Initial checkin1.5.6

1 files changed, 182 insertions, 0 deletions

diff --git a/src/asn1_alt.cpp b/src/asn1_alt.cpp
new file mode 100644
index 000000000..930f9d3a9
--- /dev/null
+++ b/src/asn1_alt.cpp
@@ -0,0 +1,182 @@
+/*************************************************
+* AlternativeName Source File                    *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/asn1_obj.h>
+#include <botan/stl_util.h>
+#include <botan/charset.h>
+
+namespace Botan {
+
+/*************************************************
+* Create an AlternativeName                      *
+*************************************************/
+AlternativeName::AlternativeName(const std::string& email_addr,
+                                 const std::string& uri,
+                                 const std::string& dns)
+   {
+   add_attribute("RFC822", email_addr);
+   add_attribute("DNS", dns);
+   add_attribute("URI", uri);
+   }
+
+/*************************************************
+* Add an attribute to an alternative name        *
+*************************************************/
+void AlternativeName::add_attribute(const std::string& type,
+                                    const std::string& str)
+   {
+   if(type == "" || str == "")
+      return;
+
+   typedef std::multimap<std::string, std::string>::iterator iter;
+   std::pair<iter, iter> range = alt_info.equal_range(type);
+   for(iter j = range.first; j != range.second; ++j)
+      if(j->second == str)
+         return;
+
+   multimap_insert(alt_info, type, str);
+   }
+
+/*************************************************
+* Add an OtherName field                         *
+*************************************************/
+void AlternativeName::add_othername(const OID& oid, const std::string& value,
+                                    ASN1_Tag type)
+   {
+   if(value == "")
+      return;
+   multimap_insert(othernames, oid, ASN1_String(value, type));
+   }
+
+/*************************************************
+* Get the attributes of this alternative name    *
+*************************************************/
+std::multimap<std::string, std::string> AlternativeName::get_attributes() const
+   {
+   return alt_info;
+   }
+
+/*************************************************
+* Get the otherNames                             *
+*************************************************/
+std::multimap<OID, ASN1_String> AlternativeName::get_othernames() const
+   {
+   return othernames;
+   }
+
+/*************************************************
+* Return if this object has anything useful      *
+*************************************************/
+bool AlternativeName::has_items() const
+   {
+   return (alt_info.size() > 0 || othernames.size() > 0);
+   }
+
+namespace {
+
+/*************************************************
+* DER encode an AlternativeName entry            *
+*************************************************/
+void encode_entries(DER_Encoder& encoder,
+                    const std::multimap<std::string, std::string>& attr,
+                    const std::string& type, ASN1_Tag tagging)
+   {
+   typedef std::multimap<std::string, std::string>::const_iterator iter;
+
+   std::pair<iter, iter> range = attr.equal_range(type);
+   for(iter j = range.first; j != range.second; ++j)
+      {
+      ASN1_String asn1_string(j->second, IA5_STRING);
+      DER::encode(encoder, asn1_string, tagging, CONTEXT_SPECIFIC);
+      }
+   }
+
+}
+
+/*************************************************
+* DER encode an AlternativeName extension        *
+*************************************************/
+void AlternativeName::encode_into(DER_Encoder& der) const
+   {
+   der.start_sequence();
+
+   encode_entries(der, alt_info, "RFC822", ASN1_Tag(1));
+   encode_entries(der, alt_info, "DNS", ASN1_Tag(2));
+   encode_entries(der, alt_info, "URI", ASN1_Tag(6));
+
+   std::multimap<OID, ASN1_String>::const_iterator i;
+   for(i = othernames.begin(); i != othernames.end(); ++i)
+      {
+      der.start_explicit(ASN1_Tag(0))
+         .encode(i->first)
+         .start_explicit(ASN1_Tag(0))
+            .encode(i->second)
+         .end_explicit(ASN1_Tag(0))
+      .end_explicit(ASN1_Tag(0));
+      }
+
+   der.end_sequence();
+   }
+
+namespace BER {
+
+/*************************************************
+* Decode a BER encoded AlternativeName           *
+*************************************************/
+void decode(BER_Decoder& source, AlternativeName& alt_name)
+   {
+   BER_Decoder names = BER::get_subsequence(source);
+   while(names.more_items())
+      {
+      BER_Object obj = names.get_next_object();
+      if((obj.class_tag != CONTEXT_SPECIFIC) &&
+         (obj.class_tag != (CONTEXT_SPECIFIC | CONSTRUCTED)))
+         continue;
+
+      ASN1_Tag tag = obj.type_tag;
+
+      if(tag == 0)
+         {
+         BER_Decoder othername(obj.value);
+
+         OID oid;
+         BER::decode(othername, oid);
+         if(othername.more_items())
+            {
+            BER_Object othername_value_outer = othername.get_next_object();
+            othername.verify_end();
+
+            if(othername_value_outer.type_tag != ASN1_Tag(0) ||
+               othername_value_outer.class_tag !=
+                   (CONTEXT_SPECIFIC | CONSTRUCTED)
+               )
+               throw Decoding_Error("Invalid tags on otherName value");
+
+            BER_Decoder othername_value_inner(othername_value_outer.value);
+
+            BER_Object value = othername_value_inner.get_next_object();
+            othername_value_inner.verify_end();
+
+            ASN1_Tag value_type = value.type_tag;
+
+            if(is_string_type(value_type) && value.class_tag == UNIVERSAL)
+               alt_name.add_othername(oid, BER::to_string(value), value_type);
+            }
+         }
+      else if(tag == 1 || tag == 2 || tag == 6)
+         {
+         const std::string value = iso2local(BER::to_string(obj));
+
+         if(tag == 1) alt_name.add_attribute("RFC822", value);
+         if(tag == 2) alt_name.add_attribute("DNS", value);
+         if(tag == 6) alt_name.add_attribute("URI", value);
+         }
+
+      }
+   }
+
+}
+
+}