X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fstatem%2Fstatem_srvr.c;h=4a18ad416d340ddced44148d2107ded6f5496095;hp=53b8ef943184d186cbb811f2de35b74d5619bcdb;hb=8f21260b09eca6226255763e1856c12fbc71985c;hpb=0de6d66d36dc5f6d46247c63da71b73d7e8e018c diff --git a/ssl/statem/statem_srvr.c b/ssl/statem/statem_srvr.c index 53b8ef9431..4a18ad416d 100644 --- a/ssl/statem/statem_srvr.c +++ b/ssl/statem/statem_srvr.c @@ -1,56 +1,19 @@ /* - * 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 + * Licensed under the Apache License 2.0 (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * 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 "../ssl_local.h" +#include "statem_local.h" +#include "internal/constant_time.h" +#include "internal/cryptlib.h" #include #include #include @@ -60,9 +23,27 @@ #include #include #include +#include +#include +#include + +#define TICKET_NONCE_SIZE 8 + +typedef struct { + ASN1_TYPE *kxBlob; + ASN1_TYPE *opaqueBlob; +} GOST_KX_MESSAGE; + +DECLARE_ASN1_FUNCTIONS(GOST_KX_MESSAGE) + +ASN1_SEQUENCE(GOST_KX_MESSAGE) = { + ASN1_SIMPLE(GOST_KX_MESSAGE, kxBlob, ASN1_ANY), + ASN1_OPT(GOST_KX_MESSAGE, opaqueBlob, ASN1_ANY), +} ASN1_SEQUENCE_END(GOST_KX_MESSAGE) + +IMPLEMENT_ASN1_FUNCTIONS(GOST_KX_MESSAGE) 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 @@ -86,15 +67,14 @@ 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; - } - break; - case TLS_ST_EARLY_DATA: - if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) { + 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; @@ -105,7 +85,7 @@ static int ossl_statem_server13_read_transition(SSL *s, int mt) case TLS_ST_SR_END_OF_EARLY_DATA: case TLS_ST_SW_FINISHED: - if (s->s3->tmp.cert_request) { + if (s->s3.tmp.cert_request) { if (mt == SSL3_MT_CERTIFICATE) { st->hand_state = TLS_ST_SR_CERT; return 1; @@ -146,6 +126,13 @@ static int ossl_statem_server13_read_transition(SSL *s, int mt) */ 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; @@ -201,7 +188,7 @@ int ossl_statem_server_read_transition(SSL *s, int mt) * list if we requested a certificate) */ if (mt == SSL3_MT_CLIENT_KEY_EXCHANGE) { - if (s->s3->tmp.cert_request) { + if (s->s3.tmp.cert_request) { if (s->version == SSL3_VERSION) { if ((s->verify_mode & SSL_VERIFY_PEER) && (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) { @@ -210,10 +197,9 @@ 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; @@ -223,7 +209,7 @@ int ossl_statem_server_read_transition(SSL *s, int mt) st->hand_state = TLS_ST_SR_KEY_EXCH; return 1; } - } else if (s->s3->tmp.cert_request) { + } else if (s->s3.tmp.cert_request) { if (mt == SSL3_MT_CERTIFICATE) { st->hand_state = TLS_ST_SR_CERT; return 1; @@ -275,7 +261,7 @@ int ossl_statem_server_read_transition(SSL *s, int mt) case TLS_ST_SR_CHANGE: #ifndef OPENSSL_NO_NEXTPROTONEG - if (s->s3->npn_seen) { + if (s->s3.npn_seen) { if (mt == SSL3_MT_NEXT_PROTO) { st->hand_state = TLS_ST_SR_NEXT_PROTO; return 1; @@ -310,8 +296,23 @@ 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; } @@ -324,7 +325,7 @@ int ossl_statem_server_read_transition(SSL *s, int mt) */ static int send_server_key_exchange(SSL *s) { - unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; + unsigned long alg_k = s->s3.tmp.new_cipher->algorithm_mkey; /* * only send a ServerKeyExchange if DH or fortezza but we have a @@ -364,23 +365,29 @@ 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 * section "Certificate request" in SSL 3 drafts and in * RFC 2246): */ - && (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) + && (!(s->s3.tmp.new_cipher->algorithm_auth & SSL_aNULL) /* * ... except when the application insists on * verification (against the specs, but statem_clnt.c accepts @@ -388,12 +395,12 @@ static int send_certificate_request(SSL *s) */ || (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) /* don't request certificate for SRP auth */ - && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aSRP) + && !(s->s3.tmp.new_cipher->algorithm_auth & SSL_aSRP) /* * With normal PSK Certificates and Certificate Requests * are omitted */ - && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aPSK)) { + && !(s->s3.tmp.new_cipher->algorithm_auth & SSL_aPSK)) { return 1; } @@ -417,6 +424,9 @@ 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: @@ -424,21 +434,32 @@ 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: @@ -452,7 +473,12 @@ 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: @@ -473,26 +499,40 @@ static WRITE_TRAN ossl_statem_server13_write_transition(SSL *s) 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; - return WRITE_TRAN_CONTINUE; - - case TLS_ST_SR_KEY_UPDATE: - if (s->key_update != SSL_KEY_UPDATE_NONE) { - st->hand_state = TLS_ST_SW_KEY_UPDATE; + 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; } - /* Fall through */ + 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: case TLS_ST_SW_KEY_UPDATE: - case TLS_ST_SW_SESSION_TICKET: st->hand_state = TLS_ST_OK; 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; } } @@ -515,6 +555,9 @@ 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: @@ -526,7 +569,7 @@ 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 */ @@ -541,10 +584,15 @@ WRITE_TRAN ossl_statem_server_write_transition(SSL *s) 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: @@ -559,7 +607,7 @@ WRITE_TRAN ossl_statem_server_write_transition(SSL *s) } else { /* Check if it is anon DH or anon ECDH, */ /* normal PSK or SRP */ - if (!(s->s3->tmp.new_cipher->algorithm_auth & + if (!