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using System;
using System.IO;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1
{
public abstract class Asn1Utilities
{
internal static Asn1TaggedObject CheckTagClass(Asn1TaggedObject taggedObject, int tagClass)
{
if (!taggedObject.HasTagClass(tagClass))
{
string expected = GetTagClassText(tagClass);
string found = GetTagClassText(taggedObject);
throw new InvalidOperationException("Expected " + expected + " tag but found " + found);
}
return taggedObject;
}
internal static Asn1TaggedObjectParser CheckTagClass(Asn1TaggedObjectParser taggedObjectParser, int tagClass)
{
if (taggedObjectParser.TagClass != tagClass)
{
string expected = GetTagClassText(tagClass);
string found = GetTagClassText(taggedObjectParser);
throw new InvalidOperationException("Expected " + expected + " tag but found " + found);
}
return taggedObjectParser;
}
internal static Asn1TaggedObject CheckTag(Asn1TaggedObject taggedObject, int tagClass, int tagNo)
{
if (!taggedObject.HasTag(tagClass, tagNo))
{
string expected = GetTagText(tagClass, tagNo);
string found = GetTagText(taggedObject);
throw new InvalidOperationException("Expected " + expected + " tag but found " + found);
}
return taggedObject;
}
internal static Asn1TaggedObjectParser CheckTag(Asn1TaggedObjectParser taggedObjectParser, int tagClass,
int tagNo)
{
if (!taggedObjectParser.HasTag(tagClass, tagNo))
{
string expected = GetTagText(tagClass, tagNo);
string found = GetTagText(taggedObjectParser);
throw new InvalidOperationException("Expected " + expected + " tag but found " + found);
}
return taggedObjectParser;
}
internal static TChoice GetInstanceFromChoice<TChoice>(Asn1TaggedObject taggedObject, bool declaredExplicit,
Func<object, TChoice> constructor)
where TChoice : Asn1Encodable, IAsn1Choice
{
if (!declaredExplicit)
{
var message = string.Format(
"Implicit tagging cannot be used with untagged choice type {0} (X.680 30.6, 30.8).",
Platform.GetTypeName(typeof(TChoice)));
throw new ArgumentException(message, nameof(declaredExplicit));
}
return constructor(taggedObject.GetExplicitBaseObject());
}
public static string GetTagClassText(int tagClass)
{
switch (tagClass)
{
case Asn1Tags.Application:
return "APPLICATION";
case Asn1Tags.ContextSpecific:
return "CONTEXT";
case Asn1Tags.Private:
return "PRIVATE";
default:
return "UNIVERSAL";
}
}
public static string GetTagClassText(Asn1TaggedObject taggedObject)
{
return GetTagClassText(taggedObject.TagClass);
}
public static string GetTagClassText(Asn1TaggedObjectParser taggedObjectParser)
{
return GetTagClassText(taggedObjectParser.TagClass);
}
internal static string GetTagText(Asn1Tag tag)
{
return GetTagText(tag.TagClass, tag.TagNo);
}
public static string GetTagText(Asn1TaggedObject taggedObject)
{
return GetTagText(taggedObject.TagClass, taggedObject.TagNo);
}
public static string GetTagText(Asn1TaggedObjectParser taggedObjectParser)
{
return GetTagText(taggedObjectParser.TagClass, taggedObjectParser.TagNo);
}
public static string GetTagText(int tagClass, int tagNo)
{
switch (tagClass)
{
case Asn1Tags.Application:
return string.Format("[APPLICATION {0}]", tagNo);
case Asn1Tags.ContextSpecific:
return string.Format("[CONTEXT {0}]", tagNo);
case Asn1Tags.Private:
return string.Format("[PRIVATE {0}]", tagNo);
default:
return string.Format("[UNIVERSAL {0}]", tagNo);
}
}
/*
