reality

package module
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 Go to latest Published: Oct 15, 2024 License: MPL-2.0 Imports: 48 Imported by: 7

README

REALITY

THE NEXT FUTURE

Server side implementation of REALITY protocol, a fork of package tls in latest Go. For client side, please follow https://github.com/XTLS/Xray-core/blob/main/transport/internet/reality/reality.go.

TODO List: TODO

VLESS-XTLS-uTLS-REALITY example for Xray-core

中文 | English

{
    "inbounds": [ // 服务端入站配置
        {
            "listen": "0.0.0.0",
            "port": 443,
            "protocol": "vless",
            "settings": {
                "clients": [
                    {
                        "id": "", // 必填，执行 ./xray uuid 生成，或 1-30 字节的字符串
                        "flow": "xtls-rprx-vision" // 选填，若有，客户端必须启用 XTLS
                    }
                ],
                "decryption": "none"
            },
            "streamSettings": {
                "network": "tcp",
                "security": "reality",
                "realitySettings": {
                    "show": false, // 选填，若为 true，输出调试信息
                    "dest": "example.com:443", // 必填，格式同 VLESS fallbacks 的 dest
                    "xver": 0, // 选填，格式同 VLESS fallbacks 的 xver
                    "serverNames": [ // 必填，客户端可用的 serverName 列表，暂不支持 * 通配符
                        "example.com",
                        "www.example.com"
                    ],
                    "privateKey": "", // 必填，执行 ./xray x25519 生成
                    "minClientVer": "", // 选填，客户端 Xray 最低版本，格式为 x.y.z
                    "maxClientVer": "", // 选填，客户端 Xray 最高版本，格式为 x.y.z
                    "maxTimeDiff": 0, // 选填，允许的最大时间差，单位为毫秒
                    "shortIds": [ // 必填，客户端可用的 shortId 列表，可用于区分不同的客户端
                        "", // 若有此项，客户端 shortId 可为空
                        "0123456789abcdef" // 0 到 f，长度为 2 的倍数，长度上限为 16
                    ]
                }
            }
        }
    ]
}

若用 REALITY 取代 TLS，可消除服务端 TLS 指纹特征，仍有前向保密性等，且证书链攻击无效，安全性超越常规 TLS
可以指向别人的网站，无需自己买域名、配置 TLS 服务端，更方便，实现向中间人呈现指定 SNI 的全程真实 TLS

通常代理用途，目标网站最低标准：国外网站，支持 TLSv1.3 与 H2，域名非跳转用（主域名可能被用于跳转到 www）
加分项：IP 相近（更像，且延迟低），Server Hello 后的握手消息一起加密（如 dl.google.com），有 OCSP Stapling
配置加分项：禁回国流量，TCP/80、UDP/443 也转发（REALITY 对外表现即为端口转发，目标 IP 冷门或许更好）

REALITY 也可以搭配 XTLS 以外的代理协议使用，但不建议这样做，因为它们存在明显且已被针对的 TLS in TLS 特征
REALITY 的下一个主要目标是“预先构建模式”，即提前采集目标网站特征，XTLS 的下一个主要目标是 0-RTT

{
    "outbounds": [ // 客户端出站配置
        {
            "protocol": "vless",
            "settings": {
                "vnext": [
                    {
                        "address": "", // 服务端的域名或 IP
                        "port": 443,
                        "users": [
                            {
                                "id": "", // 与服务端一致
                                "flow": "xtls-rprx-vision", // 与服务端一致
                                "encryption": "none"
                            }
                        ]
                    }
                ]
            },
            "streamSettings": {
                "network": "tcp",
                "security": "reality",
                "realitySettings": {
                    "show": false, // 选填，若为 true，输出调试信息
                    "fingerprint": "chrome", // 必填，使用 uTLS 库模拟客户端 TLS 指纹
                    "serverName": "", // 服务端 serverNames 之一
                    "publicKey": "", // 服务端私钥对应的公钥
                    "shortId": "", // 服务端 shortIds 之一
                    "spiderX": "" // 爬虫初始路径与参数，建议每个客户端不同
                }
            }
        }
    ]
}

REALITY 客户端应当收到由“临时认证密钥”签发的“临时可信证书”，但以下三种情况会收到目标网站的真证书：

  1. REALITY 服务端拒绝了客户端的 Client Hello，流量被导入目标网站
  2. 客户端的 Client Hello 被中间人重定向至目标网站
  3. 中间人攻击，可能是目标网站帮忙，也可能是证书链攻击

REALITY 客户端可以完美区分临时可信证书、真证书、无效证书，并决定下一步动作：

  1. 收到临时可信证书时，连接可用，一切如常
  2. 收到真证书时，进入爬虫模式
  3. 收到无效证书时，TLS alert，断开连接

Stargazers over time

Stargazers over time

Documentation

Overview

Package tls partially implements TLS 1.2, as specified in RFC 5246, and TLS 1.3, as specified in RFC 8446.

Index

Constants

View Source 
const (
	// TLS 1.0 - 1.2 cipher suites.
	TLS_RSA_WITH_RC4_128_SHA                      uint16 = 0x0005
	TLS_RSA_WITH_3DES_EDE_CBC_SHA                 uint16 = 0x000a
	TLS_RSA_WITH_AES_128_CBC_SHA                  uint16 = 0x002f
	TLS_RSA_WITH_AES_256_CBC_SHA                  uint16 = 0x0035
	TLS_RSA_WITH_AES_128_CBC_SHA256               uint16 = 0x003c
	TLS_RSA_WITH_AES_128_GCM_SHA256               uint16 = 0x009c
	TLS_RSA_WITH_AES_256_GCM_SHA384               uint16 = 0x009d
	TLS_ECDHE_ECDSA_WITH_RC4_128_SHA              uint16 = 0xc007
	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA          uint16 = 0xc009
	TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA          uint16 = 0xc00a
	TLS_ECDHE_RSA_WITH_RC4_128_SHA                uint16 = 0xc011
	TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA           uint16 = 0xc012
	TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA            uint16 = 0xc013
	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA            uint16 = 0xc014
	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256       uint16 = 0xc023
	TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256         uint16 = 0xc027
	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256         uint16 = 0xc02f
	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256       uint16 = 0xc02b
	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384         uint16 = 0xc030
	TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384       uint16 = 0xc02c
	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   uint16 = 0xcca8
	TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 uint16 = 0xcca9

	// TLS 1.3 cipher suites.
	TLS_AES_128_GCM_SHA256       uint16 = 0x1301
	TLS_AES_256_GCM_SHA384       uint16 = 0x1302
	TLS_CHACHA20_POLY1305_SHA256 uint16 = 0x1303

	// TLS_FALLBACK_SCSV isn't a standard cipher suite but an indicator
	// that the client is doing version fallback. See RFC 7507.
	TLS_FALLBACK_SCSV uint16 = 0x5600

	// Legacy names for the corresponding cipher suites with the correct _SHA256
	// suffix, retained for backward compatibility.
	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305   = TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256
	TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305 = TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256
)

A list of cipher suite IDs that are, or have been, implemented by this package.