(s->s3.tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { st->hand_state = TLS_ST_SW_CERT; } else if (send_server_key_exchange(s)) { @@ -668,19 +716,23 @@ 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 @@ -691,9 +743,11 @@ WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst) break; case TLS_ST_SW_CHANGE: - s->session->cipher = s->s3->tmp.new_cipher; + 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)) { @@ -708,17 +762,39 @@ 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) + 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; } +static ossl_inline int conn_is_closed(void) +{ + switch (get_last_sys_error()) { +#if defined(EPIPE) + case EPIPE: + return 1; +#endif +#if defined(ECONNRESET) + case ECONNRESET: + return 1; +#endif +#if defined(WSAECONNRESET) + case WSAECONNRESET: + return 1; +#endif + default: + return 0; + } +} + /* * Perform any work that needs to be done after sending a message from the * server to the client. @@ -734,16 +810,11 @@ 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; @@ -753,7 +824,7 @@ 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; } /* @@ -764,10 +835,17 @@ 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]; char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; + size_t labellen; /* * Add new shared key for SCTP-Auth, will be ignored if no @@ -776,11 +854,18 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, sizeof(DTLS1_SCTP_AUTH_LABEL)); + /* Don't include the terminating zero. */ + labellen = sizeof(labelbuffer) - 1; + if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) + labellen += 1; + if (SSL_export_keying_material(s, sctpauthkey, sizeof(sctpauthkey), labelbuffer, - sizeof(labelbuffer), NULL, 0, + labellen, 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; } @@ -788,26 +873,42 @@ WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst) sizeof(sctpauthkey), sctpauthkey); } #endif - /* - * 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 - * alert, or an encrypted handshake message. We're going to need - * something clever in the record layer for this. - */ + 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; + } + 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)) + 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)) + SSL3_CC_HANDSHAKE |SSL3_CHANGE_CIPHER_SERVER_READ)) { + /* SSLfatal() already called */ return WORK_ERROR; + } + /* + * We don't yet know whether the next record we are going to receive + * is an unencrypted alert, an encrypted alert, or an encrypted + * handshake message. We temporarily tolerate unencrypted alerts. + */ + s->statem.enc_read_state = ENC_READ_STATE_ALLOW_PLAIN_ALERTS; + break; } - break; - case TLS_ST_SW_CHANGE: #ifndef OPENSSL_NO_SCTP if (SSL_IS_DTLS(s) && !s->hit) { /* @@ -821,7 +922,7 @@ 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; } @@ -853,20 +954,45 @@ 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: - if (SSL_IS_TLS13(s) && statem_flush(s) != 1) + clear_sys_error(); + if (SSL_IS_TLS13(s) && statem_flush(s) != 1) { + if (SSL_get_error(s, 0) == SSL_ERROR_SYSCALL + && conn_is_closed()) { + /* + * We ignore connection closed errors in TLSv1.3 when sending a + * NewSessionTicket and behave as if we were successful. This is + * so that we are still able to read data sent to us by a client + * that closes soon after the end of the handshake without + * waiting to read our post-handshake NewSessionTickets. + */ + s->rwstate = SSL_NOTHING; + break; + } + return WORK_MORE_A; + } break; } @@ -889,6 +1015,9 @@ 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: @@ -966,11 +1095,6 @@ int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt, *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; @@ -1054,6 +1178,9 @@ 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: @@ -1099,6 +1226,9 @@ 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: @@ -1107,30 +1237,40 @@ 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); } - 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) && + if ((s->s3.tmp.new_cipher->algorithm_mkey & SSL_kSRP) && (s->srp_ctx.TLS_ext_srp_username_callback != NULL)) { if (s->srp_ctx.login == NULL) { /* * 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 @@ -1152,15 +1292,16 @@ 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; } @@ -1226,34 +1367,43 @@ static void ssl_check_for_safari(SSL *s, const CLIENTHELLO_MSG *hello) ext_len = TLS1_get_client_version(s) >= TLS1_2_VERSION ? sizeof(kSafariExtensionsBlock) : kSafariCommonExtensionsLength; - s->s3->is_probably_safari = PACKET_equal(&tmppkt, kSafariExtensionsBlock, + s->s3.is_probably_safari = PACKET_equal(&tmppkt, kSafariExtensionsBlock, ext_len); } #endif /* !OPENSSL_NO_EC */ 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 ((s->options & SSL_OP_NO_RENEGOTIATION)) { - ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION); + 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; } + 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. */ @@ -1263,10 +1413,11 @@ 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_UNEXPECTED_MESSAGE; - 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; } /*- @@ -1291,14 +1442,15 @@ 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; } @@ -1315,16 +1467,15 @@ 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_ILLEGAL_PARAMETER; - 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, @@ -1333,10 +1484,9 @@ 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; @@ -1353,9 +1503,9 @@ 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); @@ -1366,23 +1516,23 @@ 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_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); - 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, @@ -1390,21 +1540,23 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) * So check cookie length... */ if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) { - if (clienthello->dtls_cookie_len == 0) - return 1; + if (clienthello->dtls_cookie_len == 0) { + OPENSSL_free(clienthello); + 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. */ @@ -1413,9 +1565,9 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) } else { if (!PACKET_get_length_prefixed_2(pkt, &clienthello->extensions) || PACKET_remaining(pkt) != 0) { - 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; } } } @@ -1423,27 +1575,24 @@ 