add http-auth-htpasswd (#537)

* add http-auth-htpasswd

* go mod tidy

README.md

@@ -87,7 +87,7 @@ https://transfer.sh/1lDau/test.txt --> https://transfer.sh/inline/1lDau/test.txt
 ## Usage
 
 Parameter | Description                                                                                 | Value | Env                         
---- | --- | --- | ---
+--- |---------------------------------------------------------------------------------------------| --- |-----------------------------
 listener | port to use for http (:80)                                                                  | | LISTENER                    |
 profile-listener | port to use for profiler (:6060)                                                            | | PROFILE_LISTENER            |
 force-https | redirect to https                                                                           | false | FORCE_HTTPS                 
@@ -97,6 +97,7 @@ tls-cert-file | path to tls certificate | | TLS_CERT_FILE |
 tls-private-key | path to tls private key                                                                     | | TLS_PRIVATE_KEY             |
 http-auth-user | user for basic http auth on upload                                                          | | HTTP_AUTH_USER              |
 http-auth-pass | pass for basic http auth on upload                                                          | | HTTP_AUTH_PASS              |
+http-auth-htpasswd | htpasswd file path for basic http auth on upload                                            | | HTTP_AUTH_HTPASSWD          |
 ip-whitelist | comma separated list of ips allowed to connect to the service                               | | IP_WHITELIST                |
 ip-blacklist | comma separated list of ips not allowed to connect to the service                           | | IP_BLACKLIST                |
 temp-path | path to temp folder                                                                         | system temp | TEMP_PATH                   |

cmd/cmd.go

@@ -270,6 +270,12 @@ var globalFlags = []cli.Flag{
 		Value:  "",
 		EnvVar: "HTTP_AUTH_PASS",
 	},
+	cli.StringFlag{
+		Name:   "http-auth-htpasswd",
+		Usage:  "htpasswd file http basic auth",
+		Value:  "",
+		EnvVar: "HTTP_AUTH_HTPASSWD",
+	},
 	cli.StringFlag{
 		Name:   "ip-whitelist",
 		Usage:  "comma separated list of ips allowed to connect to the service",
@@ -440,6 +446,10 @@ func New() *Cmd {
 			options = append(options, server.HTTPAuthCredentials(httpAuthUser, httpAuthPass))
 		}
 
+		if httpAuthHtpasswd := c.String("http-auth-htpasswd"); httpAuthHtpasswd != "" {
+			options = append(options, server.HTTPAuthHtpasswd(httpAuthHtpasswd))
+		}
+
 		applyIPFilter := false
 		ipFilterOptions := server.IPFilterOptions{}
 		if ipWhitelist := c.String("ip-whitelist"); ipWhitelist != "" {

flake.nix

@@ -44,6 +44,7 @@
               tls-private-key = mkOption { type = types.nullOr types.str; description = "path to tls private key "; };
               http-auth-user = mkOption { type = types.nullOr types.str; description = "user for basic http auth on upload"; };
               http-auth-pass = mkOption { type = types.nullOr types.str; description = "pass for basic http auth on upload"; };
+              http-auth-htpasswd = mkOption { type = types.nullOr types.str; description = "htpasswd file path for basic http auth on upload"; };
               ip-whitelist = mkOption { type = types.nullOr types.str; description = "comma separated list of ips allowed to connect to the service"; };
               ip-blacklist = mkOption { type = types.nullOr types.str; description = "comma separated list of ips not allowed to connect to the service"; };
               temp-path = mkOption { type = types.nullOr types.str; description = "path to temp folder"; };

go.mod

@@ -19,6 +19,7 @@ require (
 	github.com/microcosm-cc/bluemonday v1.0.23
 	github.com/russross/blackfriday/v2 v2.1.0
 	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
+	github.com/tg123/go-htpasswd v1.2.1
 	github.com/tomasen/realip v0.0.0-20180522021738-f0c99a92ddce
 	github.com/urfave/cli v1.22.12
 	golang.org/x/crypto v0.6.0
@@ -33,6 +34,7 @@ require (
 require (
 	cloud.google.com/go/compute v1.18.0 // indirect
 	cloud.google.com/go/compute/metadata v0.2.3 // indirect
+	github.com/GehirnInc/crypt v0.0.0-20200316065508-bb7000b8a962 // indirect
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/calebcase/tmpfile v1.0.3 // indirect
 	github.com/cloudflare/circl v1.1.0 // indirect

