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Hcs.Client/GostXades/IssuerComparer.cs

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+using Hcs.GostXades.Abstractions;
+using Hcs.GostXades.Helpers;
+using Org.BouncyCastle.Asn1.X509;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text.RegularExpressions;
+
+namespace Hcs.GostXades
+{
+    public class IssuerComparer : IIssuerComparer
+    {
+        static IssuerComparer()
+        {
+            var regexps = new Dictionary<string, string>
+            {
+                ["^(ОГРН|OGRN|OID.1.2.643.100.1)="] = "1.2.643.100.1=",
+                ["^(ОГРНИП|OGRNIP|OID.1.2.643.100.5)="] = "1.2.643.100.5=",
+                ["^(ИНН|INN|OID.1.2.643.3.131.1.1)="] = "1.2.643.3.131.1.1=",
+                ["^(E|Е|OID.1.2.840.113549.1.9.1)="] = "1.2.840.113549.1.9.1=",
+                ["^S="] = "ST=",
+                ["\\\""] = string.Empty,
+                [". "] = ".",
+            };
+            RegexpToReplace = regexps.ToDictionary(x => new Regex(x.Key), x => x.Value);
+        }
+
+        private static IEnumerable<string> ParseIssuer(string issuer)
+        {
+            return Tokenize(issuer).Select(ReplaceOids);
+        }
+
+        private static string ReplaceOids(string oidString)
+        {
+            foreach (var item in RegexpToReplace)
+            {
+                oidString = item.Key.Replace(oidString, item.Value);
+            }
+            return oidString;
+        }
+
+        private static IEnumerable<string> Tokenize(string issuer)
+        {
+            var tokenizer = new X509NameTokenizer(issuer);
+            while (tokenizer.HasMoreTokens())
+            {
+                yield return tokenizer.NextToken();
+            }
+        }
+
+        private static readonly Dictionary<Regex, string> RegexpToReplace;
+
+        public bool AreSameIssuer(string first, string second)
+        {
+            var firstTokens = ParseIssuer(first);
+            var secondTokens = ParseIssuer(second);
+            return EnumerableHelper.AreSequenceEquals(firstTokens, secondTokens);
+        }
+    }
+}