Merge pull request wolfSSL#8531 from night1rider/zephyr-fs-rewind-fix

Fix for missing rewind function in zephyr

Author: dgarske

wolfcrypt/src/wc_port.c

@@ -1041,6 +1041,15 @@ int z_fs_close(XFILE file)
     return ret;
 }
 
+/* Rewind the file pointer to the beginning of the file */
+/* This is not a 'rewind' is not supported in Zephyr so */
+/* use fs_seek to move the file pointer to the beginning of the file */
+/* calling it z_fs_rewind to avoid future conflicts if rewind is added */
+int z_fs_rewind(XFILE file)
+{
+    return fs_seek(file, 0, FS_SEEK_SET);
+}
+
 #endif /* !NO_FILESYSTEM && !WOLFSSL_ZEPHYR */
 
 #if !defined(WOLFSSL_USER_MUTEX)

wolfssl/wolfcrypt/wc_port.h

@@ -804,13 +804,14 @@ WOLFSSL_ABI WOLFSSL_API int wolfCrypt_Cleanup(void);
      * make the API more POSIX like. */
     XFILE z_fs_open(const char* filename, const char* mode);
     int z_fs_close(XFILE file);
+    int z_fs_rewind(XFILE file);
 
     #define XFOPEN              z_fs_open
     #define XFCLOSE             z_fs_close
     #define XFFLUSH             fs_sync
     #define XFSEEK              fs_seek
     #define XFTELL              fs_tell
-    #define XFREWIND            fs_rewind
+    #define XFREWIND            z_fs_rewind
     #define XFREAD(P,S,N,F)     fs_read(F, P, S*N)
     #define XFWRITE(P,S,N,F)    fs_write(F, P, S*N)
     #define XSEEK_SET           FS_SEEK_SET