public override bool VerifyHash(AsymmetricAlgorithm key, byte[] digest, byte[] signature)
{
var csp = key as RSACryptoServiceProvider;
SafeNCryptProviderHandle hProvider;
var errorCode = NativeMethods.NCryptOpenStorageProvider(out hProvider, "Microsoft Software Key Storage Provider", 0);
if (errorCode != NativeMethods.Success)
{
throw new CryptographicException(errorCode);
}
var blob = NativeMethods.NewNCryptPublicBlob(csp.ExportParameters(false));
SafeNCryptKeyHandle hKey;
errorCode = NativeMethods.NCryptImportKey(hProvider, IntPtr.Zero, "RSAPUBLICBLOB", null, out hKey, blob, blob.Length, 0);
if (errorCode != NativeMethods.Success)
{
throw new CryptographicException(errorCode);
}
var pkcs1Info = new NativeMethods.NCRYPT_PKCS1_PADDING_INFO {
pszAlgId = null
};
errorCode = NativeMethods.NCryptVerifySignature(hKey, ref pkcs1Info, digest, digest.Length, signature, signature.Length, NativeMethods.AsymmetricPaddingMode.Pkcs1);
if (errorCode != NativeMethods.Success && errorCode != NativeMethods.BadSignature && errorCode != NativeMethods.InvalidParameter)
{
throw new CryptographicException(errorCode);
}
return(errorCode == NativeMethods.Success);
}
public override byte[] SignHash(AsymmetricAlgorithm key, byte[] digest)
{
var csp = key as RSACryptoServiceProvider;
SafeNCryptProviderHandle hProvider;
var errorCode = NativeMethods.NCryptOpenStorageProvider(out hProvider, "Microsoft Software Key Storage Provider", 0);
if (errorCode != NativeMethods.Success)
{
throw new CryptographicException(errorCode);
}
var blob = NativeMethods.NewNCryptPrivateBlob(csp.ExportParameters(true));
SafeNCryptKeyHandle hKey;
errorCode = NativeMethods.NCryptImportKey(hProvider, IntPtr.Zero, "RSAPRIVATEBLOB", null, out hKey, blob, blob.Length, 0);
if (errorCode != NativeMethods.Success)
{
throw new CryptographicException(errorCode);
}
var pkcs1Info = new NativeMethods.NCRYPT_PKCS1_PADDING_INFO {
pszAlgId = null
};
int cbResult;
errorCode = NativeMethods.NCryptSignHash(hKey, ref pkcs1Info, digest, digest.Length, null, 0, out cbResult, NativeMethods.AsymmetricPaddingMode.Pkcs1);
if (errorCode != NativeMethods.Success)
{
throw new CryptographicException(errorCode);
}
var signature = new byte[cbResult];
errorCode = NativeMethods.NCryptSignHash(hKey, ref pkcs1Info, digest, digest.Length, signature, signature.Length, out cbResult, NativeMethods.AsymmetricPaddingMode.Pkcs1);
if (errorCode != NativeMethods.Success)
{
throw new CryptographicException(errorCode);
}
if (cbResult != signature.Length)
{
var temp = new byte[cbResult];
Array.Copy(signature, temp, cbResult);
signature = temp;
}
return(signature);
}
public override bool VerifyHash( AsymmetricAlgorithm key, byte[] digest, byte[] signature )
{
var csp = key as RSACryptoServiceProvider;
SafeNCryptProviderHandle hProvider;
var errorCode = NativeMethods.NCryptOpenStorageProvider( out hProvider, "Microsoft Software Key Storage Provider", 0 );
if ( errorCode != NativeMethods.Success )
throw new CryptographicException( errorCode );
var blob = NativeMethods.NewNCryptPublicBlob( csp.ExportParameters( false ) );
SafeNCryptKeyHandle hKey;
errorCode = NativeMethods.NCryptImportKey( hProvider, IntPtr.Zero, "RSAPUBLICBLOB", null, out hKey, blob, blob.Length, 0 );
if ( errorCode != NativeMethods.Success )
throw new CryptographicException( errorCode );
var pkcs1Info = new NativeMethods.NCRYPT_PKCS1_PADDING_INFO { pszAlgId = null };
errorCode = NativeMethods.NCryptVerifySignature( hKey, ref pkcs1Info, digest, digest.Length, signature, signature.Length, NativeMethods.AsymmetricPaddingMode.Pkcs1 );
if ( errorCode != NativeMethods.Success && errorCode != NativeMethods.BadSignature && errorCode != NativeMethods.InvalidParameter )
throw new CryptographicException( errorCode );
return ( errorCode == NativeMethods.Success );
}
public override byte[] SignHash( AsymmetricAlgorithm key, byte[] digest )
{
var csp = key as RSACryptoServiceProvider;
SafeNCryptProviderHandle hProvider;
var errorCode = NativeMethods.NCryptOpenStorageProvider( out hProvider, "Microsoft Software Key Storage Provider", 0 );
if ( errorCode != NativeMethods.Success )
throw new CryptographicException( errorCode );
var blob = NativeMethods.NewNCryptPrivateBlob( csp.ExportParameters( true ) );
SafeNCryptKeyHandle hKey;
errorCode = NativeMethods.NCryptImportKey( hProvider, IntPtr.Zero, "RSAPRIVATEBLOB", null, out hKey, blob, blob.Length, 0 );
if ( errorCode != NativeMethods.Success )
throw new CryptographicException( errorCode );
var pkcs1Info = new NativeMethods.NCRYPT_PKCS1_PADDING_INFO { pszAlgId = null };
int cbResult;
errorCode = NativeMethods.NCryptSignHash( hKey, ref pkcs1Info, digest, digest.Length, null, 0, out cbResult, NativeMethods.AsymmetricPaddingMode.Pkcs1 );
if ( errorCode != NativeMethods.Success )
throw new CryptographicException( errorCode );
var signature = new byte[cbResult];
errorCode = NativeMethods.NCryptSignHash( hKey, ref pkcs1Info, digest, digest.Length, signature, signature.Length, out cbResult, NativeMethods.AsymmetricPaddingMode.Pkcs1 );
if ( errorCode != NativeMethods.Success )
throw new CryptographicException( errorCode );
if ( cbResult != signature.Length )
{
var temp = new byte[cbResult];
Array.Copy( signature, temp, cbResult );
signature = temp;
}
return signature;
}
