From 1e7b42fa549a05c1b844380f1f918c2f42112700 Mon Sep 17 00:00:00 2001 From: Elara Musayelyan Date: Tue, 29 Aug 2023 17:39:17 -0700 Subject: [PATCH] Initial Commit --- README.md | 7 ++++ go.mod | 19 ++++++++++ go.sum | 76 ++++++++++++++++++++++++++++++++++++++ quicutil.go | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 206 insertions(+) create mode 100644 README.md create mode 100644 go.mod create mode 100644 go.sum create mode 100644 quicutil.go diff --git a/README.md b/README.md new file mode 100644 index 0000000..6efabbe --- /dev/null +++ b/README.md @@ -0,0 +1,7 @@ +# quicutil + +quicutil is a simple package that provides convenience functions that generate self-signed certificates for QUIC connections that don't require PKI, such as trusted connections over a local network, or connections where a different verification mechanism is used. + +Connections and servers created by this package are encrypted but not secure. They may be vulnerable to MitM attacks if a separate verification mechanism isn't used. + +**Do not use this in production for applications where PKI is needed, such as for public websites!** \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..59c436d --- /dev/null +++ b/go.mod @@ -0,0 +1,19 @@ +module go.elara.ws/quicutil + +go 1.21.0 + +require github.com/quic-go/quic-go v0.38.1 + +require ( + github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 // indirect + github.com/golang/mock v1.6.0 // indirect + github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect + github.com/onsi/ginkgo/v2 v2.9.5 // indirect + github.com/quic-go/qtls-go1-20 v0.3.3 // indirect + golang.org/x/crypto v0.4.0 // indirect + golang.org/x/exp v0.0.0-20221205204356-47842c84f3db // indirect + golang.org/x/mod v0.10.0 // indirect + golang.org/x/net v0.10.0 // indirect + golang.org/x/sys v0.8.0 // indirect + golang.org/x/tools v0.9.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..56be004 --- /dev/null +++ b/go.sum @@ -0,0 +1,76 @@ +github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI= +github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI= +github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/go-logr/logr v1.2.4 h1:g01GSCwiDw2xSZfjJ2/T9M+S6pFdcNtFYsp+Y43HYDQ= +github.com/go-logr/logr v1.2.4/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A= +github.com/go-task/slim-sprig v0.0.0-20230315185526-52ccab3ef572 h1:tfuBGBXKqDEevZMzYi5KSi8KkcZtzBcTgAUUtapy0OI= 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v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/quicutil.go b/quicutil.go new file mode 100644 index 0000000..f028ba7 --- /dev/null +++ b/quicutil.go @@ -0,0 +1,104 @@ +// Package quicutil provides convenience functions that generate self-signed +// certificates for QUIC connections that don't require PKI, such as trusted +// connections over a local network, or connections where a different +// verification mechanism is used. +// +// Do not use this for applications where PKI is needed, such as for public +// websites! +package quicutil + +import ( + "context" + "crypto/ed25519" + "crypto/rand" + "crypto/tls" + "crypto/x509" + "crypto/x509/pkix" + "encoding/pem" + "math/big" + "net" + "time" + + "github.com/quic-go/quic-go" +) + +// Listen generates a new self-signed certificate and then listens +// for QUIC connections on a given net.PacketConn. +func Listen(conn net.PacketConn, config *quic.Config) (*quic.Listener, error) { + tlsConf, err := GenerateSelfSignedCert() + if err != nil { + return nil, err + } + return quic.Listen(conn, tlsConf, config) +} + +// ListenAddr generates a new self-signed certificate and then listens +// for QUIC connections on a given address. +func ListenAddr(addr string, config *quic.Config) (*quic.Listener, error) { + tlsConf, err := GenerateSelfSignedCert() + if err != nil { + return nil, err + } + return quic.ListenAddr(addr, tlsConf, config) +} + +// DialAddr establishes a new insecure QUIC connection to a server using a net.PacketConn. +func Dial(ctx context.Context, conn net.PacketConn, addr net.Addr, config *quic.Config) (quic.Connection, error) { + return quic.Dial(ctx, conn, addr, &tls.Config{InsecureSkipVerify: true}, config) +} + +// DialAddr establishes a new insecure QUIC connection to a server. +func DialAddr(ctx context.Context, addr string, config *quic.Config) (quic.Connection, error) { + return quic.DialAddr(ctx, addr, &tls.Config{InsecureSkipVerify: true}, config) +} + +// GenerateSelfSignedCert generates a new self-signed Ed25519 TLS certificate. +func GenerateSelfSignedCert() (*tls.Config, error) { + // Generate a new Ed25519 key + pubkey, privkey, err := ed25519.GenerateKey(rand.Reader) + if err != nil { + return nil, err + } + + // Generate a self-signed certificate template + certTemplate := x509.Certificate{ + SerialNumber: big.NewInt(1), + Subject: pkix.Name{ + Organization: []string{"Self-Signed Certificate"}, + }, + NotBefore: time.Now(), + NotAfter: time.Date(9999, time.December, 31, 23, 59, 0, 0, time.UTC), // Valid until 31 December 9999 23:59 UTC + KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature, + ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth}, + BasicConstraintsValid: true, + } + + // Generate the certificate + certDER, err := x509.CreateCertificate(rand.Reader, &certTemplate, &certTemplate, pubkey, privkey) + if err != nil { + return nil, err + } + + // Convert private key to PKCS #8 form + keyData, err := x509.MarshalPKCS8PrivateKey(privkey) + if err != nil { + return nil, err + } + + // Create PEM-encoded certificate and private key blocks + certPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certDER}) + keyPEM := pem.EncodeToMemory(&pem.Block{Type: "ED25519 PRIVATE KEY", Bytes: keyData}) + + // Create a new TLS certificate and key pair from the PEM-encoded data + tlsCert, err := tls.X509KeyPair(certPEM, keyPEM) + if err != nil { + return nil, err + } + + // Create and configure a TLS config + tlsConfig := &tls.Config{ + Certificates: []tls.Certificate{tlsCert}, + } + + return tlsConfig, nil +}