RT3876: Only load config when needed

Create app_load_config(), a routine to load config file.  Remove the
"always load config" from the main app.  Change the places that used to
load config to call the new common routine.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

apps/apps.c

@@ -496,6 +496,33 @@ static char *app_get_pass(char *arg, int keepbio)
     return BUF_strdup(tpass);
 }
 
+CONF *app_load_config(const char *filename)
+{
+    long errorline = -1;
+    CONF *conf;
+    int i;
+    BIO *in;
+
+    in = bio_open_default(filename, "r");
+    if (in == NULL)
+        return NULL;
+
+    conf = NCONF_new(NULL);
+    i = NCONF_load_bio(conf, in, &errorline);
+    BIO_free(in);
+    if (i > 0)
+        return conf;
+
+    if (errorline <= 0)
+        BIO_printf(bio_err, "%s: Can't load config file \"%s\"\n",
+                   opt_getprog(), filename);
+    else
+        BIO_printf(bio_err, "%s: Error on line %ld of config file \"%s\"\n",
+                   opt_getprog(), errorline, filename);
+    NCONF_free(conf);
+    return NULL;
+}
+
 int add_oid_section(CONF *conf)
 {
     char *p;
@@ -1559,8 +1586,7 @@ CA_DB *load_index(char *dbfile, DB_ATTR *db_attr)
     TXT_DB *tmpdb = NULL;
     BIO *in;
     CONF *dbattr_conf = NULL;
-    char buf[1][BSIZE];
-    long errorline = -1;
+    char buf[BSIZE];
 
     in = BIO_new_file(dbfile, "r");
     if (in == NULL) {
@@ -1571,22 +1597,11 @@ CA_DB *load_index(char *dbfile, DB_ATTR *db_attr)
         goto err;
 
 #ifndef OPENSSL_SYS_VMS
-    BIO_snprintf(buf[0], sizeof buf[0], "%s.attr", dbfile);
+    BIO_snprintf(buf, sizeof buf, "%s.attr", dbfile);
 #else
-    BIO_snprintf(buf[0], sizeof buf[0], "%s-attr", dbfile);
+    BIO_snprintf(buf, sizeof buf, "%s-attr", dbfile);
 #endif
-    dbattr_conf = NCONF_new(NULL);
-    if (NCONF_load(dbattr_conf, buf[0], &errorline) <= 0) {
-        if (errorline > 0) {
-            BIO_printf(bio_err,
-                       "error on line %ld of db attribute file '%s'\n",
-                       errorline, buf[0]);
-            goto err;
-        } else {
-            NCONF_free(dbattr_conf);
-            dbattr_conf = NULL;
-        }
-    }
+    dbattr_conf = app_load_config(buf);
 
     retdb = app_malloc(sizeof(*retdb), "new DB");
     retdb->db = tmpdb;

apps/apps.h

@@ -147,7 +147,6 @@ long app_RAND_load_files(char *file); /* `file' is a list of files to read,
                                        * (see e_os.h).  The string is
                                        * destroyed! */
 
-extern CONF *config;
 extern char *default_config_file;
 extern BIO *bio_in;
 extern BIO *bio_out;
@@ -155,6 +154,7 @@ extern BIO *bio_err;
 BIO *dup_bio_in(void);
 BIO *dup_bio_out(void);
 BIO *bio_open_default(const char *filename, const char *mode);
+CONF *app_load_config(const char* filename);
 void unbuffer(FILE *fp);
 
 /* Often used in calls to bio_open_default. */

apps/asn1pars.c

@@ -334,14 +334,12 @@ static int do_generate(char *genstr, char *genconf, BUF_MEM *buf)
 {
     CONF *cnf = NULL;
     int len;
-    long errline = 0;
     unsigned char *p;
     ASN1_TYPE *atyp = NULL;
 
     if (genconf) {
-        cnf = NCONF_new(NULL);
-        if (!NCONF_load(cnf, genconf, &errline))
-            goto conferr;
+        if ((cnf = app_load_config(genconf)) == NULL)
+            goto err;
         if (!genstr)
             genstr = NCONF_get_string(cnf, "default", "asn1");
         if (!genstr) {
@@ -372,18 +370,8 @@ static int do_generate(char *genstr, char *genconf, BUF_MEM *buf)
     ASN1_TYPE_free(atyp);
     return len;
 