* Wrappers for Asn1TaggedObject.GetExplicitBaseObject
*/
public static Asn1Encodable GetExplicitBaseObject(Asn1TaggedObject taggedObject, int tagClass, int tagNo)
{
return CheckTag(taggedObject, tagClass, tagNo).GetExplicitBaseObject();
}
public static Asn1Encodable GetExplicitContextBaseObject(Asn1TaggedObject taggedObject, int tagNo)
{
return GetExplicitBaseObject(taggedObject, Asn1Tags.ContextSpecific, tagNo);
}
public static Asn1Encodable TryGetExplicitBaseObject(Asn1TaggedObject taggedObject, int tagClass, int tagNo)
{
if (!taggedObject.HasTag(tagClass, tagNo))
return null;
return taggedObject.GetExplicitBaseObject();
}
public static Asn1Encodable TryGetExplicitContextBaseObject(Asn1TaggedObject taggedObject, int tagNo)
{
return TryGetExplicitBaseObject(taggedObject, Asn1Tags.ContextSpecific, tagNo);
}
/*
* Wrappers for Asn1TaggedObject.GetExplicitBaseTagged
*/
public static Asn1TaggedObject GetExplicitBaseTagged(Asn1TaggedObject taggedObject, int tagClass)
{
return CheckTagClass(taggedObject, tagClass).GetExplicitBaseTagged();
}
public static Asn1TaggedObject GetExplicitBaseTagged(Asn1TaggedObject taggedObject, int tagClass, int tagNo)
{
return CheckTag(taggedObject, tagClass, tagNo).GetExplicitBaseTagged();
}
public static Asn1TaggedObject GetExplicitContextBaseTagged(Asn1TaggedObject taggedObject)
{
return GetExplicitBaseTagged(taggedObject, Asn1Tags.ContextSpecific);
}
public static Asn1TaggedObject GetExplicitContextBaseTagged(Asn1TaggedObject taggedObject, int tagNo)
{
return GetExplicitBaseTagged(taggedObject, Asn1Tags.ContextSpecific, tagNo);
}
public static Asn1TaggedObject TryGetExplicitBaseTagged(Asn1TaggedObject taggedObject, int tagClass)
{
if (!taggedObject.HasTagClass(tagClass))
return null;
return taggedObject.GetExplicitBaseTagged();
}
public static Asn1TaggedObject TryGetExplicitBaseTagged(Asn1TaggedObject taggedObject, int tagClass, int tagNo)
{
if (!taggedObject.HasTag(tagClass, tagNo))
return null;
return taggedObject.GetExplicitBaseTagged();
}
public static Asn1TaggedObject TryGetExplicitContextBaseTagged(Asn1TaggedObject taggedObject)
{
return TryGetExplicitBaseTagged(taggedObject, Asn1Tags.ContextSpecific);
}
public static Asn1TaggedObject TryGetExplicitContextBaseTagged(Asn1TaggedObject taggedObject, int tagNo)
{
return TryGetExplicitBaseTagged(taggedObject, Asn1Tags.ContextSpecific, tagNo);
}
/*
* Wrappers for Asn1TaggedObject.GetImplicitBaseTagged
*/
public static Asn1TaggedObject GetImplicitBaseTagged(Asn1TaggedObject taggedObject, int tagClass, int tagNo,
int baseTagClass, int baseTagNo)
{
return CheckTag(taggedObject, tagClass, tagNo).GetImplicitBaseTagged(baseTagClass, baseTagNo);
}
public static Asn1TaggedObject GetImplicitContextBaseTagged(Asn1TaggedObject taggedObject, int tagNo,
int baseTagClass, int baseTagNo)
{
return GetImplicitBaseTagged(taggedObject, Asn1Tags.ContextSpecific, tagNo, baseTagClass, baseTagNo);
}
public static Asn1TaggedObject TryGetImplicitBaseTagged(Asn1TaggedObject taggedObject, int tagClass, int tagNo,
int baseTagClass, int baseTagNo)
{
if (!taggedObject.HasTag(tagClass, tagNo))
return null;
return taggedObject.GetImplicitBaseTagged(baseTagClass, baseTagNo);
}
public static Asn1TaggedObject TryGetImplicitContextBaseTagged(Asn1TaggedObject taggedObject, int tagNo,
int baseTagClass, int baseTagNo)
{
return TryGetImplicitBaseTagged(taggedObject, Asn1Tags.ContextSpecific, tagNo, baseTagClass, baseTagNo);
