135 lines
5.3 KiB
C#
135 lines
5.3 KiB
C#
#region PDFsharp - A .NET library for processing PDF
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//
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// Authors:
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// Stefan Lange
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//
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// Copyright (c) 2005-2016 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.PdfSharpCore.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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namespace PdfSharpCore.Pdf.AcroForms
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{
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/// <summary>
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/// Represents the signature field.
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/// </summary>
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public sealed class PdfSignatureField : PdfAcroField
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{
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/// <summary>
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/// Initializes a new instance of PdfSignatureField.
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/// </summary>
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internal PdfSignatureField(PdfDocument document)
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: base(document)
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{ }
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internal PdfSignatureField(PdfDictionary dict)
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: base(dict)
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{ }
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/// <summary>
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/// Predefined keys of this dictionary.
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/// The description comes from PDF 1.4 Reference.
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/// </summary>
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public new class Keys : PdfAcroField.Keys
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{
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/// <summary>
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/// (Optional) The type of PDF object that this dictionary describes; if present,
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/// must be Sig for a signature dictionary.
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/// </summary>
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[KeyInfo(KeyType.Name | KeyType.Optional)]
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public new const string Type = "/Type";
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/// <summary>
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/// (Required; inheritable) The name of the signature handler to be used for
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/// authenticating the field’s contents, such as Adobe.PPKLite, Entrust.PPKEF,
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/// CICI.SignIt, or VeriSign.PPKVS.
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/// </summary>
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[KeyInfo(KeyType.Name | KeyType.Required)]
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public const string Filter = "/Filter";
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/// <summary>
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/// (Optional) The name of a specific submethod of the specified handler.
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/// </summary>
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[KeyInfo(KeyType.Name | KeyType.Optional)]
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public const string SubFilter = "/SubFilter";
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/// <summary>
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/// (Required) An array of pairs of integers (starting byte offset, length in bytes)
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/// describing the exact byte range for the digest calculation. Multiple discontinuous
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/// byte ranges may be used to describe a digest that does not include the
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/// signature token itself.
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/// </summary>
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[KeyInfo(KeyType.Array | KeyType.Required)]
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public const string ByteRange = "/ByteRange";
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/// <summary>
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/// (Required) The encrypted signature token.
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/// </summary>
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[KeyInfo(KeyType.String | KeyType.Required)]
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public const string Contents = "/Contents";
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/// <summary>
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/// (Optional) The name of the person or authority signing the document.
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/// </summary>
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[KeyInfo(KeyType.TextString | KeyType.Optional)]
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public const string Name = "/Name";
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/// <summary>
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/// (Optional) The time of signing. Depending on the signature handler, this
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/// may be a normal unverified computer time or a time generated in a verifiable
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/// way from a secure time server.
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/// </summary>
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[KeyInfo(KeyType.Date | KeyType.Optional)]
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public const string M = "/M";
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/// <summary>
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/// (Optional) The CPU host name or physical location of the signing.
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/// </summary>
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[KeyInfo(KeyType.TextString | KeyType.Optional)]
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public const string Location = "/Location";
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/// <summary>
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/// (Optional) The reason for the signing, such as (I agree…).
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/// </summary>
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[KeyInfo(KeyType.TextString | KeyType.Optional)]
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public const string Reason = "/Reason";
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/// <summary>
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/// Gets the KeysMeta for these keys.
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/// </summary>
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internal static DictionaryMeta Meta
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{
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get { return _meta ?? (_meta = CreateMeta(typeof(Keys))); }
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}
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static DictionaryMeta _meta;
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}
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/// <summary>
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/// Gets the KeysMeta of this dictionary type.
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/// </summary>
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internal override DictionaryMeta Meta
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{
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get { return Keys.Meta; }
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}
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}
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}
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