From 157dd8c553a7c9abfafc8df801a096ee2346058a Mon Sep 17 00:00:00 2001
From: Mark Wooding <mdw@distorted.org.uk>
Date: Thu, 15 Aug 2019 18:16:37 +0100
Subject: [PATCH] symm/t/chacha: Add IETF test vector for XChacha20.

At least I get the answer right.
---
 symm/t/chacha | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/symm/t/chacha b/symm/t/chacha
index 4777803a..d681bed3 100644
--- a/symm/t/chacha
+++ b/symm/t/chacha
@@ -31,12 +31,19 @@ chacha8-core {
 
 xchacha20 {
   ## Unfortunately, XChaCha isn't actually defined anywhere, even though it's
-  ## obvious how to do it.  These test vectors are from
-  ##   https://github.com/DaGenix/rust-crypto/blob/master/src/chacha20.rs
+  ## obvious how to do it.
 
+  ## These test vectors are from
+  ##   https://github.com/DaGenix/rust-crypto/blob/master/src/chacha20.rs
   1b27556473e985d462cd51197a9a46c76009549eac6474f206c4ee0844f68389
   69696ee955b62b73cd62bda875fc73d68219e0036b7a0b37 "" 0 ""
   4febf2fe4b359c508dc5e8b5980c88e38946d8f18f313465c862a08782648248018dacdcb904178853a46dca3a0eaaee747cba97434eaffad58fea8222047e0de6c3a6775106e0331ad714d2f27a55641340a1f1dd9f94532e68cb241cbdd150970d14e05c5b173193fb14f51c41f393835bf7f416a7e0bba81ffb8b13af0e21691d7ecec93b75e6e4183a;
+
+  ## This one's from draft-irtf-cfrg-xchacha-03.
+  808182838485868788898a8b8c8d8e8f909192939495969798999a9b9c9d9e9f
+  404142434445464748494a4b4c4d4e4f5051525354555658 "" 64
+  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
+  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;
 }
 
 chacha8 {
-- 
2.11.0