}
/*
* Wrappers for Asn1TaggedObject.GetBaseUniversal
*/
public static Asn1Object GetBaseUniversal(Asn1TaggedObject taggedObject, int tagClass, int tagNo,
bool declaredExplicit, int baseTagNo)
{
return CheckTag(taggedObject, tagClass, tagNo).GetBaseUniversal(declaredExplicit, baseTagNo);
}
public static Asn1Object GetContextBaseUniversal(Asn1TaggedObject taggedObject, int tagNo,
bool declaredExplicit, int baseTagNo)
{
return GetBaseUniversal(taggedObject, Asn1Tags.ContextSpecific, tagNo, declaredExplicit, baseTagNo);
}
public static Asn1Object TryGetBaseUniversal(Asn1TaggedObject taggedObject, int tagClass, int tagNo,
bool declaredExplicit, int baseTagNo)
{
if (!taggedObject.HasTag(tagClass, tagNo))
return null;
return taggedObject.GetBaseUniversal(declaredExplicit, baseTagNo);
}
public static Asn1Object TryGetContextBaseUniversal(Asn1TaggedObject taggedObject, int tagNo,
bool declaredExplicit, int baseTagNo)
{
return TryGetBaseUniversal(taggedObject, Asn1Tags.ContextSpecific, tagNo, declaredExplicit, baseTagNo);
}
/*
* Wrappers for Asn1TaggedObjectParser.ParseExplicitBaseTagged
*/
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser ParseExplicitBaseTagged(Asn1TaggedObjectParser taggedObjectParser,
int tagClass)
{
return CheckTagClass(taggedObjectParser, tagClass).ParseExplicitBaseTagged();
}
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser ParseExplicitBaseTagged(Asn1TaggedObjectParser taggedObjectParser,
int tagClass, int tagNo)
{
return CheckTag(taggedObjectParser, tagClass, tagNo).ParseExplicitBaseTagged();
}
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser ParseExplicitContextBaseTagged(Asn1TaggedObjectParser taggedObjectParser)
{
return ParseExplicitBaseTagged(taggedObjectParser, Asn1Tags.ContextSpecific);
}
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser ParseExplicitContextBaseTagged(Asn1TaggedObjectParser taggedObjectParser,
int tagNo)
{
return ParseExplicitBaseTagged(taggedObjectParser, Asn1Tags.ContextSpecific, tagNo);
}
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser TryParseExplicitBaseTagged(Asn1TaggedObjectParser taggedObjectParser,
int tagClass)
{
if (taggedObjectParser.TagClass != tagClass)
return null;
return taggedObjectParser.ParseExplicitBaseTagged();
}
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser TryParseExplicitBaseTagged(Asn1TaggedObjectParser taggedObjectParser,
int tagClass, int tagNo)
{
if (!taggedObjectParser.HasTag(tagClass, tagNo))
return null;
return taggedObjectParser.ParseExplicitBaseTagged();
}
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser TryParseExplicitContextBaseTagged(
Asn1TaggedObjectParser taggedObjectParser)
{
return TryParseExplicitBaseTagged(taggedObjectParser, Asn1Tags.ContextSpecific);
}
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser TryParseExplicitContextBaseTagged(
Asn1TaggedObjectParser taggedObjectParser, int tagNo)
{
return TryParseExplicitBaseTagged(taggedObjectParser, Asn1Tags.ContextSpecific, tagNo);
}
/*
* Wrappers for Asn1TaggedObjectParser.ParseImplicitBaseTagged
*/
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser ParseImplicitBaseTagged(Asn1TaggedObjectParser taggedObjectParser,
int tagClass, int tagNo, int baseTagClass, int baseTagNo)
{
return CheckTag(taggedObjectParser, tagClass, tagNo).ParseImplicitBaseTagged(baseTagClass, baseTagNo);
