdate(md_ctx, &(s->s3->client_random[0]), - SSL3_RANDOM_SIZE) <= 0 - || EVP_DigestSignUpdate(md_ctx, &(s->s3->server_random[0]), - SSL3_RANDOM_SIZE) <= 0 - || EVP_DigestSignUpdate(md_ctx, - s->init_buf->data + paramoffset, - paramlen) <= 0 - || EVP_DigestSignFinal(md_ctx, sigbytes1, &siglen) <= 0 - || !WPACKET_sub_allocate_bytes_u16(pkt, siglen, &sigbytes2) + tbslen = construct_key_exchange_tbs(s, &tbs, + s->init_buf->data + paramoffset, + paramlen); + if (tbslen == 0) { + /* SSLfatal() already called */ + goto err; + } + rv = EVP_DigestSign(md_ctx, sigbytes1, &siglen, tbs, tbslen); + OPENSSL_free(tbs); + if (rv <= 0 || !WPACKET_sub_allocate_bytes_u16(pkt, siglen, &sigbytes2) || sigbytes1 != sigbytes2) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } } EVP_MD_CTX_free(md_ctx); return 1; - f_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); err: #ifndef OPENSSL_NO_DH EVP_PKEY_free(pkdh); @@ -2445,15 +2781,48 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) int tls_construct_certificate_request(SSL *s, WPACKET *pkt) { - int i; - STACK_OF(X509_NAME) *sk = NULL; + if (SSL_IS_TLS13(s)) { + /* Send random context when doing post-handshake auth */ + if (s->post_handshake_auth == SSL_PHA_REQUEST_PENDING) { + OPENSSL_free(s->pha_context); + s->pha_context_len = 32; + if ((s->pha_context = OPENSSL_malloc(s->pha_context_len)) == NULL + || RAND_bytes(s->pha_context, s->pha_context_len) <= 0 + || !WPACKET_sub_memcpy_u8(pkt, s->pha_context, s->pha_context_len)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, + ERR_R_INTERNAL_ERROR); + return 0; + } + /* reset the handshake hash back to just after the ClientFinished */ + if (!tls13_restore_handshake_digest_for_pha(s)) { + /* SSLfatal() already called */ + return 0; + } + } else { + if (!WPACKET_put_bytes_u8(pkt, 0)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, + ERR_R_INTERNAL_ERROR); + return 0; + } + } + + if (!tls_construct_extensions(s, pkt, + SSL_EXT_TLS1_3_CERTIFICATE_REQUEST, NULL, + 0)) { + /* SSLfatal() already called */ + return 0; + } + goto done; + } /* get the list of acceptable cert types */ if (!WPACKET_start_sub_packet_u8(pkt) - || !ssl3_get_req_cert_type(s, pkt) - || !WPACKET_close(pkt)) { - SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); - goto err; + || !ssl3_get_req_cert_type(s, pkt) || !WPACKET_close(pkt)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); + return 0; } if (SSL_USE_SIGALGS(s)) { @@ -2461,54 +2830,28 @@ int tls_construct_certificate_request(SSL *s, WPACKET *pkt) size_t nl = tls12_get_psigalgs(s, 1, &psigs); if (!WPACKET_start_sub_packet_u16(pkt) + || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH) || !tls12_copy_sigalgs(s, pkt, psigs, nl) || !WPACKET_close(pkt)) { - SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, - ERR_R_INTERNAL_ERROR); - goto err; - } - } - - /* Start sub-packet for client CA list */ - if (!WPACKET_start_sub_packet_u16(pkt)) { - SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); - goto err; - } - - sk = SSL_get_client_CA_list(s); - if (sk != NULL) { - for (i = 0; i < sk_X509_NAME_num(sk); i++) { - unsigned char *namebytes; - X509_NAME *name = sk_X509_NAME_value(sk, i); - int namelen; - - if (name == NULL - || (namelen = i2d_X509_NAME(name, NULL)) < 0 - || !WPACKET_sub_allocate_bytes_u16(pkt, namelen, - &namebytes) - || i2d_X509_NAME(name, &namebytes) != namelen) { - SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, - ERR_R_INTERNAL_ERROR); - goto err; - } + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, + ERR_R_INTERNAL_ERROR); + return 0; } } - /* else no CA names */ - if (!WPACKET_close(pkt)) { - SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); - goto err; + if (!construct_ca_names(s, pkt)) { + /* SSLfatal() already called */ + return 0; } + done: + s->certreqs_sent++; s->s3->tmp.cert_request = 1; - return 1; - err: - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); - return 0; } -static int tls_process_cke_psk_preamble(SSL *s, PACKET *pkt, int *al) +static int tls_process_cke_psk_preamble(SSL *s, PACKET *pkt) { #ifndef OPENSSL_NO_PSK unsigned char psk[PSK_MAX_PSK_LEN]; @@ -2516,24 +2859,24 @@ static int tls_process_cke_psk_preamble(SSL *s, PACKET *pkt, int *al) PACKET psk_identity; if (!PACKET_get_length_prefixed_2(pkt, &psk_identity)) { - *al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH); + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, + SSL_R_LENGTH_MISMATCH); return 0; } if (PACKET_remaining(&psk_identity) > PSK_MAX_IDENTITY_LEN) { - *al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG); + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, + SSL_R_DATA_LENGTH_TOO_LONG); return 0; } if (s->psk_server_callback == NULL) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_SERVER_CB); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, + SSL_R_PSK_NO_SERVER_CB); return 0; } if (!PACKET_strndup(&psk_identity, &s->session->psk_identity)) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, + ERR_R_INTERNAL_ERROR); return 0; } @@ -2541,16 +2884,16 @@ static int tls_process_cke_psk_preamble(SSL *s, PACKET *pkt, int *al) psk, sizeof(psk)); if (psklen > PSK_MAX_PSK_LEN) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, + ERR_R_INTERNAL_ERROR); return 0; } else if (psklen == 0) { /* * PSK related to the given identity not found */ - *al = SSL_AD_UNKNOWN_PSK_IDENTITY; - SSLerr(SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, - SSL_R_PSK_IDENTITY_NOT_FOUND); + SSLfatal(s, SSL_AD_UNKNOWN_PSK_IDENTITY, + SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, + SSL_R_PSK_IDENTITY_NOT_FOUND); return 0; } @@ -2559,8 +2902,8 @@ static int tls_process_cke_psk_preamble(SSL *s, PACKET *pkt, int *al) OPENSSL_cleanse(psk, psklen); if (s->s3->tmp.psk == NULL) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); return 0; } @@ -2569,13 +2912,13 @@ static int tls_process_cke_psk_preamble(SSL *s, PACKET *pkt, int *al) return 1; #else /* Should never happen */ - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, + ERR_R_INTERNAL_ERROR); return 0; #endif } -static int tls_process_cke_rsa(SSL *s, PACKET *pkt, int *al) +static int tls_process_cke_rsa(SSL *s, PACKET *pkt) { #ifndef OPENSSL_NO_RSA unsigned char rand_premaster_secret[SSL_MAX_MASTER_KEY_LENGTH]; @@ -2589,8 +2932,8 @@ static int tls_process_cke_rsa(SSL *s, PACKET *pkt, int *al) rsa = EVP_PKEY_get0_RSA(s->cert->pkeys[SSL_PKEY_RSA].privatekey); if (rsa == NULL) { - *al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CKE_RSA, SSL_R_MISSING_RSA_CERTIFICATE); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + SSL_R_MISSING_RSA_CERTIFICATE); return 0; } @@ -2600,8 +2943,8 @@ static int tls_process_cke_rsa(SSL *s, PACKET *pkt, int *al) } else { if (!PACKET_get_length_prefixed_2(pkt, &enc_premaster) || PACKET_remaining(pkt) != 0) { - *al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_RSA, SSL_R_LENGTH_MISMATCH); + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + SSL_R_LENGTH_MISMATCH); return 0; } } @@ -2613,15 +2956,15 @@ static int tls_process_cke_rsa(SSL *s, PACKET *pkt, int *al) * their ciphertext cannot accommodate a premaster secret anyway. */ if (RSA_size(rsa) < SSL_MAX_MASTER_KEY_LENGTH) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_RSA, RSA_R_KEY_SIZE_TOO_SMALL); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + RSA_R_KEY_SIZE_TOO_SMALL); return 0; } rsa_decrypt = OPENSSL_malloc(RSA_size(rsa)); if (rsa_decrypt == NULL) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_RSA, ERR_R_MALLOC_FAILURE); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + ERR_R_MALLOC_FAILURE); return 0; } @@ -2633,8 +2976,12 @@ static int tls_process_cke_rsa(SSL *s, PACKET *pkt, int *al) * fails. See https://tools.ietf.org/html/rfc5246#section-7.4.7.1 */ - if (RAND_bytes(rand_premaster_secret, sizeof(rand_premaster_secret)) <= 0) + if (RAND_priv_bytes(rand_premaster_secret, + sizeof(rand_premaster_secret)) <= 0) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + ERR_R_INTERNAL_ERROR); goto err; + } /* * Decrypt with no padding. PKCS#1 padding will be removed as part of @@ -2644,8 +2991,11 @@ static int tls_process_cke_rsa(SSL *s, PACKET *pkt, int *al) decrypt_len = (int)RSA_private_decrypt((int)PACKET_remaining(&enc_premaster), PACKET_data(&enc_premaster), rsa_decrypt, rsa, RSA_NO_PADDING); - if (decrypt_len < 0) + if (decrypt_len < 0) { + SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + ERR_R_INTERNAL_ERROR); goto err; + } /* Check the padding. See RFC 3447, section 7.2.2. */ @@ -2655,8 +3005,8 @@ static int tls_process_cke_rsa(SSL *s, PACKET *pkt, int *al) * PS is at least 8 bytes. */ if (decrypt_len < 11 + SSL_MAX_MASTER_KEY_LENGTH) { - *al = SSL_AD_DECRYPT_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_RSA, SSL_R_DECRYPTION_FAILED); + SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + SSL_R_DECRYPTION_FAILED); goto err; } @@ -2723,8 +3073,7 @@ static int tls_process_cke_rsa(SSL *s, PACKET *pkt, int *al) if (!ssl_generate_master_secret(s, rsa_decrypt + padding_len, sizeof(rand_premaster_secret), 0)) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_RSA, ERR_R_INTERNAL_ERROR); + /* SSLfatal() already called */ goto err; } @@ -2734,13 +3083,13 @@ static int tls_process_cke_rsa(SSL *s, PACKET *pkt, int *al) return ret; #else /* Should never happen */ - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_RSA, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + ERR_R_INTERNAL_ERROR); return 0; #endif } -static int tls_process_cke_dhe(SSL *s, PACKET *pkt, int *al) +static int tls_process_cke_dhe(SSL *s, PACKET *pkt) { #ifndef OPENSSL_NO_DH EVP_PKEY *skey = NULL; @@ -2752,47 +3101,47 @@ static int tls_process_cke_dhe(SSL *s, PACKET *pkt, int *al) int ret = 0; if (!PACKET_get_net_2(pkt, &i) || PACKET_remaining(pkt) != i) { - *al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CKE_DHE, + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); goto err; } skey = s->s3->tmp.pkey; if (skey == NULL) { - *al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CKE_DHE, SSL_R_MISSING_TMP_DH_KEY); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, + SSL_R_MISSING_TMP_DH_KEY); goto err; } if (PACKET_remaining(pkt) == 0L) { - *al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CKE_DHE, SSL_R_MISSING_TMP_DH_KEY); + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, + SSL_R_MISSING_TMP_DH_KEY); goto err; } if (!PACKET_get_bytes(pkt, &data, i)) { /* We already checked we have enough data */ - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_DHE, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, + ERR_R_INTERNAL_ERROR); goto err; } ckey = EVP_PKEY_new(); if (ckey == NULL || EVP_PKEY_copy_parameters(ckey, skey) == 0) { - SSLerr(SSL_F_TLS_PROCESS_CKE_DHE, SSL_R_BN_LIB); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, + SSL_R_BN_LIB); goto err; } cdh = EVP_PKEY_get0_DH(ckey); pub_key = BN_bin2bn(data, i, NULL); if (pub_key == NULL || !DH_set0_key(cdh, pub_key, NULL)) { - SSLerr(SSL_F_TLS_PROCESS_CKE_DHE, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, + ERR_R_INTERNAL_ERROR); if (pub_key != NULL) BN_free(pub_key); goto err; } if (ssl_derive(s, skey, ckey, 1) == 0) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_DHE, ERR_R_INTERNAL_ERROR); + /* SSLfatal() already called */ goto err; } @@ -2804,13 +3153,13 @@ static int tls_process_cke_dhe(SSL *s, PACKET *pkt, int *al) return ret; #else /* Should never happen */ - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_DHE, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, + ERR_R_INTERNAL_ERROR); return 0; #endif } -static int tls_process_cke_ecdhe(SSL *s, PACKET *pkt, int *al) +static int tls_process_cke_ecdhe(SSL *s, PACKET *pkt) { #ifndef OPENSSL_NO_EC EVP_PKEY *skey = s->s3->tmp.pkey; @@ -2819,8 +3168,8 @@ static int tls_process_cke_ecdhe(SSL *s, PACKET *pkt, int *al) if (PACKET_remaining(pkt) == 0L) { /* We don't support ECDH client auth */ - *al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CKE_ECDHE, SSL_R_MISSING_TMP_ECDH_KEY); + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PROCESS_CKE_ECDHE, + SSL_R_MISSING_TMP_ECDH_KEY); goto err; } else { unsigned int i; @@ -2834,25 +3183,25 @@ static int tls_process_cke_ecdhe(SSL *s, PACKET *pkt, int *al) /* Get encoded point length */ if (!PACKET_get_1(pkt, &i) || !PACKET_get_bytes(pkt, &data, i) || PACKET_remaining(pkt) != 0) { - *al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_ECDHE, SSL_R_LENGTH_MISMATCH); + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_ECDHE, + SSL_R_LENGTH_MISMATCH); goto err; } ckey = EVP_PKEY_new(); if (ckey == NULL || EVP_PKEY_copy_parameters(ckey, skey) <= 0) { - SSLerr(SSL_F_TLS_PROCESS_CKE_ECDHE, ERR_R_EVP_LIB); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_ECDHE, + ERR_R_EVP_LIB); goto err; } if (EVP_PKEY_set1_tls_encodedpoint(ckey, data, i) == 0) { - *al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CKE_ECDHE, ERR_R_EC_LIB); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_ECDHE, + ERR_R_EC_LIB); goto err; } } if (ssl_derive(s, skey, ckey, 1) == 0) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_ECDHE, ERR_R_INTERNAL_ERROR); + /* SSLfatal() already called */ goto err; } @@ -2865,13 +3214,13 @@ static int tls_process_cke_ecdhe(SSL *s, PACKET *pkt, int *al) return ret; #else /* Should never happen */ - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_ECDHE, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_ECDHE, + ERR_R_INTERNAL_ERROR); return 0; #endif } -static int tls_process_cke_srp(SSL *s, PACKET *pkt, int *al) +static int tls_process_cke_srp(SSL *s, PACKET *pkt) { #ifndef OPENSSL_NO_SRP unsigned int i; @@ -2879,41 +3228,43 @@ static int tls_process_cke_srp(SSL *s, PACKET *pkt, int *al) if (!PACKET_get_net_2(pkt, &i) || !PACKET_get_bytes(pkt, &data, i)) { - *al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_SRP, SSL_R_BAD_SRP_A_LENGTH); + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_SRP, + SSL_R_BAD_SRP_A_LENGTH); return 0; } if ((s->srp_ctx.A = BN_bin2bn(data, i, NULL)) == NULL) { - SSLerr(SSL_F_TLS_PROCESS_CKE_SRP, ERR_R_BN_LIB); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_SRP, + ERR_R_BN_LIB); return 0; } if (BN_ucmp(s->srp_ctx.A, s->srp_ctx.N) >= 0 || BN_is_zero(s->srp_ctx.A)) { - *al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_TLS_PROCESS_CKE_SRP, SSL_R_BAD_SRP_PARAMETERS); + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PROCESS_CKE_SRP, + SSL_R_BAD_SRP_PARAMETERS); return 0; } OPENSSL_free(s->session->srp_username); s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); if (s->session->srp_username == NULL) { - SSLerr(SSL_F_TLS_PROCESS_CKE_SRP, ERR_R_MALLOC_FAILURE); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_SRP, + ERR_R_MALLOC_FAILURE); return 0; } if (!srp_generate_server_master_secret(s)) { - SSLerr(SSL_F_TLS_PROCESS_CKE_SRP, ERR_R_INTERNAL_ERROR); + /* SSLfatal() already called */ return 0; } return 1; #else /* Should never happen */ - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_SRP, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_SRP, + ERR_R_INTERNAL_ERROR); return 0; #endif } -static int tls_process_cke_gost(SSL *s, PACKET *pkt, int *al) +static int tls_process_cke_gost(SSL *s, PACKET *pkt) { #ifndef OPENSSL_NO_GOST EVP_PKEY_CTX *pkey_ctx; @@ -2922,11 +3273,9 @@ static int tls_process_cke_gost(SSL *s, PACKET *pkt, int *al) const unsigned char *start; size_t outlen = 32, inlen; unsigned long alg_a; - int Ttag, Tclass; - long Tlen; - size_t sess_key_len; - const unsigned char *data; + unsigned int asn1id, asn1len; int ret = 0; + PACKET encdata; /* Get our certificate private key */ alg_a = s->s3->tmp.new_cipher->algorithm_auth; @@ -2947,13 +3296,13 @@ static int tls_process_cke_gost(SSL *s, PACKET *pkt, int *al) pkey_ctx = EVP_PKEY_CTX_new(pk, NULL); if (pkey_ctx == NULL) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_GOST, ERR_R_MALLOC_FAILURE); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, + ERR_R_MALLOC_FAILURE); return 0; } if (EVP_PKEY_decrypt_init(pkey_ctx) <= 0) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_GOST, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, + ERR_R_INTERNAL_ERROR); return 0; } /* @@ -2968,38 +3317,57 @@ static int tls_process_cke_gost(SSL *s, PACKET *pkt, int *al) ERR_clear_error(); } /* Decrypt session key */ - sess_key_len = PACKET_remaining(pkt); - if (!PACKET_get_bytes(pkt, &data, sess_key_len)) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_GOST, ERR_R_INTERNAL_ERROR); + if (!PACKET_get_1(pkt, &asn1id) + || asn1id != (V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED) + || !PACKET_peek_1(pkt, &asn1len)) { + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, + SSL_R_DECRYPTION_FAILED); goto err; } - /* TODO(size_t): Convert this function */ - if (ASN1_get_object((const unsigned char **)&data, &Tlen, &Ttag, - &Tclass, (long)sess_key_len) != V_ASN1_CONSTRUCTED - || Ttag != V_ASN1_SEQUENCE || Tclass != V_ASN1_UNIVERSAL) { - *al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_GOST, SSL_R_DECRYPTION_FAILED); + if (asn1len == 0x81) { + /* + * Long form length. Should only be one byte of length. Anything else + * isn't supported. + * We