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package csbouncer
import (
"context"
"crypto/tls"
"crypto/x509"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"strings"
log "github.com/sirupsen/logrus"
"gopkg.in/yaml.v2"
"github.com/crowdsecurity/crowdsec/pkg/apiclient"
"github.com/crowdsecurity/crowdsec/pkg/models"
)
type LiveBouncer struct {
APIKey string `yaml:"api_key"`
APIUrl string `yaml:"api_url"`
InsecureSkipVerify *bool `yaml:"insecure_skip_verify"`
CertPath string `yaml:"cert_path"`
KeyPath string `yaml:"key_path"`
CAPath string `yaml:"ca_path"`
APIClient *apiclient.ApiClient
UserAgent string
}
// Config() fills the struct with configuration values from a file. It is not
// aware of .yaml.local files so it is recommended to use ConfigReader() instead
func (b *LiveBouncer) Config(configPath string) error {
reader, err := os.Open(configPath)
if err != nil {
return fmt.Errorf("unable to read config file '%s': %w", configPath, err)
}
return b.ConfigReader(reader)
}
func (b *LiveBouncer) ConfigReader(configReader io.Reader) error {
content, err := io.ReadAll(configReader)
if err != nil {
return fmt.Errorf("unable to read configuration: %w", err)
}
err = yaml.Unmarshal(content, b)
if err != nil {
return fmt.Errorf("unable to unmarshal configuration: %w", err)
}
if b.APIUrl == "" {
return fmt.Errorf("config does not contain LAPI url")
}
if !strings.HasSuffix(b.APIUrl, "/") {
b.APIUrl += "/"
}
if b.APIKey == "" && b.CertPath == "" && b.KeyPath == "" {
return fmt.Errorf("config does not contain LAPI key or certificate")
}
return nil
}
func (b *LiveBouncer) Init() error {
var (
err error
apiURL *url.URL
client *http.Client
caCertPool *x509.CertPool
InsecureSkipVerify bool
ok bool
)
apiURL, err = url.Parse(b.APIUrl)
if err != nil {
return fmt.Errorf("local API Url '%s': %w", b.APIUrl, err)
}
if b.CAPath != "" {
log.Infof("Using CA cert '%s'", b.CAPath)
caCert, err := ioutil.ReadFile(b.CAPath)
if err != nil {
return fmt.Errorf("unable to load CA certificate '%s': %w", b.CAPath, err)
}
caCertPool = x509.NewCertPool()
caCertPool.AppendCertsFromPEM(caCert)
} else {
caCertPool = nil
}
if b.InsecureSkipVerify == nil {
InsecureSkipVerify = false
} else {
InsecureSkipVerify = *b.InsecureSkipVerify
}
if b.APIKey != "" {
var transport *apiclient.APIKeyTransport
log.Infof("Using API key auth")
if apiURL.Scheme == "https" {
transport = &apiclient.APIKeyTransport{
APIKey: b.APIKey,
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
RootCAs: caCertPool,
InsecureSkipVerify: InsecureSkipVerify,
},
},
}
} else {
transport = &apiclient.APIKeyTransport{
APIKey: b.APIKey,
}
}
client = transport.Client()
ok = true
}
if b.CertPath != "" && b.KeyPath != "" {
var certificate tls.Certificate
log.Infof("Using cert auth")
certificate, err = tls.LoadX509KeyPair(b.CertPath, b.KeyPath)
if err != nil {
return fmt.Errorf("unable to load certificate '%s' and key '%s': %w", b.CertPath, b.KeyPath, err)
}
client = &http.Client{}
client.Transport = &http.Transport{
TLSClientConfig: &tls.Config{
RootCAs: caCertPool,
Certificates: []tls.Certificate{certificate},
InsecureSkipVerify: InsecureSkipVerify,
},
}
ok = true
}
if !ok {
return errors.New("no API key nor certificate provided")
}
b.APIClient, err = apiclient.NewDefaultClient(apiURL, "v1", b.UserAgent, client)
if err != nil {
return fmt.Errorf("api client init: %w", err)
}
return nil
}
func (b *LiveBouncer) Get(value string) (*models.GetDecisionsResponse, error) {
filter := apiclient.DecisionsListOpts{
IPEquals: &value,
}
decision, resp, err := b.APIClient.Decisions.List(context.Background(), filter)
if err != nil {
if resp != nil && resp.Response != nil {
resp.Response.Body.Close()
}
return &models.GetDecisionsResponse{}, err
}
if resp != nil && resp.Response != nil {
resp.Response.Body.Close()
}
return decision, nil
}
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