public void xeddsa_fast_test()
{
byte[] signature_correct = new byte[]
{
0x11, 0xc7, 0xf3, 0xe6, 0xc4, 0xdf, 0x9e, 0x8a,
0x51, 0x50, 0xe1, 0xdb, 0x3b, 0x30, 0xf9, 0x2d,
0xe3, 0xa3, 0xb3, 0xaa, 0x43, 0x86, 0x56, 0x54,
0x5f, 0xa7, 0x39, 0x0f, 0x4b, 0xcc, 0x7b, 0xb2,
0x6c, 0x43, 0x1d, 0x9e, 0x90, 0x64, 0x3e, 0x4f,
0x0e, 0xaa, 0x0e, 0x9c, 0x55, 0x77, 0x66, 0xfa,
0x69, 0xad, 0xa5, 0x76, 0xd6, 0x3d, 0xca, 0xf2,
0xac, 0x32, 0x6c, 0x11, 0xd0, 0xb9, 0x77, 0x02,
};
const int MSG_LEN = 200;
byte[] privkey = new byte[32];
byte[] pubkey = new byte[32];
byte[] signature = new byte[64];
byte[] msg = new byte[MSG_LEN];
byte[] random = new byte[64];
privkey[8] = 189; /* just so there's some bits set */
Sc_clamp.sc_clamp(privkey);
/* Signature vector test */
Keygen.curve25519_keygen(pubkey, privkey);
ISha512 sha512provider = new BouncyCastleDotNETSha512Provider();
xeddsa.xed25519_sign(sha512provider, signature, privkey, msg, MSG_LEN, random);
CollectionAssert.AreEqual(signature_correct, signature, "XEdDSA sign");
Assert.AreEqual(0, xeddsa.xed25519_verify(sha512provider, signature, pubkey, msg, MSG_LEN), "XEdDSA verify #1");
signature[0] ^= 1;
Assert.AreNotEqual(0, xeddsa.xed25519_verify(sha512provider, signature, pubkey, msg, MSG_LEN), "XEdDSA verify #2");
}
public void curvesigs_fast_test()
{
byte[] signature_correct = new byte[]
{
0xcf, 0x87, 0x3d, 0x03, 0x79, 0xac, 0x20, 0xe8,
0x89, 0x3e, 0x55, 0x67, 0xee, 0x0f, 0x89, 0x51,
0xf8, 0xdb, 0x84, 0x0d, 0x26, 0xb2, 0x43, 0xb4,
0x63, 0x52, 0x66, 0x89, 0xd0, 0x1c, 0xa7, 0x18,
0xac, 0x18, 0x9f, 0xb1, 0x67, 0x85, 0x74, 0xeb,
0xdd, 0xe5, 0x69, 0x33, 0x06, 0x59, 0x44, 0x8b,
0x0b, 0xd6, 0xc1, 0x97, 0x3f, 0x7d, 0x78, 0x0a,
0xb3, 0x95, 0x18, 0x62, 0x68, 0x03, 0xd7, 0x82,
};
const int MSG_LEN = 200;
byte[] privkey = new byte[32];
byte[] pubkey = new byte[32];
byte[] signature = new byte[64];
byte[] msg = new byte[MSG_LEN];
byte[] random = new byte[64];
privkey[8] = 189; /* just so there's some bits set */
Sc_clamp.sc_clamp(privkey);
/* Signature vector test */
Keygen.curve25519_keygen(pubkey, privkey);
ISha512 sha512provider = new BouncyCastleDotNETSha512Provider();
Curve_sigs.curve25519_sign(sha512provider, signature, privkey, msg, MSG_LEN, random);
CollectionAssert.AreEqual(signature_correct, signature, "Curvesig sign");
Assert.AreEqual(0, Curve_sigs.curve25519_verify(sha512provider, signature, pubkey, msg, MSG_LEN), "Curvesig verify #1");
signature[0] ^= 1;
Assert.AreNotEqual(0, Curve_sigs.curve25519_verify(sha512provider, signature, pubkey, msg, MSG_LEN), "Curvesig verify #2");
}
public void elligator_fast_test()
{
byte[] elligator_correct_output = new byte[]
{
0x5f, 0x35, 0x20, 0x00, 0x1c, 0x6c, 0x99, 0x36,
