Implement hashing using OpenSSL

src/utilities.cpp

@@ -2,17 +2,22 @@
 #include <list>
 #include <map>
 #include <iostream>
+#include <random>
 #include <fstream>
 #include <locale>
 #include <codecvt>
 #include <regex>
 #include <vector>
+#include <sstream>
+#include <iomanip>
+#include <iostream>
+#include <stdexcept>
 #include <pqxx/pqxx>
 #include "crow.h"
 #include "cpp/opportunisticsecuresmtpclient.hpp"
 #include "cpp/plaintextmessage.hpp"
 #include "cpp/htmlmessage.hpp"
-#include <stdexcept>
+#include <openssl/sha.h>
 
 using namespace jed_utils::cpp;
 
@@ -214,4 +219,27 @@ namespace Utilities {
         }
         return 0;
     }
+
+    std::string createHashSha512(const std::string str){
+        unsigned char hash[SHA512_DIGEST_LENGTH];
+
+        SHA512_CTX sha512;
+        SHA512_Init(&sha512);
+        SHA512_Update(&sha512, str.c_str(), str.size());
+        SHA512_Final(hash, &sha512);
+
+        std::stringstream ss;
+
+        for(int i = 0; i < SHA512_DIGEST_LENGTH; i++){
+            ss << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>( hash[i] );
+        }
+        return ss.str();
+    }
+
+    /*
+     * Hashes a given password with a given salt
+     */
+    std::string hashPassword(std::string pwsalt, std::string password) {
+        return createHashSha512(pwsalt + password);
+    }
 }