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/* ISC license. */
#include <stdlib.h>
#include <tls.h>
#include <skalibs/strerr2.h>
#include <s6-networking/stls.h>
#include "stls-internal.h"
#define diecfg(cfg, s) strerr_diefu3x(96, (s), ": ", tls_config_error(cfg))
#define diectx(e, ctx, s) strerr_diefu3x(e, (s), ": ", tls_error(ctx))
struct tls *stls_client_init_and_handshake (int const *fds, tain_t const *tto, uint32_t preoptions, char const *servername)
{
struct tls *ctx ;
struct tls_config *cfg ;
char const *x ;
if (tls_init() < 0) strerr_diefu1sys(111, "tls_init") ;
cfg = tls_config_new() ;
if (!cfg) strerr_diefu1sys(111, "tls_config_new") ;
if (preoptions & 1)
{
x = getenv("CERTFILE") ;
if (!x) strerr_dienotset(100, "CERTFILE") ;
if (tls_config_set_cert_file(cfg, x) < 0)
diecfg(cfg, "tls_config_set_cert_file") ;
x = getenv("KEYFILE") ;
if (!x) strerr_dienotset(100, "KEYFILE") ;
if (tls_config_set_key_file(cfg, x) < 0)
diecfg(cfg, "tls_config_set_key_file") ;
}
stls_drop() ;
x = getenv("CAFILE") ;
if (x)
{
if (tls_config_set_ca_file(cfg, x) < 0)
diecfg(cfg, "tls_config_set_ca_file") ;
}
else
{
x = getenv("CADIR") ;
if (x)
{
if (tls_config_set_ca_path(cfg, x) < 0)
diecfg(cfg, "tls_config_set_ca_path") ;
strerr_warnw1x("some versions of libtls do not work with CADIR, try using CAFILE instead") ;
}
else strerr_diefu1x(100, "get trust anchor list: neither CADIR nor CAFILE is set") ;
}
if (tls_config_set_ciphers(cfg, "secure") < 0)
diecfg(cfg, "tls_config_set_ciphers") ;
if (tls_config_set_dheparams(cfg, "auto") < 0)
diecfg(cfg, "tls_config_set_dheparams") ;
if (tls_config_set_ecdhecurve(cfg, "auto") < 0)
diecfg(cfg, "tls_config_set_ecdhecurve") ;
tls_config_verify(cfg) ;
tls_config_set_protocols(cfg, TLS_PROTOCOLS_ALL) ;
tls_config_prefer_ciphers_server(cfg) ;
if (!servername) tls_config_insecure_noverifyname(cfg) ;
ctx = tls_client() ;
if (!ctx) strerr_diefu1sys(111, "tls_client") ;
if (tls_configure(ctx, cfg) < 0) diectx(97, ctx, "tls_configure") ;
if (tls_connect_fds(ctx, fds[0], fds[1], servername) < 0)
diectx(97, ctx, "tls_connect_fds") ;
tls_config_free(cfg) ;
stls_handshake(ctx, tto) ;
return ctx ;
}
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