restructure project

ixcrypto/ixcrypto/IXHMac.cpp

@@ -0,0 +1,46 @@
+/*
+ *  IXHMac.h
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2018 Machine Zone. All rights reserved.
+ */
+
+#include "IXHMac.h"
+#include "IXBase64.h"
+
+#if defined(IXWEBSOCKET_USE_MBED_TLS)
+# include <mbedtls/md.h>
+#elif defined(__APPLE__)
+# include <CommonCrypto/CommonHMAC.h>
+#else
+# include <openssl/hmac.h>
+#endif
+
+namespace ix
+{
+    std::string hmac(const std::string& data, const std::string& key)
+    {
+        constexpr size_t hashSize = 16;
+        unsigned char hash[hashSize];
+
+#if defined(IXWEBSOCKET_USE_MBED_TLS)
+        mbedtls_md_hmac(mbedtls_md_info_from_type(MBEDTLS_MD_MD5),
+               (unsigned char *) key.c_str(), key.size(),
+               (unsigned char *) data.c_str(), data.size(),
+               (unsigned char *) &hash);
+#elif defined(__APPLE__)
+        CCHmac(kCCHmacAlgMD5,
+               key.c_str(), key.size(),
+               data.c_str(), data.size(),
+               &hash);
+#else
+        HMAC(EVP_md5(),
+             key.c_str(), (int) key.size(),
+             (unsigned char *) data.c_str(), (int) data.size(),
+             (unsigned char *) hash, nullptr);
+#endif
+
+        std::string hashString(reinterpret_cast<char*>(hash), hashSize);
+
+        return base64_encode(hashString, (uint32_t) hashString.size());
+    }
+}