/
factory.go
79 lines (63 loc) · 1.39 KB
/
factory.go
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package jwt
import "strings"
type Factory struct {
algorithm Algorithm
jwk *JWK
claimType Claimer
}
func NewFactory(alg Algorithm, jwk *JWK, claimType Claimer) (*Factory, error) {
if err := CheckAlgorithm(alg); err != nil {
return nil, err
}
if alg == AlgNone && jwk != nil {
return nil, errAlgNoneWithKey
}
f := &Factory{
algorithm: alg,
jwk: jwk,
}
if claimType == nil {
f.claimType = &RegisteredClaims{}
} else {
f.claimType = claimType
}
return f, nil
}
func (f *Factory) New(claims Claimer) (*jsonWebToken, error) {
return &jsonWebToken{
claims: claims,
factory: f,
}, nil
}
func (f *Factory) Verify(token string) (*jsonWebToken, error) {
j, err := f.Decode(token)
if err != nil {
return nil, err
}
return j, nil
}
func (f *Factory) Decode(token string) (*jsonWebToken, error) {
parts := strings.Split(token, ".")
switch {
case len(parts) < 2:
return nil, &ErrDecoding{Part: "encoded token", Err: errNotEnoughParts}
case len(parts) > 3:
return nil, &ErrDecoding{Part: "encoded token", Err: errTooManyParts}
}
j := &jsonWebToken{
factory: f,
}
if err := j.decodeParts(parts[0], parts[1]); err != nil {
return nil, err
}
verifier, err := j.factory.New(j.claims)
if err != nil {
return nil, err
}
if vt, err := verifier.Encode(); err != nil {
return nil, err
} else if vt != token {
return nil, ErrVerifyFail
}
return j, nil
}