public static unsafe void HashWithDomain(out Span <byte> signatureBytes, out Span <byte> blsSignatureBytes, Span <byte> hashBytes, Span <byte> domainBytes)
{
blsSignatureBytes = new byte[BlsSignatureLength];
signatureBytes = new byte[SignatureLength];
Span <byte> hashWithDomain = stackalloc byte[HashLength + DomainLength];
hashBytes.CopyTo(hashWithDomain.Slice(0, 32));
domainBytes.CopyTo(hashWithDomain.Slice(32, 8));
fixed(byte *signatureBytesRef = signatureBytes)
fixed(byte *blsSignatureBytesRef = blsSignatureBytes)
fixed(byte *hashWithDomainRef = hashWithDomain)
{
switch (Platform)
{
case OsPlatform.Windows:
Win64Lib.blsHashWithDomainToFp2(signatureBytesRef, hashWithDomainRef);
break;
case OsPlatform.Mac:
MacLib.blsHashWithDomainToFp2(signatureBytesRef, hashWithDomainRef);
break;
case OsPlatform.Linux:
PosixLib.blsHashWithDomainToFp2(signatureBytesRef, hashWithDomainRef);
break;
default:
throw new ArgumentOutOfRangeException(Platform.ToString());
}
DeserializeSignature(blsSignatureBytesRef, signatureBytesRef);
}
}
public static unsafe void AddSignature(Span <byte> a, Span <byte> b)
{
Span <byte> blsA = stackalloc byte[BlsSignatureLength];
Span <byte> blsB = stackalloc byte[BlsSignatureLength];
fixed(byte *aRef = a)
fixed(byte *bRef = b)
fixed(byte *blsARef = blsA)
fixed(byte *blsBRef = blsB)
{
DeserializeSignature(blsARef, aRef);
DeserializeSignature(blsBRef, bRef);
switch (Platform)
{
case OsPlatform.Windows:
Win64Lib.blsSignatureAdd(blsARef, blsBRef);
break;
case OsPlatform.Mac:
MacLib.blsSignatureAdd(blsARef, blsBRef);
break;
case OsPlatform.Linux:
PosixLib.blsSignatureAdd(blsARef, blsBRef);
break;
default:
throw new ArgumentOutOfRangeException(Platform.ToString());
}
SerializeSignature(aRef, blsARef);
}
}
public static unsafe void GetPublicKey(Span <byte> privateKeyBytes, out Span <byte> publicKeyBytes)
{
Span <byte> blsPrivateKey = stackalloc byte[BlsPrivateKeyLength];
Span <byte> blsPublicKey = stackalloc byte[BlsPublicKeyLength];
publicKeyBytes = new byte[PublicKeyLength];
fixed(byte *privateKeyBytesRef = privateKeyBytes)
fixed(byte *publicKeyBytesRef = publicKeyBytes)
fixed(byte *blsPrivateKeyRef = blsPrivateKey)
fixed(byte *blsPublicKeyRef = blsPublicKey)
{
DeserializePrivateKey(blsPrivateKeyRef, privateKeyBytesRef);
switch (Platform)
{
case OsPlatform.Windows:
Win64Lib.blsGetPublicKey(blsPublicKeyRef, blsPrivateKeyRef);
break;
case OsPlatform.Mac:
MacLib.blsGetPublicKey(blsPublicKeyRef, blsPrivateKeyRef);
break;
case OsPlatform.Linux:
PosixLib.blsGetPublicKey(blsPublicKeyRef, blsPrivateKeyRef);
break;
default:
throw new ArgumentOutOfRangeException(Platform.ToString());
}
SerializePublicKey(publicKeyBytesRef, blsPublicKeyRef);
}
}
public static byte[] GetPublicKey(byte[] privateKey, bool compressed)
{
byte[] publicKey = new byte[64];
if (Platform == OsPlatform.Windows
? !Win64Lib.secp256k1_ec_pubkey_create(Context, publicKey, privateKey)
: !(Platform == OsPlatform.Linux
? PosixLib.secp256k1_ec_pubkey_create(Context, publicKey, privateKey)
: MacLib.secp256k1_ec_pubkey_create(Context, publicKey, privateKey)))
{
return(null);
}
byte[] serializedPublicKey = new byte[compressed ? 33 : 65];
uint outputSize = (uint)serializedPublicKey.Length;
uint flags = compressed ? Secp256K1EcCompressed : Secp256K1EcUncompressed;
if (Platform == OsPlatform.Windows
? !Win64Lib.secp256k1_ec_pubkey_serialize(Context, serializedPublicKey, ref outputSize, publicKey, flags)
: !(Platform == OsPlatform.Linux
? PosixLib.secp256k1_ec_pubkey_serialize(Context, serializedPublicKey, ref outputSize, publicKey, flags)
: MacLib.secp256k1_ec_pubkey_serialize(Context, serializedPublicKey, ref outputSize, publicKey, flags)))
{
return(null);
}
return(serializedPublicKey);
}
/// <summary>
/// Serialize a pubkey object into a serialized byte sequence.
