X500Name.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / security / system / security / cryptography / x509 / X500Name.cs / 1 / X500Name.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 

// 
// X500Name.cs 
//
// 07/10/2003 
//

namespace System.Security.Cryptography.X509Certificates {
    using System.Globalization; 
    using System.Runtime.InteropServices;
    using System.Security.Cryptography; 
 
    [Flags]
    public enum X500DistinguishedNameFlags { 
        None                = 0x0000,
        Reversed            = 0x0001,

        UseSemicolons       = 0x0010, 
        DoNotUsePlusSign    = 0x0020,
        DoNotUseQuotes      = 0x0040, 
        UseCommas           = 0x0080, 
        UseNewLines         = 0x0100,
 
        UseUTF8Encoding     = 0x1000,
        UseT61Encoding      = 0x2000,
        ForceUTF8Encoding   = 0x4000,
    } 

    public sealed class X500DistinguishedName : AsnEncodedData { 
        private string m_distinguishedName = null; 

        // 
        // Constructors.
        //

        internal X500DistinguishedName (CAPI.CRYPTOAPI_BLOB encodedDistinguishedNameBlob) : base (new Oid(), encodedDistinguishedNameBlob) {} 

        public X500DistinguishedName (byte[] encodedDistinguishedName) : base(new Oid(), encodedDistinguishedName) {} 
 
        public X500DistinguishedName (AsnEncodedData encodedDistinguishedName) : base(encodedDistinguishedName) {}
 
        public X500DistinguishedName (X500DistinguishedName distinguishedName) : base((AsnEncodedData) distinguishedName) {
            m_distinguishedName = distinguishedName.Name;
        }
 
        public X500DistinguishedName (string distinguishedName) : this(distinguishedName, X500DistinguishedNameFlags.Reversed) {}
 
        public X500DistinguishedName (string distinguishedName, X500DistinguishedNameFlags flag) : base(new Oid(), Encode(distinguishedName, flag)) { 
            m_distinguishedName = distinguishedName;
        } 

        //
        // Public properties.
        // 

        public string Name { 
            get { 
                if (m_distinguishedName == null)
                    m_distinguishedName = Decode(X500DistinguishedNameFlags.Reversed); 
                return m_distinguishedName;
            }
        }
 
        //
        // Public methods. 
        // 

        public string Decode (X500DistinguishedNameFlags flag) { 
            uint dwStrType = CAPI.CERT_X500_NAME_STR | MapNameToStrFlag(flag);
            unsafe {
                byte[] encodedDistinguishedName = this.m_rawData;
                fixed (byte * pbEncoded = encodedDistinguishedName) { 
                    CAPI.CRYPTOAPI_BLOB nameBlob;
                    IntPtr pNameBlob = new IntPtr(&nameBlob); 
                    nameBlob.cbData = (uint) encodedDistinguishedName.Length; 
                    nameBlob.pbData = new IntPtr(pbEncoded);
 
                    uint cchDecoded = CAPI.CertNameToStrW(CAPI.X509_ASN_ENCODING | CAPI.PKCS_7_ASN_ENCODING,
                                                          pNameBlob,
                                                          dwStrType,
                                                          SafeLocalAllocHandle.InvalidHandle, 
                                                          0);
                    if (cchDecoded == 0) 
                        throw new CryptographicException(CAPI.CERT_E_INVALID_NAME); 

                    using (SafeLocalAllocHandle pwszDecodeName = CAPI.LocalAlloc(CAPI.LPTR, new IntPtr(2 * cchDecoded))) { 
                        if (CAPI.CertNameToStrW(CAPI.X509_ASN_ENCODING | CAPI.PKCS_7_ASN_ENCODING,
                                                pNameBlob,
                                                dwStrType,
                                                pwszDecodeName, 
                                                cchDecoded) == 0)
                            throw new CryptographicException(CAPI.CERT_E_INVALID_NAME); 
                        return Marshal.PtrToStringUni(pwszDecodeName.DangerousGetHandle()); 
                    }
                } 
            }
        }

        public override string Format (bool multiLine) { 
            //
            // We must override to use the "numeric" pointer version of 
            // CryptFormatObject, since X509 DN does not have an official OID. 
            //
 
