CMS Enveloped Data Dumper.

CmsDumper.cs

using System;
using System.IO;
using System.Security.Cryptography.Pkcs;
using System.Security.Cryptography.Xml;

namespace CmsDumper
{
    class Program
    {
        static void Main(string[] args)
        {
            var cms = new EnvelopedCms();
            cms.Decode(File.ReadAllBytes(args[0]));

            Console.WriteLine("CMS Version:                    {0}", cms.Version);
            Console.WriteLine("CMS ContentType:                {0}", cms.ContentInfo.ContentType.FriendlyName);
            Console.WriteLine("CMS ContentEncryptionAlgorithm: {0}", cms.ContentEncryptionAlgorithm.Oid.FriendlyName);
            Console.WriteLine("CMS RecipientInfos:             {0}", cms.RecipientInfos.Count);
            foreach (var recipient in cms.RecipientInfos)
            {
                if (recipient.RecipientIdentifier.Type == SubjectIdentifierType.IssuerAndSerialNumber)
                {
                    var rid = (X509IssuerSerial) recipient.RecipientIdentifier.Value;
                    Console.WriteLine("\tCMS Recipient:");
                    Console.WriteLine("\t\tIssuer: {0}", rid.IssuerName);
                    Console.WriteLine("\t\tSerial: {0}", rid.SerialNumber);
                }
                else
                {
                    Console.WriteLine("\tCMS Recipient: {0}", recipient.RecipientIdentifier.Value);
                }                
            }            
        }        
    }
}