feat: add blowfish2 128 bit implementation

- regular blowfish only uses 64 bits
- blowfish2 uses 128 bits like AES

Signed-off-by: Avinal Kumar <avinal.xlvii@gmail.com>

tests/Main.cpp

@@ -1,12 +1,3 @@
-/**
- * /mnt/z/my_git/blowfish/src/Main.cpp
- * @file Main.cpp
- * @author Avinal Kumar
- * @since March 06, 2021
- *
- * Test Program
- */
-
 #include <iostream>
 
 #include <blowfish/blowfish.h>
@@ -59,6 +50,7 @@ int main(int argc, char const *argv[]) {
 
   std::cout << decipher << std::endl;
   if (message == decipher) {
+    std::cout << "Test successful!" << std::endl;
     return 0;
   } else {
     return 1;

tests/Main2.cpp

@@ -0,0 +1,58 @@
+#include <iostream>
+
+#include <blowfish/blowfish2.h>
+
+std::string from_uint(uint64_t sh) {
+  std::string re("");
+  for (int i = 0; i < 8; i++) {
+    re += (unsigned char)(sh >> i * 8);
+  }
+  return re;
+}
+
+int main(int argc, char const *argv[]) {
+  std::string key("test@pass47");
+  std::string message("My name is Avinal and I am cute and smart");
+  std::string cipher("");
+  int len = message.length();
+  int j = sizeof(uint64_t);
+  int rem =
+      ((len > j * 2) ? (((len / j * 2) + 1) * j * 2 - len) : (j * 2 - len));
+  message.append(rem, '\0');
+  len = message.length();
+  Blowfish2 blowfish(key);
+  std::cout << "My message is: " << message << std::endl;
+  uint64_t lm, rm;
+  for (size_t i = 0; i < len; i += 16) {
+    lm = 0;
+    rm = 0;
+    lm = *reinterpret_cast<uint64_t *>(
+        const_cast<char *>(message.substr(i, 8).c_str()));
+    rm = *reinterpret_cast<uint64_t *>(
+        const_cast<char *>(message.substr(i + 8, 8).c_str()));
+    blowfish.encrypt(lm, rm);
+    cipher += from_uint(lm) + from_uint(rm);
+  }
+  std::cout << cipher << std::endl;
+  std::string decipher("");
+  len = cipher.length();
+  std::cout << "length: " << len << std::endl;
+  for (size_t i = 0; i < len; i += 16) {
+    lm = 0;
+    rm = 0;
+    lm = *reinterpret_cast<uint64_t *>(
+        const_cast<char *>(cipher.substr(i, j).c_str()));
+    rm = *reinterpret_cast<uint64_t *>(
+        const_cast<char *>(cipher.substr(i + j, j).c_str()));
+    blowfish.decrypt(lm, rm);
+    decipher += from_uint(lm) + from_uint(rm);
+  }
+
+  std::cout << decipher << std::endl;
+  if (message == decipher) {
+    std::cout << "Test successful!" << std::endl;
+    return 0;
+  } else {
+    return 1;
+  }
+}