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/*
* Simple ASN.1 String Types
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/asn1_str.h>
#include <botan/der_enc.h>
#include <botan/ber_dec.h>
#include <botan/charset.h>
namespace Botan {
namespace {
/*
* Choose an encoding for the string
*/
ASN1_Tag choose_encoding(const std::string& str)
{
static const uint8_t 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<uint8_t>(str[i])])
{
return UTF8_STRING;
}
}
return PRINTABLE_STRING;
}
void assert_is_string_type(ASN1_Tag tag)
{
if(!ASN1_String::is_string_type(tag))
{
throw Invalid_Argument("ASN1_String: Unknown string type " +
std::to_string(tag));
}
}
}
//static
bool ASN1_String::is_string_type(ASN1_Tag tag)
{
return (tag == NUMERIC_STRING ||
tag == PRINTABLE_STRING ||
tag == VISIBLE_STRING ||
tag == T61_STRING ||
tag == IA5_STRING ||
tag == UTF8_STRING ||
tag == BMP_STRING ||
tag == UNIVERSAL_STRING);
}
/*
* Create an ASN1_String
*/
ASN1_String::ASN1_String(const std::string& str, ASN1_Tag t) : m_utf8_str(str), m_tag(t)
{
if(m_tag == DIRECTORY_STRING)
{
m_tag = choose_encoding(m_utf8_str);
}
assert_is_string_type(m_tag);
}
/*
* Create an ASN1_String
*/
ASN1_String::ASN1_String(const std::string& str) :
m_utf8_str(str),
m_tag(choose_encoding(m_utf8_str))
{}
/*
* Return this string in ISO 8859-1 encoding
*/
std::string ASN1_String::iso_8859() const
{
return utf8_to_latin1(m_utf8_str);
}
/*
* DER encode an ASN1_String
*/
void ASN1_String::encode_into(DER_Encoder& encoder) const
{
if(m_data.empty())
{
encoder.add_object(tagging(), UNIVERSAL, m_utf8_str);
}
else
{
// If this string was decoded, reserialize using original encoding
encoder.add_object(tagging(), UNIVERSAL, m_data.data(), m_data.size());
}
}
/*
* Decode a BER encoded ASN1_String
*/
void ASN1_String::decode_from(BER_Decoder& source)
{
BER_Object obj = source.get_next_object();
assert_is_string_type(obj.type_tag);
m_tag = obj.type_tag;
m_data.assign(obj.value.begin(), obj.value.end());
if(m_tag == BMP_STRING)
{
m_utf8_str = ucs2_to_utf8(m_data.data(), m_data.size());
}
else if(m_tag == UNIVERSAL_STRING)
{
m_utf8_str = ucs4_to_utf8(m_data.data(), m_data.size());
}
else
{
// All other supported string types are UTF-8 or some subset thereof
m_utf8_str = ASN1::to_string(obj);
}
}
}
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