See https://www.iana.org/assignments/tls-parameters/tls-parameters.xml

View Source 
const (
	VersionTLS10 = 0x0301
	VersionTLS11 = 0x0302
	VersionTLS12 = 0x0303
	VersionTLS13 = 0x0304

	// Deprecated: SSLv3 is cryptographically broken, and is no longer
	// supported by this package. See golang.org/issue/32716.
	VersionSSL30 = 0x0300
)
View Source 
const (
	QUICEncryptionLevelInitial = QUICEncryptionLevel(iota)
	QUICEncryptionLevelEarly
	QUICEncryptionLevelHandshake
	QUICEncryptionLevelApplication
)

Variables

This section is empty.

Functions

func CipherSuiteName 

func CipherSuiteName(id uint16) string

CipherSuiteName returns the standard name for the passed cipher suite ID (e.g. "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256"), or a fallback representation of the ID value if the cipher suite is not implemented by this package.

func Listen 

func Listen(network, laddr string, config *Config) (net.Listener, error)

Listen creates a TLS listener accepting connections on the given network address using net.Listen. The configuration config must be non-nil and must include at least one certificate or else set GetCertificate.

func NewListener 

func NewListener(inner net.Listener, config *Config) net.Listener

NewListener creates a Listener which accepts connections from an inner Listener and wraps each connection with Server. The configuration config must be non-nil and must include at least one certificate or else set GetCertificate.

func Value 

func Value(vals ...byte) (value int)

func VersionName 

func VersionName(version uint16) string

VersionName returns the name for the provided TLS version number (e.g. "TLS 1.3"), or a fallback representation of the value if the version is not implemented by this package.

Types

type AlertError 

type AlertError uint8

An AlertError is a TLS alert.

When using a QUIC transport, QUICConn methods will return an error which wraps AlertError rather than sending a TLS alert.

func (AlertError) Error 

func (e AlertError) Error() string

type Certificate 

type Certificate struct {
	Certificate [][]byte
	// PrivateKey contains the private key corresponding to the public key in
	// Leaf. This must implement crypto.Signer with an RSA, ECDSA or Ed25519 PublicKey.
	// For a server up to TLS 1.2, it can also implement crypto.Decrypter with
	// an RSA PublicKey.
	PrivateKey crypto.PrivateKey
	// SupportedSignatureAlgorithms is an optional list restricting what
	// signature algorithms the PrivateKey can be used for.
	SupportedSignatureAlgorithms []SignatureScheme
	// OCSPStaple contains an optional OCSP response which will be served
	// to clients that request it.
	OCSPStaple []byte
	// SignedCertificateTimestamps contains an optional list of Signed
	// Certificate Timestamps which will be served to clients that request it.
	SignedCertificateTimestamps [][]byte
	// Leaf is the parsed form of the leaf certificate, which may be initialized
	// using x509.ParseCertificate to reduce per-handshake processing. If nil,
	// the leaf certificate will be parsed as needed.
	Leaf *x509.Certificate
}

A Certificate is a chain of one or more certificates, leaf first.

func LoadX509KeyPair 

func LoadX509KeyPair(certFile, keyFile string) (Certificate, error)

LoadX509KeyPair reads and parses a public/private key pair from a pair of files. The files must contain PEM encoded data. The certificate file may contain intermediate certificates following the leaf certificate to form a certificate chain. On successful return, Certificate.Leaf will be populated.

Before Go 1.23 Certificate.Leaf was left nil, and the parsed certificate was discarded. This behavior can be re-enabled by setting "x509keypairleaf=0" in the GODEBUG environment variable.

func X509KeyPair 

func X509KeyPair(certPEMBlock, keyPEMBlock []byte) (Certificate, error)

X509KeyPair parses a public/private key pair from a pair of PEM encoded data. On successful return, Certificate.Leaf will be populated.

Before Go 1.23 Certificate.Leaf was left nil, and the parsed certificate was discarded. This behavior can be re-enabled by setting "x509keypairleaf=0" in the GODEBUG environment variable.

type CertificateRequestInfo 

type CertificateRequestInfo struct {
	// AcceptableCAs contains zero or more, DER-encoded, X.501
	// Distinguished Names. These are the names of root or intermediate CAs
	// that the server wishes the returned certificate to be signed by. An
	// empty slice indicates that the server has no preference.
	AcceptableCAs [][]byte

	// SignatureSchemes lists the signature schemes that the server is
	// willing to verify.
	SignatureSchemes []SignatureScheme

	// Version is the TLS version that was negotiated for this connection.
	Version uint16
	// contains filtered or unexported fields
}

CertificateRequestInfo contains information from a server's CertificateRequest message, which is used to demand a certificate and proof of control from a client.

func (*CertificateRequestInfo) Context 

func (c *CertificateRequestInfo) Context() context.Context

Context returns the context of the handshake that is in progress. This context is a child of the context passed to HandshakeContext, if any, and is canceled when the handshake concludes.

func (*CertificateRequestInfo) SupportsCertificate 

func (cri *CertificateRequestInfo) SupportsCertificate(c *Certificate) error

SupportsCertificate returns nil if the provided certificate is supported by the server that sent the CertificateRequest. Otherwise, it returns an error describing the reason for the incompatibility.

type CertificateVerificationError 

type CertificateVerificationError struct {
	// UnverifiedCertificates and its contents should not be modified.
	UnverifiedCertificates []*x509.Certificate
	Err                    error
}

CertificateVerificationError is returned when certificate verification fails during the handshake.

func (*CertificateVerificationError) Error 

func (e *CertificateVerificationError) Error() string

func (*CertificateVerificationError) Unwrap 

func (e *CertificateVerificationError) Unwrap() error

type CipherSuite 

type CipherSuite struct {
	ID   uint16
	Name string

	// Supported versions is the list of TLS protocol versions that can
	// negotiate this cipher suite.
	SupportedVersions []uint16

	// Insecure is true if the cipher suite has known security issues
	// due to its primitives, design, or implementation.
	Insecure bool
}

CipherSuite is a TLS cipher suite. Note that most functions in this package accept and expose cipher suite IDs instead of this type.

func CipherSuites 

func CipherSuites() []*CipherSuite

CipherSuites returns a list of cipher suites currently implemented by this package, excluding those with security issues, which are returned by InsecureCipherSuites.

The list is sorted by ID. Note that the default cipher suites selected by this package might depend on logic that can't be captured by a static list, and might not match those returned by this function.

func InsecureCipherSuites 

func InsecureCipherSuites() []*CipherSuite

InsecureCipherSuites returns a list of cipher suites currently implemented by this package and which have security issues.

