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| author | Jeffrey Walton <noloader@gmail.com> | 2018-12-24 17:17:32 -0500 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-12-24 17:17:32 -0500 |
| commit | d62674b56145b6988cd0a9d8a658dff7cb6d8ec8 (patch) | |
| tree | a30dc4f20697961ba0f347da15a112e38d88cfab /donna_sse.h | |
| parent | 2ba3c1fc73ff490fa335ae649f3ab42e762369f8 (diff) | |
| download | cryptopp-git-d62674b56145b6988cd0a9d8a658dff7cb6d8ec8.tar.gz | |
Add ed25519 (GH #764, PR #767)
Add ed25519
Diffstat (limited to 'donna_sse.h')
| -rw-r--r-- | donna_sse.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/donna_sse.h b/donna_sse.h new file mode 100644 index 00000000..4569471b --- /dev/null +++ b/donna_sse.h @@ -0,0 +1,84 @@ +// donna_sse.h - written and placed in public domain by Jeffrey Walton
+// Crypto++ specific implementation wrapped around Andrew
+// Moon's public domain curve25519-donna and ed25519-donna,
+// https://github.com/floodyberry/curve25519-donna and
+// https://github.com/floodyberry/ed25519-donna.
+
+// This source file multiplexes two different repos using namespaces. This
+// was a little easier from a project management standpoint. We only need
+// two files per architecture at the expense of namespaces and bloat.
+
+#ifndef CRYPTOPP_DONNA_SSE_H
+#define CRYPTOPP_DONNA_SSE_H
+
+#include "config.h"
+#include <emmintrin.h>
+
+NAMESPACE_BEGIN(CryptoPP)
+NAMESPACE_BEGIN(Donna)
+NAMESPACE_BEGIN(ArchSSE)
+
+using CryptoPP::byte;
+using CryptoPP::word32;
+
+typedef __m128i xmmi;
+#define ALIGN(n) CRYPTOPP_ALIGN_DATA(n)
+
+typedef union packedelem8_t {
+ byte u[16];
+ xmmi v;
+} packedelem8;
+
+typedef union packedelem32_t {
+ word32 u[4];
+ xmmi v;
+} packedelem32;
+
+typedef union packedelem64_t {
+ word64 u[2];
+ xmmi v;
+} packedelem64;
+
+/* 10 elements + an extra 2 to fit in 3 xmm registers */
+typedef word32 bignum25519[12];
+typedef packedelem32 packed32bignum25519[5];
+typedef packedelem64 packed64bignum25519[10];
+
+const word32 reduce_mask_26 = (1 << 26) - 1;
+const word32 reduce_mask_25 = (1 << 25) - 1;
+
+const packedelem32 sse2_bot32bitmask = {{0xffffffff, 0x00000000, 0xffffffff, 0x00000000}};
+const packedelem32 sse2_top32bitmask = {{0x00000000, 0xffffffff, 0x00000000, 0xffffffff}};
+const packedelem32 sse2_top64bitmask = {{0x00000000, 0x00000000, 0xffffffff, 0xffffffff}};
+const packedelem32 sse2_bot64bitmask = {{0xffffffff, 0xffffffff, 0x00000000, 0x00000000}};
+
+/* reduction masks */
+const packedelem64 packedmask26 = {{0x03ffffff, 0x03ffffff}};
+const packedelem64 packedmask25 = {{0x01ffffff, 0x01ffffff}};
+const packedelem32 packedmask2625 = {{0x3ffffff,0,0x1ffffff,0}};
+const packedelem32 packedmask26262626 = {{0x03ffffff, 0x03ffffff, 0x03ffffff, 0x03ffffff}};
+const packedelem32 packedmask25252525 = {{0x01ffffff, 0x01ffffff, 0x01ffffff, 0x01ffffff}};
+
+/* multipliers */
+const packedelem64 packednineteen = {{19, 19}};
+const packedelem64 packednineteenone = {{19, 1}};
+const packedelem64 packedthirtyeight = {{38, 38}};
+const packedelem64 packed3819 = {{19*2,19}};
+const packedelem64 packed9638 = {{19*4,19*2}};
+
+/* 121666,121665 */
+const packedelem64 packed121666121665 = {{121666, 121665}};
+
+/* 2*(2^255 - 19) = 0 mod p */
+const packedelem32 packed2p0 = {{0x7ffffda,0x3fffffe,0x7fffffe,0x3fffffe}};
+const packedelem32 packed2p1 = {{0x7fffffe,0x3fffffe,0x7fffffe,0x3fffffe}};
+const packedelem32 packed2p2 = {{0x7fffffe,0x3fffffe,0x0000000,0x0000000}};
+
+const packedelem32 packed32zeromodp0 = {{0x7ffffda,0x7ffffda,0x3fffffe,0x3fffffe}};
+const packedelem32 packed32zeromodp1 = {{0x7fffffe,0x7fffffe,0x3fffffe,0x3fffffe}};
+
+NAMESPACE_END // ArchSSE
+NAMESPACE_END // Donna
+NAMESPACE_END // CryptoPP
+
+#endif // CRYPTOPP_DONNA_SSE_H
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