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| author | Never <[email protected]> | 2016-12-19 13:34:24 +0100 |
|---|---|---|
| committer | Never <[email protected]> | 2016-12-19 13:34:24 +0100 |
| commit | 037f037a10ec12f77600307d7012dcc27d3aa291 (patch) | |
| tree | 6357a8ec9b60ef0ed7bc41af17015f8821e9c7e3 | |
| parent | cb50b81a3d7098a864b99832354f9e2cdbbca965 (diff) | |
Added DH public key check y^q mod p = 1 against small-subgroup attacks as described in rfc2785
| -rw-r--r-- | src/lib/pubkey/dl_algo/dl_algo.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/lib/pubkey/dl_algo/dl_algo.cpp b/src/lib/pubkey/dl_algo/dl_algo.cpp index 8e885d318..472b979b1 100644 --- a/src/lib/pubkey/dl_algo/dl_algo.cpp +++ b/src/lib/pubkey/dl_algo/dl_algo.cpp @@ -67,6 +67,8 @@ bool DL_Scheme_PublicKey::check_key(RandomNumberGenerator& rng, return false; if(!m_group.verify_group(rng, strong)) return false; + if(power_mod(m_y,group_q(),group_p()) != 1) + return false; return true; } |