Dec2017-Script-Dump/mscorlib/Mono/Security/X509/X509Chain.cs

using System;
using Mono.Security.X509.Extensions;

namespace Mono.Security.X509
{
	// Token: 0x020000BF RID: 191
	internal class X509Chain
	{
		// Token: 0x06000A68 RID: 2664 RVA: 0x0002E464 File Offset: 0x0002C664
		public X509Chain()
		{
			this.certs = new X509CertificateCollection();
		}

		// Token: 0x06000A69 RID: 2665 RVA: 0x0002E478 File Offset: 0x0002C678
		public X509Chain(X509CertificateCollection chain)
			: this()
		{
			this._chain = new X509CertificateCollection();
			this._chain.AddRange(chain);
		}

		// Token: 0x17000152 RID: 338
		// (get) Token: 0x06000A6A RID: 2666 RVA: 0x0002E498 File Offset: 0x0002C698
		public X509CertificateCollection Chain
		{
			get
			{
				return this._chain;
			}
		}

		// Token: 0x17000153 RID: 339
		// (get) Token: 0x06000A6B RID: 2667 RVA: 0x0002E4A0 File Offset: 0x0002C6A0
		public X509Certificate Root
		{
			get
			{
				return this._root;
			}
		}

		// Token: 0x17000154 RID: 340
		// (get) Token: 0x06000A6C RID: 2668 RVA: 0x0002E4A8 File Offset: 0x0002C6A8
		public X509ChainStatusFlags Status
		{
			get
			{
				return this._status;
			}
		}

		// Token: 0x17000155 RID: 341
		// (get) Token: 0x06000A6D RID: 2669 RVA: 0x0002E4B0 File Offset: 0x0002C6B0
		// (set) Token: 0x06000A6E RID: 2670 RVA: 0x0002E4E8 File Offset: 0x0002C6E8
		public X509CertificateCollection TrustAnchors
		{
			get
			{
				if (this.roots == null)
				{
					this.roots = new X509CertificateCollection();
					this.roots.AddRange(X509StoreManager.TrustedRootCertificates);
					return this.roots;
				}
				return this.roots;
			}
			set
			{
				this.roots = value;
			}
		}

		// Token: 0x06000A6F RID: 2671 RVA: 0x0002E4F4 File Offset: 0x0002C6F4
		public void LoadCertificate(X509Certificate x509)
		{
			this.certs.Add(x509);
		}

		// Token: 0x06000A70 RID: 2672 RVA: 0x0002E504 File Offset: 0x0002C704
		public void LoadCertificates(X509CertificateCollection collection)
		{
			this.certs.AddRange(collection);
		}

		// Token: 0x06000A71 RID: 2673 RVA: 0x0002E514 File Offset: 0x0002C714
		public X509Certificate FindByIssuerName(string issuerName)
		{
			foreach (X509Certificate x509Certificate in this.certs)
			{
				if (x509Certificate.IssuerName == issuerName)
				{
					return x509Certificate;
				}
			}
			return null;
		}

		// Token: 0x06000A72 RID: 2674 RVA: 0x0002E594 File Offset: 0x0002C794
		public bool Build(X509Certificate leaf)
		{
			this._status = X509ChainStatusFlags.NoError;
			if (this._chain == null)
			{
				this._chain = new X509CertificateCollection();
				X509Certificate x509Certificate = leaf;
				X509Certificate x509Certificate2 = x509Certificate;
				while (x509Certificate != null && !x509Certificate.IsSelfSigned)
				{
					x509Certificate2 = x509Certificate;
					this._chain.Add(x509Certificate);
					x509Certificate = this.FindCertificateParent(x509Certificate);
				}
				this._root = this.FindCertificateRoot(x509Certificate2);
			}
			else
			{
				int count = this._chain.Count;
				if (count > 0)
				{
					if (this.IsParent(leaf, this._chain[0]))
					{
						int i;
						for (i = 1; i < count; i++)
						{
							if (!this.IsParent(this._chain[i - 1], this._chain[i]))
							{
								break;
							}
						}
						if (i == count)
						{
							this._root = this.FindCertificateRoot(this._chain[count - 1]);
						}
					}
				}
				else
				{
					this._root = this.FindCertificateRoot(leaf);
				}
			}
			if (this._chain != null && this._status == X509ChainStatusFlags.NoError)
			{
				foreach (X509Certificate x509Certificate3 in this._chain)
				{
					if (!this.IsValid(x509Certificate3))
					{
						return false;
					}
				}
				if (!this.IsValid(leaf))
				{
					if (this._status == X509ChainStatusFlags.NotTimeNested)
					{
						this._status = X509ChainStatusFlags.NotTimeValid;
					}
					return false;
				}
				if (this._root != null && !this.IsValid(this._root))
				{
					return false;
				}
			}
			IL_1A6:
			return this._status == X509ChainStatusFlags.NoError;
		}

		// Token: 0x06000A73 RID: 2675 RVA: 0x0002E770 File Offset: 0x0002C970
		public void Reset()
		{
			this._status = X509ChainStatusFlags.NoError;
			this.roots = null;
			this.certs.Clear();
			if (this._chain != null)
			{
				this._chain.Clear();
			}
		}

		// Token: 0x06000A74 RID: 2676 RVA: 0x0002E7A4 File Offset: 0x0002C9A4
		private bool IsValid(X509Certificate cert)
		{
			if (!cert.IsCurrent)
			{
				this._status = X509ChainStatusFlags.NotTimeNested;
				return false;
			}
			return true;
		}

		// Token: 0x06000A75 RID: 2677 RVA: 0x0002E7BC File Offset: 0x0002C9BC
		private X509Certificate FindCertificateParent(X509Certificate child)
		{
			foreach (X509Certificate x509Certificate in this.certs)
			{
				if (this.IsParent(child, x509Certificate))
				{
					return x509Certificate;
				}
			}
			return null;
		}

		// Token: 0x06000A76 RID: 2678 RVA: 0x0002E838 File Offset: 0x0002CA38
		private X509Certificate FindCertificateRoot(X509Certificate potentialRoot)
		{
			if (potentialRoot == null)
			{
				this._status = X509ChainStatusFlags.PartialChain;
				return null;
			}
			if (this.IsTrusted(potentialRoot))
			{
				return potentialRoot;
			}
			foreach (X509Certificate x509Certificate in this.TrustAnchors)
			{
				if (this.IsParent(potentialRoot, x509Certificate))
				{
					return x509Certificate;
				}
			}
			if (potentialRoot.IsSelfSigned)
			{
				this._status = X509ChainStatusFlags.UntrustedRoot;
				return potentialRoot;
			}
			this._status = X509ChainStatusFlags.PartialChain;
			return null;
		}

		// Token: 0x06000A77 RID: 2679 RVA: 0x0002E8F4 File Offset: 0x0002CAF4
		private bool IsTrusted(X509Certificate potentialTrusted)
		{
			return this.TrustAnchors.Contains(potentialTrusted);
		}

		// Token: 0x06000A78 RID: 2680 RVA: 0x0002E904 File Offset: 0x0002CB04
		private bool IsParent(X509Certificate child, X509Certificate parent)
		{
			if (child.IssuerName != parent.SubjectName)
			{
				return false;
			}
			if (parent.Version > 2 && !this.IsTrusted(parent))
			{
				X509Extension x509Extension = parent.Extensions["2.5.29.19"];
				if (x509Extension != null)
				{
					BasicConstraintsExtension basicConstraintsExtension = new BasicConstraintsExtension(x509Extension);
					if (!basicConstraintsExtension.CertificateAuthority)
					{
						this._status = X509ChainStatusFlags.InvalidBasicConstraints;
					}
				}
				else
				{
					this._status = X509ChainStatusFlags.InvalidBasicConstraints;
				}
			}
			if (!child.VerifySignature(parent.RSA))
			{
				this._status = X509ChainStatusFlags.NotSignatureValid;
				return false;
			}
			return true;
		}

		// Token: 0x040002AD RID: 685
		private X509CertificateCollection roots;

		// Token: 0x040002AE RID: 686
		private X509CertificateCollection certs;

		// Token: 0x040002AF RID: 687
		private X509Certificate _root;

		// Token: 0x040002B0 RID: 688
		private X509CertificateCollection _chain;

		// Token: 0x040002B1 RID: 689
		private X509ChainStatusFlags _status;
	}
}