BUG/MINOR: ssl/cli: can't find ".crt" files when replacing a certificate

Bug was introduced by commit 26654 ("MINOR: ssl: add "crt" in the
cert_exts array").

When looking for a .crt directly in the cert_exts array, the
ssl_sock_load_pem_into_ckch() function will be called with a argument
which does not have its ".crt" extensions anymore.

If "ssl-load-extra-del-ext" is used this is not a problem since we try
to add the ".crt" when doing the lookup in the tree.

However when using directly a ".crt" without this option it will failed
looking for the file in the tree.

The fix removes the "crt" entry from the array since it does not seem to
be really useful without a rework of all the lookups.

Should fix issue #2265

Must be backported as far as 2.6.

include/haproxy/ssl_ckch-t.h

@@ -139,7 +139,6 @@ struct cafile_entry {
 
 enum {
 	CERT_TYPE_PEM = 0,
-	CERT_TYPE_CRT,
 	CERT_TYPE_KEY,
 #if ((defined SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB && !defined OPENSSL_NO_OCSP) || defined OPENSSL_IS_BORINGSSL)
 	CERT_TYPE_OCSP,

reg-tests/ssl/bug-2265.crt

@@ -0,0 +1 @@
+common.pem

reg-tests/ssl/set_ssl_bug_2265.vtc

@@ -0,0 +1,90 @@
+#REGTEST_TYPE=devel
+
+# This reg-test uses the "set ssl cert" command to update a certificate over the CLI.
+# It requires socat to upload the certificate
+#
+# this check does 3 requests, the first one will use "www.test1.com" as SNI,
+# the second one with the same but that must fail and the third one will use
+# "localhost". Since vtest can't do SSL, we use haproxy as an SSL client with 2
+# chained listen section.
+#
+# This is the same as "set_ssl_cert_noext.vtc" but the .crt contains both the certificate and the key.
+#
+# If this test does not work anymore:
+# - Check that you have socat
+
+varnishtest "Test the 'set ssl cert' feature of the CLI with separate key and crt"
+#REQUIRE_VERSION=2.2
+#REQUIRE_OPTIONS=OPENSSL
+feature cmd "command -v socat"
+feature ignore_unknown_macro
+
+server s1 -repeat 3 {
+  rxreq
+  txresp
+} -start
+
+haproxy h1 -conf {
+    global
+        tune.ssl.default-dh-param 2048
+        tune.ssl.capture-buffer-size 1
+        stats socket "${tmpdir}/h1/stats" level admin
+
+    defaults
+        mode http
+        option httplog
+	retries 0
+        log stderr local0 debug err
+        option logasap
+        timeout connect "${HAPROXY_TEST_TIMEOUT-5s}"
+        timeout client  "${HAPROXY_TEST_TIMEOUT-5s}"
+        timeout server  "${HAPROXY_TEST_TIMEOUT-5s}"
+
+    listen clear-lst
+        bind "fd@${clearlst}"
+        balance roundrobin
+        retries 0 # 2nd SSL connection must fail so skip the retry
+        server s1 "${tmpdir}/ssl.sock" ssl verify none sni str(www.test1.com)
+        server s2 "${tmpdir}/ssl.sock" ssl verify none sni str(www.test1.com)
+        server s3 "${tmpdir}/ssl.sock" ssl verify none sni str(localhost)
+
+    listen ssl-lst
+        bind "${tmpdir}/ssl.sock" ssl crt ${testdir}/bug-2265.crt strict-sni
+
+        server s1 ${s1_addr}:${s1_port}
+} -start
+
+
+haproxy h1 -cli {
+    send "show ssl cert ${testdir}/bug-2265.crt"
+    expect ~ ".*SHA1 FingerPrint: 2195C9F0FD58470313013FC27C1B9CF9864BD1C6"
+}
+
+client c1 -connect ${h1_clearlst_sock} {
+    txreq
+    rxresp
+    expect resp.status == 200
+} -run
+
+shell {
+    printf "set ssl cert ${testdir}/bug-2265.crt <<\n$(cat ${testdir}/ecdsa.pem)\n\n" | socat "${tmpdir}/h1/stats" -
+    echo "commit ssl cert ${testdir}/bug-2265.crt" | socat "${tmpdir}/h1/stats" -
+}
+
+haproxy h1 -cli {
+    send "show ssl cert ${testdir}/bug-2265.crt"
+    expect ~ ".*SHA1 FingerPrint: A490D069DBAFBEE66DE434BEC34030ADE8BCCBF1"
+}
+
+# check that the "www.test1.com" SNI was removed
+client c1 -connect ${h1_clearlst_sock} {
+    txreq
+    rxresp
+    expect resp.status == 503
+} -run
+
+client c1 -connect ${h1_clearlst_sock} {
+    txreq
+    rxresp
+    expect resp.status == 200
+} -run

src/ssl_ckch.c

@@ -1414,7 +1414,6 @@ int ssl_store_load_locations_file(char *path, int create_if_none, enum cafile_ty
 
 struct cert_exts cert_exts[] = {
 	{ "",        CERT_TYPE_PEM,      &ssl_sock_load_pem_into_ckch }, /* default mode, no extensions */
-	{ "crt",     CERT_TYPE_CRT,      &ssl_sock_load_pem_into_ckch },
 	{ "key",     CERT_TYPE_KEY,      &ssl_sock_load_key_into_ckch },
 #if ((defined SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB && !defined OPENSSL_NO_OCSP) || defined OPENSSL_IS_BORINGSSL)
 	{ "ocsp",    CERT_TYPE_OCSP,     &ssl_sock_load_ocsp_response_from_file },