diff options
Diffstat (limited to 'crypto/src/asn1/Asn1Utilities.cs')
| -rw-r--r-- | crypto/src/asn1/Asn1Utilities.cs | 133 |
1 files changed, 129 insertions, 4 deletions
diff --git a/crypto/src/asn1/Asn1Utilities.cs b/crypto/src/asn1/Asn1Utilities.cs index 7b014ef00..8a6d931c0 100644 --- a/crypto/src/asn1/Asn1Utilities.cs +++ b/crypto/src/asn1/Asn1Utilities.cs @@ -1,4 +1,5 @@ using System; +using System.IO; namespace Org.BouncyCastle.Asn1 { @@ -15,6 +16,18 @@ namespace Org.BouncyCastle.Asn1 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 string GetTagText(Asn1Tag tag) { @@ -26,6 +39,11 @@ namespace Org.BouncyCastle.Asn1 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) @@ -118,9 +136,7 @@ namespace Org.BouncyCastle.Asn1 int baseTagClass, int baseTagNo) { if (!taggedObject.HasTag(tagClass, tagNo)) - { return null; - } return taggedObject.GetImplicitBaseTagged(baseTagClass, baseTagNo); } @@ -152,9 +168,7 @@ namespace Org.BouncyCastle.Asn1 bool declaredExplicit, int baseTagNo) { if (!taggedObject.HasTag(tagClass, tagNo)) - { return null; - } return taggedObject.GetBaseUniversal(declaredExplicit, baseTagNo); } @@ -164,5 +178,116 @@ namespace Org.BouncyCastle.Asn1 { return TryGetBaseUniversal(taggedObject, Asn1Tags.ContextSpecific, tagNo, declaredExplicit, baseTagNo); } + + + /* + * Wrappers for Asn1TaggedObjectParser.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, + int tagNo) + { + return ParseExplicitBaseTagged(taggedObjectParser, Asn1Tags.ContextSpecific, tagNo); + } + + /// <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, 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); + } } } |