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c-kzg-4844
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Add C# related files, rename dir, add impls

This commit is contained in:
Alexey Osipov 2022-10-11 00:46:29 +03:00
parent 620086ca4d
commit 9e98b13a2a
7 changed files with 265 additions and 97 deletions
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97
min-bindings/C#/tests.cs
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using System;
using System.Numerics;
using System.Text;
using System.Runtime.InteropServices;
class ckzg {
[DllImport("ckzg.dll", EntryPoint="bytes_to_bls_field_wrap")] // free result with free()
public static extern IntPtr bytes_to_bls_field(byte[] bytes);
[DllImport("ckzg.dll", EntryPoint="compute_powers_wrap")] // free result with free()
public static extern IntPtr compute_powers(IntPtr r, UInt64 n);
[DllImport("ckzg.dll", EntryPoint="vector_lincomb_wrap")] // free result with free_polynomial()
public static extern IntPtr vector_lincomb(byte[] vectors, IntPtr scalars, UInt64 num_vectors, UInt64 vector_len);
[DllImport("ckzg.dll", EntryPoint="g1_lincomb_wrap")] // free result with free()
public static extern IntPtr g1_lincomb(byte[] points, IntPtr scalars, UInt64 num_points);
[DllImport("ckzg.dll", EntryPoint="verify_kzg_proof_wrap")]
public static extern int verify_kzg_proof(IntPtr c, IntPtr x, IntPtr y, byte[] p, IntPtr ts);
[DllImport("ckzg.dll", EntryPoint="evaluate_polynomial_wrap")]
public static extern int evaluate_polynomial_in_evaluation_form(byte[] result, byte[] p, UInt64 n, byte[] z, IntPtr ts);
[DllImport("ckzg.dll", EntryPoint="load_trusted_setup_wrap")] // free result with free_trusted_setup()
public static extern IntPtr load_trusted_setup(string filename);
[DllImport("ckzg.dll", EntryPoint="free_trusted_setup_wrap")]
public static extern void free_trusted_setup(IntPtr ts);
[DllImport("ckzg.dll", EntryPoint="free_polynomial")]
public static extern void free_polynomial(IntPtr p);
[DllImport("ckzg.dll", EntryPoint="free")]
private static extern void free(IntPtr p);
}
class tests {
// Convert.FromHexString replacement (since mono does not seem to have new enough C# libs)
public static byte[] HexadecimalStringToByteArray(String hexadecimalString)
{
int length = hexadecimalString.Length;
byte[] byteArray = new byte[length / 2];
for (int i = 0; i < length; i += 2){
byteArray[i / 2] = Convert.ToByte(hexadecimalString.Substring(i, 2), 16);
}
return byteArray;
}
private static void Main(string[] args)
{
/* TODO: update for new interface
Console.WriteLine("Test 1: verify_kzg_proof");
IntPtr ts = ckzg.load_trusted_setup("../../src/trusted_setup.txt");
System.Diagnostics.Trace.Assert(ts != IntPtr.Zero, "Failed to load trusted setup.");
byte[] c = HexadecimalStringToByteArray("b91c022acf7bd3b63be69a4c19b781ea7a3d5df1cd66ceb7dd0f399610f0ee04695dace82e04bfb83af2b17d7319f87f");
byte[] x = HexadecimalStringToByteArray("0345f802a75a6c0d9cc5b8a1e71642b8fa80b0a78938edc6da1e591149578d1a");
byte[] y = HexadecimalStringToByteArray("3b17cab634c3795d311380f3bc93ce8e768efc0e2b9e79496cfc8f351594b472");
byte[] p = HexadecimalStringToByteArray("a5ddd6da04c47a9cd4628beb8d55ebd2e930a64dfa29f876ebf393cfd6574d48a3ce96ac5a2af4a4f9ec9caa47d304d3");
int result = ckzg.verify_kzg_proof(c, x, y, p, ts);
System.Diagnostics.Trace.Assert(result == 1, "Verification failed");
x[0] = 0x42;
result = ckzg.verify_kzg_proof(c, x, y, p, ts);
System.Diagnostics.Trace.Assert(result == 0, "Verification succeeded incorrectly");
ckzg.free_trusted_setup(ts);
*/
/* TODO: update for new interface
