Overhaul extensions/m_mkpasswd. It now allows SHA256/SHA512 hashes. DES support is removed, as it is insecure and can be broken on my desktop in about 20 minutes.
This commit is contained in:
Elizabeth Jennifer Myers
parent
12e395252c
commit
28545c3683
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@ -1,27 +1,15 @@
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/*
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* m_mkpasswd.c: Encrypts a password online, DES or MD5.
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* m_mkpasswd.c: Encrypts a password online.
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*
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* Copyright 2002 W. Campbell and the ircd-ratbox development team
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* Based on mkpasswd.c, originally by Nelson Minar (minar@reed.edu)
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*
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* You can use this code in any way as long as these names remain.
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*
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*/
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/* List of ircd includes from ../include/ */
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#include "stdinc.h"
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#include "client.h"
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#include "common.h" /* FALSE bleah */
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#include "ircd.h"
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#include "match.h"
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#include "numeric.h"
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#include "s_newconf.h"
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#include "s_conf.h"
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#include "logger.h"
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#include "s_serv.h"
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#include "send.h"
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#include "msg.h"
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#include "parse.h"
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#include "modules.h"
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#include <string.h>
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@ -30,11 +18,15 @@ static int m_mkpasswd(struct Client *client_p, struct Client *source_p,
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int parc, const char *parv[]);
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static int mo_mkpasswd(struct Client *client_p, struct Client *source_p,
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int parc, const char *parv[]);
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static char *make_salt(void);
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static char *make_md5_salt(void);
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static char saltChars[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";
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static char *make_md5_salt(int);
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static char *make_sha256_salt(int);
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static char *make_sha512_salt(int);
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static char *generate_random_salt(char *, int);
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static char *generate_poor_salt(char *, int);
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static char saltChars[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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/* 0 .. 63, ascii - 64 */
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struct Message mkpasswd_msgtab = {
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"MKPASSWD", 0, 0, 0, MFLG_SLOW,
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@ -43,14 +35,31 @@ struct Message mkpasswd_msgtab = {
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mapi_clist_av1 mkpasswd_clist[] = { &mkpasswd_msgtab, NULL };
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DECLARE_MODULE_AV1(mkpasswd, NULL, NULL, mkpasswd_clist, NULL, NULL, "$Revision: 3161 $");
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DECLARE_MODULE_AV1(mkpasswd, NULL, NULL, mkpasswd_clist, NULL, NULL, "$Revision$");
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/* m_mkpasswd - mkpasswd message handler
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* parv[1] = password
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* parv[2] = type
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*/
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static int
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m_mkpasswd(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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static time_t last_used = 0;
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int is_md5 = 0;
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char *salt;
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const char *hashtype;
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const char hashdefault[] = "SHA512";
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if(EmptyString(parv[1]))
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{
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sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), me.name, source_p->name, "MKPASSWD");
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return 0;
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}
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if(parc < 3)
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hashtype = hashdefault;
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else
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hashtype = parv[2];
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if((last_used + ConfigFileEntry.pace_wait) > rb_current_time())
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{
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@ -59,101 +68,150 @@ m_mkpasswd(struct Client *client_p, struct Client *source_p, int parc, const cha
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return 0;
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}
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else
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{
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last_used = rb_current_time();
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}
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if(parc == 3)
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{
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if(!irccmp(parv[2], "MD5"))
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{
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is_md5 = 1;
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}
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else if(!irccmp(parv[2], "DES"))
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{
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/* Not really needed, but we may want to have a default encryption
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* setting somewhere down the road
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*/
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is_md5 = 0;
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}
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else
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{
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sendto_one_notice(source_p, ":MKPASSWD syntax error: MKPASSWD pass [DES|MD5]");
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return 0;
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}
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}
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if(parc == 1)
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sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), me.name, source_p->name, "MKPASSWD");
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else
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sendto_one_notice(source_p, ":Encryption for [%s]: %s",
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parv[1], rb_crypt(parv[1],
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is_md5 ? make_md5_salt() :
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make_salt()));
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return 0;
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}
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/*
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** mo_test
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** parv[1] = parameter
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*/
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static int
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mo_mkpasswd(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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int is_md5 = 0;
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if(parc == 3)
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{
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if(!irccmp(parv[2], "MD5"))
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{
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is_md5 = 1;
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}
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else if(!irccmp(parv[2], "DES"))
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{
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/* Not really needed, but we may want to have a default encryption
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* setting somewhere down the road
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*/
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is_md5 = 0;
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}
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if(!irccmp(hashtype, "SHA256"))
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salt = make_sha256_salt(16);
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else if(!irccmp(hashtype, "SHA512"))
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salt = make_sha512_salt(16);
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else if(!irccmp(hashtype, "MD5"))
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salt = make_md5_salt(8);
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else
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{
