mirror of https://github.com/golang-jwt/jwt.git
110 lines
2.7 KiB
Go
110 lines
2.7 KiB
Go
package jwt
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import (
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"encoding/json"
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"fmt"
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)
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// MapClaims is a claims type that uses the map[string]interface{} for JSON
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// decoding. This is the default claims type if you don't supply one
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type MapClaims map[string]interface{}
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// GetExpirationTime implements the Claims interface.
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func (m MapClaims) GetExpirationTime() (*NumericDate, error) {
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return m.parseNumericDate("exp")
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}
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// GetNotBefore implements the Claims interface.
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func (m MapClaims) GetNotBefore() (*NumericDate, error) {
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return m.parseNumericDate("nbf")
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}
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// GetIssuedAt implements the Claims interface.
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func (m MapClaims) GetIssuedAt() (*NumericDate, error) {
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return m.parseNumericDate("iat")
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}
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// GetAudience implements the Claims interface.
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func (m MapClaims) GetAudience() (ClaimStrings, error) {
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return m.parseClaimsString("aud")
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}
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// GetIssuer implements the Claims interface.
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func (m MapClaims) GetIssuer() (string, error) {
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return m.parseString("iss")
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}
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// GetSubject implements the Claims interface.
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func (m MapClaims) GetSubject() (string, error) {
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return m.parseString("sub")
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}
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// parseNumericDate tries to parse a key in the map claims type as a number
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// date. This will succeed, if the underlying type is either a [float64] or a
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// [json.Number]. Otherwise, nil will be returned.
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func (m MapClaims) parseNumericDate(key string) (*NumericDate, error) {
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v, ok := m[key]
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if !ok {
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return nil, nil
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}
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switch exp := v.(type) {
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case float64:
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if exp == 0 {
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return nil, nil
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}
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return newNumericDateFromSeconds(exp), nil
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case json.Number:
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v, _ := exp.Float64()
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return newNumericDateFromSeconds(v), nil
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}
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return nil, newError(fmt.Sprintf("%s is invalid", key), ErrInvalidType)
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}
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// parseClaimsString tries to parse a key in the map claims type as a
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// [ClaimsStrings] type, which can either be a string or an array of string.
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func (m MapClaims) parseClaimsString(key string) (ClaimStrings, error) {
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var cs []string
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switch v := m[key].(type) {
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case string:
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cs = append(cs, v)
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case []string:
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cs = v
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case []interface{}:
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for _, a := range v {
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vs, ok := a.(string)
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if !ok {
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return nil, newError(fmt.Sprintf("%s is invalid", key), ErrInvalidType)
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}
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cs = append(cs, vs)
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}
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}
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return cs, nil
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}
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// parseString tries to parse a key in the map claims type as a [string] type.
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// If the key does not exist, an empty string is returned. If the key has the
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// wrong type, an error is returned.
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func (m MapClaims) parseString(key string) (string, error) {
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var (
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ok bool
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raw interface{}
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iss string
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)
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raw, ok = m[key]
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if !ok {
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return "", nil
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}
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iss, ok = raw.(string)
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if !ok {
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return "", newError(fmt.Sprintf("%s is invalid", key), ErrInvalidType)
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}
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return iss, nil
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}
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