internal string CreateUserHash(HttpContext context)
{
ReadOnlySpan <byte> saltSpan = m_saltProvider.GetSalt();
using IMemoryOwner <byte> uidMemoryOwner = MemoryPool <byte> .Shared.Rent(m_maxIdentitySize + saltSpan.Length);
Span <byte> uidSpan = uidMemoryOwner.Memory.Span;
uidSpan.Fill(0);
int identityBytesWritten = -1;
foreach (IUserIdentityProvider provider in m_userIdentityProviders)
{
if (provider.TryWriteBytes(context, uidSpan.Slice(0, provider.MaxBytesInIdentity), out identityBytesWritten))
{
break;
}
}
if (identityBytesWritten <= 0)
{
return(string.Empty);
}
saltSpan.CopyTo(uidSpan.Slice(identityBytesWritten));
using IMemoryOwner <byte> hashMemoryOwner = MemoryPool <byte> .Shared.Rent(HashSize);
Span <byte> hashSpan = hashMemoryOwner.Memory.Span;
#if NETCOREAPP3_1
using HashAlgorithm hashAlgorithm = new SHA256Managed(); // need to have new instance each time since its not thread-safe
if (!hashAlgorithm.TryComputeHash(uidSpan, hashSpan, out _))
{
return(string.Empty);
}
return(BitConverter.ToString(hashSpan.ToArray()).Replace("-", ""));
#else
SHA256.HashData(uidSpan, hashSpan);
return(Convert.ToHexString(hashSpan));
#endif
}
internal string CreateUserHash(HttpContext context)
{
ReadOnlySpan <byte> saltSpan = m_saltProvider.GetSalt();
using IMemoryOwner <byte> uidMemoryOwner = MemoryPool <byte> .Shared.Rent(m_maxIdentitySize + saltSpan.Length);
Span <byte> uidSpan = uidMemoryOwner.Memory.Span;
int identityBytesWritten = -1;
Span <byte> identitySpan = uidSpan.Slice(0, m_maxIdentitySize);
foreach (IUserIdentityProvider provider in m_userIdentityProviders)
{
if (provider.TryWriteBytes(context, identitySpan, out identityBytesWritten))
{
break;
}
}
if (identityBytesWritten <= 0)
{
return(string.Empty);
}
saltSpan.CopyTo(uidSpan.Slice(identityBytesWritten));
using IMemoryOwner <byte> hashMemoryOwner = MemoryPool <byte> .Shared.Rent(HashSize);
Span <byte> hashSpan = hashMemoryOwner.Memory.Span;
if (!m_hashAlgorithm.TryComputeHash(uidSpan, hashSpan, out int hashBytesWritten))
{
return(string.Empty);
}
#if NETCOREAPP3_1
return(BitConverter.ToString(hashSpan.ToArray()).Replace("-", ""));
#else
return(Convert.ToHexString(hashSpan));
#endif
}
