From eda9a7bbefc5587bf1ff895a9214f450e64575fa Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Mon, 5 Mar 2018 22:45:56 +0100
Subject: Implement 'create' operation, add seeding

Seeding is currently only done on the key you specify, in the future
the user should request data that it can seed.
---
 include/Hash.hpp | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 include/Hash.hpp

(limited to 'include/Hash.hpp')

diff --git a/include/Hash.hpp b/include/Hash.hpp
new file mode 100644
index 0000000..d7c90b0
--- /dev/null
+++ b/include/Hash.hpp
@@ -0,0 +1,46 @@
+#pragma once
+
+#include "utils.hpp"
+#include <sodium/crypto_generichash_blake2b.h>
+#include <stdexcept>
+#include <unordered_map>
+
+namespace odhtdb
+{
+    const int HASH_BYTE_SIZE = 32;
+    
+    class HashException : public std::runtime_error
+    {
+    public:
+        HashException(const std::string &errMsg) : std::runtime_error(errMsg) {}
+    };
+    
+    class Hash
+    {
+    public:
+        Hash();
+        // Throws HashException on failure
+        Hash(const void *input, const size_t inputSize);
+        
+        void* getData() const { return (void*)data; }
+        size_t getSize() const { return HASH_BYTE_SIZE; }
+        
+        size_t operator()() const;
+        bool operator==(const Hash &other) const;
+        
+        std::string toString() const;
+    private:
+        char data[HASH_BYTE_SIZE];
+    };
+    
+    struct HashHasher
+    {
+        size_t operator()(const Hash &hash) const
+        {
+            return hash();
+        }
+    };
+    
+    template <typename ValueType>
+    using MapHashKey = std::unordered_map<Hash, ValueType, HashHasher>;
+}
-- 
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