0xa3, 0x12, 0x06, 0xaf, 0xe7, 0xc7, 0xac, 0x22,
0x4e, 0x88, 0x61, 0x61, 0x9b, 0xf9, 0x88, 0x72,
0x44, 0x49, 0x15, 0x89, 0x9d, 0x95, 0xf4, 0x6e
};
byte[] hashtopoint_correct_output1 = new byte[]
{
0xce, 0x89, 0x9f, 0xb2, 0x8f, 0xf7, 0x20, 0x91,
0x5e, 0x14, 0xf5, 0xb7, 0x99, 0x08, 0xab, 0x17,
0xaa, 0x2e, 0xe2, 0x45, 0xb4, 0xfc, 0x2b, 0xf6,
0x06, 0x36, 0x29, 0x40, 0xed, 0x7d, 0xe7, 0xed
};
byte[] hashtopoint_correct_output2 = new byte[]
{
0xa0, 0x35, 0xbb, 0xa9, 0x4d, 0x30, 0x55, 0x33,
0x0d, 0xce, 0xc2, 0x7f, 0x83, 0xde, 0x79, 0xd0,
0x89, 0x67, 0x72, 0x4c, 0x07, 0x8d, 0x68, 0x9d,
0x61, 0x52, 0x1d, 0xf9, 0x2c, 0x5c, 0xba, 0x77
};
byte[] calculatev_correct_output = new byte[]
{
0x1b, 0x77, 0xb5, 0xa0, 0x44, 0x84, 0x7e, 0xb9,
0x23, 0xd7, 0x93, 0x18, 0xce, 0xc2, 0xc5, 0xe2,
0x84, 0xd5, 0x79, 0x6f, 0x65, 0x63, 0x1b, 0x60,
0x9b, 0xf1, 0xf8, 0xce, 0x88, 0x0b, 0x50, 0x9c,
};
int count;
int[] iIn = new int[10];
int[] iOut = new int[10];
byte[] bytes = new byte[32];
Fe_0.fe_0(iIn);
Fe_0.fe_0(iOut);
for (count = 0; count < 32; count++)
{
bytes[count] = (byte)count;
}
Fe_frombytes.fe_frombytes(iIn, bytes);
Elligator.elligator(iOut, iIn);
Fe_tobytes.fe_tobytes(bytes, iOut);
CollectionAssert.AreEqual(elligator_correct_output, bytes, "Elligator vector");
/* Elligator(0) == 0 test */
Fe_0.fe_0(iIn);
Elligator.elligator(iOut, iIn);
CollectionAssert.AreEqual(iOut, iIn, "Elligator(0) == 0");
/* ge_montx_to_p3(0) -> order2 point test */
int[] one = new int[10];
int[] negone = new int[10];
int[] zero = new int[10];
Fe_1.fe_1(one);
Fe_0.fe_0(zero);
Fe_sub.fe_sub(negone, zero, one);
Ge_p3 p3 = new Ge_p3();
Ge_montx_to_p3.ge_montx_to_p3(p3, zero, 0);
Assert.IsTrue(Fe_isequal.fe_isequal(p3.X, zero) != 0 &&
Fe_isequal.fe_isequal(p3.Y, negone) != 0 &&
Fe_isequal.fe_isequal(p3.Z, one) != 0 &&
Fe_isequal.fe_isequal(p3.T, zero) != 0,
"ge_montx_to_p3(0) == order 2 point");
/* Hash to point vector test */
byte[] htp = new byte[32];
for (count = 0; count < 32; count++)
{
htp[count] = (byte)count;
}
ISha512 sha512provider = new BouncyCastleDotNETSha512Provider();
Elligator.hash_to_point(sha512provider, p3, htp, 32);
Ge_p3_tobytes.ge_p3_tobytes(htp, p3);
CollectionAssert.AreEqual(hashtopoint_correct_output1, htp, "hash_to_point #1");
for (count = 0; count < 32; count++)
{
htp[count] = (byte)(count + 1);
}
Elligator.hash_to_point(sha512provider, p3, htp, 32);
Ge_p3_tobytes.ge_p3_tobytes(htp, p3);
CollectionAssert.AreEqual(hashtopoint_correct_output2, htp, "hash_to_point #2");
/* calculate_U vector test */
Ge_p3 Bv = new Ge_p3();
byte[] V = new byte[32];
byte[] Vbuf = new byte[200];
byte[] a = new byte[32];
byte[] A = new byte[32];
