/// <summary>
/// 整体加密文件
/// </summary>
/// <param name="sourceFile">待加密的文件名</param>
/// <param name="targetFile">保存加密文件名</param>
/// <param name="key">密钥字符串，长度为8或者24</param>
public static void EncryptFile(string sourceFile, string targetFile, string key)
{
sourceFile.CheckFileExists("sourceFile");
targetFile.CheckNotNullOrEmpty("targetFile");
key.CheckNotNullOrEmpty("key");
byte[] keyBytes = Encoding.UTF8.GetBytes(key);
DesHelper des = new DesHelper(keyBytes);
des.EncryptFile(sourceFile, targetFile);
}
/// <summary>
/// 分段加密文件
/// </summary>
/// <param name="sourceFile">待加密的文件名</param>
/// <param name="targetFile">保存加密文件名</param>
/// <param name="sectionLength">分段大小（字节）</param>
/// <param name="key">密钥字符串，长度为8或者24</param>
public static void EncryptFile(string sourceFile, string targetFile, int sectionLength, string key)
{
sourceFile.CheckFileExists("sourceFile");
targetFile.CheckNotNullOrEmpty("targetFile");
key.CheckNotNullOrEmpty("key");
sectionLength.CheckGreaterThan("sectionLength", 0);
byte[] keyBytes = Encoding.UTF8.GetBytes(key);
DesHelper des = new DesHelper(keyBytes);
des.EncryptFile(sourceFile, targetFile, sectionLength);
}