1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
15 #include "commands/cmd_whois.h"
16 #include "commands/cmd_stats.h"
19 #include "transport.h"
21 #include "socketengine.h"
23 #include "m_spanningtree/main.h"
24 #include "m_spanningtree/utils.h"
25 #include "m_spanningtree/treeserver.h"
26 #include "m_spanningtree/link.h"
27 #include "m_spanningtree/treesocket.h"
28 #include "m_spanningtree/resolvers.h"
29 #include "m_spanningtree/handshaketimer.h"
31 /* $ModDep: m_spanningtree/resolvers.h m_spanningtree/main.h m_spanningtree/utils.h m_spanningtree/treeserver.h m_spanningtree/link.h m_spanningtree/treesocket.h m_hash.h */
33 const std::string& TreeSocket::GetOurChallenge()
35 return this->ourchallenge;
38 void TreeSocket::SetOurChallenge(const std::string &c)
40 this->ourchallenge = c;
43 const std::string& TreeSocket::GetTheirChallenge()
45 return this->theirchallenge;
48 void TreeSocket::SetTheirChallenge(const std::string &c)
50 this->theirchallenge = c;
53 std::string TreeSocket::MakePass(const std::string &password, const std::string &challenge)
55 /* This is a simple (maybe a bit hacky?) HMAC algorithm, thanks to jilles for
56 * suggesting the use of HMAC to secure the password against various attacks.
58 * Note: If m_sha256.so is not loaded, we MUST fall back to plaintext with no
59 * HMAC challenge/response.
61 Module* sha256 = ServerInstance->Modules->Find("m_sha256.so");
62 if (Utils->ChallengeResponse && sha256 && !challenge.empty())
64 /* XXX: This is how HMAC is supposed to be done:
66 * sha256( (pass xor 0x5c) + sha256((pass xor 0x36) + m) )
68 * Note that we are encoding the hex hash, not the binary
69 * output of the hash which is slightly different to standard.
71 * Don't ask me why its always 0x5c and 0x36... it just is.
73 std::string hmac1, hmac2;
75 for (size_t n = 0; n < password.length(); n++)
77 hmac1 += static_cast<char>(password[n] ^ 0x5C);
78 hmac2 += static_cast<char>(password[n] ^ 0x36);
82 HashResetRequest(Utils->Creator, sha256).Send();
83 hmac2 = HashSumRequest(Utils->Creator, sha256, hmac2).Send();
85 HashResetRequest(Utils->Creator, sha256).Send();
86 std::string hmac = hmac1 + hmac2;
87 hmac = HashSumRequest(Utils->Creator, sha256, hmac).Send();
89 return "HMAC-SHA256:"+ hmac;
91 else if (!challenge.empty() && !sha256)
92 ServerInstance->Logs->Log("m_spanningtree",DEFAULT,"Not authenticating to server using SHA256/HMAC because we don't have m_sha256 loaded!");
97 std::string TreeSocket::RandString(unsigned int ilength)
99 char* randombuf = new char[ilength+1];
104 int f = open("/dev/urandom", O_RDONLY, 0);
110 if (read(f, randombuf, ilength) < 1)
111 ServerInstance->Logs->Log("m_spanningtree", DEFAULT, "There are crack smoking monkeys in your kernel (in other words, nonblocking /dev/urandom blocked.)");
117 for (unsigned int i = 0; i < ilength; i++)
118 randombuf[i] = rand();
121 for (unsigned int i = 0; i < ilength; i++)
123 char randchar = static_cast<char>((randombuf[i] & 0x7F) | 0x21);
124 out += (randchar == '=' ? '_' : randchar);
131 bool TreeSocket::ComparePass(const std::string &ours, const std::string &theirs)
133 if ((!strncmp(ours.c_str(), "HMAC-SHA256:", 12)) || (!strncmp(theirs.c_str(), "HMAC-SHA256:", 12)))
135 /* One or both of us specified hmac sha256, but we don't have sha256 module loaded!
136 * We can't allow this password as valid.
138 if (!ServerInstance->Modules->Find("m_sha256.so") || !Utils->ChallengeResponse)
141 /* Straight string compare of hashes */
142 return ours == theirs;
145 /* Straight string compare of plaintext */
146 return ours == theirs;