public static unsafe void HashData(SafeHashHandleImpl hashHandle, byte[] data, int dataOffset, int dataLength) { if (data == null) { throw ExceptionUtility.ArgumentNull(nameof(data)); } if (dataOffset < 0) { throw ExceptionUtility.ArgumentOutOfRange(nameof(dataOffset)); } if (dataLength < 0) { throw ExceptionUtility.ArgumentOutOfRange(nameof(dataLength)); } if (data.Length < dataOffset + dataLength) { throw ExceptionUtility.ArgumentOutOfRange(nameof(dataLength)); } if (dataLength > 0) { fixed(byte *dataRef = data) { var dataOffsetRef = dataRef + dataOffset; if (!CryptoApi.CryptHashData(hashHandle, dataOffsetRef, (uint)dataLength, 0)) { throw CreateWin32Error(); } } } }
public static SafeKeyHandleImpl ImportBulkSessionKey(ProviderType providerType, SafeProvHandleImpl providerHandle, byte[] bulkSessionKey, RNGCryptoServiceProvider randomNumberGenerator) { if (bulkSessionKey == null) { throw ExceptionUtility.ArgumentNull(nameof(bulkSessionKey)); } if (randomNumberGenerator == null) { throw ExceptionUtility.ArgumentNull(nameof(randomNumberGenerator)); } var hSessionKey = SafeKeyHandleImpl.InvalidHandle; if (!CryptoApi.CryptGenKey(providerHandle, Constants.CALG_G28147, 0, ref hSessionKey)) { throw CreateWin32Error(); } var keyWrap = new Gost_28147_89_KeyExchangeInfo { EncryptedKey = new byte[32] }; Array.Copy(bulkSessionKey, keyWrap.EncryptedKey, 32); SetKeyParameterInt32(hSessionKey, Constants.KP_MODE, Constants.CRYPT_MODE_ECB); SetKeyParameterInt32(hSessionKey, Constants.KP_ALGID, Constants.CALG_G28147); SetKeyParameterInt32(hSessionKey, Constants.KP_PADDING, Constants.ZERO_PADDING); uint sessionKeySize = 32; if (!CryptoApi.CryptEncrypt(hSessionKey, SafeHashHandleImpl.InvalidHandle, true, 0, keyWrap.EncryptedKey, ref sessionKeySize, sessionKeySize)) { throw CreateWin32Error(); } SetKeyParameterInt32(hSessionKey, Constants.KP_MODE, Constants.CRYPT_MODE_CFB); var hashHandle = CreateHashImit(providerHandle, hSessionKey); keyWrap.Ukm = new byte[8]; randomNumberGenerator.GetBytes(keyWrap.Ukm); if (!CryptoApi.CryptSetHashParam(hashHandle, Constants.HP_HASHSTARTVECT, keyWrap.Ukm, 0)) { throw CreateWin32Error(); } if (!CryptoApi.CryptHashData(hashHandle, bulkSessionKey, 32, 0)) { throw CreateWin32Error(); } keyWrap.Mac = EndHashData(hashHandle); keyWrap.EncryptionParamSet = GetKeyParameterString(hSessionKey, Constants.KP_CIPHEROID); SetKeyExchangeExportAlgId(providerType, hSessionKey, Constants.CALG_SIMPLE_EXPORT); SetKeyParameterInt32(hSessionKey, Constants.KP_MODE, Constants.CRYPT_MODE_ECB); SetKeyParameterInt32(hSessionKey, Constants.KP_PADDING, Constants.ZERO_PADDING); return(ImportKeyExchange(providerHandle, keyWrap, hSessionKey)); }