Console.WriteLine("Test 2: evaluate_polynomial_in_evaluation_form");
ts = ckzg.load_trusted_setup("../python/tiny_trusted_setup.txt");
System.Diagnostics.Trace.Assert(ts != IntPtr.Zero, "Failed to load trusted setup.");
p = HexadecimalStringToByteArray("10000000000000000d00000000000000000000000000000000000000000000000a000000000000000d00000000000000000000000000000000000000000000000b000000000001000d000376020003ecd0040376cecc518d00000000000000000c000000fffffeff0b5cfb8900a4ba6734d39e93390be8a5477d9d2953a7ed73");
x = HexadecimalStringToByteArray("0200000000000000000000000000000000000000000000000000000000000000");
UInt64 n = Convert.ToUInt64(p.Length) / 32;
result = ckzg.evaluate_polynomial_in_evaluation_form(y, p, n, x, ts);
System.Diagnostics.Trace.Assert(result == 0, "Evaluation failed");
System.Diagnostics.Trace.Assert(y == HexadecimalStringToByteArray("1c000000000000000d0000000000000000000000000000000000000000000000"),
"Evaluation produced incorrect value");
x[11] = 0x11;
result = ckzg.evaluate_polynomial_in_evaluation_form(y, p, n, x, ts);
System.Diagnostics.Trace.Assert(result == 0, "Second evaluation failed");
System.Diagnostics.Trace.Assert(y != HexadecimalStringToByteArray("1c000000000000000d0000000000000000000000000000000000000000000000"),
"Second evaluation produced incorrect value");
ckzg.free_trusted_setup(ts);
*/
Console.WriteLine("Tests passed");
}
}

3
min-bindings/csharp/.gitignore vendored Normal file
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bin/
obj/
.vs/

0
min-bindings/C#/Makefile → min-bindings/csharp/Makefile
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0
min-bindings/C#/ckzg.c → min-bindings/csharp/ckzg.c
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11
min-bindings/csharp/csharp.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0</TargetFramework>
<RootNamespace>csharp</RootNamespace>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
</Project>

25
min-bindings/csharp/csharp.sln Normal file
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Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.3.32922.545
MinimumVisualStudioVersion = 10.0.40219.1
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "csharp", "csharp.csproj", "{108ACE4B-334D-4D63-9897-9895DFF35FEE}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{108ACE4B-334D-4D63-9897-9895DFF35FEE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{108ACE4B-334D-4D63-9897-9895DFF35FEE}.Debug|Any CPU.Build.0 = Debug|Any CPU
{108ACE4B-334D-4D63-9897-9895DFF35FEE}.Release|Any CPU.ActiveCfg = Release|Any CPU
{108ACE4B-334D-4D63-9897-9895DFF35FEE}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {1FCEC58A-285C-4F22-8B55-68B1A312EE7E}
EndGlobalSection
EndGlobal

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min-bindings/csharp/tests.cs Normal file
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using System;
using System.Numerics;
using System.Text;
using System.Linq;
using System.Runtime.InteropServices;
class ckzg
{
[DllImport("ckzg.dll", EntryPoint = "bytes_to_bls_field_wrap")] // free result with free()
public static extern byte[] bytes_to_bls_field(byte[] bytes);
[DllImport("ckzg.dll", EntryPoint = "compute_powers_wrap")] // free result with free()
public static extern byte[] compute_powers(byte[] r, UInt64 n);
[DllImport("ckzg.dll", EntryPoint = "vector_lincomb_wrap")] // free result with free_polynomial()
public static extern byte[] vector_lincomb(byte[] vectors, byte[] scalars, UInt64 num_vectors, UInt64 vector_len);
[DllImport("ckzg.dll", EntryPoint = "g1_lincomb_wrap")] // free result with free()
