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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| using Org.BouncyCastle.Utilities; | ||
| using System; | ||
|
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||
|
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||
| namespace Org.BouncyCastle.Asn1.Nist | ||
| { | ||
| /// <summary> | ||
| /// KMACwithSHAKE128-params ::= SEQUENCE { | ||
| /// kMACOutputLength INTEGER DEFAULT 256, -- Output length in bits | ||
| /// customizationString OCTET STRING DEFAULT ''H | ||
| /// } | ||
| /// </summary> | ||
| public class KMacWithShake128Params : Asn1Encodable | ||
| { | ||
| private static readonly byte[] EMPTY_STRING = new byte[0]; | ||
| private static readonly int DEF_LENGTH = 256; | ||
|
|
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| private readonly int outputLength; | ||
| private readonly byte[] customizationString; | ||
|
|
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| public KMacWithShake128Params(int outputLength) | ||
| { | ||
| this.outputLength = outputLength; | ||
| this.customizationString = EMPTY_STRING; | ||
| } | ||
|
|
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| public KMacWithShake128Params(int outputLength, byte[] customizationString) | ||
| { | ||
| this.outputLength = outputLength; | ||
| this.customizationString = Arrays.Clone(customizationString); | ||
| } | ||
|
|
||
| public static KMacWithShake128Params GetInstance(object o) | ||
| { | ||
| if (o is KMacWithShake128Params) | ||
| { | ||
| return (KMacWithShake128Params)o; | ||
| } | ||
| else if (o != null) | ||
| { | ||
| return new KMacWithShake128Params(Asn1Sequence.GetInstance(o)); | ||
| } | ||
|
|
||
| return null; | ||
| } | ||
|
|
||
| private KMacWithShake128Params(Asn1Sequence seq) | ||
| { | ||
| if (seq.Count > 2) | ||
| throw new InvalidOperationException("sequence size greater than 2"); | ||
|
|
||
| if (seq.Count == 2) | ||
| { | ||
| this.outputLength = DerInteger.GetInstance(seq[0]).IntValueExact; | ||
| this.customizationString = Arrays.Clone(Asn1OctetString.GetInstance(seq[1]).GetOctets()); | ||
| } | ||
| else if (seq.Count == 1) | ||
| { | ||
| if (seq[0] is DerInteger) | ||
| { | ||
| this.outputLength = DerInteger.GetInstance(seq[0]).IntValueExact; | ||
| this.customizationString = EMPTY_STRING; | ||
| } | ||
| else | ||
| { | ||
| this.outputLength = DEF_LENGTH; | ||
| this.customizationString = Arrays.Clone(Asn1OctetString.GetInstance(seq[0]).GetOctets()); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| this.outputLength = DEF_LENGTH; | ||
| this.customizationString = EMPTY_STRING; | ||
| } | ||
| } | ||
|
|
||
| public int OutputLength | ||
| { | ||
| get { return outputLength; } | ||
| } | ||
|
|
||
| public byte[] CustomizationString | ||
| { | ||
| get { return Arrays.Clone(customizationString); } | ||
| } | ||
|
|
||
| public override Asn1Object ToAsn1Object() | ||
| { | ||
| Asn1EncodableVector v = new Asn1EncodableVector(); | ||
| if (outputLength != DEF_LENGTH) | ||
| { | ||
| v.Add(new DerInteger(outputLength)); | ||
| } | ||
|
|
||
| if (customizationString.Length != 0) | ||
| { | ||
| v.Add(new DerOctetString(CustomizationString)); | ||
| } | ||
|
|
||
| return new DerSequence(v); | ||
| } | ||
| } | ||
| } |
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