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package spiffetls
import (
"crypto/tls"
"net"
"github.com/spiffe/go-spiffe/v2/spiffeid"
"github.com/spiffe/go-spiffe/v2/svid/x509svid"
)
type PeerIDGetter interface {
PeerID() (spiffeid.ID, error)
}
// PeerIDFromConn returns the peer ID from a server or client peer connection.
// The handshake must have been completed. Note that in Go's TLS stack, the TLS
// 1.3 handshake may not complete until the first read from the connection.
func PeerIDFromConn(conn net.Conn) (spiffeid.ID, error) {
if getter, ok := conn.(PeerIDGetter); ok {
return getter.PeerID()
}
return spiffeid.ID{}, spiffetlsErr.New("connection does not expose peer ID")
}
func PeerIDFromConnectionState(state tls.ConnectionState) (spiffeid.ID, error) {
// The connection state unfortunately does not have VerifiedChains set
// because SPIFFE TLS does custom verification, i.e., Go's TLS stack only
// sets VerifiedChains if it is the one to verify the chain of trust. The
// SPIFFE ID must be extracted from the peer certificates.
if len(state.PeerCertificates) == 0 {
return spiffeid.ID{}, spiffetlsErr.New("no peer certificates")
}
id, err := x509svid.IDFromCert(state.PeerCertificates[0])
if err != nil {
return spiffeid.ID{}, spiffetlsErr.New("invalid peer certificate: %w", err)
}
return id, nil
}
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