Most applications should not use the cipher suites in this list, and should only use those returned by CipherSuites.

type ClientAuthType 

type ClientAuthType int

ClientAuthType declares the policy the server will follow for TLS Client Authentication. 

const (
	// NoClientCert indicates that no client certificate should be requested
	// during the handshake, and if any certificates are sent they will not
	// be verified.
	NoClientCert ClientAuthType = iota
	// RequestClientCert indicates that a client certificate should be requested
	// during the handshake, but does not require that the client send any
	// certificates.
	RequestClientCert
	// RequireAnyClientCert indicates that a client certificate should be requested
	// during the handshake, and that at least one certificate is required to be
	// sent by the client, but that certificate is not required to be valid.
	RequireAnyClientCert
	// VerifyClientCertIfGiven indicates that a client certificate should be requested
	// during the handshake, but does not require that the client sends a
	// certificate. If the client does send a certificate it is required to be
	// valid.
	VerifyClientCertIfGiven
	// RequireAndVerifyClientCert indicates that a client certificate should be requested
	// during the handshake, and that at least one valid certificate is required
	// to be sent by the client.
	RequireAndVerifyClientCert
)

func (ClientAuthType) String 

func (i ClientAuthType) String() string

type ClientHelloInfo 

type ClientHelloInfo struct {
	// CipherSuites lists the CipherSuites supported by the client (e.g.
	// TLS_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256).
	CipherSuites []uint16

	// ServerName indicates the name of the server requested by the client
	// in order to support virtual hosting. ServerName is only set if the
	// client is using SNI (see RFC 4366, Section 3.1).
	ServerName string

	// SupportedCurves lists the elliptic curves supported by the client.
	// SupportedCurves is set only if the Supported Elliptic Curves
	// Extension is being used (see RFC 4492, Section 5.1.1).
	SupportedCurves []CurveID

	// SupportedPoints lists the point formats supported by the client.
	// SupportedPoints is set only if the Supported Point Formats Extension
	// is being used (see RFC 4492, Section 5.1.2).
	SupportedPoints []uint8

	// SignatureSchemes lists the signature and hash schemes that the client
	// is willing to verify. SignatureSchemes is set only if the Signature
	// Algorithms Extension is being used (see RFC 5246, Section 7.4.1.4.1).
	SignatureSchemes []SignatureScheme

	// SupportedProtos lists the application protocols supported by the client.
	// SupportedProtos is set only if the Application-Layer Protocol
	// Negotiation Extension is being used (see RFC 7301, Section 3.1).
	//
	// Servers can select a protocol by setting Config.NextProtos in a
	// GetConfigForClient return value.
	SupportedProtos []string

	// SupportedVersions lists the TLS versions supported by the client.
	// For TLS versions less than 1.3, this is extrapolated from the max
	// version advertised by the client, so values other than the greatest
	// might be rejected if used.
	SupportedVersions []uint16

	// Extensions lists the IDs of the extensions presented by the client
	// in the client hello.
	Extensions []uint16

	// Conn is the underlying net.Conn for the connection. Do not read
	// from, or write to, this connection; that will cause the TLS
	// connection to fail.
	Conn net.Conn
	// contains filtered or unexported fields
}

ClientHelloInfo contains information from a ClientHello message in order to guide application logic in the GetCertificate and GetConfigForClient callbacks.

func (*ClientHelloInfo) Context 

func (c *ClientHelloInfo) Context() context.Context

Context returns the context of the handshake that is in progress. This context is a child of the context passed to HandshakeContext, if any, and is canceled when the handshake concludes.

func (*ClientHelloInfo) SupportsCertificate 

func (chi *ClientHelloInfo) SupportsCertificate(c *Certificate) error

SupportsCertificate returns nil if the provided certificate is supported by the client that sent the ClientHello. Otherwise, it returns an error describing the reason for the incompatibility.

If this ClientHelloInfo was passed to a GetConfigForClient or GetCertificate callback, this method will take into account the associated Config. Note that if GetConfigForClient returns a different Config, the change can't be accounted for by this method.

This function will call x509.ParseCertificate unless c.Leaf is set, which can incur a significant performance cost.

type ClientSessionCache 

type ClientSessionCache interface {
	// Get searches for a ClientSessionState associated with the given key.
	// On return, ok is true if one was found.
	Get(sessionKey string) (session *ClientSessionState, ok bool)

	// Put adds the ClientSessionState to the cache with the given key. It might
	// get called multiple times in a connection if a TLS 1.3 server provides
	// more than one session ticket. If called with a nil *ClientSessionState,
	// it should remove the cache entry.
	Put(sessionKey string, cs *ClientSessionState)
}

ClientSessionCache is a cache of ClientSessionState objects that can be used by a client to resume a TLS session with a given server. ClientSessionCache implementations should expect to be called concurrently from different goroutines. Up to TLS 1.2, only ticket-based resumption is supported, not SessionID-based resumption. In TLS 1.3 they were merged into PSK modes, which are supported via this interface.

func NewLRUClientSessionCache 

func NewLRUClientSessionCache(capacity int) ClientSessionCache

NewLRUClientSessionCache returns a ClientSessionCache with the given capacity that uses an LRU strategy. If capacity is < 1, a default capacity is used instead.

type ClientSessionState 

type ClientSessionState struct {
	// contains filtered or unexported fields
}

ClientSessionState contains the state needed by a client to resume a previous TLS session.

func NewResumptionState 

func NewResumptionState(ticket []byte, state *SessionState) (*ClientSessionState, error)

NewResumptionState returns a state value that can be returned by [ClientSessionCache.Get] to resume a previous session.

state needs to be returned by ParseSessionState, and the ticket and session state must have been returned by ClientSessionState.ResumptionState.

func (*ClientSessionState) ResumptionState 

func (cs *ClientSessionState) ResumptionState() (ticket []byte, state *SessionState, err error)

ResumptionState returns the session ticket sent by the server (also known as the session's identity) and the state necessary to resume this session.

It can be called by [ClientSessionCache.Put] to serialize (with SessionState.Bytes) and store the session.

type CloseWriteConn 

type CloseWriteConn interface {
	net.Conn
	CloseWrite() error
}

type Config 

type Config struct {
	DialContext func(ctx context.Context, network, address string) (net.Conn, error)

	Show bool
	Type string
	Dest string
	Xver byte

	ServerNames           map[string]bool
	PrivateKey            []byte
	MinClientVer          []byte
	MaxClientVer          []byte
	MaxTimeDiff           time.Duration
	ShortIds              map[[8]byte]bool
	SplitPacket           string
	ServerRandPacket      string
	ClientRandPacket      string
	ServerRandPacketCount string
	ClientRandPacketCount string
	PaddingSize           uint32
	SubChunkSize          uint32

	// Rand provides the source of entropy for nonces and RSA blinding.
	// If Rand is nil, TLS uses the cryptographic random reader in package
	// crypto/rand.
	// The Reader must be safe for use by multiple goroutines.
	Rand io.Reader

	// Time returns the current time as the number of seconds since the epoch.
	// If Time is nil, TLS uses time.Now.
	Time func() time.Time

	// Certificates contains one or more certificate chains to present to the
	// other side of the connection. The first certificate compatible with the
	// peer's requirements is selected automatically.
	//
	// Server configurations must set one of Certificates, GetCertificate or
	// GetConfigForClient. Clients doing client-authentication may set either
	// Certificates or GetClientCertificate.
	//
	// Note: if there are multiple Certificates, and they don't have the
	// optional field Leaf set, certificate selection will incur a significant
	// per-handshake performance cost.
	Certificates []Certificate

	// NameToCertificate maps from a certificate name to an element of
	// Certificates. Note that a certificate name can be of the form
	// '*.example.com' and so doesn't have to be a domain name as such.
	//
	// Deprecated: NameToCertificate only allows associating a single
	// certificate with a given name. Leave this field nil to let the library
	// select the first compatible chain from Certificates.
	NameToCertificate map[string]*Certificate