byte[] Vmsg = new byte[3];
Vmsg[0] = 0;
Vmsg[1] = 1;
Vmsg[2] = 2;
for (count = 0; count < 32; count++)
{
a[count] = (byte)(8 + count);
A[count] = (byte)(9 + count);
}
Sc_clamp.sc_clamp(a);
Elligator.calculate_Bv_and_V(sha512provider, Bv, V, Vbuf, a, A, Vmsg, 3);
CollectionAssert.AreEqual(calculatev_correct_output, V, "calculate_Bv_and_V vector");
}
public void vxeddsa_slow_test()
{
int iterations = 10000000;
//int iterations = 100000;
byte[] signature_10k_correct = new byte[]
{
0xa1, 0x96, 0x96, 0xe5, 0x87, 0x3f, 0x6e, 0x5c,
0x2e, 0xd3, 0x73, 0xab, 0x04, 0x0c, 0x1f, 0x26,
0x3c, 0xca, 0x52, 0xc4, 0x7e, 0x49, 0xaa, 0xce,
0xb5, 0xd6, 0xa2, 0x29, 0x46, 0x3f, 0x1b, 0x54,
0x45, 0x94, 0x9b, 0x6c, 0x27, 0xf9, 0x2a, 0xed,
0x17, 0xa4, 0x72, 0xbf, 0x35, 0x37, 0xc1, 0x90,
0xac, 0xb3, 0xfd, 0x2d, 0xf1, 0x01, 0x05, 0xbe,
0x56, 0x5c, 0xaf, 0x63, 0x65, 0xad, 0x38, 0x04,
0x70, 0x53, 0xdf, 0x2b, 0xc1, 0x45, 0xc8, 0xee,
0x02, 0x0d, 0x2b, 0x22, 0x23, 0x7a, 0xbf, 0xfa,
0x43, 0x31, 0xb3, 0xac, 0x26, 0xd9, 0x76, 0xfc,
0xfe, 0x30, 0xa1, 0x7c, 0xce, 0x10, 0x67, 0x0e,
};
byte[] signature_100k_correct = new byte[]
{
0xc9, 0x11, 0x2b, 0x55, 0xfa, 0xc4, 0xb2, 0xfe,
0x00, 0x7d, 0xf6, 0x45, 0xcb, 0xd2, 0x73, 0xc9,
0x43, 0xba, 0x20, 0xf6, 0x9c, 0x18, 0x84, 0xef,
0x6c, 0x65, 0x7a, 0xdb, 0x49, 0xfc, 0x1e, 0xbe,
0x31, 0xb3, 0xe6, 0xa4, 0x68, 0x2f, 0xd0, 0x30,
0x81, 0xfc, 0x0d, 0xcd, 0x2d, 0x00, 0xab, 0xae,
0x9f, 0x08, 0xf0, 0x99, 0xff, 0x9f, 0xdc, 0x2d,
0x68, 0xd6, 0xe7, 0xe8, 0x44, 0x2a, 0x5b, 0x0e,
0x48, 0x67, 0xe2, 0x41, 0x4a, 0xd9, 0x0c, 0x2a,
0x2b, 0x4e, 0x66, 0x09, 0x87, 0xa0, 0x6b, 0x3b,
0xd1, 0xd9, 0xa3, 0xe3, 0xa5, 0x69, 0xed, 0xc1,
0x42, 0x03, 0x93, 0x0d, 0xbc, 0x7e, 0xe9, 0x08,
};
byte[] signature_1m_correct = new byte[]
{
0xf8, 0xb1, 0x20, 0xf2, 0x1e, 0x5c, 0xbf, 0x5f,
0xea, 0x07, 0xcb, 0xb5, 0x77, 0xb8, 0x03, 0xbc,
0xcb, 0x6d, 0xf1, 0xc1, 0xa5, 0x03, 0x05, 0x7b,
0x01, 0x63, 0x9b, 0xf9, 0xed, 0x3e, 0x57, 0x47,
0xd2, 0x5b, 0xf4, 0x7e, 0x7c, 0x45, 0xce, 0xfc,
0x06, 0xb3, 0xf4, 0x05, 0x81, 0x9f, 0x53, 0xb0,
0x18, 0xe3, 0xfa, 0xcb, 0xb2, 0x52, 0x3e, 0x57,
0xcb, 0x34, 0xcc, 0x81, 0x60, 0xb9, 0x0b, 0x04,
0x07, 0x79, 0xc0, 0x53, 0xad, 0xc4, 0x4b, 0xd0,
0xb5, 0x7d, 0x95, 0x4e, 0xbe, 0xa5, 0x75, 0x0c,
0xd4, 0xbf, 0xa7, 0xc0, 0xcf, 0xba, 0xe7, 0x7c,
0xe2, 0x90, 0xef, 0x61, 0xa9, 0x29, 0x66, 0x0d,
};
byte[] signature_10m_correct = new byte[]
{
0xf5, 0xa4, 0xbc, 0xec, 0xc3, 0x3d, 0xd0, 0x43,
0xd2, 0x81, 0x27, 0x9e, 0xf0, 0x4c, 0xbe, 0xf3,
0x77, 0x01, 0x56, 0x41, 0x0e, 0xff, 0x0c, 0xb9,
0x66, 0xec, 0x4d, 0xe0, 0xb7, 0x25, 0x63, 0x6b,
0x5c, 0x08, 0x39, 0x80, 0x4e, 0x37, 0x1b, 0x2c,
0x46, 0x6f, 0x86, 0x99, 0x1c, 0x4e, 0x31, 0x60,
0xdb, 0x4c, 0xfe, 0xc5, 0xa2, 0x4d, 0x71, 0x2b,
