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21f715a9 AC |
1 | /* |
2 | * Copyright (c) 2012 William Pitcock <nenolod@dereferenced.org>. | |
3 | * | |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice is present in all copies. | |
7 | * | |
8 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
9 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
10 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
11 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
12 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
13 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
14 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
15 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
16 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
17 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
18 | * POSSIBILITY OF SUCH DAMAGE. | |
19 | */ | |
20 | ||
21 | #include "stdinc.h" | |
22 | #include "client.h" | |
23 | #include "common.h" | |
24 | #include "match.h" | |
25 | #include "hash.h" | |
26 | #include "ircd.h" | |
27 | #include "numeric.h" | |
28 | #include "send.h" | |
29 | #include "msg.h" | |
30 | #include "modules.h" | |
31 | #include "sslproc.h" | |
77d3d2db | 32 | #include "s_assert.h" |
ed385364 | 33 | #include "s_serv.h" |
77d3d2db | 34 | #include "logger.h" |
21f715a9 | 35 | |
428ca87b | 36 | static int mr_starttls(struct MsgBuf *, struct Client *, struct Client *, int, const char **); |
3abc337f | 37 | static const char starttls_desc[] = "Provides the tls CAP and STARTTLS command"; |
21f715a9 AC |
38 | |
39 | struct Message starttls_msgtab = { | |
7baa37a9 | 40 | "STARTTLS", 0, 0, 0, 0, |
21f715a9 AC |
41 | {{mr_starttls, 0}, mg_ignore, mg_ignore, mg_ignore, mg_ignore, mg_ignore} |
42 | }; | |
43 | ||
44 | mapi_clist_av1 starttls_clist[] = { &starttls_msgtab, NULL }; | |
45 | ||
0416a2cc AC |
46 | unsigned int CLICAP_TLS = 0; |
47 | ||
0416a2cc | 48 | #ifdef HAVE_LIBCRYPTO |
684725ed EM |
49 | mapi_cap_list_av2 starttls_cap_list[] = { |
50 | { MAPI_CAP_CLIENT, "tls", NULL, &CLICAP_TLS }, | |
51 | { 0, NULL, NULL, NULL } | |
52 | }; | |
53 | #else /* HAVE_LIBCRYPTO */ | |
54 | mapi_cap_list_av2 starttls_cap_list[] = { { 0, NULL, NULL, NULL } }; | |
55 | #endif /* HAVE_LIBCRYPTO */ | |
0416a2cc | 56 | |
684725ed | 57 | DECLARE_MODULE_AV2(starttls, _modinit, _moddeinit, starttls_clist, NULL, NULL, starttls_cap_list, NULL, starttls_desc); |
21f715a9 AC |
58 | |
59 | static int | |
428ca87b | 60 | mr_starttls(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) |
21f715a9 AC |
61 | { |
62 | #ifdef HAVE_LIBCRYPTO | |
63 | ssl_ctl_t *ctl; | |
64 | rb_fde_t *F[2]; | |
65 | ||
66 | if (!MyConnect(client_p)) | |
67 | return 0; | |
68 | ||
2b177879 MM |
69 | if (IsSSL(client_p)) |
70 | { | |
71 | sendto_one_numeric(client_p, ERR_STARTTLS, form_str(ERR_STARTTLS), "Nested TLS handshake not allowed"); | |
72 | return 1; | |
73 | } | |
74 | ||
8ff07125 JT |
75 | if (!ssl_ok || !get_ssld_count()) |
76 | { | |
77 | sendto_one_numeric(client_p, ERR_STARTTLS, form_str(ERR_STARTTLS), "TLS is not configured"); | |
78 | return 1; | |
79 | } | |
80 | ||
21f715a9 AC |
81 | if (rb_socketpair(AF_UNIX, SOCK_STREAM, 0, &F[0], &F[1], "STARTTLS ssld session") == -1) |
82 | { | |
83 | ilog_error("error creating SSL/TLS socketpair for ssld slave"); | |
c4e81ae9 | 84 | sendto_one_numeric(client_p, ERR_STARTTLS, form_str(ERR_STARTTLS), "Unable to create SSL/TLS socketpair for ssld offload slave"); |
21f715a9 AC |
85 | return 1; |
86 | } | |
87 | ||
88 | s_assert(client_p->localClient != NULL); | |
89 | ||
90 | /* clear out any remaining plaintext lines */ | |
91 | rb_linebuf_donebuf(&client_p->localClient->buf_recvq); | |
92 | ||
93 | sendto_one_numeric(client_p, RPL_STARTTLS, form_str(RPL_STARTTLS)); | |
94 | send_queued(client_p); | |
95 | ||
96 | ctl = start_ssld_accept(client_p->localClient->F, F[1], rb_get_fd(F[0])); | |
97 | if (ctl != NULL) | |
98 | { | |
99 | client_p->localClient->F = F[0]; | |
100 | client_p->localClient->ssl_ctl = ctl; | |
101 | SetSSL(client_p); | |
102 | } | |
103 | else | |
104 | return 1; | |
105 | ||
b6e02c25 | 106 | #else |
8ff07125 | 107 | sendto_one_numeric(client_p, ERR_STARTTLS, form_str(ERR_STARTTLS), "TLS is not configured"); |
b6e02c25 | 108 | #endif |
21f715a9 AC |
109 | return 0; |
110 | } |