This one line change to the patch tells the server what domain is being
used to connect via TLS. That way the TLS server (like
<https://git.causal.agency/pounce/about/calico.1> can route the
connection using the name.
See rfc6066 for the definition and rfc8446 for extensions.
I included both the one line changed and the original one with it
patched on top for distribution on the suckless website.
---
ii.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/ii.c b/ii.c
index 8ec009e..253e302 100644
--- a/ii.c
+++ b/ii.c
@@ -444,6 +444,7 @@ tcpopen(conn *ircfd, const char *host, const char *service)
ERR_print_errors_fp(stderr);
ircfd->sslHandle = SSL_new(ircfd->sslContext);
if (!SSL_set_fd(ircfd->sslHandle, ircfd->irc) ||
+ !SSL_set_tlsext_host_name(ircfd->sslHandle, host) ||
(SSL_connect(ircfd->sslHandle) != 1))
ERR_print_errors_fp(stderr);
}
--
2.49.1
>From 069e102eadf6251ff6727c86fb9e92f83c560d38 Mon Sep 17 00:00:00 2001
From: Spenser Truex <[email protected]>
Date: Mon, 8 Sep 2025 11:39:29 -0700
Subject: [PATCH] FULL SSL patch for 2.0 with SNI fix
---
Makefile | 2 +-
ii.1 | 5 ++
ii.c | 158 ++++++++++++++++++++++++++++++++++++++++++-------------
3 files changed, 127 insertions(+), 38 deletions(-)
diff --git a/Makefile b/Makefile
index 28c7781..23db7c1 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ OBJ = $(SRC:.c=.o)
# use system flags.
II_CFLAGS = $(CFLAGS)
-II_LDFLAGS = $(LDFLAGS)
+II_LDFLAGS = $(LDFLAGS) -lssl -lcrypto
# on systems which provide strlcpy(3),
# remove NEED_STRLCPY from CPPFLAGS and
diff --git a/ii.1 b/ii.1
index 59fd798..3ddc376 100644
--- a/ii.1
+++ b/ii.1
@@ -7,6 +7,8 @@ ii - irc it or irc improved
.I host
.RB [ -p
.I port
+.RB [ \-e
+.IR ssl ]
|
.B -u
.IR sockname ]
@@ -40,6 +42,9 @@ server/host to connect to, for example: irc.freenode.net
.BI -p " port"
lets you override the default port (6667)
.TP
+.BI \-e " ssl"
+lets you connect using ssl encryption. The default ssl port is 6697.
+.TP
.BI -u " sockname"
connect to a UNIX domain socket instead of directly to a server.
If set, the
diff --git a/ii.c b/ii.c
index c402a87..385c1ab 100644
--- a/ii.c
+++ b/ii.c
@@ -20,6 +20,10 @@
#include <time.h>
#include <unistd.h>
+#include <openssl/rand.h>
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+
char *argv0;
#include "arg.h"
@@ -43,6 +47,14 @@ struct Channel {
Channel *next;
};
+typedef struct {
+ int use_ssl;
+ int irc;
+ SSL *sslHandle;
+ SSL_CTX *sslContext;
+} conn;
+
+
static Channel * channel_add(const char *);
static Channel * channel_find(const char *);
static Channel * channel_join(const char *);
@@ -57,21 +69,24 @@ static void channel_rm(Channel *);
static void cleanup(void);
static void create_dirtree(const char *);
static void create_filepath(char *, size_t, const char *, const char *,
const char *);
+static int swrite(conn *, const char *, size_t);
+static void ewritestr(conn *, const char *);
+static void handle_channels_input(conn *, Channel *);
+static void handle_server_output(conn *);
static void die(const char *, ...);
-static void ewritestr(int, const char *);
-static void handle_channels_input(int, Channel *);
-static void handle_server_output(int);
static int isnumeric(const char *);
-static void loginkey(int, const char *);
-static void loginuser(int, const char *, const char *);
-static void proc_channels_input(int, Channel *, char *);
-static void proc_channels_privmsg(int, Channel *, char *);
-static void proc_server_cmd(int, char *);
-static int read_line(int, char *, size_t);
-static void run(int, const char *);
+static void loginkey(conn *, const char *);
+static void loginuser(conn *, const char *, const char *);