	// GetCertificate returns a Certificate based on the given
	// ClientHelloInfo. It will only be called if the client supplies SNI
	// information or if Certificates is empty.
	//
	// If GetCertificate is nil or returns nil, then the certificate is
	// retrieved from NameToCertificate. If NameToCertificate is nil, the
	// best element of Certificates will be used.
	//
	// Once a Certificate is returned it should not be modified.
	GetCertificate func(*ClientHelloInfo) (*Certificate, error)

	// GetClientCertificate, if not nil, is called when a server requests a
	// certificate from a client. If set, the contents of Certificates will
	// be ignored.
	//
	// If GetClientCertificate returns an error, the handshake will be
	// aborted and that error will be returned. Otherwise
	// GetClientCertificate must return a non-nil Certificate. If
	// Certificate.Certificate is empty then no certificate will be sent to
	// the server. If this is unacceptable to the server then it may abort
	// the handshake.
	//
	// GetClientCertificate may be called multiple times for the same
	// connection if renegotiation occurs or if TLS 1.3 is in use.
	//
	// Once a Certificate is returned it should not be modified.
	GetClientCertificate func(*CertificateRequestInfo) (*Certificate, error)

	// GetConfigForClient, if not nil, is called after a ClientHello is
	// received from a client. It may return a non-nil Config in order to
	// change the Config that will be used to handle this connection. If
	// the returned Config is nil, the original Config will be used. The
	// Config returned by this callback may not be subsequently modified.
	//
	// If GetConfigForClient is nil, the Config passed to Server() will be
	// used for all connections.
	//
	// If SessionTicketKey was explicitly set on the returned Config, or if
	// SetSessionTicketKeys was called on the returned Config, those keys will
	// be used. Otherwise, the original Config keys will be used (and possibly
	// rotated if they are automatically managed).
	GetConfigForClient func(*ClientHelloInfo) (*Config, error)

	// VerifyPeerCertificate, if not nil, is called after normal
	// certificate verification by either a TLS client or server. It
	// receives the raw ASN.1 certificates provided by the peer and also
	// any verified chains that normal processing found. If it returns a
	// non-nil error, the handshake is aborted and that error results.
	//
	// If normal verification fails then the handshake will abort before
	// considering this callback. If normal verification is disabled (on the
	// client when InsecureSkipVerify is set, or on a server when ClientAuth is
	// RequestClientCert or RequireAnyClientCert), then this callback will be
	// considered but the verifiedChains argument will always be nil. When
	// ClientAuth is NoClientCert, this callback is not called on the server.
	// rawCerts may be empty on the server if ClientAuth is RequestClientCert or
	// VerifyClientCertIfGiven.
	//
	// This callback is not invoked on resumed connections, as certificates are
	// not re-verified on resumption.
	//
	// verifiedChains and its contents should not be modified.
	VerifyPeerCertificate func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error

	// VerifyConnection, if not nil, is called after normal certificate
	// verification and after VerifyPeerCertificate by either a TLS client
	// or server. If it returns a non-nil error, the handshake is aborted
	// and that error results.
	//
	// If normal verification fails then the handshake will abort before
	// considering this callback. This callback will run for all connections,
	// including resumptions, regardless of InsecureSkipVerify or ClientAuth
	// settings.
	VerifyConnection func(ConnectionState) error

	// RootCAs defines the set of root certificate authorities
	// that clients use when verifying server certificates.
	// If RootCAs is nil, TLS uses the host's root CA set.
	RootCAs *x509.CertPool

	// NextProtos is a list of supported application level protocols, in
	// order of preference. If both peers support ALPN, the selected
	// protocol will be one from this list, and the connection will fail
	// if there is no mutually supported protocol. If NextProtos is empty
	// or the peer doesn't support ALPN, the connection will succeed and
	// ConnectionState.NegotiatedProtocol will be empty.
	NextProtos []string

	// ServerName is used to verify the hostname on the returned
	// certificates unless InsecureSkipVerify is given. It is also included
	// in the client's handshake to support virtual hosting unless it is
	// an IP address.
	ServerName string

	// ClientAuth determines the server's policy for
	// TLS Client Authentication. The default is NoClientCert.
	ClientAuth ClientAuthType

	// ClientCAs defines the set of root certificate authorities
	// that servers use if required to verify a client certificate
	// by the policy in ClientAuth.
	ClientCAs *x509.CertPool

	// InsecureSkipVerify controls whether a client verifies the server's
	// certificate chain and host name. If InsecureSkipVerify is true, crypto/tls
	// accepts any certificate presented by the server and any host name in that
	// certificate. In this mode, TLS is susceptible to machine-in-the-middle
	// attacks unless custom verification is used. This should be used only for
	// testing or in combination with VerifyConnection or VerifyPeerCertificate.
	InsecureSkipVerify bool

	// CipherSuites is a list of enabled TLS 1.0–1.2 cipher suites. The order of
	// the list is ignored. Note that TLS 1.3 ciphersuites are not configurable.
	//
	// If CipherSuites is nil, a safe default list is used. The default cipher
	// suites might change over time. In Go 1.22 RSA key exchange based cipher
	// suites were removed from the default list, but can be re-added with the
	// GODEBUG setting tlsrsakex=1. In Go 1.23 3DES cipher suites were removed
	// from the default list, but can be re-added with the GODEBUG setting
	// tls3des=1.
	CipherSuites []uint16

	// PreferServerCipherSuites is a legacy field and has no effect.
	//
	// It used to control whether the server would follow the client's or the
	// server's preference. Servers now select the best mutually supported
	// cipher suite based on logic that takes into account inferred client
	// hardware, server hardware, and security.
	//
	// Deprecated: PreferServerCipherSuites is ignored.
	PreferServerCipherSuites bool

	// SessionTicketsDisabled may be set to true to disable session ticket and
	// PSK (resumption) support. Note that on clients, session ticket support is
	// also disabled if ClientSessionCache is nil.
	SessionTicketsDisabled bool

	// SessionTicketKey is used by TLS servers to provide session resumption.
	// See RFC 5077 and the PSK mode of RFC 8446. If zero, it will be filled
	// with random data before the first server handshake.
	//
	// Deprecated: if this field is left at zero, session ticket keys will be
	// automatically rotated every day and dropped after seven days. For
	// customizing the rotation schedule or synchronizing servers that are
	// terminating connections for the same host, use SetSessionTicketKeys.
	SessionTicketKey [32]byte

	// ClientSessionCache is a cache of ClientSessionState entries for TLS
	// session resumption. It is only used by clients.
	ClientSessionCache ClientSessionCache

	// UnwrapSession is called on the server to turn a ticket/identity
	// previously produced by [WrapSession] into a usable session.
	//
	// UnwrapSession will usually either decrypt a session state in the ticket
	// (for example with [Config.EncryptTicket]), or use the ticket as a handle
	// to recover a previously stored state. It must use [ParseSessionState] to
	// deserialize the session state.
	//
	// If UnwrapSession returns an error, the connection is terminated. If it
	// returns (nil, nil), the session is ignored. crypto/tls may still choose
	// not to resume the returned session.
	UnwrapSession func(identity []byte, cs ConnectionState) (*SessionState, error)