/// </summary>
/// <param name="serializedPublicKeyOutput">65-byte (if compressed==0) or 33-byte (if compressed==1) output to place the serialized key in.</param>
/// <param name="publicKey">The secp256k1_pubkey initialized public key.</param>
/// <param name="flags">SECP256K1_EC_COMPRESSED if serialization should be in compressed format, otherwise SECP256K1_EC_UNCOMPRESSED.</param>
public static unsafe bool PublicKeySerialize(Span <byte> serializedPublicKeyOutput, Span <byte> publicKey, uint flags = Secp256K1EcUncompressed)
{
bool compressed = (flags & Secp256K1EcCompressed) == Secp256K1EcCompressed;
int serializedPubKeyLength = compressed ? 33 : 65;
if (serializedPublicKeyOutput.Length < serializedPubKeyLength)
{
string compressedStr = compressed ? "compressed" : "uncompressed";
throw new ArgumentException($"{nameof(serializedPublicKeyOutput)} ({compressedStr}) must be {serializedPubKeyLength} bytes");
}
if (publicKey.Length < 64)
{
throw new ArgumentException($"{nameof(publicKey)} must be {64} bytes");
}
uint newLength = (uint)serializedPubKeyLength;
fixed(byte *serializedPtr = &MemoryMarshal.GetReference(serializedPublicKeyOutput),
pubKeyPtr = &MemoryMarshal.GetReference(publicKey))
{
var result = (Platform == OsPlatform.Windows
? Win64Lib.secp256k1_ec_pubkey_serialize(Context, serializedPtr, ref newLength, pubKeyPtr, (uint)flags)
: Platform == OsPlatform.Linux
? PosixLib.secp256k1_ec_pubkey_serialize(Context, serializedPtr, ref newLength, pubKeyPtr, (uint)flags)
: MacLib.secp256k1_ec_pubkey_serialize(Context, serializedPtr, ref newLength, pubKeyPtr, (uint)flags));
return(result == 1 && newLength == serializedPubKeyLength);
}
}
public static unsafe bool Ecdh(byte[] agreement, byte[] publicKey, byte[] privateKey)
{
int outputLength = agreement.Length;
secp256k1_ecdh_hash_function hashFunctionPtr = (void *output, void *x, void *y, IntPtr d) =>
{
var outputSpan = new Span <byte>(output, outputLength);
var xSpan = new Span <byte>(x, 32);
if (xSpan.Length < 32)
{
return(0);
}
xSpan.CopyTo(outputSpan);
return(1);
};
GCHandle gch = GCHandle.Alloc(hashFunctionPtr);
try
{
IntPtr fp = Marshal.GetFunctionPointerForDelegate(hashFunctionPtr);
{
return(Platform == OsPlatform.Windows
? Win64Lib.secp256k1_ecdh(Context, agreement, publicKey, privateKey, fp, IntPtr.Zero)
: Platform == OsPlatform.Linux
? PosixLib.secp256k1_ecdh(Context, agreement, publicKey, privateKey, fp, IntPtr.Zero)
: MacLib.secp256k1_ecdh(Context, agreement, publicKey, privateKey, fp, IntPtr.Zero));
}
}
finally
{
gch.Free();
}
}
public static byte[] SignCompact(byte[] messageHash, byte[] privateKey, out int recoveryId)
{
byte[] recoverableSignature = new byte[65];
recoveryId = 0;
if (Platform == OsPlatform.Windows
? !Win64Lib.secp256k1_ecdsa_sign_recoverable(Context, recoverableSignature, messageHash, privateKey, IntPtr.Zero, IntPtr.Zero)
: !(Platform == OsPlatform.Linux
? PosixLib.secp256k1_ecdsa_sign_recoverable(Context, recoverableSignature, messageHash, privateKey, IntPtr.Zero, IntPtr.Zero)
: MacLib.secp256k1_ecdsa_sign_recoverable(Context, recoverableSignature, messageHash, privateKey, IntPtr.Zero, IntPtr.Zero)))
{
return(null);
}
byte[] compactSignature = new byte[64];
if (Platform == OsPlatform.Windows
? !Win64Lib.secp256k1_ecdsa_recoverable_signature_serialize_compact(Context, compactSignature, out recoveryId, recoverableSignature)
: !(Platform == OsPlatform.Linux
? PosixLib.secp256k1_ecdsa_recoverable_signature_serialize_compact(Context, compactSignature, out recoveryId, recoverableSignature)
: MacLib.secp256k1_ecdsa_recoverable_signature_serialize_compact(Context, compactSignature, out recoveryId, recoverableSignature)))
{
return(null);
}
return(compactSignature);
}
static BlsProxy()
{
Platform = GetPlatform();
int initResult = Platform switch
{
OsPlatform.Windows => Win64Lib.blsInit(MclBls12_381CurveId, MclBnCompileTimeVar),
