[irc/freenode/solanum.git] / modules / m_challenge.c

/*
 *  ircd-ratbox: A slightly useful ircd.
 *  m_challenge.c: Allows an IRC Operator to securely authenticate.
 *
 *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
 *  Copyright (C) 1996-2002 Hybrid Development Team
 *  Copyright (C) 2002-2005 ircd-ratbox development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 */

#include "stdinc.h"

#ifdef HAVE_LIBCRYPTO
#include <openssl/pem.h>
#include <openssl/rand.h>
#include <openssl/rsa.h>
#include <openssl/md5.h>
#include <openssl/bn.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#endif

#include "client.h"
#include "ircd.h"
#include "modules.h"
#include "numeric.h"
#include "send.h"
#include "s_conf.h"
#include "msg.h"
#include "parse.h"
#include "match.h"
#include "logger.h"
#include "s_user.h"
#include "cache.h"
#include "s_newconf.h"

#define CHALLENGE_WIDTH BUFSIZE - (NICKLEN + HOSTLEN + 12)
#define CHALLENGE_EXPIRES	180	/* 180 seconds should be more than long enough */
#define CHALLENGE_SECRET_LENGTH	128	/* how long our challenge secret should be */

#ifndef HAVE_LIBCRYPTO

static const char challenge_desc[] = "Does nothing as OpenSSL was not enabled.";

/* Maybe this should be an error or something?-davidt */
/* now it is	-larne	*/
static int challenge_load(void)
{
	sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
		"Challenge module not loaded because OpenSSL is not available.");
	ilog(L_MAIN, "Challenge module not loaded because OpenSSL is not available.");
	return -1;
}

DECLARE_MODULE_AV2(challenge, challenge_load, NULL, NULL, NULL, NULL, NULL, NULL, challenge_desc);
#else

static const char challenge_desc[] =
	"Provides the challenge-response facility used for becoming an IRC operator";

static void m_challenge(struct MsgBuf *, struct Client *, struct Client *, int, const char **);

/* We have openssl support, so include /CHALLENGE */
struct Message challenge_msgtab = {
	"CHALLENGE", 0, 0, 0, 0,
	{mg_unreg, {m_challenge, 2}, mg_ignore, mg_ignore, mg_ignore, {m_challenge, 2}}
};

mapi_clist_av1 challenge_clist[] = { &challenge_msgtab, NULL };

DECLARE_MODULE_AV2(challenge, NULL, NULL, challenge_clist, NULL, NULL, NULL, NULL, challenge_desc);

static bool generate_challenge(char **r_challenge, char **r_response, RSA * key);

static void
cleanup_challenge(struct Client *target_p)
{
	if(target_p->localClient == NULL)
		return;

	rb_free(target_p->localClient->challenge);
	rb_free(target_p->user->opername);
	target_p->localClient->challenge = NULL;
	target_p->user->opername = NULL;
	target_p->localClient->chal_time = 0;
}

/*
 * m_challenge - generate RSA challenge for wouldbe oper
 * parv[1] = operator to challenge for, or +response
 */
static void
m_challenge(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
	struct oper_conf *oper_p;
	char *challenge = NULL; /* to placate gcc */
	char chal_line[CHALLENGE_WIDTH];
	unsigned char *b_response;
	size_t cnt;
	int len = 0;

	/* if theyre an oper, reprint oper motd and ignore */
	if(IsOper(source_p))
	{
		sendto_one(source_p, form_str(RPL_YOUREOPER), me.name, source_p->name);
		send_oper_motd(source_p);
		return;
	}

	if(*parv[1] == '+')
	{
		/* Ignore it if we aren't expecting this... -A1kmm */
		if(!source_p->localClient->challenge)
			return;

		if((rb_current_time() - source_p->localClient->chal_time) > CHALLENGE_EXPIRES)
		{
			sendto_one(source_p, form_str(ERR_PASSWDMISMATCH), me.name, source_p->name);
			ilog(L_FOPER, "EXPIRED CHALLENGE (%s) by (%s!%s@%s) (%s)",
			     source_p->user->opername, source_p->name,
			     source_p->username, source_p->host, source_p->sockhost);

			if(ConfigFileEntry.failed_oper_notice)
				sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
						     "Expired CHALLENGE attempt by %s (%s@%s)",
						     source_p->name, source_p->username,
						     source_p->host);
			cleanup_challenge(source_p);
			return;
		}

