| author | Michael Krelin <hacker@klever.net> | 2014-06-30 18:29:32 (UTC) |
|---|---|---|
| committer | Michael Krelin <hacker@klever.net> | 2014-06-30 18:29:32 (UTC) |
| commit | 44963f7c48fa76b2bbf1cc8b63b84519c0cc4c6e (patch) (side-by-side diff) | |
| tree | 341198729a5462ef560c06ae8a93bdb3c653acf2 | |
| parent | 9d4ae3e240e8d82a5e500c1bfbf3b4e8a43c62c6 (diff) | |
| download | clipperz-44963f7c48fa76b2bbf1cc8b63b84519c0cc4c6e.zip clipperz-44963f7c48fa76b2bbf1cc8b63b84519c0cc4c6e.tar.gz clipperz-44963f7c48fa76b2bbf1cc8b63b84519c0cc4c6e.tar.bz2 | |
reject zero A from the client (as per CLP-01-017)
| -rw-r--r-- | backend/node/src/clipperz.js | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/backend/node/src/clipperz.js b/backend/node/src/clipperz.js index 72b6c9f..842de31 100644 --- a/backend/node/src/clipperz.js +++ b/backend/node/src/clipperz.js @@ -170,12 +170,14 @@ var CLIPPERZ = module.exports = function(CONFIG) { if(!r.yes) return cb(new Error('OTP is in a sorry state')); cb(null,{ref:r.otp_ref}); }); }] },function(e,r) { if(e) return cb(e); + var A = BIGNUM(ppp.A,16); + if(A.eq(0)) return cb(new Error('Ground Zero')); req.session.C = ppp.C; req.session.A = ppp.A; req.session.s = r.u.u_srp_s; req.session.v = r.u.u_srp_v; req.session.u = r.u.u_id; req.session.b = clipperz_random(); req.session.B = srp_k.mul(BIGNUM(req.session.v,16)).add(srp_g.powm(BIGNUM(req.session.b,16),srp_n)).toString(16); var rv = {s:req.session.s,B:req.session.B} |