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/* ISC license. */
#include <stdint.h>
#include <unistd.h>
#include <signal.h>
#include <skalibs/gccattributes.h>
#include <skalibs/types.h>
#include <skalibs/sgetopt.h>
#include <skalibs/strerr2.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/tai.h>
#include <skalibs/env.h>
#include <skalibs/sig.h>
#include <skalibs/djbunix.h>
#include <s6-networking/config.h>
#define HANDSHAKE_BANNER "SSL_PROTOCOL=TLSv1\0"
static inline void doit (int *, tain_t const *tto, uint32_t, uint32_t, unsigned int, char const *, unsigned int) gccattr_noreturn ;
#ifdef S6_NETWORKING_USE_TLS
#include <s6-networking/stls.h>
static inline void doit (int *fds, tain_t const *tto, uint32_t preoptions, uint32_t options, unsigned int verbosity, char const *servername, unsigned int notif)
{
struct tls *ctx = stls_client_init_and_handshake(fds + 2, preoptions, servername) ;
if (notif)
{
if (allwrite(notif, HANDSHAKE_BANNER, sizeof(HANDSHAKE_BANNER)) < sizeof(HANDSHAKE_BANNER))
strerr_diefu1sys(111, "write post-handshake data") ;
fd_close(notif) ;
}
stls_run(ctx, fds, tto, options, verbosity) ;
}
#else
#ifdef S6_NETWORKING_USE_BEARSSL
#include <skalibs/random.h>
#include <s6-networking/sbearssl.h>
static int handshake_cb_nop (br_ssl_engine_context *ctx, sbearssl_handshake_cb_context_t *cbarg)
{
(void)ctx ;
(void)cbarg ;
return 1 ;
}
static int handshake_cb_sendvars (br_ssl_engine_context *ctx, sbearssl_handshake_cb_context_t *cbarg)
{
if (allwrite(cbarg->notif, HANDSHAKE_BANNER, sizeof(HANDSHAKE_BANNER)) < sizeof(HANDSHAKE_BANNER))
return 0 ;
fd_close(cbarg->notif) ;
return 1 ;
}
static inline void doit (int *fds, tain_t const *tto, uint32_t preoptions, uint32_t options, unsigned int verbosity, char const *servername, unsigned int notif)
{
if (ndelay_on(fds[0]) < 0 || ndelay_on(fds[1]) < 0)
strerr_diefu1sys(111, "set local fds non-blocking") ;
if (!random_init()) strerr_diefu1sys(111, "initialize random device") ;
sbearssl_client_init_and_run(fds, tto, preoptions, options, verbosity, servername, notif ? &handshake_cb_sendvars : &handshake_cb_nop, notif) ;
}
#else
#error No SSL backend configured.
#endif
#endif
#define USAGE "s6-tlsc-io [ -v verbosity ] [ -d notif ] [ -S | -s ] [ -Y | -y ] [ -K timeout ] [ -k servername ] fdr fdw"
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv, char const *const *envp)
{
char const *servername = 0 ;
tain_t tto ;
int fds[4] = { 0, 1, 0, 1 } ;
unsigned int verbosity = 1 ;
unsigned int notif = 0 ;
uint32_t preoptions = 0 ;
uint32_t options = 1 ;
PROG = "s6-tlsc-io" ;
{
subgetopt_t l = SUBGETOPT_ZERO ;
unsigned int t = 0 ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "d:SsYyv:K:k:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 'v' : if (!uint0_scan(l.arg, &verbosity)) dieusage() ; break ;
case 'd' : if (!uint0_scan(l.arg, ¬if)) dieusage() ; break ;
case 'S' : options &= ~1 ; break ;
case 's' : options |= 1 ; break ;
case 'Y' : preoptions &= ~1 ; break ;
case 'y' : preoptions |= 1 ; break ;
case 'K' : if (!uint0_scan(l.arg, &t)) dieusage() ; break ;
case 'k' : servername = l.arg ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
if (t) tain_from_millisecs(&tto, t) ; else tto = tain_infinite_relative ;
}
if (argc < 2) dieusage() ;
{
unsigned int u ;
if (!uint0_scan(argv[0], &u)) dieusage() ;
fds[0] = u ;
if (!uint0_scan(argv[1], &u)) dieusage() ;
fds[1] = u ;
}
if (ndelay_on(0) < 0 || ndelay_on(1) < 0)
strerr_diefu1sys(111, "set stdin/stdout non-blocking") ;
if (sig_ignore(SIGPIPE) < 0) strerr_diefu1sys(111, "ignore SIGPIPE") ;
tain_now_set_stopwatch_g() ;
doit(fds, &tto, preoptions, options, verbosity, servername, notif) ;
}
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