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sendto_one_notice(source_p,
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":MKPASSWD syntax error: MKPASSWD pass [DES|MD5]");
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":MKPASSWD syntax error: MKPASSWD pass [SHA256|SHA512|MD5]");
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return 0;
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}
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}
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if(parc == 1)
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sendto_one_notice(source_p, ":Hash [%s] for %s: %s", hashtype, parv[1], rb_crypt(parv[1], salt));
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return 0;
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}
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/* mo_mkpasswd - mkpasswd message handler
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* parv[1] = password
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* parv[2] = type
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*/
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static int
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mo_mkpasswd(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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char *salt;
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const char *hashtype;
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const char hashdefault[] = "SHA512";
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if(EmptyString(parv[1]))
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{
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sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), me.name, source_p->name, "MKPASSWD");
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else
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sendto_one_notice(source_p, ":Encryption for [%s]: %s",
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parv[1], rb_crypt(parv[1], is_md5 ? make_md5_salt() : make_salt()));
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return 0;
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}
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if(parc < 3)
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hashtype = hashdefault;
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else
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hashtype = parv[2];
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if(!irccmp(hashtype, "SHA256"))
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salt = make_sha256_salt(16);
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else if(!irccmp(hashtype, "SHA512"))
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salt = make_sha512_salt(16);
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else if(!irccmp(hashtype, "MD5"))
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salt = make_md5_salt(8);
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else
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{
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sendto_one_notice(source_p,
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":MKPASSWD syntax error: MKPASSWD pass [SHA256|SHA512|MD5]");
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return 0;
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}
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sendto_one_notice(source_p, ":Hash [%s] for %s: %s", hashtype, parv[1], rb_crypt(parv[1], salt));
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return 0;
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}
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static char *
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make_salt(void)
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char *
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make_md5_salt(int length)
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{
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static char salt[3];
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salt[0] = saltChars[random() % 64];
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salt[1] = saltChars[random() % 64];
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salt[2] = '\0';
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return salt;
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}
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static char *
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make_md5_salt(void)
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{
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static char salt[13];
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int i;
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static char salt[21];
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if(length > 16)
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{
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printf("MD5 salt length too long\n");
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exit(0);
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}
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salt[0] = '$';
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salt[1] = '1';
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salt[2] = '$';
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for(i = 3; i < 11; i++)
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salt[i] = saltChars[random() % 64];
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salt[11] = '$';
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salt[12] = '\0';
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generate_random_salt(&salt[3], length);
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salt[length + 3] = '$';
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salt[length + 4] = '\0';
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return salt;
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}
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char *
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make_sha256_salt(int length)
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{
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static char salt[21];
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if(length > 16)
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{
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printf("SHA256 salt length too long\n");
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exit(0);
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}
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salt[0] = '$';
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salt[1] = '5';
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salt[2] = '$';
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generate_random_salt(&salt[3], length);
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salt[length + 3] = '$';
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salt[length + 4] = '\0';
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return salt;
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}
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char *
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make_sha512_salt(int length)
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{
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static char salt[21];
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if(length > 16)
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{
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printf("SHA512 salt length too long\n");
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exit(0);
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}
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salt[0] = '$';
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salt[1] = '6';
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salt[2] = '$';
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generate_random_salt(&salt[3], length);
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salt[length + 3] = '$';
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salt[length + 4] = '\0';
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return salt;
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}
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char *
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generate_poor_salt(char *salt, int length)
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{
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int i;
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srand(time(NULL));
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for(i = 0; i < length; i++)
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{
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salt[i] = saltChars[rand() % 64];
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}
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return (salt);
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}
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char *
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generate_random_salt(char *salt, int length)
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{
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char *buf;
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int fd, i;
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if((fd = open("/dev/random", O_RDONLY)) < 0)
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{
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return (generate_poor_salt(salt, length));
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}
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buf = calloc(1, length);
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if(read(fd, buf, length) != length)
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{
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free(buf);
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return (generate_poor_salt(salt, length));
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}
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for(i = 0; i < length; i++)
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{
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salt[i] = saltChars[abs(buf[i]) % 64];
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}
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free(buf);
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return (salt);
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}
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