Move almost all of the ASN.1, BER, and DER codec related code into new

module asn1

Move hex and base64 codecs into new codecs directory. Also move zlib and
bzip2 to codecs from compress.

1 files changed, 226 insertions, 0 deletions

diff --git a/src/asn1/asn1_alt.cpp b/src/asn1/asn1_alt.cpp
new file mode 100644
index 000000000..035f918cb
--- /dev/null
+++ b/src/asn1/asn1_alt.cpp
@@ -0,0 +1,226 @@
+/*************************************************
+* AlternativeName Source File                    *
+* (C) 1999-2007 Jack Lloyd                       *
+*     2007 Yves Jerschow                         *
+*************************************************/
+
+#include <botan/asn1_obj.h>
+#include <botan/der_enc.h>
+#include <botan/ber_dec.h>
+#include <botan/oids.h>
+#include <botan/stl_util.h>
+#include <botan/charset.h>
+#include <botan/parsing.h>
+#include <botan/loadstor.h>
+
+namespace Botan {
+
+/*************************************************
+* Create an AlternativeName                      *
+*************************************************/
+AlternativeName::AlternativeName(const std::string& email_addr,
+                                 const std::string& uri,
+                                 const std::string& dns,
+                                 const std::string& ip)
+   {
+   add_attribute("RFC822", email_addr);
+   add_attribute("DNS", dns);
+   add_attribute("URI", uri);
+   add_attribute("IP", ip);
+   }
+
+/*************************************************
+* 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 all of the alternative names            *
+*************************************************/
+std::multimap<std::string, std::string> AlternativeName::contents() const
+   {
+   std::multimap<std::string, std::string> names;
+
+   typedef std::multimap<std::string, std::string>::const_iterator rdn_iter;
+   for(rdn_iter j = alt_info.begin(); j != alt_info.end(); ++j)
+      multimap_insert(names, j->first, j->second);
+
+   typedef std::multimap<OID, ASN1_String>::const_iterator on_iter;
+   for(on_iter j = othernames.begin(); j != othernames.end(); ++j)
+      multimap_insert(names, OIDS::lookup(j->first), j->second.value());
+
+   return names;
+   }
+
+/*************************************************
+* 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)
+      {
+      if(type == "RFC822" || type == "DNS" || type == "URI")
+         {
+         ASN1_String asn1_string(j->second, IA5_STRING);
+         encoder.add_object(tagging, CONTEXT_SPECIFIC, asn1_string.iso_8859());
+         }
+      else if(type == "IP")
+         {
+         u32bit ip = string_to_ipv4(j->second);
+         byte ip_buf[4] = { 0 };
+         store_be(ip, ip_buf);
+         encoder.add_object(tagging, CONTEXT_SPECIFIC, ip_buf, 4);
+         }
+      }
+   }
+
+}
+
+/*************************************************
+* DER encode an AlternativeName extension        *
+*************************************************/
+void AlternativeName::encode_into(DER_Encoder& der) const
+   {
+   der.start_cons(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));
+   encode_entries(der, alt_info, "IP", ASN1_Tag(7));
+
+   std::multimap<OID, ASN1_String>::const_iterator i;
+   for(i = othernames.begin(); i != othernames.end(); ++i)
+      {
+      der.start_explicit(0)
+         .encode(i->first)
+         .start_explicit(0)
+            .encode(i->second)
+         .end_explicit()
+      .end_explicit();
+      }
+
+   der.end_cons();
+   }
+
+/*************************************************
+* Decode a BER encoded AlternativeName           *
+*************************************************/
+void AlternativeName::decode_from(BER_Decoder& source)
+   {
+   BER_Decoder names = source.start_cons(SEQUENCE);
+
+   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;
+         othername.decode(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)
+               add_othername(oid, ASN1::to_string(value), value_type);
+            }
+         }
+      else if(tag == 1 || tag == 2 || tag == 6)
+         {
+         const std::string value = Charset::transcode(ASN1::to_string(obj),
+                                                      LATIN1_CHARSET,
+                                                      LOCAL_CHARSET);
+
+         if(tag == 1) add_attribute("RFC822", value);
+         if(tag == 2) add_attribute("DNS", value);
+         if(tag == 6) add_attribute("URI", value);
+         }
+      else if(tag == 7)
+         {
+         if(obj.value.size() == 4)
+            {
+            u32bit ip = load_be<u32bit>(obj.value.begin(), 0);
+            add_attribute("IP", ipv4_to_string(ip));
+            }
+         }
+
+      }
+   }
+
+}