pdfencryption.cs

PDF文档生成解析使用的库,可以用来改写自己的文档格式

using System;
using System.Collections.Generic;
using System.Text;
using AnotherPDFLib.PdfGraphics;

namespace AnotherPDFLib
{
	public partial class PdfEncryption : PdfDictionary
	{
		/// <summary>
		/// The name of the preferred security handler for this document.
		/// </summary>
		public string Filter
		{
			get
			{
				PdfName filter = this["Filter"] as PdfName;
				if (filter != null)
				{
					return filter.Value;
				}
				return String.Empty;
			}
			set
			{
				this["Filter"] = new PdfName(value);
			}
		}

		/// <summary>
		/// A name that completely specifies the format and interpretation of the contents of the encryption dictionary.
		/// </summary>
		public string SubFilter
		{
			get
			{
				PdfName subfilter = this["SubFilter"] as PdfName;
				if (subfilter != null)
				{
					return subfilter.Value;
				}
				return String.Empty;
			}
			set
			{
				this["SubFilter"] = new PdfName(value);
			}
		}

		/// <summary>
		/// A code specifying the algorithm to be used in encrypting and decrypting the document.
		/// </summary>
		public int Version
		{
			get
			{
				PdfInteger version = this["V"] as PdfInteger;
				if (version != null)
				{
					return version.Value;
				}
				return 0;
			}
			set
			{
				this["V"] = new PdfInteger(value);
			}
		}

		/// <summary>
		/// The length of the encryption key, in bits. The value must be a multiple of 8, in the range 40 to 128.
		/// </summary>
		public int KeyLength
		{
			get
			{
				PdfInteger keylength = this["Length"] as PdfInteger;
				if (keylength != null)
				{
					return keylength.Value;
				}
				return 40;
			}
			set
			{
				this["Length"] = new PdfInteger(value);
			}
		}

		/// <summary>
		/// A dictionary whose keys are crypt filter names and whose values are the corresponding crypt filter dictionaries.
		/// </summary>
		public PdfDictionary CryptFilters
		{
			get
			{
				return this["CF"] as PdfDictionary;
			}
			set
			{
				this["CF"] = value;
			}
		}

		/// <summary>
		/// The name of the crypt filter that is used by default when decrypting streams. The name must be a key in the CF dictionary or a standard crypt filter name.
		/// </summary>
		public string StreamFilter
		{
			get
			{
				PdfName streamfilter = this["StmF"] as PdfName;
				if (streamfilter != null)
				{
					return streamfilter.Value;
				}
				return String.Empty;
			}
			set
			{
				this["StmF"] = new PdfName(value);
			}
		}

		/// <summary>
		/// The name of the crypt filter that is used when decrypting all strings in the document. The name must be a key in the CF dictionary or a standard crypt filter name.
		/// </summary>
		public string StringFilter
		{
			get
			{
				PdfName stringfilter = this["StrF"] as PdfName;
				if (stringfilter != null)
				{
					return stringfilter.Value;
				}
				return String.Empty;
			}
			set
			{
				this["StrF"] = new PdfName(value);
			}
		}

		/// <summary>
		/// The name of the crypt filter that should be used by default when encrypting embedded file streams; it must correspond to a key in the CF dictionary or a standard crypt filter name.
		/// </summary>
		public string EmbeddedFileFilter
		{
			get
			{
				PdfName embeddedfilefilter = this["EFF"] as PdfName;
				if (embeddedfilefilter != null)
				{
					return embeddedfilefilter.Value;
				}
				return String.Empty;
			}
			set
			{
				this["EFF"] = new PdfName(value);
			}
		}

	}
}