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Adds force encryption option to iax.conf

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This patch adds forceencryption=yes as an iax.conf option.  When force encryption is enabled, no unencrypted connections are allowed.  This insures all connections are encrypted.  This is a new feature, so CHANGES and iax.conf.sample are updated as well.   

(closes issue #13285)
Reported by: sgofferj
Tested by: russell
Review: http://reviewboard.digium.com/r/150/



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@175344 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
David Vossel
2009-02-12 21:27:11 +00:00
parent 9e0f5d2afe
commit 178e6f06df
3 changed files with 71 additions and 19 deletions
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1
CHANGES
View File

@@ -546,6 +546,7 @@ IAX2 changes
* Added support for OSP. The token is set and retrieved through the CHANNEL()
dialplan function.
* Added immediate option to iax.conf
* Added forceencryption option to iax.conf
XMPP Google Talk/Jingle changes
-------------------------------

84
channels/chan_iax2.c
View File

@@ -377,6 +377,7 @@ enum iax2_flags {
IAX_ALLOWFWDOWNLOAD = (1 << 26), /*!< Allow the FWDOWNL command? */
IAX_NOKEYROTATE = (1 << 27), /*!< Disable key rotation with encryption */
IAX_IMMEDIATE = (1 << 28), /*!< Allow immediate off-hook to extension s */
IAX_FORCE_ENCRYPT = (1 << 29), /*!< Forces call encryption, if encryption not possible hangup */
};
static int global_rtautoclear = 120;
@@ -1939,8 +1940,7 @@ static int __find_callno(unsigned short callno, unsigned short dcallno, struct s
iaxs[x]->pingid = iax2_sched_add(sched, ping_time * 1000, send_ping, (void *)(long)x);
iaxs[x]->lagid = iax2_sched_add(sched, lagrq_time * 1000, send_lagrq, (void *)(long)x);
iaxs[x]->amaflags = amaflags;
ast_copy_flags(iaxs[x], &globalflags, IAX_NOTRANSFER | IAX_TRANSFERMEDIA | IAX_USEJITTERBUF | IAX_FORCEJITTERBUF | IAX_NOKEYROTATE);
ast_copy_flags(iaxs[x], &globalflags, IAX_NOTRANSFER | IAX_TRANSFERMEDIA | IAX_USEJITTERBUF | IAX_FORCEJITTERBUF | IAX_NOKEYROTATE | IAX_FORCE_ENCRYPT);
ast_string_field_set(iaxs[x], accountcode, accountcode);
ast_string_field_set(iaxs[x], mohinterpret, mohinterpret);
ast_string_field_set(iaxs[x], mohsuggest, mohsuggest);
@@ -3556,7 +3556,7 @@ static int create_addr(const char *peername, struct ast_channel *c, struct socka
if (peer->maxms && ((peer->lastms > peer->maxms) || (peer->lastms < 0)))
goto return_unref;
ast_copy_flags(cai, peer, IAX_SENDANI | IAX_TRUNK | IAX_NOTRANSFER | IAX_TRANSFERMEDIA | IAX_USEJITTERBUF | IAX_FORCEJITTERBUF | IAX_NOKEYROTATE);
ast_copy_flags(cai, peer, IAX_SENDANI | IAX_TRUNK | IAX_NOTRANSFER | IAX_TRANSFERMEDIA | IAX_USEJITTERBUF | IAX_FORCEJITTERBUF | IAX_NOKEYROTATE | IAX_FORCE_ENCRYPT);
cai->maxtime = peer->maxms;
cai->capability = peer->capability;
cai->encmethods = peer->encmethods;
@@ -3756,16 +3756,17 @@ static int iax2_call(struct ast_channel *c, char *dest, int timeout)
ast_log(LOG_WARNING, "No peer provided in the IAX2 dial string '%s'\n", dest);
return -1;
}
if (!pds.exten) {
pds.exten = defaultrdest;
}
if (create_addr(pds.peer, c, &sin, &cai)) {
ast_log(LOG_WARNING, "No address associated with '%s'\n", pds.peer);
return -1;
}
