Add getter for X509_VERIFY_PARAM_get_hostflags

Fixes #5061

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6139)

crypto/x509/x509_vpm.c

diff --git a/crypto/x509/x509_vpm.c b/crypto/x509/x509_vpm.c
index 67e9996..e860afd 100644
--- a/crypto/x509/x509_vpm.c
+++ b/crypto/x509/x509_vpm.c
@@ -393,6 +393,11 @@
     param->hostflags = flags;
 }
 
+unsigned int X509_VERIFY_PARAM_get_hostflags(X509_VERIFY_PARAM *param)
+{
+    return param->hostflags;
+}
+
 char *X509_VERIFY_PARAM_get0_peername(X509_VERIFY_PARAM *param)
 {
     return param->peername;

doc/man3/X509_VERIFY_PARAM_set_flags.pod

diff --git a/doc/man3/X509_VERIFY_PARAM_set_flags.pod b/doc/man3/X509_VERIFY_PARAM_set_flags.pod
index 825f760..d317fa8 100644
--- a/doc/man3/X509_VERIFY_PARAM_set_flags.pod
+++ b/doc/man3/X509_VERIFY_PARAM_set_flags.pod
@@ -11,7 +11,9 @@
 X509_VERIFY_PARAM_get_time,
 X509_VERIFY_PARAM_add0_policy, X509_VERIFY_PARAM_set1_policies,
 X509_VERIFY_PARAM_set1_host, X509_VERIFY_PARAM_add1_host,
-X509_VERIFY_PARAM_set_hostflags, X509_VERIFY_PARAM_get0_peername,
+X509_VERIFY_PARAM_set_hostflags,
+X509_VERIFY_PARAM_get_hostflags,
+X509_VERIFY_PARAM_get0_peername,
 X509_VERIFY_PARAM_set1_email, X509_VERIFY_PARAM_set1_ip,
 X509_VERIFY_PARAM_set1_ip_asc
 - X509 verification parameters
@@ -54,6 +56,7 @@
                                  const char *name, size_t namelen);
  void X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param,
                                       unsigned int flags);
+ unsigned int X509_VERIFY_PARAM_get_hostflags(X509_VERIFY_PARAM *param);
  char *X509_VERIFY_PARAM_get0_peername(X509_VERIFY_PARAM *param);
  int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param,
                                   const char *email, size_t emaillen);
@@ -139,6 +142,9 @@
 with the DANE-EE(3) certificate usage, and the internal check will
 be suppressed as appropriate when DANE support is added to OpenSSL.
 
+X509_VERIFY_PARAM_get_hostflags() returns any host flags previously set via a
+call to X509_VERIFY_PARAM_set_hostflags().
+
 X509_VERIFY_PARAM_add1_host() adds B<name> as an additional reference
 identifier that can match the peer's certificate.  Any previous names
 set via X509_VERIFY_PARAM_set1_host() or X509_VERIFY_PARAM_add1_host()
@@ -186,6 +192,8 @@
 
 X509_VERIFY_PARAM_get_flags() returns the current verification flags.
 
+X509_VERIFY_PARAM_get_hostflags() returns any current host flags.
+
 X509_VERIFY_PARAM_get_inh_flags() returns the current inheritance flags.
 
 X509_VERIFY_PARAM_set_time() and X509_VERIFY_PARAM_set_depth() do not return
@@ -349,6 +357,8 @@
 The flag B<X509_V_FLAG_CB_ISSUER_CHECK> was deprecated in
 OpenSSL 1.1.0, and has no effect.
 
+X509_VERIFY_PARAM_get_hostflags() was added in OpenSSL 1.1.0i.
+
 =head1 COPYRIGHT
 
 Copyright 2009-2018 The OpenSSL Project Authors. All Rights Reserved.

include/openssl/x509_vfy.h

diff --git a/include/openssl/x509_vfy.h b/include/openssl/x509_vfy.h
index 1414781..cede60e 100644
--- a/include/openssl/x509_vfy.h
+++ b/include/openssl/x509_vfy.h
@@ -479,6 +479,7 @@
                                 const char *name, size_t namelen);
 void X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param,
                                      unsigned int flags);
+unsigned int X509_VERIFY_PARAM_get_hostflags(X509_VERIFY_PARAM *param);
 char *X509_VERIFY_PARAM_get0_peername(X509_VERIFY_PARAM *);
 void X509_VERIFY_PARAM_move_peername(X509_VERIFY_PARAM *, X509_VERIFY_PARAM *);
 int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param,

util/libcrypto.num

diff --git a/util/libcrypto.num b/util/libcrypto.num
index e87c4b7..6e7f635 100644
--- a/util/libcrypto.num
+++ b/util/libcrypto.num
@@ -4527,3 +4527,4 @@
 conf_ssl_name_find                      4469	1_1_0i	EXIST::FUNCTION:
 conf_ssl_get_cmd                        4470	1_1_0i	EXIST::FUNCTION:
 conf_ssl_get                            4471	1_1_0i	EXIST::FUNCTION:
+X509_VERIFY_PARAM_get_hostflags         4472	1_1_0i	EXIST::FUNCTION: