1 files changed, 148 insertions, 0 deletions
diff --git a/lib/asn1/asn1_str.cpp b/lib/asn1/asn1_str.cpp
new file mode 100644
index 000000000..44db189f9
--- /dev/null
+++ b/lib/asn1/asn1_str.cpp
@@ -0,0 +1,148 @@
+/*
+* Simple ASN.1 String Types
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/asn1_str.h>
+#include <botan/der_enc.h>
+#include <botan/ber_dec.h>
+#include <botan/charset.h>
+#include <botan/parsing.h>
+
+namespace Botan {
+
+namespace {
+
+/*
+* Choose an encoding for the string
+*/
+ASN1_Tag choose_encoding(const std::string& str,
+                         const std::string& type)
+   {
+   static const byte IS_PRINTABLE[256] = {
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01,
+      0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00,
+      0x00, 0x01, 0x00, 0x01, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+      0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+      0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+      0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+      0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00 };
+
+   for(size_t i = 0; i != str.size(); ++i)
+      {
+      if(!IS_PRINTABLE[static_cast<byte>(str[i])])
+         {
+         if(type == "utf8")   return UTF8_STRING;
+         if(type == "latin1") return T61_STRING;
+         throw Invalid_Argument("choose_encoding: Bad string type " + type);
+         }
+      }
+   return PRINTABLE_STRING;
+   }
+
+}
+
+/*
+* Create an ASN1_String
+*/
+ASN1_String::ASN1_String(const std::string& str, ASN1_Tag t) : tag(t)
+   {
+   iso_8859_str = Charset::transcode(str, LOCAL_CHARSET, LATIN1_CHARSET);
+
+   if(tag == DIRECTORY_STRING)
+      tag = choose_encoding(iso_8859_str, "latin1");
+
+   if(tag != NUMERIC_STRING &&
+      tag != PRINTABLE_STRING &&
+      tag != VISIBLE_STRING &&
+      tag != T61_STRING &&
+      tag != IA5_STRING &&
+      tag != UTF8_STRING &&
+      tag != BMP_STRING)
+      throw Invalid_Argument("ASN1_String: Unknown string type " +
+                             std::to_string(tag));
+   }
+
+/*
+* Create an ASN1_String
+*/
+ASN1_String::ASN1_String(const std::string& str)
+   {
+   iso_8859_str = Charset::transcode(str, LOCAL_CHARSET, LATIN1_CHARSET);
+   tag = choose_encoding(iso_8859_str, "latin1");
+   }
+
+/*
+* Return this string in ISO 8859-1 encoding
+*/
+std::string ASN1_String::iso_8859() const
+   {
+   return iso_8859_str;
+   }
+
+/*
+* Return this string in local encoding
+*/
+std::string ASN1_String::value() const
+   {
+   return Charset::transcode(iso_8859_str, LATIN1_CHARSET, LOCAL_CHARSET);
+   }
+
+/*
+* Return the type of this string object
+*/
+ASN1_Tag ASN1_String::tagging() const
+   {
+   return tag;
+   }
+
+/*
+* DER encode an ASN1_String
+*/
+void ASN1_String::encode_into(DER_Encoder& encoder) const
+   {
+   std::string value = iso_8859();
+   if(tagging() == UTF8_STRING)
+      value = Charset::transcode(value, LATIN1_CHARSET, UTF8_CHARSET);
+   encoder.add_object(tagging(), UNIVERSAL, value);
+   }
+
+/*
+* Decode a BER encoded ASN1_String
+*/
+void ASN1_String::decode_from(BER_Decoder& source)
+   {
+   BER_Object obj = source.get_next_object();
+
+   Character_Set charset_is;
+
+   if(obj.type_tag == BMP_STRING)
+      charset_is = UCS2_CHARSET;
+   else if(obj.type_tag == UTF8_STRING)
+      charset_is = UTF8_CHARSET;
+   else
+      charset_is = LATIN1_CHARSET;
+
+   *this = ASN1_String(
+      Charset::transcode(ASN1::to_string(obj), charset_is, LOCAL_CHARSET),
+      obj.type_tag);
+   }
+
+}