From e963bef6536e71036b1b1642219d75c43590e625 Mon Sep 17 00:00:00 2001
From: Paul Oliver <puzza007@gmail.com>
Date: Sat, 6 Aug 2016 19:33:06 +1200
Subject: [PATCH 1/4] Add hexhash/2

---
 rebar.config        |  3 +++
 rebar.lock          |  2 +-
 src/sha3.app.src    |  3 ++-
 src/sha3.erl        |  8 ++++++++
 test/sha3_tests.erl | 16 ++++++++++++++++
 5 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/rebar.config b/rebar.config
index 1b456c9..90c08c0 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,8 +1,11 @@
 {erl_opts, [{i, "src"},
             warnings_as_errors,
+            debug_info,
             {w, all},
             warn_export_all]}.
 
+{deps, [{hex2bin, "1.0.0"}]}.
+
 {clean_files, [".eunit",
                "ebin/*.beam"]}.
 
diff --git a/rebar.lock b/rebar.lock
index 57afcca..d6faa9e 100644
--- a/rebar.lock
+++ b/rebar.lock
@@ -1 +1 @@
-[].
+[{<<"hex2bin">>,{pkg,<<"hex2bin">>,<<"1.0.0">>},0}].
diff --git a/src/sha3.app.src b/src/sha3.app.src
index 5d0848c..d18de89 100644
--- a/src/sha3.app.src
+++ b/src/sha3.app.src
@@ -5,7 +5,8 @@
   {registered, []},
   {applications, [
                   kernel,
-                  stdlib
+                  stdlib,
+                  hex2bin
                  ]},
   {modules, [sha3]},
   {env, []}
diff --git a/src/sha3.erl b/src/sha3.erl
index c8f46ed..64ae999 100644
--- a/src/sha3.erl
+++ b/src/sha3.erl
@@ -2,6 +2,8 @@
 
 -export([hash_init/1, hash_update/2, hash_final/1, hash/2]).
 
+-export([hexhash/2]).
+
 -on_load(init/0).
 
 -type bitlen() :: 224 | 256 | 384 | 512.
@@ -11,6 +13,8 @@
 
 -type digest() :: <<_:224>> | <<_:256>> | <<_:384>> | <<_:512>>.
 
+-export_type([bitlen/0, context/0, digest/0]).
+
 -define(nif_stub, nif_stub_error(?LINE)).
 nif_stub_error(Line) ->
     erlang:nif_error({nif_not_loaded,module,?MODULE,line,Line}).
@@ -55,3 +59,7 @@ hash_final(_Context) ->
 hash(_BitLen, _Binary) ->
     ?nif_stub.
 
+-spec hexhash(bitlen(), binary()) -> binary().
+hexhash(Bitlen, Binary) ->
+    Hash = hash(Bitlen, Binary),
+    list_to_binary(hex2bin:bin_to_hexstr(Hash)).
diff --git a/test/sha3_tests.erl b/test/sha3_tests.erl
index c8b262f..893b69d 100644
--- a/test/sha3_tests.erl
+++ b/test/sha3_tests.erl
@@ -46,3 +46,19 @@ hash_512_test() ->
     ?assertEqual(<<16#94EE7851163C39C3489373AA0BF885D95925EAD7484C586D2E0D01D9C8069D3C30E2EEA2DC63A91B517FE53E43A31D764A2154A2DA92876366B138ABC4406805:512>>,
         sha3:hash(512, <<16#00112233445566778899AABBCCDDEEFF:128>>)).
 
