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1df0f8912a
It may be desirable to check that a config is valid without checking for the existence of certificate files (e.g. when validating a config inside a sandbox without access to the cert files). This will be very useful for NixOS so that we can check the config file at nix-build time (e.g. potentially without proper permissions to read cert files for a TLS connection). fixes https://github.com/zrepl/zrepl/issues/467 closes https://github.com/zrepl/zrepl/pull/587
57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
package tls
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import (
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"context"
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"crypto/tls"
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"net"
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"github.com/pkg/errors"
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"github.com/zrepl/zrepl/config"
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"github.com/zrepl/zrepl/tlsconf"
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"github.com/zrepl/zrepl/transport"
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)
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type TLSConnecter struct {
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Address string
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dialer net.Dialer
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tlsConfig *tls.Config
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}
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func TLSConnecterFromConfig(in *config.TLSConnect, parseFlags config.ParseFlags) (*TLSConnecter, error) {
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dialer := net.Dialer{
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Timeout: in.DialTimeout,
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}
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if parseFlags&config.ParseFlagsNoCertCheck != 0 {
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return &TLSConnecter{in.Address, dialer, nil}, nil
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}
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ca, err := tlsconf.ParseCAFile(in.Ca)
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if err != nil {
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return nil, errors.Wrap(err, "cannot parse ca file")
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}
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cert, err := tls.LoadX509KeyPair(in.Cert, in.Key)
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if err != nil {
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return nil, errors.Wrap(err, "cannot parse cert/key pair")
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}
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tlsConfig, err := tlsconf.ClientAuthClient(in.ServerCN, ca, cert)
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if err != nil {
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return nil, errors.Wrap(err, "cannot build tls config")
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}
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return &TLSConnecter{in.Address, dialer, tlsConfig}, nil
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}
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func (c *TLSConnecter) Connect(dialCtx context.Context) (transport.Wire, error) {
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conn, err := c.dialer.DialContext(dialCtx, "tcp", c.Address)
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if err != nil {
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return nil, err
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}
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tcpConn := conn.(*net.TCPConn)
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tlsConn := tls.Client(conn, c.tlsConfig)
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return newWireAdaptor(tlsConn, tcpConn), nil
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}
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