0xd6, 0xd0, 0xc3, 0x98, 0x88, 0xdb, 0x0e, 0x0c,
0x68, 0x4a, 0xd3, 0xc7, 0x56, 0xac, 0x8d, 0x95,
0x7b, 0xbd, 0x99, 0x50, 0xe8, 0xd3, 0xea, 0xf3,
0x7b, 0x26, 0xf2, 0xa2, 0x2b, 0x02, 0x58, 0xca,
0xbd, 0x2c, 0x2b, 0xf7, 0x77, 0x58, 0xfe, 0x09,
};
int count;
const int MSG_LEN = 200;
byte[] privkey = new byte[32];
byte[] pubkey = new byte[32];
byte[] signature = new byte[96];
byte[] msg = new byte[MSG_LEN];
byte[] random = new byte[64];
byte[] vrf_out = new byte[32];
for (int i = 0; i < 96; i++)
{
signature[i] = 3;
}
Debug.WriteLine("Pseudorandom VXEdDSA...");
for (count = 1; count <= iterations; count++)
{
byte[] b = new byte[64];
ISha512 sha512provider = new BouncyCastleDotNETSha512Provider();
sha512provider.calculateDigest(b, signature, 96);
Array.Copy(b, 0, privkey, 0, 32);
sha512provider.calculateDigest(b, privkey, 32);
Array.Copy(b, 0, random, 0, 64);
Sc_clamp.sc_clamp(privkey);
Keygen.curve25519_keygen(pubkey, privkey);
vxeddsa.vxed25510_sign(sha512provider, signature, privkey, msg, MSG_LEN, random);
Assert.AreEqual(0, vxeddsa.vxed25519_verify(sha512provider, vrf_out, signature, pubkey, msg, MSG_LEN), $"VXEdDSA verify failure #1 {count}");
if ((b[63] & 1) != 0)
{
signature[count % 96] ^= 1;
}
else
{
msg[count % MSG_LEN] ^= 1;
}
Assert.AreNotEqual(0, vxeddsa.vxed25519_verify(sha512provider, vrf_out, signature, pubkey, msg, MSG_LEN), $"VXEdDSA verify failure #2 {count}");
//if (count == 10000)
// print_bytes("10K VXEdDSA", signature, 96);
//if (count == 100000)
// print_bytes("100K VXEdDSA", signature, 96);
//if (count == 1000000)
// print_bytes("1M VXEdDSA", signature, 96);
//if (count == 10000000)
// print_bytes("10M VXEdDSA", signature, 96);
//if (count == 100000000)
// print_bytes("100M VXEdDSA", signature, 96);
if (count == 10000)
{
CollectionAssert.AreEqual(signature_10k_correct, signature, $"VXEdDSA 10K doesn't match {count}");
}
if (count == 100000)
{
CollectionAssert.AreEqual(signature_100k_correct, signature, $"VXEdDSA 100K doesn't match {count}");
}
if (count == 1000000)
{
CollectionAssert.AreEqual(signature_1m_correct, signature, $"VXEdDSA 1m doesn't match {count}");
}
if (count == 10000000)
{
CollectionAssert.AreEqual(signature_10m_correct, signature, $"VXEdDSA 10m doesn't match {count}");
}
/*
* if (count == 100000000) {
* if (memcmp(signature, signature_100m_correct, 96) != 0)
* ERROR("VXEDDSA 100m doesn't match %d\n", count);
* }
*/
}
}
public void xeddsa_to_curvesigs_slow_test()
{
int iterations = 10000;
byte[] signature_10k_correct = new byte[]
{
0x33, 0x50, 0xa8, 0x68, 0xcd, 0x9e, 0x74, 0x99,
0xa3, 0x5c, 0x33, 0x75, 0x2b, 0x22, 0x03, 0xf8,
0xb5, 0x0f, 0xea, 0x8c, 0x33, 0x1c, 0x68, 0x8b,
