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Code Issues Releases Wiki Activity

mce signature size checks

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This commit is contained in:
Mirek Kratochvil 2012-05-22 22:03:42 +02:00
parent 2c7d4276cf
commit 31ef38bfa7
1 changed files with 3 additions and 3 deletions
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6
lib/mce.cpp
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@ -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