Add Next Protocol Negotiation.

1 files changed, 43 insertions, 0 deletions

diff --git a/apps/apps.c b/apps/apps.c
index 3a3009d473..5bd19c5d01 100644
--- a/apps/apps.c
+++ b/apps/apps.c
@@ -3031,3 +3031,46 @@ int raw_write_stdout(const void *buf,int siz)
 int raw_write_stdout(const void *buf,int siz)
 	{	return write(fileno(stdout),buf,siz);	}
 #endif
+
+#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NPN)
+/* next_protos_parse parses a comma separated list of strings into a string
+ * in a format suitable for passing to SSL_CTX_set_next_protos_advertised.
+ *   outlen: (output) set to the length of the resulting buffer on success.
+ *   in: a NUL termianted string like "abc,def,ghi"
+ *
+ *   returns: a malloced buffer or NULL on failure.
+ */
+unsigned char *next_protos_parse(unsigned short *outlen, const char *in)
+	{
+	size_t len;
+	unsigned char *out;
+	size_t i, start = 0;
+
+	len = strlen(in);
+	if (len > 65535)
+		return NULL;
+
+	out = OPENSSL_malloc(strlen(in) + 1);
+	if (!out)
+		return NULL;
+
+	for (i = 0; i <= len; ++i)
+		{
+		if (i == len || in[i] == ',')
+			{
+			if (i - start > 255)
+				{
+				OPENSSL_free(out);
+				return NULL;
+				}
+			out[start] = i - start;
+			start = i + 1;
+			}
+		else
+			out[i+1] = in[i];
+		}
+
+	*outlen = len + 1;
+	return out;
+	}
+#endif  /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NPN */