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_INTERNAL_ERROR; - SSLerr(SSL_F_TLS_PROCESS_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); - 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, SSL_EXT_CLIENT_HELLO, - &clienthello->pre_proc_exts, &al, + &clienthello->pre_proc_exts, &clienthello->pre_proc_exts_len, 1)) { - /* SSLerr already been called */ - goto f_err; + /* 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); + err: if (clienthello != NULL) OPENSSL_free(clienthello->pre_proc_exts); OPENSSL_free(clienthello); @@ -1451,7 +1600,7 @@ MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt) return MSG_PROCESS_ERROR; } -static int tls_early_post_process_client_hello(SSL *s, int *pal) +static int tls_early_post_process_client_hello(SSL *s) { unsigned int j; int i, al = SSL_AD_INTERNAL_ERROR; @@ -1468,21 +1617,26 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) DOWNGRADE dgrd = DOWNGRADE_NONE; /* 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; } } /* Set up the client_random */ - memcpy(s->s3->client_random, clienthello->random, SSL3_RANDOM_SIZE); + memcpy(s->s3.client_random, clienthello->random, SSL3_RANDOM_SIZE); /* Choose the version */ @@ -1491,10 +1645,12 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) || (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 */ @@ -1514,20 +1670,20 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) } 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)) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_NOT_ON_RECORD_BOUNDARY); + SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_NOT_ON_RECORD_BOUNDARY); goto err; } @@ -1537,9 +1693,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) 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 */ } @@ -1547,8 +1703,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) } 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; @@ -1556,9 +1713,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) if (s->method->version == DTLS_ANY_VERSION) { 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; } } @@ -1567,13 +1724,14 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) s->hit = 0; if (!ssl_cache_cipherlist(s, &clienthello->ciphersuites, - clienthello->isv2, &al) || + clienthello->isv2) || !bytes_to_cipher_list(s, &clienthello->ciphersuites, &ciphers, &scsvs, - clienthello->isv2, &al)) { + clienthello->isv2, 1)) { + /* SSLfatal() already called */ goto err; } - s->s3->send_connection_binding = 0; + 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++) { @@ -1581,12 +1739,12 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) 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; + 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; + s->s3.send_connection_binding = 1; } else if (SSL_CIPHER_get_id(c) == SSL3_CK_FALLBACK_SCSV && !ssl_check_version_downgrade(s)) { /* @@ -1596,9 +1754,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) * 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; + SSLfatal(s, SSL_AD_INAPPROPRIATE_FALLBACK, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_INAPPROPRIATE_FALLBACK); goto err; } } @@ -1610,29 +1768,31 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) ssl3_choose_cipher(s, ciphers, SSL_get_ciphers(s)); if (cipher == NULL) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_NO_SHARED_CIPHER); - al = SSL_AD_HANDSHAKE_FAILURE; + 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 && s->s3->tmp.new_cipher != NULL - && s->s3->tmp.new_cipher->id != cipher->id) { + 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. */ - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_BAD_CIPHER); + 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; + 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, SSL_EXT_CLIENT_HELLO, - clienthello->pre_proc_exts, NULL, 0, &al)) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); + clienthello->pre_proc_exts, NULL, 0)) { + /* SSLfatal() already called */ goto err; } @@ -1655,22 +1815,33 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) 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_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. In TLSv1.3 we check * ciphersuite compatibility with the session as part of resumption. @@ -1679,15 +1850,15 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) j = 0; id = s->session->cipher->id; -#ifdef CIPHER_DEBUG - fprintf(stderr, "client sent %d ciphers\n", sk_SSL_CIPHER_num(ciphers)); -#endif + OSSL_TRACE_BEGIN(TLS_CIPHER) { + BIO_printf(trc_out, "client sent %d ciphers\n", + sk_SSL_CIPHER_num(ciphers)); + } for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) { c = sk_SSL_CIPHER_value(ciphers, i); -#ifdef CIPHER_DEBUG - fprintf(stderr, "client [%2d of %2d]:%s\n", - i, sk_SSL_CIPHER_num(ciphers), SSL_CIPHER_get_name(c)); -#endif + if (trc_out != NULL) + BIO_printf(trc_out, "client [%2d of %2d]:%s\n", i, + sk_SSL_CIPHER_num(ciphers), SSL_CIPHER_get_name(c)); if (c->id == id) { j = 1; break; @@ -1698,11 +1869,13 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) * 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); + OSSL_TRACE_CANCEL(TLS_CIPHER); goto err; } + OSSL_TRACE_END(TLS_CIPHER); } for (loop = 0; loop < clienthello->compressions_len; loop++) { @@ -1712,8 +1885,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) 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; } @@ -1724,8 +1898,8 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) /* TLS extensions */ if (!tls_parse_all_extensions(s, SSL_EXT_CLIENT_HELLO, - clienthello->pre_proc_exts, NULL, 0, &al, 1)) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_PARSE_TLSEXT); + clienthello->pre_proc_exts, NULL, 0, 1)) { + /* SSLfatal() already called */ goto err; } @@ -1737,8 +1911,11 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) */ { unsigned char *pos; - pos = s->s3->server_random; + pos = s->s3.server_random; 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; } } @@ -1763,26 +1940,27 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) && master_key_length > 0) { s->session->master_key_length = master_key_length; s->hit = 1; - s->session->ciphers = ciphers; + s->peer_ciphers = ciphers; s->session->verify_result = X509_V_OK; ciphers = NULL; /* check if some cipher was preferred by call back */ if (pref_cipher == NULL) - pref_cipher = ssl3_choose_cipher(s, s->session->ciphers, + pref_cipher = ssl3_choose_cipher(s, s->peer_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; } s->session->cipher = pref_cipher; sk_SSL_CIPHER_free(s->cipher_list); - s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers); + s->cipher_list = sk_SSL_CIPHER_dup(s->peer_ciphers); sk_SSL_CIPHER_free(s->cipher_list_by_id); - s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers); + s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->peer_ciphers); } } @@ -1791,7 +1969,7 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) * options, we will now look for them. We have complen-1 compression * algorithms from the client, starting at q. */ - s->s3->tmp.new_compression = NULL; + s->s3.tmp.new_compression = NULL; if (SSL_IS_TLS13(s)) { /* * We already checked above that the NULL compression method appears in @@ -1799,9 +1977,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) * a TLSv1.3 ClientHello. */ if (clienthello->compressions_len != 1) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_INVALID_COMPRESSION_ALGORITHM); + SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, + SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, + SSL_R_INVALID_COMPRESSION_ALGORITHM); goto err; } } @@ -1813,21 +1991,23 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) /* 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 */ for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++) { comp = sk_SSL_COMP_value(s->ctx->comp_methods, m); if (comp_id == comp->id) { - s->s3->tmp.new_compression = comp; + s->s3.tmp.new_compression = comp; break; } } - if (s->s3->tmp.new_compression == NULL) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, - SSL_R_INVALID_COMPRESSION_ALGORITHM); + if (s->s3.tmp.new_compression == NULL) { + 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 */ @@ -1836,9 +2016,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) 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) { @@ -1862,7 +2042,7 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) break; } if (done) - s->s3->tmp.new_compression = comp; + s->s3.tmp.new_compression = comp; else comp = NULL; } @@ -1872,21 +2052,24 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) * 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 /* - * Given s->session->ciphers and SSL_get_ciphers, we must pick a cipher + * Given s->peer_ciphers and SSL_get_ciphers, we must pick a cipher */ if (!s->hit || SSL_IS_TLS13(s)) { - sk_SSL_CIPHER_free(s->session->ciphers); - s->session->ciphers = ciphers; + sk_SSL_CIPHER_free(s->peer_ciphers); + s->peer_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; @@ -1899,7 +2082,7 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) s->session->compress_meth = (comp == NULL) ? 0 : comp->id; #endif if (!tls1_set_server_sigalgs(s)) { - SSLerr(SSL_F_TLS_EARLY_POST_PROCESS_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); + /* SSLfatal() already called */ goto err; } } @@ -1911,9 +2094,6 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) s->clienthello = NULL; return 1; err: - ossl_statem_set_error(s); - *pal = al; - sk_SSL_CIPHER_free(ciphers); sk_SSL_CIPHER_free(scsvs); OPENSSL_free(clienthello->pre_proc_exts); @@ -1925,9 +2105,9 @@ static int tls_early_post_process_client_hello(SSL *s, int *pal) /* * 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; @@ -1942,12 +2122,12 @@ static int tls_handle_status_request(SSL *s, int *al) int ret; /* If no certificate can't return certificate status */ - if (s->s3->tmp.cert != NULL) { + if (s->s3.tmp.cert != NULL) { /* * Set current certificate to one we will use so SSL_get_certificate * et al can pick it up. */ - s->cert->key = s->s3->tmp.cert; + s->cert->key = s->s3.tmp.cert; ret = s->ctx->ext.status_cb(s, s->ctx->ext.status_arg); switch (ret) { /* We don't want to send a status request response */ @@ -1962,10 +2142,94 @@ 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; @@ -1973,14 +2237,13 @@ 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; @@ -1992,10 +2255,10 @@ WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst) 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; @@ -2007,31 +2270,34 @@ WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst) /* 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)); + ssl3_choose_cipher(s, s->peer_ciphers, SSL_get_ciphers(s)); if (cipher == NULL) { - SSLerr(SSL_F_TLS_POST_PROCESS_CLIENT_HELLO, - SSL_R_NO_SHARED_CIPHER); - goto f_err; + 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; + s->s3.tmp.new_cipher = cipher; } if (!s->hit) { - if (!tls_choose_sigalg(s, &al)) - goto f_err; + 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, ((cipher->algorithm_mkey - & (SSL_kDHE | SSL_kECDHE)) - != 0)); + 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; } } else { /* Session-id reuse */ - s->s3->tmp.new_cipher = s->session->cipher; + s->s3.tmp.new_cipher = s->session->cipher; } /*- @@ -2043,17 +2309,26 @@ WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst) * ssl version is set - sslv3 * s->session - The ssl session has been setup. * s->hit - session reuse flag - * s->s3->tmp.new_cipher- the new cipher to use. + * s->s3.tmp.new_cipher - the new cipher to use. */ /* * 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; @@ -2061,52 +2336,46 @@ 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; } /*- @@ -2121,6 +2390,8 @@ 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. @@ -2130,53 +2401,77 @@ 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; + compm = s->s3.tmp.new_compression->id; #endif - if ((!SSL_IS_TLS13(s) - && !WPACKET_sub_memcpy_u8(pkt, s->session->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)) - || !tls_construct_extensions(s, pkt, - SSL_IS_TLS13(s) - ? SSL_EXT_TLS1_3_SERVER_HELLO - : SSL_EXT_TLS1_2_SERVER_HELLO, - NULL, 0, &al)) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_HELLO, ERR_R_INTERNAL_ERROR); - goto err; + if (!WPACKET_sub_memcpy_u8(pkt, session_id, sl) + || !s->method->put_cipher_by_char(s->s3.tmp.new_cipher, pkt, &len) + || !WPACKET_put_bytes_u8(pkt, compm)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_SERVER_HELLO, + ERR_R_INTERNAL_ERROR); + return 0; } - if (!