Make OPENSSL_config truly ignore errors.

Per discussion: should not exit. Should not print to stderr.
Errors are ignored.  Updated doc to reflect that, and the fact
that this function is to be avoided.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(cherry picked from commit abdd677125f3a9e3082f8c5692203590fdb9b860)

2 files changed, 14 insertions, 34 deletions

diff --git a/crypto/conf/conf_sap.c b/crypto/conf/conf_sap.c
index d03de24695..544fe97387 100644
--- a/crypto/conf/conf_sap.c
+++ b/crypto/conf/conf_sap.c
@@ -86,23 +86,10 @@ void OPENSSL_config(const char *config_name)
     /* Need to load ENGINEs */
     ENGINE_load_builtin_engines();
 #endif
-    /* Add others here? */
-
     ERR_clear_error();
-    if (CONF_modules_load_file(NULL, config_name,
+    CONF_modules_load_file(NULL, config_name,
                                CONF_MFLAGS_DEFAULT_SECTION |
-                               CONF_MFLAGS_IGNORE_MISSING_FILE) <= 0) {
-        BIO *bio_err;
-        ERR_load_crypto_strings();
-        if ((bio_err = BIO_new_fp(stderr, BIO_NOCLOSE)) != NULL) {
-            BIO_printf(bio_err, "Auto configuration failed\n");
-            ERR_print_errors(bio_err);
-            BIO_free(bio_err);
-        }
-        exit(1);
-    }
-
-    return;
+                               CONF_MFLAGS_IGNORE_MISSING_FILE);
 }
 
 void OPENSSL_no_config()
diff --git a/doc/crypto/OPENSSL_config.pod b/doc/crypto/OPENSSL_config.pod
index 888de88f6b..5096faca04 100644
--- a/doc/crypto/OPENSSL_config.pod
+++ b/doc/crypto/OPENSSL_config.pod
@@ -15,31 +15,24 @@ OPENSSL_config, OPENSSL_no_config - simple OpenSSL configuration functions
 
 OPENSSL_config() configures OpenSSL using the standard B<openssl.cnf>
 configuration file name using B<config_name>. If B<config_name> is NULL then
-the default name B<openssl_conf> will be used. Any errors are ignored. Further
-calls to OPENSSL_config() will have no effect. The configuration file format
-is documented in the L<conf(5)|conf(5)> manual page.
+the file specified in the environment variable B<OPENSSL_CONF> will be used,
+and if that is not set then a system default location is used.
+Errors are silently ignored.
+Multiple calls have no effect.
 
 OPENSSL_no_config() disables configuration. If called before OPENSSL_config()
 no configuration takes place.
 
 =head1 NOTES
 
-It is B<strongly> recommended that B<all> new applications call OPENSSL_config()
-or the more sophisticated functions such as CONF_modules_load() during
-initialization (that is before starting any threads). By doing this
-an application does not need to keep track of all configuration options
-and some new functionality can be supported automatically.
-
-It is also possible to automatically call OPENSSL_config() when an application
-calls OPENSSL_add_all_algorithms() by compiling an application with the
-preprocessor symbol B<OPENSSL_LOAD_CONF> #define'd. In this way configuration
-can be added without source changes.
-
-The environment variable B<OPENSSL_CONF> can be set to specify the location
-of the configuration file.
- 
-Currently ASN1 OBJECTs and ENGINE configuration can be performed future
-versions of OpenSSL will add new configuration options.
+The OPENSSL_config() function is designed to be a very simple "call it and
+forget it" function.
+It is however B<much> better than nothing. Applications which need finer
+control over their configuration functionality should use the configuration
+functions such as CONF_modules_load() directly. This function is deprecated
+and its use should be avoided.
+Applications should instead call CONF_modules_load() during
+initialization (that is before starting any threads).
 
 There are several reasons why calling the OpenSSL configuration routines is
 advisable. For example new ENGINE functionality was added to OpenSSL 0.9.7.