did a successful peek before so this shouldn't fail + */ + if (!PACKET_forward(pkt, 1)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, + SSL_R_DECRYPTION_FAILED); + goto err; + } + } else if (asn1len >= 0x80) { + /* + * Indefinite length, or more than one long form length bytes. We don't + * support it + */ + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, + SSL_R_DECRYPTION_FAILED); + goto err; + } /* else short form length */ + + if (!PACKET_as_length_prefixed_1(pkt, &encdata)) { + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, + SSL_R_DECRYPTION_FAILED); goto err; } - start = data; - inlen = Tlen; - if (EVP_PKEY_decrypt - (pkey_ctx, premaster_secret, &outlen, start, inlen) <= 0) { - *al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_GOST, SSL_R_DECRYPTION_FAILED); + inlen = PACKET_remaining(&encdata); + start = PACKET_data(&encdata); + + if (EVP_PKEY_decrypt(pkey_ctx, premaster_secret, &outlen, start, + inlen) <= 0) { + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, + SSL_R_DECRYPTION_FAILED); goto err; } /* Generate master secret */ if (!ssl_generate_master_secret(s, premaster_secret, sizeof(premaster_secret), 0)) { - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_GOST, ERR_R_INTERNAL_ERROR); + /* SSLfatal() already called */ goto err; } /* Check if pubkey from client certificate was used */ - if (EVP_PKEY_CTX_ctrl - (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) + if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, + NULL) > 0) s->statem.no_cert_verify = 1; ret = 1; @@ -3008,68 +3376,75 @@ static int tls_process_cke_gost(SSL *s, PACKET *pkt, int *al) return ret; #else /* Should never happen */ - *al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CKE_GOST, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, + ERR_R_INTERNAL_ERROR); return 0; #endif } MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt) { - int al = -1; unsigned long alg_k; alg_k = s->s3->tmp.new_cipher->algorithm_mkey; /* For PSK parse and retrieve identity, obtain PSK key */ - if ((alg_k & SSL_PSK) && !tls_process_cke_psk_preamble(s, pkt, &al)) + if ((alg_k & SSL_PSK) && !tls_process_cke_psk_preamble(s, pkt)) { + /* SSLfatal() already called */ goto err; + } if (alg_k & SSL_kPSK) { /* Identity extracted earlier: should be nothing left */ if (PACKET_remaining(pkt) != 0) { - al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, - SSL_R_LENGTH_MISMATCH); + SSLfatal(s, SSL_AD_DECODE_ERROR, + SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, + SSL_R_LENGTH_MISMATCH); goto err; } /* PSK handled by ssl_generate_master_secret */ if (!ssl_generate_master_secret(s, NULL, 0, 0)) { - al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + /* SSLfatal() already called */ goto err; } } else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { - if (!tls_process_cke_rsa(s, pkt, &al)) + if (!tls_process_cke_rsa(s, pkt)) { + /* SSLfatal() already called */ goto err; + } } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { - if (!tls_process_cke_dhe(s, pkt, &al)) + if (!tls_process_cke_dhe(s, pkt)) { + /* SSLfatal() already called */ goto err; + } } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { - if (!tls_process_cke_ecdhe(s, pkt, &al)) + if (!tls_process_cke_ecdhe(s, pkt)) { + /* SSLfatal() already called */ goto err; + } } else if (alg_k & SSL_kSRP) { - if (!tls_process_cke_srp(s, pkt, &al)) + if (!tls_process_cke_srp(s, pkt)) { + /* SSLfatal() already called */ goto err; + } } else if (alg_k & SSL_kGOST) { - if (!tls_process_cke_gost(s, pkt, &al)) + if (!tls_process_cke_gost(s, pkt)) { + /* SSLfatal() already called */ goto err; + } } else { - al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, - SSL_R_UNKNOWN_CIPHER_TYPE); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_PROCESS_CLIENT_KEY_EXCHANGE, + SSL_R_UNKNOWN_CIPHER_TYPE); goto err; } return MSG_PROCESS_CONTINUE_PROCESSING; err: - if (al != -1) - ssl3_send_alert(s, SSL3_AL_FATAL, al); #ifndef OPENSSL_NO_PSK OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); s->s3->tmp.psk = NULL; #endif - ossl_statem_set_error(s); return MSG_PROCESS_ERROR; } @@ -3091,32 +3466,15 @@ WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst) sizeof(sctpauthkey), labelbuffer, sizeof(labelbuffer), NULL, 0, 0) <= 0) { - ossl_statem_set_error(s); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_POST_PROCESS_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); return WORK_ERROR; } BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, sizeof(sctpauthkey), sctpauthkey); } - wst = WORK_MORE_B; - } - - if ((wst == WORK_MORE_B) - /* Is this SCTP? */ - && BIO_dgram_is_sctp(SSL_get_wbio(s)) - /* Are we renegotiating? */ - && s->renegotiate - /* Are we going to skip the CertificateVerify? */ - && (s->session->peer == NULL || s->statem.no_cert_verify) - && 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)); - ossl_statem_set_sctp_read_sock(s, 1); - return WORK_MORE_B; - } else { - ossl_statem_set_sctp_read_sock(s, 0); } #endif @@ -3126,15 +3484,15 @@ WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst) * the handshake_buffer */ if (!ssl3_digest_cached_records(s, 0)) { - ossl_statem_set_error(s); + /* SSLfatal() already called */ return WORK_ERROR; } return WORK_FINISHED_CONTINUE; } else { if (!s->s3->handshake_buffer) { - SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - ossl_statem_set_error(s); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_POST_PROCESS_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); return WORK_ERROR; } /* @@ -3142,7 +3500,7 @@ WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst) * extms we've done this already so this is a no-op */ if (!ssl3_digest_cached_records(s, 