(s->verify_mode & SSL_VERIFY_PEER) - && !ssl3_digest_cached_records(s, 0)) { - al = SSL_AD_INTERNAL_ERROR; - goto err; + if (!tls_construct_extensions(s, pkt, + 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->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 (!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; } } @@ -2193,8 +2488,8 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) size_t encodedlen = 0; int curve_id = 0; #endif - const SIGALG_LOOKUP *lu = s->s3->tmp.sigalg; - int al = SSL_AD_INTERNAL_ERROR, i; + const SIGALG_LOOKUP *lu = s->s3.tmp.sigalg; + int i; unsigned long type; const BIGNUM *r[4]; EVP_MD_CTX *md_ctx = EVP_MD_CTX_new(); @@ -2202,16 +2497,18 @@ 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; + type = s->s3.tmp.new_cipher->algorithm_mkey; r[0] = r[1] = r[2] = r[3] = NULL; #ifndef OPENSSL_NO_PSK @@ -2231,9 +2528,10 @@ 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; @@ -2244,39 +2542,46 @@ 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_INTERNAL_ERROR; - 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); + if (s->s3.tmp.pkey != NULL) { + 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); + s->s3.tmp.pkey = ssl_generate_pkey(pkdhp); + if (s->s3.tmp.pkey == NULL) { + /* SSLfatal() already called */ goto err; } - dh = EVP_PKEY_get0_DH(s->s3->tmp.pkey); + 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; @@ -2287,34 +2592,35 @@ 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); + if (s->s3.tmp.pkey != NULL) { + 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; + if (s->s3.tmp.pkey == NULL) { + /* SSLfatal() already called */ + goto err; } /* Encode the public key. */ - encodedlen = EVP_PKEY_get1_tls_encodedpoint(s->s3->tmp.pkey, + 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; } @@ -2333,8 +2639,9 @@ 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; @@ -2344,18 +2651,19 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) } else #endif { - al = SSL_AD_INTERNAL_ERROR; - 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) { + 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 @@ -2370,9 +2678,10 @@ 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 @@ -2389,9 +2698,10 @@ 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 @@ -2405,9 +2715,10 @@ 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); } @@ -2415,9 +2726,10 @@ 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); @@ -2435,9 +2747,10 @@ 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; @@ -2446,73 +2759,72 @@ 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; + EVP_PKEY *pkey = s->s3.tmp.cert->privatekey; + const EVP_MD *md; + unsigned char *sigbytes1, *sigbytes2, *tbs; + size_t siglen = 0, tbslen; - 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; - /* - * 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 - * up front, and then properly allocate them in the WPACKET - * afterwards. - */ - 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; + 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; + } + + if (EVP_DigestSignInit(md_ctx, &pctx, md, NULL, pkey) <= 0) { + 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) - || sigbytes1 != sigbytes2) { - SSLerr(SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto f_err; + tbslen = construct_key_exchange_tbs(s, &tbs, + s->init_buf->data + paramoffset, + paramlen); + if (tbslen == 0) { + /* SSLfatal() already called */ + goto err; + } + + if (EVP_DigestSign(md_ctx, NULL, &siglen, tbs, tbslen) <=0 + || !WPACKET_sub_reserve_bytes_u16(pkt, siglen, &sigbytes1) + || EVP_DigestSign(md_ctx, sigbytes1, &siglen, tbs, tbslen) <= 0 + || !WPACKET_sub_allocate_bytes_u16(pkt, siglen, &sigbytes2) + || sigbytes1 != sigbytes2) { + OPENSSL_free(tbs); + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_SERVER_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; } + OPENSSL_free(tbs); } 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); @@ -2526,22 +2838,39 @@ int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt) int tls_construct_certificate_request(SSL *s, WPACKET *pkt) { - int al = SSL_AD_INTERNAL_ERROR; - if (SSL_IS_TLS13(s)) { - /* TODO(TLS1.3) for now send empty request context */ - if (!WPACKET_put_bytes_u8(pkt, 0)) { - SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, - ERR_R_INTERNAL_ERROR); - goto err; + /* 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_ex(s->ctx->libctx, 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, &al)) { - SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, - ERR_R_INTERNAL_ERROR); - goto err; + 0)) { + /* SSLfatal() already called */ + return 0; } goto done; } @@ -2549,8 +2878,9 @@ int tls_construct_certificate_request(SSL *s, WPACKET *pkt) /* 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; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); + return 0; } if (SSL_USE_SIGALGS(s)) { @@ -2561,26 +2891,25 @@ int tls_construct_certificate_request(SSL *s, WPACKET *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; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, + ERR_R_INTERNAL_ERROR); + return 0; } } - if (!construct_ca_names(s, pkt)) { - SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); - goto err; + if (!construct_ca_names(s, get_ca_names(s), pkt)) { + /* SSLfatal() already called */ + return 0; } done: - s->s3->tmp.cert_request = 1; + s->certreqs_sent++; + s->s3.tmp.cert_request = 1; return 1; - err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - 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]; @@ -2588,24 +2917,24 @@ 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; } @@ -2613,56 +2942,55 @@ 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; } - OPENSSL_free(s->s3->tmp.psk); - s->s3->tmp.psk = OPENSSL_memdup(psk, psklen); + OPENSSL_free(s->s3.tmp.psk); + s->s3.tmp.psk = OPENSSL_memdup(psk, psklen); 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); + if (s->s3.tmp.psk == NULL) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_PROCESS_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE); return 0; } - s->s3->tmp.psklen = psklen; + s->s3.tmp.psklen = psklen; 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]; - int decrypt_len; - unsigned char decrypt_good, version_good; - size_t j, padding_len; + size_t outlen; PACKET enc_premaster; - RSA *rsa = NULL; + EVP_PKEY *rsa = NULL; unsigned char *rsa_decrypt = NULL; int ret = 0; + EVP_PKEY_CTX *ctx = NULL; + OSSL_PARAM params[3], *p = params; - rsa = EVP_PKEY_get0_RSA(s->cert->pkeys[SSL_PKEY_RSA].privatekey); + rsa = s->cert->pkeys[SSL_PKEY_RSA].privatekey; if (rsa == NULL) { - *al = SSL_AD_INTERNAL_ERROR; - 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; } @@ -2672,147 +3000,94 @@ 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; } } - /* - * We want to be sure that the plaintext buffer size makes it safe to - * iterate over the entire size of a premaster secret - * (SSL_MAX_MASTER_KEY_LENGTH). Reject overly short RSA keys because - * 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); + outlen = SSL_MAX_MASTER_KEY_LENGTH; + rsa_decrypt = OPENSSL_malloc(outlen); + if (rsa_decrypt == NULL) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + ERR_R_MALLOC_FAILURE); 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); - return 0; + ctx = EVP_PKEY_CTX_new(rsa, NULL); + if (ctx == NULL) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + ERR_R_MALLOC_FAILURE); + goto err; } /* * We must not leak whether a decryption failure occurs because of * Bleichenbacher's attack on PKCS #1 v1.5 RSA padding (see RFC 2246, - * section 7.4.7.1). The code follows that advice of the TLS RFC and - * generates a random premaster secret for the case that the decrypt - * fails. See https://tools.ietf.org/html/rfc5246#section-7.4.7.1 + * section 7.4.7.1). We use the special padding type + * RSA_PKCS1_WITH_TLS_PADDING to do that. It will automaticaly decrypt the + * RSA, check the padding and check that the client version is as expected + * in the premaster secret. If any of that fails then the function appears + * to return successfully but with a random result. The call below could + * still fail if the input is publicly invalid. + * See https://tools.ietf.org/html/rfc5246#section-7.4.7.1 */ - - if (RAND_bytes(rand_premaster_secret, sizeof(rand_premaster_secret)) <= 0) + if (EVP_PKEY_decrypt_init(ctx) <= 0 + || EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_PKCS1_WITH_TLS_PADDING) <= 0) { + SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + SSL_R_DECRYPTION_FAILED); goto err; - - /* - * Decrypt with no padding. PKCS#1 padding will be removed as part of - * the timing-sensitive code below. - */ - /* TODO(size_t): Convert this function */ - 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) - goto err; - - /* Check the padding. See RFC 3447, section 7.2.2. */ - - /* - * The smallest padded premaster is 11 bytes of overhead. Small keys - * are publicly invalid, so this may return immediately. This ensures - * 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); - goto err; - } - - padding_len = decrypt_len - SSL_MAX_MASTER_KEY_LENGTH; - decrypt_good = constant_time_eq_int_8(rsa_decrypt[0], 0) & - constant_time_eq_int_8(rsa_decrypt[1], 2); - for (j = 2; j < padding_len - 1; j++) { - decrypt_good &= ~constant_time_is_zero_8(rsa_decrypt[j]); } - decrypt_good &= constant_time_is_zero_8(rsa_decrypt[padding_len - 1]); - /* - * If the version in the decrypted pre-master secret is correct then - * version_good will be 0xff, otherwise it'll be zero. The - * Klima-Pokorny-Rosa extension of Bleichenbacher's attack - * (http://eprint.iacr.org/2003/052/) exploits the version number - * check as a "bad version oracle". Thus version checks are done in - * constant time and are treated like any other decryption error. - */ - version_good = - constant_time_eq_8(rsa_decrypt[padding_len], - (unsigned)(s->client_version >> 8)); - version_good &= - constant_time_eq_8(rsa_decrypt[padding_len + 1], - (unsigned)(s->client_version & 0xff)); - - /* - * The premaster secret must contain the same version number as the - * ClientHello to detect version rollback attacks (strangely, the - * protocol does not offer such protection for DH ciphersuites). - * However, buggy clients exist that send the negotiated protocol - * version instead if the server does not support the requested - * protocol version. If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such - * clients. - */ - if (s->options & SSL_OP_TLS_ROLLBACK_BUG) { - unsigned char workaround_good; - workaround_good = constant_time_eq_8(rsa_decrypt[padding_len], - (unsigned)(s->version >> 8)); - workaround_good &= - constant_time_eq_8(rsa_decrypt[padding_len + 1], - (unsigned)(s->version & 0xff)); - version_good |= workaround_good; + *p++ = OSSL_PARAM_construct_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, + (unsigned int *)&s->client_version); + if ((s->options & SSL_OP_TLS_ROLLBACK_BUG) != 0) + *p++ = OSSL_PARAM_construct_uint( + OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, + (unsigned int *)&s->version); + *p++ = OSSL_PARAM_construct_end(); + + if (!EVP_PKEY_CTX_set_params(ctx, params) + || EVP_PKEY_decrypt(ctx, rsa_decrypt, &outlen, + PACKET_data(&enc_premaster), + PACKET_remaining(&enc_premaster)) <= 0) { + SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + SSL_R_DECRYPTION_FAILED); + goto err; } /* - * Both decryption and version must be good for decrypt_good to - * remain non-zero (0xff). - */ - decrypt_good &= version_good; - - /* - * Now copy rand_premaster_secret over from p using - * decrypt_good_mask. If decryption failed, then p does not - * contain valid plaintext, however, a check above guarantees - * it is still sufficiently large to read from. + * This test should never fail (otherwise we should have failed above) but + * we double check anyway. */ - for (j = 0; j < sizeof(rand_premaster_secret); j++) { - rsa_decrypt[padding_len + j] = - constant_time_select_8(decrypt_good, - rsa_decrypt[padding_len + j], - rand_premaster_secret[j]); + if (outlen != SSL_MAX_MASTER_KEY_LENGTH) { + OPENSSL_cleanse(rsa_decrypt, SSL_MAX_MASTER_KEY_LENGTH); + SSLfatal(s, SSL_AD_DECRYPT_ERROR, SSL_F_TLS_PROCESS_CKE_RSA, + SSL_R_DECRYPTION_FAILED); + goto err; } - 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); + /* Also cleanses rsa_decrypt (on success or failure) */ + if (!ssl_generate_master_secret(s, rsa_decrypt, + SSL_MAX_MASTER_KEY_LENGTH, 0)) { + /* SSLfatal() already called */ goto err; } ret = 1; err: OPENSSL_free(rsa_decrypt); + EVP_PKEY_CTX_free(ctx); 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; @@ -2824,75 +3099,74 @@ 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_DECODE_ERROR; - 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; + skey = s->s3.tmp.pkey; if (skey == NULL) { - *al = SSL_AD_INTERNAL_ERROR; - 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_DECODE_ERROR; - 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); - if (pub_key != NULL) - BN_free(pub_key); + if (pub_key == NULL || cdh == NULL || !DH_set0_key(cdh, pub_key, NULL)) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_DHE, + ERR_R_INTERNAL_ERROR); + 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; } ret = 1; - EVP_PKEY_free(s->s3->tmp.pkey); - s->s3->tmp.pkey = NULL; + EVP_PKEY_free(s->s3.tmp.pkey); + s->s3.tmp.pkey = NULL; err: EVP_PKEY_free(ckey); 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; + EVP_PKEY *skey = s->s3.tmp.pkey; EVP_PKEY *ckey = NULL; int ret = 0; 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; @@ -2906,44 +3180,50 @@ 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; + } + if (skey == NULL) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_CKE_ECDHE, + SSL_R_MISSING_TMP_ECDH_KEY); 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_ILLEGAL_PARAMETER; - 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; } ret = 1; - EVP_PKEY_free(s->s3->tmp.pkey); - s->s3->tmp.pkey = NULL; + EVP_PKEY_free(s->s3.tmp.pkey); + s->s3.tmp.pkey = NULL; err: EVP_PKEY_free(ckey); 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; @@ -2951,42 +3231,43 @@ 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) { - *al = SSL_AD_INTERNAL_ERROR; - 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; @@ -2995,14 +3276,12 @@ 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; + GOST_KX_MESSAGE *pKX = NULL; + const unsigned char *ptr; int ret = 0; /* Get our certificate private key */ - alg_a = s->s3->tmp.new_cipher->algorithm_auth; + alg_a = s->s3.tmp.new_cipher->algorithm_auth; if (alg_a & SSL_aGOST12) { /* * New GOST ciphersuites have SSL_aGOST01 bit too @@ -3020,13 +3299,13 @@ 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; } /* @@ -3040,109 +3319,127 @@ static int tls_process_cke_gost(SSL *s, PACKET *pkt, int *al) if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0) 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); + + ptr = PACKET_data(pkt); + /* Some implementations provide extra data in the opaqueBlob + * We have nothing to do with this blob so we just skip it */ + pKX = d2i_GOST_KX_MESSAGE(NULL, &ptr, PACKET_remaining(pkt)); + if (pKX == NULL + || pKX->kxBlob == NULL + || ASN1_TYPE_get(pKX->kxBlob) != V_ASN1_SEQUENCE) { + SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PROCESS_CKE_GOST, + SSL_R_DECRYPTION_FAILED); + goto err; + } + + if (!PACKET_forward(pkt, ptr - PACKET_data(pkt))) { + SSLfatal(s, SSL_AD_INTERNAL_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 (PACKET_remaining(pkt) != 0) { + SSLfatal(s, SSL_AD_INTERNAL_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 = pKX->kxBlob->value.sequence->length; + start = pKX->kxBlob->value.sequence->data; + + 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; err: EVP_PKEY_CTX_free(pkey_ctx); + GOST_KX_MESSAGE_free(pKX); 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; + 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_DECODE_ERROR; - 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_INTERNAL_ERROR; - 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; + 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; } @@ -3153,6 +3450,7 @@ WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst) if (SSL_IS_DTLS(s)) { unsigned char sctpauthkey[64]; char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; + size_t labellen; /* * Add new shared key for SCTP-Auth, will be ignored if no SCTP * used. @@ -3160,11 +3458,18 @@ WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst) memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, sizeof(DTLS1_SCTP_AUTH_LABEL)); + /* Don't include the terminating zero. */ + labellen = sizeof(labelbuffer) - 1; + if (s->mode & SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG) + labellen += 1; + if (SSL_export_keying_material(s, sctpauthkey, sizeof(sctpauthkey), labelbuffer, - sizeof(labelbuffer), NULL, 0, + labellen, 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; } @@ -3180,15 +3485,15 @@ 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); + if (!s->s3.handshake_buffer) { + SSLfatal(s, SSL_AD_INTERNAL_ERROR, + SSL_F_TLS_POST_PROCESS_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); return WORK_ERROR; } /* @@ -3196,7 +3501,7 @@ 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; } } @@ -3206,49 +3511,66 @@ 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; + + /* + * To get this far we must have read encrypted data from the client. We no + * longer tolerate unencrypted alerts. This value is ignored if less than + * TLSv1.3 + */ + s->statem.enc_read_state = ENC_READ_STATE_VALID; 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)) { @@ -3256,25 +3578,28 @@ 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, SSL_EXT_TLS1_3_CERTIFICATE, &rawexts, - &al, NULL, chainidx == 0) + NULL, chainidx == 0) || !tls_parse_all_extensions(s, SSL_EXT_TLS1_3_CERTIFICATE, - rawexts, x, chainidx, &al, + 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; } @@ -3282,44 +3607,65 @@ 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_CERTIFICATE_REQUIRED; - 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; + if (s->s3.handshake_buffer && !ssl3_digest_cached_records(s, 0)) { + /* 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) { + 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; } + + SSL_SESSION_free(s->session); + s->session = new_sess; } X509_free(s->session->peer); @@ -3334,9 +3680,8 @@ 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; } /* @@ -3346,22 +3691,21 @@ 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; @@ -3369,11 +3713,11 @@ 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; + CERT_PKEY *cpk = s->s3.tmp.cert; 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; } @@ -3381,17 +3725,57 @@ 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; @@ -3404,31 +3788,8 @@ 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; - 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) { - SSLerr(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; - } /* get session encoding length */ slen_full = i2d_SSL_SESSION(s->session, NULL); @@ -3437,42 +3798,55 @@ int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt) * long */ if (slen_full == 0 || slen_full > 0xFF00) { - 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; } senc = OPENSSL_malloc(slen_full); if (senc == 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; } 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; } @@ -3492,8 +3866,9 @@ 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); @@ -3501,40 +3876,36 @@ 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_ex(s->ctx->libctx, 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: 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) - || (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 */ @@ -3557,26 +3928,179 @@ 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, - SSL_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: - ossl_statem_set_error(s); 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); + 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 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_ex(s->ctx->libctx, 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, 1)) { + /* 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 (SSL_IS_TLS13(s) + && ((s->options & SSL_OP_NO_TICKET) != 0 + || (s->max_early_data > 0 + && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0))) { + 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; } @@ -3589,7 +4113,8 @@ 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; } @@ -3599,7 +4124,7 @@ 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; } @@ -3615,7 +4140,6 @@ MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt) { PACKET next_proto, padding; size_t next_proto_len; - int al = SSL_AD_INTERNAL_ERROR; /*- * The payload looks like: @@ -3627,91 +4151,48 @@ 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) { - al = SSL_AD_DECODE_ERROR; - 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: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - 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, SSL_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); + NULL, 0)) { + /* SSLfatal() already called */ return 0; } return 1; } -static int tls_construct_hello_retry_request(SSL *s, WPACKET *pkt) -{ - int al = SSL_AD_INTERNAL_ERROR; - size_t len = 0; - - /* - * TODO(TLS1.3): Remove the DRAFT version before release - * (should be s->version) - */ - if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT) - || !s->method->put_cipher_by_char(s->s3->tmp.new_cipher, pkt, &len) - || !tls_construct_extensions(s, pkt, - SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST, - NULL, 0, &al)) { - SSLerr(SSL_F_TLS_CONSTRUCT_HELLO_RETRY_REQUEST, ERR_R_INTERNAL_ERROR); - goto err; - } - - /* 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)) - goto err; - - return 1; - err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - return 0; -} - MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt) { - int al = SSL_AD_INTERNAL_ERROR; - if (PACKET_remaining(pkt) != 0) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, SSL_R_LENGTH_MISMATCH); - ossl_statem_set_error(s); + 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) { - SSLerr(SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, ERR_R_INTERNAL_ERROR); - goto err; + SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, + ERR_R_INTERNAL_ERROR); + return MSG_PROCESS_ERROR; } /* @@ -3719,22 +4200,18 @@ MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt) * a record boundary. */ if (RECORD_LAYER_processed_read_pending(&s->rlayer)) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, - SSL_R_NOT_ON_RECORD_BOUNDARY); - goto err; + SSLfatal(s, SSL_AD_UNEXPECTED_MESSAGE, + SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, + SSL_R_NOT_ON_RECORD_BOUNDARY); + return MSG_PROCESS_ERROR; } 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)) { - SSLerr(SSL_F_TLS_PROCESS_END_OF_EARLY_DATA, ERR_R_INTERNAL_ERROR); - goto err; + /* SSLfatal() already called */ + return MSG_PROCESS_ERROR; } return MSG_PROCESS_CONTINUE_READING; - err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - ossl_statem_set_error(s); - return MSG_PROCESS_ERROR; }