1 files changed, 54 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/pbkdf/pbkdf1/pbkdf1.cpp b/comm/third_party/botan/src/lib/pbkdf/pbkdf1/pbkdf1.cpp
new file mode 100644
index 0000000000..ad922ce9c6
--- /dev/null
+++ b/comm/third_party/botan/src/lib/pbkdf/pbkdf1/pbkdf1.cpp
@@ -0,0 +1,54 @@
+/*
+* PBKDF1
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/pbkdf1.h>
+#include <botan/exceptn.h>
+
+namespace Botan {
+
+size_t PKCS5_PBKDF1::pbkdf(uint8_t output_buf[], size_t output_len,
+                           const std::string& passphrase,
+                           const uint8_t salt[], size_t salt_len,
+                           size_t iterations,
+                           std::chrono::milliseconds msec) const
+   {
+   if(output_len > m_hash->output_length())
+      throw Invalid_Argument("PKCS5_PBKDF1: Requested output length too long");
+
+   m_hash->update(passphrase);
+   m_hash->update(salt, salt_len);
+   secure_vector<uint8_t> key = m_hash->final();
+
+   const auto start = std::chrono::high_resolution_clock::now();
+   size_t iterations_performed = 1;
+
+   while(true)
+      {
+      if(iterations == 0)
+         {
+         if(iterations_performed % 10000 == 0)
+            {
+            auto time_taken = std::chrono::high_resolution_clock::now() - start;
+            auto msec_taken = std::chrono::duration_cast<std::chrono::milliseconds>(time_taken);
+            if(msec_taken > msec)
+               break;
+            }
+         }
+      else if(iterations_performed == iterations)
+         break;
+
+      m_hash->update(key);
+      m_hash->final(key.data());
+
+      ++iterations_performed;
+      }
+
+   copy_mem(output_buf, key.data(), output_len);
+   return iterations_performed;
+   }
+
+}