diff options
Diffstat (limited to 'src/lib/pubkey/dh/dh.cpp')
| -rw-r--r-- | src/lib/pubkey/dh/dh.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/lib/pubkey/dh/dh.cpp b/src/lib/pubkey/dh/dh.cpp index b8b09ec3f..fc1e6236a 100644 --- a/src/lib/pubkey/dh/dh.cpp +++ b/src/lib/pubkey/dh/dh.cpp @@ -105,14 +105,16 @@ class DH_KA_Operation final : public PK_Ops::Key_Agreement_with_KDF secure_vector<uint8_t> DH_KA_Operation::raw_agree(const uint8_t w[], size_t w_len) { - BigInt input = BigInt::decode(w, w_len); + BigInt x = BigInt::decode(w, w_len); - if(input <= 1 || input >= m_p - 1) + if(x <= 1 || x >= m_p - 1) throw Invalid_Argument("DH agreement - invalid key provided"); - BigInt r = m_blinder.unblind(m_powermod_x_p(m_blinder.blind(input))); + x = m_blinder.blind(x); + x = m_powermod_x_p(x); + x = m_blinder.unblind(x); - return BigInt::encode_1363(r, m_p.bytes()); + return BigInt::encode_1363(x, m_p.bytes()); } } |