		parv[1]++;
		b_response = rb_base64_decode((const unsigned char *)parv[1], strlen(parv[1]), &len);

		if(len != SHA_DIGEST_LENGTH ||
		   memcmp(source_p->localClient->challenge, b_response, SHA_DIGEST_LENGTH))
		{
			sendto_one(source_p, form_str(ERR_PASSWDMISMATCH), me.name, source_p->name);
			ilog(L_FOPER, "FAILED CHALLENGE (%s) by (%s!%s@%s) (%s)",
			     source_p->user->opername, source_p->name,
			     source_p->username, source_p->host, source_p->sockhost);

			if(ConfigFileEntry.failed_oper_notice)
				sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
						     "Failed CHALLENGE attempt by %s (%s@%s)",
						     source_p->name, source_p->username,
						     source_p->host);

			rb_free(b_response);
			cleanup_challenge(source_p);
			return;
		}

		rb_free(b_response);

		oper_p = find_oper_conf(source_p->username, source_p->orighost,
					source_p->sockhost,
					source_p->user->opername);

		if(oper_p == NULL)
		{
			sendto_one_numeric(source_p, ERR_NOOPERHOST, form_str(ERR_NOOPERHOST));
			ilog(L_FOPER, "FAILED OPER (%s) by (%s!%s@%s) (%s)",
			     source_p->user->opername, source_p->name,
			     source_p->username, source_p->host,
			     source_p->sockhost);

			if(ConfigFileEntry.failed_oper_notice)
				sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
						     "Failed CHALLENGE attempt - host mismatch by %s (%s@%s)",
						     source_p->name, source_p->username,
						     source_p->host);
			return;
		}

		cleanup_challenge(source_p);

		oper_up(source_p, oper_p);

		ilog(L_OPERED, "OPER %s by %s!%s@%s (%s)",
		     source_p->user->opername, source_p->name,
		     source_p->username, source_p->host, source_p->sockhost);
		return;
	}

	cleanup_challenge(source_p);

	oper_p = find_oper_conf(source_p->username, source_p->orighost,
				source_p->sockhost, parv[1]);

	if(oper_p == NULL)
	{
		sendto_one_numeric(source_p, ERR_NOOPERHOST, form_str(ERR_NOOPERHOST));
		ilog(L_FOPER, "FAILED OPER (%s) by (%s!%s@%s) (%s)",
		     parv[1], source_p->name,
		     source_p->username, source_p->host, source_p->sockhost);

		if(ConfigFileEntry.failed_oper_notice)
			sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
					     "Failed CHALLENGE attempt - host mismatch by %s (%s@%s)",
					     source_p->name, source_p->username, source_p->host);
		return;
	}

	if(!oper_p->rsa_pubkey)
	{
		sendto_one_notice(source_p, ":I'm sorry, PK authentication is not enabled for your oper{} block.");
		return;
	}

	if(IsOperConfNeedSSL(oper_p) && !IsSecureClient(source_p))
	{
		sendto_one_numeric(source_p, ERR_NOOPERHOST, form_str(ERR_NOOPERHOST));
		ilog(L_FOPER, "FAILED CHALLENGE (%s) by (%s!%s@%s) (%s) -- requires SSL/TLS",
		     parv[1], source_p->name, source_p->username, source_p->host,
		     source_p->sockhost);

		if(ConfigFileEntry.failed_oper_notice)
		{
			sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
					     "Failed CHALLENGE attempt - missing SSL/TLS by %s (%s@%s)",
					     source_p->name, source_p->username, source_p->host);
		}
		return;
	}

	if (oper_p->certfp != NULL)
	{
		if (source_p->certfp == NULL || rb_strcasecmp(source_p->certfp, oper_p->certfp))
		{
			sendto_one_numeric(source_p, ERR_NOOPERHOST, form_str(ERR_NOOPERHOST));
			ilog(L_FOPER, "FAILED OPER (%s) by (%s!%s@%s) (%s) -- client certificate fingerprint mismatch",
			     parv[1], source_p->name,
			     source_p->username, source_p->host, source_p->sockhost);

			if(ConfigFileEntry.failed_oper_notice)
			{
				sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
						     "Failed OPER attempt - client certificate fingerprint mismatch by %s (%s@%s)",
						     source_p->name, source_p->username, source_p->host);
			}
			return;
		}
	}

	if(generate_challenge(&challenge, &(source_p->localClient->challenge), oper_p->rsa_pubkey))
	{
		char *chal = challenge;
		source_p->localClient->chal_time = rb_current_time();
		for(;;)
		{
			cnt = rb_strlcpy(chal_line, chal, CHALLENGE_WIDTH);
			sendto_one(source_p, form_str(RPL_RSACHALLENGE2), me.name, source_p->name, chal_line);
			if(cnt > CHALLENGE_WIDTH)
				chal += CHALLENGE_WIDTH - 1;
			else
				break;