if (ast_strlen_zero(cai.secret) && ast_test_flag(iaxs[callno], IAX_FORCE_ENCRYPT)) {
ast_log(LOG_WARNING, "Call terminated. No secret given and force encrypt enabled\n");
return -1;
}
if (!pds.username && !ast_strlen_zero(cai.username))
pds.username = cai.username;
if (!pds.password && !ast_strlen_zero(cai.secret))
@@ -6221,11 +6222,7 @@ static int check_access(int callno, struct sockaddr_in *sin, struct iax_ies *ies
if (user->maxauthreq > 0)
ast_set_flag(iaxs[callno], IAX_MAXAUTHREQ);
iaxs[callno]->prefs = user->prefs;
ast_copy_flags(iaxs[callno], user, IAX_CODEC_USER_FIRST);
ast_copy_flags(iaxs[callno], user, IAX_IMMEDIATE);
ast_copy_flags(iaxs[callno], user, IAX_CODEC_NOPREFS);
ast_copy_flags(iaxs[callno], user, IAX_CODEC_NOCAP);
ast_copy_flags(iaxs[callno], user, IAX_NOKEYROTATE);
ast_copy_flags(iaxs[callno], user, IAX_CODEC_USER_FIRST | IAX_IMMEDIATE | IAX_CODEC_NOPREFS | IAX_CODEC_NOCAP | IAX_NOKEYROTATE | IAX_FORCE_ENCRYPT);
iaxs[callno]->encmethods = user->encmethods;
/* Store the requested username if not specified */
if (ast_strlen_zero(iaxs[callno]->username))
@@ -6403,7 +6400,10 @@ static int authenticate_verify(struct chan_iax2_pvt *p, struct iax_ies *ies)
ast_string_field_set(p, host, user->name);
user = user_unref(user);
}
if (ast_test_flag(p, IAX_FORCE_ENCRYPT) && !p->encmethods) {
ast_log(LOG_NOTICE, "Call Terminated, Incomming call is unencrypted while force encrypt is enabled.");
return res;
}
if (!ast_test_flag(&p->state, IAX_STATE_AUTHENTICATED))
return res;
if (ies->password)
@@ -6723,8 +6723,13 @@ static int authenticate_reply(struct chan_iax2_pvt *p, struct sockaddr_in *sin,
}
}
}
if (ies->encmethods)
if (ies->encmethods) {
ast_set_flag(p, IAX_ENCRYPTED | IAX_KEYPOPULATED);
} else if (ast_test_flag(iaxs[callno], IAX_FORCE_ENCRYPT)) {
ast_log(LOG_NOTICE, "Call initiated without encryption while forceencryption=yes option is set");
return -1; /* if force encryption is yes, and no encryption methods, then return -1 to hangup */
}
if (!res) {
struct ast_datastore *variablestore;
struct ast_variable *var, *prev = NULL;
@@ -8841,6 +8846,11 @@ retryowner:
ast_log(LOG_NOTICE, "Rejected connect attempt from %s, who was trying to reach '%s@%s'\n", ast_inet_ntoa(sin.sin_addr), iaxs[fr->callno]->exten, iaxs[fr->callno]->context);
break;
}
if (ast_strlen_zero(iaxs[fr->callno]->secret) && ast_test_flag(iaxs[fr->callno], IAX_FORCE_ENCRYPT)) {
auth_fail(fr->callno, IAX_COMMAND_REJECT);
ast_log(LOG_WARNING, "Rejected connect attempt. No secret present while force encrypt enabled.\n");
break;
}
if (strcasecmp(iaxs[fr->callno]->exten, "TBD")) {
const char *context, *exten, *cid_num;
@@ -10659,7 +10669,7 @@ static struct iax2_peer *build_peer(const char *name, struct ast_variable *v, st
if (ast_test_flag(&globalflags, IAX_NOKEYROTATE)) {
ast_copy_flags(peer, &globalflags, IAX_NOKEYROTATE);
}
ast_copy_flags(peer, &globalflags, IAX_USEJITTERBUF | IAX_FORCEJITTERBUF);
ast_copy_flags(peer, &globalflags, IAX_USEJITTERBUF | IAX_FORCEJITTERBUF | IAX_FORCE_ENCRYPT);
peer->encmethods = iax2_encryption;
peer->adsi = adsi;
ast_string_field_set(peer,secret,"");
@@ -10709,6 +10719,18 @@ static struct iax2_peer *build_peer(const char *name, struct ast_variable *v, st
peer->authmethods = get_auth_methods(v->value);
