LTS Commits

lib/encryption.cpp

@@ -0,0 +1,62 @@
+#include "encryption.h"
+#include "auth.h"
+//#include <openssl/aes.h>
+#include <cstdlib>
+#include <cstring>
+#include <iomanip>
+#include <cstdio>
+#include <cstdio>
+
+namespace Encryption {
+  std::string AES_Crypt(const std::string & data, const std::string & key, std::string & ivec) {
+    unsigned char * outData = (unsigned char *)malloc(data.size() * sizeof(char));
+    //unsigned int stateNum = 0;
+    unsigned char stateEcount[16];
+    unsigned char stateIvec[16];
+    memset(stateEcount, 0, 16);
+    memcpy(stateIvec, ivec.c_str(), 8);
+    memset(stateIvec + 8, 0, 8);
+    /// \todo Implement this ^_^
+    //AES_KEY cryptKey;
+    //if (AES_set_encrypt_key((unsigned char *)key.c_str(), 128, &cryptKey)) {
+    //  abort();
+    //}
+    /// \todo loop per 128 bytes....
+    //AES_ctr128_encrypt((unsigned char *)data.c_str(), outData, data.size(), &cryptKey, stateIvec, stateEcount, &stateNum);
+    std::string result = std::string((char *)outData, data.size());
+    free(outData);
+    return result;
+  }
+
+  std::string PR_GenerateContentKey(std::string & keyseed, std::string & keyid) {
+    char contentKey[16];
+    char dataBlob[92];
+    char keyA[32], keyB[32], keyC[32];
+    std::string keyidBytes = PR_GuidToByteArray(keyid);
+    memcpy(dataBlob,  keyseed.c_str(), 30);
+    memcpy(dataBlob+30, keyidBytes.data(), 16);
+    memcpy(dataBlob+46, keyseed.c_str(), 30);
+    memcpy(dataBlob+76, keyidBytes.data(), 16);
+    Secure::sha256bin(dataBlob, 46, keyA);
+    Secure::sha256bin(dataBlob, 76, keyB);
+    Secure::sha256bin(dataBlob, 92, keyC);
+    for (int i = 0; i < 16; i++) {
+      contentKey[i] = keyA[i] ^ keyA[i + 16] ^ keyB[i] ^ keyB[i + 16] ^ keyC[i] ^ keyC[i + 16];
+    }
+    return std::string(contentKey, 16);
+  }
+
+  std::string PR_GuidToByteArray(std::string & guid) {
+    std::string result;
+    result = guid[3];
+    result += guid[2];
+    result += guid[1];
+    result += guid[0];
+    result += guid[5];
+    result += guid[4];
+    result += guid[7];
+    result += guid[6];
+    result += guid.substr(8);
+    return result;
+  }
+}