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basic.go
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basic.go
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// Package basic implements basic auth decoding and
// self contained user authentication
package basic
import (
"encoding/base64"
"errors"
e "github.com/MG-RAST/Shock/shock-server/errors"
"github.com/MG-RAST/Shock/shock-server/user"
"strings"
)
// DecodeHeader takes the request authorization header and returns
// username and password if it is correctly encoded.
func DecodeHeader(header string) (username string, password string, err error) {
if strings.ToLower(strings.Split(header, " ")[0]) == "basic" {
if val, err := base64.URLEncoding.DecodeString(strings.Split(header, " ")[1]); err == nil {
tmp := strings.Split(string(val), ":")
if len(tmp) >= 2 {
return tmp[0], tmp[1], nil
} else {
return "", "", errors.New(e.InvalidAuth)
}
} else {
return "", "", errors.New(e.InvalidAuth)
}
}
return "", "", errors.New(e.InvalidAuth)
}
// Auth takes the request authorization header and returns
// user
func Auth(header string) (u *user.User, err error) {
username, password, err := DecodeHeader(header)
if err == nil {
return user.FindByUsernamePassword(username, password)
}
return nil, err
}