Start working on #8: Support basic authentication for the dashboard

config/config.go

@@ -5,6 +5,7 @@ import (
 	"github.com/TwinProduction/gatus/alerting"
 	"github.com/TwinProduction/gatus/alerting/provider"
 	"github.com/TwinProduction/gatus/core"
+	"github.com/TwinProduction/gatus/security"
 	"gopkg.in/yaml.v2"
 	"io/ioutil"
 	"log"
@@ -21,6 +22,7 @@ var (
 	ErrNoServiceInConfig     = errors.New("configuration file should contain at least 1 service")
 	ErrConfigFileNotFound    = errors.New("configuration file not found")
 	ErrConfigNotLoaded       = errors.New("configuration is nil")
+	ErrInvalidSecurityConfig = errors.New("invalid security configuration")
 	config                   *Config
 )
 
@@ -28,6 +30,7 @@ var (
 type Config struct {
 	Metrics  bool             `yaml:"metrics"`
 	Debug    bool             `yaml:"debug"`
+	Security *security.Config `yaml:"security"`
 	Alerting *alerting.Config `yaml:"alerting"`
 	Services []*core.Service  `yaml:"services"`
 }
@@ -83,6 +86,7 @@ func parseAndValidateConfigBytes(yamlBytes []byte) (config *Config, err error) {
 		err = ErrNoServiceInConfig
 	} else {
 		validateAlertingConfig(config)
+		validateSecurityConfig(config)
 		validateServicesConfig(config)
 	}
 	return
@@ -98,6 +102,20 @@ func validateServicesConfig(config *Config) {
 	log.Printf("[config][validateServicesConfig] Validated %d services", len(config.Services))
 }
 
+func validateSecurityConfig(config *Config) {
+	if config.Security != nil {
+		if config.Security.IsValid() {
+			if config.Debug {
+				log.Printf("[config][validateSecurityConfig] Basic security configuration has been validated")
+			}
+		} else {
+			// If there was an attempt to configure security, then it must mean that some confidential or private
+			// data are exposed. As a result, we'll force a panic because it's better to be safe than sorry.
+			panic(ErrInvalidSecurityConfig)
+		}
+	}
+}
+
 func validateAlertingConfig(config *Config) {
 	if config.Alerting == nil {
 		log.Printf("[config][validateAlertingConfig] Alerting is not configured")

config/config_test.go

@@ -1,6 +1,7 @@
 package config
 
 import (
+	"fmt"
 	"github.com/TwinProduction/gatus/core"
 	"testing"
 	"time"
@@ -217,3 +218,56 @@ services:
 		t.Fatal("PagerDuty alerting config should've been invalid")
 	}
 }
+
+func TestParseAndValidateConfigBytesWithInvalidSecurityConfig(t *testing.T) {
+	defer func() { recover() }()
+	_, _ = parseAndValidateConfigBytes([]byte(`
+security:
+  basic:
+    username: "admin"
+    password-sha512: "invalid-sha512-hash"
+services:
+  - name: twinnation
+    url: https://twinnation.org/actuator/health
+    conditions:
+      - "[STATUS] == 200"
+`))
+	t.Error("Function should've panicked")
+}
+
+func TestParseAndValidateConfigBytesWithValidSecurityConfig(t *testing.T) {
+	const expectedUsername = "admin"
+	const expectedPasswordHash = "6b97ed68d14eb3f1aa959ce5d49c7dc612e1eb1dafd73b1e705847483fd6a6c809f2ceb4e8df6ff9984c6298ff0285cace6614bf8daa9f0070101b6c89899e22"
+	config, err := parseAndValidateConfigBytes([]byte(fmt.Sprintf(`
+security:
+  basic:
+    username: "%s"
+    password-sha512: "%s"
+services:
+  - name: twinnation
+    url: https://twinnation.org/actuator/health
+    conditions:
+      - "[STATUS] == 200"
+`, expectedUsername, expectedPasswordHash)))
+	if err != nil {
+		t.Error("No error should've been returned")
+	}
+	if config == nil {
+		t.Fatal("Config shouldn't have been nil")
+	}
+	if config.Security == nil {
+		t.Fatal("config.Security shouldn't have been nil")
+	}
+	if !config.Security.IsValid() {
+		t.Error("Security config should've been valid")
+	}
+	if config.Security.Basic == nil {
+		t.Fatal("config.Security.Basic shouldn't have been nil")
+	}
+	if config.Security.Basic.Username != expectedUsername {
+		t.Errorf("config.Security.Basic.Username should've been %s, but was %s", expectedUsername, config.Security.Basic.Username)
+	}
+	if config.Security.Basic.PasswordSha512Hash != expectedPasswordHash {
+		t.Errorf("config.Security.Basic.PasswordSha512Hash should've been %s, but was %s", expectedPasswordHash, config.Security.Basic.PasswordSha512Hash)
+	}
+}

security/security.go

@@ -0,0 +1,18 @@
+package security
+
+type Config struct {
+	Basic *BasicConfig `yaml:"basic"`
+}
+
+func (c *Config) IsValid() bool {
+	return c.Basic != nil && c.Basic.IsValid()
+}
+
+type BasicConfig struct {
+	Username           string `yaml:"username"`
+	PasswordSha512Hash string `yaml:"password-sha512"`
+}
+
+func (c *BasicConfig) IsValid() bool {
+	return len(c.Username) > 0 && len(c.PasswordSha512Hash) == 128
+}

security/security_test.go

@@ -0,0 +1,23 @@
+package security
+
+import "testing"
+
+func TestBasicConfig_IsValid(t *testing.T) {
+	basicConfig := &BasicConfig{
+		Username:           "admin",
+		PasswordSha512Hash: Sha512("test"),
+	}
+	if !basicConfig.IsValid() {
+		t.Error("basicConfig should've been valid")
+	}
+}
+
+func TestBasicConfig_IsValidWhenPasswordIsInvalid(t *testing.T) {
+	basicConfig := &BasicConfig{
+		Username:           "admin",
+		PasswordSha512Hash: "",
+	}
+	if basicConfig.IsValid() {
+		t.Error("basicConfig shouldn't have been valid")
+	}
+}