		}
		sendto_one(source_p, form_str(RPL_ENDOFRSACHALLENGE2),
			   me.name, source_p->name);
		rb_free(challenge);
		source_p->user->opername = rb_strdup(oper_p->name);
	}
	else
		sendto_one_notice(source_p, ":Failed to generate challenge.");
}

static bool
generate_challenge(char **r_challenge, char **r_response, RSA * rsa)
{
	SHA_CTX ctx;
	unsigned char secret[CHALLENGE_SECRET_LENGTH], *tmp;
	unsigned long length;
	unsigned long e = 0;
	unsigned long cnt = 0;
	int ret;

	if(!rsa)
		return false;
	if(rb_get_random(secret, CHALLENGE_SECRET_LENGTH))
	{
		SHA1_Init(&ctx);
		SHA1_Update(&ctx, (uint8_t *)secret, CHALLENGE_SECRET_LENGTH);
		*r_response = malloc(SHA_DIGEST_LENGTH);
		SHA1_Final((uint8_t *)*r_response, &ctx);

		length = RSA_size(rsa);
		tmp = rb_malloc(length);
		ret = RSA_public_encrypt(CHALLENGE_SECRET_LENGTH, secret, tmp, rsa, RSA_PKCS1_OAEP_PADDING);

		if(ret >= 0)
		{
			*r_challenge = (char *)rb_base64_encode(tmp, ret);
			rb_free(tmp);
			return true;
		}

		rb_free(tmp);
		rb_free(*r_response);
		*r_response = NULL;
	}

	ERR_load_crypto_strings();
	while ((cnt < 100) && (e = ERR_get_error()))
	{
		ilog(L_MAIN, "SSL error: %s", ERR_error_string(e, 0));
		cnt++;
	}

