1 files changed, 59 insertions, 0 deletions
diff --git a/mysql/mysys_ssl/my_aes.cpp b/mysql/mysys_ssl/my_aes.cpp
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+++ b/mysql/mysys_ssl/my_aes.cpp
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+/* Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2 of the License.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
+
+
+#include <my_global.h>
+#include <m_string.h>
+#include <my_aes.h>
+#include "my_aes_impl.h"
+
+
+/**
+  Transforms an arbitrary long key into a fixed length AES key
+
+  AES keys are of fixed length. This routine takes an arbitrary long key
+  iterates over it in AES key length increment and XORs the bytes with the
+  AES key buffer being prepared.
+  The bytes from the last incomplete iteration are XORed to the start
+  of the key until their depletion.
+  Needed since crypto function routines expect a fixed length key.
+
+  @param key        [in]       Key to use for real key creation
+  @param key_length [in]       Length of the key
+  @param rkey       [out]      Real key (used by OpenSSL/YaSSL)
+  @param opmode     [out]      encryption mode
+*/
+
+void my_aes_create_key(const unsigned char *key, uint key_length,
+                       uint8 *rkey, enum my_aes_opmode opmode)
+{
+  const uint key_size= my_aes_opmode_key_sizes[opmode] / 8;
+  uint8 *rkey_end;                              /* Real key boundary */
+  uint8 *ptr;                                   /* Start of the real key*/
+  uint8 *sptr;                                  /* Start of the working key */
+  uint8 *key_end= ((uint8 *)key) + key_length;  /* Working key boundary*/
+
+  rkey_end= rkey + key_size;
+
+  memset(rkey, 0, key_size);          /* Set initial key  */
+
+  for (ptr= rkey, sptr= (uint8 *)key; sptr < key_end; ptr++, sptr++)
+  {
+    if (ptr == rkey_end)
+      /*  Just loop over tmp_key until we used all key */
+      ptr= rkey;
+    *ptr^= *sptr;
+  }
+}