From 354bb40e75d94466e91fe6960523612c9d17ccfb Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Thu, 2 Nov 2017 23:11:29 +0300
Subject: Add implementation

---
 mysql/extra/yassl/taocrypt/src/random.cpp | 138 ++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 mysql/extra/yassl/taocrypt/src/random.cpp

(limited to 'mysql/extra/yassl/taocrypt/src/random.cpp')

diff --git a/mysql/extra/yassl/taocrypt/src/random.cpp b/mysql/extra/yassl/taocrypt/src/random.cpp
new file mode 100644
index 0000000..26dae7d
--- /dev/null
+++ b/mysql/extra/yassl/taocrypt/src/random.cpp
@@ -0,0 +1,138 @@
+/*
+   Copyright (c) 2000, 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; see the file COPYING. If not, write to the
+   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+   MA  02110-1301  USA.
+*/
+
+
+/* random.cpp implements a crypto secure Random Number Generator using an OS
+   specific seed, switch to /dev/random for more security but may block
+*/
+
+#include "runtime.hpp"
+#include "random.hpp"
+#include <string.h>
+#include <time.h>
+
+#if defined(_WIN32)
+    #include <windows.h>
+    #include <wincrypt.h>
+#else
+    #include <errno.h>
+    #include <fcntl.h>
+    #include <unistd.h>
+#endif // _WIN32
+
+namespace TaoCrypt {
+
+
+// Get seed and key cipher
+RandomNumberGenerator::RandomNumberGenerator()
+{
+    byte key[32];
+    byte junk[256];
+
+    seed_.GenerateSeed(key, sizeof(key));
+    cipher_.SetKey(key, sizeof(key));
+    GenerateBlock(junk, sizeof(junk));  // rid initial state
+}
+
+
+// place a generated block in output
+void RandomNumberGenerator::GenerateBlock(byte* output, word32 sz)
+{
+    memset(output, 0, sz);
+    cipher_.Process(output, output, sz);
+}
+
+
+byte RandomNumberGenerator::GenerateByte()
+{
+    byte b;
+    GenerateBlock(&b, 1);
+
+    return b;
+}
+
+
+#if defined(_WIN32)
+
+/* The OS_Seed implementation for windows */
+
+OS_Seed::OS_Seed()
+{
+    if(!CryptAcquireContext(&handle_, 0, 0, PROV_RSA_FULL,
+                             CRYPT_VERIFYCONTEXT))
+        error_.SetError(WINCRYPT_E);
+}
+
+
+OS_Seed::~OS_Seed()
+{
+    CryptReleaseContext(handle_, 0);
+}
+
+
+void OS_Seed::GenerateSeed(byte* output, word32 sz)
+{
+    if (!CryptGenRandom(handle_, sz, output))
+        error_.SetError(CRYPTGEN_E);
+}
+
+
+#else
+
+/* The default OS_Seed implementation */
+
+OS_Seed::OS_Seed()
+{
+    fd_ = open("/dev/urandom",O_RDONLY);
+    if (fd_ == -1) {
+        fd_ = open("/dev/random",O_RDONLY);
+        if (fd_ == -1)
+            error_.SetError(OPEN_RAN_E);
+    }
+}
+
+
+OS_Seed::~OS_Seed() 
+{
+    close(fd_);
+}
+
+
+// may block
+void OS_Seed::GenerateSeed(byte* output, word32 sz)
+{
+    while (sz) {
+        int len = read(fd_, output, sz);
+        if (len == -1) {
+            error_.SetError(READ_RAN_E);
+            return;
+        }
+
+        sz     -= len;
+        output += len;
+
+        if (sz)
+            sleep(1);
+    }
+}
+
+#endif // _WIN32
+
+
+
+} // namespace
-- 
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