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package keyline
import (
"errors"
"fmt"
"path"
"regexp"
"strings"
"gitlab.com/gitlab-org/gitlab-shell/v14/internal/config"
"gitlab.com/gitlab-org/gitlab-shell/v14/internal/executable"
)
var (
keyRegex = regexp.MustCompile(`\A[a-z0-9-]+\z`)
)
const (
PublicKeyPrefix = "key"
PrincipalPrefix = "username"
SshOptions = "no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty"
)
type KeyLine struct {
Id string // This can be either an ID of a Key or username
Value string // This can be either a public key or a principal name
Prefix string
Config *config.Config
}
func NewPublicKeyLine(id, publicKey string, config *config.Config) (*KeyLine, error) {
return newKeyLine(id, publicKey, PublicKeyPrefix, config)
}
func NewPrincipalKeyLine(keyId, principal string, config *config.Config) (*KeyLine, error) {
return newKeyLine(keyId, principal, PrincipalPrefix, config)
}
func (k *KeyLine) ToString() string {
command := fmt.Sprintf("%s %s-%s", path.Join(k.Config.RootDir, executable.BinDir, executable.GitlabShell), k.Prefix, k.Id)
return fmt.Sprintf(`command="%s",%s %s`, command, SshOptions, k.Value)
}
func newKeyLine(id, value, prefix string, config *config.Config) (*KeyLine, error) {
if err := validate(id, value); err != nil {
return nil, err
}
return &KeyLine{Id: id, Value: value, Prefix: prefix, Config: config}, nil
}
func validate(id string, value string) error {
if !keyRegex.MatchString(id) {
return errors.New(fmt.Sprintf("Invalid key_id: %s", id))
}
if strings.Contains(value, "\n") {
return errors.New(fmt.Sprintf("Invalid value: %s", value))
}
return nil
}
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