+static void proc_channels_input(conn *, Channel *, char *);
+static void proc_channels_privmsg(conn *, Channel *, char *);
+static void proc_server_cmd(conn *, char *);
+static int sread(conn *, char *, size_t);
+static int read_line(conn *, char *, size_t);
+static int read_line_from_channel(int, char *, size_t);
+static void run(conn *, const char *);
static void setup(void);
static void sighandler(int);
-static int tcpopen(const char *, const char *);
+static void tcpopen(conn *ircfd, const char *, const char *);
static size_t tokenize(char **, size_t, char *, int);
static int udsopen(const char *);
static void usage(void);
@@ -102,18 +117,27 @@ static void
usage(void)
{
die("usage: %s -s host [-p port | -u sockname] [-i ircdir]\n"
- " [-n nickname] [-f fullname] [-k env_pass]\n", argv0);
+ " [-e <ssl>] [-n nickname] [-f fullname] [-k env_pass]\n", argv0);
+}
+
+static int
+swrite(conn *ircfd, const char *msg, size_t len)
+{
+ if (ircfd->use_ssl)
+ return SSL_write(ircfd->sslHandle, msg, len);
+
+ return write(ircfd->irc, msg, len);
}
static void
-ewritestr(int fd, const char *s)
+ewritestr(conn *fd, const char *s)
{
size_t len, off = 0;
int w = -1;
len = strlen(s);
for (off = 0; off < len; off += w) {
- if ((w = write(fd, s + off, len - off)) == -1)
+ if ((w = swrite(fd, s + off, len - off)) == -1)
break;
}
if (w == -1)
@@ -185,6 +209,7 @@ cleanup(void)
tmp = c->next;
channel_leave(c);
}
+
}
static void
@@ -341,14 +366,14 @@ channel_leave(Channel *c)
}
static void
-loginkey(int ircfd, const char *key)
+loginkey(conn *ircfd, const char *key)
{
snprintf(msg, sizeof(msg), "PASS %s\r\n", key);
ewritestr(ircfd, msg);
}
static void
-loginuser(int ircfd, const char *host, const char *fullname)
+loginuser(conn *ircfd, const char *host, const char *fullname)
{
snprintf(msg, sizeof(msg), "NICK %s\r\nUSER %s localhost %s :%s\r\n",
nick, nick, host, fullname);
@@ -377,12 +402,15 @@ udsopen(const char *uds)
return fd;
}
-static int
-tcpopen(const char *host, const char *service)
+static void
+tcpopen(conn *ircfd, const char *host, const char *service)
{
struct addrinfo hints, *res = NULL, *rp;
int fd = -1, e;
+ ircfd->sslHandle = NULL;
+ ircfd->sslContext = NULL;
+
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_UNSPEC; /* allow IPv4 or IPv6 */
hints.ai_flags = AI_NUMERICSERV; /* avoid name lookup for port */
@@ -407,7 +435,20 @@ tcpopen(const char *host, const char *service)
argv0, host, service, strerror(errno));
freeaddrinfo(res);
- return fd;
+ ircfd->irc = fd;
+ if (!ircfd->use_ssl)
+ return;
+
+ //SSL_load_error_strings();
+ //SSL_library_init();
+ ircfd->sslContext = SSL_CTX_new(SSLv23_client_method());
+ if (ircfd->sslContext == NULL)
+ ERR_print_errors_fp(stderr);
+ ircfd->sslHandle = SSL_new(ircfd->sslContext);
+ if (!SSL_set_fd(ircfd->sslHandle, ircfd->irc) ||
+ !SSL_set_tlsext_host_name(ircfd->sslHandle, host) ||
+ (SSL_connect(ircfd->sslHandle) != 1))
+ ERR_print_errors_fp(stderr);
}
static int
@@ -459,7 +500,7 @@ channel_print(Channel *c, const char *buf)
}
static void
-proc_channels_privmsg(int ircfd, Channel *c, char *buf)
+proc_channels_privmsg(conn *ircfd, Channel *c, char *buf)
{
snprintf(msg, sizeof(msg), "<%s> %s", nick, buf);
channel_print(c, msg);
@@ -468,7 +509,7 @@ proc_channels_privmsg(int ircfd, Channel *c, char *buf)
}
static void
-proc_channels_input(int ircfd, Channel *c, char *buf)
+proc_channels_input(conn *ircfd, Channel *c, char *buf)
{
char *p = NULL;
size_t buflen;
@@ -560,7 +601,7 @@ proc_channels_input(int ircfd, Channel *c, char *buf)
}
static void
-proc_server_cmd(int fd, char *buf)
+proc_server_cmd(conn *fd, char *buf)
{
Channel *c;
const char *channel;