go.sum

@@ -9,6 +9,8 @@ cloud.google.com/go/longrunning v0.4.1 h1:v+yFJOfKC3yZdY6ZUI933pIYdhyhV8S3NpWrXW
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/GehirnInc/crypt v0.0.0-20200316065508-bb7000b8a962 h1:KeNholpO2xKjgaaSyd+DyQRrsQjhbSeS7qe4nEw8aQw=
+github.com/GehirnInc/crypt v0.0.0-20200316065508-bb7000b8a962/go.mod h1:kC29dT1vFpj7py2OvG1khBdQpo3kInWP+6QipLbdngo=
 github.com/ProtonMail/go-crypto v0.0.0-20230124153114-0acdc8ae009b/go.mod h1:I0gYDMZ6Z5GRU7l58bNFSkPTFN6Yl12dsUlAZ8xy98g=
 github.com/ProtonMail/go-crypto v0.0.0-20230217124315-7d5c6f04bbb8 h1:wPbRQzjjwFc0ih8puEVAOFGELsn1zoIIYdxvML7mDxA=
 github.com/ProtonMail/go-crypto v0.0.0-20230217124315-7d5c6f04bbb8/go.mod h1:I0gYDMZ6Z5GRU7l58bNFSkPTFN6Yl12dsUlAZ8xy98g=
@@ -179,6 +181,8 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/tg123/go-htpasswd v1.2.1 h1:i4wfsX1KvvkyoMiHZzjS0VzbAPWfxzI8INcZAKtutoU=
+github.com/tg123/go-htpasswd v1.2.1/go.mod h1:erHp1B86KXdwQf1X5ZrLb7erXZnWueEQezb2dql4q58=
 github.com/tomasen/realip v0.0.0-20180522021738-f0c99a92ddce h1:fb190+cK2Xz/dvi9Hv8eCYJYvIGUTN2/KLq1pT6CjEc=
 github.com/tomasen/realip v0.0.0-20180522021738-f0c99a92ddce/go.mod h1:o8v6yHRoik09Xen7gje4m9ERNah1d1PPsVq1VEx9vE4=
 github.com/urfave/cli v1.22.12 h1:igJgVw1JdKH+trcLWLeLwZjU9fEfPesQ+9/e4MQ44S8=

server/handlers.go

@@ -57,6 +57,7 @@ import (
 	"github.com/ProtonMail/go-crypto/openpgp/packet"
 	"github.com/ProtonMail/gopenpgp/v2/constants"
 	"github.com/dutchcoders/transfer.sh/server/storage"
+	"github.com/tg123/go-htpasswd"
 
 	web "github.com/dutchcoders/transfer.sh-web"
 	"github.com/gorilla/mux"
@@ -1319,11 +1320,21 @@ func ipFilterHandler(h http.Handler, ipFilterOptions *IPFilterOptions) http.Hand
 
 func (s *Server) basicAuthHandler(h http.Handler) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
-		if s.AuthUser == "" || s.AuthPass == "" {
+		if s.AuthUser == "" || s.AuthPass == "" || s.AuthHtpasswd == "" {
 			h.ServeHTTP(w, r)
 			return
 		}
 
+		if s.htpasswdFile == nil && s.AuthHtpasswd != "" {
+			htpasswdFile, err := htpasswd.New(s.AuthHtpasswd, htpasswd.DefaultSystems, nil)
+			if err != nil {
+				http.Error(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
+
+			s.htpasswdFile = htpasswdFile
+		}
+
 		w.Header().Set("WWW-Authenticate", "Basic realm=\"Restricted\"")
 
 		username, password, authOK := r.BasicAuth()
@@ -1332,7 +1343,16 @@ func (s *Server) basicAuthHandler(h http.Handler) http.HandlerFunc {
 			return
 		}
 
-		if username != s.AuthUser || password != s.AuthPass {
+		var authorized bool
+		if username == s.AuthUser && password == s.AuthPass {
+			authorized = true
+		}
+
+		if s.htpasswdFile != nil && !authorized {
+			authorized = s.htpasswdFile.Match(username, password)
+		}
+
+		if !authorized {
 			http.Error(w, "Not authorized", http.StatusUnauthorized)
 			return
 		}

server/server.go

@@ -49,6 +49,7 @@ import (
 	"github.com/VojtechVitek/ratelimit/memory"
 	gorillaHandlers "github.com/gorilla/handlers"
 	"github.com/gorilla/mux"
+	"github.com/tg123/go-htpasswd"
 	"golang.org/x/crypto/acme/autocert"
 
 	web "github.com/dutchcoders/transfer.sh-web"
@@ -299,6 +300,13 @@ func HTTPAuthCredentials(user string, pass string) OptionFn {
 	}
 }
 
+// HTTPAuthHtpasswd sets basic http auth htpasswd file
+func HTTPAuthHtpasswd(htpasswdPath string) OptionFn {
+	return func(srvr *Server) {
+		srvr.AuthHtpasswd = htpasswdPath
+	}
+}
+
 // FilterOptions sets ip filtering
 func FilterOptions(options IPFilterOptions) OptionFn {
 	for i, allowedIP := range options.AllowedIPs {
@@ -318,6 +326,9 @@ func FilterOptions(options IPFilterOptions) OptionFn {
 type Server struct {
 	AuthUser     string
 	AuthPass     string
+	AuthHtpasswd string
+
+	htpasswdFile *htpasswd.File
 
 	logger *log.Logger