public static extern byte[] g1_lincomb(byte[] points, byte[] scalars, UInt64 num_points);
[DllImport("ckzg.dll", EntryPoint = "verify_kzg_proof_wrap")]
public static extern bool verify_kzg_proof(byte[] c, byte[] x, byte[] y, byte[] p, IntPtr ts);
[DllImport("ckzg.dll", EntryPoint = "evaluate_polynomial_wrap")]
public static extern bool evaluate_polynomial_in_evaluation_form(byte[] result, byte[] p, UInt64 n, byte[] z, IntPtr ts);
[DllImport("ckzg.dll", EntryPoint = "load_trusted_setup_wrap")] // free result with free_trusted_setup()
public static extern IntPtr load_trusted_setup(string filename);
[DllImport("ckzg.dll", EntryPoint = "free_trusted_setup_wrap")]
public static extern void free_trusted_setup(IntPtr ts);
[DllImport("ckzg.dll", EntryPoint = "free_polynomial")]
public static extern void free_polynomial(IntPtr p);
[DllImport("ckzg.dll", EntryPoint = "free")]
private static extern void free(IntPtr p);
}
class tests
{
IntPtr ts = ckzg.load_trusted_setup("../../src/trusted_setup.txt");
byte[] ssz_of(params object[] anything)
{
return new byte[1]; //mock
}
byte[] hash(byte[] data)
{
return data; //mock
}
byte[] flatten(byte[][] data)
{
return data[0]; //mock
}
(byte[], byte[]) compute_aggregated_poly_and_commitment(byte[][] blobs, byte[][] kzg_commitments)
{
// Generate random linear combination challenges
var r = hash_to_bls_field(ssz_of("BlobsAndCommitments", blobs, kzg_commitments));
var r_powers = ckzg.compute_powers(r, (ulong)kzg_commitments.Length);
// Create aggregated polynomial in evaluation form
byte[] aggregated_poly = ckzg.vector_lincomb(flatten(blobs), r_powers, (ulong)blobs.Length, (ulong)4096);
// Compute commitment to aggregated polynomial
byte[] aggregated_poly_commitment = ckzg.g1_lincomb(flatten(kzg_commitments), r_powers, (ulong)kzg_commitments.Length);
return (aggregated_poly, aggregated_poly_commitment);
}
byte[] hash_to_bls_field(byte[] data)
{
return ckzg.bytes_to_bls_field(hash(data));
}
const byte BLOB_COMMITMENT_VERSION_KZG = 1;
byte[] kzg_to_versioned_hash(byte[] data_kzg)
{
var res = hash(data_kzg);
res[0] = BLOB_COMMITMENT_VERSION_KZG;
return res;
}
bool validate_blob_transaction_wrapper(
byte[][] versioned_hashes,
byte[][] commitments,
byte[][] blobs
)
{
if (versioned_hashes.Length != commitments.Length || commitments.Length != blobs.Length)
{
throw new ArgumentException("args");
}
var (aggregated_poly, aggregated_poly_commitment) = compute_aggregated_poly_and_commitment(
blobs,
commitments
);
// Generate challenge `x` and evaluate the aggregated polynomial at `x`
var x = hash_to_bls_field(
ssz_of("PolynomialAndCommitment", aggregated_poly, aggregated_poly_commitment)
);
// Evaluate aggregated polynomial at `x` (evaluation function checks for div-by-zero)
var y = ckzg.evaluate_polynomial_in_evaluation_form(aggregated_poly, x, "need to clarify", "need to clarify", ts);
// Verify aggregated proof
if (!ckzg.verify_kzg_proof(aggregated_poly_commitment, x, y, "need to clarify", ts))
{
return false;
}
// Now that all commitments have been verified, check that versioned_hashes matches the commitments
return versioned_hashes.Zip(commitments).All(x => Enumerable.SequenceEqual(x.First, kzg_to_versioned_hash(x.Second)));
}
readonly UInt256 BLS_MODULUS = UInt256.Parse("52435875175126190479447740508185965837690552500527637822603658699938581184513");
struct UInt256
{
public UInt256(params byte[] data)
{
}
public static bool operator >=(in UInt256 a, in UInt256 b) => true;
public static bool operator <=(in UInt256 a, in UInt256 b) => false;
internal static UInt256 Parse(string v)
{
return new UInt256();
