vtls: move sha256sum into the Curl_ssl struct

The SHA-256 checksumming is also an SSL backend-specific function.
Let's include it in the struct declaring the functionality of SSL
backends.

In contrast to MD5, there is no fall-back code. To indicate this, the
respective entries are NULL for those backends that offer no support for
SHA-256 checksumming.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

1 files changed, 10 insertions, 1 deletions

diff --git a/lib/vtls/polarssl.c b/lib/vtls/polarssl.c
index f2a7c93b8..5b48945a6 100644
--- a/lib/vtls/polarssl.c
+++ b/lib/vtls/polarssl.c
@@ -870,6 +870,14 @@ bool Curl_polarssl_data_pending(const struct connectdata *conn, int sockindex)
   return ssl_get_bytes_avail(&conn->ssl[sockindex].ssl) != 0;
 }
 
+static void Curl_polarssl_sha256sum(const unsigned char *input,
+                                    size_t inputlen,
+                                    unsigned char *sha256sum,
+                                    size_t sha256len UNUSED_PARAM)
+{
+  sha256(input, inputlen, sha256sum, 0);
+}
+
 const struct Curl_ssl Curl_ssl_polarssl = {
   "polarssl",                        /* name */
 
@@ -893,7 +901,8 @@ const struct Curl_ssl Curl_ssl_polarssl = {
   Curl_none_set_engine_default,      /* set_engine_default */
   Curl_none_engines_list,            /* engines_list */
   Curl_none_false_start,             /* false_start */
-  Curl_none_md5sum                   /* md5sum */
+  Curl_none_md5sum,                  /* md5sum */
+  Curl_polarssl_sha256sum            /* sha256sum */
 };
 
 const struct Curl_ssl *Curl_ssl = &Curl_ssl_polarssl;