Prepare for 2.4.2.0; implement client certificates with bearssl

 Also send a bit more environment with libtls

15 files changed, 225 insertions, 91 deletions

diff --git a/NEWS b/NEWS
index bec55c2..0aa7b52 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,11 @@
 Changelog for s6-networking.
 
+In 2.4.2.0
+----------
+
+ - Actual server-side support for client certificates with BearSSL
+
+
 In 2.4.1.1
 ----------
 
diff --git a/doc/index.html b/doc/index.html
index 727b9e9..221a65b 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -91,7 +91,7 @@ run-time requirement if you link against its shared version. </li>
 
 <ul>
  <li> The current released version of s6-networking is
-<a href="s6-networking-2.4.1.1.tar.gz">2.4.1.1</a>. </li>
+<a href="s6-networking-2.4.2.0.tar.gz">2.4.2.0</a>. </li>
  <li> Alternatively, you can checkout a copy of the
 <a href="//git.skarnet.org/cgi-bin/cgit.cgi/s6-networking/">s6-networking
 git repository</a>:
diff --git a/doc/s6-tlsd-io.html b/doc/s6-tlsd-io.html
index 807c982..29f75c3 100644
--- a/doc/s6-tlsd-io.html
+++ b/doc/s6-tlsd-io.html
@@ -188,8 +188,10 @@ no effect. </li>
 and break the connection when receiving a local EOF. </li>
  <li> <tt>-s</tt>&nbsp;: transmit EOF by half-closing the TCP
 connection without using <tt>close_notify</tt>. This is the default. </li>
- <li> <tt>-Y</tt>&nbsp;: Do not send a client certificate. This is the default. </li>
- <li> <tt>-y</tt>&nbsp;: Send a client certificate. </li>
+ <li> <tt>-Y</tt>&nbsp;: Require an optional client certificate. </li>
+ <li> <tt>-y</tt>&nbsp;: Require a mandatory client certificate.
+The default, with neither the <tt>-Y</tt> nor the <tt>-y</tt> option,
+is not to require a client certificate at all. </li>
  <li> <tt>-K&nbsp;<em>kimeout</em></tt>&nbsp;: if the peer fails
 to send data for <em>kimeout</em> milliseconds during the handshake,
 close the connection. The default is 0, which means infinite timeout
diff --git a/doc/upgrade.html b/doc/upgrade.html
index 400c014..f174e74 100644
--- a/doc/upgrade.html
+++ b/doc/upgrade.html
@@ -18,7 +18,14 @@
 
 <h1> What has changed in s6-networking </h1>
 
-<h2> in 2.4.1.0 </h2>
+<h2> in 2.4.2.0 </h2>
+
+<ul>
+ <li> Client certificates are now properly supported in
+<a href="s6-tlsd-io.html">s6-tlsd-io</a>. </li>
+</ul>
+
+<h2> in 2.4.1.1 </h2>
 