            // Return empty string if no data to format.
            if (m_rawData == null || m_rawData.Length == 0)
                return String.Empty;
 
            return CAPI.CryptFormatObject(CAPI.X509_ASN_ENCODING,
                                          multiLine ? CAPI.CRYPT_FORMAT_STR_MULTI_LINE : 0, 
                                          new IntPtr(CAPI.X509_NAME), 
                                          m_rawData);
        } 

        //
        // Private methods.
        // 

        private unsafe static byte[] Encode (string distinguishedName, X500DistinguishedNameFlags flag) { 
            if (distinguishedName == null) 
                throw new ArgumentNullException("distinguishedName");
 
            uint cbEncoded = 0;
            uint dwStrType = CAPI.CERT_X500_NAME_STR | MapNameToStrFlag(flag);

            if (!CAPI.CertStrToNameW(CAPI.X509_ASN_ENCODING | CAPI.PKCS_7_ASN_ENCODING, 
                                     distinguishedName,
                                     dwStrType, 
                                     IntPtr.Zero, 
                                     IntPtr.Zero,
                                     ref cbEncoded, 
                                     IntPtr.Zero))
                throw new CryptographicException(Marshal.GetLastWin32Error());

            byte[] encodedName = new byte[cbEncoded]; 
            fixed (byte * pbEncoded = encodedName) {
                if (!CAPI.CertStrToNameW(CAPI.X509_ASN_ENCODING | CAPI.PKCS_7_ASN_ENCODING, 
                                        distinguishedName, 
                                        dwStrType,
                                        IntPtr.Zero, 
                                        new IntPtr(pbEncoded),
                                        ref cbEncoded,
                                        IntPtr.Zero))
                    throw new CryptographicException(Marshal.GetLastWin32Error()); 
            }
 
            return encodedName; 
        }
 
        private static uint MapNameToStrFlag (X500DistinguishedNameFlags flag) {
            // All values or'ed together. Change this if you add values to the enumeration.
            uint allFlags = 0x71F1;
            uint dwFlags = (uint) flag; 
            if ((dwFlags & ~allFlags) != 0)
                throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.Arg_EnumIllegalVal), "flag")); 
 
            uint dwStrType = 0;
            if (dwFlags != 0) { 
                if ((flag & X500DistinguishedNameFlags.Reversed) == X500DistinguishedNameFlags.Reversed)
                    dwStrType |= CAPI.CERT_NAME_STR_REVERSE_FLAG;

                if ((flag & X500DistinguishedNameFlags.UseSemicolons) == X500DistinguishedNameFlags.UseSemicolons) 
                    dwStrType |= CAPI.CERT_NAME_STR_SEMICOLON_FLAG;
                else if ((flag & X500DistinguishedNameFlags.UseCommas) == X500DistinguishedNameFlags.UseCommas) 
                    dwStrType |= CAPI.CERT_NAME_STR_COMMA_FLAG; 
                else if ((flag & X500DistinguishedNameFlags.UseNewLines) == X500DistinguishedNameFlags.UseNewLines)
                    dwStrType |= CAPI.CERT_NAME_STR_CRLF_FLAG; 

                if ((flag & X500DistinguishedNameFlags.DoNotUsePlusSign) == X500DistinguishedNameFlags.DoNotUsePlusSign)
                    dwStrType |= CAPI.CERT_NAME_STR_NO_PLUS_FLAG;
                if ((flag & X500DistinguishedNameFlags.DoNotUseQuotes) == X500DistinguishedNameFlags.DoNotUseQuotes) 
                    dwStrType |= CAPI.CERT_NAME_STR_NO_QUOTING_FLAG;
 
                if ((flag & X500DistinguishedNameFlags.ForceUTF8Encoding) == X500DistinguishedNameFlags.ForceUTF8Encoding) 
                    dwStrType |= CAPI.CERT_NAME_STR_FORCE_UTF8_DIR_STR_FLAG;
 
                if ((flag & X500DistinguishedNameFlags.UseUTF8Encoding) == X500DistinguishedNameFlags.UseUTF8Encoding)
                    dwStrType |= CAPI.CERT_NAME_STR_ENABLE_UTF8_UNICODE_FLAG;
                else if ((flag & X500DistinguishedNameFlags.UseT61Encoding) == X500DistinguishedNameFlags.UseT61Encoding)
                    dwStrType |= CAPI.CERT_NAME_STR_ENABLE_T61_UNICODE_FLAG; 
            }
            return dwStrType; 
        } 
    }
}

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