Added Crypto::to_hex_string

1 files changed, 11 insertions, 0 deletions

diff --git a/crypto.hpp b/crypto.hpp
index e1648d2..0785b5f 100644
--- a/crypto.hpp
+++ b/crypto.hpp
@@ -3,6 +3,8 @@
 
 #include <string>
 #include <cmath>
+#include <sstream>
+#include <iomanip>
 
 //Moving these to a seperate namespace for minimal global namespace cluttering does not work with clang++
 #include <openssl/evp.h>
@@ -75,6 +77,15 @@ namespace SimpleWeb {
             }
         };
         
+        /// Return hex string from bytes in input string.
+        static std::string to_hex_string(const std::string &input) {
+          std::stringstream hex_stream;
+          hex_stream << std::hex << std::internal << std::setfill('0');
+          for (auto &byte : input)
+            hex_stream << std::setw(2) << (int)(unsigned char)byte;
+          return hex_stream.str();
+        }
+        
         static std::string MD5(const std::string &input, size_t iterations=1) {
             std::string hash;