From 20b47a9dbf4c8299f01d0d73f112ece58da8cabb Mon Sep 17 00:00:00 2001 From: Jon Eskin Date: Wed, 4 Jan 2023 06:20:19 -0500 Subject: [PATCH] porting ssl patch to 2.0 --- Makefile | 2 +- ii.1 | 5 ++ ii.c | 156 ++++++++++++++++++++++++++++++++++++++++++------------- 3 files changed, 125 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..6de4157 100644 --- a/ii.c +++ b/ii.c @@ -20,6 +20,10 @@ #include #include +#include +#include +#include + 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 ] [-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 +435,19 @@ 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_connect(ircfd->sslHandle) != 1)) + ERR_print_errors_fp(stderr); } static int @@ -459,7 +499,7 @@ 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 +508,7 @@ 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 +600,7 @@ 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 +719,33 @@ proc_server_cmd(int fd, char *buf) channel_print(c, msg); } + +static int +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(int fd, char *buf, size_t bufsiz) +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 +760,7 @@ 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 +771,7 @@ 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 +780,7 @@ 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 +811,7 @@ setup(void) } static void -run(int ircfd, const char *host) +run(conn *ircfd, const char *host) { Channel *c, *tmp; fd_set rdset; @@ -756,9 +821,9 @@ 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 +845,7 @@ 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 +862,12 @@ 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 +891,7 @@ main(int argc, char *argv[]) break; case 'p': service = EARGF(usage()); + defaultPort = 0; break; case 's': host = EARGF(usage()); @@ -830,6 +899,11 @@ 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 +913,9 @@ 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 +930,19 @@ 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; } -- 2.39.0