}
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser ParseImplicitContextBaseTagged(Asn1TaggedObjectParser taggedObjectParser,
int tagNo, int baseTagClass, int baseTagNo)
{
return ParseImplicitBaseTagged(taggedObjectParser, Asn1Tags.ContextSpecific, tagNo, baseTagClass,
baseTagNo);
}
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser TryParseImplicitBaseTagged(Asn1TaggedObjectParser taggedObjectParser,
int tagClass, int tagNo, int baseTagClass, int baseTagNo)
{
if (!taggedObjectParser.HasTag(tagClass, tagNo))
return null;
return taggedObjectParser.ParseImplicitBaseTagged(baseTagClass, baseTagNo);
}
/// <exception cref="IOException"/>
public static Asn1TaggedObjectParser TryParseImplicitContextBaseTagged(
Asn1TaggedObjectParser taggedObjectParser, int tagNo, int baseTagClass, int baseTagNo)
{
return TryParseImplicitBaseTagged(taggedObjectParser, Asn1Tags.ContextSpecific, tagNo, baseTagClass,
baseTagNo);
}
/*
* Wrappers for Asn1TaggedObjectParser.ParseBaseUniversal
*/
/// <exception cref="IOException"/>
public static IAsn1Convertible ParseBaseUniversal(Asn1TaggedObjectParser taggedObjectParser, int tagClass,
int tagNo, bool declaredExplicit, int baseTagNo)
{
return CheckTag(taggedObjectParser, tagClass, tagNo).ParseBaseUniversal(declaredExplicit, baseTagNo);
}
/// <exception cref="IOException"/>
public static IAsn1Convertible ParseContextBaseUniversal(Asn1TaggedObjectParser taggedObjectParser, int tagNo,
bool declaredExplicit, int baseTagNo)
{
return ParseBaseUniversal(taggedObjectParser, Asn1Tags.ContextSpecific, tagNo, declaredExplicit, baseTagNo);
}
/// <exception cref="IOException"/>
public static IAsn1Convertible TryParseBaseUniversal(Asn1TaggedObjectParser taggedObjectParser, int tagClass,
int tagNo, bool declaredExplicit, int baseTagNo)
{
if (!taggedObjectParser.HasTag(tagClass, tagNo))
return null;
return taggedObjectParser.ParseBaseUniversal(declaredExplicit, baseTagNo);
}
/// <exception cref="IOException"/>
public static IAsn1Convertible TryParseContextBaseUniversal(Asn1TaggedObjectParser taggedObjectParser,
int tagNo, bool declaredExplicit, int baseTagNo)
{
return TryParseBaseUniversal(taggedObjectParser, Asn1Tags.ContextSpecific, tagNo, declaredExplicit,
baseTagNo);
}
/*
* Wrappers for Asn1TaggedObjectParser.ParseExplicitBaseObject
*/
/// <exception cref="IOException"/>
public static IAsn1Convertible ParseExplicitBaseObject(Asn1TaggedObjectParser taggedObjectParser, int tagClass,
int tagNo)
{
return CheckTag(taggedObjectParser, tagClass, tagNo).ParseExplicitBaseObject();
}
/// <exception cref="IOException"/>
public static IAsn1Convertible ParseExplicitContextBaseObject(Asn1TaggedObjectParser taggedObjectParser,
int tagNo)
{
return ParseExplicitBaseObject(taggedObjectParser, Asn1Tags.ContextSpecific, tagNo);
}
/// <exception cref="IOException"/>
public static IAsn1Convertible TryParseExplicitBaseObject(Asn1TaggedObjectParser taggedObjectParser,
int tagClass, int tagNo)
{
if (!taggedObjectParser.HasTag(tagClass, tagNo))
return null;
return taggedObjectParser.ParseExplicitBaseObject();
}
/// <exception cref="IOException"/>
public static IAsn1Convertible TryParseExplicitContextBaseObject(Asn1TaggedObjectParser taggedObjectParser,
int tagNo)
{
return TryParseExplicitBaseObject(taggedObjectParser, Asn1Tags.ContextSpecific, tagNo);
}
}
}
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