From 31ef38bfa77018fa09358eaa36e9308491ed37e4 Mon Sep 17 00:00:00 2001 From: Mirek Kratochvil Date: Tue, 22 May 2012 22:03:42 +0200 Subject: [PATCH] mce signature size checks --- lib/mce.cpp | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/lib/mce.cpp b/lib/mce.cpp index b8526de..169cf5e 100644 --- a/lib/mce.cpp +++ b/lib/mce.cpp @@ -117,7 +117,7 @@ int privkey::sign (const bvector&in, bvector&out, uint delta, uint attempts, prn s = cipher_size(); - //TODO check sizes of everything! + if (in.size() != s) return 2; //first, prepare the codeword to canonical form for decoding Pinv.permute (in, e2); @@ -161,8 +161,8 @@ int privkey::sign (const bvector&in, bvector&out, uint delta, uint attempts, prn int pubkey::verify (const bvector&in, const bvector&hash, uint delta) { bvector tmp; - //TODO check sizes! - G.mult_vecT_left (in, tmp); + if (!G.mult_vecT_left (in, tmp) ) return 2; //wrong size of input + if (hash.size() != tmp.size() ) return 1; //wrong size of hash, not a sig. tmp.add (hash); if (tmp.hamming_weight() > (t + delta) ) return 1; //not a signature return 0; //sig OK