1 files changed, 304 insertions, 0 deletions
diff --git a/src/asn1/x509_dn.cpp b/src/asn1/x509_dn.cpp
new file mode 100644
index 000000000..0a4760391
--- /dev/null
+++ b/src/asn1/x509_dn.cpp
@@ -0,0 +1,304 @@
+/*
+* X509_DN
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/x509_dn.h>
+#include <botan/der_enc.h>
+#include <botan/ber_dec.h>
+#include <botan/parsing.h>
+#include <botan/internal/stl_util.h>
+#include <botan/oids.h>
+
+namespace Botan {
+
+/*
+* Create an empty X509_DN
+*/
+X509_DN::X509_DN()
+   {
+   }
+
+/*
+* Create an X509_DN
+*/
+X509_DN::X509_DN(const std::multimap<OID, std::string>& args)
+   {
+   std::multimap<OID, std::string>::const_iterator j;
+   for(j = args.begin(); j != args.end(); ++j)
+      add_attribute(j->first, j->second);
+   }
+
+/*
+* Create an X509_DN
+*/
+X509_DN::X509_DN(const std::multimap<std::string, std::string>& args)
+   {
+   std::multimap<std::string, std::string>::const_iterator j;
+   for(j = args.begin(); j != args.end(); ++j)
+      add_attribute(OIDS::lookup(j->first), j->second);
+   }
+
+/*
+* Add an attribute to a X509_DN
+*/
+void X509_DN::add_attribute(const std::string& type,
+                            const std::string& str)
+   {
+   OID oid = OIDS::lookup(type);
+   add_attribute(oid, str);
+   }
+
+/*
+* Add an attribute to a X509_DN
+*/
+void X509_DN::add_attribute(const OID& oid, const std::string& str)
+   {
+   if(str == "")
+      return;
+
+   typedef std::multimap<OID, ASN1_String>::iterator rdn_iter;
+
+   std::pair<rdn_iter, rdn_iter> range = dn_info.equal_range(oid);
+   for(rdn_iter j = range.first; j != range.second; ++j)
+      if(j->second.value() == str)
+         return;
+
+   multimap_insert(dn_info, oid, ASN1_String(str));
+   dn_bits.clear();
+   }
+
+/*
+* Get the attributes of this X509_DN
+*/
+std::multimap<OID, std::string> X509_DN::get_attributes() const
+   {
+   typedef std::multimap<OID, ASN1_String>::const_iterator rdn_iter;
+
+   std::multimap<OID, std::string> retval;
+   for(rdn_iter j = dn_info.begin(); j != dn_info.end(); ++j)
+      multimap_insert(retval, j->first, j->second.value());
+   return retval;
+   }
+
+/*
+* Get the contents of this X.500 Name
+*/
+std::multimap<std::string, std::string> X509_DN::contents() const
+   {
+   typedef std::multimap<OID, ASN1_String>::const_iterator rdn_iter;
+
+   std::multimap<std::string, std::string> retval;
+   for(rdn_iter j = dn_info.begin(); j != dn_info.end(); ++j)
+      multimap_insert(retval, OIDS::lookup(j->first), j->second.value());
+   return retval;
+   }
+
+/*
+* Get a single attribute type
+*/
+std::vector<std::string> X509_DN::get_attribute(const std::string& attr) const
+   {
+   typedef std::multimap<OID, ASN1_String>::const_iterator rdn_iter;
+
+   const OID oid = OIDS::lookup(deref_info_field(attr));
+   std::pair<rdn_iter, rdn_iter> range = dn_info.equal_range(oid);
+
+   std::vector<std::string> values;
+   for(rdn_iter j = range.first; j != range.second; ++j)
+      values.push_back(j->second.value());
+   return values;
+   }
+
+/*
+* Handle the decoding operation of a DN
+*/
+void X509_DN::do_decode(const MemoryRegion<byte>& bits)
+   {
+   BER_Decoder sequence(bits);
+
+   while(sequence.more_items())
+      {
+      BER_Decoder rdn = sequence.start_cons(SET);
+
+      while(rdn.more_items())
+         {
+         OID oid;
+         ASN1_String str;
+
+         rdn.start_cons(SEQUENCE)
+            .decode(oid)
+            .decode(str)
+            .verify_end()
+        .end_cons();
+
+         add_attribute(oid, str.value());
+         }
+      }
+
+   dn_bits = bits;
+   }
+
+/*
+* Return the BER encoded data, if any
+*/
+MemoryVector<byte> X509_DN::get_bits() const
+   {
+   return dn_bits;
+   }
+
+/*
+* Deref aliases in a subject/issuer info request
+*/
+std::string X509_DN::deref_info_field(const std::string& info)
+   {
+   if(info == "Name" || info == "CommonName") return "X520.CommonName";
+   if(info == "SerialNumber")                 return "X520.SerialNumber";
+   if(info == "Country")                      return "X520.Country";