	return false;
}

#endif /* HAVE_LIBCRYPTO */
Commit	Line	Data
212380e3 WP	1	/*
	2	* ircd-ratbox: A slightly useful ircd.
	3	* m_challenge.c: Allows an IRC Operator to securely authenticate.
	4	*
	5	* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
	6	* Copyright (C) 1996-2002 Hybrid Development Team
	7	* Copyright (C) 2002-2005 ircd-ratbox development team
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
	22	* USA
212380e3 WP	23	*/
	24
	25	#include "stdinc.h"
	26
	27	#ifdef HAVE_LIBCRYPTO
	28	#include <openssl/pem.h>
	29	#include <openssl/rand.h>
	30	#include <openssl/rsa.h>
	31	#include <openssl/md5.h>
	32	#include <openssl/bn.h>
	33	#include <openssl/evp.h>
	34	#include <openssl/err.h>
	35	#endif
	36
212380e3 WP	37	#include "client.h"
	38	#include "ircd.h"
	39	#include "modules.h"
	40	#include "numeric.h"
	41	#include "send.h"
	42	#include "s_conf.h"
	43	#include "msg.h"
	44	#include "parse.h"
4562c604	45	#include "match.h"
4016731b	46	#include "logger.h"
212380e3 WP	47	#include "s_user.h"
	48	#include "cache.h"
	49	#include "s_newconf.h"
	50
	51	#define CHALLENGE_WIDTH BUFSIZE - (NICKLEN + HOSTLEN + 12)
	52	#define CHALLENGE_EXPIRES 180 /* 180 seconds should be more than long enough */
	53	#define CHALLENGE_SECRET_LENGTH 128 /* how long our challenge secret should be */
	54
	55	#ifndef HAVE_LIBCRYPTO
eeabf33a EM	56
	57	static const char challenge_desc[] = "Does nothing as OpenSSL was not enabled.";
	58
212380e3 WP	59	/* Maybe this should be an error or something?-davidt */
212380e3 WP	60	/* now it is -larne */
eeabf33a	61	static int challenge_load(void)
212380e3	62	{
a9227555	63	sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
212380e3 WP	64	"Challenge module not loaded because OpenSSL is not available.");
	65	ilog(L_MAIN, "Challenge module not loaded because OpenSSL is not available.");
	66	return -1;
212380e3 WP	67	}
212380e3 WP	68
5544da98	69	DECLARE_MODULE_AV2(challenge, challenge_load, NULL, NULL, NULL, NULL, NULL, NULL, challenge_desc);
212380e3 WP	70	#else
212380e3 WP	71
eeabf33a EM	72	static const char challenge_desc[] =
	73	"Provides the challenge-response facility used for becoming an IRC operator";
	74
3c7d6fcc	75	static void m_challenge(struct MsgBuf , struct Client , struct Client , int, const char *);
212380e3 WP	76
	77	/* We have openssl support, so include /CHALLENGE */
	78	struct Message challenge_msgtab = {
7baa37a9	79	"CHALLENGE", 0, 0, 0, 0,
212380e3 WP	80	{mg_unreg, {m_challenge, 2}, mg_ignore, mg_ignore, mg_ignore, {m_challenge, 2}}
	81	};
	82
	83	mapi_clist_av1 challenge_clist[] = { &challenge_msgtab, NULL };
5544da98	84
5544da98	85	DECLARE_MODULE_AV2(challenge, NULL, NULL, challenge_clist, NULL, NULL, NULL, NULL, challenge_desc);
212380e3	86
3c7d6fcc	87	static bool generate_challenge(char r_challenge, char r_response, RSA * key);
212380e3 WP	88
	89	static void
	90	cleanup_challenge(struct Client *target_p)
	91	{
	92	if(target_p->localClient == NULL)
	93	return;
55abcbb2	94
637c4932	95	rb_free(target_p->localClient->challenge);
ed3ca2ff	96	rb_free(target_p->user->opername);
212380e3	97	target_p->localClient->challenge = NULL;
ed3ca2ff	98	target_p->user->opername = NULL;
212380e3 WP	99	target_p->localClient->chal_time = 0;
	100	}
	101
	102	/*
	103	* m_challenge - generate RSA challenge for wouldbe oper
212380e3	104	* parv[1] = operator to challenge for, or +response
212380e3	105	*/
3c7d6fcc	106	static void
428ca87b	107	m_challenge(struct MsgBuf msgbuf_p, struct Client client_p, struct Client source_p, int parc, const char parv[])
212380e3 WP	108	{
	109	struct oper_conf *oper_p;
	110	char challenge = NULL; / to placate gcc */
55abcbb2	111	char chal_line[CHALLENGE_WIDTH];
212380e3 WP	112	unsigned char *b_response;
	113	size_t cnt;
	114	int len = 0;
	115
	116	/* if theyre an oper, reprint oper motd and ignore */
	117	if(IsOper(source_p))
