1 files changed, 40 insertions, 56 deletions

diff --git a/crypto/src/asn1/esf/SignaturePolicyId.cs b/crypto/src/asn1/esf/SignaturePolicyId.cs
index 21bb40560..84e9f8c62 100644
--- a/crypto/src/asn1/esf/SignaturePolicyId.cs
+++ b/crypto/src/asn1/esf/SignaturePolicyId.cs
@@ -21,119 +21,103 @@ namespace Org.BouncyCastle.Asn1.Esf
 	public class SignaturePolicyId
 		: Asn1Encodable
 	{
-		private readonly DerObjectIdentifier	sigPolicyIdentifier;
-		private readonly OtherHashAlgAndValue	sigPolicyHash;
-		private readonly Asn1Sequence			sigPolicyQualifiers;
+		private readonly DerObjectIdentifier m_sigPolicyIdentifier;
+		private readonly OtherHashAlgAndValue m_sigPolicyHash;
+		private readonly Asn1Sequence m_sigPolicyQualifiers;
 
-		public static SignaturePolicyId GetInstance(
-			object obj)
+		public static SignaturePolicyId GetInstance(object obj)
 		{
-			if (obj == null || obj is SignaturePolicyId)
-				return (SignaturePolicyId) obj;
+			if (obj == null)
+				return null;
+
+			if (obj is SignaturePolicyId signaturePolicyId)
+				return signaturePolicyId;
 
-			if (obj is Asn1Sequence)
-				return new SignaturePolicyId((Asn1Sequence) obj);
+			if (obj is Asn1Sequence asn1Sequence)
+				return new SignaturePolicyId(asn1Sequence);
 
-			throw new ArgumentException(
-				"Unknown object in 'SignaturePolicyId' factory: "
-                    + Platform.GetTypeName(obj),
-				"obj");
+			throw new ArgumentException("Unknown object in 'SignaturePolicyId' factory: " + Platform.GetTypeName(obj),
+				nameof(obj));
 		}
 
-		private SignaturePolicyId(
-			Asn1Sequence seq)
+		private SignaturePolicyId(Asn1Sequence seq)
 		{
 			if (seq == null)
-				throw new ArgumentNullException("seq");
+				throw new ArgumentNullException(nameof(seq));
 			if (seq.Count < 2 || seq.Count > 3)
-				throw new ArgumentException("Bad sequence size: " + seq.Count, "seq");
+				throw new ArgumentException("Bad sequence size: " + seq.Count, nameof(seq));
 
-			this.sigPolicyIdentifier = (DerObjectIdentifier) seq[0].ToAsn1Object();
-			this.sigPolicyHash = OtherHashAlgAndValue.GetInstance(seq[1].ToAsn1Object());
+			m_sigPolicyIdentifier = (DerObjectIdentifier)seq[0].ToAsn1Object();
+			m_sigPolicyHash = OtherHashAlgAndValue.GetInstance(seq[1].ToAsn1Object());
 
 			if (seq.Count > 2)
 			{
-				this.sigPolicyQualifiers = (Asn1Sequence) seq[2].ToAsn1Object();
+				m_sigPolicyQualifiers = (Asn1Sequence)seq[2].ToAsn1Object();
 			}
 		}
 
-		public SignaturePolicyId(
-			DerObjectIdentifier		sigPolicyIdentifier,
-			OtherHashAlgAndValue	sigPolicyHash)
+		public SignaturePolicyId(DerObjectIdentifier sigPolicyIdentifier, OtherHashAlgAndValue sigPolicyHash)
 			: this(sigPolicyIdentifier, sigPolicyHash, null)
 		{
 		}
 
-		public SignaturePolicyId(
-			DerObjectIdentifier				sigPolicyIdentifier,
-			OtherHashAlgAndValue			sigPolicyHash,
+		public SignaturePolicyId(DerObjectIdentifier sigPolicyIdentifier, OtherHashAlgAndValue sigPolicyHash,
 			params SigPolicyQualifierInfo[]	sigPolicyQualifiers)
 		{
 			if (sigPolicyIdentifier == null)
-				throw new ArgumentNullException("sigPolicyIdentifier");
+				throw new ArgumentNullException(nameof(sigPolicyIdentifier));
 			if (sigPolicyHash == null)
-				throw new ArgumentNullException("sigPolicyHash");
+				throw new ArgumentNullException(nameof(sigPolicyHash));
 