1)) { - ossl_statem_set_error(s); + /* SSLfatal() already called */ return WORK_ERROR; } } @@ -3152,49 +3510,59 @@ WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst) MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt) { - int i, al = SSL_AD_INTERNAL_ERROR, ret = MSG_PROCESS_ERROR; + int i; + MSG_PROCESS_RETURN ret = MSG_PROCESS_ERROR; X509 *x = NULL; - unsigned long l, llen; + unsigned long l; const unsigned char *certstart, *certbytes; STACK_OF(X509) *sk = NULL; PACKET spkt, context; size_t chainidx; + SSL_SESSION *new_sess = NULL; if ((sk = sk_X509_new_null()) == NULL) { - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + ERR_R_MALLOC_FAILURE); + goto err; + } + + if (SSL_IS_TLS13(s) && (!PACKET_get_length_prefixed_1(pkt, &context) + || (s->pha_context == NULL && PACKET_remaining(&context) != 0) + || (s->pha_context != NULL && + !PACKET_equal(&context, s->pha_context, s->pha_context_len)))) { + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + SSL_R_INVALID_CONTEXT); + goto err; } - /* TODO(TLS1.3): For now we ignore the context. We need to verify this */ - if ((SSL_IS_TLS13(s) && !PACKET_get_length_prefixed_1(pkt, &context)) - || !PACKET_get_net_3(pkt, &llen) - || !PACKET_get_sub_packet(pkt, &spkt, llen) + if (!PACKET_get_length_prefixed_3(pkt, &spkt) || PACKET_remaining(pkt) != 0) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, SSL_R_LENGTH_MISMATCH); - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + SSL_R_LENGTH_MISMATCH); + goto err; } for (chainidx = 0; PACKET_remaining(&spkt) > 0; chainidx++) { if (!PACKET_get_net_3(&spkt, &l) || !PACKET_get_bytes(&spkt, &certbytes, l)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, - SSL_R_CERT_LENGTH_MISMATCH); - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + SSL_R_CERT_LENGTH_MISMATCH); + goto err; } certstart = certbytes; x = d2i_X509(NULL, (const unsigned char **)&certbytes, l); if (x == NULL) { - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_ASN1_LIB); - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_ASN1_LIB); + goto err; } if (certbytes != (certstart + l)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, - SSL_R_CERT_LENGTH_MISMATCH); - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + SSL_R_CERT_LENGTH_MISMATCH); + goto err; } if (SSL_IS_TLS13(s)) { @@ -3202,23 +3570,28 @@ MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt) PACKET extensions; if (!PACKET_get_length_prefixed_2(&spkt, &extensions)) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, SSL_R_BAD_LENGTH); - goto f_err; + SSLfatal(s, SSL_AD_DECODE_ERROR, + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + SSL_R_BAD_LENGTH); + goto err; } - if (!tls_collect_extensions(s, &extensions, EXT_TLS1_3_CERTIFICATE, - &rawexts, &al, NULL) - || !tls_parse_all_extensions(s, EXT_TLS1_3_CERTIFICATE, - rawexts, x, chainidx, &al)) { + if (!tls_collect_extensions(s, &extensions, + SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, + NULL, chainidx == 0) + || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, + rawexts, x, chainidx, + PACKET_remaining(&spkt) == 0)) { OPENSSL_free(rawexts); - goto f_err; + goto err; } OPENSSL_free(rawexts); } if (!sk_X509_push(sk, x)) { - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); - goto f_err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + ERR_R_MALLOC_FAILURE); + goto err; } x = NULL; } @@ -3226,44 +3599,74 @@ MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt) if (sk_X509_num(sk) <= 0) { /* TLS does not mind 0 certs returned */ if (s->version == SSL3_VERSION) { - al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, - SSL_R_NO_CERTIFICATES_RETURNED); - goto f_err; + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + SSL_R_NO_CERTIFICATES_RETURNED); + goto err; } /* Fail for TLS only if we required a certificate */ else if ((s->verify_mode & SSL_VERIFY_PEER) && (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) { - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, - SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); - al = SSL_AD_HANDSHAKE_FAILURE; - goto f_err; + SSLfatal(s, SSL_AD_CERTIFICATE_REQUIRED, + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); + goto err; } /* No client certificate so digest cached records */ if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s, 0)) { - goto f_err; + /* SSLfatal() already called */ + goto err; } } else { EVP_PKEY *pkey; i = ssl_verify_cert_chain(s, sk); if (i <= 0) { - al = ssl_verify_alarm_type(s->verify_result); - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, - SSL_R_CERTIFICATE_VERIFY_FAILED); - goto f_err; + SSLfatal(s, ssl_x509err2alert(s->verify_result), + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + SSL_R_CERTIFICATE_VERIFY_FAILED); + goto err; } if (i > 1) { - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, i); - al = SSL_AD_HANDSHAKE_FAILURE; - goto f_err; + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, i); + goto err; } pkey = X509_get0_pubkey(sk_X509_value(sk, 0)); if (pkey == NULL) { - al = SSL3_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, - SSL_R_UNKNOWN_CERTIFICATE_TYPE); - goto f_err; + SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + SSL_R_UNKNOWN_CERTIFICATE_TYPE); + goto err; + } + } + + /* + * Sessions must be immutable once they go into the session cache. Otherwise + * we can get multi-thread problems. Therefore we don't "update" sessions, + * we replace them with a duplicate. Here, we need to do this every time + * a new certificate is received via post-handshake authentication, as the + * session may have already gone into the session cache. + */ + + if (s->post_handshake_auth == SSL_PHA_REQUESTED) { + int m = s->session_ctx->session_cache_mode; + + if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, + ERR_R_MALLOC_FAILURE); + goto err; } + + if (m & SSL_SESS_CACHE_SERVER) { + /* + * Remove the old session from the cache. We carry on if this fails + */ + SSL_CTX_remove_session(s->session_ctx, s->session); + } + + SSL_SESSION_free(s->session); + s->session = new_sess; } X509_free(s->session->peer); @@ -3278,9 +3681,8 @@ MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt) * message */ if (SSL_IS_TLS13(s) && !ssl3_digest_cached_records(s, 1)) { - al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); - goto f_err; + /* SSLfatal() already called */ + goto err; } /* @@ -3290,22 +3692,21 @@ MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt) sk = NULL; /* Save the current hash state for when we receive the CertificateVerify */ - if (SSL_IS_TLS13(s) - && !ssl_handshake_hash(s, s->cert_verify_hash, - sizeof(s->cert_verify_hash), - &s->cert_verify_hash_len)) { - al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); - goto f_err; + if (SSL_IS_TLS13(s)) { + if (!ssl_handshake_hash(s, s->cert_verify_hash, + sizeof(s->cert_verify_hash), + &s->cert_verify_hash_len)) { + /* SSLfatal() already called */ + goto err; + } + + /* Resend session tickets */ + s->sent_tickets = 0; } ret = MSG_PROCESS_CONTINUE_READING; - goto done; - f_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - ossl_statem_set_error(s); - done: + err: X509_free(x); sk_X509_pop_free(sk, X509_free); return ret; @@ -3314,10 +3715,10 @@ MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt) int tls_construct_server_certificate(SSL *s, WPACKET *pkt) { CERT_PKEY *cpk = s->s3->tmp.cert; - int al = SSL_AD_INTERNAL_ERROR; if (cpk == NULL) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); return 0; } @@ -3325,17 +3726,57 @@ int tls_construct_server_certificate(SSL *s, WPACKET *pkt) * In TLSv1.3 the certificate chain is always preceded by a 0 length context * for the server Certificate message */ - if ((SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) - || !ssl3_output_cert_chain(s, pkt, cpk, &al)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); - ssl3_send_alert(s, SSL3_AL_FATAL, al); + if (SSL_IS_TLS13(s) && !WPACKET_put_bytes_u8(pkt, 0)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); + return 0; + } + if (!ssl3_output_cert_chain(s, pkt, cpk)) { + /* SSLfatal() already called */ return 0; } return 1; } -int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt) +static int create_ticket_prequel(SSL *s, WPACKET *pkt, uint32_t age_add, + unsigned char *tick_nonce) +{ + /* + * Ticket lifetime hint: For TLSv1.2 this is advisory only and we leave this + * unspecified for resumed session (for simplicity). + * In TLSv1.3 we reset the "time" field above, and always specify the + * timeout. + */ + if (!WPACKET_put_bytes_u32(pkt, + (s->hit && !SSL_IS_TLS13(s)) + ? 0 : s->session->timeout)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CREATE_TICKET_PREQUEL, + ERR_R_INTERNAL_ERROR); + return 0; + } + + if (SSL_IS_TLS13(s)) { + if (!WPACKET_put_bytes_u32(pkt, age_add) + || !WPACKET_sub_memcpy_u8(pkt, tick_nonce, TICKET_NONCE_SIZE)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CREATE_TICKET_PREQUEL, + ERR_R_INTERNAL_ERROR); + return 0; + } + } + + /* Start the sub-packet for the actual ticket data */ + if (!WPACKET_start_sub_packet_u16(pkt)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CREATE_TICKET_PREQUEL, + ERR_R_INTERNAL_ERROR); + return 0; + } + + return 1; +} + +static int construct_stateless_ticket(SSL *s, WPACKET *pkt, uint32_t age_add, + unsigned char *tick_nonce) { unsigned char *senc = NULL; EVP_CIPHER_CTX *ctx = NULL; @@ -3348,18 +3789,8 @@ int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt) SSL_CTX *tctx = s->session_ctx; unsigned char iv[EVP_MAX_IV_LENGTH]; unsigned char key_name[TLSEXT_KEYNAME_LENGTH]; - int iv_len, al = SSL_AD_INTERNAL_ERROR; + int iv_len, ok = 0; size_t macoffset, macendoffset; - union { - unsigned char age_add_c[sizeof(uint32_t)]; - uint32_t age_add; - } age_add_u; - - if (SSL_IS_TLS13(s)) { - if (RAND_bytes(age_add_u.age_add_c, sizeof(age_add_u)) <= 0) - goto err; - s->session->ext.tick_age_add = age_add_u.age_add; - } /* get session encoding length */ slen_full = i2d_SSL_SESSION(s->session, NULL); @@ -3368,42 +3799,55 @@ int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt) * long */ if (slen_full == 0 || slen_full > 0xFF00) { - ossl_statem_set_error(s); - return 0; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, + ERR_R_INTERNAL_ERROR); + goto err; } senc = OPENSSL_malloc(slen_full); if (senc == NULL) { - ossl_statem_set_error(s); - return 0; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_CONSTRUCT_STATELESS_TICKET, ERR_R_MALLOC_FAILURE); + goto err; } ctx = EVP_CIPHER_CTX_new(); hctx = HMAC_CTX_new(); if (ctx == NULL || hctx == NULL) { - SSLerr(SSL_F_TLS_CONSTRUCT_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, + ERR_R_MALLOC_FAILURE); goto err; } p = senc; - if (!i2d_SSL_SESSION(s->session, &p)) + if (!i2d_SSL_SESSION(s->session, &p)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, + ERR_R_INTERNAL_ERROR); goto err; + } /* * create a fresh copy (not shared with other threads) to clean up */ const_p = senc; sess = d2i_SSL_SESSION(NULL, &const_p, slen_full); - if (sess == NULL) + if (sess == NULL) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, + ERR_R_INTERNAL_ERROR); goto err; - sess->session_id_length = 0; /* ID is irrelevant for the ticket */ + } slen = i2d_SSL_SESSION(sess, NULL); - if (slen == 0 || slen > slen_full) { /* shouldn't ever happen */ + if (slen == 0 || slen > slen_full) { + /* shouldn't ever happen */ + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, + ERR_R_INTERNAL_ERROR); SSL_SESSION_free(sess); goto