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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| package token | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "github.com/dgrijalva/jwt-go" | ||
| ) | ||
|
|
||
| const minSecretKeySize = 32 | ||
|
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| type JWTMaker struct { | ||
| secretKey string | ||
| } | ||
|
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| func NewJWTMaker(secretKey string) (Maker, error) { | ||
| if len(secretKey) < minSecretKeySize { | ||
| return nil, fmt.Errorf("invalid key size: must be at least %d characters", minSecretKeySize) | ||
| } | ||
| return &JWTMaker{secretKey}, nil | ||
| } | ||
|
|
||
| func (maker *JWTMaker) CreateToken(username string, duration time.Duration) (string, error) { | ||
| payload, err := NewPayload(username, duration) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| jwtToken := jwt.NewWithClaims(jwt.SigningMethodHS256, payload) | ||
| return jwtToken.SignedString([]byte(maker.secretKey)) | ||
| } | ||
|
|
||
| func (maker *JWTMaker) VerifyToken(token string) (*Payload, error) { | ||
| keyFunc := func(token *jwt.Token) (interface{}, error) { | ||
| _, ok := token.Method.(*jwt.SigningMethodHMAC) | ||
| if !ok { | ||
| return nil, ErrInvalidToken | ||
| } | ||
| return []byte(maker.secretKey), nil | ||
| } | ||
|
|
||
| jwtToken, err := jwt.ParseWithClaims(token, &Payload{}, keyFunc) | ||
| if err != nil { | ||
| verr, ok := err.(*jwt.ValidationError) | ||
| if ok && errors.Is(verr.Inner, ErrExpiredToken) { | ||
| return nil, ErrExpiredToken | ||
| } | ||
| return nil, ErrInvalidToken | ||
| } | ||
|
|
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| payload, ok := jwtToken.Claims.(*Payload) | ||
| if !ok { | ||
| return nil, ErrInvalidToken | ||
| } | ||
|
|
||
| return payload, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| package token | ||
|
|
||
| import ( | ||
| "testing" | ||
| "time" | ||
|
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| "github.com/ayushrakesh/go-bank/util" | ||
| "github.com/dgrijalva/jwt-go" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
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| func TestJWTMaker(t *testing.T) { | ||
| maker, err := NewJWTMaker(util.RandomString(32)) | ||
| require.NoError(t, err) | ||
|
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| username := util.RandomOwner() | ||
| duration := time.Minute | ||
|
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| issuedAt := time.Now() | ||
| expiredAt := issuedAt.Add(duration) | ||
|
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| token, err := maker.CreateToken(username, duration) | ||
| require.NoError(t, err) | ||
| require.NotEmpty(t, token) | ||
|
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| payload, err := maker.VerifyToken(token) | ||
| require.NoError(t, err) | ||
| require.NotEmpty(t, payload) | ||
|
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||
| require.NotZero(t, payload.ID) | ||
| require.Equal(t, username, payload.UserName) | ||
| require.WithinDuration(t, issuedAt, payload.IssuedAt, time.Second) | ||
| require.WithinDuration(t, expiredAt, payload.ExpiredAt, time.Second) | ||
| } | ||
|
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||
| func TestExpiredJWTToken(t *testing.T) { | ||
| maker, err := NewJWTMaker(util.RandomString(32)) | ||
| require.NoError(t, err) | ||
|
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| token, err := maker.CreateToken(util.RandomOwner(), -time.Minute) | ||
| require.NoError(t, err) | ||
| require.NotEmpty(t, token) | ||
|
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| payload, err := maker.VerifyToken(token) | ||
| require.Error(t, err) | ||
| require.EqualError(t, err, ErrExpiredToken.Error()) | ||
| require.Nil(t, payload) | ||
| } | ||
|
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| func TestInvalidJWTTokenAlgNone(t *testing.T) { | ||
| payload, err := NewPayload(util.RandomOwner(), time.Minute) | ||
| require.NoError(t, err) | ||
|
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| jwtToken := jwt.NewWithClaims(jwt.SigningMethodNone, payload) | ||
| token, err := jwtToken.SignedString(jwt.UnsafeAllowNoneSignatureType) | ||
| require.NoError(t, err) | ||
|
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| maker, err := NewJWTMaker(util.RandomString(32)) | ||
| require.NoError(t, err) | ||
|
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| payload, err = maker.VerifyToken(token) | ||
| require.Error(t, err) | ||
| require.EqualError(t, err, ErrInvalidToken.Error()) | ||
| require.Nil(t, payload) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| package token | ||
|
|
||
| import "time" | ||
|
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||
| type Maker interface { | ||
| CreateToken(string, time.Duration) (string, error) | ||
| VerifyToken(token string) (*Payload, error) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| package token | ||
|
|
||
| import ( | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/ayushrakesh/go-bank/util" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
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| func TestPasetoMaker(t *testing.T) { | ||
| maker, err := NewPasetoMaker(util.RandomString(32)) | ||
| require.NoError(t, err) | ||
|
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| username := util.RandomOwner() | ||
| duration := time.Minute | ||
|
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| issuedAt := time.Now() | ||
| expiredAt := issuedAt.Add(duration) | ||
|
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| token, err := maker.CreateToken(username, duration) | ||
| require.NoError(t, err) | ||
| require.NotEmpty(t, token) | ||
|
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| payload, err := maker.VerifyToken(token) | ||
| require.NoError(t, err) | ||
| require.NotEmpty(t, payload) | ||
|
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| require.NotZero(t, payload.ID) | ||
| require.Equal(t, username, payload.UserName) | ||
| require.WithinDuration(t, issuedAt, payload.IssuedAt, time.Second) | ||
| require.WithinDuration(t, expiredAt, payload.ExpiredAt, time.Second) | ||
| } | ||
|
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| func TestExpiredPasetoToken(t *testing.T) { | ||
| maker, err := NewPasetoMaker(util.RandomString(32)) | ||
| require.NoError(t, err) | ||
|
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| token, err := maker.CreateToken(util.RandomOwner(), -time.Minute) | ||
| require.NoError(t, err) | ||
| require.NotEmpty(t, token) | ||
|
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| payload, err := maker.VerifyToken(token) | ||
| require.Error(t, err) | ||
| require.EqualError(t, err, ErrExpiredToken.Error()) | ||
| require.Nil(t, payload) | ||
| } |
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