	// WrapSession is called on the server to produce a session ticket/identity.
	//
	// WrapSession must serialize the session state with [SessionState.Bytes].
	// It may then encrypt the serialized state (for example with
	// [Config.DecryptTicket]) and use it as the ticket, or store the state and
	// return a handle for it.
	//
	// If WrapSession returns an error, the connection is terminated.
	//
	// Warning: the return value will be exposed on the wire and to clients in
	// plaintext. The application is in charge of encrypting and authenticating
	// it (and rotating keys) or returning high-entropy identifiers. Failing to
	// do so correctly can compromise current, previous, and future connections
	// depending on the protocol version.
	WrapSession func(ConnectionState, *SessionState) ([]byte, error)

	// MinVersion contains the minimum TLS version that is acceptable.
	//
	// By default, TLS 1.2 is currently used as the minimum. TLS 1.0 is the
	// minimum supported by this package.
	//
	// The server-side default can be reverted to TLS 1.0 by including the value
	// "tls10server=1" in the GODEBUG environment variable.
	MinVersion uint16

	// MaxVersion contains the maximum TLS version that is acceptable.
	//
	// By default, the maximum version supported by this package is used,
	// which is currently TLS 1.3.
	MaxVersion uint16

	// CurvePreferences contains the elliptic curves that will be used in
	// an ECDHE handshake, in preference order. If empty, the default will
	// be used. The client will use the first preference as the type for
	// its key share in TLS 1.3. This may change in the future.
	//
	// From Go 1.23, the default includes the X25519Kyber768Draft00 hybrid
	// post-quantum key exchange. To disable it, set CurvePreferences explicitly
	// or use the GODEBUG=tlskyber=0 environment variable.
	CurvePreferences []CurveID

	// DynamicRecordSizingDisabled disables adaptive sizing of TLS records.
	// When true, the largest possible TLS record size is always used. When
	// false, the size of TLS records may be adjusted in an attempt to
	// improve latency.
	DynamicRecordSizingDisabled bool

	// Renegotiation controls what types of renegotiation are supported.
	// The default, none, is correct for the vast majority of applications.
	Renegotiation RenegotiationSupport

	// KeyLogWriter optionally specifies a destination for TLS master secrets
	// in NSS key log format that can be used to allow external programs
	// such as Wireshark to decrypt TLS connections.
	// See https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format.
	// Use of KeyLogWriter compromises security and should only be
	// used for debugging.
	KeyLogWriter io.Writer

	// EncryptedClientHelloConfigList is a serialized ECHConfigList. If
	// provided, clients will attempt to connect to servers using Encrypted
	// Client Hello (ECH) using one of the provided ECHConfigs. Servers
	// currently ignore this field.
	//
	// If the list contains no valid ECH configs, the handshake will fail
	// and return an error.
	//
	// If EncryptedClientHelloConfigList is set, MinVersion, if set, must
	// be VersionTLS13.
	//
	// When EncryptedClientHelloConfigList is set, the handshake will only
	// succeed if ECH is sucessfully negotiated. If the server rejects ECH,
	// an ECHRejectionError error will be returned, which may contain a new
	// ECHConfigList that the server suggests using.
	//
	// How this field is parsed may change in future Go versions, if the
	// encoding described in the final Encrypted Client Hello RFC changes.
	EncryptedClientHelloConfigList []byte

	// EncryptedClientHelloRejectionVerify, if not nil, is called when ECH is
	// rejected, in order to verify the ECH provider certificate in the outer
	// Client Hello. If it returns a non-nil error, the handshake is aborted and
	// that error results.
	//
	// Unlike VerifyPeerCertificate and VerifyConnection, normal certificate
	// verification will not be performed before calling
	// EncryptedClientHelloRejectionVerify.
	//
	// If EncryptedClientHelloRejectionVerify is nil and ECH is rejected, the
	// roots in RootCAs will be used to verify the ECH providers public
	// certificate. VerifyPeerCertificate and VerifyConnection are not called
	// when ECH is rejected, even if set, and InsecureSkipVerify is ignored.
	EncryptedClientHelloRejectionVerify func(ConnectionState) error
	// contains filtered or unexported fields
}

A Config structure is used to configure a TLS client or server. After one has been passed to a TLS function it must not be modified. A Config may be reused; the tls package will also not modify it.

func (*Config) BuildNameToCertificate deprecated 

func (c *Config) BuildNameToCertificate()

BuildNameToCertificate parses c.Certificates and builds c.NameToCertificate from the CommonName and SubjectAlternateName fields of each of the leaf certificates.

Deprecated: NameToCertificate only allows associating a single certificate with a given name. Leave that field nil to let the library select the first compatible chain from Certificates.

func (*Config) Clone 

func (c *Config) Clone() *Config

Clone returns a shallow clone of c or nil if c is nil. It is safe to clone a Config that is being used concurrently by a TLS client or server.

func (*Config) DecryptTicket 

func (c *Config) DecryptTicket(identity []byte, cs ConnectionState) (*SessionState, error)

DecryptTicket decrypts a ticket encrypted by Config.EncryptTicket. It can be used as a [Config.UnwrapSession] implementation.

If the ticket can't be decrypted or parsed, DecryptTicket returns (nil, nil).

func (*Config) EncryptTicket 

func (c *Config) EncryptTicket(cs ConnectionState, ss *SessionState) ([]byte, error)

EncryptTicket encrypts a ticket with the Config's configured (or default) session ticket keys. It can be used as a [Config.WrapSession] implementation.

func (*Config) SetSessionTicketKeys 

func (c *Config) SetSessionTicketKeys(keys [][32]byte)

SetSessionTicketKeys updates the session ticket keys for a server.

The first key will be used when creating new tickets, while all keys can be used for decrypting tickets. It is safe to call this function while the server is running in order to rotate the session ticket keys. The function will panic if keys is empty.

Calling this function will turn off automatic session ticket key rotation.

If multiple servers are terminating connections for the same host they should all have the same session ticket keys. If the session ticket keys leaks, previously recorded and future TLS connections using those keys might be compromised.

type Conn 

type Conn struct {
	AuthKey       []byte
	ClientVer     [3]byte
	ClientTime    time.Time
	ClientShortId [8]byte
	// contains filtered or unexported fields
}

A Conn represents a secured connection. It implements the net.Conn interface.

func Client 

func Client(conn net.Conn, config *Config) *Conn

Client returns a new TLS client side connection using conn as the underlying transport. The config cannot be nil: users must set either ServerName or InsecureSkipVerify in the config.

func Dial 

func Dial(network, addr string, config *Config) (*Conn, error)

Dial connects to the given network address using net.Dial and then initiates a TLS handshake, returning the resulting TLS connection. Dial interprets a nil configuration as equivalent to the zero configuration; see the documentation of Config for the defaults.

func DialWithDialer 

func DialWithDialer(dialer *net.Dialer, network, addr string, config *Config) (*Conn, error)

DialWithDialer connects to the given network address using dialer.Dial and then initiates a TLS handshake, returning the resulting TLS connection. Any timeout or deadline given in the dialer apply to connection and TLS handshake as a whole.

DialWithDialer interprets a nil configuration as equivalent to the zero configuration; see the documentation of Config for the defaults.