} else if (!strcasecmp(v->name, "encryption")) {
peer->encmethods = get_encrypt_methods(v->value);
if (!peer->encmethods) {
ast_clear_flag(peer, IAX_FORCE_ENCRYPT);
}
} else if (!strcasecmp(v->name, "forceencryption")) {
if (ast_false(v->value)) {
ast_clear_flag(peer, IAX_FORCE_ENCRYPT);
} else {
peer->encmethods = get_encrypt_methods(v->value);
if (peer->encmethods) {
ast_set_flag(peer, IAX_FORCE_ENCRYPT);
}
}
} else if (!strcasecmp(v->name, "keyrotate")) {
if (ast_false(v->value))
ast_set_flag(peer, IAX_NOKEYROTATE);
@@ -10923,7 +10945,7 @@ static struct iax2_user *build_user(const char *name, struct ast_variable *v, st
user->adsi = adsi;
ast_string_field_set(user, name, name);
ast_string_field_set(user, language, language);
ast_copy_flags(user, &globalflags, IAX_USEJITTERBUF | IAX_FORCEJITTERBUF | IAX_CODEC_USER_FIRST | IAX_CODEC_NOPREFS | IAX_CODEC_NOCAP | IAX_NOKEYROTATE);
ast_copy_flags(user, &globalflags, IAX_USEJITTERBUF | IAX_FORCEJITTERBUF | IAX_CODEC_USER_FIRST | IAX_CODEC_NOPREFS | IAX_CODEC_NOCAP | IAX_NOKEYROTATE | IAX_FORCE_ENCRYPT);
ast_clear_flag(user, IAX_HASCALLERID);
ast_string_field_set(user, cid_name, "");
ast_string_field_set(user, cid_num, "");
@@ -10969,6 +10991,18 @@ static struct iax2_user *build_user(const char *name, struct ast_variable *v, st
user->authmethods = get_auth_methods(v->value);
} else if (!strcasecmp(v->name, "encryption")) {
user->encmethods = get_encrypt_methods(v->value);
if (!user->encmethods) {
ast_clear_flag(user, IAX_FORCE_ENCRYPT);
}
} else if (!strcasecmp(v->name, "forceencryption")) {
if (ast_false(v->value)) {
ast_clear_flag(user, IAX_FORCE_ENCRYPT);
} else {
user->encmethods = get_encrypt_methods(v->value);
if (user->encmethods) {
ast_set_flag(user, IAX_FORCE_ENCRYPT);
}
}
} else if (!strcasecmp(v->name, "keyrotate")) {
if (ast_false(v->value))
ast_set_flag(user, IAX_NOKEYROTATE);
@@ -11344,11 +11378,23 @@ static int set_config(char *config_file, int reload)
ast_netsock_unref(ns);
}
}
} else if (!strcasecmp(v->name, "authdebug"))
} else if (!strcasecmp(v->name, "authdebug")) {
authdebug = ast_true(v->value);
else if (!strcasecmp(v->name, "encryption"))
iax2_encryption = get_encrypt_methods(v->value);
else if (!strcasecmp(v->name, "keyrotate")) {
} else if (!strcasecmp(v->name, "encryption")) {
iax2_encryption = get_encrypt_methods(v->value);
if (!iax2_encryption) {
ast_clear_flag((&globalflags), IAX_FORCE_ENCRYPT);
}
} else if (!strcasecmp(v->name, "forceencryption")) {
if (ast_false(v->value)) {
ast_clear_flag((&globalflags), IAX_FORCE_ENCRYPT);
} else {
iax2_encryption = get_encrypt_methods(v->value);
if (iax2_encryption) {
ast_set_flag((&globalflags), IAX_FORCE_ENCRYPT);
}
}
} else if (!strcasecmp(v->name, "keyrotate")) {
if (ast_false(v->value))
ast_set_flag((&globalflags), IAX_NOKEYROTATE);
else

5
configs/iax.conf.sample
View File

@@ -176,6 +176,11 @@ forcejitterbuffer=no
;
; encryption = yes
;
; Force encryption insures no connection is established unless both sides support
; encryption. By turning this option on, encryption is automatically turned on as well.
;
; forceencryption = yes
;
; This is a compatibility option for older versions of IAX2 that do not support
; key rotation with encryption. This option will disable the IAX_COMMAND_RTENC message.
; default is on