Update vendor

1 files changed, 86 insertions, 0 deletions

diff --git a/vendor/github.com/labstack/echo/middleware/basic_auth.go b/vendor/github.com/labstack/echo/middleware/basic_auth.go
new file mode 100644
index 00000000..e98a87e3
--- /dev/null
+++ b/vendor/github.com/labstack/echo/middleware/basic_auth.go
@@ -0,0 +1,86 @@
+package middleware
+
+import (
+	"encoding/base64"
+
+	"github.com/labstack/echo"
+)
+
+type (
+	// BasicAuthConfig defines the config for BasicAuth middleware.
+	BasicAuthConfig struct {
+		// Skipper defines a function to skip middleware.
+		Skipper Skipper
+
+		// Validator is a function to validate BasicAuth credentials.
+		// Required.
+		Validator BasicAuthValidator
+	}
+
+	// BasicAuthValidator defines a function to validate BasicAuth credentials.
+	BasicAuthValidator func(string, string, echo.Context) bool
+)
+
+const (
+	basic = "Basic"
+)
+
+var (
+	// DefaultBasicAuthConfig is the default BasicAuth middleware config.
+	DefaultBasicAuthConfig = BasicAuthConfig{
+		Skipper: DefaultSkipper,
+	}
+)
+
+// BasicAuth returns an BasicAuth middleware.
+//
+// For valid credentials it calls the next handler.
+// For missing or invalid credentials, it sends "401 - Unauthorized" response.
+func BasicAuth(fn BasicAuthValidator) echo.MiddlewareFunc {
+	c := DefaultBasicAuthConfig
+	c.Validator = fn
+	return BasicAuthWithConfig(c)
+}
+
+// BasicAuthWithConfig returns an BasicAuth middleware with config.
+// See `BasicAuth()`.
+func BasicAuthWithConfig(config BasicAuthConfig) echo.MiddlewareFunc {
+	// Defaults
+	if config.Validator == nil {
+		panic("basic-auth middleware requires a validator function")
+	}
+	if config.Skipper == nil {
+		config.Skipper = DefaultBasicAuthConfig.Skipper
+	}
+
+	return func(next echo.HandlerFunc) echo.HandlerFunc {
+		return func(c echo.Context) error {
+			if config.Skipper(c) {
+				return next(c)
+			}
+
+			auth := c.Request().Header.Get(echo.HeaderAuthorization)
+			l := len(basic)
+
+			if len(auth) > l+1 && auth[:l] == basic {
+				b, err := base64.StdEncoding.DecodeString(auth[l+1:])
+				if err != nil {
+					return err
+				}
+				cred := string(b)
+				for i := 0; i < len(cred); i++ {
+					if cred[i] == ':' {
+						// Verify credentials
+						if config.Validator(cred[:i], cred[i+1:], c) {
+							return next(c)
+						}
+					}
+				}
+			}
+
+			// Need to return `401` for browsers to pop-up login box.
+			c.Response().Header().Set(echo.HeaderWWWAuthenticate, basic+" realm=Restricted")
+			return echo.ErrUnauthorized
+		}
+	}
+}