From 9870a8aa2887849d59e1b7559ef042ffa4df151c Mon Sep 17 00:00:00 2001
From: Roy Carter <carterroy22@gmail.com>
Date: Mon, 9 Mar 2026 15:22:41 +0200
Subject: [PATCH] bio: fixed logic compatibility to openSSL for reset,pending
 and get data bio (flush was already correct)

---
 src/bio.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/bio.c b/src/bio.c
index 02431dd38ae..d10c0d8fa7b 100644
--- a/src/bio.c
+++ b/src/bio.c
@@ -1300,9 +1300,15 @@ size_t wolfSSL_BIO_ctrl_pending(WOLFSSL_BIO *bio)
 #endif
 
     if (bio == NULL) {
-        return 0;
+        return WOLFSSL_FATAL_ERROR;
     }
 
+    if (bio->method != NULL && bio->method->ctrlCb != NULL)
+    {
+        WOLFSSL_MSG("Calling custom BIO ctrl pending callback");
+        return (int)bio->method->ctrlCb(bio, WOLFSSL_BIO_CTRL_PENDING, 0, NULL);
+    }   
+
     if (bio->type == WOLFSSL_BIO_MD ||
             bio->type == WOLFSSL_BIO_BASE64) {
         /* these are wrappers only, get next bio */
@@ -1713,6 +1719,12 @@ int wolfSSL_BIO_reset(WOLFSSL_BIO *bio)
         return WOLFSSL_BIO_ERROR;
     }
 
+    if (bio->method != NULL && bio->method->ctrlCb != NULL)
+    {
+        WOLFSSL_MSG("Calling custom BIO reset callback");
+        return (int)bio->method->ctrlCb(bio, WOLFSSL_BIO_CTRL_RESET, 0, NULL);
+    }
+
     switch (bio->type) {
         #ifndef NO_FILESYSTEM
         case WOLFSSL_BIO_FILE:
@@ -2184,7 +2196,11 @@ int wolfSSL_BIO_get_mem_data(WOLFSSL_BIO* bio, void* p)
 
     if (bio == NULL)
         return WOLFSSL_FATAL_ERROR;
-
+    if (bio->method != NULL && bio->method->ctrlCb != NULL)
+    {
+        WOLFSSL_MSG("Calling custom BIO get mem data callback");
+        return (int)bio->method->ctrlCb(bio, WOLFSSL_BIO_CTRL_INFO, 0, p);
+    }
     mem_bio = bio;
     /* Return pointer from last memory BIO in chain */
     while (bio->next) {