From c0ee8dc3a526fc3090a50e9559a3ceab938dbfb2 Mon Sep 17 00:00:00 2001
From: Fabian Keil <fk@fabiankeil.de>
Date: Sat, 30 May 2020 05:39:32 +0200
Subject: [PATCH] Add ssl_send_data_delayed()
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
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... a SSL version of write_socket_delayed().
Based on a patch by Vašek Švec.
---
ssl.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
ssl.h | 2 ++
2 files changed, 65 insertions(+)
diff --git a/ssl.c b/ssl.c
index 0bb549bf..852a9ce5 100644
--- a/ssl.c
+++ b/ssl.c
@@ -260,6 +260,69 @@ extern int ssl_send_data(mbedtls_ssl_context *ssl, const unsigned char *buf, siz
}
+/*********************************************************************
+ *
+ * Function : ssl_send_data_delayed
+ *
+ * Description : Sends the contents of buf (for n bytes) to given SSL
+ * connection, optionally delaying the operation.
+ *
+ * Parameters :
+ * 1 : ssl = SSL context to send data to
+ * 2 : buf = Pointer to data to be sent
+ * 3 : len = Length of data to be sent to the SSL context
+ * 4 : delay = Delay in milliseconds.
+ *
+ * Returns : 0 on success (entire buffer sent).
+ * nonzero on error.
+ *
+ *********************************************************************/
+extern int ssl_send_data_delayed(mbedtls_ssl_context *ssl,
+ const unsigned char *buf, size_t len,
+ unsigned int delay)
+{
+ size_t i = 0;
+
+ if (delay == 0)
+ {
+ if (ssl_send_data(ssl, buf, len) < 0)
+ {
+ return -1;
+ }
+ else
+ {
+ return 0;
+ }
+ }
+
+ while (i < len)
+ {
+ size_t write_length;
+ enum { MAX_WRITE_LENGTH = 10 };
+
+ if ((i + MAX_WRITE_LENGTH) > len)
+ {
+ write_length = len - i;
+ }
+ else
+ {
+ write_length = MAX_WRITE_LENGTH;
+ }
+
+ privoxy_millisleep(delay);
+
+ if (ssl_send_data(ssl, buf + i, write_length) < 0)
+ {
+ return -1;
+ }
+ i += write_length;
+ }
+
+ return 0;
+
+}
+
+
/*********************************************************************
*
* Function : ssl_recv_data
diff --git a/ssl.h b/ssl.h
index 1c65182f..f62f9735 100644
--- a/ssl.h
+++ b/ssl.h
@@ -54,6 +54,8 @@ extern int tunnel_established_successfully(const char *response, unsigned int re
/* Functions for sending and receiving data over TLS/SSL connections */
extern int ssl_send_data(mbedtls_ssl_context *ssl, const unsigned char *buf, size_t len);
+extern int ssl_send_data_delayed(mbedtls_ssl_context *ssl, const unsigned char *buf,
+ size_t len, unsigned int delay);
extern int ssl_recv_data(mbedtls_ssl_context *ssl, unsigned char *buf, size_t maxLen);
extern long ssl_flush_socket(mbedtls_ssl_context *ssl, struct iob *iob);
extern void ssl_send_certificate_error(struct client_state *csp);
--
2.49.0