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package guestidentity
import (
"fmt"
"net/url"
"regexp"
"strings"
"github.com/johnandersen777/socialweb-computer-kcp/internal/openbaoctl"
)
const (
KCPAPI = "guest-kcp"
EntityPrefix = "guest-"
VaultTokenHeader = "X-Vault-Token"
OIDCIssuerPath = "/v1/identity/oidc"
OIDCSubjectClaim = "wid_sub"
OnNetworkScope = "on-network"
)
var (
computeVMNameRE = regexp.MustCompile(`^[A-Za-z0-9][A-Za-z0-9._-]*$`)
roleNameRE = regexp.MustCompile(`^guest-[A-Za-z0-9][A-Za-z0-9._-]*-[0-9a-f]{16}$`)
authMountName = regexp.MustCompile(`^[a-z0-9][a-z0-9-]*$`)
)
type Audience struct {
API string
Actx string
}
func (a Audience) String() string { return openbaoctl.GuestAudience(a.API, a.Actx) }
func GuestAudience(api, actx string) string { return openbaoctl.GuestAudience(api, actx) }
func OIDCIssuer(ingressURL string) string {
return strings.TrimRight(ingressURL, "/") + OIDCIssuerPath
}
func ParseAudience(aud string) (Audience, error) {
rest, ok := strings.CutPrefix(strings.TrimSpace(aud), "api://")
if !ok {
return Audience{}, fmt.Errorf("guestidentity: audience %q does not name an api", aud)
}
api, query, ok := strings.Cut(rest, "?")
if !ok || api == "" {
return Audience{}, fmt.Errorf("guestidentity: audience %q is not api://<api>?actx=<context>", aud)
}
if !validAPI(api) {
return Audience{}, fmt.Errorf("guestidentity: audience %q names an api that is not one", aud)
}
values, err := url.ParseQuery(query)
if err != nil || len(values) != 1 || len(values["actx"]) != 1 {
return Audience{}, fmt.Errorf("guestidentity: audience %q does not carry exactly an actx", aud)
}
actx := values["actx"][0]
if !validActx(actx) {
return Audience{}, fmt.Errorf("guestidentity: audience %q names an actx that is not one", aud)
}
return Audience{API: api, Actx: actx}, nil
}
func validAPI(api string) bool {
return api != "" && !strings.ContainsAny(api, "?/ #&=\"{}'")
}
func validActx(actx string) bool {
return actx != "" && !strings.ContainsAny(actx, "? #&=\"{}'")
}
func ValidComputeVM(name string) bool { return len(name) <= 201 && computeVMNameRE.MatchString(name) }
func ValidRole(role string) bool { return len(role) <= 224 && roleNameRE.MatchString(role) }
func Entity(computevm string) string { return EntityPrefix + computevm }
func Role(computevm, audience string) string {
return openbaoctl.GuestRoleName(Entity(computevm), audience)
}
func ValidMount(mount string) bool { return len(mount) <= 63 && authMountName.MatchString(mount) }
