Prepare to provide BIO_set_next().

This will be needed in libssl and freerdp after the next bump.

ok inoguchi jsing

2 files changed, 11 insertions, 2 deletions

diff --git a/src/lib/libcrypto/bio/bio.h b/src/lib/libcrypto/bio/bio.h
index b147e13e5f..9697c8ad3b 100644
--- a/src/lib/libcrypto/bio/bio.h
+++ b/src/lib/libcrypto/bio/bio.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: bio.h,v 1.48 2021/11/29 18:37:34 tb Exp $ */
+/* $OpenBSD: bio.h,v 1.49 2022/01/05 20:22:26 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -632,6 +632,9 @@ BIO *	BIO_pop(BIO *b);
 void    BIO_free_all(BIO *a);
 BIO *   BIO_find_type(BIO *b, int bio_type);
 BIO *   BIO_next(BIO *b);
+#if defined(LIBRESSL_OPAQUE_BIO) || defined(LIBRESSL_CRYPTO_INTERNAL)
+void    BIO_set_next(BIO *b, BIO *next);
+#endif
 BIO *   BIO_get_retry_BIO(BIO *bio, int *reason);
 int     BIO_get_retry_reason(BIO *bio);
 BIO *   BIO_dup_chain(BIO *in);
diff --git a/src/lib/libcrypto/bio/bio_lib.c b/src/lib/libcrypto/bio/bio_lib.c
index 85eb0f0c77..51289ad295 100644
--- a/src/lib/libcrypto/bio/bio_lib.c
+++ b/src/lib/libcrypto/bio/bio_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bio_lib.c,v 1.31 2021/12/09 15:28:58 schwarze Exp $ */
+/* $OpenBSD: bio_lib.c,v 1.32 2022/01/05 20:22:26 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -589,6 +589,12 @@ BIO_next(BIO *b)
 }
 
 void
+BIO_set_next(BIO *b, BIO *next)
+{
+        b->next_bio = next;
+}
+
+void
 BIO_free_all(BIO *bio)
 {
         BIO *b;