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- // Copyright 2014 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef NET_SSL_SSL_CONFIG_H_
- #define NET_SSL_SSL_CONFIG_H_
- #include <stdint.h>
- #include "base/containers/flat_map.h"
- #include "base/memory/ref_counted.h"
- #include "net/base/net_export.h"
- #include "net/base/network_isolation_key.h"
- #include "net/base/privacy_mode.h"
- #include "net/cert/cert_status_flags.h"
- #include "net/cert/x509_certificate.h"
- #include "net/socket/next_proto.h"
- #include "net/ssl/ssl_private_key.h"
- #include "third_party/abseil-cpp/absl/types/optional.h"
- namespace net {
- // Various TLS/SSL ProtocolVersion values encoded as uint16_t
- // struct {
- // uint8_t major;
- // uint8_t minor;
- // } ProtocolVersion;
- // The most significant byte is |major|, and the least significant byte
- // is |minor|.
- enum {
- SSL_PROTOCOL_VERSION_TLS1 = 0x0301,
- SSL_PROTOCOL_VERSION_TLS1_1 = 0x0302,
- SSL_PROTOCOL_VERSION_TLS1_2 = 0x0303,
- SSL_PROTOCOL_VERSION_TLS1_3 = 0x0304,
- };
- // Default minimum protocol version.
- NET_EXPORT extern const uint16_t kDefaultSSLVersionMin;
- // Default maximum protocol version.
- NET_EXPORT extern const uint16_t kDefaultSSLVersionMax;
- // A collection of SSL-related configuration settings.
- struct NET_EXPORT SSLConfig {
- using ApplicationSettings = base::flat_map<NextProto, std::vector<uint8_t>>;
- // Default to revocation checking.
- SSLConfig();
- SSLConfig(const SSLConfig& other);
- ~SSLConfig();
- // Returns true if |cert| is one of the certs in |allowed_bad_certs|.
- // The expected cert status is written to |cert_status|. |*cert_status| can
- // be NULL if user doesn't care about the cert status.
- bool IsAllowedBadCert(X509Certificate* cert, CertStatus* cert_status) const;
- // Returns the set of flags to use for certificate verification, which is a
- // bitwise OR of CertVerifier::VerifyFlags that represent this SSLConfig's
- // configuration.
- int GetCertVerifyFlags() const;
- // If specified, the minimum and maximum protocol versions that are enabled.
- // (Use the SSL_PROTOCOL_VERSION_xxx enumerators defined above.) If
- // unspecified, values from the SSLConfigService are used.
- absl::optional<uint16_t> version_min_override;
- absl::optional<uint16_t> version_max_override;
- // Whether early data is enabled on this connection. Note that early data has
- // weaker security properties than normal data and changes the
- // SSLClientSocket's behavior. The caller must only send replayable data prior
- // to handshake confirmation. See StreamSocket::ConfirmHandshake for details.
- //
- // Additionally, early data may be rejected by the server, resulting in some
- // socket operation failing with ERR_EARLY_DATA_REJECTED or
- // ERR_WRONG_VERSION_ON_EARLY_DATA before any data is returned from the
- // server. The caller must handle these cases, typically by retrying the
- // high-level operation.
- //
- // If unsure, do not enable this option.
- bool early_data_enabled = false;
- // If true, causes only ECDHE cipher suites to be enabled.
- bool require_ecdhe = false;
- // If true, causes SHA-1 signature algorithms in TLS 1.2 to be disabled.
- bool disable_legacy_crypto = false;
- // TODO(wtc): move the following members to a new SSLParams structure. They
- // are not SSL configuration settings.
- struct NET_EXPORT CertAndStatus {
- CertAndStatus();
- CertAndStatus(scoped_refptr<X509Certificate> cert, CertStatus status);
- CertAndStatus(const CertAndStatus&);
- ~CertAndStatus();
- scoped_refptr<X509Certificate> cert;
- CertStatus cert_status = 0;
- };
- // Add any known-bad SSL certificate (with its cert status) to
- // |allowed_bad_certs| that should not trigger an ERR_CERT_* error when
- // calling SSLClientSocket::Connect. This would normally be done in
- // response to the user explicitly accepting the bad certificate.
- std::vector<CertAndStatus> allowed_bad_certs;
- // True if all certificate errors should be ignored.
- bool ignore_certificate_errors = false;
- // True if, for a single connection, any dependent network fetches should
- // be disabled. This can be used to avoid triggering re-entrancy in the
- // network layer. For example, fetching a PAC script over HTTPS may cause
- // AIA, OCSP, or CRL fetches to block on retrieving the PAC script, while
- // the PAC script fetch is waiting for those dependent fetches, creating a
- // deadlock.
- bool disable_cert_verification_network_fetches = false;
- // The list of application level protocols supported with ALPN (Application
- // Layer Protocol Negotiation), in decreasing order of preference. Protocols
- // will be advertised in this order during TLS handshake.
- NextProtoVector alpn_protos;
- // True if renegotiation should be allowed for the default application-level
- // protocol when the peer does not negotiate ALPN.
- bool renego_allowed_default = false;
- // The list of application-level protocols to enable renegotiation for.
- NextProtoVector renego_allowed_for_protos;
- // ALPS TLS extension is enabled and corresponding data is sent to server
- // for each NextProto in |application_settings|. Data might be empty.
- ApplicationSettings application_settings;
- // If the PartitionSSLSessionsByNetworkIsolationKey feature is enabled, the
- // session cache is partitioned by this value.
- NetworkIsolationKey network_isolation_key;
- // If non-empty, a serialized ECHConfigList to use to encrypt the ClientHello.
- // If this field is non-empty, callers should handle |ERR_ECH_NOT_NEGOTIATED|
- // errors from Connect() by calling GetECHRetryConfigs() to determine how to
- // retry the connection.
- std::vector<uint8_t> ech_config_list;
- // An additional boolean to partition the session cache by.
- //
- // TODO(https://crbug.com/775438, https://crbug.com/951205): This should
- // additionally disable client certificates, once client certificate handling
- // is moved into SSLClientContext. With client certificates are disabled, the
- // current session cache partitioning behavior will be needed to correctly
- // implement it. For now, it acts as an incomplete version of
- // PartitionSSLSessionsByNetworkIsolationKey.
- PrivacyMode privacy_mode = PRIVACY_MODE_DISABLED;
- // True if the post-handshake peeking of the transport should be skipped. This
- // logic ensures tickets are resolved early, but can interfere with some unit
- // tests.
- bool disable_post_handshake_peek_for_testing = false;
- };
- } // namespace net
- #endif // NET_SSL_SSL_CONFIG_H_
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