 <ul>
  <li> <a href="//skarnet.org/software/skalibs/">skalibs</a>
diff --git a/package/deps.mak b/package/deps.mak
index 145adca..472b9fd 100644
--- a/package/deps.mak
+++ b/package/deps.mak
@@ -40,6 +40,8 @@ src/sbearssl/sbearssl_ec_pkey_to.o src/sbearssl/sbearssl_ec_pkey_to.lo: src/sbea
 src/sbearssl/sbearssl_ec_skey_from.o src/sbearssl/sbearssl_ec_skey_from.lo: src/sbearssl/sbearssl_ec_skey_from.c src/include/s6-networking/sbearssl.h
 src/sbearssl/sbearssl_ec_skey_to.o src/sbearssl/sbearssl_ec_skey_to.lo: src/sbearssl/sbearssl_ec_skey_to.c src/include/s6-networking/sbearssl.h
 src/sbearssl/sbearssl_error_str.o src/sbearssl/sbearssl_error_str.lo: src/sbearssl/sbearssl_error_str.c src/include/s6-networking/sbearssl.h
+src/sbearssl/sbearssl_get_keycert.o src/sbearssl/sbearssl_get_keycert.lo: src/sbearssl/sbearssl_get_keycert.c src/include/s6-networking/sbearssl.h src/sbearssl/sbearssl-internal.h
+src/sbearssl/sbearssl_get_tas.o src/sbearssl/sbearssl_get_tas.lo: src/sbearssl/sbearssl_get_tas.c src/include/s6-networking/sbearssl.h src/sbearssl/sbearssl-internal.h
 src/sbearssl/sbearssl_isder.o src/sbearssl/sbearssl_isder.lo: src/sbearssl/sbearssl_isder.c src/include/s6-networking/sbearssl.h
 src/sbearssl/sbearssl_pem_decode_from_buffer.o src/sbearssl/sbearssl_pem_decode_from_buffer.lo: src/sbearssl/sbearssl_pem_decode_from_buffer.c src/include/s6-networking/sbearssl.h src/sbearssl/sbearssl-internal.h
 src/sbearssl/sbearssl_pem_decode_from_string.o src/sbearssl/sbearssl_pem_decode_from_string.lo: src/sbearssl/sbearssl_pem_decode_from_string.c src/include/s6-networking/sbearssl.h src/sbearssl/sbearssl-internal.h
@@ -67,6 +69,7 @@ src/sbearssl/sbearssl_ta_readfile.o src/sbearssl/sbearssl_ta_readfile.lo: src/sb
 src/sbearssl/sbearssl_ta_to.o src/sbearssl/sbearssl_ta_to.lo: src/sbearssl/sbearssl_ta_to.c src/include/s6-networking/sbearssl.h
 src/sbearssl/sbearssl_x500_from_ta.o src/sbearssl/sbearssl_x500_from_ta.lo: src/sbearssl/sbearssl_x500_from_ta.c src/include/s6-networking/sbearssl.h
 src/sbearssl/sbearssl_x500_name_len.o src/sbearssl/sbearssl_x500_name_len.lo: src/sbearssl/sbearssl_x500_name_len.c src/include/s6-networking/sbearssl.h
+src/sbearssl/sbearssl_x509_minimal_init_with_engine.o src/sbearssl/sbearssl_x509_minimal_init_with_engine.lo: src/sbearssl/sbearssl_x509_minimal_init_with_engine.c src/include/s6-networking/sbearssl.h
 src/sbearssl/sbearssl_x509_minimal_set_tai.o src/sbearssl/sbearssl_x509_minimal_set_tai.lo: src/sbearssl/sbearssl_x509_minimal_set_tai.c src/include/s6-networking/sbearssl.h
 src/stls/stls_client_init_and_handshake.o src/stls/stls_client_init_and_handshake.lo: src/stls/stls_client_init_and_handshake.c src/include/s6-networking/stls.h src/stls/stls-internal.h
 src/stls/stls_drop.o src/stls/stls_drop.lo: src/stls/stls_drop.c src/stls/stls-internal.h
@@ -129,12 +132,12 @@ libs6net.so.xyzzy: src/libs6net/s6net_ident_client.lo src/libs6net/s6net_ident_r
 minidentd: EXTRA_LIBS := -lskarnet ${MAYBEPTHREAD_LIB} ${SOCKET_LIB} ${SYSCLOCK_LIB}
 minidentd: src/minidentd/minidentd.o src/minidentd/mgetuid.o ${LIBNSSS}
 ifeq ($(strip $(STATIC_LIBS_ARE_PIC)),)
-libsbearssl.a.xyzzy: src/sbearssl/sbearssl_append.o src/sbearssl/sbearssl_cert_from.o src/sbearssl/sbearssl_cert_readbigpem.o src/sbearssl/sbearssl_cert_readfile.o src/sbearssl/sbearssl_cert_to.o src/sbearssl/sbearssl_client_init_and_run.o src/sbearssl/sbearssl_drop.o src/sbearssl/sbearssl_ec_issuer_keytype.o src/sbearssl/sbearssl_ec_pkey_from.o src/sbearssl/sbearssl_ec_pkey_to.o src/sbearssl/sbearssl_ec_skey_from.o src/sbearssl/sbearssl_ec_skey_to.o src/sbearssl/sbearssl_error_str.o src/sbearssl/sbearssl_isder.o src/sbearssl/sbearssl_pem_decode_from_buffer.o src/sbearssl/sbearssl_pem_decode_from_string.o src/sbearssl/sbearssl_pem_push.o src/sbearssl/sbearssl_pkey_from.o src/sbearssl/sbearssl_pkey_to.o src/sbearssl/sbearssl_rsa_pkey_from.o src/sbearssl/sbearssl_rsa_pkey_to.o src/sbearssl/sbearssl_rsa_skey_from.o src/sbearssl/sbearssl_rsa_skey_to.o src/sbearssl/sbearssl_run.o src/sbearssl/sbearssl_send_environment.o src/sbearssl/sbearssl_server_init_and_run.o src/sbearssl/sbearssl_skey_from.o src/sbearssl/sbearssl_skey_readfile.o src/sbearssl/sbearssl_skey_to.o src/sbearssl/sbearssl_suite_bits.o src/sbearssl/sbearssl_suite_list.o src/sbearssl/sbearssl_suite_name.o src/sbearssl/sbearssl_ta_cert.o src/sbearssl/sbearssl_ta_certs.o src/sbearssl/sbearssl_ta_from.o src/sbearssl/sbearssl_ta_readdir.o src/sbearssl/sbearssl_ta_readfile.o src/sbearssl/sbearssl_ta_to.o src/sbearssl/sbearssl_x500_name_len.o src/sbearssl/sbearssl_x500_from_ta.o src/sbearssl/sbearssl_x509_minimal_set_tai.o
+libsbearssl.a.xyzzy: src/sbearssl/sbearssl_append.o src/sbearssl/sbearssl_cert_from.o src/sbearssl/sbearssl_cert_readbigpem.o src/sbearssl/sbearssl_cert_readfile.o src/sbearssl/sbearssl_cert_to.o src/sbearssl/sbearssl_client_init_and_run.o src/sbearssl/sbearssl_drop.o src/sbearssl/sbearssl_ec_issuer_keytype.o src/sbearssl/sbearssl_ec_pkey_from.o src/sbearssl/sbearssl_ec_pkey_to.o src/sbearssl/sbearssl_ec_skey_from.o src/sbearssl/sbearssl_ec_skey_to.o src/sbearssl/sbearssl_error_str.o src/sbearssl/sbearssl_get_keycert.o src/sbearssl/sbearssl_get_tas.o src/sbearssl/sbearssl_isder.o src/sbearssl/sbearssl_pem_decode_from_buffer.o src/sbearssl/sbearssl_pem_decode_from_string.o src/sbearssl/sbearssl_pem_push.o src/sbearssl/sbearssl_pkey_from.o src/sbearssl/sbearssl_pkey_to.o src/sbearssl/sbearssl_rsa_pkey_from.o src/sbearssl/sbearssl_rsa_pkey_to.o src/sbearssl/sbearssl_rsa_skey_from.o src/sbearssl/sbearssl_rsa_skey_to.o src/sbearssl/sbearssl_run.o src/sbearssl/sbearssl_send_environment.o src/sbearssl/sbearssl_server_init_and_run.o src/sbearssl/sbearssl_skey_from.o src/sbearssl/sbearssl_skey_readfile.o src/sbearssl/sbearssl_skey_to.o src/sbearssl/sbearssl_suite_bits.o src/sbearssl/sbearssl_suite_list.o src/sbearssl/sbearssl_suite_name.o src/sbearssl/sbearssl_ta_cert.o src/sbearssl/sbearssl_ta_certs.o src/sbearssl/sbearssl_ta_from.o src/sbearssl/sbearssl_ta_readdir.o src/sbearssl/sbearssl_ta_readfile.o src/sbearssl/sbearssl_ta_to.o src/sbearssl/sbearssl_x500_name_len.o src/sbearssl/sbearssl_x500_from_ta.o src/sbearssl/sbearssl_x509_minimal_init_with_engine.o src/sbearssl/sbearssl_x509_minimal_set_tai.o
 else
