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/*
* Simple ASN.1 String Types
* (C) 2007 FlexSecure GmbH
* 2008-2011 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/eac_asn_obj.h>
#include <botan/der_enc.h>
#include <botan/ber_dec.h>
#include <botan/charset.h>
#include <botan/parsing.h>
#include <sstream>
#include <ios>
namespace Botan {
/*
* Create an ASN1_EAC_String
*/
ASN1_EAC_String::ASN1_EAC_String(const std::string& str, ASN1_Tag t) : tag(t)
{
iso_8859_str = Charset::transcode(str, LOCAL_CHARSET, LATIN1_CHARSET);
if(!sanity_check())
throw Invalid_Argument("ASN1_EAC_String contains illegal characters");
}
/*
* Return this string in ISO 8859-1 encoding
*/
std::string ASN1_EAC_String::iso_8859() const
{
return iso_8859_str;
}
/*
* Return this string in local encoding
*/
std::string ASN1_EAC_String::value() const
{
return Charset::transcode(iso_8859_str, LATIN1_CHARSET, LOCAL_CHARSET);
}
/*
* Return the type of this string object
*/
ASN1_Tag ASN1_EAC_String::tagging() const
{
return tag;
}
/*
* DER encode an ASN1_EAC_String
*/
void ASN1_EAC_String::encode_into(DER_Encoder& encoder) const
{
std::string value = iso_8859();
encoder.add_object(tagging(), APPLICATION, value);
}
/*
* Decode a BER encoded ASN1_EAC_String
*/
void ASN1_EAC_String::decode_from(BER_Decoder& source)
{
BER_Object obj = source.get_next_object();
if(obj.type_tag != this->tag)
{
std::stringstream ss;
ss << "ASN1_EAC_String tag mismatch, tag was "
<< std::hex << obj.type_tag
<< " expected "
<< std::hex << this->tag;
throw Decoding_Error(ss.str());
}
Character_Set charset_is;
charset_is = LATIN1_CHARSET;
try
{
*this = ASN1_EAC_String(
Charset::transcode(ASN1::to_string(obj), charset_is, LOCAL_CHARSET),
obj.type_tag);
}
catch(Invalid_Argument& inv_arg)
{
throw Decoding_Error(std::string("ASN1_EAC_String decoding failed: ") +
inv_arg.what());
}
}
// checks for compliance to the alphabet defined in TR-03110 v1.10, 2007-08-20
// p. 43
bool ASN1_EAC_String::sanity_check() const
{
const byte* rep = reinterpret_cast<const byte*>(iso_8859_str.data());
const size_t rep_len = iso_8859_str.size();
for(size_t i = 0; i != rep_len; ++i)
{
if((rep[i] < 0x20) || ((rep[i] >= 0x7F) && (rep[i] < 0xA0)))
return false;
}
return true;
}
bool operator==(const ASN1_EAC_String& lhs, const ASN1_EAC_String& rhs)
{
return (lhs.iso_8859() == rhs.iso_8859());
}
ASN1_Car::ASN1_Car(std::string const& str)
: ASN1_EAC_String(str, ASN1_Tag(2))
{}
ASN1_Chr::ASN1_Chr(std::string const& str)
: ASN1_EAC_String(str, ASN1_Tag(32))
{}
}
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