- conferr:
-
-    if (errline > 0)
-        BIO_printf(bio_err, "Error on line %ld of config file '%s'\n",
-                   errline, genconf);
-    else
-        BIO_printf(bio_err, "Error loading config file '%s'\n", genconf);
-
  err:
     NCONF_free(cnf);
     ASN1_TYPE_free(atyp);
-
     return -1;
-
 }

apps/ca.c

@@ -99,7 +99,6 @@
 #define BSIZE 256
 
 #define BASE_SECTION    "ca"
-#define CONFIG_FILE "openssl.cnf"
 
 #define ENV_DEFAULT_CA          "default_ca"
 
@@ -285,7 +284,8 @@ int ca_main(int argc, char **argv)
     STACK_OF(X509) *cert_sk = NULL;
     X509_CRL *crl = NULL;
     const EVP_MD *dgst = NULL;
-    char *configfile = NULL, *md = NULL, *policy = NULL, *keyfile = NULL;
+    char *configfile = default_config_file;
+    char *md = NULL, *policy = NULL, *keyfile = NULL;
     char *certfile = NULL, *crl_ext = NULL, *crlnumberfile = NULL;
     char *infile = NULL, *spkac_file = NULL, *ss_cert_file = NULL;
     char *extensions = NULL, *extfile = NULL, *key = NULL, *passinarg = NULL;
@@ -301,7 +301,7 @@ int ca_main(int argc, char **argv)
     int keyformat = FORMAT_PEM, multirdn = 0, notext = 0, output_der = 0;
     int ret = 1, email_dn = 1, req = 0, verbose = 0, gencrl = 0, dorevoke = 0;
     int i, j, rev_type = REV_NONE, selfsign = 0;
-    long crldays = 0, crlhours = 0, crlsec = 0, errorline = -1, days = 0;
+    long crldays = 0, crlhours = 0, crlsec = 0, days = 0;
     unsigned long chtype = MBSTRING_ASC, nameopt = 0, certopt = 0;
     X509 *x509 = NULL, *x509p = NULL, *x = NULL;
     X509_REVOKED *r = NULL;
@@ -482,40 +482,9 @@ end_of_options:
     argc = opt_num_rest();
     argv = opt_rest();
 
-    tofree = NULL;
-    if (configfile == NULL)
-        configfile = getenv("OPENSSL_CONF");
-    if (configfile == NULL)
-        configfile = getenv("SSLEAY_CONF");
-    if (configfile == NULL) {
-        const char *s = X509_get_default_cert_area();
-        size_t len;
-
-        len = strlen(s) + 1 + sizeof(CONFIG_FILE);
-        tofree = app_malloc(len, "config filename");
-#ifdef OPENSSL_SYS_VMS
-        strcpy(tofree, s);
-#else
-        BUF_strlcpy(tofree, s, len);
-        BUF_strlcat(tofree, "/", len);
-#endif
-        BUF_strlcat(tofree, CONFIG_FILE, len);
-        configfile = tofree;
-    }
-
     BIO_printf(bio_err, "Using configuration from %s\n", configfile);
-    conf = NCONF_new(NULL);
-    if (NCONF_load(conf, configfile, &errorline) <= 0) {
-        if (errorline <= 0)
-            BIO_printf(bio_err, "error loading the config file '%s'\n",
-                       configfile);
-        else
-            BIO_printf(bio_err, "error on line %ld of config file '%s'\n",
-                       errorline, configfile);
+    if ((conf = app_load_config(configfile)) == NULL)
         goto end;
-    }
-    OPENSSL_free(tofree);
-    tofree = NULL;
 
     /* Lets get the config section we are using */
     if (section == NULL) {
@@ -800,18 +769,10 @@ end_of_options:
         }
     }
 
