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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| package token | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/elisasre/go-common" | ||
| "github.com/golang-jwt/jwt" | ||
| ) | ||
|
|
||
| // Token struct. | ||
| type Token struct { | ||
| User *common.User | ||
| } | ||
|
|
||
| const ( | ||
| OpenID = "openid" | ||
| Profile = "profile" | ||
| Email = "email" | ||
| Groups = "groups" | ||
| Internal = "internal" | ||
| ) | ||
|
|
||
| var AllScopes = []string{OpenID, Profile, Email, Groups, Internal} | ||
|
|
||
| // SignClaims contains claims that are passed to SignExpires func. | ||
| type SignClaims struct { | ||
| Aud string | ||
| Exp int64 | ||
| Iat int64 | ||
| Issuer string | ||
| Nonce string | ||
| Scopes []string | ||
| } | ||
|
|
||
| // SignAlgo const. | ||
| const SignAlgo = "RS256" | ||
|
|
||
| // New constructs new token which is passed for application. | ||
| func New(user *common.User) *Token { | ||
| return &Token{User: user} | ||
| } | ||
|
|
||
| // UserJWTClaims contains struct for making and parsing jwt tokens. | ||
| type UserJWTClaims struct { | ||
| *common.User | ||
| jwt.StandardClaims | ||
| Nonce string `json:"nonce,omitempty"` | ||
| } | ||
|
|
||
| // SignExpires makes new jwt token using expiration time and secret. | ||
| func (t *Token) SignExpires(key common.JWTKey, claim SignClaims) (string, error) { | ||
| t.User.Email = common.String(strings.ToLower(common.StringValue(t.User.Email))) | ||
| sub := t.User.MakeSub() | ||
| if claim.Iat == 0 { | ||
| claim.Iat = time.Now().Unix() | ||
| } | ||
|
|
||
| if !common.Contains(claim.Scopes, OpenID) { | ||
| return "", fmt.Errorf("token must contain '%s' scope", OpenID) | ||
| } | ||
|
|
||
| if !common.Contains(claim.Scopes, Internal) { | ||
| t.User.Internal = nil | ||
| } | ||
|
|
||
| if !common.Contains(claim.Scopes, Email) { | ||
| t.User.Email = nil | ||
| t.User.EmailVerified = nil | ||
| } | ||
|
|
||
| if !common.Contains(claim.Scopes, Groups) { | ||
| t.User.Groups = nil | ||
| } | ||
|
|
||
| if !common.Contains(claim.Scopes, Profile) { | ||
| t.User.Name = nil | ||
| } | ||
|
|
||
| claims := UserJWTClaims{ | ||
| t.User, | ||
| jwt.StandardClaims{ | ||
| Subject: sub, | ||
| Audience: claim.Aud, | ||
| ExpiresAt: claim.Exp, | ||
| Issuer: claim.Issuer, | ||
| IssuedAt: claim.Iat, | ||
| }, | ||
| claim.Nonce, | ||
| } | ||
| method := jwt.SigningMethodRS256 | ||
| token := jwt.Token{ | ||
| Header: map[string]interface{}{ | ||
| "typ": "JWT", | ||
| "alg": method.Alg(), | ||
| "kid": key.KID, | ||
| }, | ||
| Claims: claims, | ||
| Method: method, | ||
| } | ||
| if key.PrivateKey == nil { | ||
| return "", fmt.Errorf("privatekey is nil for key %d", key.ID) | ||
| } | ||
| return token.SignedString(key.PrivateKey) | ||
| } | ||
|
|
||
| func findKidFromArray(keys []common.JWTKey, kid interface{}) (common.JWTKey, error) { | ||
| kidAsString, ok := kid.(string) | ||
| if !ok { | ||
| return common.JWTKey{}, fmt.Errorf("not str") | ||
| } | ||
| for _, s := range keys { | ||
| if s.KID == kidAsString { | ||
| return s, nil | ||
| } | ||
| } | ||
| return common.JWTKey{}, fmt.Errorf("could not find kid '%s'", kidAsString) | ||
| } | ||
|
|
||
| // Parse will validate jwt token and return token. | ||
| func Parse(raw string, keys []common.JWTKey) (*UserJWTClaims, error) { | ||
| parsed, err := jwt.ParseWithClaims(raw, &UserJWTClaims{}, func(t *jwt.Token) (interface{}, error) { | ||
| if t.Method.Alg() != SignAlgo { | ||
| return nil, jwt.ErrSignatureInvalid | ||
| } | ||
| if val, ok := t.Header["kid"]; ok { | ||
| key, err := findKidFromArray(keys, val) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return key.PublicKey, nil | ||
| } | ||
| return nil, fmt.Errorf("could not find kid from headers") | ||
| }) | ||
| if err != nil { | ||
| return nil, err | ||
| } else if !parsed.Valid { | ||
| return nil, jwt.ValidationError{} | ||
| } | ||
|
|
||
| claims, ok := parsed.Claims.(*UserJWTClaims) | ||
| if !ok { | ||
| return nil, fmt.Errorf("could not parse struct") | ||
| } | ||
