jwt/map_claims.go

90 lines
2.0 KiB
Go

package jwt
import (
"encoding/json"
)
// MapClaims is a claims type that uses the map[string]interface{} for JSON decoding.
// This is the default claims type if you don't supply one
type MapClaims map[string]interface{}
// GetExpirationTime implements the Claims interface.
func (m MapClaims) GetExpirationTime() *NumericDate {
return m.ParseNumericDate("exp")
}
// GetNotBefore implements the Claims interface.
func (m MapClaims) GetNotBefore() *NumericDate {
return m.ParseNumericDate("nbf")
}
// GetIssuedAt implements the Claims interface.
func (m MapClaims) GetIssuedAt() *NumericDate {
return m.ParseNumericDate("iat")
}
// GetAudience implements the Claims interface.
func (m MapClaims) GetAudience() ClaimStrings {
return m.ParseClaimsString("aud")
}
// GetIssuer implements the Claims interface.
func (m MapClaims) GetIssuer() string {
return m.ParseString("iss")
}
// ParseNumericDate tries to parse a key in the map claims type as a number
// date. This will succeed, if the underlying type is either a [float64] or a
// [json.Number]. Otherwise, nil will be returned.
func (m MapClaims) ParseNumericDate(key string) *NumericDate {
v, ok := m[key]
if !ok {
return nil
}
switch exp := v.(type) {
case float64:
if exp == 0 {
return nil
}
return newNumericDateFromSeconds(exp)
case json.Number:
v, _ := exp.Float64()
return newNumericDateFromSeconds(v)
}
return nil
}
// ParseClaimsString tries to parse a key in the map claims type as a
// [ClaimsStrings] type, which can either be a string or an array of string.
func (m MapClaims) ParseClaimsString(key string) ClaimStrings {
var cs []string
switch v := m[key].(type) {
case string:
cs = append(cs, v)
case []string:
cs = v
case []interface{}:
for _, a := range v {
vs, ok := a.(string)
if !ok {
return nil
}
cs = append(cs, vs)
}
}
return cs
}
// ParseString tries to parse a key in the map claims type as a
// [string] type. Otherwise, an empty string is returned.
func (m MapClaims) ParseString(key string) string {
iss, _ := m[key].(string)
return iss
}