-libsbearssl.a.xyzzy: src/sbearssl/sbearssl_append.lo src/sbearssl/sbearssl_cert_from.lo src/sbearssl/sbearssl_cert_readbigpem.lo src/sbearssl/sbearssl_cert_readfile.lo src/sbearssl/sbearssl_cert_to.lo src/sbearssl/sbearssl_client_init_and_run.lo src/sbearssl/sbearssl_drop.lo src/sbearssl/sbearssl_ec_issuer_keytype.lo src/sbearssl/sbearssl_ec_pkey_from.lo src/sbearssl/sbearssl_ec_pkey_to.lo src/sbearssl/sbearssl_ec_skey_from.lo src/sbearssl/sbearssl_ec_skey_to.lo src/sbearssl/sbearssl_error_str.lo src/sbearssl/sbearssl_isder.lo src/sbearssl/sbearssl_pem_decode_from_buffer.lo src/sbearssl/sbearssl_pem_decode_from_string.lo src/sbearssl/sbearssl_pem_push.lo src/sbearssl/sbearssl_pkey_from.lo src/sbearssl/sbearssl_pkey_to.lo src/sbearssl/sbearssl_rsa_pkey_from.lo src/sbearssl/sbearssl_rsa_pkey_to.lo src/sbearssl/sbearssl_rsa_skey_from.lo src/sbearssl/sbearssl_rsa_skey_to.lo src/sbearssl/sbearssl_run.lo src/sbearssl/sbearssl_send_environment.lo src/sbearssl/sbearssl_server_init_and_run.lo src/sbearssl/sbearssl_skey_from.lo src/sbearssl/sbearssl_skey_readfile.lo src/sbearssl/sbearssl_skey_to.lo src/sbearssl/sbearssl_suite_bits.lo src/sbearssl/sbearssl_suite_list.lo src/sbearssl/sbearssl_suite_name.lo src/sbearssl/sbearssl_ta_cert.lo src/sbearssl/sbearssl_ta_certs.lo src/sbearssl/sbearssl_ta_from.lo src/sbearssl/sbearssl_ta_readdir.lo src/sbearssl/sbearssl_ta_readfile.lo src/sbearssl/sbearssl_ta_to.lo src/sbearssl/sbearssl_x500_name_len.lo src/sbearssl/sbearssl_x500_from_ta.lo src/sbearssl/sbearssl_x509_minimal_set_tai.lo
+libsbearssl.a.xyzzy: src/sbearssl/sbearssl_append.lo src/sbearssl/sbearssl_cert_from.lo src/sbearssl/sbearssl_cert_readbigpem.lo src/sbearssl/sbearssl_cert_readfile.lo src/sbearssl/sbearssl_cert_to.lo src/sbearssl/sbearssl_client_init_and_run.lo src/sbearssl/sbearssl_drop.lo src/sbearssl/sbearssl_ec_issuer_keytype.lo src/sbearssl/sbearssl_ec_pkey_from.lo src/sbearssl/sbearssl_ec_pkey_to.lo src/sbearssl/sbearssl_ec_skey_from.lo src/sbearssl/sbearssl_ec_skey_to.lo src/sbearssl/sbearssl_error_str.lo src/sbearssl/sbearssl_get_keycert.lo src/sbearssl/sbearssl_get_tas.lo src/sbearssl/sbearssl_isder.lo src/sbearssl/sbearssl_pem_decode_from_buffer.lo src/sbearssl/sbearssl_pem_decode_from_string.lo src/sbearssl/sbearssl_pem_push.lo src/sbearssl/sbearssl_pkey_from.lo src/sbearssl/sbearssl_pkey_to.lo src/sbearssl/sbearssl_rsa_pkey_from.lo src/sbearssl/sbearssl_rsa_pkey_to.lo src/sbearssl/sbearssl_rsa_skey_from.lo src/sbearssl/sbearssl_rsa_skey_to.lo src/sbearssl/sbearssl_run.lo src/sbearssl/sbearssl_send_environment.lo src/sbearssl/sbearssl_server_init_and_run.lo src/sbearssl/sbearssl_skey_from.lo src/sbearssl/sbearssl_skey_readfile.lo src/sbearssl/sbearssl_skey_to.lo src/sbearssl/sbearssl_suite_bits.lo src/sbearssl/sbearssl_suite_list.lo src/sbearssl/sbearssl_suite_name.lo src/sbearssl/sbearssl_ta_cert.lo src/sbearssl/sbearssl_ta_certs.lo src/sbearssl/sbearssl_ta_from.lo src/sbearssl/sbearssl_ta_readdir.lo src/sbearssl/sbearssl_ta_readfile.lo src/sbearssl/sbearssl_ta_to.lo src/sbearssl/sbearssl_x500_name_len.lo src/sbearssl/sbearssl_x500_from_ta.lo src/sbearssl/sbearssl_x509_minimal_init_with_engine.lo src/sbearssl/sbearssl_x509_minimal_set_tai.lo
 endif
 libsbearssl.so.xyzzy: EXTRA_LIBS := -lbearssl -lskarnet
-libsbearssl.so.xyzzy: src/sbearssl/sbearssl_append.lo src/sbearssl/sbearssl_cert_from.lo src/sbearssl/sbearssl_cert_readbigpem.lo src/sbearssl/sbearssl_cert_readfile.lo src/sbearssl/sbearssl_cert_to.lo src/sbearssl/sbearssl_client_init_and_run.lo src/sbearssl/sbearssl_drop.lo src/sbearssl/sbearssl_ec_issuer_keytype.lo src/sbearssl/sbearssl_ec_pkey_from.lo src/sbearssl/sbearssl_ec_pkey_to.lo src/sbearssl/sbearssl_ec_skey_from.lo src/sbearssl/sbearssl_ec_skey_to.lo src/sbearssl/sbearssl_error_str.lo src/sbearssl/sbearssl_isder.lo src/sbearssl/sbearssl_pem_decode_from_buffer.lo src/sbearssl/sbearssl_pem_decode_from_string.lo src/sbearssl/sbearssl_pem_push.lo src/sbearssl/sbearssl_pkey_from.lo src/sbearssl/sbearssl_pkey_to.lo src/sbearssl/sbearssl_rsa_pkey_from.lo src/sbearssl/sbearssl_rsa_pkey_to.lo src/sbearssl/sbearssl_rsa_skey_from.lo src/sbearssl/sbearssl_rsa_skey_to.lo src/sbearssl/sbearssl_run.lo src/sbearssl/sbearssl_send_environment.lo src/sbearssl/sbearssl_server_init_and_run.lo src/sbearssl/sbearssl_skey_from.lo src/sbearssl/sbearssl_skey_readfile.lo src/sbearssl/sbearssl_skey_to.lo src/sbearssl/sbearssl_suite_bits.lo src/sbearssl/sbearssl_suite_list.lo src/sbearssl/sbearssl_suite_name.lo src/sbearssl/sbearssl_ta_cert.lo src/sbearssl/sbearssl_ta_certs.lo src/sbearssl/sbearssl_ta_from.lo src/sbearssl/sbearssl_ta_readdir.lo src/sbearssl/sbearssl_ta_readfile.lo src/sbearssl/sbearssl_ta_to.lo src/sbearssl/sbearssl_x500_name_len.lo src/sbearssl/sbearssl_x500_from_ta.lo src/sbearssl/sbearssl_x509_minimal_set_tai.lo
+libsbearssl.so.xyzzy: src/sbearssl/sbearssl_append.lo src/sbearssl/sbearssl_cert_from.lo src/sbearssl/sbearssl_cert_readbigpem.lo src/sbearssl/sbearssl_cert_readfile.lo src/sbearssl/sbearssl_cert_to.lo src/sbearssl/sbearssl_client_init_and_run.lo src/sbearssl/sbearssl_drop.lo src/sbearssl/sbearssl_ec_issuer_keytype.lo src/sbearssl/sbearssl_ec_pkey_from.lo src/sbearssl/sbearssl_ec_pkey_to.lo src/sbearssl/sbearssl_ec_skey_from.lo src/sbearssl/sbearssl_ec_skey_to.lo src/sbearssl/sbearssl_error_str.lo src/sbearssl/sbearssl_get_keycert.lo src/sbearssl/sbearssl_get_tas.lo src/sbearssl/sbearssl_isder.lo src/sbearssl/sbearssl_pem_decode_from_buffer.lo src/sbearssl/sbearssl_pem_decode_from_string.lo src/sbearssl/sbearssl_pem_push.lo src/sbearssl/sbearssl_pkey_from.lo src/sbearssl/sbearssl_pkey_to.lo src/sbearssl/sbearssl_rsa_pkey_from.lo src/sbearssl/sbearssl_rsa_pkey_to.lo src/sbearssl/sbearssl_rsa_skey_from.lo src/sbearssl/sbearssl_rsa_skey_to.lo src/sbearssl/sbearssl_run.lo src/sbearssl/sbearssl_send_environment.lo src/sbearssl/sbearssl_server_init_and_run.lo src/sbearssl/sbearssl_skey_from.lo src/sbearssl/sbearssl_skey_readfile.lo src/sbearssl/sbearssl_skey_to.lo src/sbearssl/sbearssl_suite_bits.lo src/sbearssl/sbearssl_suite_list.lo src/sbearssl/sbearssl_suite_name.lo src/sbearssl/sbearssl_ta_cert.lo src/sbearssl/sbearssl_ta_certs.lo src/sbearssl/sbearssl_ta_from.lo src/sbearssl/sbearssl_ta_readdir.lo src/sbearssl/sbearssl_ta_readfile.lo src/sbearssl/sbearssl_ta_to.lo src/sbearssl/sbearssl_x500_name_len.lo src/sbearssl/sbearssl_x500_from_ta.lo src/sbearssl/sbearssl_x509_minimal_init_with_engine.lo src/sbearssl/sbearssl_x509_minimal_set_tai.lo
 ifeq ($(strip $(STATIC_LIBS_ARE_PIC)),)
 libstls.a.xyzzy: src/stls/stls_drop.o src/stls/stls_handshake.o src/stls/stls_run.o src/stls/stls_client_init_and_handshake.o src/stls/stls_server_init_and_handshake.o src/stls/stls_send_environment.o
 else
diff --git a/package/info b/package/info
index 9f79b32..342e4dd 100644
--- a/package/info
+++ b/package/info
@@ -1,4 +1,4 @@
 package=s6-networking
-version=2.4.1.1
+version=2.4.2.0
 category=net
 package_macro_name=S6_NETWORKING
diff --git a/src/include/s6-networking/sbearssl.h b/src/include/s6-networking/sbearssl.h
index 5527696..e473e12 100644
--- a/src/include/s6-networking/sbearssl.h
+++ b/src/include/s6-networking/sbearssl.h
@@ -30,8 +30,13 @@
  /* Utility functions */
 
