104 lines
2.3 KiB
Go
104 lines
2.3 KiB
Go
package main
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import (
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"io/ioutil"
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"time"
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jwt "github.com/dgrijalva/jwt-go"
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"golang.org/x/crypto/bcrypt"
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)
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// JWTAuthBackend - jwt auth backend
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type JWTAuthBackend struct {
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privateKey *rsa.PrivateKey
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PublicKey *rsa.PublicKey
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}
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const (
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jwtExpirationDelta = 10
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expireOffset = 3600
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)
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// InitJWT - init.
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func InitJWT() *JWTAuthBackend {
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authBackendInstance := &JWTAuthBackend{
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privateKey: getPrivateKey(),
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PublicKey: getPublicKey(),
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}
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return authBackendInstance
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}
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// GenerateToken -
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func (b *JWTAuthBackend) GenerateToken(userName string) (string, error) {
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token := jwt.New(jwt.SigningMethodRS512)
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token.Claims["exp"] = time.Now().Add(time.Hour * time.Duration(jwtExpirationDelta)).Unix()
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token.Claims["iat"] = time.Now().Unix()
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token.Claims["sub"] = userName
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tokenString, err := token.SignedString(b.privateKey)
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if err != nil {
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return "", err
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}
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return tokenString, nil
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}
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// Authenticate -
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func (b *JWTAuthBackend) Authenticate(args *LoginArgs, accessKeyID, secretAccessKey string) bool {
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hashedPassword, _ := bcrypt.GenerateFromPassword([]byte(secretAccessKey), 10)
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if args.Username == accessKeyID {
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return bcrypt.CompareHashAndPassword(hashedPassword, []byte(args.Password)) == nil
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}
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return false
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}
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//
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func (b *JWTAuthBackend) getTokenRemainingValidity(timestamp interface{}) int {
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if validity, ok := timestamp.(float64); ok {
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tm := time.Unix(int64(validity), 0)
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remainer := tm.Sub(time.Now())
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if remainer > 0 {
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return int(remainer.Seconds() + expireOffset)
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}
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}
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return expireOffset
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}
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// Logout - logout is not implemented yet.
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func (b *JWTAuthBackend) Logout(tokenString string) error {
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return nil
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}
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func getPrivateKey() *rsa.PrivateKey {
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pemBytes, err := ioutil.ReadFile(mustGetPrivateKeyPath())
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if err != nil {
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panic(err)
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}
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data, _ := pem.Decode([]byte(pemBytes))
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privateKeyImported, err := x509.ParsePKCS1PrivateKey(data.Bytes)
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if err != nil {
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panic(err)
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}
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return privateKeyImported
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}
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func getPublicKey() *rsa.PublicKey {
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pemBytes, err := ioutil.ReadFile(mustGetPublicKeyPath())
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if err != nil {
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panic(err)
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}
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data, _ := pem.Decode([]byte(pemBytes))
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publicKeyImported, err := x509.ParsePKIXPublicKey(data.Bytes)
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if err != nil {
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panic(err)
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}
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rsaPub, ok := publicKeyImported.(*rsa.PublicKey)
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if !ok {
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panic(err)
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}
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return rsaPub
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}
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