69 lines
1.5 KiB
Go
69 lines
1.5 KiB
Go
package main
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import (
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"crypto/sha1"
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"encoding/base64"
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"encoding/csv"
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"io"
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"log"
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"os"
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"golang.org/x/crypto/bcrypt"
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)
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// Lookup passwords in a htpasswd file
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// Passwords must be generated with -B for bcrypt or -s for SHA1.
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type HtpasswdFile struct {
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Users map[string]string
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}
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func NewHtpasswdFromFile(path string) (*HtpasswdFile, error) {
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r, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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defer r.Close()
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return NewHtpasswd(r)
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}
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func NewHtpasswd(file io.Reader) (*HtpasswdFile, error) {
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csv_reader := csv.NewReader(file)
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csv_reader.Comma = ':'
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csv_reader.Comment = '#'
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csv_reader.TrimLeadingSpace = true
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records, err := csv_reader.ReadAll()
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if err != nil {
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return nil, err
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}
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h := &HtpasswdFile{Users: make(map[string]string)}
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for _, record := range records {
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h.Users[record[0]] = record[1]
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}
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return h, nil
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}
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func (h *HtpasswdFile) Validate(user string, password string) bool {
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realPassword, exists := h.Users[user]
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if !exists {
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return false
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}
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shaPrefix := realPassword[:5]
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if shaPrefix == "{SHA}" {
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shaValue := realPassword[5:]
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d := sha1.New()
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d.Write([]byte(password))
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return shaValue == base64.StdEncoding.EncodeToString(d.Sum(nil))
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}
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bcryptPrefix := realPassword[:4]
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if bcryptPrefix == "$2a$" || bcryptPrefix == "$2b$" || bcryptPrefix == "$2x$" || bcryptPrefix == "$2y$" {
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return bcrypt.CompareHashAndPassword([]byte(realPassword), []byte(password)) == nil
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}
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log.Printf("Invalid htpasswd entry for %s. Must be a SHA or bcrypt entry.", user)
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return false
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}
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