From 855affd9b681d98f248009ddb2c1abe987029f72 Mon Sep 17 00:00:00 2001
From: Oliver Reiche <oliver.reiche@huawei.com>
Date: Wed, 15 Jun 2022 18:51:47 +0200
Subject: Crypto: Refactor hash computation

... by renaming HashGenerator to (incremental) Hasher and
dropping support for Git/MD5 hashes. The Hasher does not
expose the actual hash implementation.
---
 test/buildtool/crypto/hasher.test.cpp | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 test/buildtool/crypto/hasher.test.cpp

(limited to 'test/buildtool/crypto/hasher.test.cpp')

diff --git a/test/buildtool/crypto/hasher.test.cpp b/test/buildtool/crypto/hasher.test.cpp
new file mode 100644
index 00000000..01a5cb12
--- /dev/null
+++ b/test/buildtool/crypto/hasher.test.cpp
@@ -0,0 +1,28 @@
+#include "catch2/catch.hpp"
+#include "src/buildtool/crypto/hasher.hpp"
+
+template <Hasher::HashType type>
+void test_increment_hash(std::string const& bytes, std::string const& result) {
+    Hasher hasher{type};
+    hasher.Update(bytes.substr(0, bytes.size() / 2));
+    hasher.Update(bytes.substr(bytes.size() / 2));
+    auto digest = std::move(hasher).Finalize();
+    CHECK(digest.HexString() == result);
+}
+
+TEST_CASE("Hasher", "[crypto]") {
+    std::string bytes{"test"};
+
+    SECTION("SHA-1") {
+        // same as: echo -n test | sha1sum
+        test_increment_hash<Hasher::HashType::SHA1>(
+            bytes, "a94a8fe5ccb19ba61c4c0873d391e987982fbbd3");
+    }
+
+    SECTION("SHA-256") {
+        // same as: echo -n test | sha256sum
+        test_increment_hash<Hasher::HashType::SHA256>(
+            bytes,
+            "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08");
+    }
+}
-- 
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