-        /*****************************************************************/
+    /*****************************************************************/
     /* Read extensions config file                                   */
     if (extfile) {
-        extconf = NCONF_new(NULL);
-        if (NCONF_load(extconf, extfile, &errorline) <= 0) {
-            if (errorline <= 0)
-                BIO_printf(bio_err, "ERROR: loading the config file '%s'\n",
-                           extfile);
-            else
-                BIO_printf(bio_err,
-                           "ERROR: on line %ld of config file '%s'\n",
-                           errorline, extfile);
+        if ((extconf = app_load_config(extfile)) == NULL) {
             ret = 1;
             goto end;
         }

apps/openssl.c

@@ -172,6 +172,7 @@ static void apps_startup()
     ERR_load_SSL_strings();
     OpenSSL_add_all_algorithms();
     OpenSSL_add_ssl_algorithms();
+    OPENSSL_load_builtin_modules();
     setup_ui_method();
     /*SSL_library_init();*/
 #ifndef OPENSSL_NO_ENGINE
@@ -199,43 +200,26 @@ static void apps_shutdown()
 
 static char *make_config_name()
 {
-    const char *t = X509_get_default_cert_area();
+    const char *t;
     size_t len;
     char *p;
 
-    len = strlen(t) + strlen(OPENSSL_CONF) + 2;
+    if ((t = getenv("OPENSSL_CONF")) != NULL
+        || (t = getenv("SSLEAY_CONF")) != NULL)
+        return BUF_strdup(t);
+
+    t = X509_get_default_cert_area();
+    len = strlen(t) + 1 + strlen(OPENSSL_CONF) + 1;
     p = app_malloc(len, "config filename buffer");
-    BUF_strlcpy(p, t, len);
+    strcpy(p, t);
 #ifndef OPENSSL_SYS_VMS
-    BUF_strlcat(p, "/", len);
+    strcat(p, "/");
 #endif
-    BUF_strlcat(p, OPENSSL_CONF, len);
+    strcat(p, OPENSSL_CONF);
 
     return p;
 }
 
-static int load_config(CONF *cnf)
-{
-    static int load_config_called = 0;
-
-    if (load_config_called)
-        return 1;
-    load_config_called = 1;
-    if (!cnf)
-        cnf = config;
-    if (!cnf)
-        return 1;
-
-    OPENSSL_load_builtin_modules();
-
-    if (CONF_modules_load(cnf, NULL, 0) <= 0) {
-        BIO_printf(bio_err, "Error configuring OpenSSL\n");
-        ERR_print_errors(bio_err);
-        return 0;
-    }
-    return 1;
-}
-
 static void lock_dbg_cb(int mode, int type, const char *file, int line)
 {
     static int modes[CRYPTO_NUM_LOCKS];
@@ -338,12 +322,11 @@ int main(int argc, char *argv[])
     FUNCTION f, *fp;
     LHASH_OF(FUNCTION) *prog = NULL;
     char **copied_argv = NULL;
-    char *p, *pname, *to_free = NULL;
+    char *p, *pname;
     char buf[1024];
     const char *prompt;
     ARGS arg;
     int first, n, i, ret = 0;
-    long errline;
 
     arg.argv = NULL;
     arg.size = 0;
@@ -394,36 +377,11 @@ int main(int argc, char *argv[])
     pname = opt_progname(argv[0]);
 
     /* Lets load up our environment a little */
+    default_config_file = make_config_name();
     bio_in = dup_bio_in();
     bio_out = dup_bio_out();
     bio_err = BIO_new_fp(stderr, BIO_NOCLOSE | BIO_FP_TEXT);
 
-    /* Determine and load the config file. */
-    default_config_file = getenv("OPENSSL_CONF");
-    if (default_config_file == NULL)
-        default_config_file = getenv("SSLEAY_CONF");
-    if (default_config_file == NULL)
-        default_config_file = to_free = make_config_name();
-    if (!load_config(NULL))
-        goto end;
-    config = NCONF_new(NULL);
-    i = NCONF_load(config, default_config_file, &errline);
-    if (i == 0) {
-        if (ERR_GET_REASON(ERR_peek_last_error())
-            == CONF_R_NO_SUCH_FILE) {
-            BIO_printf(bio_err,
-                       "%s: WARNING: can't open config file: %s\n",
-                       pname, default_config_file);
-            ERR_clear_error();
-            NCONF_free(config);
-            config = NULL;
-        } else {
-            ERR_print_errors(bio_err);
-            NCONF_free(config);
-            exit(1);
-        }
-    }
-
     /* first check the program name */
     f.name = pname;
     fp = lh_FUNCTION_retrieve(prog, &f);
@@ -510,7 +468,7 @@ int main(int argc, char *argv[])
     ret = 1;
  end:
     OPENSSL_free(copied_argv);
-    OPENSSL_free(to_free);
+    OPENSSL_free(default_config_file);
     NCONF_free(config);
     config = NULL;
     lh_FUNCTION_free(prog);

