JWTRefresh

Verifies an existing JWT and re-issues it with fresh iat, jti, and optionally a new exp. All application claims (sub, iss, aud, custom claims) are preserved.

Method Signature

JWTRefresh( token, [key], [algorithm], [options] )

Arguments

Argument	Type	Required	Description	Default
token	string	Yes	Existing compact JWS token to refresh.
key	any	No	Signing/verification key. Optional when defaults are configured.	null
algorithm	string	No	Algorithm to use for the new token.	null
options	struct	No	See options table below.	{}

Options

Option	Type	Description	Default
allowExpired	boolean	Allow refreshing an expired token. The signature is still verified.	false
expireIn	numeric	Seconds until the refreshed token expires.	null
headers	struct	JOSE headers to include in the new token (overrides originals).	{}
claims	struct	Optional claim assertions to enforce during verification before refreshing.	{}

Returns

A new compact JWS string with refreshed time claims.

Examples

// Standard refresh — token must still be valid
newToken = jwtRefresh( oldToken, secret, "HS256" );

// Refresh with a new 1-hour expiration
newToken = jwtRefresh( oldToken, secret, "HS256", { expireIn: 3600 } );

// Allow refreshing an expired token (grace period)
newToken = jwtRefresh( oldToken, secret, "HS256", {
    allowExpired : true,
    expireIn     : 3600
} );

Related

• JWTVerify()
• JWTCreate()
• Signing (JWS) Guide