0xbb, 0xf3, 0x31, 0xcf, 0x7c, 0x42, 0x37, 0x35,
0xa0, 0x0e, 0x15, 0xb8, 0x5d, 0x2b, 0xe1, 0xa2,
0x03, 0x77, 0x94, 0x3d, 0x13, 0x5c, 0xd4, 0x9b,
0x6a, 0x31, 0xf4, 0xdc, 0xfe, 0x24, 0xad, 0x54,
0xeb, 0xd2, 0x98, 0x47, 0xf1, 0xcc, 0xbf, 0x0d
};
int count;
const int MSG_LEN = 200;
byte[] privkey = new byte[32];
byte[] pubkey = new byte[32];
byte[] signature = new byte[96];
byte[] msg = new byte[MSG_LEN];
byte[] random = new byte[64];
for (int i = 0; i < 64; i++)
{
signature[i] = 2;
}
/* Signature random test */
Debug.WriteLine("Pseudorandom XEdDSA/Curvesigs...");
for (count = 1; count <= iterations; count++)
{
byte[] b = new byte[64];
ISha512 sha512provider = new BouncyCastleDotNETSha512Provider();
sha512provider.calculateDigest(b, signature, 64);
Array.Copy(b, 0, privkey, 0, 32);
sha512provider.calculateDigest(b, privkey, 32);
Array.Copy(b, 0, random, 0, 64);
Sc_clamp.sc_clamp(privkey);
Keygen.curve25519_keygen(pubkey, privkey);
xeddsa.xed25519_sign(sha512provider, signature, privkey, msg, MSG_LEN, random);
Assert.AreEqual(0, Curve_sigs.curve25519_verify(sha512provider, signature, pubkey, msg, MSG_LEN), $"XEdDSA/Curvesigs verify failure #1 {count}");
if ((b[63] & 1) != 0)
{
signature[count % 64] ^= 1;
}
else
{
msg[count % MSG_LEN] ^= 1;
}
Assert.AreNotEqual(0, Curve_sigs.curve25519_verify(sha512provider, signature, pubkey, msg, MSG_LEN), $"XEdDSA/Curvesigs verify failure #2 {count}");
if (count == 10000)
{
byte[] sig0 = new byte[64];
Array.Copy(signature, 0, sig0, 0, 64);
CollectionAssert.AreEqual(signature_10k_correct, sig0, $"XEdDSA/Curvesigs signature 10K doesn't match {count}");
}
if (count == 100000)
{
//utility.print_bytes("100K XEdDSA/C", signature, 64);
}
if (count == 1000000)
{
//utility.print_bytes("1M XEdDSA/C", signature, 64);
}
if (count == 10000000)
{
//utility.print_bytes("10M XEdDSA/C", signature, 64);
}
}
}
public void xeddsa_slow_test()
{
int iterations = 10000;
byte[] signature_10k_correct = new byte[]
{
0x15, 0x29, 0x03, 0x38, 0x66, 0x16, 0xcd, 0x26,
0xbb, 0x3e, 0xec, 0xe2, 0x9f, 0x72, 0xa2, 0x5c,
0x7d, 0x05, 0xc9, 0xcb, 0x84, 0x3f, 0x92, 0x96,
0xb3, 0xfb, 0xb9, 0xdd, 0xd6, 0xed, 0x99, 0x04,
0xc1, 0xa8, 0x02, 0x16, 0xcf, 0x49, 0x3f, 0xf1,
0xbe, 0x69, 0xf9, 0xf1, 0xcc, 0x16, 0xd7, 0xdc,
0x6e, 0xd3, 0x78, 0xaa, 0x04, 0xeb, 0x71, 0x51,
0x9d, 0xe8, 0x7a, 0x5b, 0xd8, 0x49, 0x7b, 0x05,
};
int count;
const int MSG_LEN = 200;
byte[] privkey = new byte[32];
byte[] pubkey = new byte[32];
byte[] signature = new byte[96];
byte[] msg = new byte[MSG_LEN];
byte[] random = new byte[64];
for (int i = 0; i < 64; i++)
{
signature[i] = 1;
}
/* Signature random test */
Debug.WriteLine("Pseudorandom XEdDSA...");
