Initial commit providing GOST 2012 algorithms.

[openssl-gost/engine.git] / gosthash2012_ref.h

diff --git a/gosthash2012_ref.h b/gosthash2012_ref.h
new file mode 100644 (file)
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--- /dev/null
+++ b/gosthash2012_ref.h
@@ -0,0 +1,63 @@
+/*
+ * Portable implementation of core functions for GOST R 34.11-2012.
+ *
+ * Copyright (c) 2013 Cryptocom LTD.
+ * This file is distributed under the same license as OpenSSL.
+ *
+ * Author: Alexey Degtyarev <alexey@renatasystems.org>
+ *
+ */
+
+#ifdef __GOST3411_HAS_SSE2__
+# error "GOST R 34.11-2012: portable implementation disabled in config.h"
+#endif
+
+#define X(x, y, z) { \
+    z->QWORD[0] = x->QWORD[0] ^ y->QWORD[0]; \
+    z->QWORD[1] = x->QWORD[1] ^ y->QWORD[1]; \
+    z->QWORD[2] = x->QWORD[2] ^ y->QWORD[2]; \
+    z->QWORD[3] = x->QWORD[3] ^ y->QWORD[3]; \
+    z->QWORD[4] = x->QWORD[4] ^ y->QWORD[4]; \
+    z->QWORD[5] = x->QWORD[5] ^ y->QWORD[5]; \
+    z->QWORD[6] = x->QWORD[6] ^ y->QWORD[6]; \
+    z->QWORD[7] = x->QWORD[7] ^ y->QWORD[7]; \
+}
+
+#ifndef __GOST3411_BIG_ENDIAN__
+# define __XLPS_FOR for (_i = 0; _i <= 7; _i++)
+# define _datai _i
+#else
+# define __XLPS_FOR for (_i = 7; _i >= 0; _i--)
+# define _datai 7 - _i
+#endif
+
+#define XLPS(x, y, data) { \
+    register unsigned long long r0, r1, r2, r3, r4, r5, r6, r7; \
+    int _i; \
+    \
+    r0 = x->QWORD[0] ^ y->QWORD[0]; \
+    r1 = x->QWORD[1] ^ y->QWORD[1]; \
+    r2 = x->QWORD[2] ^ y->QWORD[2]; \
+    r3 = x->QWORD[3] ^ y->QWORD[3]; \
+    r4 = x->QWORD[4] ^ y->QWORD[4]; \
+    r5 = x->QWORD[5] ^ y->QWORD[5]; \
+    r6 = x->QWORD[6] ^ y->QWORD[6]; \
+    r7 = x->QWORD[7] ^ y->QWORD[7]; \
+    \
+    \
+    __XLPS_FOR {\
+        data->QWORD[_datai]  = Ax[0][(r0 >> (_i << 3)) & 0xFF]; \
+        data->QWORD[_datai] ^= Ax[1][(r1 >> (_i << 3)) & 0xFF]; \
+        data->QWORD[_datai] ^= Ax[2][(r2 >> (_i << 3)) & 0xFF]; \
+        data->QWORD[_datai] ^= Ax[3][(r3 >> (_i << 3)) & 0xFF]; \
+        data->QWORD[_datai] ^= Ax[4][(r4 >> (_i << 3)) & 0xFF]; \
+        data->QWORD[_datai] ^= Ax[5][(r5 >> (_i << 3)) & 0xFF]; \
+        data->QWORD[_datai] ^= Ax[6][(r6 >> (_i << 3)) & 0xFF]; \
+        data->QWORD[_datai] ^= Ax[7][(r7 >> (_i << 3)) & 0xFF]; \
+    }\
+}
+
+#define ROUND(i, Ki, data) { \
+    XLPS(Ki, (&C[i]), Ki); \
+    XLPS(Ki, data, data); \
+}