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// Package wireguard implements a few helpers for the WireGuard protocol
package wireguard
import (
"fmt"
"regexp"
"github.com/go-errors/errors"
"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
)
// GenerateKey generates a WireGuard private key using wgctrl
// It returns an error if key generation failed.
func GenerateKey() (wgtypes.Key, error) {
key, err := wgtypes.GeneratePrivateKey()
if err != nil {
return key, errors.WrapPrefix(err, "failed generating WireGuard key", 0)
}
return key, nil
}
// ConfigAddKey takes the WireGuard configuration and adds the PrivateKey to the right section
// FIXME: Instead of doing a regex replace, decide if we should use a parser.
func ConfigAddKey(config string, key wgtypes.Key) string {
interfaceSection := "[Interface]"
InterfaceSectionEscaped := regexp.QuoteMeta(interfaceSection)
// (?m) enables multi line mode
// ^ match from beginning of line
// $ match till end of line
// So it matches [Interface] section exactly
InterfaceRe := regexp.MustCompile(fmt.Sprintf("(?m)^%s$", InterfaceSectionEscaped))
toReplace := fmt.Sprintf("%s\nPrivateKey = %s", interfaceSection, key.String())
return InterfaceRe.ReplaceAllString(config, toReplace)
}
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