/*
* SafeCritical - we're not exposing out anything that we want to prevent untrusted code from getting at
*/
public CapiHashAlgorithm(
string provider,
CapiNative.ProviderType providerType,
CapiNative.AlgorithmId algorithm)
{
Contract.Requires(!string.IsNullOrEmpty(provider));
Contract.Requires((CapiNative.AlgorithmClass)((uint)algorithm & (uint)CapiNative.AlgorithmClass.Hash) == CapiNative.AlgorithmClass.Hash);
m_algorithmId = algorithm;
m_cspHandle = CapiNative.AcquireCsp(null,
provider,
providerType,
CapiNative.CryptAcquireContextFlags.VerifyContext,
true);
m_hashHandle = Initialize();
}
internal static SafeCspHandle AcquireCsp(string keyContainer, string providerName, CapiNative.ProviderType providerType, CapiNative.CryptAcquireContextFlags flags)
{
if ((flags & CapiNative.CryptAcquireContextFlags.VerifyContext) == CapiNative.CryptAcquireContextFlags.VerifyContext && (flags & CapiNative.CryptAcquireContextFlags.MachineKeyset) == CapiNative.CryptAcquireContextFlags.MachineKeyset)
{
flags &= ~CapiNative.CryptAcquireContextFlags.MachineKeyset;
}
SafeCspHandle phProv = (SafeCspHandle)null;
if (!CapiNative.UnsafeNativeMethods.CryptAcquireContext(out phProv, keyContainer, providerName, providerType, flags))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
return(phProv);
}
public static extern bool CryptAcquireContext(out SafeCspHandle phProv, string pszContainer, string pszProvider, CapiNative.ProviderType dwProvType, CapiNative.CryptAcquireContextFlags dwFlags);
public CapiHashAlgorithm(string provider, CapiNative.ProviderType providerType, CapiNative.AlgorithmId algorithm)
{
this.m_algorithmId = algorithm;
this.m_cspHandle = CapiNative.AcquireCsp(null, provider, providerType, CapiNative.CryptAcquireContextFlags.None | CapiNative.CryptAcquireContextFlags.VerifyContext, true);
this.Initialize();
}