err; } p = senc; if (!i2d_SSL_SESSION(sess, &p)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, + ERR_R_INTERNAL_ERROR); SSL_SESSION_free(sess); goto err; } @@ -3423,8 +3867,9 @@ int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt) /* Put timeout and length */ if (!WPACKET_put_bytes_u32(pkt, 0) || !WPACKET_put_bytes_u16(pkt, 0)) { - SSLerr(SSL_F_TLS_CONSTRUCT_NEW_SESSION_TICKET, - ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_CONSTRUCT_STATELESS_TICKET, + ERR_R_INTERNAL_ERROR); goto err; } OPENSSL_free(senc); @@ -3432,37 +3877,36 @@ int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt) HMAC_CTX_free(hctx); return 1; } - if (ret < 0) + if (ret < 0) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, + SSL_R_CALLBACK_FAILED); goto err; + } iv_len = EVP_CIPHER_CTX_iv_length(ctx); } else { const EVP_CIPHER *cipher = EVP_aes_256_cbc(); iv_len = EVP_CIPHER_iv_length(cipher); - if (RAND_bytes(iv, iv_len) <= 0) - goto err; - if (!EVP_EncryptInit_ex(ctx, cipher, NULL, - tctx->ext.tick_aes_key, iv)) - goto err; - if (!HMAC_Init_ex(hctx, tctx->ext.tick_hmac_key, - sizeof(tctx->ext.tick_hmac_key), - EVP_sha256(), NULL)) + if (RAND_bytes(iv, iv_len) <= 0 + || !EVP_EncryptInit_ex(ctx, cipher, NULL, + tctx->ext.secure->tick_aes_key, iv) + || !HMAC_Init_ex(hctx, tctx->ext.secure->tick_hmac_key, + sizeof(tctx->ext.secure->tick_hmac_key), + EVP_sha256(), NULL)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, + ERR_R_INTERNAL_ERROR); goto err; + } memcpy(key_name, tctx->ext.tick_key_name, sizeof(tctx->ext.tick_key_name)); } - /* - * Ticket lifetime hint (advisory only): We leave this unspecified - * for resumed session (for simplicity), and guess that tickets for - * new sessions will live as long as their sessions. - */ - if (!WPACKET_put_bytes_u32(pkt, s->hit ? 0 : s->session->timeout) - || (SSL_IS_TLS13(s) - && !WPACKET_put_bytes_u32(pkt, age_add_u.age_add)) - /* Now the actual ticket data */ - || !WPACKET_start_sub_packet_u16(pkt) - || !WPACKET_get_total_written(pkt, &macoffset) + if (!create_ticket_prequel(s, pkt, age_add, tick_nonce)) { + /* SSLfatal() already called */ + goto err; + } + + if (!WPACKET_get_total_written(pkt, &macoffset) /* Output key name */ || !WPACKET_memcpy(pkt, key_name, sizeof(key_name)) /* output IV */ @@ -3485,25 +3929,195 @@ int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt) || !HMAC_Final(hctx, macdata1, &hlen) || hlen > EVP_MAX_MD_SIZE || !WPACKET_allocate_bytes(pkt, hlen, &macdata2) - || macdata1 != macdata2 - || !WPACKET_close(pkt) - || (SSL_IS_TLS13(s) - && !tls_construct_extensions(s, pkt, - EXT_TLS1_3_NEW_SESSION_TICKET, - NULL, 0, &al))) { - SSLerr(SSL_F_TLS_CONSTRUCT_NEW_SESSION_TICKET, ERR_R_INTERNAL_ERROR); + || macdata1 != macdata2) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_CONSTRUCT_STATELESS_TICKET, ERR_R_INTERNAL_ERROR); goto err; } - EVP_CIPHER_CTX_free(ctx); - HMAC_CTX_free(hctx); - OPENSSL_free(senc); - return 1; + /* Close the sub-packet created by create_ticket_prequel() */ + if (!WPACKET_close(pkt)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATELESS_TICKET, + ERR_R_INTERNAL_ERROR); + goto err; + } + + ok = 1; err: OPENSSL_free(senc); EVP_CIPHER_CTX_free(ctx); HMAC_CTX_free(hctx); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); + return ok; +} + +static int construct_stateful_ticket(SSL *s, WPACKET *pkt, uint32_t age_add, + unsigned char *tick_nonce) +{ + if (!create_ticket_prequel(s, pkt, age_add, tick_nonce)) { + /* SSLfatal() already called */ + return 0; + } + + if (!WPACKET_memcpy(pkt, s->session->session_id, + s->session->session_id_length) + || !WPACKET_close(pkt)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_CONSTRUCT_STATEFUL_TICKET, + ERR_R_INTERNAL_ERROR); + return 0; + } + + return 1; +} + +int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt) +{ + SSL_CTX *tctx = s->session_ctx; + unsigned char tick_nonce[TICKET_NONCE_SIZE]; + union { + unsigned char age_add_c[sizeof(uint32_t)]; + uint32_t age_add; + } age_add_u; + + age_add_u.age_add = 0; + + if (SSL_IS_TLS13(s)) { + size_t i, hashlen; + uint64_t nonce; + static const unsigned char nonce_label[] = "resumption"; + const EVP_MD *md = ssl_handshake_md(s); + void (*cb) (const SSL *ssl, int type, int val) = NULL; + int hashleni = EVP_MD_size(md); + + /* Ensure cast to size_t is safe */ + if (!ossl_assert(hashleni >= 0)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_NEW_SESSION_TICKET, + ERR_R_INTERNAL_ERROR); + goto err; + } + hashlen = (size_t)hashleni; + + if (s->info_callback != NULL) + cb = s->info_callback; + else if (s->ctx->info_callback != NULL) + cb = s->ctx->info_callback; + + if (cb != NULL) { + /* + * We don't start and stop the handshake in between each ticket when + * sending more than one - but it should appear that way to the info + * callback. + */ + if (s->sent_tickets != 0) { + ossl_statem_set_in_init(s, 0); + cb(s, SSL_CB_HANDSHAKE_DONE, 1); + ossl_statem_set_in_init(s, 1); + } + cb(s, SSL_CB_HANDSHAKE_START, 1); + } + /* + * If we already sent one NewSessionTicket, or we resumed then + * s->session may already be in a cache and so we must not modify it. + * Instead we need to take a copy of it and modify that. + */ + if (s->sent_tickets != 0 || s->hit) { + SSL_SESSION *new_sess = ssl_session_dup(s->session, 0); + + if (new_sess == NULL) { + /* SSLfatal already called */ + goto err; + } + + SSL_SESSION_free(s->session); + s->session = new_sess; + } + + if (!ssl_generate_session_id(s, s->session)) { + /* SSLfatal() already called */ + goto err; + } + if (RAND_bytes(age_add_u.age_add_c, sizeof(age_add_u)) <= 0) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_NEW_SESSION_TICKET, + ERR_R_INTERNAL_ERROR); + goto