@@ -679,8 +720,33 @@ proc_server_cmd(int fd, char *buf)
channel_print(c, msg);
}
+
static int
-read_line(int fd, char *buf, size_t bufsiz)
+sread(conn *fd, char *buf, size_t bufsize)
+{
+ if (fd->use_ssl)
+ return SSL_read(fd->sslHandle, buf, bufsize);
+
+ return read(fd->irc, buf, bufsize);
+}
+
+static int
+read_line(conn *fd, char *buf, size_t bufsiz)
+{
+ size_t i = 0;
+ char c = '\0';
+
+ do {
+ if (sread(fd, &c, sizeof(char)) != sizeof(char))
+ return -1;
+ buf[i++] = c;
+ } while (c != '\n' && i < bufsiz);
+ buf[i - 1] = '\0'; /* eliminates '\n' */
+ return 0;
+}
+
+static int
+read_line_from_channel(int fd, char *buf, size_t bufsiz)
{
size_t i = 0;
char c = '\0';
@@ -695,7 +761,7 @@ read_line(int fd, char *buf, size_t bufsiz)
}
static void
-handle_channels_input(int ircfd, Channel *c)
+handle_channels_input(conn *ircfd, Channel *c)
{
/*
* Do not allow to read this fully, since commands will be
@@ -706,7 +772,7 @@ handle_channels_input(int ircfd, Channel *c)
*/
char buf[IRC_MSG_MAX-64];
- if (read_line(c->fdin, buf, sizeof(buf)) == -1) {
+ if (read_line_from_channel(c->fdin, buf, sizeof(buf)) == -1) {
if (channel_reopen(c) == -1)
channel_rm(c);
return;
@@ -715,7 +781,7 @@ handle_channels_input(int ircfd, Channel *c)
}
static void
-handle_server_output(int ircfd)
+handle_server_output(conn *ircfd)
{
char buf[IRC_MSG_MAX];
@@ -746,7 +812,7 @@ setup(void)
}
static void
-run(int ircfd, const char *host)
+run(conn *ircfd, const char *host)
{
Channel *c, *tmp;
fd_set rdset;
@@ -756,9 +822,9 @@ run(int ircfd, const char *host)
snprintf(ping_msg, sizeof(ping_msg), "PING %s\r\n", host);
while (isrunning) {
- maxfd = ircfd;
+ maxfd = ircfd->irc;
FD_ZERO(&rdset);
- FD_SET(ircfd, &rdset);
+ FD_SET(ircfd->irc, &rdset);
for (c = channels; c; c = c->next) {
if (c->fdin > maxfd)
maxfd = c->fdin;
@@ -780,7 +846,7 @@ run(int ircfd, const char *host)
ewritestr(ircfd, ping_msg);
continue;
}
- if (FD_ISSET(ircfd, &rdset)) {
+ if (FD_ISSET(ircfd->irc, &rdset)) {
handle_server_output(ircfd);
last_response = time(NULL);
}
@@ -797,9 +863,12 @@ main(int argc, char *argv[])
{
struct passwd *spw;
const char *key = NULL, *fullname = NULL, *host = "";
- const char *uds = NULL, *service = "6667";
+ const char *uds = NULL;
+ const char *service = "6667";
+ const char *sservice = "6697";
char prefix[PATH_MAX];
- int ircfd, r;
+ int r, defaultPort = 1;
+ conn ircfd;
/* use nickname and home dir of user by default */
if (!(spw = getpwuid(getuid())))
@@ -823,6 +892,7 @@ main(int argc, char *argv[])
break;
case 'p':
service = EARGF(usage());
+ defaultPort = 0;
break;
case 's':
host = EARGF(usage());
@@ -830,6 +900,11 @@ main(int argc, char *argv[])
case 'u':
uds = EARGF(usage());
break;
+ case 'e':
+ if (defaultPort)
+ service = sservice;
+ ircfd.use_ssl = 1;
+ break;
default:
usage();
break;
@@ -839,9 +914,9 @@ main(int argc, char *argv[])
usage();
if (uds)
- ircfd = udsopen(uds);
+ ircfd.irc = udsopen(uds);
else
- ircfd = tcpopen(host, service);
+ tcpopen(&ircfd, host, service);
#ifdef __OpenBSD__
/* OpenBSD pledge(2) support */
@@ -856,11 +931,20 @@ main(int argc, char *argv[])
channelmaster = channel_add(""); /* master channel */
if (key)
- loginkey(ircfd, key);
- loginuser(ircfd, host, fullname && *fullname ? fullname : nick);
+ loginkey(&ircfd, key);
+ loginuser(&ircfd, host, fullname && *fullname ? fullname : nick);
setup();
- run(ircfd, host);
+ run(&ircfd, host);
cleanup();
+ if (ircfd.use_ssl) {
+ SSL_shutdown(ircfd.sslHandle);
+ SSL_free(ircfd.sslHandle);
+ SSL_CTX_free(ircfd.sslContext);
+ }
+
+ close(ircfd.irc);
+
return 0;
}
+
--
2.49.1
--
CAEE B377 FC82 BAF9 102C D22F C5CE D003 1AA8 E281
Spenser Truex https://equwal.com