for (count = 1; count <= iterations; count++)
{
byte[] b = new byte[64];
ISha512 sha512provider = new BouncyCastleDotNETSha512Provider();
sha512provider.calculateDigest(b, signature, 64);
Array.Copy(b, 0, privkey, 0, 32);
sha512provider.calculateDigest(b, privkey, 32);
Array.Copy(b, 0, random, 0, 64);
Sc_clamp.sc_clamp(privkey);
Keygen.curve25519_keygen(pubkey, privkey);
xeddsa.xed25519_sign(sha512provider, signature, privkey, msg, MSG_LEN, random);
Assert.AreEqual(0, xeddsa.xed25519_verify(sha512provider, signature, pubkey, msg, MSG_LEN), $"XEdDSA verify failure #1 {count}");
if ((b[63] & 1) != 0)
{
signature[count % 64] ^= 1;
}
else
{
msg[count % MSG_LEN] ^= 1;
}
Assert.AreNotEqual(0, xeddsa.xed25519_verify(sha512provider, signature, pubkey, msg, MSG_LEN), $"XEdDSA verify failure #2 {count}");
if (count == 10000)
{
byte[] sig0 = new byte[64];
Array.Copy(signature, 0, sig0, 0, 64);
CollectionAssert.AreEqual(signature_10k_correct, sig0, $"XEdDSA signature 10K doesn't match {count}");
}
}
}
public void curvesigs_slow_test()
{
int iterations = 10000;
byte[] signature_10k_correct = new byte[]
{
0xfc, 0xba, 0x55, 0xc4, 0x85, 0x4a, 0x42, 0x25,
0x19, 0xab, 0x08, 0x8d, 0xfe, 0xb5, 0x13, 0xb6,
0x0d, 0x24, 0xbb, 0x16, 0x27, 0x55, 0x71, 0x48,
0xdd, 0x20, 0xb1, 0xcd, 0x2a, 0xd6, 0x7e, 0x35,
0xef, 0x33, 0x4c, 0x7b, 0x6d, 0x94, 0x6f, 0x52,
0xec, 0x43, 0xd7, 0xe6, 0x35, 0x24, 0xcd, 0x5b,
0x5d, 0xdc, 0xb2, 0x32, 0xc6, 0x22, 0x53, 0xf3,
0x38, 0x02, 0xf8, 0x28, 0x28, 0xc5, 0x65, 0x05,
};
int count;
const int MSG_LEN = 200;
byte[] privkey = new byte[32];
byte[] pubkey = new byte[32];
byte[] signature = new byte[64];
byte[] msg = new byte[MSG_LEN];
byte[] random = new byte[64];
/* Signature random test */
Debug.WriteLine("Pseudorandom curvesigs...");
for (count = 1; count <= iterations; count++)
{
byte[] b = new byte[64];
ISha512 sha512provider = new BouncyCastleDotNETSha512Provider();
sha512provider.calculateDigest(b, signature, 64);
Array.Copy(b, 0, privkey, 0, 32);
sha512provider.calculateDigest(b, privkey, 32);
Array.Copy(b, 0, random, 0, 64);
Sc_clamp.sc_clamp(privkey);
Keygen.curve25519_keygen(pubkey, privkey);
Curve_sigs.curve25519_sign(sha512provider, signature, privkey, msg, MSG_LEN, random);
Assert.AreEqual(0, Curve_sigs.curve25519_verify(sha512provider, signature, pubkey, msg, MSG_LEN), $"Curvesig verify failure #1 {count}");
if ((b[63] & 1) != 0)
{
signature[count % 64] ^= 1;
}
else
{
msg[count % MSG_LEN] ^= 1;
}
Assert.AreNotEqual(0, Curve_sigs.curve25519_verify(sha512provider, signature, pubkey, msg, MSG_LEN), $"Curvesig verify failure #2 {count}");
if (count == 10000)
{
CollectionAssert.AreEqual(signature_10k_correct, signature, $"Curvesig signature 10K doesn't match {count}");
