SamplerUtils.h

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#pragma once
// Version:     0.1
// Date:        09/05/2023
// Increment version & date when changed
#define CRUMPETS                                                                                                       \
    std::string { "5128bd6c2bc42ed6835d9d24ee0e7200cc8aeae68e18e9f1ea3f6cd52cc082a8" }
 
#define TEA                                                                                                            \
    std::string { "ff26827f8059e3866680c22a95a7f97358c5a02924c82ef53a7b1259d5d31637" }
 
namespace krotos
{
    // Dummy class for content protection
    class SamplerUtils
    {
      public:
        static std::string getSampleHash(const File& path)
        {
            auto pathHash = juce::MD5(path.getFullPathName().toUTF8()).toHexString();
            auto nameHash = juce::MD5(path.getFileName().toUTF8()).toHexString();
            return (pathHash + nameHash).toStdString();
        }
 
        static void getSampleMetadata(const std::string& input, unsigned char* byteArray)
        {
            for (size_t i = 0, j = 0; i < input.length(); i += 2, j++)
            {
                std::string byteStr = input.substr(i, 2);
                unsigned int byteValue;
                std::istringstream(byteStr) >> std::hex >> byteValue;
                byteArray[j] = static_cast<unsigned char>(byteValue);
            }
        }
 
        static bool verifySampleHash(const juce::String& hash, const juce::String& sample)
        {
            auto checksum = juce::MD5((hash + getInitData()).toUTF8()).toHexString();
 
            auto metadataSum = juce::MD5((hash + TEA).toUTF8()).toHexString();
 
            return metadataSum == sample;
        }
 
        static const juce::String& getInitData()
        {
            static const juce::String salt = "334647ab85deb0103d194556d290a4b8f17457939d3cb8b56793270c5ba4a4a5";
            return salt;
        }
    };
 
} // namespace krotos