From c298f3760228ad7846d40b6850a777ca5e5c5117 Mon Sep 17 00:00:00 2001
From: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
Date: Tue, 12 Nov 2019 16:41:00 +0100
Subject: quic: Refactor for crypto contexts

Type: refactor

Change-Id: I5ec7079d34826edd7a3048ae1d44037386f5d3ff
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
---
 src/plugins/quic/quic_crypto.c | 45 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

(limited to 'src/plugins/quic/quic_crypto.c')

diff --git a/src/plugins/quic/quic_crypto.c b/src/plugins/quic/quic_crypto.c
index c30e68c34ab..2223ab66eab 100644
--- a/src/plugins/quic/quic_crypto.c
+++ b/src/plugins/quic/quic_crypto.c
@@ -322,6 +322,51 @@ ptls_cipher_suite_t *quic_crypto_cipher_suites[] =
   NULL
 };
 
+int
+quic_encrypt_ticket_cb (ptls_encrypt_ticket_t * _self, ptls_t * tls,
+			int is_encrypt, ptls_buffer_t * dst, ptls_iovec_t src)
+{
+  quic_session_cache_t *self = (void *) _self;
+  int ret;
+
+  if (is_encrypt)
+    {
+
+      /* replace the cached entry along with a newly generated session id */
+      clib_mem_free (self->data.base);
+      if ((self->data.base = clib_mem_alloc (src.len)) == NULL)
+	return PTLS_ERROR_NO_MEMORY;
+
+      ptls_get_context (tls)->random_bytes (self->id, sizeof (self->id));
+      clib_memcpy (self->data.base, src.base, src.len);
+      self->data.len = src.len;
+
+      /* store the session id in buffer */
+      if ((ret = ptls_buffer_reserve (dst, sizeof (self->id))) != 0)
+	return ret;
+      clib_memcpy (dst->base + dst->off, self->id, sizeof (self->id));
+      dst->off += sizeof (self->id);
+
+    }
+  else
+    {
+
+      /* check if session id is the one stored in cache */
+      if (src.len != sizeof (self->id))
+	return PTLS_ERROR_SESSION_NOT_FOUND;
+      if (clib_memcmp (self->id, src.base, sizeof (self->id)) != 0)
+	return PTLS_ERROR_SESSION_NOT_FOUND;
+
+      /* return the cached value */
+      if ((ret = ptls_buffer_reserve (dst, self->data.len)) != 0)
+	return ret;
+      clib_memcpy (dst->base + dst->off, self->data.base, self->data.len);
+      dst->off += self->data.len;
+    }
+
+  return 0;
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *
-- 
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