apps/req.c

@@ -200,7 +200,7 @@ int req_main(int argc, char **argv)
     char *outfile = NULL, *keyfile = NULL, *inrand = NULL;
     char *keyalgstr = NULL, *p, *prog, *passargin = NULL, *passargout = NULL;
     char *passin = NULL, *passout = NULL, *req_exts = NULL, *subj = NULL;
-    char *template = NULL, *keyout = NULL;
+    char *template = default_config_file, *keyout = NULL;
     const char *keyalg = NULL;
     OPTION_CHOICE o;
     int ret = 1, x509 = 0, days = 30, i = 0, newreq = 0, verbose =
@@ -377,31 +377,9 @@ int req_main(int argc, char **argv)
         goto end;
     }
 
-    if (template != NULL) {
-        long errline = -1;
-
-        if (verbose)
-            BIO_printf(bio_err, "Using configuration from %s\n", template);
-        req_conf = NCONF_new(NULL);
-        i = NCONF_load(req_conf, template, &errline);
-        if (i == 0) {
-            BIO_printf(bio_err, "error on line %ld of %s\n", errline,
-                       template);
-            goto end;
-        }
-    } else {
-        req_conf = config;
-
-        if (req_conf == NULL) {
-            BIO_printf(bio_err, "Unable to load config info from %s\n",
-                       default_config_file);
-            if (newreq)
-                goto end;
-        } else if (verbose)
-            BIO_printf(bio_err, "Using configuration from %s\n",
-                       default_config_file);
-    }
-
+    if (verbose)
+        BIO_printf(bio_err, "Using configuration from %s\n", template);
+    req_conf = app_load_config(template);
     if (req_conf != NULL) {
         p = NCONF_get_string(req_conf, NULL, "oid_file");
         if (p == NULL)
@@ -873,8 +851,7 @@ int req_main(int argc, char **argv)
     if (ret) {
         ERR_print_errors(bio_err);
     }
-    if (req_conf != config)
-        NCONF_free(req_conf);
+    NCONF_free(req_conf);
     BIO_free(in);
     BIO_free_all(out);
     EVP_PKEY_free(pkey);

apps/spkac.c

@@ -95,7 +95,7 @@ OPTIONS spkac_options[] = {
 
 int spkac_main(int argc, char **argv)
 {
-    BIO *in = NULL, *out = NULL;
+    BIO *out = NULL;
     CONF *conf = NULL;
     ENGINE *e = NULL;
     EVP_PKEY *pkey = NULL;
@@ -184,18 +184,9 @@ int spkac_main(int argc, char **argv)
         goto end;
     }
 
-    in = bio_open_default(infile, "r");
-    if (in == NULL)
+    if ((conf = app_load_config(infile)) == NULL)
         goto end;
 
-    conf = NCONF_new(NULL);
-    i = NCONF_load_bio(conf, in, NULL);
-    if (!i) {
-        BIO_printf(bio_err, "Error parsing config file\n");
-        ERR_print_errors(bio_err);
-        goto end;
-    }
-
     spkstr = NCONF_get_string(conf, spksect, spkac);
 
     if (!spkstr) {
@@ -237,7 +228,6 @@ int spkac_main(int argc, char **argv)
  end:
     NCONF_free(conf);
     NETSCAPE_SPKI_free(spki);
-    BIO_free(in);
     BIO_free_all(out);
     EVP_PKEY_free(pkey);
     OPENSSL_free(passin);

apps/srp.c

@@ -255,14 +255,13 @@ int srp_main(int argc, char **argv)
     CA_DB *db = NULL;
     DB_ATTR db_attr;
     CONF *conf = NULL;
-    int gNindex = -1, maxgN = -1, ret = 1, errors = 0, verbose =
-        0, i, doupdatedb = 0;
-    int mode = OPT_ERR;
+    int gNindex = -1, maxgN = -1, ret = 1, errors = 0, verbose = 0, i;
+    int doupdatedb = 0, mode = OPT_ERR;
     char *user = NULL, *passinarg = NULL, *passoutarg = NULL;
     char *passin = NULL, *passout = NULL, *gN = NULL, *userinfo = NULL;
     char *randfile = NULL, *tofree = NULL, *section = NULL;
-    char **gNrow = NULL, *configfile = NULL, *dbfile = NULL, **pp, *prog;
-    long errorline = -1;
+    char **gNrow = NULL, *configfile = default_config_file;
+    char *dbfile = NULL, **pp, *prog;
     OPTION_CHOICE o;
 
