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.

1 files changed, 0 insertions, 42 deletions

diff --git a/src/buildtool/crypto/hash_impl_git.cpp b/src/buildtool/crypto/hash_impl_git.cpp
deleted file mode 100644
index 9cb2a761..00000000
--- a/src/buildtool/crypto/hash_impl_git.cpp
+++ /dev/null
@@ -1,42 +0,0 @@
-#include <array>
-#include <cstdint>
-
-#include "openssl/sha.h"
-#include "src/buildtool/crypto/hash_impl.hpp"
-
-/// \brief Hash implementation for Git blob ids.
-/// Does not support incremental hashing.
-class HashImplGit final : public IHashImpl {
-  public:
-    auto Update(std::string const& /*data*/) noexcept -> bool final {
-        return false;
-    }
-
-    auto Finalize() && noexcept -> std::optional<std::string> final {
-        return std::nullopt;
-    }
-
-    auto Compute(std::string const& data) && noexcept -> std::string final {
-        SHA_CTX ctx;
-        std::string const header{"blob " + std::to_string(data.size()) + '\0'};
-        if (SHA1_Init(&ctx) == 1 &&
-            SHA1_Update(&ctx, header.data(), header.size()) == 1 &&
-            SHA1_Update(&ctx, data.data(), data.size()) == 1) {
-            auto out = std::array<std::uint8_t, SHA_DIGEST_LENGTH>{};
-            if (SHA1_Final(out.data(), &ctx) == 1) {
-                return std::string{out.begin(), out.end()};
-            }
-        }
-        FatalError();
-        return {};
-    }
-
-    [[nodiscard]] auto DigestLength() const noexcept -> std::size_t final {
-        return SHA_DIGEST_LENGTH;
-    }
-};
-
-/// \brief Factory for Git implementation
-auto CreateHashImplGit() -> std::unique_ptr<IHashImpl> {
-    return std::make_unique<HashImplGit>();
-}