DialWithDialer uses context.Background internally; to specify the context, use Dialer.DialContext with NetDialer set to the desired dialer.

func Server 

func Server(ctx context.Context, conn net.Conn, config *Config) (*Conn, error)

Server returns a new TLS server side connection using conn as the underlying transport. The configuration config must be non-nil and must include at least one certificate or else set GetCertificate.

func (*Conn) Close 

func (c *Conn) Close() error

Close closes the connection.

func (*Conn) CloseWrite 

func (c *Conn) CloseWrite() error

CloseWrite shuts down the writing side of the connection. It should only be called once the handshake has completed and does not call CloseWrite on the underlying connection. Most callers should just use Conn.Close.

func (*Conn) ConnectionState 

func (c *Conn) ConnectionState() ConnectionState

ConnectionState returns basic TLS details about the connection.

func (*Conn) Handshake 

func (c *Conn) Handshake() error

Handshake runs the client or server handshake protocol if it has not yet been run.

Most uses of this package need not call Handshake explicitly: the first Conn.Read or Conn.Write will call it automatically.

For control over canceling or setting a timeout on a handshake, use Conn.HandshakeContext or the Dialer's DialContext method instead.

In order to avoid denial of service attacks, the maximum RSA key size allowed in certificates sent by either the TLS server or client is limited to 8192 bits. This limit can be overridden by setting tlsmaxrsasize in the GODEBUG environment variable (e.g. GODEBUG=tlsmaxrsasize=4096).

func (*Conn) HandshakeContext 

func (c *Conn) HandshakeContext(ctx context.Context) error

HandshakeContext runs the client or server handshake protocol if it has not yet been run.

The provided Context must be non-nil. If the context is canceled before the handshake is complete, the handshake is interrupted and an error is returned. Once the handshake has completed, cancellation of the context will not affect the connection.

Most uses of this package need not call HandshakeContext explicitly: the first Conn.Read or Conn.Write will call it automatically.

func (*Conn) LocalAddr 

func (c *Conn) LocalAddr() net.Addr

LocalAddr returns the local network address.

func (*Conn) NetConn 

func (c *Conn) NetConn() net.Conn

NetConn returns the underlying connection that is wrapped by c. Note that writing to or reading from this connection directly will corrupt the TLS session.

func (*Conn) OCSPResponse 

func (c *Conn) OCSPResponse() []byte

OCSPResponse returns the stapled OCSP response from the TLS server, if any. (Only valid for client connections.)

func (*Conn) Read 

func (c *Conn) Read(b []byte) (int, error)

Read reads data from the connection.

As Read calls Conn.Handshake, in order to prevent indefinite blocking a deadline must be set for both Read and Conn.Write before Read is called when the handshake has not yet completed. See Conn.SetDeadline, Conn.SetReadDeadline, and Conn.SetWriteDeadline.

func (*Conn) RemoteAddr 

func (c *Conn) RemoteAddr() net.Addr

RemoteAddr returns the remote network address.

func (*Conn) SetDeadline 

func (c *Conn) SetDeadline(t time.Time) error

SetDeadline sets the read and write deadlines associated with the connection. A zero value for t means Conn.Read and Conn.Write will not time out. After a Write has timed out, the TLS state is corrupt and all future writes will return the same error.

func (*Conn) SetReadDeadline 

func (c *Conn) SetReadDeadline(t time.Time) error

SetReadDeadline sets the read deadline on the underlying connection. A zero value for t means Conn.Read will not time out.

func (*Conn) SetWriteDeadline 

func (c *Conn) SetWriteDeadline(t time.Time) error

SetWriteDeadline sets the write deadline on the underlying connection. A zero value for t means Conn.Write will not time out. After a Conn.Write has timed out, the TLS state is corrupt and all future writes will return the same error.

func (*Conn) VerifyHostname 

func (c *Conn) VerifyHostname(host string) error

VerifyHostname checks that the peer certificate chain is valid for connecting to host. If so, it returns nil; if not, it returns an error describing the problem.

func (*Conn) Write 

func (c *Conn) Write(b []byte) (int, error)

Write writes data to the connection.

As Write calls Conn.Handshake, in order to prevent indefinite blocking a deadline must be set for both Conn.Read and Write before Write is called when the handshake has not yet completed. See Conn.SetDeadline, Conn.SetReadDeadline, and Conn.SetWriteDeadline.

type ConnectionState 

type ConnectionState struct {
	// Version is the TLS version used by the connection (e.g. VersionTLS12).
	Version uint16

	// HandshakeComplete is true if the handshake has concluded.
	HandshakeComplete bool

	// DidResume is true if this connection was successfully resumed from a
	// previous session with a session ticket or similar mechanism.
	DidResume bool

	// CipherSuite is the cipher suite negotiated for the connection (e.g.
	// TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_AES_128_GCM_SHA256).
	CipherSuite uint16

	// NegotiatedProtocol is the application protocol negotiated with ALPN.
	NegotiatedProtocol string

	// NegotiatedProtocolIsMutual used to indicate a mutual NPN negotiation.
	//
	// Deprecated: this value is always true.
	NegotiatedProtocolIsMutual bool

	// ServerName is the value of the Server Name Indication extension sent by
	// the client. It's available both on the server and on the client side.
	ServerName string

	// PeerCertificates are the parsed certificates sent by the peer, in the
	// order in which they were sent. The first element is the leaf certificate
	// that the connection is verified against.
	//
	// On the client side, it can't be empty. On the server side, it can be
	// empty if Config.ClientAuth is not RequireAnyClientCert or
	// RequireAndVerifyClientCert.
	//
	// PeerCertificates and its contents should not be modified.
	PeerCertificates []*x509.Certificate

	// VerifiedChains is a list of one or more chains where the first element is
	// PeerCertificates[0] and the last element is from Config.RootCAs (on the
	// client side) or Config.ClientCAs (on the server side).
	//
	// On the client side, it's set if Config.InsecureSkipVerify is false. On
	// the server side, it's set if Config.ClientAuth is VerifyClientCertIfGiven
	// (and the peer provided a certificate) or RequireAndVerifyClientCert.
	//
	// VerifiedChains and its contents should not be modified.
	VerifiedChains [][]*x509.Certificate

	// SignedCertificateTimestamps is a list of SCTs provided by the peer
	// through the TLS handshake for the leaf certificate, if any.
	SignedCertificateTimestamps [][]byte

	// OCSPResponse is a stapled Online Certificate Status Protocol (OCSP)
	// response provided by the peer for the leaf certificate, if any.
	OCSPResponse []byte

	// TLSUnique contains the "tls-unique" channel binding value (see RFC 5929,
	// Section 3). This value will be nil for TLS 1.3 connections and for
	// resumed connections that don't support Extended Master Secret (RFC 7627).
	TLSUnique []byte

	// ECHAccepted indicates if Encrypted Client Hello was offered by the client
	// and accepted by the server. Currently, ECH is supported only on the
	// client side.
	ECHAccepted bool
	// contains filtered or unexported fields
}

ConnectionState records basic TLS details about the connection.

func (*ConnectionState) ExportKeyingMaterial 

func (cs *ConnectionState) ExportKeyingMaterial(label string, context []byte, length int) ([]byte, error)

ExportKeyingMaterial returns length bytes of exported key material in a new slice as defined in RFC 5705. If context is nil, it is not used as part of the seed. If the connection was set to allow renegotiation via Config.Renegotiation, or if the connections supports neither TLS 1.3 nor Extended Master Secret, this function will return an error.

