diff options
Diffstat (limited to 'src/lib/pubkey/dsa/dsa.cpp')
| -rw-r--r-- | src/lib/pubkey/dsa/dsa.cpp | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/src/lib/pubkey/dsa/dsa.cpp b/src/lib/pubkey/dsa/dsa.cpp index 471189cd8..c7d44c73a 100644 --- a/src/lib/pubkey/dsa/dsa.cpp +++ b/src/lib/pubkey/dsa/dsa.cpp @@ -1,6 +1,7 @@ /* * DSA * (C) 1999-2010,2014 Jack Lloyd +* (C) 2016 René Korthaus * * Botan is released under the Simplified BSD License (see license.txt) */ @@ -10,7 +11,9 @@ #include <botan/keypair.h> #include <botan/pow_mod.h> #include <botan/reducer.h> -#include <botan/rfc6979.h> +#if defined(BOTAN_HAS_RFC6979_GENERATOR) + #include <botan/rfc6979.h> +#endif #include <future> namespace Botan { @@ -84,7 +87,7 @@ class DSA_Signature_Operation : public PK_Ops::Signature_with_EMSA m_x(dsa.get_x()), m_powermod_g_p(dsa.group_g(), dsa.group_p()), m_mod_q(dsa.group_q()), - m_hash(hash_for_deterministic_signature(emsa)) + m_emsa(emsa) { } @@ -99,19 +102,23 @@ class DSA_Signature_Operation : public PK_Ops::Signature_with_EMSA const BigInt& m_x; Fixed_Base_Power_Mod m_powermod_g_p; Modular_Reducer m_mod_q; - std::string m_hash; + std::string m_emsa; }; secure_vector<byte> DSA_Signature_Operation::raw_sign(const byte msg[], size_t msg_len, - RandomNumberGenerator&) + RandomNumberGenerator& rng) { BigInt i(msg, msg_len); while(i >= m_q) i -= m_q; - const BigInt k = generate_rfc6979_nonce(m_x, m_q, i, m_hash); +#if defined(BOTAN_HAS_RFC6979_GENERATOR) + const BigInt k = generate_rfc6979_nonce(m_x, m_q, i, hash_for_deterministic_signature(m_emsa)); +#else + const BigInt k = BigInt::random_integer(rng, 1, m_q); +#endif auto future_r = std::async(std::launch::async, [&]() { return m_mod_q.reduce(m_powermod_g_p(k)); }); |