+hexhash_224_test() ->
+    ?assertEqual(<<"038907E89C919CD8F90A7FBC5A88FF9278108DAEF3EBCDA0CEB383E1">>,
+        sha3:hexhash(224, <<16#00112233445566778899AABBCCDDEEFF:128>>)).
+
+hexhash_256_test() ->
+    ?assertEqual(<<"22BCE46032802AF0ABFACF3768F7BE04A34F5F01DF60F44FFD52D3CA937350C0">>,
+        sha3:hexhash(256, <<16#00112233445566778899AABBCCDDEEFF:128>>)).
+
+hexhash_384_test() ->
+    ?assertEqual(<<"25FAC1ADECBE1B254976FE32C2FE78829B23D7D84316141ECD208D6806A9DB4352A014ADA4106BA0D210DDA0FD18E150">>,
+        sha3:hexhash(384, <<16#00112233445566778899AABBCCDDEEFF:128>>)).
+
+hexhash_512_test() ->
+    ?assertEqual(<<"94EE7851163C39C3489373AA0BF885D95925EAD7484C586D2E0D01D9C8069D3C30E2EEA2DC63A91B517FE53E43A31D764A2154A2DA92876366B138ABC4406805">>,
+        sha3:hexhash(512, <<16#00112233445566778899AABBCCDDEEFF:128>>)).
+

From b89e8e27c3637d63d15b412cf7928512beab6546 Mon Sep 17 00:00:00 2001
From: Paul Oliver <puzza007@gmail.com>
Date: Sat, 6 Aug 2016 19:38:10 +1200
Subject: [PATCH 2/4] Fix Travis build

---
 .travis.yml | 10 ++++++----
 Makefile    | 41 ++++++++++++++++++++++++-----------------
 2 files changed, 30 insertions(+), 21 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index f39fff3..b3451ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,12 @@
 language: erlang
+
+install: wget https://github.com/erlang/rebar3/releases/download/3.1.0/rebar3 && chmod 755 rebar3
+
+script: PATH=.:$PATH make update test dialyzer
+
 notifications:
   disabled: true
-branches:
-  only:
-    - develop
-    - 0.1.0
+
 otp_release:
   - R15B02
   - R15B01
diff --git a/Makefile b/Makefile
index 3e8b822..6ea1c18 100644
--- a/Makefile
+++ b/Makefile
@@ -1,23 +1,30 @@
-.PHONY: doc
+REBAR?=rebar3
+
+.PHONY: \
+	all \
+	clean \
+	nuke \
+	test \
+	update \
+	dialyzer
 
 all:
-	./rebar compile
-	./rebar doc
-	./rebar xref
-	./rebar eunit
-
-compile:
-	./rebar compile
-
-doc:
-	./rebar doc
-
-xref: compile
-	./rebar xref
+	@$(REBAR) compile
 
 clean:
-	./rebar clean
+	@$(REBAR) clean
 
-test: xref
-	./rebar eunit
+nuke: clean
+	@rm -rf _build
 
+test:
+	@$(REBAR) eunit
+
+update:
+	@$(REBAR) update
+
+dialyzer:
+	@$(REBAR) dialyzer
+
+coveralls:
+	@${REBAR} coveralls send

From b80fa2d97af46b7732db6d09aab2dba396990e0c Mon Sep 17 00:00:00 2001
From: Paul Oliver <puzza007@gmail.com>
Date: Sat, 6 Aug 2016 19:42:31 +1200
Subject: [PATCH 3/4] Cache $HOME/.cache/rebar3/ in Travis CI

---
 .travis.yml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index b3451ca..8562db1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,3 +14,8 @@ otp_release:
   - 18.0
   - 18.1
   - 18.2
+
+cache:
+  directories:
+  - $HOME/.cache/rebar3/
+

From b10f9f7327036d12892cb4c7ac744501c6a93abc Mon Sep 17 00:00:00 2001
From: Paul Oliver <puzza007@gmail.com>
Date: Sat, 6 Aug 2016 19:48:55 +1200
Subject: [PATCH 4/4] Ditch old OTP releases

---
 .travis.yml | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 8562db1..f9e5faf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,9 +8,6 @@ notifications:
   disabled: true
 
 otp_release:
-  - R15B02
-  - R15B01
-  - R15B
   - 18.0
   - 18.1
   - 18.2