	118	{
	119	sendto_one(source_p, form_str(RPL_YOUREOPER), me.name, source_p->name);
	120	send_oper_motd(source_p);
3c7d6fcc	121	return;
212380e3 WP	122	}
	123
	124	if(*parv[1] == '+')
	125	{
	126	/* Ignore it if we aren't expecting this... -A1kmm */
	127	if(!source_p->localClient->challenge)
3c7d6fcc	128	return;
212380e3	129
e3354945	130	if((rb_current_time() - source_p->localClient->chal_time) > CHALLENGE_EXPIRES)
212380e3 WP	131	{
	132	sendto_one(source_p, form_str(ERR_PASSWDMISMATCH), me.name, source_p->name);
	133	ilog(L_FOPER, "EXPIRED CHALLENGE (%s) by (%s!%s@%s) (%s)",
ed3ca2ff	134	source_p->user->opername, source_p->name,
212380e3 WP	135	source_p->username, source_p->host, source_p->sockhost);
	136
	137	if(ConfigFileEntry.failed_oper_notice)
	138	sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
	139	"Expired CHALLENGE attempt by %s (%s@%s)",
	140	source_p->name, source_p->username,
	141	source_p->host);
	142	cleanup_challenge(source_p);
3c7d6fcc	143	return;
212380e3 WP	144	}
212380e3 WP	145
6493f05d EM	146	parv[1]++;
6493f05d EM	147	b_response = rb_base64_decode((const unsigned char *)parv[1], strlen(parv[1]), &len);
212380e3 WP	148
	149	if(len != SHA_DIGEST_LENGTH \|\|
	150	memcmp(source_p->localClient->challenge, b_response, SHA_DIGEST_LENGTH))
	151	{
	152	sendto_one(source_p, form_str(ERR_PASSWDMISMATCH), me.name, source_p->name);
	153	ilog(L_FOPER, "FAILED CHALLENGE (%s) by (%s!%s@%s) (%s)",
ed3ca2ff	154	source_p->user->opername, source_p->name,
212380e3 WP	155	source_p->username, source_p->host, source_p->sockhost);
	156
	157	if(ConfigFileEntry.failed_oper_notice)
	158	sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
	159	"Failed CHALLENGE attempt by %s (%s@%s)",
	160	source_p->name, source_p->username,
	161	source_p->host);
	162
637c4932	163	rb_free(b_response);
212380e3	164	cleanup_challenge(source_p);
3c7d6fcc	165	return;
212380e3 WP	166	}
212380e3 WP	167
637c4932	168	rb_free(b_response);
212380e3	169
55abcbb2 KB	170	oper_p = find_oper_conf(source_p->username, source_p->orighost,
55abcbb2 KB	171	source_p->sockhost,
ed3ca2ff	172	source_p->user->opername);
212380e3 WP	173
	174	if(oper_p == NULL)
	175	{
76169ea7	176	sendto_one_numeric(source_p, ERR_NOOPERHOST, form_str(ERR_NOOPERHOST));
212380e3	177	ilog(L_FOPER, "FAILED OPER (%s) by (%s!%s@%s) (%s)",
ed3ca2ff	178	source_p->user->opername, source_p->name,
212380e3 WP	179	source_p->username, source_p->host,
	180	source_p->sockhost);
	181
	182	if(ConfigFileEntry.failed_oper_notice)
	183	sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
	184	"Failed CHALLENGE attempt - host mismatch by %s (%s@%s)",
	185	source_p->name, source_p->username,
	186	source_p->host);
3c7d6fcc	187	return;
212380e3 WP	188	}
	189
	190	cleanup_challenge(source_p);
	191
	192	oper_up(source_p, oper_p);
	193
	194	ilog(L_OPERED, "OPER %s by %s!%s@%s (%s)",
ed3ca2ff	195	source_p->user->opername, source_p->name,
212380e3	196	source_p->username, source_p->host, source_p->sockhost);
3c7d6fcc	197	return;
212380e3 WP	198	}
	199
	200	cleanup_challenge(source_p);
	201
55abcbb2	202	oper_p = find_oper_conf(source_p->username, source_p->orighost,
212380e3 WP	203	source_p->sockhost, parv[1]);
	204
	205	if(oper_p == NULL)
	206	{
76169ea7	207	sendto_one_numeric(source_p, ERR_NOOPERHOST, form_str(ERR_NOOPERHOST));
212380e3 WP	208	ilog(L_FOPER, "FAILED OPER (%s) by (%s!%s@%s) (%s)",
	209	parv[1], source_p->name,
	210	source_p->username, source_p->host, source_p->sockhost);
	211
	212	if(ConfigFileEntry.failed_oper_notice)
	213	sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
	214	"Failed CHALLENGE attempt - host mismatch by %s (%s@%s)",
	215	source_p->name, source_p->username, source_p->host);
3c7d6fcc	216	return;
212380e3 WP	217	}
	218
	219	if(!oper_p->rsa_pubkey)
	220	{
5366977b	221	sendto_one_notice(source_p, ":I'm sorry, PK authentication is not enabled for your oper{} block.");