OsPlatform.Linux => PosixLib.blsInit(MclBls12_381CurveId, MclBnCompileTimeVar),
OsPlatform.Mac => MacLib.blsInit(MclBls12_381CurveId, MclBnCompileTimeVar),
_ => throw new ArgumentOutOfRangeException(Platform.ToString())
};
if (initResult != 0)
{
throw new CryptographicException($"Unable to load the BLS lib: {initResult}");
}
switch (Platform)
{
case OsPlatform.Windows:
Win64Lib.blsSetETHserialization(1);
break;
case OsPlatform.Mac:
MacLib.blsSetETHserialization(1);
break;
case OsPlatform.Linux:
PosixLib.blsSetETHserialization(1);
break;
default:
throw new ArgumentOutOfRangeException(Platform.ToString());
}
}
private static IntPtr CreateContext()
{
return(Platform switch
{
OsPlatform.Windows => Win64Lib.secp256k1_context_create(Secp256K1ContextSign | Secp256K1ContextVerify),
OsPlatform.Linux => PosixLib.secp256k1_context_create(Secp256K1ContextSign | Secp256K1ContextVerify),
OsPlatform.Mac => MacLib.secp256k1_context_create(Secp256K1ContextSign | Secp256K1ContextVerify),
_ => throw new InvalidOperationException("Unsupported platform.")
});
private static unsafe void SerializePublicKey(byte *serializedRef, byte *deserializedRef)
{
int bytesWritten = Platform switch
{
OsPlatform.Windows => Win64Lib.blsPublicKeySerialize(serializedRef, PublicKeyLength, deserializedRef),
OsPlatform.Linux => PosixLib.blsPublicKeySerialize(serializedRef, PublicKeyLength, deserializedRef),
OsPlatform.Mac => MacLib.blsPublicKeySerialize(serializedRef, PublicKeyLength, deserializedRef),
_ => throw new ArgumentOutOfRangeException(Platform.ToString())
};
if (bytesWritten != PublicKeyLength)
{
throw new CryptographicException($"Bytes written was {bytesWritten} when serializing public key");
}
}
private static unsafe void DeserializePrivateKey(byte *deserializedRef, byte *serializedRef)
{
int bytesRead = Platform switch
{
OsPlatform.Windows => Win64Lib.blsSecretKeyDeserialize(deserializedRef, serializedRef, PrivateKeyLength),
OsPlatform.Linux => PosixLib.blsSecretKeyDeserialize(deserializedRef, serializedRef, PrivateKeyLength),
OsPlatform.Mac => MacLib.blsSecretKeyDeserialize(deserializedRef, serializedRef, PrivateKeyLength),
_ => throw new ArgumentOutOfRangeException(Platform.ToString())
};
if (bytesRead != PrivateKeyLength)
{
throw new CryptographicException($"Bytes read was {bytesRead} instead of {PrivateKeyLength} when deserializing private key");
}
}
private static unsafe void SerializeSignature(byte *serializedRef, byte *deserializedRef)
{
int bytesWritten = Platform switch
{
OsPlatform.Windows => Win64Lib.blsSignatureSerialize(serializedRef, SignatureLength, deserializedRef),
OsPlatform.Linux => PosixLib.blsSignatureSerialize(serializedRef, SignatureLength, deserializedRef),
OsPlatform.Mac => MacLib.blsSignatureSerialize(serializedRef, SignatureLength, deserializedRef),
_ => throw new ArgumentOutOfRangeException(Platform.ToString())
};
if (bytesWritten != SignatureLength)
{
throw new CryptographicException($"Bytes written was {bytesWritten} instead of {SignatureLength} when deserializing private key");
}
}
public static bool VerifyPrivateKey(byte[] privateKey)
{
switch (Platform)
{
case OsPlatform.Windows:
return(Win64Lib.secp256k1_ec_seckey_verify(Context, privateKey));
case OsPlatform.Linux:
return(PosixLib.secp256k1_ec_seckey_verify(Context, privateKey));
case OsPlatform.Mac:
return(MacLib.secp256k1_ec_seckey_verify(Context, privateKey));
}
throw new InvalidOperationException("Unsupported platform.");
}
private static IntPtr CreateContext()
{
switch (Platform)
{
case OsPlatform.Windows:
return(Win64Lib.secp256k1_context_create(Secp256K1ContextSign | Secp256K1ContextVerify));
case OsPlatform.Linux:
return(PosixLib.secp256k1_context_create(Secp256K1ContextSign | Secp256K1ContextVerify));
case OsPlatform.Mac:
return(MacLib.secp256k1_context_create(Secp256K1ContextSign | Secp256K1ContextVerify));
}
throw new InvalidOperationException("Unsupported platform.");
}
