internal static bool VerifySignature(this ISignable signable)
{
UInt160[] hashes;
try
{
hashes = signable.GetScriptHashesForVerifying();
}
catch (InvalidOperationException)
{
return(false);
}
if (hashes.Length != signable.Scripts.Length)
{
return(false);
}
for (int i = 0; i < hashes.Length; i++)
{
if (hashes[i] != signable.Scripts[i].RedeemScript.ToScriptHash())
{
return(false);
}
ScriptEngine engine = new ScriptEngine(signable.Scripts[i], signable.GetHashForSigning());
if (!engine.Execute())
{
return(false);
}
}
return(true);
}
/// <summary>
/// 根据传入的公私钥，对可签名的对象进行签名
/// </summary>
/// <param name="signable">要签名的数据</param>
/// <param name="prikey">私钥</param>
/// <param name="pubkey">公钥</param>
/// <returns>返回签名后的结果</returns>
internal static byte[] Sign(this ISignable signable, byte[] prikey, byte[] pubkey)
{
const int ECDSA_PRIVATE_P256_MAGIC = 0x32534345;
prikey = BitConverter.GetBytes(ECDSA_PRIVATE_P256_MAGIC).Concat(BitConverter.GetBytes(32)).Concat(pubkey).Concat(prikey).ToArray();
using (CngKey key = CngKey.Import(prikey, CngKeyBlobFormat.EccPrivateBlob))
using (ECDsaCng ecdsa = new ECDsaCng(key))
{
return(ecdsa.SignHash(signable.GetHashForSigning()));
}
}
/// <summary>
/// 根据传入的公钥与签名，对可签名对象的签名进行验证
/// </summary>
/// <param name="signable">要验证的数据</param>
/// <param name="pubkey">公钥</param>
/// <param name="signature">签名</param>
/// <returns>返回验证结果</returns>
public static bool VerifySignature(this ISignable signable, ECPoint pubkey, byte[] signature)
{
const int ECDSA_PUBLIC_P256_MAGIC = 0x31534345;
byte[] bytes = BitConverter.GetBytes(ECDSA_PUBLIC_P256_MAGIC).Concat(BitConverter.GetBytes(32)).Concat(pubkey.EncodePoint(false).Skip(1)).ToArray();
using (CngKey key = CngKey.Import(bytes, CngKeyBlobFormat.EccPublicBlob))
using (ECDsaCng ecdsa = new ECDsaCng(key))
{
return(ecdsa.VerifyHash(signable.GetHashForSigning(), signature));
}
}
public byte[] Sign(ISignable signable)
{
byte[] signature;
ProtectedMemory.Unprotect(key_exported, MemoryProtectionScope.SameProcess);
using (CngKey key = CngKey.Import(key_exported, CngKeyBlobFormat.EccPrivateBlob))
using (ECDsaCng ecdsa = new ECDsaCng(key))
{
signature = ecdsa.SignHash(signable.GetHashForSigning());
}
ProtectedMemory.Protect(key_exported, MemoryProtectionScope.SameProcess);
return(signature);
}
/// <summary>
/// 根据传入的公私钥，对可签名的对象进行签名
/// </summary>
/// <param name="signable">要签名的数据</param>
/// <param name="prikey">私钥</param>
/// <param name="pubkey">公钥</param>
/// <returns>返回签名后的结果</returns>
internal static byte[] Sign(this ISignable signable, byte[] prikey, byte[] pubkey)
{
#if NET461
const int ECDSA_PRIVATE_P256_MAGIC = 0x32534345;
prikey = BitConverter.GetBytes(ECDSA_PRIVATE_P256_MAGIC).Concat(BitConverter.GetBytes(32)).Concat(pubkey).Concat(prikey).ToArray();
using (CngKey key = CngKey.Import(prikey, CngKeyBlobFormat.EccPrivateBlob))
using (ECDsaCng ecdsa = new ECDsaCng(key))
#else
using (var ecdsa = ECDsa.Create(new ECParameters
{
Curve = ECCurve.NamedCurves.nistP256,
D = prikey,
Q = new ECPoint
{
X = pubkey.Take(32).ToArray(),
Y = pubkey.Skip(32).ToArray()
}
}))
#endif
{
return(ecdsa.SignHash(signable.GetHashForSigning()));
}
}
/// <summary>
/// 根据传入的公钥与签名，对可签名对象的签名进行验证
/// </summary>
/// <param name="signable">要验证的数据</param>
/// <param name="pubkey">公钥</param>
/// <param name="signature">签名</param>
/// <returns>返回验证结果</returns>
public static bool VerifySignature(this ISignable signable, Cryptography.ECC.ECPoint pubkey, byte[] signature)
{
byte[] pubk = pubkey.EncodePoint(false).Skip(1).ToArray();
#if NET461
const int ECDSA_PUBLIC_P256_MAGIC = 0x31534345;
pubk = BitConverter.GetBytes(ECDSA_PUBLIC_P256_MAGIC).Concat(BitConverter.GetBytes(32)).Concat(pubk).ToArray();
using (CngKey key = CngKey.Import(pubk, CngKeyBlobFormat.EccPublicBlob))
using (ECDsaCng ecdsa = new ECDsaCng(key))
#else
using (var ecdsa = ECDsa.Create(new ECParameters
{
Curve = ECCurve.NamedCurves.nistP256,
Q = new ECPoint
{
X = pubk.Take(32).ToArray(),
Y = pubk.Skip(32).ToArray()
}
}))
#endif
{
return(ecdsa.VerifyHash(signable.GetHashForSigning(), signature));
}
}
public byte[] Sign(ISignable signable)
{
byte[] signature;
ProtectedMemory.Unprotect(key_exported, MemoryProtectionScope.SameProcess);
using (CngKey key = CngKey.Import(key_exported, CngKeyBlobFormat.EccPrivateBlob))
using (ECDsaCng ecdsa = new ECDsaCng(key))
{
signature = ecdsa.SignHash(signable.GetHashForSigning());
}
ProtectedMemory.Protect(key_exported, MemoryProtectionScope.SameProcess);
return signature;
}