err; + } + s->session->ext.tick_age_add = age_add_u.age_add; + + nonce = s->next_ticket_nonce; + for (i = TICKET_NONCE_SIZE; i > 0; i--) { + tick_nonce[i - 1] = (unsigned char)(nonce & 0xff); + nonce >>= 8; + } + + if (!tls13_hkdf_expand(s, md, s->resumption_master_secret, + nonce_label, + sizeof(nonce_label) - 1, + tick_nonce, + TICKET_NONCE_SIZE, + s->session->master_key, + hashlen)) { + /* SSLfatal() already called */ + goto err; + } + s->session->master_key_length = hashlen; + + s->session->time = (long)time(NULL); + if (s->s3->alpn_selected != NULL) { + OPENSSL_free(s->session->ext.alpn_selected); + s->session->ext.alpn_selected = + OPENSSL_memdup(s->s3->alpn_selected, s->s3->alpn_selected_len); + if (s->session->ext.alpn_selected == NULL) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_NEW_SESSION_TICKET, + ERR_R_MALLOC_FAILURE); + goto err; + } + s->session->ext.alpn_selected_len = s->s3->alpn_selected_len; + } + s->session->ext.max_early_data = s->max_early_data; + } + + if (tctx->generate_ticket_cb != NULL && + tctx->generate_ticket_cb(s, tctx->ticket_cb_data) == 0) + goto err; + + /* + * If we are using anti-replay protection then we behave as if + * SSL_OP_NO_TICKET is set - we are caching tickets anyway so there + * is no point in using full stateless tickets. + */ + if (((s->options & SSL_OP_NO_TICKET) != 0 || s->max_early_data > 0) + && SSL_IS_TLS13(s)) { + if (!construct_stateful_ticket(s, pkt, age_add_u.age_add, tick_nonce)) { + /* SSLfatal() already called */ + goto err; + } + } else if (!construct_stateless_ticket(s, pkt, age_add_u.age_add, + tick_nonce)) { + /* SSLfatal() already called */ + goto err; + } + + if (SSL_IS_TLS13(s)) { + if (!tls_construct_extensions(s, pkt, + SSL_EXT_TLS1_3_NEW_SESSION_TICKET, + NULL, 0)) { + /* SSLfatal() already called */ + goto err; + } + /* + * Increment both |sent_tickets| and |next_ticket_nonce|. |sent_tickets| + * gets reset to 0 if we send more tickets following a post-handshake + * auth, but |next_ticket_nonce| does not. + */ + s->sent_tickets++; + s->next_ticket_nonce++; + ssl_update_cache(s, SSL_SESS_CACHE_SERVER); + } + + return 1; + err: return 0; } @@ -3516,7 +4130,8 @@ int tls_construct_cert_status_body(SSL *s, WPACKET *pkt) if (!WPACKET_put_bytes_u8(pkt, s->ext.status_type) || !WPACKET_sub_memcpy_u24(pkt, s->ext.ocsp.resp, s->ext.ocsp.resp_len)) { - SSLerr(SSL_F_TLS_CONSTRUCT_CERT_STATUS_BODY, ERR_R_INTERNAL_ERROR); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CERT_STATUS_BODY, + ERR_R_INTERNAL_ERROR); return 0; } @@ -3526,7 +4141,7 @@ int tls_construct_cert_status_body(SSL *s, WPACKET *pkt) int tls_construct_cert_status(SSL *s, WPACKET *pkt) { if (!tls_construct_cert_status_body(s, pkt)) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); + /* SSLfatal() already called */ return 0; } @@ -3553,59 +4168,67 @@ MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt) if (!PACKET_get_length_prefixed_1(pkt, &next_proto) || !PACKET_get_length_prefixed_1(pkt, &padding) || PACKET_remaining(pkt) > 0) { - SSLerr(SSL_F_TLS_PROCESS_NEXT_PROTO, SSL_R_LENGTH_MISMATCH); - goto err; + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_NEXT_PROTO, + SSL_R_LENGTH_MISMATCH); + return MSG_PROCESS_ERROR; } if (!PACKET_memdup(&next_proto, &s->ext.npn, &next_proto_len)) { s->ext.npn_len = 0; - goto err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_NEXT_PROTO, + ERR_R_INTERNAL_ERROR); + return MSG_PROCESS_ERROR; } s->ext.npn_len = (unsigned char)next_proto_len; return MSG_PROCESS_CONTINUE_READING; - err: - ossl_statem_set_error(s); - return MSG_PROCESS_ERROR; } #endif static int tls_construct_encrypted_extensions(SSL *s, WPACKET *pkt) { - int al; - - if (!tls_construct_extensions(s, pkt, EXT_TLS1_3_ENCRYPTED_EXTENSIONS, - NULL, 0, &al)) { - ssl3_send_alert(s, SSL3_AL_FATAL, al); - SSLerr(SSL_F_TLS_CONSTRUCT_ENCRYPTED_EXTENSIONS, ERR_R_INTERNAL_ERROR); - ssl3_send_alert(s, SSL3_AL_FATAL, al); + if (!tls_construct_extensions(s, pkt, SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS, + NULL, 0)) { + /* SSLfatal() already called */ return 0; } return 1; } -static int tls_construct_hello_retry_request(SSL *s, WPACKET *pkt) +MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt) { - int al = SSL_AD_INTERNAL_ERROR; + if (PACKET_remaining(pkt) != 0) { + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, + SSL_R_LENGTH_MISMATCH); + return MSG_PROCESS_ERROR; + } + + if (s->early_data_state != SSL_EARLY_DATA_READING + && s->early_data_state != SSL_EARLY_DATA_READ_RETRY) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, + ERR_R_INTERNAL_ERROR); + return MSG_PROCESS_ERROR; + } /* - * TODO(TLS1.3): Remove the DRAFT version before release - * (should be s->version) + * EndOfEarlyData signals a key change so the end of the message must be on + * a record boundary. */ - if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT) - || !tls_construct_extensions(s, pkt, EXT_TLS1_3_HELLO_RETRY_REQUEST, - NULL, 0, &al)) { - SSLerr(SSL_F_TLS_CONSTRUCT_HELLO_RETRY_REQUEST, ERR_R_INTERNAL_ERROR); - ssl3_send_alert(s, SSL3_AL_FATAL, al); - return 0; + if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { + SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, + SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, + SSL_R_NOT_ON_RECORD_BOUNDARY); + return MSG_PROCESS_ERROR; } - /* Ditch the session. We'll create a new one next time around */ - SSL_SESSION_free(s->session); - s->session = NULL; - s->hit = 0; + s->early_data_state = SSL_EARLY_DATA_FINISHED_READING; + if (!s->method->ssl3_enc->change_cipher_state(s, + SSL3_CC_HANDSHAKE | SSL3_CHANGE_CIPHER_SERVER_READ)) { + /* SSLfatal() already called */ + return MSG_PROCESS_ERROR; + } - return 1; + return MSG_PROCESS_CONTINUE_READING; }