74 lines
1.7 KiB
Go
74 lines
1.7 KiB
Go
package handshake
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import (
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"bytes"
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"crypto/rand"
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"github.com/lucas-clemente/quic-go/internal/crypto"
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)
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// ServerConfig is a server config
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type ServerConfig struct {
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kex crypto.KeyExchange
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certChain crypto.CertChain
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ID []byte
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obit []byte
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cookieGenerator *CookieGenerator
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}
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// NewServerConfig creates a new server config
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func NewServerConfig(kex crypto.KeyExchange, certChain crypto.CertChain) (*ServerConfig, error) {
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id := make([]byte, 16)
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_, err := rand.Read(id)
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if err != nil {
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return nil, err
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}
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obit := make([]byte, 8)
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if _, err = rand.Read(obit); err != nil {
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return nil, err
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}
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cookieGenerator, err := NewCookieGenerator()
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if err != nil {
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return nil, err
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}
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return &ServerConfig{
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kex: kex,
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certChain: certChain,
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ID: id,
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obit: obit,
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cookieGenerator: cookieGenerator,
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}, nil
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}
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// Get the server config binary representation
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func (s *ServerConfig) Get() []byte {
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var serverConfig bytes.Buffer
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msg := HandshakeMessage{
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Tag: TagSCFG,
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Data: map[Tag][]byte{
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TagSCID: s.ID,
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TagKEXS: []byte("C255"),
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TagAEAD: []byte("AESG"),
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TagPUBS: append([]byte{0x20, 0x00, 0x00}, s.kex.PublicKey()...),
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TagOBIT: s.obit,
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TagEXPY: {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
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},
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}
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msg.Write(&serverConfig)
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return serverConfig.Bytes()
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}
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// Sign the server config and CHLO with the server's keyData
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func (s *ServerConfig) Sign(sni string, chlo []byte) ([]byte, error) {
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return s.certChain.SignServerProof(sni, chlo, s.Get())
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}
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// GetCertsCompressed returns the certificate data
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func (s *ServerConfig) GetCertsCompressed(sni string, commonSetHashes, compressedHashes []byte) ([]byte, error) {
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return s.certChain.GetCertsCompressed(sni, commonSetHashes, compressedHashes)
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}
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