Move the registration of callback functions to special functions

designed for that.  This removes the potential error to mix data and
function pointers.

Please note that I'm a little unsure how incorrect calls to the old
ctrl functions should be handled, in som cases.  I currently return 0
and that's it, but it may be more correct to generate a genuine error
in those cases.

1 files changed, 16 insertions, 0 deletions

diff --git a/crypto/evp/bio_enc.c b/crypto/evp/bio_enc.c
index 36a601897d..629bf4b95d 100644
--- a/crypto/evp/bio_enc.c
+++ b/crypto/evp/bio_enc.c
@@ -69,6 +69,7 @@ static int enc_read(BIO *h,char *buf,int size);
 static long enc_ctrl(BIO *h,int cmd,long arg1,char *arg2);
 static int enc_new(BIO *h);
 static int enc_free(BIO *data);
+static long enc_callback_ctrl(BIO *h,int cmd,void (*fp)());
 #define ENC_BLOCK_SIZE	(1024*4)
 
 typedef struct enc_struct
@@ -92,6 +93,7 @@ static BIO_METHOD methods_enc=
 	enc_ctrl,
 	enc_new,
 	enc_free,
+	enc_callback_ctrl,
 	};
 
 BIO_METHOD *BIO_f_cipher(void)
@@ -368,6 +370,20 @@ again:
 	return(ret);
 	}
 
+static long enc_callback_ctrl(BIO *b, int cmd, void (*fp)())
+	{
+	long ret=1;
+
+	if (b->next_bio == NULL) return(0);
+	switch (cmd)
+		{
+	default:
+		ret=BIO_callback_ctrl(b->next_bio,cmd,fp);
+		break;
+		}
+	return(ret);
+	}
+
 /*
 void BIO_set_cipher_ctx(b,c)
 BIO *b;