3c7d6fcc	222	return;
212380e3 WP	223	}
212380e3 WP	224
35eccf49	225	if(IsOperConfNeedSSL(oper_p) && !IsSecureClient(source_p))
b1594414	226	{
76169ea7	227	sendto_one_numeric(source_p, ERR_NOOPERHOST, form_str(ERR_NOOPERHOST));
b1594414 JT	228	ilog(L_FOPER, "FAILED CHALLENGE (%s) by (%s!%s@%s) (%s) -- requires SSL/TLS",
	229	parv[1], source_p->name, source_p->username, source_p->host,
	230	source_p->sockhost);
	231
	232	if(ConfigFileEntry.failed_oper_notice)
	233	{
a9227555	234	sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
b1594414 JT	235	"Failed CHALLENGE attempt - missing SSL/TLS by %s (%s@%s)",
	236	source_p->name, source_p->username, source_p->host);
	237	}
3c7d6fcc	238	return;
b1594414 JT	239	}
b1594414 JT	240
ed8b3d69 WP	241	if (oper_p->certfp != NULL)
ed8b3d69 WP	242	{
f956cb0f	243	if (source_p->certfp == NULL \|\| rb_strcasecmp(source_p->certfp, oper_p->certfp))
ed8b3d69 WP	244	{
	245	sendto_one_numeric(source_p, ERR_NOOPERHOST, form_str(ERR_NOOPERHOST));
	246	ilog(L_FOPER, "FAILED OPER (%s) by (%s!%s@%s) (%s) -- client certificate fingerprint mismatch",
fad065bb	247	parv[1], source_p->name,
ed8b3d69 WP	248	source_p->username, source_p->host, source_p->sockhost);
	249
	250	if(ConfigFileEntry.failed_oper_notice)
	251	{
a9227555	252	sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
ed8b3d69 WP	253	"Failed OPER attempt - client certificate fingerprint mismatch by %s (%s@%s)",
	254	source_p->name, source_p->username, source_p->host);
	255	}
3c7d6fcc	256	return;
ed8b3d69 WP	257	}
	258	}
	259
3c7d6fcc	260	if(generate_challenge(&challenge, &(source_p->localClient->challenge), oper_p->rsa_pubkey))
212380e3 WP	261	{
212380e3 WP	262	char *chal = challenge;
e3354945	263	source_p->localClient->chal_time = rb_current_time();
212380e3 WP	264	for(;;)
212380e3 WP	265	{
f427c8b0	266	cnt = rb_strlcpy(chal_line, chal, CHALLENGE_WIDTH);
212380e3 WP	267	sendto_one(source_p, form_str(RPL_RSACHALLENGE2), me.name, source_p->name, chal_line);
	268	if(cnt > CHALLENGE_WIDTH)
	269	chal += CHALLENGE_WIDTH - 1;
	270	else
	271	break;
55abcbb2	272
212380e3	273	}
55abcbb2	274	sendto_one(source_p, form_str(RPL_ENDOFRSACHALLENGE2),
212380e3	275	me.name, source_p->name);
637c4932	276	rb_free(challenge);
ed3ca2ff	277	source_p->user->opername = rb_strdup(oper_p->name);
212380e3 WP	278	}
	279	else
	280	sendto_one_notice(source_p, ":Failed to generate challenge.");
212380e3 WP	281	}
212380e3 WP	282
3c7d6fcc	283	static bool
212380e3 WP	284	generate_challenge(char r_challenge, char r_response, RSA * rsa)
	285	{
	286	SHA_CTX ctx;
	287	unsigned char secret[CHALLENGE_SECRET_LENGTH], *tmp;
	288	unsigned long length;
	289	unsigned long e = 0;
	290	unsigned long cnt = 0;
	291	int ret;
	292
	293	if(!rsa)
3c7d6fcc	294	return false;
f55930ac	295	if(rb_get_random(secret, CHALLENGE_SECRET_LENGTH))
212380e3 WP	296	{
212380e3 WP	297	SHA1_Init(&ctx);
f55930ac VY	298	SHA1_Update(&ctx, (uint8_t *)secret, CHALLENGE_SECRET_LENGTH);
	299	*r_response = malloc(SHA_DIGEST_LENGTH);
	300	SHA1_Final((uint8_t )r_response, &ctx);
212380e3 WP	301
212380e3 WP	302	length = RSA_size(rsa);
eddc2ab6	303	tmp = rb_malloc(length);
212380e3 WP	304	ret = RSA_public_encrypt(CHALLENGE_SECRET_LENGTH, secret, tmp, rsa, RSA_PKCS1_OAEP_PADDING);
212380e3 WP	305
f55930ac	306	if(ret >= 0)
212380e3	307	{
f55930ac	308	r_challenge = (char )rb_base64_encode(tmp, ret);
637c4932	309	rb_free(tmp);
3c7d6fcc	310	return true;
212380e3	311	}
f55930ac	312
637c4932 VY	313	rb_free(tmp);
637c4932 VY	314	rb_free(*r_response);
212380e3 WP	315	*r_response = NULL;
	316	}
	317
	318	ERR_load_crypto_strings();
	319	while ((cnt < 100) && (e = ERR_get_error()))
	320	{
	321	ilog(L_MAIN, "SSL error: %s", ERR_error_string(e, 0));
	322	cnt++;
	323	}
	324
3c7d6fcc	325	return false;
212380e3 WP	326	}
	327
	328	#endif /* HAVE_LIBCRYPTO */