87 lines
3.1 KiB
Go
87 lines
3.1 KiB
Go
package csconfig
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import (
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"fmt"
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"io"
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"os"
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"time"
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"github.com/antonmedv/expr"
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"github.com/antonmedv/expr/vm"
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"github.com/crowdsecurity/crowdsec/pkg/exprhelpers"
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"github.com/crowdsecurity/crowdsec/pkg/models"
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"github.com/pkg/errors"
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log "github.com/sirupsen/logrus"
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"gopkg.in/yaml.v2"
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)
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//Profile structure(s) are used by the local API to "decide" what kind of decision should be applied when a scenario with an active remediation has been triggered
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type ProfileCfg struct {
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Name string `yaml:"name,omitempty"`
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Debug *bool `yaml:"debug,omitempty"`
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Filters []string `yaml:"filters,omitempty"` //A list of OR'ed expressions. the models.Alert object
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RuntimeFilters []*vm.Program `json:"-" yaml:"-"`
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DebugFilters []*exprhelpers.ExprDebugger `json:"-" yaml:"-"`
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Decisions []models.Decision `yaml:"decisions,omitempty"`
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OnSuccess string `yaml:"on_success,omitempty"` //continue or break
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OnFailure string `yaml:"on_failure,omitempty"` //continue or break
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Notifications []string `yaml:"notifications,omitempty"`
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}
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func (c *LocalApiServerCfg) LoadProfiles() error {
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if c.ProfilesPath == "" {
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return fmt.Errorf("empty profiles path")
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}
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yamlFile, err := os.Open(c.ProfilesPath)
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if err != nil {
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return errors.Wrapf(err, "while opening %s", c.ProfilesPath)
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}
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//process the yaml
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dec := yaml.NewDecoder(yamlFile)
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dec.SetStrict(true)
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for {
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t := ProfileCfg{}
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err = dec.Decode(&t)
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if err != nil {
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if err == io.EOF {
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break
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}
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return errors.Wrapf(err, "while decoding %s", c.ProfilesPath)
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}
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c.Profiles = append(c.Profiles, &t)
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}
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for pIdx, profile := range c.Profiles {
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var runtimeFilter *vm.Program
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var debugFilter *exprhelpers.ExprDebugger
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c.Profiles[pIdx].RuntimeFilters = make([]*vm.Program, len(profile.Filters))
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c.Profiles[pIdx].DebugFilters = make([]*exprhelpers.ExprDebugger, len(profile.Filters))
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for fIdx, filter := range profile.Filters {
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if runtimeFilter, err = expr.Compile(filter, expr.Env(exprhelpers.GetExprEnv(map[string]interface{}{"Alert": &models.Alert{}}))); err != nil {
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return errors.Wrapf(err, "Error compiling filter of %s", profile.Name)
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}
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c.Profiles[pIdx].RuntimeFilters[fIdx] = runtimeFilter
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if debugFilter, err = exprhelpers.NewDebugger(filter, expr.Env(exprhelpers.GetExprEnv(map[string]interface{}{"Alert": &models.Alert{}}))); err != nil {
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log.Debugf("Error compiling debug filter of %s : %s", profile.Name, err)
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// Don't fail if we can't compile the filter - for now
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// return errors.Wrapf(err, "Error compiling debug filter of %s", profile.Name)
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}
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c.Profiles[pIdx].DebugFilters[fIdx] = debugFilter
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}
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for _, decision := range profile.Decisions {
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if _, err := time.ParseDuration(*decision.Duration); err != nil {
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return errors.Wrapf(err, "Error parsing duration '%s' of %s", *decision.Duration, profile.Name)
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}
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}
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}
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if len(c.Profiles) == 0 {
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return fmt.Errorf("zero profiles loaded for LAPI")
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}
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return nil
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}
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