8 #include <botan/ecgdsa.h>
9 #include <botan/keypair.h>
10 #include <botan/reducer.h>
11 #include <botan/internal/pk_ops_impl.h>
37 const std::string& emsa) :
38 PK_Ops::Signature_with_EMSA(emsa),
39 m_order(ecgdsa.domain().get_order()),
41 m_x(ecgdsa.private_value()),
46 secure_vector<uint8_t> raw_sign(
const uint8_t msg[],
size_t msg_len,
47 RandomNumberGenerator& rng)
override;
49 size_t max_input_bits()
const override {
return m_order.bits(); }
58 secure_vector<uint8_t>
59 ECGDSA_Signature_Operation::raw_sign(
const uint8_t msg[],
size_t msg_len,
60 RandomNumberGenerator& rng)
62 const BigInt m(msg, msg_len);
80 class ECGDSA_Verification_Operation :
public PK_Ops::Verification_with_EMSA
84 ECGDSA_Verification_Operation(
const ECGDSA_PublicKey& ecgdsa,
85 const std::string& emsa) :
86 PK_Ops::Verification_with_EMSA(emsa),
89 m_order(ecgdsa.domain().get_order()),
94 size_t max_input_bits()
const override {
return m_order.bits(); }
96 bool with_recovery()
const override {
return false; }
98 bool verify(
const uint8_t msg[],
size_t msg_len,
99 const uint8_t sig[],
size_t sig_len)
override;
108 bool ECGDSA_Verification_Operation::verify(
const uint8_t msg[],
size_t msg_len,
109 const uint8_t sig[],
size_t sig_len)
114 BigInt e(msg, msg_len);
116 BigInt r(sig, sig_len / 2);
117 BigInt s(sig + sig_len / 2, sig_len / 2);
137 std::unique_ptr<PK_Ops::Verification>
139 const std::string& provider)
const
141 if(provider ==
"base" || provider.empty())
142 return std::unique_ptr<PK_Ops::Verification>(
new ECGDSA_Verification_Operation(*
this, params));
146 std::unique_ptr<PK_Ops::Signature>
148 const std::string& params,
149 const std::string& provider)
const
151 if(provider ==
"base" || provider.empty())
152 return std::unique_ptr<PK_Ops::Signature>(
new ECGDSA_Signature_Operation(*
this, params));
std::string algo_name() const override
Modular_Reducer m_mod_order
std::unique_ptr< PK_Ops::Signature > create_signature_op(RandomNumberGenerator &rng, const std::string ¶ms, const std::string &provider) const override
static BigInt random_integer(RandomNumberGenerator &rng, const BigInt &min, const BigInt &max)
std::unique_ptr< PK_Ops::Verification > create_verification_op(const std::string ¶ms, const std::string &provider) const override
const PointGFp & public_point() const
#define BOTAN_ASSERT(expr, assertion_made)
Blinded_Point_Multiply m_base_point
BigInt multiply(const BigInt &x, const BigInt &y) const
PointGFp blinded_multiply(const BigInt &scalar, RandomNumberGenerator &rng)
bool signature_consistency_check(RandomNumberGenerator &rng, const Private_Key &private_key, const Public_Key &public_key, const std::string &padding)
BigInt reduce(const BigInt &x) const
const PointGFp & m_public_point
BigInt inverse_mod(const BigInt &n, const BigInt &mod)
bool check_key(RandomNumberGenerator &rng, bool) const override
static secure_vector< uint8_t > encode_fixed_length_int_pair(const BigInt &n1, const BigInt &n2, size_t bytes)
PointGFp multi_exponentiate(const PointGFp &p1, const BigInt &z1, const PointGFp &p2, const BigInt &z2)
BigInt mul_sub(const BigInt &a, const BigInt &b, const BigInt &c)