asp.net web api - Secure JSON Web Token in Web API / MVC 6 -


the security concerns: according https://auth0.com/blog/2015/03/31/critical-vulnerabilities-in-json-web-token-libraries/ lot of jwt libraries use token in order determine algorithm signature.

this our use case: want create login mechanism validates user hard credentials (username/password) , return jwt token e.g. 3 days lifetime. token should contain username , signature should guarantee token cannot "faked".

what library can use in web api / mvc 6? important signature algorithm can specified on decoding avoid vulnerability.

if possible avoid integrating complex oauth components.

i using system.identitymodel.tokens.jwt library, , checked issue. generated token , validated in 1 of tests, removed signingcredentials changes alg none. jwt generated "alg":"none" failed validation.

here how generating token:

public string generatetoken(ssocontext context, signaturesettings settings) {     var token = new jwtsecuritytoken(         issuer: "myissuer",         audience: "myaudience",         claims: getclaims(context),         //comment below line generate 'none' alg         signingcredentials: new x509signingcredentials(settings.certificate),         notbefore: datetime.utcnow,         expires: datetime.utcnow.addhours(1)         );      return new jwtsecuritytokenhandler().writetoken(token); } 

when validate token exception expected message

idx10504: unable validate signature, token not have signature:


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