public static string GetSolcVersion()
{
switch (Platform)
{
case OsPlatform.Windows:
return(Win64Lib.version());
case OsPlatform.Linux:
return(PosixLib.version());
case OsPlatform.Mac:
return(MacLib.version());
}
throw new InvalidOperationException("Unsupported platform.");
}
public static string Compile(string contract, string evmVersion, bool optimize, uint?runs)
{
string input = new CompilerInput(contract, evmVersion, optimize, runs).Value();
switch (Platform)
{
case OsPlatform.Windows:
return(Win64Lib.compileStandard(input, null));
case OsPlatform.Linux:
return(PosixLib.compileStandard(input, null));
case OsPlatform.Mac:
return(MacLib.compileStandard(input, null));
}
throw new InvalidOperationException("Unsupported platform.");
}
public static byte[] RecoverKeyFromCompact(byte[] messageHash, byte[] compactSignature, int recoveryId, bool compressed)
{
byte[] recoverableSignature = new byte[65];
if (Platform == OsPlatform.Windows
? !Win64Lib.secp256k1_ecdsa_recoverable_signature_parse_compact(Context, recoverableSignature, compactSignature, recoveryId)
: !(Platform == OsPlatform.Linux
? PosixLib.secp256k1_ecdsa_recoverable_signature_parse_compact(Context, recoverableSignature, compactSignature, recoveryId)
: MacLib.secp256k1_ecdsa_recoverable_signature_parse_compact(Context, recoverableSignature, compactSignature, recoveryId)))
{
return(null);
}
byte[] publicKey = new byte[64];
if (Platform == OsPlatform.Windows
? !Win64Lib.secp256k1_ecdsa_recover(Context, publicKey, recoverableSignature, messageHash)
: !(Platform == OsPlatform.Linux
? PosixLib.secp256k1_ecdsa_recover(Context, publicKey, recoverableSignature, messageHash)
: MacLib.secp256k1_ecdsa_recover(Context, publicKey, recoverableSignature, messageHash)))
{
return(null);
}
uint flags = compressed ? Secp256K1EcCompressed : Secp256K1EcUncompressed;
byte[] serializedPublicKey = new byte[compressed ? 33 : 65];
uint outputSize = (uint)serializedPublicKey.Length;
if (Platform == OsPlatform.Windows
? !Win64Lib.secp256k1_ec_pubkey_serialize(Context, serializedPublicKey, ref outputSize, publicKey, flags)
: !(Platform == OsPlatform.Linux
? PosixLib.secp256k1_ec_pubkey_serialize(Context, serializedPublicKey, ref outputSize, publicKey, flags)
: MacLib.secp256k1_ec_pubkey_serialize(Context, serializedPublicKey, ref outputSize, publicKey, flags)))
{
return(null);
}
return(serializedPublicKey);
}
/// <summary>
/// Parse a variable-length public key into the pubkey object.
/// This function supports parsing compressed (33 bytes, header byte 0x02 or
/// 0x03), uncompressed(65 bytes, header byte 0x04), or hybrid(65 bytes, header
/// byte 0x06 or 0x07) format public keys.
/// </summary>
/// <param name="publicKeyOutput">(Output) pointer to a pubkey object. If 1 is returned, it is set to a parsed version of input. If not, its value is undefined.</param>
/// <param name="serializedPublicKey">Serialized public key.</param>
/// <returns>True if the public key was fully valid, false if the public key could not be parsed or is invalid.</returns>
public static unsafe bool PublicKeyParse(Span <byte> publicKeyOutput, Span <byte> serializedPublicKey)
{
var inputLen = serializedPublicKey.Length;
if (inputLen != 33 && inputLen != 65)
{
throw new ArgumentException($"{nameof(serializedPublicKey)} must be 33 or 65 bytes");
}
if (publicKeyOutput.Length < 64)
{
throw new ArgumentException($"{nameof(publicKeyOutput)} must be {64} bytes");
}
fixed(byte *pubKeyPtr = &MemoryMarshal.GetReference(publicKeyOutput),
serializedPtr = &MemoryMarshal.GetReference(serializedPublicKey))
{
return((Platform == OsPlatform.Windows
? Win64Lib.secp256k1_ec_pubkey_parse(Context, pubKeyPtr, serializedPtr, (uint)inputLen)
: Platform == OsPlatform.Linux
? PosixLib.secp256k1_ec_pubkey_parse(Context, pubKeyPtr, serializedPtr, (uint)inputLen)
: MacLib.secp256k1_ec_pubkey_parse(Context, pubKeyPtr, serializedPtr, (uint)inputLen)) == 1);
}
}
