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/*
* Common ASN.1 Objects
* (C) 1999-2007 Jack Lloyd
*     2007 Yves Jerschow
*
* Distributed under the terms of the Botan license
*/

#ifndef BOTAN_ASN1_OBJ_H__
#define BOTAN_ASN1_OBJ_H__

#include <botan/asn1_int.h>
#include <botan/asn1_oid.h>
#include <botan/alg_id.h>
#include <vector>
#include <map>

namespace Botan {

/**
* Attribute
*/
class BOTAN_DLL Attribute : public ASN1_Object
   {
   public:
      void encode_into(class DER_Encoder& to) const;
      void decode_from(class BER_Decoder& from);

      OID oid;
      MemoryVector<byte> parameters;

      Attribute() {}
      Attribute(const OID&, const MemoryRegion<byte>&);
      Attribute(const std::string&, const MemoryRegion<byte>&);
   };

/**
* X.509 Time
*/
class BOTAN_DLL X509_Time : public ASN1_Object
   {
   public:
      void encode_into(class DER_Encoder&) const;
      void decode_from(class BER_Decoder&);

      std::string as_string() const;
      std::string readable_string() const;
      bool time_is_set() const;

      s32bit cmp(const X509_Time&) const;

      void set_to(const std::string&);
      void set_to(const std::string&, ASN1_Tag);

      X509_Time(u64bit);
      X509_Time(const std::string& = "");
      X509_Time(const std::string&, ASN1_Tag);
   private:
      bool passes_sanity_check() const;
      u32bit year, month, day, hour, minute, second;
      ASN1_Tag tag;
   };

/**
* Simple String
*/
class BOTAN_DLL ASN1_String : public ASN1_Object
   {
   public:
      void encode_into(class DER_Encoder&) const;
      void decode_from(class BER_Decoder&);

      std::string value() const;
      std::string iso_8859() const;

      ASN1_Tag tagging() const;

      ASN1_String(const std::string& = "");
      ASN1_String(const std::string&, ASN1_Tag);
   private:
      std::string iso_8859_str;
      ASN1_Tag tag;
   };

/**
* Distinguished Name
*/
class BOTAN_DLL X509_DN : public ASN1_Object
   {
   public:
      void encode_into(class DER_Encoder&) const;
      void decode_from(class BER_Decoder&);

      std::multimap<OID, std::string> get_attributes() const;
      std::vector<std::string> get_attribute(const std::string&) const;

      std::multimap<std::string, std::string> contents() const;

      void add_attribute(const std::string&, const std::string&);
      void add_attribute(const OID&, const std::string&);

      static std::string deref_info_field(const std::string&);

      void do_decode(const MemoryRegion<byte>&);
      MemoryVector<byte> get_bits() const;

      X509_DN();
      X509_DN(const std::multimap<OID, std::string>&);
      X509_DN(const std::multimap<std::string, std::string>&);
   private:
      std::multimap<OID, ASN1_String> dn_info;
      MemoryVector<byte> dn_bits;
   };

/**
* Alternative Name
*/
class BOTAN_DLL AlternativeName : public ASN1_Object
   {
   public:
      void encode_into(class DER_Encoder&) const;
      void decode_from(class BER_Decoder&);

      std::multimap<std::string, std::string> contents() const;

      void add_attribute(const std::string&, const std::string&);
      std::multimap<std::string, std::string> get_attributes() const;

      void add_othername(const OID&, const std::string&, ASN1_Tag);
      std::multimap<OID, ASN1_String> get_othernames() const;

      bool has_items() const;

      AlternativeName(const std::string& = "", const std::string& = "",
                      const std::string& = "", const std::string& = "");
   private:
      std::multimap<std::string, std::string> alt_info;
      std::multimap<OID, ASN1_String> othernames;
   };

/*
* Comparison Operations
*/
bool BOTAN_DLL operator==(const X509_Time&, const X509_Time&);
bool BOTAN_DLL operator!=(const X509_Time&, const X509_Time&);
bool BOTAN_DLL operator<=(const X509_Time&, const X509_Time&);
bool BOTAN_DLL operator>=(const X509_Time&, const X509_Time&);

bool BOTAN_DLL operator==(const X509_DN&, const X509_DN&);
bool BOTAN_DLL operator!=(const X509_DN&, const X509_DN&);
bool BOTAN_DLL operator<(const X509_DN&, const X509_DN&);

/*
* Helper Functions
*/
bool BOTAN_DLL is_string_type(ASN1_Tag);

}

#endif