Vendor main dependencies.

vendor/github.com/abbot/go-http-auth/users.go

@@ -0,0 +1,138 @@
+package auth
+
+import "encoding/csv"
+import "os"
+
+/* 
+ SecretProvider is used by authenticators. Takes user name and realm
+ as an argument, returns secret required for authentication (HA1 for
+ digest authentication, properly encrypted password for basic).
+ 
+ Returning an empty string means failing the authentication.
+*/
+type SecretProvider func(user, realm string) string
+
+/*
+ Common functions for file auto-reloading
+*/
+type File struct {
+	Path string
+	Info os.FileInfo
+	/* must be set in inherited types during initialization */
+	Reload func()
+}
+
+func (f *File) ReloadIfNeeded() {
+	info, err := os.Stat(f.Path)
+	if err != nil {
+		panic(err)
+	}
+	if f.Info == nil || f.Info.ModTime() != info.ModTime() {
+		f.Info = info
+		f.Reload()
+	}
+}
+
+/*
+ Structure used for htdigest file authentication. Users map realms to
+ maps of users to their HA1 digests.
+*/
+type HtdigestFile struct {
+	File
+	Users map[string]map[string]string
+}
+
+func reload_htdigest(hf *HtdigestFile) {
+	r, err := os.Open(hf.Path)
+	if err != nil {
+		panic(err)
+	}
+	csv_reader := csv.NewReader(r)
+	csv_reader.Comma = ':'
+	csv_reader.Comment = '#'
+	csv_reader.TrimLeadingSpace = true
+
+	records, err := csv_reader.ReadAll()
+	if err != nil {
+		panic(err)
+	}
+
+	hf.Users = make(map[string]map[string]string)
+	for _, record := range records {
+		_, exists := hf.Users[record[1]]
+		if !exists {
+			hf.Users[record[1]] = make(map[string]string)
+		}
+		hf.Users[record[1]][record[0]] = record[2]
+	}
+}
+
+/*
+ SecretProvider implementation based on htdigest-formated files. Will
+ reload htdigest file on changes. Will panic on syntax errors in
+ htdigest files.
+*/
+func HtdigestFileProvider(filename string) SecretProvider {
+	hf := &HtdigestFile{File: File{Path: filename}}
+	hf.Reload = func() { reload_htdigest(hf) }
+	return func(user, realm string) string {
+		hf.ReloadIfNeeded()
+		_, exists := hf.Users[realm]
+		if !exists {
+			return ""
+		}
+		digest, exists := hf.Users[realm][user]
+		if !exists {
+			return ""
+		}
+		return digest
+	}
+}
+
+/*
+ Structure used for htdigest file authentication. Users map users to
+ their salted encrypted password
+*/
+type HtpasswdFile struct {
+	File
+	Users map[string]string
+}
+
+func reload_htpasswd(h *HtpasswdFile) {
+	r, err := os.Open(h.Path)
+	if err != nil {
+		panic(err)
+	}
+	csv_reader := csv.NewReader(r)
+	csv_reader.Comma = ':'
+	csv_reader.Comment = '#'
+	csv_reader.TrimLeadingSpace = true
+
+	records, err := csv_reader.ReadAll()
+	if err != nil {
+		panic(err)
+	}
+
+	h.Users = make(map[string]string)
+	for _, record := range records {
+		h.Users[record[0]] = record[1]
+	}
+}
+
+/*
+ SecretProvider implementation based on htpasswd-formated files. Will
+ reload htpasswd file on changes. Will panic on syntax errors in
+ htpasswd files. Realm argument of the SecretProvider is ignored.
+*/
+func HtpasswdFileProvider(filename string) SecretProvider {
+	h := &HtpasswdFile{File: File{Path: filename}}
+	h.Reload = func() { reload_htpasswd(h) }
+	return func(user, realm string) string {
+		h.ReloadIfNeeded()
+		password, exists := h.Users[user]
+		if !exists {
+			return ""
+		}
+		return password
+	}
+}