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| package auth | |
| import ( | |
| "crypto/rsa" | |
| "errors" | |
| "fmt" | |
| "golang.org/x/crypto/ssh" | |
| "gopkg.in/square/go-jose.v2" | |
| "gopkg.in/square/go-jose.v2/jwt" | |
| "io/ioutil" | |
| "log" | |
| "os" | |
| "path" | |
| "time" | |
| ) | |
| type JwtPayload = struct { | |
| ID string | |
| Role string | |
| Permission []string | |
| } | |
| type JwtClaims = struct { | |
| jwt.Claims | |
| JwtPayload | |
| } | |
| func parseKey(rsaKeyLocation string) (*rsa.PrivateKey, error) { | |
| key, err := ioutil.ReadFile(rsaKeyLocation) | |
| if err != nil { | |
| log.Print("No RSA private Key found") | |
| return nil, errors.New("No RSA private Key found") | |
| } | |
| parseResult, err := ssh.ParseRawPrivateKey(key) | |
| if err != nil{ | |
| log.Print(err) | |
| return nil, errors.New("Error while parsing pem file") | |
| } | |
| privateKey := parseResult.(*rsa.PrivateKey) | |
| return privateKey, nil | |
| } | |
| func makeKeyPath(name string) (string, error) { | |
| currentDir, err := os.Getwd() | |
| if err != nil { | |
| return "", err | |
| } | |
| return path.Join(currentDir, name), nil | |
| } | |
| type Hour = int32 | |
| func Encrypt(payload JwtPayload, expiresIn Hour) (string, error) { | |
| keyPath, _ := makeKeyPath("auth.pem") | |
| privateKey, err := parseKey(keyPath) | |
| if err != nil { | |
| panic(err) | |
| } | |
| encrypter, err := jose.NewEncrypter( | |
| jose.A128GCM, | |
| jose.Recipient{Algorithm: jose.RSA_OAEP, Key: &privateKey.PublicKey}, | |
| (&jose.EncrypterOptions{}).WithType("JWT"), | |
| ) | |
| if err != nil { | |
| panic(err) | |
| } | |
| claims := JwtClaims{ | |
| Claims: jwt.Claims{ | |
| Subject: "DOQA", | |
| Issuer: "DOQA", | |
| Expiry: jwt.NewNumericDate(time.Now().Add(time.Hour * time.Duration(expiresIn))), | |
| }, | |
| JwtPayload: payload, | |
| } | |
| token, err := jwt.Encrypted(encrypter).Claims(claims).CompactSerialize() | |
| if err != nil { | |
| panic(err) | |
| } | |
| return token, nil | |
| } | |
| func Decrypt(token string) *JwtPayload { | |
| keyPath, _ := makeKeyPath("auth.pem") | |
| privateKey, err := parseKey(keyPath) | |
| if err != nil { | |
| panic(err) | |
| } | |
| object, err := jwt.ParseEncrypted(token) | |
| if err != nil { | |
| panic(err) | |
| } | |
| decoded := &JwtPayload{} | |
| _ = object.Claims(privateKey, decoded) | |
| return decoded | |
| } | |
| func Test() { | |
| payloadIn := JwtPayload{ | |
| ID: "1", | |
| Role: "test", | |
| Permission: []string{"Penn", "Teller"}, | |
| } | |
| token, _ := Encrypt(payloadIn, 5) | |
| fmt.Printf("Token: %s\n\n", token) | |
| object, err := jwt.ParseEncrypted(token) | |
| if err != nil { | |
| fmt.Println(err) | |
| } | |
| encClaims := JwtPayload{} | |
| _ = object.Claims(&encClaims) | |
| fmt.Printf("Parse ecnrypted: %+v\n\n", encClaims) | |
| payload := Decrypt(token) | |
| fmt.Printf("%+v\n\n", payload) | |
| } | |
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