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package main
import (
"bufio"
"context"
"fmt"
"io"
"log"
"time"
"github.com/spiffe/go-spiffe/v2/spiffeid"
"github.com/spiffe/go-spiffe/v2/spiffetls"
"github.com/spiffe/go-spiffe/v2/spiffetls/tlsconfig"
"github.com/spiffe/go-spiffe/v2/workloadapi"
)
const (
socketPath = "unix:///tmp/agent.sock"
serverAddress = "localhost:55555"
)
func main() {
if err := run(context.Background()); err != nil {
log.Fatal(err)
}
}
func run(ctx context.Context) error {
ctx, cancel := context.WithTimeout(ctx, 3*time.Second)
defer cancel()
// Allowed SPIFFE ID
serverID := spiffeid.RequireFromString("spiffe://example.org/server")
// Create a TLS connection.
// The client expects the server to present an SVID with the spiffeID: 'spiffe://example.org/server'
//
// An alternative when creating Dial is using `spiffetls.Dial` that uses environment variable `SPIFFE_ENDPOINT_SOCKET`
conn, err := spiffetls.DialWithMode(ctx, "tcp", serverAddress,
spiffetls.MTLSClientWithSourceOptions(
tlsconfig.AuthorizeID(serverID),
workloadapi.WithClientOptions(workloadapi.WithAddr(socketPath)),
))
if err != nil {
return fmt.Errorf("unable to create TLS connection: %w", err)
}
defer conn.Close()
// Send a message to the server using the TLS connection
fmt.Fprintf(conn, "Hello server\n")
// Read server response
status, err := bufio.NewReader(conn).ReadString('\n')
if err != nil && err != io.EOF {
return fmt.Errorf("unable to read server response: %w", err)
}
log.Printf("Server says: %q", status)
return nil
}
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