Exporting key material without Extended Master Secret or TLS 1.3 was disabled in Go 1.22 due to security issues (see the Security Considerations sections of RFC 5705 and RFC 7627), but can be re-enabled with the GODEBUG setting tlsunsafeekm=1.

type CurveID 

type CurveID uint16

CurveID is the type of a TLS identifier for a key exchange mechanism. See https://www.iana.org/assignments/tls-parameters/tls-parameters.xml#tls-parameters-8.

In TLS 1.2, this registry used to support only elliptic curves. In TLS 1.3, it was extended to other groups and renamed NamedGroup. See RFC 8446, Section 4.2.7. It was then also extended to other mechanisms, such as hybrid post-quantum KEMs. 

const (
	CurveP256 CurveID = 23
	CurveP384 CurveID = 24
	CurveP521 CurveID = 25
	X25519    CurveID = 29
)

func (CurveID) String 

func (i CurveID) String() string

type Dialer 

type Dialer struct {
	// NetDialer is the optional dialer to use for the TLS connections'
	// underlying TCP connections.
	// A nil NetDialer is equivalent to the net.Dialer zero value.
	NetDialer *net.Dialer

	// Config is the TLS configuration to use for new connections.
	// A nil configuration is equivalent to the zero
	// configuration; see the documentation of Config for the
	// defaults.
	Config *Config
}

Dialer dials TLS connections given a configuration and a Dialer for the underlying connection.

func (*Dialer) Dial 

func (d *Dialer) Dial(network, addr string) (net.Conn, error)

Dial connects to the given network address and initiates a TLS handshake, returning the resulting TLS connection.

The returned Conn, if any, will always be of type *Conn.

Dial uses context.Background internally; to specify the context, use Dialer.DialContext.

func (*Dialer) DialContext 

func (d *Dialer) DialContext(ctx context.Context, network, addr string) (net.Conn, error)

DialContext connects to the given network address and initiates a TLS handshake, returning the resulting TLS connection.

The provided Context must be non-nil. If the context expires before the connection is complete, an error is returned. Once successfully connected, any expiration of the context will not affect the connection.

The returned Conn, if any, will always be of type *Conn.

type ECHRejectionError 

type ECHRejectionError struct {
	RetryConfigList []byte
}

ECHRejectionError is the error type returned when ECH is rejected by a remote server. If the server offered a ECHConfigList to use for retries, the RetryConfigList field will contain this list.

The client may treat an ECHRejectionError with an empty set of RetryConfigs as a secure signal from the server.

func (*ECHRejectionError) Error 

func (e *ECHRejectionError) Error() string

type MirrorConn 

type MirrorConn struct {
	*sync.Mutex
	net.Conn
	Target net.Conn
}

func (*MirrorConn) Close 

func (c *MirrorConn) Close() error

func (*MirrorConn) Read 

func (c *MirrorConn) Read(b []byte) (int, error)

func (*MirrorConn) SetDeadline 

func (c *MirrorConn) SetDeadline(t time.Time) error

func (*MirrorConn) SetReadDeadline 

func (c *MirrorConn) SetReadDeadline(t time.Time) error

func (*MirrorConn) SetWriteDeadline 

func (c *MirrorConn) SetWriteDeadline(t time.Time) error

func (*MirrorConn) Write 

func (c *MirrorConn) Write(b []byte) (int, error)

type QUICConfig 

type QUICConfig struct {
	TLSConfig *Config

	// EnableSessionEvents may be set to true to enable the
	// [QUICStoreSession] and [QUICResumeSession] events for client connections.
	// When this event is enabled, sessions are not automatically
	// stored in the client session cache.
	// The application should use [QUICConn.StoreSession] to store sessions.
	EnableSessionEvents bool
}

A QUICConfig configures a QUICConn.

type QUICConn 

type QUICConn struct {
	// contains filtered or unexported fields
}

A QUICConn represents a connection which uses a QUIC implementation as the underlying transport as described in RFC 9001.

Methods of QUICConn are not safe for concurrent use.

func QUICClient 

func QUICClient(config *QUICConfig) *QUICConn

QUICClient returns a new TLS client side connection using QUICTransport as the underlying transport. The config cannot be nil.

The config's MinVersion must be at least TLS 1.3.

func QUICServer 

func QUICServer(config *QUICConfig) *QUICConn

QUICServer returns a new TLS server side connection using QUICTransport as the underlying transport. The config cannot be nil.

The config's MinVersion must be at least TLS 1.3.

func (*QUICConn) Close 

func (q *QUICConn) Close() error

Close closes the connection and stops any in-progress handshake.

func (*QUICConn) ConnectionState 

func (q *QUICConn) ConnectionState() ConnectionState

ConnectionState returns basic TLS details about the connection.

func (*QUICConn) HandleData 

func (q *QUICConn) HandleData(level QUICEncryptionLevel, data []byte) error

HandleData handles handshake bytes received from the peer. It may produce connection events, which may be read with QUICConn.NextEvent.

func (*QUICConn) NextEvent 

func (q *QUICConn) NextEvent() QUICEvent

NextEvent returns the next event occurring on the connection. It returns an event with a Kind of QUICNoEvent when no events are available.

func (*QUICConn) SendSessionTicket 

func (q *QUICConn) SendSessionTicket(opts QUICSessionTicketOptions) error

SendSessionTicket sends a session ticket to the client. It produces connection events, which may be read with QUICConn.NextEvent. Currently, it can only be called once.

func (*QUICConn) SetTransportParameters 

func (q *QUICConn) SetTransportParameters(params []byte)

SetTransportParameters sets the transport parameters to send to the peer.

Server connections may delay setting the transport parameters until after receiving the client's transport parameters. See QUICTransportParametersRequired.

func (*QUICConn) Start 

func (q *QUICConn) Start(ctx context.Context) error

Start starts the client or server handshake protocol. It may produce connection events, which may be read with QUICConn.NextEvent.

Start must be called at most once.

func (*QUICConn) StoreSession 

func (q *QUICConn) StoreSession(session *SessionState) error

StoreSession stores a session previously received in a QUICStoreSession event in the ClientSessionCache. The application may process additional events or modify the SessionState before storing the session.

type QUICEncryptionLevel 

type QUICEncryptionLevel int

QUICEncryptionLevel represents a QUIC encryption level used to transmit handshake messages.

func (QUICEncryptionLevel) String 

func (l QUICEncryptionLevel) String() string

type QUICEvent 

type QUICEvent struct {
	Kind QUICEventKind

	// Set for QUICSetReadSecret, QUICSetWriteSecret, and QUICWriteData.
	Level QUICEncryptionLevel

	// Set for QUICTransportParameters, QUICSetReadSecret, QUICSetWriteSecret, and QUICWriteData.
	// The contents are owned by crypto/tls, and are valid until the next NextEvent call.
	Data []byte

	// Set for QUICSetReadSecret and QUICSetWriteSecret.
	Suite uint16

	// Set for QUICResumeSession and QUICStoreSession.
	SessionState *SessionState
}

A QUICEvent is an event occurring on a QUIC connection.

