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// Copyright (c) 2020, Control Command Inc. All rights reserved.
// Copyright (c) 2019, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package util
import (
"fmt"
"net"
"net/url"
)
const (
hkpPort = "11371"
)
const (
httpScheme = "http"
httpsScheme = "https"
hkpScheme = "hkp"
hkpsScheme = "hkps"
)
// NormalizeKeyserverURI is normalizing a URI string by converting
// protocol scheme hkp:// and hkps:// to their corresponding http://
// and https:// protocol scheme and returns the parsed URI with the
// corresponding scheme.
func NormalizeKeyserverURI(uri string) (*url.URL, error) {
u, err := url.Parse(uri)
if err != nil {
return nil, err
}
switch u.Scheme {
case httpScheme, httpsScheme:
case hkpScheme:
u.Scheme = httpScheme
if u.Port() == "" {
u.Host = net.JoinHostPort(u.Hostname(), hkpPort)
}
case hkpsScheme:
u.Scheme = httpsScheme
default:
return nil, fmt.Errorf("unsupported keyserver protocol scheme %q", u.Scheme)
}
return u, nil
}
// SameKeyserver returns if two URIs point to the same keyserver or not, URI are
// also normalized meaning by example that hkp://localhost is equivalent to
// http://localhost:11371.
func SameKeyserver(u1, u2 string) bool {
uri1, err := NormalizeKeyserverURI(u1)
if err != nil {
return false
}
uri2, err := NormalizeKeyserverURI(u2)
if err != nil {
return false
}
return Equal(uri1, uri2)
}
// SameURI returns if two URIs point to the same service or not.
func SameURI(u1, u2 string) bool {
uri1, err := url.Parse(u1)
if err != nil {
return false
}
uri2, err := url.Parse(u2)
if err != nil {
return false
}
return Equal(uri1, uri2)
}
// Equal returns if both URLs have the same hostname, port and scheme or not.
func Equal(u1, u2 *url.URL) bool {
if u1.Host == "" || u2.Host == "" {
return false
}
return u1.Host == u2.Host && u1.Scheme == u2.Scheme
}
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