Add test cases for the non CA certificate with pathlen:0

Accept verification without -x509_strict and reject it with it.

Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11463)

test/certs/ee-pathlen.pem

@@ -0,0 +1,17 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

test/certs/setup.sh

@@ -154,7 +154,7 @@ openssl x509 -in sca-cert.pem -trustout \
     -addtrust anyExtendedKeyUsage -out sca+anyEKU.pem
 
 # Primary leaf cert: ee-cert
-# ee variants: expired, issuer-key2, issuer-name2
+# ee variants: expired, issuer-key2, issuer-name2, bad-pathlen
 # trust variants: +serverAuth, -serverAuth, +clientAuth, -clientAuth
 # purpose variants: client
 #
@@ -163,6 +163,8 @@ openssl x509 -in sca-cert.pem -trustout \
 ./mkcert.sh genee server.example ee-key ee-cert2 ca-key2 ca-cert2
 ./mkcert.sh genee server.example ee-key ee-name2 ca-key ca-name2
 ./mkcert.sh genee -p clientAuth server.example ee-key ee-client ca-key ca-cert
+./mkcert.sh genee server.example ee-key ee-pathlen ca-key ca-cert \
+    -extfile <(echo "basicConstraints=CA:FALSE,pathlen:0")
 #
 openssl x509 -in ee-cert.pem -trustout \
     -addtrust serverAuth -out ee+serverAuth.pem

test/recipes/25-test_verify.t

@@ -27,7 +27,7 @@ sub verify {
     run(app([@args]));
 }
 
-plan tests => 137;
+plan tests => 139;
 
 # Canonical success
 ok(verify("ee-cert", "sslserver", ["root-cert"], ["ca-cert"]),
@@ -222,6 +222,10 @@ ok(verify("ee-client", "sslclient", [qw(ee+clientAuth)], [], "-partial_chain"),
    "accept direct match with client trust");
 ok(!verify("ee-client", "sslclient", [qw(ee-clientAuth)], [], "-partial_chain"),
    "reject direct match with client mistrust");
+ok(verify("ee-pathlen", "sslserver", [qw(root-cert)], [qw(ca-cert)]),
+   "accept non-ca with pathlen:0 by default");
+ok(!verify("ee-pathlen", "sslserver", [qw(root-cert)], [qw(ca-cert)], "-x509_strict"),
+   "reject non-ca with pathlen:0 with strict flag");
 
 # Proxy certificates
 ok(!verify("pc1-cert", "sslclient", [qw(root-cert)], [qw(ee-client ca-cert)]),