/*************************************************
* Parse a SCAN-style algorithm name *
*************************************************/
std::vector<std::string> parse_algorithm_name(const std::string& namex)
{
if(namex.find('(') == std::string::npos &&
namex.find(')') == std::string::npos)
return std::vector<std::string>(1, namex);
std::string name = namex, substring;
std::vector<std::string> elems;
u32bit level = 0;
elems.push_back(name.substr(0, name.find('(')));
name = name.substr(name.find('('));
for(std::string::const_iterator j = name.begin(); j != name.end(); ++j)
{
char c = *j;
if(c == '(')
++level;
if(c == ')')
{
if(level == 1 && j == name.end() - 1)
{
if(elems.size() == 1)
elems.push_back(substring.substr(1));
else
elems.push_back(substring);
return elems;
}
if(level == 0 || (level == 1 && j != name.end() - 1))
throw Invalid_Algorithm_Name(namex);
--level;
}
if(c == ',' && level == 1)
{
if(elems.size() == 1)
elems.push_back(substring.substr(1));
else
elems.push_back(substring);
substring.clear();
}
else
substring += c;
}
if(substring != "")
throw Invalid_Algorithm_Name(namex);
return elems;
}
/*
* Parse a SCAN-style algorithm name
*/
std::vector<std::string> parse_algorithm_name(const std::string& namex)
{
if(namex.find('(') == std::string::npos &&
namex.find(')') == std::string::npos)
return std::vector<std::string>(1, namex);
std::string name = namex, substring;
std::vector<std::string> elems;
size_t level = 0;
elems.push_back(name.substr(0, name.find('(')));
name = name.substr(name.find('('));
for(auto i = name.begin(); i != name.end(); ++i)
{
char c = *i;
if(c == '(')
++level;
if(c == ')')
{
if(level == 1 && i == name.end() - 1)
{
if(elems.size() == 1)
elems.push_back(substring.substr(1));
else
elems.push_back(substring);
return elems;
}
if(level == 0 || (level == 1 && i != name.end() - 1))
throw Invalid_Algorithm_Name(namex);
--level;
}
if(c == ',' && level == 1)
{
if(elems.size() == 1)
elems.push_back(substring.substr(1));
else
elems.push_back(substring);
substring.clear();
}
else
substring += c;
}
if(!substring.empty())
throw Invalid_Algorithm_Name(namex);
return elems;
}
/*
* See if the named compression algo is available
*/
bool CMS_Encoder::can_compress_with(const std::string& algo)
{
if(algo == "")
throw Invalid_Algorithm_Name("Empty string to can_compress_with");
#if defined(BOTAN_HAS_COMPRESSOR_ZLIB)
if(algo == "Zlib")
return true;
#endif
return false;
}