 extern int sbearssl_isder (unsigned char const *, size_t) ;
+
+
+ /* x509 QoL functions */
+
 extern int sbearssl_x509_minimal_set_tai (br_x509_minimal_context *, tai_t const *) ;
 #define sbearssl_x509_minimal_set_tain(ctx, a) sbearssl_x509_minimal_set_tai(ctx, tain_secp(a))
+extern void sbearssl_x509_minimal_init_with_engine (br_x509_minimal_context *, br_ssl_engine_context *, br_x509_trust_anchor const *, size_t) ;
 
 
  /* Cipher suites */
diff --git a/src/sbearssl/deps-lib/sbearssl b/src/sbearssl/deps-lib/sbearssl
index dfa4f29..a1ccbb7 100644
--- a/src/sbearssl/deps-lib/sbearssl
+++ b/src/sbearssl/deps-lib/sbearssl
@@ -11,6 +11,8 @@ sbearssl_ec_pkey_to.o
 sbearssl_ec_skey_from.o
 sbearssl_ec_skey_to.o
 sbearssl_error_str.o
+sbearssl_get_keycert.o
+sbearssl_get_tas.o
 sbearssl_isder.o
 sbearssl_pem_decode_from_buffer.o
 sbearssl_pem_decode_from_string.o
@@ -38,6 +40,7 @@ sbearssl_ta_readfile.o
 sbearssl_ta_to.o
 sbearssl_x500_name_len.o
 sbearssl_x500_from_ta.o
+sbearssl_x509_minimal_init_with_engine.o
 sbearssl_x509_minimal_set_tai.o
 -lbearssl
 -lskarnet
diff --git a/src/sbearssl/sbearssl-internal.h b/src/sbearssl/sbearssl-internal.h
index bfaad73..21a28d7 100644
--- a/src/sbearssl/sbearssl-internal.h
+++ b/src/sbearssl/sbearssl-internal.h
@@ -65,6 +65,9 @@ struct sbearssl_suiteinfo_s
   uint16_t bits ;
 } ;
 
