conf_def.c: Avoid calling strlen() in a loop

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/10361)

diff --git a/crypto/conf/conf_def.c b/crypto/conf/conf_def.c
index a8581d7320ea72341f774545e8cc5d4b59445abc..91ae658f659f22e430edb7dd0691535f335a0ddc 100644 (file)
--- a/crypto/conf/conf_def.c
+++ b/crypto/conf/conf_def.c
@@ -729,7 +729,9 @@ static BIO *process_include(char *include, OPENSSL_DIR_CTX **dirctx,
 static BIO *get_next_file(const char *path, OPENSSL_DIR_CTX **dirctx)
 {
     const char *filename;
+    size_t pathlen;
 
+    pathlen = strlen(path);
     while ((filename = OPENSSL_DIR_read(dirctx, path)) != NULL) {
         size_t namelen;
 
@@ -742,7 +744,7 @@ static BIO *get_next_file(const char *path, OPENSSL_DIR_CTX **dirctx)
             char *newpath;
             BIO *bio;
 
-            newlen = strlen(path) + namelen + 2;
+            newlen = pathlen + namelen + 2;
             newpath = OPENSSL_zalloc(newlen);
             if (newpath == NULL) {
                 CONFerr(CONF_F_GET_NEXT_FILE, ERR_R_MALLOC_FAILURE);
@@ -753,14 +755,11 @@ static BIO *get_next_file(const char *path, OPENSSL_DIR_CTX **dirctx)
              * If the given path isn't clear VMS syntax,
              * we treat it as on Unix.
              */
-            {
-                size_t pathlen = strlen(path);
-
-                if (path[pathlen - 1] == ']' || path[pathlen - 1] == '>'
-                    || path[pathlen - 1] == ':') {
-                    /* Clear VMS directory syntax, just copy as is */
-                    OPENSSL_strlcpy(newpath, path, newlen);
-                }
+            if (path[pathlen - 1] == ']'
+                || path[pathlen - 1] == '>'
+                || path[pathlen - 1] == ':') {
+                /* Clear VMS directory syntax, just copy as is */
+                OPENSSL_strlcpy(newpath, path, newlen);
             }
 #endif
             if (newpath[0] == '\0') {