+   if(info == "Organization")                 return "X520.Organization";
+   if(info == "Organizational Unit" || info == "OrgUnit")
+      return "X520.OrganizationalUnit";
+   if(info == "Locality")                     return "X520.Locality";
+   if(info == "State" || info == "Province")  return "X520.State";
+   if(info == "Email")                        return "RFC822";
+   return info;
+   }
+
+/*
+* Compare two X509_DNs for equality
+*/
+bool operator==(const X509_DN& dn1, const X509_DN& dn2)
+   {
+   typedef std::multimap<OID, std::string>::const_iterator rdn_iter;
+
+   std::multimap<OID, std::string> attr1 = dn1.get_attributes();
+   std::multimap<OID, std::string> attr2 = dn2.get_attributes();
+
+   if(attr1.size() != attr2.size()) return false;
+
+   rdn_iter p1 = attr1.begin();
+   rdn_iter p2 = attr2.begin();
+
+   while(true)
+      {
+      if(p1 == attr1.end() && p2 == attr2.end())
+         break;
+      if(p1 == attr1.end())      return false;
+      if(p2 == attr2.end())      return false;
+      if(p1->first != p2->first) return false;
+      if(!x500_name_cmp(p1->second, p2->second))
+         return false;
+      ++p1;
+      ++p2;
+      }
+   return true;
+   }
+
+/*
+* Compare two X509_DNs for inequality
+*/
+bool operator!=(const X509_DN& dn1, const X509_DN& dn2)
+   {
+   return !(dn1 == dn2);
+   }
+
+/*
+* Compare two X509_DNs
+*/
+bool operator<(const X509_DN& dn1, const X509_DN& dn2)
+   {
+   typedef std::multimap<OID, std::string>::const_iterator rdn_iter;
+
+   std::multimap<OID, std::string> attr1 = dn1.get_attributes();
+   std::multimap<OID, std::string> attr2 = dn2.get_attributes();
+
+   if(attr1.size() < attr2.size()) return true;
+   if(attr1.size() > attr2.size()) return false;
+
+   for(rdn_iter p1 = attr1.begin(); p1 != attr1.end(); ++p1)
+      {
+      std::multimap<OID, std::string>::const_iterator p2;
+      p2 = attr2.find(p1->first);
+      if(p2 == attr2.end())       return false;
+      if(p1->second > p2->second) return false;
+      if(p1->second < p2->second) return true;
+      }
+   return false;
+   }
+
+namespace {
+
+/*
+* DER encode a RelativeDistinguishedName
+*/
+void do_ava(DER_Encoder& encoder,
+            const std::multimap<OID, std::string>& dn_info,
+            ASN1_Tag string_type, const std::string& oid_str,
+            bool must_exist = false)
+   {
+   typedef std::multimap<OID, std::string>::const_iterator rdn_iter;
+
+   const OID oid = OIDS::lookup(oid_str);
+   const bool exists = (dn_info.find(oid) != dn_info.end());
+
+   if(!exists && must_exist)
+      throw Encoding_Error("X509_DN: No entry for " + oid_str);
+   if(!exists) return;
+
+   std::pair<rdn_iter, rdn_iter> range = dn_info.equal_range(oid);
+
+   for(rdn_iter j = range.first; j != range.second; ++j)
+      {
+      encoder.start_cons(SET)
+         .start_cons(SEQUENCE)
+            .encode(oid)
+            .encode(ASN1_String(j->second, string_type))
+         .end_cons()
+      .end_cons();
+      }
+   }
+
+}
+
+/*
+* DER encode a DistinguishedName
+*/
+void X509_DN::encode_into(DER_Encoder& der) const
+   {
+   std::multimap<OID, std::string> dn_info = get_attributes();
+
+   der.start_cons(SEQUENCE);
+
+   if(!dn_bits.empty())
+      der.raw_bytes(dn_bits);
+   else
+      {
+      do_ava(der, dn_info, PRINTABLE_STRING, "X520.Country", true);
+      do_ava(der, dn_info, DIRECTORY_STRING, "X520.State");
+      do_ava(der, dn_info, DIRECTORY_STRING, "X520.Locality");
+      do_ava(der, dn_info, DIRECTORY_STRING, "X520.Organization");
+      do_ava(der, dn_info, DIRECTORY_STRING, "X520.OrganizationalUnit");
+      do_ava(der, dn_info, DIRECTORY_STRING, "X520.CommonName", true);
+      do_ava(der, dn_info, PRINTABLE_STRING, "X520.SerialNumber");
+      }
+
+   der.end_cons();
+   }
+
+/*
+* Decode a BER encoded DistinguishedName
+*/
+void X509_DN::decode_from(BER_Decoder& source)
+   {
+   dn_info.clear();
+
+   source.start_cons(SEQUENCE)
+      .raw_bytes(dn_bits)
+   .end_cons();
+
+   do_decode(dn_bits);
+   }
+
+}