From 913a7ee3584b9cdb05b473123b529677f16e4e0b Mon Sep 17 00:00:00 2001
From: June McEnroe <june@causal.agency>
Date: Sun, 27 Feb 2022 09:57:33 -0500
Subject: Import LibreSSL 3.5.0

---
 tls_bio_cb.c | 65 ++++++++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 46 insertions(+), 19 deletions(-)

(limited to 'tls_bio_cb.c')

diff --git a/tls_bio_cb.c b/tls_bio_cb.c
index 0091808..dad9d23 100644
--- a/tls_bio_cb.c
+++ b/tls_bio_cb.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tls_bio_cb.c,v 1.19 2017/01/12 16:18:39 jsing Exp $ */
+/* $OpenBSD: tls_bio_cb.c,v 1.20 2022/01/10 23:39:48 tb Exp $ */
 /*
  * Copyright (c) 2016 Tobias Pape <tobias@netshed.de>
  *
@@ -29,19 +29,41 @@ static int bio_cb_read(BIO *bio, char *buf, int size);
 static int bio_cb_puts(BIO *bio, const char *str);
 static long bio_cb_ctrl(BIO *bio, int cmd, long num, void *ptr);
 
-static BIO_METHOD bio_cb_method = {
-	.type = BIO_TYPE_MEM,
-	.name = "libtls_callbacks",
-	.bwrite = bio_cb_write,
-	.bread = bio_cb_read,
-	.bputs = bio_cb_puts,
-	.ctrl = bio_cb_ctrl,
-};
+static BIO_METHOD *bio_cb_method;
+
+static pthread_mutex_t bio_cb_method_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static void
+bio_cb_method_init(void)
+{
+	BIO_METHOD *bio_method;
+
+	if (bio_cb_method != NULL)
+		return;
+
+	bio_method = BIO_meth_new(BIO_TYPE_MEM, "libtls_callbacks");
+	if (bio_method == NULL)
+		return;
+
+	BIO_meth_set_write(bio_method, bio_cb_write);
+	BIO_meth_set_read(bio_method, bio_cb_read);
+	BIO_meth_set_puts(bio_method, bio_cb_puts);
+	BIO_meth_set_ctrl(bio_method, bio_cb_ctrl);
+
+	bio_cb_method = bio_method;
+}
 
 static BIO_METHOD *
 bio_s_cb(void)
 {
-	return (&bio_cb_method);
+	if (bio_cb_method != NULL)
+		return (bio_cb_method);
+
+	pthread_mutex_lock(&bio_cb_method_lock);
+	bio_cb_method_init();
+	pthread_mutex_unlock(&bio_cb_method_lock);
+
+	return (bio_cb_method);
 }
 
 static int
@@ -57,10 +79,10 @@ bio_cb_ctrl(BIO *bio, int cmd, long num, void *ptr)
 
 	switch (cmd) {
 	case BIO_CTRL_GET_CLOSE:
-		ret = (long)bio->shutdown;
+		ret = (long)BIO_get_shutdown(bio);
 		break;
 	case BIO_CTRL_SET_CLOSE:
-		bio->shutdown = (int)num;
+		BIO_set_shutdown(bio, (int)num);
 		break;
 	case BIO_CTRL_DUP:
 	case BIO_CTRL_FLUSH:
@@ -69,7 +91,7 @@ bio_cb_ctrl(BIO *bio, int cmd, long num, void *ptr)
 	case BIO_CTRL_GET:
 	case BIO_CTRL_SET:
 	default:
-		ret = BIO_ctrl(bio->next_bio, cmd, num, ptr);
+		ret = BIO_ctrl(BIO_next(bio), cmd, num, ptr);
 	}
 
 	return (ret);
@@ -78,7 +100,7 @@ bio_cb_ctrl(BIO *bio, int cmd, long num, void *ptr)
 static int
 bio_cb_write(BIO *bio, const char *buf, int num)
 {
-	struct tls *ctx = bio->ptr;
+	struct tls *ctx = BIO_get_data(bio);
 	int rv;
 
 	BIO_clear_retry_flags(bio);
@@ -96,7 +118,7 @@ bio_cb_write(BIO *bio, const char *buf, int num)
 static int
 bio_cb_read(BIO *bio, char *buf, int size)
 {
-	struct tls *ctx = bio->ptr;
+	struct tls *ctx = BIO_get_data(bio);
 	int rv;
 
 	BIO_clear_retry_flags(bio);
@@ -115,8 +137,9 @@ int
 tls_set_cbs(struct tls *ctx, tls_read_cb read_cb, tls_write_cb write_cb,
     void *cb_arg)
 {
-	int rv = -1;
+	const BIO_METHOD *bio_cb;
 	BIO *bio;
+	int rv = -1;
 
 	if (read_cb == NULL || write_cb == NULL) {
 		tls_set_errorx(ctx, "no callbacks provided");
@@ -127,12 +150,16 @@ tls_set_cbs(struct tls *ctx, tls_read_cb read_cb, tls_write_cb write_cb,
 	ctx->write_cb = write_cb;
 	ctx->cb_arg = cb_arg;
 
-	if ((bio = BIO_new(bio_s_cb())) == NULL) {
+	if ((bio_cb = bio_s_cb()) == NULL) {
+		tls_set_errorx(ctx, "failed to create callback method");
+		goto err;
+	}
+	if ((bio = BIO_new(bio_cb)) == NULL) {
 		tls_set_errorx(ctx, "failed to create callback i/o");
 		goto err;
 	}
-	bio->ptr = ctx;
-	bio->init = 1;
+	BIO_set_data(bio, ctx);
+	BIO_set_init(bio, 1);
 
 	SSL_set_bio(ctx->ssl_conn, bio, bio);
 
-- 
cgit 1.4.1