forked from Mirrorlandia_minetest/minetest
82e35edff5
Adds everything needed for SRP (and everything works too), but still deactivated, as protocol v25 init packets aren't final yet. Can be activated by changing the LATEST_PROTOCOL_VERSION header to 25 inside networkprotocol.h.
127 lines
3.9 KiB
C++
127 lines
3.9 KiB
C++
/*
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Minetest
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Copyright (C) 2015 est31 <MTest31@outlook.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <algorithm>
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#include <string>
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#include "auth.h"
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#include "base64.h"
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#include "sha1.h"
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#include "srp.h"
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#include "string.h"
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// Get an sha-1 hash of the player's name combined with
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// the password entered. That's what the server uses as
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// their password. (Exception : if the password field is
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// blank, we send a blank password - this is for backwards
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// compatibility with password-less players).
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std::string translatePassword(const std::string &name,
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const std::string &password)
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{
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if (password.length() == 0)
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return "";
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std::string slt = name + password;
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SHA1 sha1;
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sha1.addBytes(slt.c_str(), slt.length());
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unsigned char *digest = sha1.getDigest();
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std::string pwd = base64_encode(digest, 20);
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free(digest);
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return pwd;
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}
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void getSRPVerifier(const std::string &name,
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const std::string &password, char **salt, size_t *salt_len,
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char **bytes_v, size_t *len_v)
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{
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std::string n_name = lowercase(name);
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srp_create_salted_verification_key(SRP_SHA256, SRP_NG_2048,
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n_name.c_str(), (const unsigned char *)password.c_str(),
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password.size(), (unsigned char **)salt, salt_len,
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(unsigned char **)bytes_v, len_v, NULL, NULL);
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}
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// Get a db-ready SRP verifier
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// The salt param is only modifyable by this method so that you can free it
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// if it was allocated. You shouldn't use it for other purposes, as you will
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// need the contents of salt_len too.
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inline static std::string getSRPVerifier(const std::string &name,
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const std::string &password, char ** salt, size_t salt_len)
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{
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char * bytes_v = NULL;
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size_t len_v;
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getSRPVerifier(name, password, salt, &salt_len,
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&bytes_v, &len_v);
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std::string ret_val = encodeSRPVerifier(std::string(bytes_v, len_v),
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std::string(*salt, salt_len));
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free(bytes_v);
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return ret_val;
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}
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// Get a db-ready SRP verifier
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std::string getSRPVerifier(const std::string &name,
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const std::string &password)
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{
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char * salt = NULL;
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std::string ret_val = getSRPVerifier(name,
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password, &salt, 0);
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free(salt);
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return ret_val;
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}
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// Get a db-ready SRP verifier
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std::string getSRPVerifier(const std::string &name,
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const std::string &password, const std::string &salt)
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{
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// The implementation won't change the salt if its set,
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// therefore we can cast.
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char *salt_cstr = (char *)salt.c_str();
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return getSRPVerifier(name, password,
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&salt_cstr, salt.size());
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}
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// Make a SRP verifier db-ready
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std::string encodeSRPVerifier(const std::string &verifier,
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const std::string &salt)
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{
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std::ostringstream ret_str;
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ret_str << "#1#"
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<< base64_encode((unsigned char*) salt.c_str(), salt.size()) << "#"
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<< base64_encode((unsigned char*) verifier.c_str(), verifier.size());
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return ret_str.str();
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}
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bool decodeSRPVerifier(const std::string &enc_pwd,
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std::string *salt, std::string *bytes_v)
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{
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std::vector<std::string> pwd_components = str_split(enc_pwd, '#');
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if ((pwd_components.size() != 4)
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|| (pwd_components[1] != "1") // 1 means srp
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|| !base64_is_valid(pwd_components[2])
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|| !base64_is_valid(pwd_components[3]))
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return false;
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std::string salt_str = base64_decode(pwd_components[2]);
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std::string bytes_v_str = base64_decode(pwd_components[3]);
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*salt = salt_str;
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*bytes_v = bytes_v_str;
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return true;
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}
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