     prog = opt_init(argc, argv, srp_options);
@@ -349,42 +348,12 @@ int srp_main(int argc, char **argv)
     }
 
     if (!dbfile) {
-
-        /*****************************************************************/
-        tofree = NULL;
-        if (configfile == NULL)
-            configfile = getenv("OPENSSL_CONF");
-        if (configfile == NULL)
-            configfile = getenv("SSLEAY_CONF");
-        if (configfile == NULL) {
-            const char *s = X509_get_default_cert_area();
-            size_t len = strlen(s) + 1 + sizeof(CONFIG_FILE);
-
-            tofree = app_malloc(len, "config filename space");
-# ifdef OPENSSL_SYS_VMS
-            strcpy(tofree, s);
-# else
-            BUF_strlcpy(tofree, s, len);
-            BUF_strlcat(tofree, "/", len);
-# endif
-            BUF_strlcat(tofree, CONFIG_FILE, len);
-            configfile = tofree;
-        }
-
         if (verbose)
-            BIO_printf(bio_err, "Using configuration from %s\n", configfile);
-        conf = NCONF_new(NULL);
-        if (NCONF_load(conf, configfile, &errorline) <= 0) {
-            if (errorline <= 0)
-                BIO_printf(bio_err, "error loading the config file '%s'\n",
-                           configfile);
-            else
-                BIO_printf(bio_err, "error on line %ld of config file '%s'\n",
-                           errorline, configfile);
+            BIO_printf(bio_err, "Using configuration from %s\n",
+                       configfile);
+        conf = app_load_config(configfile);
+        if (conf == NULL)
             goto end;
-        }
-        OPENSSL_free(tofree);
-        tofree = NULL;
 
         /* Lets get the config section we are using */
         if (section == NULL) {

apps/ts.c

@@ -188,7 +188,8 @@ int ts_main(int argc, char **argv)
 {
     CONF *conf = NULL;
     char *CAfile = NULL, *untrusted = NULL, *engine = NULL, *prog, **helpp;
-    char *configfile = NULL, *section = NULL, *password = NULL;
+    char *configfile = default_config_file;
+    char *section = NULL, *password = NULL;
     char *data = NULL, *digest = NULL, *rnd = NULL, *policy = NULL;
     char *in = NULL, *out = NULL, *queryfile = NULL, *passin = NULL;
     char *inkey = NULL, *signer = NULL, *chain = NULL, *CApath = NULL;
@@ -389,24 +390,7 @@ static ASN1_OBJECT *txt2obj(const char *oid)
 
 static CONF *load_config_file(const char *configfile)
 {
-    CONF *conf = NULL;
-    long errorline = -1;
-
-    if (!configfile)
-        configfile = getenv("OPENSSL_CONF");
-    if (!configfile)
-        configfile = getenv("SSLEAY_CONF");
-
-    if (configfile &&
-        ((conf = NCONF_new(NULL)) == NULL
-         || NCONF_load(conf, configfile, &errorline) <= 0)) {
-        if (errorline <= 0)
-            BIO_printf(bio_err, "error loading the config file "
-                       "'%s'\n", configfile);
-        else
-            BIO_printf(bio_err, "error on line %ld of config file "
-                       "'%s'\n", errorline, configfile);
-    }
+    CONF *conf = app_load_config(configfile);
 
     if (conf != NULL) {
         const char *p;

apps/x509.c

@@ -521,19 +521,9 @@ int x509_main(int argc, char **argv)
     }
 
     if (extfile) {
-        long errorline = -1;
         X509V3_CTX ctx2;
-        extconf = NCONF_new(NULL);
-        if (!NCONF_load(extconf, extfile, &errorline)) {
-            if (errorline <= 0)
-                BIO_printf(bio_err,
-                           "error loading the config file '%s'\n", extfile);
-            else
-                BIO_printf(bio_err,
-                           "error on line %ld of config file '%s'\n",
-                           errorline, extfile);
+        if ((extconf = app_load_config(extfile)) == NULL)
             goto end;
-        }
         if (!extsect) {
             extsect = NCONF_get_string(extconf, "default", "extensions");
             if (!extsect) {