+extern size_t sbearssl_get_tas (genalloc *, stralloc *) ;
+extern size_t sbearssl_get_keycert (sbearssl_skey *, genalloc *, stralloc *) ;
+
 extern void sbearssl_drop (void) ;
 extern void sbearssl_append (void *, void const *, size_t) ;
 extern int sbearssl_pem_push (br_pem_decoder_context *, char const *, size_t, sbearssl_pemobject *, genalloc *, sbearssl_strallocerr *, int *) ;
diff --git a/src/sbearssl/sbearssl_client_init_and_run.c b/src/sbearssl/sbearssl_client_init_and_run.c
index d7bedec..db68096 100644
--- a/src/sbearssl/sbearssl_client_init_and_run.c
+++ b/src/sbearssl/sbearssl_client_init_and_run.c
@@ -15,50 +15,64 @@
 
 void sbearssl_client_init_and_run (int *fds, tain_t const *tto, uint32_t preoptions, uint32_t options, unsigned int verbosity, char const *servername, sbearssl_handshake_cb_t_ref cb, unsigned int notif)
 {
+  sbearssl_skey skey ;
+  genalloc certs = GENALLOC_ZERO ;  /* sbearssl_cert */
+  genalloc tas = GENALLOC_ZERO ;  /* sbearssl_ta */
   stralloc storage = STRALLOC_ZERO ;
-  genalloc tas = GENALLOC_ZERO ;
-  size_t talen ;
-
-  if (preoptions & 1)
-    strerr_dief1x(100, "client certificates are not supported yet") ;
-
-  {
-    int r ;
-    char const *x = getenv("CADIR") ;
-    if (x)
-      r = sbearssl_ta_readdir(x, &tas, &storage) ;
-    else
-    {
-      x = getenv("CAFILE") ;
-      if (!x) strerr_dienotset(100, "CADIR or CAFILE") ;
-      r = sbearssl_ta_readfile(x, &tas, &storage) ;
-    }
-
-    if (r < 0)
-      strerr_diefu2sys(111, "read trust anchors in ", x) ;
-    else if (r)
-      strerr_diefu4x(96, "read trust anchors in ", x, ": ", sbearssl_error_str(r)) ;
-
-    talen = genalloc_len(sbearssl_ta, &tas) ;
-    if (!talen)
-      strerr_dief2x(96, "no trust anchor found in ", x) ;
-  }
+  size_t chainlen = preoptions & 1 ? sbearssl_get_keycert(&skey, &certs, &storage) : 0 ;
+  size_t n = sbearssl_get_tas(&tas, &storage) ;
 
