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bulletproofs: reject points not in the main subgroup

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This commit is contained in:
moneromooo-monero 2018-06-29 15:03:00 +01:00
parent 1569717718
commit c429176248
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GPG key ID: 686F07454D6CEFC3
6 changed files with 97 additions and 0 deletions
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2
tests/performance_tests/crypto_ops.h
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@ -51,6 +51,7 @@ enum test_op
op_addKeys2,
op_addKeys3,
op_addKeys3_2,
op_isInMainSubgroup,
};
template<test_op op>
@ -102,6 +103,7 @@ public:
case op_addKeys2: rct::addKeys2(key, scalar0, scalar1, point0); break;
case op_addKeys3: rct::addKeys3(key, scalar0, point0, scalar1, precomp1); break;
case op_addKeys3_2: rct::addKeys3(key, scalar0, precomp0, scalar1, precomp1); break;
case op_isInMainSubgroup: rct::isInMainSubgroup(point0); break;
default: return false;
}
return true;

1
tests/performance_tests/main.cpp
View file

@ -237,6 +237,7 @@ int main(int argc, char** argv)
TEST_PERFORMANCE1(filter, p, test_crypto_ops, op_addKeys2);
TEST_PERFORMANCE1(filter, p, test_crypto_ops, op_addKeys3);
TEST_PERFORMANCE1(filter, p, test_crypto_ops, op_addKeys3_2);
TEST_PERFORMANCE1(filter, p, test_crypto_ops, op_isInMainSubgroup);
TEST_PERFORMANCE2(filter, p, test_multiexp, multiexp_bos_coster, 2);
TEST_PERFORMANCE2(filter, p, test_multiexp, multiexp_bos_coster, 4);

61
tests/unit_tests/bulletproofs.cpp
View file

@ -30,6 +30,7 @@
#include "gtest/gtest.h"
#include "string_tools.h"
#include "ringct/rctOps.h"
#include "ringct/rctSigs.h"
#include "ringct/bulletproofs.h"
@ -193,3 +194,63 @@ TEST(bulletproofs, invalid_gamma_ff)
rct::Bulletproof proof = bulletproof_PROVE(invalid_amount, gamma);
ASSERT_FALSE(rct::bulletproof_VERIFY(proof));
}
static const char * const torsion_elements[] =
{
"c7176a703d4dd84fba3c0b760d10670f2a2053fa2c39ccc64ec7fd7792ac03fa",
"0000000000000000000000000000000000000000000000000000000000000000",
"26e8958fc2b227b045c3f489f2ef98f0d5dfac05d3c63339b13802886d53fc85",
"ecffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f",
"26e8958fc2b227b045c3f489f2ef98f0d5dfac05d3c63339b13802886d53fc05",
"0000000000000000000000000000000000000000000000000000000000000080",
"c7176a703d4dd84fba3c0b760d10670f2a2053fa2c39ccc64ec7fd7792ac037a",
};
TEST(bulletproofs, invalid_torsion)
{
rct::Bulletproof proof = bulletproof_PROVE(7329838943733, rct::skGen());
ASSERT_TRUE(rct::bulletproof_VERIFY(proof));
for (const auto &xs: torsion_elements)
{
rct::key x;
ASSERT_TRUE(epee::string_tools::hex_to_pod(xs, x));
ASSERT_FALSE(rct::isInMainSubgroup(x));
for (auto &k: proof.V)
{
const rct::key org_k = k;
rct::addKeys(k, org_k, x);
ASSERT_FALSE(rct::bulletproof_VERIFY(proof));
k = org_k;
}
for (auto &k: proof.L)
{
const rct::key org_k = k;
rct::addKeys(k, org_k, x);
ASSERT_FALSE(rct::bulletproof_VERIFY(proof));
k = org_k;
}
for (auto &k: proof.R)
{
const rct::key org_k = k;
rct::addKeys(k, org_k, x);
ASSERT_FALSE(rct::bulletproof_VERIFY(proof));
k = org_k;
}
const rct::key org_A = proof.A;
rct::addKeys(proof.A, org_A, x);
ASSERT_FALSE(rct::bulletproof_VERIFY(proof));
proof.A = org_A;
const rct::key org_S = proof.S;
rct::addKeys(proof.S, org_S, x);
ASSERT_FALSE(rct::bulletproof_VERIFY(proof));
proof.S = org_S;
const rct::key org_T1 = proof.T1;
rct::addKeys(proof.T1, org_T1, x);
ASSERT_FALSE(rct::bulletproof_VERIFY(proof));
proof.T1 = org_T1;
const rct::key org_T2 = proof.T2;
rct::addKeys(proof.T2, org_T2, x);
ASSERT_FALSE(rct::bulletproof_VERIFY(proof));
proof.T2 = org_T2;
}
}