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package guestidentity
import (
"crypto/sha256"
"encoding/hex"
"encoding/json"
"sort"
"github.com/johnandersen777/socialweb-computer-kcp/api/v1alpha1"
)
type RBACRecord struct {
Roles map[string]RBACRole `json:"roles,omitempty"`
}
type RBACRole struct {
RoleName string `json:"role_name,omitempty"`
Definition RBACRoleDefinition `json:"definition"`
}
type RBACRoleDefinition struct {
Iss string `json:"iss,omitempty"`
Aud string `json:"aud,omitempty"`
Sub string `json:"sub"`
Policies []string `json:"policies,omitempty"`
}
type GrantWish struct {
API string
Actx string
Scopes []string
Claims []v1alpha1.GuestIdentityClaim
}
func (w GrantWish) Audience() string { return GuestAudience(w.API, w.Actx) }
func OwnWish(computevm string) GrantWish {
return GrantWish{API: KCPAPI, Actx: computevm, Scopes: []string{OnNetworkScope}}
}
func Wishes(computevm string, records []RBACRecord, issuer, subject string) []GrantWish {
byAudience := map[string]GrantWish{}
add := func(w GrantWish) {
key := w.Audience()
held, ok := byAudience[key]
if !ok {
held = GrantWish{API: w.API, Actx: w.Actx, Claims: append([]v1alpha1.GuestIdentityClaim(nil), w.Claims...)}
}
for _, scope := range w.Scopes {
if !contains(held.Scopes, scope) {
held.Scopes = append(held.Scopes, scope)
}
}
byAudience[key] = held
}
add(OwnWish(computevm))
for _, wish := range WishesFromRBAC(records, issuer, subject) {
add(wish)
}
out := make([]GrantWish, 0, len(byAudience))
for _, wish := range byAudience {
sort.Strings(wish.Scopes)
sort.Slice(wish.Claims, func(i, j int) bool { return wish.Claims[i].Name < wish.Claims[j].Name })
out = append(out, wish)
}
sort.Slice(out, func(i, j int) bool { return out[i].Audience() < out[j].Audience() })
return out
}
func WishesFromRBAC(records []RBACRecord, issuer, subject string) []GrantWish {
byAudience := map[string]GrantWish{}
for _, record := range records {
for _, role := range record.Roles {
def := role.Definition
if def.Sub != subject {
continue
}
if def.Iss != "" && def.Iss != issuer {
continue
}
audience, err := ParseAudience(def.Aud)
if err != nil {
continue
}
key := audience.String()
wish, ok := byAudience[key]
if !ok {
wish = GrantWish{API: audience.API, Actx: audience.Actx,
Claims: []v1alpha1.GuestIdentityClaim{{Name: OIDCSubjectClaim, Value: subject}}}
}
for _, policy := range def.Policies {
if !contains(wish.Scopes, policy) {
wish.Scopes = append(wish.Scopes, policy)
}
}
byAudience[key] = wish
}
}
out := make([]GrantWish, 0, len(byAudience))
for _, wish := range byAudience {
sort.Strings(wish.Scopes)
out = append(out, wish)
}
sort.Slice(out, func(i, j int) bool { return out[i].Audience() < out[j].Audience() })
return out
}
func GrantName(computevm string, wish GrantWish) string {
sum := sha256.Sum256([]byte(wish.Audience()))
return computevm + "-" + hex.EncodeToString(sum[:])[:12]
}
func WishKey(wish GrantWish) string {
scopes := append([]string(nil), wish.Scopes...)
sort.Strings(scopes)
claims := append([]v1alpha1.GuestIdentityClaim(nil), wish.Claims...)
sort.Slice(claims, func(i, j int) bool { return claims[i].Name < claims[j].Name })
raw, _ := json.Marshal(struct {
API string `json:"api"`
Actx string `json:"actx"`
Scopes []string `json:"scopes"`
Claims []v1alpha1.GuestIdentityClaim `json:"claims"`
}{wish.API, wish.Actx, scopes, claims})
return string(raw)
}
func HeldKey(g v1alpha1.GuestIdentityGrant) string {
scopes := append([]string(nil), g.Spec.Scopes...)
sort.Strings(scopes)
claims := append([]v1alpha1.GuestIdentityClaim(nil), g.Spec.Claims...)
sort.Slice(claims, func(i, j int) bool { return claims[i].Name < claims[j].Name })
raw, _ := json.Marshal(struct {
API string `json:"api"`
Actx string `json:"actx"`
Scopes []string `json:"scopes"`
Claims []v1alpha1.GuestIdentityClaim `json:"claims"`
}{g.Spec.Api, g.Spec.Actx, scopes, claims})
return string(raw)
}
