73 lines
1.8 KiB
Go
73 lines
1.8 KiB
Go
package main
|
|
|
|
import (
|
|
"crypto/sha1"
|
|
"encoding/base64"
|
|
"encoding/csv"
|
|
"io"
|
|
"os"
|
|
|
|
"github.com/pusher/oauth2_proxy/pkg/logger"
|
|
"golang.org/x/crypto/bcrypt"
|
|
)
|
|
|
|
// Lookup passwords in a htpasswd file
|
|
// Passwords must be generated with -B for bcrypt or -s for SHA1.
|
|
|
|
// HtpasswdFile represents the structure of an htpasswd file
|
|
type HtpasswdFile struct {
|
|
Users map[string]string
|
|
}
|
|
|
|
// NewHtpasswdFromFile constructs an HtpasswdFile from the file at the path given
|
|
func NewHtpasswdFromFile(path string) (*HtpasswdFile, error) {
|
|
r, err := os.Open(path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer r.Close()
|
|
return NewHtpasswd(r)
|
|
}
|
|
|
|
// NewHtpasswd consctructs an HtpasswdFile from an io.Reader (opened file)
|
|
func NewHtpasswd(file io.Reader) (*HtpasswdFile, error) {
|
|
csvReader := csv.NewReader(file)
|
|
csvReader.Comma = ':'
|
|
csvReader.Comment = '#'
|
|
csvReader.TrimLeadingSpace = true
|
|
|
|
records, err := csvReader.ReadAll()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
h := &HtpasswdFile{Users: make(map[string]string)}
|
|
for _, record := range records {
|
|
h.Users[record[0]] = record[1]
|
|
}
|
|
return h, nil
|
|
}
|
|
|
|
// Validate checks a users password against the HtpasswdFile entries
|
|
func (h *HtpasswdFile) Validate(user string, password string) bool {
|
|
realPassword, exists := h.Users[user]
|
|
if !exists {
|
|
return false
|
|
}
|
|
|
|
shaPrefix := realPassword[:5]
|
|
if shaPrefix == "{SHA}" {
|
|
shaValue := realPassword[5:]
|
|
d := sha1.New()
|
|
d.Write([]byte(password))
|
|
return shaValue == base64.StdEncoding.EncodeToString(d.Sum(nil))
|
|
}
|
|
|
|
bcryptPrefix := realPassword[:4]
|
|
if bcryptPrefix == "$2a$" || bcryptPrefix == "$2b$" || bcryptPrefix == "$2x$" || bcryptPrefix == "$2y$" {
|
|
return bcrypt.CompareHashAndPassword([]byte(realPassword), []byte(password)) == nil
|
|
}
|
|
|
|
logger.Printf("Invalid htpasswd entry for %s. Must be a SHA or bcrypt entry.", user)
|
|
return false
|
|
}
|