126 lines
3.7 KiB
Go
126 lines
3.7 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package luarestywaf
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import (
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"strings"
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networking "k8s.io/api/networking/v1beta1"
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"k8s.io/ingress-nginx/internal/ingress/annotations/parser"
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"k8s.io/ingress-nginx/internal/ingress/errors"
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"k8s.io/ingress-nginx/internal/ingress/resolver"
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"k8s.io/ingress-nginx/internal/sets"
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)
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var luaRestyWAFModes = map[string]bool{"ACTIVE": true, "INACTIVE": true, "SIMULATE": true}
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// Config returns lua-resty-waf configuration for an Ingress rule
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type Config struct {
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Mode string `json:"mode"`
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Debug bool `json:"debug"`
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IgnoredRuleSets []string `json:"ignored-rulesets"`
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ExtraRulesetString string `json:"extra-ruleset-string"`
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ScoreThreshold int `json:"score-threshold"`
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AllowUnknownContentTypes bool `json:"allow-unknown-content-types"`
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ProcessMultipartBody bool `json:"process-multipart-body"`
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}
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// Equal tests for equality between two Config types
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func (e1 *Config) Equal(e2 *Config) bool {
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if e1 == e2 {
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return true
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}
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if e1 == nil || e2 == nil {
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return false
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}
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if e1.Mode != e2.Mode {
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return false
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}
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if e1.Debug != e2.Debug {
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return false
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}
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match := sets.StringElementsMatch(e1.IgnoredRuleSets, e2.IgnoredRuleSets)
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if !match {
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return false
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}
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if e1.ExtraRulesetString != e2.ExtraRulesetString {
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return false
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}
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if e1.ScoreThreshold != e2.ScoreThreshold {
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return false
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}
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if e1.AllowUnknownContentTypes != e2.AllowUnknownContentTypes {
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return false
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}
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if e1.ProcessMultipartBody != e2.ProcessMultipartBody {
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return false
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}
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return true
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}
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type luarestywaf struct {
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r resolver.Resolver
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}
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// NewParser creates a new CORS annotation parser
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func NewParser(r resolver.Resolver) parser.IngressAnnotation {
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return luarestywaf{r}
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}
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// Parse parses the annotations contained in the ingress rule
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// used to indicate if the location/s contains a fragment of
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// configuration to be included inside the paths of the rules
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func (a luarestywaf) Parse(ing *networking.Ingress) (interface{}, error) {
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var err error
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config := &Config{}
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mode, err := parser.GetStringAnnotation("lua-resty-waf", ing)
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if err != nil {
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return &Config{}, err
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}
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config.Mode = strings.ToUpper(mode)
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if _, ok := luaRestyWAFModes[config.Mode]; !ok {
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return &Config{}, errors.NewInvalidAnnotationContent("lua-resty-waf", mode)
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}
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config.Debug, _ = parser.GetBoolAnnotation("lua-resty-waf-debug", ing)
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ignoredRuleSetsStr, _ := parser.GetStringAnnotation("lua-resty-waf-ignore-rulesets", ing)
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config.IgnoredRuleSets = strings.FieldsFunc(ignoredRuleSetsStr, func(c rune) bool {
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strC := string(c)
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return strC == "," || strC == " "
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})
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// TODO(elvinefendi) maybe validate the ruleset string here
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config.ExtraRulesetString, _ = parser.GetStringAnnotation("lua-resty-waf-extra-rules", ing)
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config.ScoreThreshold, _ = parser.GetIntAnnotation("lua-resty-waf-score-threshold", ing)
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config.AllowUnknownContentTypes, _ = parser.GetBoolAnnotation("lua-resty-waf-allow-unknown-content-types", ing)
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config.ProcessMultipartBody, err = parser.GetBoolAnnotation("lua-resty-waf-process-multipart-body", ing)
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if err != nil {
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config.ProcessMultipartBody = true
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}
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return config, nil
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}
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