}
}
bool point_evaluation_precompile(byte[] input)
{
var versioned_hash = input[..32];
// Evaluation point: next 32 bytes
var x = input[32..64];
if (new UInt256(x) >= BLS_MODULUS)
{
return false;
}
// Expected output: next 32 bytes
var y = input[64..96];
if (new UInt256(y) >= BLS_MODULUS)
{
return false;
}
// The remaining data will always be the proof, including in future versions
// input kzg point: next 48 bytes
var data_kzg = input[96..144];
if (!kzg_to_versioned_hash(data_kzg).SequenceEqual(versioned_hash))
{
return false;
}
// Quotient kzg: next 48 bytes
var quotient_kzg = input[144..192];
if (!ckzg.verify_kzg_proof(data_kzg, x, y, quotient_kzg, ts))
{
return false;
}
return true;
}
// Convert.FromHexString replacement (since mono does not seem to have new enough C# libs)
public static byte[] HexadecimalStringToByteArray(String hexadecimalString)
{
int length = hexadecimalString.Length;
byte[] byteArray = new byte[length / 2];
for (int i = 0; i < length; i += 2)
{
byteArray[i / 2] = Convert.ToByte(hexadecimalString.Substring(i, 2), 16);
}
return byteArray;
}
private static void Main(string[] args)
{
/* TODO: update for new interface
Console.WriteLine("Test 1: verify_kzg_proof");
IntPtr ts = ckzg.load_trusted_setup("../../src/trusted_setup.txt");
System.Diagnostics.Trace.Assert(ts != IntPtr.Zero, "Failed to load trusted setup.");
byte[] c = HexadecimalStringToByteArray("b91c022acf7bd3b63be69a4c19b781ea7a3d5df1cd66ceb7dd0f399610f0ee04695dace82e04bfb83af2b17d7319f87f");
byte[] x = HexadecimalStringToByteArray("0345f802a75a6c0d9cc5b8a1e71642b8fa80b0a78938edc6da1e591149578d1a");
byte[] y = HexadecimalStringToByteArray("3b17cab634c3795d311380f3bc93ce8e768efc0e2b9e79496cfc8f351594b472");
byte[] p = HexadecimalStringToByteArray("a5ddd6da04c47a9cd4628beb8d55ebd2e930a64dfa29f876ebf393cfd6574d48a3ce96ac5a2af4a4f9ec9caa47d304d3");
int result = ckzg.verify_kzg_proof(c, x, y, p, ts);
System.Diagnostics.Trace.Assert(result == 1, "Verification failed");
x[0] = 0x42;
result = ckzg.verify_kzg_proof(c, x, y, p, ts);
System.Diagnostics.Trace.Assert(result == 0, "Verification succeeded incorrectly");
ckzg.free_trusted_setup(ts);
*/
/* TODO: update for new interface
Console.WriteLine("Test 2: evaluate_polynomial_in_evaluation_form");
ts = ckzg.load_trusted_setup("../python/tiny_trusted_setup.txt");
System.Diagnostics.Trace.Assert(ts != IntPtr.Zero, "Failed to load trusted setup.");
p = HexadecimalStringToByteArray("10000000000000000d00000000000000000000000000000000000000000000000a000000000000000d00000000000000000000000000000000000000000000000b000000000001000d000376020003ecd0040376cecc518d00000000000000000c000000fffffeff0b5cfb8900a4ba6734d39e93390be8a5477d9d2953a7ed73");
x = HexadecimalStringToByteArray("0200000000000000000000000000000000000000000000000000000000000000");
UInt64 n = Convert.ToUInt64(p.Length) / 32;
result = ckzg.evaluate_polynomial_in_evaluation_form(y, p, n, x, ts);
System.Diagnostics.Trace.Assert(result == 0, "Evaluation failed");
System.Diagnostics.Trace.Assert(y == HexadecimalStringToByteArray("1c000000000000000d0000000000000000000000000000000000000000000000"),
"Evaluation produced incorrect value");
x[11] = 0x11;
result = ckzg.evaluate_polynomial_in_evaluation_form(y, p, n, x, ts);
System.Diagnostics.Trace.Assert(result == 0, "Second evaluation failed");
System.Diagnostics.Trace.Assert(y != HexadecimalStringToByteArray("1c000000000000000d0000000000000000000000000000000000000000000000"),
"Second evaluation produced incorrect value");
ckzg.free_trusted_setup(ts);
*/
Console.WriteLine("Tests passed");
}
}