-			this.sigPolicyIdentifier = sigPolicyIdentifier;
-			this.sigPolicyHash = sigPolicyHash;
+			m_sigPolicyIdentifier = sigPolicyIdentifier;
+			m_sigPolicyHash = sigPolicyHash;
 
 			if (sigPolicyQualifiers != null)
 			{
-				this.sigPolicyQualifiers = new DerSequence(sigPolicyQualifiers);
+				m_sigPolicyQualifiers = new DerSequence(sigPolicyQualifiers);
 			}
 		}
 
-		public SignaturePolicyId(
-			DerObjectIdentifier sigPolicyIdentifier,
-			OtherHashAlgAndValue sigPolicyHash,
+		public SignaturePolicyId(DerObjectIdentifier sigPolicyIdentifier, OtherHashAlgAndValue sigPolicyHash,
 			IEnumerable<SigPolicyQualifierInfo> sigPolicyQualifiers)
 		{
-			if (sigPolicyIdentifier == null)
-				throw new ArgumentNullException("sigPolicyIdentifier");
-			if (sigPolicyHash == null)
-				throw new ArgumentNullException("sigPolicyHash");
+            if (sigPolicyIdentifier == null)
+                throw new ArgumentNullException(nameof(sigPolicyIdentifier));
+            if (sigPolicyHash == null)
+                throw new ArgumentNullException(nameof(sigPolicyHash));
 
-			this.sigPolicyIdentifier = sigPolicyIdentifier;
-			this.sigPolicyHash = sigPolicyHash;
+			m_sigPolicyIdentifier = sigPolicyIdentifier;
+			m_sigPolicyHash = sigPolicyHash;
 
 			if (sigPolicyQualifiers != null)
 			{
-				this.sigPolicyQualifiers = new DerSequence(
-					Asn1EncodableVector.FromEnumerable(sigPolicyQualifiers));
+				m_sigPolicyQualifiers = new DerSequence(Asn1EncodableVector.FromEnumerable(sigPolicyQualifiers));
 			}
 		}
 
 		public DerObjectIdentifier SigPolicyIdentifier
 		{
-			get { return sigPolicyIdentifier; }
+			get { return m_sigPolicyIdentifier; }
 		}
 
 		public OtherHashAlgAndValue SigPolicyHash
 		{
-			get { return sigPolicyHash; }
+			get { return m_sigPolicyHash; }
 		}
 
 		public SigPolicyQualifierInfo[] GetSigPolicyQualifiers()
 		{
-			if (sigPolicyQualifiers == null)
-				return null;
-
-			SigPolicyQualifierInfo[] infos = new SigPolicyQualifierInfo[sigPolicyQualifiers.Count];
-			for (int i = 0; i < sigPolicyQualifiers.Count; ++i)
-			{
-				infos[i] = SigPolicyQualifierInfo.GetInstance(sigPolicyQualifiers[i]);
-			}
-			return infos;
+			return m_sigPolicyQualifiers?.MapElements(SigPolicyQualifierInfo.GetInstance);
 		}
 
 		public override Asn1Object ToAsn1Object()
 		{
 			Asn1EncodableVector v = new Asn1EncodableVector(
-				sigPolicyIdentifier, sigPolicyHash.ToAsn1Object());
+				m_sigPolicyIdentifier, m_sigPolicyHash.ToAsn1Object());
 
-			if (sigPolicyQualifiers != null)
+			if (m_sigPolicyQualifiers != null)
 			{
-				v.Add(sigPolicyQualifiers.ToAsn1Object());
+				v.Add(m_sigPolicyQualifiers.ToAsn1Object());
 			}
 
 			return new DerSequence(v);