   sbearssl_drop() ;
+  stralloc_shrink(&storage) ;
 
   {
     sbearssl_handshake_cb_context_t cbarg = { .notif = notif } ;
-    unsigned char buf[BR_SSL_BUFSIZE_BIDI] ;
-    br_x509_minimal_context xc ;
+    union br_skey_u key ;
     br_ssl_client_context cc ;
-    br_x509_trust_anchor btas[talen] ;
-    size_t i = talen ;
+    br_x509_minimal_context xc ;
+    br_x509_certificate chain[chainlen ? chainlen : 1] ;
+    br_x509_trust_anchor btas[n] ;
+    unsigned char buf[BR_SSL_BUFSIZE_BIDI] ;
+
+    for (size_t i = 0 ; i < chainlen ; i++)
+      sbearssl_cert_to(genalloc_s(sbearssl_cert, &certs) + i, chain + i, storage.s) ;
+    genalloc_free(sbearssl_cert, &certs) ;
 
-    stralloc_shrink(&storage) ;
-    while (i--)
+    for (size_t i = 0 ; i < n ; i++)
       sbearssl_ta_to(genalloc_s(sbearssl_ta, &tas) + i, btas + i, storage.s) ;
     genalloc_free(sbearssl_ta, &tas) ;
-    br_ssl_client_init_full(&cc, &xc, btas, talen) ;
+
+    br_ssl_client_init_full(&cc, &xc, btas, n) ;
+
+    if (chainlen)
+    {
+      switch (skey.type)
+      {
+        case BR_KEYTYPE_RSA :
+          sbearssl_rsa_skey_to(&skey.data.rsa, &key.rsa, storage.s) ;
+          br_ssl_client_set_single_rsa(&cc, chain, chainlen, &key.rsa, br_rsa_pkcs1_sign_get_default()) ;
+          break ;
+        case BR_KEYTYPE_EC :
+        {
+          int kt, r ;
+          sbearssl_ec_skey_to(&skey.data.ec, &key.ec, storage.s) ;
+          r = sbearssl_ec_issuer_keytype(&kt, &chain[0]) ;
+          switch (r)
+          {
+            case -2 : strerr_dief1x(96, "certificate issuer key type not recognized") ;
+            case -1 : strerr_diefu1sys(111, "get certificate issuer key type") ;
+            case 0 : break ;
+            default : strerr_diefu3x(96, "get certificate issuer key type", ": ", sbearssl_error_str(r)) ;
+          }
+
+          br_ssl_client_set_single_ec(&cc, chain, chainlen, &key.ec, BR_KEYTYPE_KEYX | BR_KEYTYPE_SIGN, kt, br_ec_get_default(), br_ecdsa_sign_asn1_get_default()) ;
+          break ;
+        }
+        default :
+          strerr_dief1x(96, "unsupported private key type") ;
+      }
+    }
+
     br_ssl_engine_add_flags(&cc.eng, BR_OPT_NO_RENEGOTIATION) ;
     random_string((char *)buf, 32) ;
     random_finish() ;
diff --git a/src/sbearssl/sbearssl_get_keycert.c b/src/sbearssl/sbearssl_get_keycert.c
new file mode 100644
index 0000000..96e826c
--- /dev/null
+++ b/src/sbearssl/sbearssl_get_keycert.c
@@ -0,0 +1,36 @@
+/* ISC license. */
+
+#include <stdlib.h>
+
+#include <skalibs/strerr2.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/genalloc.h>
+
+#include <s6-networking/sbearssl.h>
+#include "sbearssl-internal.h"
+
+size_t sbearssl_get_keycert (sbearssl_skey *skey, genalloc *certs, stralloc *storage)
+{
+  size_t chainlen ;
+  int r ;
+  char const *x = getenv("CERTFILE") ;
+  if (!x) strerr_dienotset(100, "CERTFILE") ;
+  r = sbearssl_cert_readbigpem(x, certs, storage) ;
+  if (r < 0)
+    strerr_diefu2sys(111, "read certificate chain in ", x) ;
+  else if (r)
+    strerr_diefu4sys(96, "read certificate chain in ", x, ": ", sbearssl_error_str(r)) ;
+  chainlen = genalloc_len(sbearssl_cert, certs) ;
+  if (!chainlen)
+    strerr_diefu2x(96, "find a certificate in ", x) ;
+
+  x = getenv("KEYFILE") ;
+  if (!x) strerr_dienotset(100, "KEYFILE") ;
+  r = sbearssl_skey_readfile(x, skey, storage) ;
+  if (r < 0)
+    strerr_diefu2sys(111, "read private key in ", x) ;
+  else if (r)
+    strerr_diefu4x(96, "decode private key in ", x, ": ", sbearssl_error_str(r)) ;
+
+  return chainlen ;
+}
diff --git a/src/sbearssl/sbearssl_get_tas.c b/src/sbearssl/sbearssl_get_tas.c
new file mode 100644
index 0000000..aa8f63b
--- /dev/null
+++ b/src/sbearssl/sbearssl_get_tas.c
@@ -0,0 +1,33 @@
+/* ISC license. */
+
+#include <stdlib.h>
+
+#include <skalibs/strerr2.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/genalloc.h>
+
+#include <s6-networking/sbearssl.h>
+#include "sbearssl-internal.h"
+
+size_t sbearssl_get_tas (genalloc *tas, stralloc *storage)
+{
+  size_t talen ;
+  int r ;
+  char const *x = getenv("CADIR") ;
+  if (x) r = sbearssl_ta_readdir(x, tas, storage) ;
+  else
+  {
+    x = getenv("CAFILE") ;
+    if (!x) strerr_dienotset(100, "CADIR or CAFILE") ;
+    r = sbearssl_ta_readfile(x, tas, storage) ;
+  }
+
+  if (r < 0)
+    strerr_diefu2sys(111, "read trust anchors in ", x) ;
+  else if (r)
+    strerr_diefu4x(96, "read trust anchors in ", x, ": ", sbearssl_error_str(r)) ;
+
+  talen = genalloc_len(sbearssl_ta, tas) ;
+  if (!talen) strerr_dief2x(96, "no trust anchor found in ", x) ;
+  return talen ;
+}
diff --git a/src/sbearssl/sbearssl_server_init_and_run.c b/src/sbearssl/sbearssl_server_init_and_run.c
index a7ae22b..e6df30e 100644
--- a/src/sbearssl/sbearssl_server_init_and_run.c
+++ b/src/sbearssl/sbearssl_server_init_and_run.c
@@ -15,51 +15,33 @@
 
