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/*
* (C) 2014,2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef EXAMPLE_CREDENTIALS_MANAGER_H_
#define EXAMPLE_CREDENTIALS_MANAGER_H_
#include <botan/pkcs8.h>
#include <botan/credentials_manager.h>
#include <botan/x509self.h>
#include <fstream>
#include <memory>
inline bool value_exists(const std::vector<std::string>& vec,
const std::string& val)
{
for(size_t i = 0; i != vec.size(); ++i)
{
if(vec[i] == val)
{
return true;
}
}
return false;
}
class Basic_Credentials_Manager : public Botan::Credentials_Manager
{
public:
Basic_Credentials_Manager()
{
load_certstores();
}
Basic_Credentials_Manager(Botan::RandomNumberGenerator& rng,
const std::string& server_crt,
const std::string& server_key)
{
Certificate_Info cert;
cert.key.reset(Botan::PKCS8::load_key(server_key, rng));
Botan::DataSource_Stream in(server_crt);
while(!in.end_of_data())
{
try
{
cert.certs.push_back(Botan::X509_Certificate(in));
}
catch(std::exception&)
{
}
}
// TODO: attempt to validate chain ourselves
m_creds.push_back(cert);
}
void load_certstores()
{
try
{
// TODO: make path configurable
const std::vector<std::string> paths = { "/etc/ssl/certs", "/usr/share/ca-certificates" };
for(auto const& path : paths)
{
std::shared_ptr<Botan::Certificate_Store> cs(new Botan::Certificate_Store_In_Memory(path));
m_certstores.push_back(cs);
}
}
catch(std::exception&)
{
}
}
std::vector<Botan::Certificate_Store*>
trusted_certificate_authorities(const std::string& type,
const std::string& /*hostname*/) override
{
std::vector<Botan::Certificate_Store*> v;
// don't ask for client certs
if(type == "tls-server")
{
return v;
}
for(auto const& cs : m_certstores)
{
v.push_back(cs.get());
}
return v;
}
std::vector<Botan::X509_Certificate> cert_chain(
const std::vector<std::string>& algos,
const std::string& type,
const std::string& hostname) override
{
BOTAN_UNUSED(type);
for(auto const& i : m_creds)
{
if(std::find(algos.begin(), algos.end(), i.key->algo_name()) == algos.end())
{
continue;
}
if(hostname != "" && !i.certs[0].matches_dns_name(hostname))
{
continue;
}
return i.certs;
}
return std::vector<Botan::X509_Certificate>();
}
Botan::Private_Key* private_key_for(const Botan::X509_Certificate& cert,
const std::string& /*type*/,
const std::string& /*context*/) override
{
for(auto const& i : m_creds)
{
if(cert == i.certs[0])
{
return i.key.get();
}
}
return nullptr;
}
private:
struct Certificate_Info
{
std::vector<Botan::X509_Certificate> certs;
std::shared_ptr<Botan::Private_Key> key;
};
std::vector<Certificate_Info> m_creds;
std::vector<std::shared_ptr<Botan::Certificate_Store>> m_certstores;
};
#endif
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