cf: Check for OpenSSL FIPS

cf/crypto.m4

@@ -140,6 +140,15 @@ if test "$openssl" = "yes"; then
                  [AC_DEFINE_UNQUOTED([HAVE_OPENSSL_30], 1,
                                      [whether OpenSSL is 3.0 or higher])]
                  )
+    AC_CHECK_HEADERS([openssl/fips.h],
+                     [AC_DEFINE_UNQUOTED([HAVE_OPENSSL_FIPS_H], 1,
+                                         [whether openssl/fips.h is available])]
+                     )
+    AC_CHECK_LIB([crypto],
+                 [FIPS_mode_set],
+                 [AC_DEFINE_UNQUOTED([HAVE_OPENSSL_FIPS_MODE_SET_API], 1,
+                                     [whether FIPS_mode_set API is available])]
+                 )
 fi
 
 LIB_hcrypto='$(top_builddir)/lib/hcrypto/libhcrypto.la'