}
if (count == 100000)
{
//utility.print_bytes("100K curvesigs", signature, 64);
}
if (count == 1000000)
{
//utility.print_bytes("1M curvesigs", signature, 64);
}
if (count == 10000000)
{
//utility.print_bytes("10M curvesigs", signature, 64);
}
}
}
public void vxeddsa_fast_test()
{
byte[] signature_correct = new byte[]
{
0x23, 0xc6, 0xe5, 0x93, 0x3f, 0xcd, 0x56, 0x47,
0x7a, 0x86, 0xc9, 0x9b, 0x76, 0x2c, 0xb5, 0x24,
0xc3, 0xd6, 0x05, 0x55, 0x38, 0x83, 0x4d, 0x4f,
0x8d, 0xb8, 0xf0, 0x31, 0x07, 0xec, 0xeb, 0xa0,
0xa0, 0x01, 0x50, 0xb8, 0x4c, 0xbb, 0x8c, 0xcd,
0x23, 0xdc, 0x65, 0xfd, 0x0e, 0x81, 0xb2, 0x86,
0x06, 0xa5, 0x6b, 0x0c, 0x4f, 0x53, 0x6d, 0xc8,
0x8b, 0x8d, 0xc9, 0x04, 0x6e, 0x4a, 0xeb, 0x08,
0xce, 0x08, 0x71, 0xfc, 0xc7, 0x00, 0x09, 0xa4,
0xd6, 0xc0, 0xfd, 0x2d, 0x1a, 0xe5, 0xb6, 0xc0,
0x7c, 0xc7, 0x22, 0x3b, 0x69, 0x59, 0xa8, 0x26,
0x2b, 0x57, 0x78, 0xd5, 0x46, 0x0e, 0x0f, 0x05,
};
const int MSG_LEN = 200;
byte[] privkey = new byte[32];
byte[] pubkey = new byte[32];
byte[] signature = new byte[96];
byte[] msg = new byte[MSG_LEN];
byte[] random = new byte[64];
byte[] vrf_out = new byte[32];
byte[] vrf_outprev = new byte[32];
privkey[8] = 189; /* just so there's some bits set */
Sc_clamp.sc_clamp(privkey);
/* Signature vector test */
Keygen.curve25519_keygen(pubkey, privkey);
ISha512 sha512provider = new BouncyCastleDotNETSha512Provider();
vxeddsa.vxed25510_sign(sha512provider, signature, privkey, msg, MSG_LEN, random);
CollectionAssert.AreEqual(signature_correct, signature, "VXEdDSA sign");
Assert.AreEqual(0, vxeddsa.vxed25519_verify(sha512provider, vrf_out, signature, pubkey, msg, MSG_LEN), "VXEdDSA verify #1");
Array.Copy(vrf_out, 0, vrf_outprev, 0, 32);
signature[0] ^= 1;
Assert.AreNotEqual(0, vxeddsa.vxed25519_verify(sha512provider, vrf_out, signature, pubkey, msg, MSG_LEN), "VXEdDSA verify #2");
/* Test U */
byte[] sigprev = new byte[96];
Array.Copy(signature, 0, sigprev, 0, 96);
sigprev[0] ^= 1; /* undo prev disturbance */
random[0] ^= 1;
vxeddsa.vxed25510_sign(sha512provider, signature, privkey, msg, MSG_LEN, random);
Assert.AreEqual(0, vxeddsa.vxed25519_verify(sha512provider, vrf_out, signature, pubkey, msg, MSG_LEN), "VXEdDSA verify #3");
byte[] vrf0 = new byte[32];
Array.Copy(vrf_outprev, 0, vrf0, 0, 32);
byte[] vrfprev0 = new byte[32];
Array.Copy(vrf_out, 0, vrfprev0, 0, 32);
CollectionAssert.AreEqual(vrfprev0, vrf0, "VXEdDSA VRF value unchanged");
byte[] sig32 = new byte[64];
Array.Copy(signature, 32, sig32, 0, 64);
byte[] sigprev32 = new byte[64];
Array.Copy(sigprev, 32, sigprev32, 0, 64);
CollectionAssert.AreNotEqual(sigprev32, sig32, "VXEdDSA (h, s) changed");
}