The type of event is specified by the Kind field. The contents of the other fields are kind-specific.

type QUICEventKind 

type QUICEventKind int

A QUICEventKind is a type of operation on a QUIC connection. 

const (
	// QUICNoEvent indicates that there are no events available.
	QUICNoEvent QUICEventKind = iota

	// QUICSetReadSecret and QUICSetWriteSecret provide the read and write
	// secrets for a given encryption level.
	// QUICEvent.Level, QUICEvent.Data, and QUICEvent.Suite are set.
	//
	// Secrets for the Initial encryption level are derived from the initial
	// destination connection ID, and are not provided by the QUICConn.
	QUICSetReadSecret
	QUICSetWriteSecret

	// QUICWriteData provides data to send to the peer in CRYPTO frames.
	// QUICEvent.Data is set.
	QUICWriteData

	// QUICTransportParameters provides the peer's QUIC transport parameters.
	// QUICEvent.Data is set.
	QUICTransportParameters

	// QUICTransportParametersRequired indicates that the caller must provide
	// QUIC transport parameters to send to the peer. The caller should set
	// the transport parameters with QUICConn.SetTransportParameters and call
	// QUICConn.NextEvent again.
	//
	// If transport parameters are set before calling QUICConn.Start, the
	// connection will never generate a QUICTransportParametersRequired event.
	QUICTransportParametersRequired

	// QUICRejectedEarlyData indicates that the server rejected 0-RTT data even
	// if we offered it. It's returned before QUICEncryptionLevelApplication
	// keys are returned.
	// This event only occurs on client connections.
	QUICRejectedEarlyData

	// QUICHandshakeDone indicates that the TLS handshake has completed.
	QUICHandshakeDone

	// QUICResumeSession indicates that a client is attempting to resume a previous session.
	// [QUICEvent.SessionState] is set.
	//
	// For client connections, this event occurs when the session ticket is selected.
	// For server connections, this event occurs when receiving the client's session ticket.
	//
	// The application may set [QUICEvent.SessionState.EarlyData] to false before the
	// next call to [QUICConn.NextEvent] to decline 0-RTT even if the session supports it.
	QUICResumeSession

	// QUICStoreSession indicates that the server has provided state permitting
	// the client to resume the session.
	// [QUICEvent.SessionState] is set.
	// The application should use [QUICConn.StoreSession] session to store the [SessionState].
	// The application may modify the [SessionState] before storing it.
	// This event only occurs on client connections.
	QUICStoreSession
)

type QUICSessionTicketOptions 

type QUICSessionTicketOptions struct {
	// EarlyData specifies whether the ticket may be used for 0-RTT.
	EarlyData bool
	Extra     [][]byte
}

type RecordHeaderError 

type RecordHeaderError struct {
	// Msg contains a human readable string that describes the error.
	Msg string
	// RecordHeader contains the five bytes of TLS record header that
	// triggered the error.
	RecordHeader [5]byte
	// Conn provides the underlying net.Conn in the case that a client
	// sent an initial handshake that didn't look like TLS.
	// It is nil if there's already been a handshake or a TLS alert has
	// been written to the connection.
	Conn net.Conn
}

RecordHeaderError is returned when a TLS record header is invalid.

func (RecordHeaderError) Error 

func (e RecordHeaderError) Error() string

type RenegotiationSupport 

type RenegotiationSupport int

RenegotiationSupport enumerates the different levels of support for TLS renegotiation. TLS renegotiation is the act of performing subsequent handshakes on a connection after the first. This significantly complicates the state machine and has been the source of numerous, subtle security issues. Initiating a renegotiation is not supported, but support for accepting renegotiation requests may be enabled.

Even when enabled, the server may not change its identity between handshakes (i.e. the leaf certificate must be the same). Additionally, concurrent handshake and application data flow is not permitted so renegotiation can only be used with protocols that synchronise with the renegotiation, such as HTTPS.

Renegotiation is not defined in TLS 1.3. 

const (
	// RenegotiateNever disables renegotiation.
	RenegotiateNever RenegotiationSupport = iota

	// RenegotiateOnceAsClient allows a remote server to request
	// renegotiation once per connection.
	RenegotiateOnceAsClient

	// RenegotiateFreelyAsClient allows a remote server to repeatedly
	// request renegotiation.
	RenegotiateFreelyAsClient
)

type SessionState 

type SessionState struct {

	// Extra is ignored by crypto/tls, but is encoded by [SessionState.Bytes]
	// and parsed by [ParseSessionState].
	//
	// This allows [Config.UnwrapSession]/[Config.WrapSession] and
	// [ClientSessionCache] implementations to store and retrieve additional
	// data alongside this session.
	//
	// To allow different layers in a protocol stack to share this field,
	// applications must only append to it, not replace it, and must use entries
	// that can be recognized even if out of order (for example, by starting
	// with an id and version prefix).
	Extra [][]byte

	// EarlyData indicates whether the ticket can be used for 0-RTT in a QUIC
	// connection. The application may set this to false if it is true to
	// decline to offer 0-RTT even if supported.
	EarlyData bool
	// contains filtered or unexported fields
}

A SessionState is a resumable session.

func ParseSessionState 

func ParseSessionState(data []byte) (*SessionState, error)

ParseSessionState parses a SessionState encoded by SessionState.Bytes.

func (*SessionState) Bytes 

func (s *SessionState) Bytes() ([]byte, error)

Bytes encodes the session, including any private fields, so that it can be parsed by ParseSessionState. The encoding contains secret values critical to the security of future and possibly past sessions.

The specific encoding should be considered opaque and may change incompatibly between Go versions.

type SignatureScheme 

type SignatureScheme uint16

SignatureScheme identifies a signature algorithm supported by TLS. See RFC 8446, Section 4.2.3. 

const (
	// RSASSA-PKCS1-v1_5 algorithms.
	PKCS1WithSHA256 SignatureScheme = 0x0401
	PKCS1WithSHA384 SignatureScheme = 0x0501
	PKCS1WithSHA512 SignatureScheme = 0x0601

	// RSASSA-PSS algorithms with public key OID rsaEncryption.
	PSSWithSHA256 SignatureScheme = 0x0804
	PSSWithSHA384 SignatureScheme = 0x0805
	PSSWithSHA512 SignatureScheme = 0x0806

	// ECDSA algorithms. Only constrained to a specific curve in TLS 1.3.
	ECDSAWithP256AndSHA256 SignatureScheme = 0x0403
	ECDSAWithP384AndSHA384 SignatureScheme = 0x0503
	ECDSAWithP521AndSHA512 SignatureScheme = 0x0603

	// EdDSA algorithms.
	Ed25519 SignatureScheme = 0x0807

	// Legacy signature and hash algorithms for TLS 1.2.
	PKCS1WithSHA1 SignatureScheme = 0x0201
	ECDSAWithSHA1 SignatureScheme = 0x0203
)

func (SignatureScheme) String 

func (i SignatureScheme) String() string

Notes

Bugs

Source Files

View all Source files

Directories

Path Synopsis
Package byteorder provides functions for decoding and encoding little and big endian integer types from/to byte slices.
 Package byteorder provides functions for decoding and encoding little and big endian integer types from/to byte slices.
Package mlkem768 implements the quantum-resistant key encapsulation method ML-KEM (formerly known as Kyber).
 Package mlkem768 implements the quantum-resistant key encapsulation method ML-KEM (formerly known as Kyber).

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