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FTP servers using SSL can be configured to check TLS session reuse on the DATA connection. They hand out a new session on every CONTROL connect and require to see the client using exactly that one when up-/downloading on DATA. This means: 1. We have to configure the SSL filter on the DATA connection with exactly the same peers. 2. We have to remember the SSL session on the CONTROL connection - separately from the session cache. The SSL filter on the DATA connection then looks for a session at the CONTROL filter and, if present, uses that. Tests: Enable `require_ssl_reuse` in our pytest setup for vsftpd. This reproduces the problem reported in #22225 and verifies the fix. Skip ftp+SSL pytests for rustls, as we have no possibility to reuse sessions in that backend. Schannel: we do not run these tests with the backend. I expect it has similar problems but am not able to verify. Reported-by: Laurent Sabourin Fixes #22225 Closes #22246
211 lines
7.7 KiB
C
211 lines
7.7 KiB
C
#ifndef HEADER_CURL_SSLUSE_H
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#define HEADER_CURL_SSLUSE_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifdef USE_OPENSSL
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#ifdef USE_WIN32_CRYPTO
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#include <wincrypt.h>
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/* If <wincrypt.h> is included directly, or indirectly via <schannel.h>,
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* <winldap.h>, <iphlpapi.h>, or something else, <wincrypt.h> does this:
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* #define X509_NAME ((LPCSTR)7)
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*
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* In AWS-LC/BoringSSL's <openssl/base.h> there is:
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* typedef struct X509_name_st X509_NAME;
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* etc.
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*
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* The redefined symbols break these OpenSSL headers when included after
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* <wincrypt.h>.
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* The workaround is to undefine those defines here (and only here).
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*
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* For unity builds it may need to be repeated elsewhere too, e.g. in ldap.c,
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* to apply to other sources using OpenSSL includes. Each compilation unit
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* needs undefine them between the first <wincrypt.h> include and the first
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* OpenSSL include.
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*
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* OpenSSL does this in <openssl/ssl.h> and <openssl/x509v3.h>, but it
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* also does the #undef by including <openssl/ossl_typ.h>. <3.1.0 only does
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* it on the first include.
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*
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* LibreSSL automatically undefines these symbols before using them.
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*/
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#undef X509_NAME
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#undef X509_EXTENSIONS
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#undef PKCS7_ISSUER_AND_SERIAL
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#undef PKCS7_SIGNER_INFO
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#undef OCSP_REQUEST
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#undef OCSP_RESPONSE
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#endif /* USE_WIN32_CRYPTO */
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/*
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* This header should only be needed to get included by vtls.c, openssl.c
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* and ngtcp2.c
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*/
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#include <openssl/opensslv.h>
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#include <openssl/ossl_typ.h>
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#include <openssl/ssl.h>
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#include "urldata.h"
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#if OPENSSL_VERSION_NUMBER >= 0x30000000L
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#define HAVE_OPENSSL3 /* non-fork OpenSSL 3.x or later */
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#endif
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#if defined(OPENSSL_IS_AWSLC) || defined(OPENSSL_IS_BORINGSSL)
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#define HAVE_BORINGSSL_LIKE
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#endif
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/* OpenSSL 3.5.0+ has built-in 'SSLKEYLOGFILE' support if built with
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'enable-sslkeylog' */
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#if OPENSSL_VERSION_NUMBER >= 0x30500000L && !defined(OPENSSL_NO_SSLKEYLOG)
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#define HAVE_KEYLOG_UPSTREAM
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#endif
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/*
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* Whether SSL_CTX_set_keylog_callback is available.
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* BoringSSL: supported since d28f59c27bac (committed 2015-11-19)
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* LibreSSL: not supported. 3.5.0+ has a stub function that does nothing.