 void sbearssl_server_init_and_run (int *fds, tain_t const *tto, uint32_t preoptions, uint32_t options, unsigned int verbosity, sbearssl_handshake_cb_t_ref cb, unsigned int notif)
 {
-  stralloc storage = STRALLOC_ZERO ;
   sbearssl_skey skey ;
-  genalloc certs = GENALLOC_ZERO ;
-  size_t chainlen ;
-
-  if (preoptions & 1)
-    strerr_dief1x(100, "client certificates are not supported yet") ;
-
-  {
-    char const *x = getenv("KEYFILE") ;
-    int r ;
-    if (!x) strerr_dienotset(100, "KEYFILE") ;
-    r = sbearssl_skey_readfile(x, &skey, &storage) ;
-    if (r < 0)
-      strerr_diefu2sys(111, "read private key in ", x) ;
-    else if (r)
-      strerr_diefu4x(96, "decode private key in ", x, ": ", sbearssl_error_str(r)) ;
-
-    x = getenv("CERTFILE") ;
-    if (!x) strerr_dienotset(100, "CERTFILE") ;
-    r = sbearssl_cert_readbigpem(x, &certs, &storage) ;
-    if (r < 0)
-      strerr_diefu2sys(111, "read certificate chain in ", x) ;
-    else if (r)
-      strerr_diefu4sys(96, "read certificate chain in ", x, ": ", sbearssl_error_str(r)) ;
-    chainlen = genalloc_len(sbearssl_cert, &certs) ;
-    if (!chainlen)
-      strerr_diefu2x(96, "find a certificate in ", x) ;
-  }
+  genalloc certs = GENALLOC_ZERO ;  /* sbearssl_cert */
+  genalloc tas = GENALLOC_ZERO ;  /* sbearssl_ta */
+  stralloc storage = STRALLOC_ZERO ;
+  size_t chainlen = sbearssl_get_keycert(&skey, &certs, &storage) ;
+  size_t n = preoptions & 1 ? sbearssl_get_tas(&tas, &storage) : 0 ;
 
   sbearssl_drop() ;
+  stralloc_shrink(&storage) ;
 
   {
     sbearssl_handshake_cb_context_t cbarg = { .notif = notif } ;
-    unsigned char buf[BR_SSL_BUFSIZE_BIDI] ;
-    br_ssl_server_context sc ;
     union br_skey_u key ;
+    br_ssl_server_context sc ;
+    br_x509_minimal_context xc ;
     br_x509_certificate chain[chainlen] ;
-    size_t i = chainlen ;
+    br_x509_trust_anchor btas[n ? n : 1] ;
+    unsigned char buf[BR_SSL_BUFSIZE_BIDI] ;
 
-    stralloc_shrink(&storage) ;
-    while (i--)
+    for (size_t i = 0 ; i < chainlen ; i++)
       sbearssl_cert_to(genalloc_s(sbearssl_cert, &certs) + i, chain + i, storage.s) ;
     genalloc_free(sbearssl_cert, &certs) ;
 
+    for (size_t i = 0 ; i < n ; i++)
+      sbearssl_ta_to(genalloc_s(sbearssl_ta, &tas) + i, btas + i, storage.s) ;
+    genalloc_free(sbearssl_ta, &tas) ;
+
     switch (skey.type)
     {
       case BR_KEYTYPE_RSA :
@@ -82,19 +64,23 @@ void sbearssl_server_init_and_run (int *fds, tain_t const *tto, uint32_t preopti
         break ;
       }
       default :
-      strerr_dief1x(96, "unsupported private key type") ;
+        strerr_dief1x(96, "unsupported private key type") ;
     }
 