| return claims, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| package token | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strings" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/elisasre/go-common" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| func TestToken(t *testing.T) { | ||
| key, err := common.GenerateNewKeyPair() | ||
| require.NoError(t, err) | ||
|
|
||
| fullUser := common.User{ | ||
| Name: common.String("Test User"), | ||
| Email: common.String("[email protected]"), | ||
| Groups: []string{"group1", "group2"}, | ||
| EmailVerified: common.Bool(true), | ||
| Internal: &common.Internal{ | ||
| EmployeeID: "123456", | ||
| MFA: common.Bool(true), | ||
| }, | ||
| } | ||
|
|
||
| type testCase struct { | ||
| name string | ||
| scopes []string | ||
| err error | ||
| user *common.User | ||
| } | ||
|
|
||
| testCases := []testCase{ | ||
| { | ||
| name: "all scopes", | ||
| scopes: AllScopes, | ||
| user: &common.User{ | ||
| Name: common.String("Test User"), | ||
| Email: common.String("[email protected]"), | ||
| Groups: []string{"group1", "group2"}, | ||
| EmailVerified: common.Bool(true), | ||
| Internal: &common.Internal{ | ||
| EmployeeID: "123456", | ||
| MFA: common.Bool(true), | ||
| }, | ||
| }, | ||
| }, | ||
| { | ||
| name: "openid", | ||
| scopes: []string{OpenID}, | ||
| user: nil, | ||
| }, | ||
| { | ||
| name: "openid profile", | ||
| scopes: []string{OpenID, Profile}, | ||
| user: &common.User{Name: common.String("Test User")}, | ||
| }, | ||
| { | ||
| name: "openid email", | ||
| scopes: []string{OpenID, Email}, | ||
| user: &common.User{ | ||
| Email: common.String("[email protected]"), | ||
| EmailVerified: common.Bool(true), | ||
| }, | ||
| }, | ||
| { | ||
| name: "openid groups", | ||
| scopes: []string{OpenID, Groups}, | ||
| user: &common.User{ | ||
| Groups: []string{"group1", "group2"}, | ||
| }, | ||
| }, | ||
| { | ||
| name: "openid internal", | ||
| scopes: []string{OpenID, Internal}, | ||
| user: &common.User{ | ||
| Internal: &common.Internal{ | ||
| EmployeeID: "123456", | ||
| MFA: common.Bool(true), | ||
| }, | ||
| }, | ||
| }, | ||
| { | ||
| name: "no openid scope", | ||
| scopes: []string{}, | ||
| err: fmt.Errorf("token must contain '%s' scope", OpenID), | ||
| }, | ||
| } | ||
|
|
||
| for _, tc := range testCases { | ||
| t.Run(tc.name, func(t *testing.T) { | ||
| user := tc.user | ||
| newUser := fullUser | ||
| testUser := New(&newUser) | ||
| token, err := testUser.SignExpires(*key, SignClaims{ | ||
| Aud: "internal", | ||
| Exp: time.Now().Add(time.Hour).Unix(), | ||
| Issuer: "http://localhost", | ||
| Scopes: tc.scopes, | ||
| }) | ||
| if tc.err != nil { | ||
| require.Equal(t, tc.err, err) | ||
| } else { | ||
| require.NoError(t, err) | ||
| userClaims, err := Parse(token, []common.JWTKey{*key}) | ||
| require.NoError(t, err) | ||
| require.Equal(t, user, userClaims.User) | ||
| } | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| func TestInvalidKid(t *testing.T) { | ||
| key, err := common.GenerateNewKeyPair() | ||
| require.NoError(t, err) | ||
| key2, err := common.GenerateNewKeyPair() | ||
| require.NoError(t, err) | ||
|
|
||
| testUser := New(&common.User{}) | ||
| token, err := testUser.SignExpires(*key, SignClaims{ | ||
| Aud: "internal", | ||
| Exp: time.Now().Add(time.Hour).Unix(), | ||
| Issuer: "http://localhost", | ||
| Scopes: AllScopes, | ||
| }) | ||
| require.NoError(t, err) | ||
| _, err = Parse(token, []common.JWTKey{*key2}) | ||
| require.Equal(t, fmt.Sprintf("could not find kid '%s'", key.KID), err.Error()) | ||
| } | ||
|
|
||
| func TestExpired(t *testing.T) { | ||
| key, err := common.GenerateNewKeyPair() | ||
| require.NoError(t, err) | ||
|
|
||
| testUser := New(&common.User{}) | ||
| token, err := testUser.SignExpires(*key, SignClaims{ | ||
| Aud: "internal", | ||
| Exp: 1, | ||
| Issuer: "http://localhost", | ||
| Scopes: AllScopes, | ||
| }) | ||
| require.NoError(t, err) | ||
| _, err = Parse(token, []common.JWTKey{*key}) | ||
| require.True(t, strings.HasPrefix(err.Error(), "token is expired by")) | ||
| } |
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