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* OpenSSL: supported since 1.1.1 https://github.com/openssl/openssl/pull/2287
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*/
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#ifndef LIBRESSL_VERSION_NUMBER
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#define HAVE_KEYLOG_CALLBACK
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#endif
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/* Check for OpenSSL 1.1.1 which has early data support. */
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#undef HAVE_OPENSSL_EARLYDATA
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#if defined(TLS1_3_VERSION) && !defined(HAVE_BORINGSSL_LIKE)
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#define HAVE_OPENSSL_EARLYDATA
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#endif
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#ifdef LIBRESSL_VERSION_NUMBER
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typedef long ctx_option_t;
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#elif defined(HAVE_BORINGSSL_LIKE)
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typedef uint32_t ctx_option_t;
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#else
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typedef uint64_t ctx_option_t;
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#endif
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struct alpn_spec;
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struct ssl_peer;
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struct Curl_ssl_session;
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/* Struct to hold a curl OpenSSL instance */
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struct ossl_ctx {
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/* these ones requires specific SSL-types */
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SSL_CTX *ssl_ctx;
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SSL *ssl;
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BIO_METHOD *bio_method;
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CURLcode io_result; /* result of last BIO cfilter operation */
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/* blocked writes need to retry with same length, remember it */
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int blocked_ssl_write_len;
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#if !defined(HAVE_KEYLOG_UPSTREAM) && !defined(HAVE_KEYLOG_CALLBACK)
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/* Set to true once a valid keylog entry has been created to avoid dupes.
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This is a bool and not a bitfield because it is passed by address. */
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bool keylog_done;
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#endif
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BIT(x509_store_setup); /* x509 store has been set up */
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BIT(store_is_empty); /* no certs/paths/blobs in x509 store */
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BIT(reused_session); /* session-ID was reused for this */
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#ifdef USE_APPLE_SECTRUST
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BIT(sectrust_verified); /* peer was verified by sectrust */
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BIT(sectrust_session); /* session from sectrust verified peer */
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#endif
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};
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size_t Curl_ossl_version(char *buffer, size_t size);
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typedef CURLcode Curl_ossl_ctx_setup_cb(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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void *user_data);
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typedef int Curl_ossl_new_session_cb(SSL *ssl, SSL_SESSION *ssl_sessionid);
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typedef CURLcode Curl_ossl_init_session_reuse_cb(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct alpn_spec *alpns,
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struct Curl_ssl_session *scs,
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bool *do_early_data);
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CURLcode Curl_ossl_ctx_init(struct ossl_ctx *octx,
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struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct ssl_peer *peer,
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const struct alpn_spec *alpns_requested,
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Curl_ossl_ctx_setup_cb *cb_setup,
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void *cb_user_data,
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Curl_ossl_new_session_cb *cb_new_session,
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void *ssl_user_data,
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Curl_ossl_init_session_reuse_cb *sess_reuse_cb);
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/* Is a resolved HTTPS-RR needed for initializing OpenSSL? */
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bool Curl_ossl_need_httpsrr(struct Curl_easy *data);
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#ifndef HAVE_OPENSSL3
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#define SSL_get1_peer_certificate SSL_get_peer_certificate
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#endif
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extern const struct Curl_ssl Curl_ssl_openssl;
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/**
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* Setup the OpenSSL X509_STORE in `ssl_ctx` for the cfilter `cf` and
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* easy handle `data`. Allows reuse of a shared cache if suitable
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* and configured.
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*/
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CURLcode Curl_ssl_setup_x509_store(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct ossl_ctx *octx);
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CURLcode Curl_ossl_ctx_configure(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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SSL_CTX *ssl_ctx);
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/*
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* Add a new session to the cache. Takes ownership of the session.
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*/
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CURLcode Curl_ossl_add_session(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct ossl_ctx *octx,
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const char *ssl_peer_key,
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SSL_SESSION *session,
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const char *alpn,
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unsigned char *quic_tp,
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size_t quic_tp_len,
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struct Curl_ssl_session **psession);
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/*
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* Get the server cert, verify it and show it, etc., only call failf() if
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* SSL config verifypeer or -host is set. Otherwise all this is for
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* informational purposes only!
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*/
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CURLcode Curl_ossl_check_peer_cert(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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struct ossl_ctx *octx,
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struct ssl_peer *peer);
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/* Report properties of a successful handshake */
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void Curl_ossl_report_handshake(struct Curl_easy *data, struct ossl_ctx *octx);
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#endif /* USE_OPENSSL */
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#endif /* HEADER_CURL_SSLUSE_H */
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