     {
       uint32_t flags = BR_OPT_ENFORCE_SERVER_PREFERENCES | BR_OPT_NO_RENEGOTIATION ;
-      if (preoptions & 1)
-      {
-        /* br_ssl_server_set_trust_anchor_names(&sc, x500names, x500n) ; */
-        if (!(preoptions & 2)) flags |= BR_OPT_TOLERATE_NO_CLIENT_AUTH ;
-      }
+      if (!(preoptions & 2)) flags |= BR_OPT_TOLERATE_NO_CLIENT_AUTH ;
       br_ssl_engine_add_flags(&sc.eng, flags) ;
     }
 
+    if (n)
+    {
+      sbearssl_x509_minimal_init_with_engine(&xc, &sc.eng, btas, n) ;
+      if (!sbearssl_x509_minimal_set_tain(&xc, &STAMP))
+        strerr_diefu1sys(111, "initialize validation time") ;
+      br_ssl_server_set_trust_anchor_names_alt(&sc, btas, n) ;
+    }
+
     random_string((char *)buf, 32) ;
     random_finish() ;
     br_ssl_engine_inject_entropy(&sc.eng, buf, 32) ;
diff --git a/src/sbearssl/sbearssl_x509_minimal_init_with_engine.c b/src/sbearssl/sbearssl_x509_minimal_init_with_engine.c
new file mode 100644
index 0000000..1b5c7a5
--- /dev/null
+++ b/src/sbearssl/sbearssl_x509_minimal_init_with_engine.c
@@ -0,0 +1,25 @@
+/* ISC license. */
+
+#include <bearssl.h>
+
+#include <s6-networking/sbearssl.h>
+
+void sbearssl_x509_minimal_init_with_engine (br_x509_minimal_context *xc, br_ssl_engine_context *eng, br_x509_trust_anchor const *btas, size_t n)
+{
+  static const br_hash_class *hashes[] =
+  {
+    &br_md5_vtable,
+    &br_sha1_vtable,
+    &br_sha224_vtable,
+    &br_sha256_vtable,
+    &br_sha384_vtable,
+    &br_sha512_vtable
+  } ;
+
+  br_x509_minimal_init(xc, &br_sha256_vtable, btas, n) ;
+  br_x509_minimal_set_rsa(xc, br_ssl_engine_get_rsavrfy(eng)) ;
+  br_x509_minimal_set_ecdsa(xc, br_ssl_engine_get_ec(eng), br_ssl_engine_get_ecdsa(eng)) ;
+  for (unsigned int id = br_md5_ID ; id <= br_sha512_ID ; id++)
+    br_x509_minimal_set_hash(xc, id, hashes[id-1]) ;
+  br_ssl_engine_set_x509(eng, &xc->vtable) ;
+}
diff --git a/src/stls/stls_send_environment.c b/src/stls/stls_send_environment.c
index c7cb9c7..ab7fba2 100644
--- a/src/stls/stls_send_environment.c
+++ b/src/stls/stls_send_environment.c
@@ -9,9 +9,22 @@
 
 #include <s6-networking/stls.h>
 
+static int add (buffer *b, int h, char const *key, char const *value)
+{
+  if (buffer_puts(b, key) < 0) return 0 ;
+  if (h && value && value[0])
+  {
+    if (buffer_put(b, "=", 1) < 0
+     || buffer_puts(b, value) < 0)
+      return 0 ;
+  }
+  if (buffer_put(b, "", 1) < 0) return 0 ;
+  return 1 ;
+}
+
+
 int stls_send_environment (struct tls *ctx, int fd)
 {
-  char const *name = tls_conn_servername(ctx) ;
   char buf[4096] ;
   buffer b = BUFFER_INIT(&buffer_write, fd, buf, 4096) ;
   if (buffer_puts(&b, "SSL_PROTOCOL=") < 0
@@ -19,15 +32,13 @@ int stls_send_environment (struct tls *ctx, int fd)
    || buffer_put(&b, "", 1) < 0
    || buffer_puts(&b, "SSL_CIPHER=") < 0
    || buffer_puts(&b, tls_conn_cipher(ctx)) < 0
-   || buffer_put(&b, "", 1) < 0
-   || buffer_puts(&b, "SSL_TLS_SNI_SERVERNAME") < 0)
+   || buffer_put(&b, "", 1) < 0)
     return 0 ;
-  if (name && name[0])
-  {
-    if (buffer_put(&b, "=", 1) < 0
-     || buffer_puts(&b, name) < 0)
-      return 0 ;
-  }
-  if (buffer_putflush(&b, "\0", 2) < 0) return 0 ;
+
+  if (!add(&b, 1, "SSL_TLS_SNI_SERVERNAME", tls_conn_servername(ctx))) return 0 ;
+  if (!add(&b, tls_peer_cert_provided(ctx), "SSL_PEER_CERT_HASH", tls_peer_cert_hash(ctx))) return 0 ;
+  if (!add(&b, tls_peer_cert_provided(ctx), "SSL_PEER_CERT_SUBJECT", tls_peer_cert_subject(ctx))) return 0 ;
+
+  if (buffer_putflush(&b, "", 1) < 0) return 0 ;
   return 1 ;
 }