/
rbac.go
147 lines (122 loc) · 3.21 KB
/
rbac.go
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package ginkit
import (
"log"
"net/http"
"github.com/casbin/casbin/v2"
"github.com/gin-gonic/gin"
)
// TODO: Implement RBACConfig
type (
RBACConfig struct {
Model any
Policy any
Params []any
}
)
func (e *Engine) RBACTokenPathGroup(path string, model, policy any, tokenHeader string) *gin.RouterGroup {
restricted := e.Router().Group(path)
restricted.Use(RBACTokenPathMiddleware(model, policy, tokenHeader))
return restricted
}
func RBACTokenPathMiddleware(model, policy any, tokenHeader string) func(c *gin.Context) {
e, err := casbin.NewEnforcer(model, policy)
if err != nil {
log.Fatal(err)
}
return func(c *gin.Context) {
allowed := false
method := c.Request.Method
path := c.Request.URL.Path
for _, reqToken := range c.Request.Header[tokenHeader] {
allowed, err = e.Enforce(reqToken, path, method)
if err != nil {
ReturnData(c, http.StatusForbidden, gin.H{"error": err.Error()})
c.Abort()
return
}
if allowed {
continue
}
}
if !allowed {
ReturnData(c, http.StatusForbidden, gin.H{"error": "RBAC did not allow authorization"})
c.Abort()
return
}
}
}
func (e *Engine) RBACTokenParamGroup(path string, model, policy any, tokenHeader string, params []string) *gin.RouterGroup {
restricted := e.Router().Group(path)
restricted.Use(RBACTokenParamMiddleware(model, policy, tokenHeader, params))
return restricted
}
func RBACTokenParamMiddleware(model, policy any, tokenHeader string, params []string) func(c *gin.Context) {
e, err := casbin.NewEnforcer(model, policy)
if err != nil {
log.Fatal(err)
}
return func(c *gin.Context) {
allowed := false
var paramValues []string
for _, p := range params {
paramValues = append(paramValues, c.Param(p))
}
for _, reqToken := range c.Request.Header[tokenHeader] {
args := []interface{}{reqToken}
for _, v := range paramValues {
args = append(args, v)
}
allowed, err = e.Enforce(args...)
if err != nil {
ReturnData(c, http.StatusForbidden, gin.H{"error": err.Error()})
c.Abort()
return
}
if allowed {
continue
}
}
if !allowed {
ReturnData(c, http.StatusForbidden, gin.H{"error": "RBAC did not allow authorization"})
c.Abort()
return
}
}
}
func (e *Engine) RBACGroup(path string, config *RBACConfig) *gin.RouterGroup {
restricted := e.Router().Group(path)
restricted.Use(RBACMiddleware(config))
return restricted
}
func RBACMiddleware(config *RBACConfig) func(c *gin.Context) {
e, err := casbin.NewEnforcer(config.Model, config.Policy)
if err != nil {
log.Fatal(err)
}
return func(c *gin.Context) {
allowed := false
var paramValues []any
for _, p := range config.Params {
paramValue := parseContext(p, c)
if paramValue == nil {
ReturnData(c, http.StatusForbidden, gin.H{"error": "RBAC did not allow authorization"})
c.Abort()
return
}
paramValues = append(paramValues, paramValue)
}
allowed, err = e.Enforce(paramValues...)
if err != nil {
log.Println(err)
log.Println(paramValues)
ReturnData(c, http.StatusForbidden, gin.H{"error": err.Error()})
c.Abort()
return
}
if !allowed {
ReturnData(c, http.StatusForbidden, gin.H{"error": "RBAC did not allow authorization"})
c.Abort()
return
}
}
}