/// <summary>
/// Computes the signature for the specified hash value by encrypting it with the private key.
/// </summary>
/// <param name="rgbHash">The hash value of the data to be signed.</param>
/// <param name="str">The name of the hash algorithm used to create the hash value of the data.</param>
/// <returns>The DSA signature for the specified hash value.</returns>
public byte[] SignHash(byte[] rgbHash, string str)
{
if (rgbHash == null)
{
throw new ArgumentNullException(nameof(rgbHash));
}
if (PublicOnly)
{
throw new CryptographicException(SR.Cryptography_CSP_NoPrivateKey);
}
int calgHash = CapiHelper.NameOrOidToHashAlgId(str, OidGroup.HashAlgorithm);
if (rgbHash.Length != _sha1.HashSize / 8)
{
throw new CryptographicException(string.Format(SR.Cryptography_InvalidHashSize, "SHA1", _sha1.HashSize / 8));
}
return(CapiHelper.SignValue(
SafeProvHandle,
SafeKeyHandle,
_parameters.KeyNumber,
CapiHelper.CALG_DSS_SIGN,
calgHash,
rgbHash));
}
public override byte[] SignHash(byte[] rgbHash)
{
if (rgbHash == null)
{
throw new ArgumentNullException(nameof(rgbHash));
}
if (PublicOnly)
{
throw new CryptographicException(SR.Cryptography_CSP_NoPrivateKey);
}
if (rgbHash.Length != (GostConstants.GOST3411_2012_256_SIZE / 8))
{
throw new CryptographicException(
string.Format(
SR.Cryptography_InvalidHashSize,
"GOST3411_2012_256", GostConstants.GOST3411_2012_256_SIZE / 8));
}
GetKeyPair();
return(CapiHelper.SignValue(
SafeProvHandle,
SafeKeyHandle,
_keySpec, //2
CapiHelper.CALG_RSA_SIGN, //переворачиваем подпись, раньше (Sharpei) переворачивали только в форматтерах
GostConstants.CALG_GR3411_2012_256,
rgbHash));
}
/// <summary>
/// Computes the hash value of a subset of the specified byte array using the
/// specified hash algorithm, and signs the resulting hash value.
/// </summary>
/// <param name="rgbHash">The input data for which to compute the hash</param>
/// <param name="calgHash">The hash algorithm to use to create the hash value. </param>
/// <returns>The RSA signature for the specified data.</returns>
private byte[] SignHash(byte[] rgbHash, int calgHash)
{
Debug.Assert(rgbHash != null);
return(CapiHelper.SignValue(
SafeProvHandle,
SafeKeyHandle,
_parameters.KeyNumber,
CapiHelper.CALG_RSA_SIGN,
calgHash,
rgbHash));
}
