preparing to build tox from sources

1 files changed, 95 insertions, 0 deletions

diff --git a/libs/libsodium/src/crypto_core/hsalsa20/ref2/core_hsalsa20_ref2.c b/libs/libsodium/src/crypto_core/hsalsa20/ref2/core_hsalsa20_ref2.c
new file mode 100644
index 0000000000..1d1220fee2
--- /dev/null
+++ b/libs/libsodium/src/crypto_core/hsalsa20/ref2/core_hsalsa20_ref2.c
@@ -0,0 +1,95 @@
+/*
+version 20080912
+D. J. Bernstein
+Public domain.
+*/
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "crypto_core_hsalsa20.h"
+#include "private/common.h"
+
+#define ROUNDS 20
+#define U32C(v) (v##U)
+
+int
+crypto_core_hsalsa20(unsigned char *out,
+                     const unsigned char *in,
+                     const unsigned char *k,
+                     const unsigned char *c)
+{
+    uint32_t x0, x1, x2, x3, x4, x5, x6, x7, x8,
+             x9, x10, x11, x12, x13, x14,  x15;
+    int      i;
+
+    if (c == NULL) {
+        x0 = U32C(0x61707865);
+        x5 = U32C(0x3320646e);
+        x10 = U32C(0x79622d32);
+        x15 = U32C(0x6b206574);
+    } else {
+        x0 = LOAD32_LE(c + 0);
+        x5 = LOAD32_LE(c + 4);
+        x10 = LOAD32_LE(c + 8);
+        x15 = LOAD32_LE(c + 12);
+    }
+    x1 = LOAD32_LE(k + 0);
+    x2 = LOAD32_LE(k + 4);
+    x3 = LOAD32_LE(k + 8);
+    x4 = LOAD32_LE(k + 12);
+    x11 = LOAD32_LE(k + 16);
+    x12 = LOAD32_LE(k + 20);
+    x13 = LOAD32_LE(k + 24);
+    x14 = LOAD32_LE(k + 28);
+    x6 = LOAD32_LE(in + 0);
+    x7 = LOAD32_LE(in + 4);
+    x8 = LOAD32_LE(in + 8);
+    x9 = LOAD32_LE(in + 12);
+
+    for (i = ROUNDS; i > 0; i -= 2) {
+        x4 ^= ROTL32(x0 + x12, 7);
+        x8 ^= ROTL32(x4 + x0, 9);
+        x12 ^= ROTL32(x8 + x4, 13);
+        x0 ^= ROTL32(x12 + x8, 18);
+        x9 ^= ROTL32(x5 + x1, 7);
+        x13 ^= ROTL32(x9 + x5, 9);
+        x1 ^= ROTL32(x13 + x9, 13);
+        x5 ^= ROTL32(x1 + x13, 18);
+        x14 ^= ROTL32(x10 + x6, 7);
+        x2 ^= ROTL32(x14 + x10, 9);
+        x6 ^= ROTL32(x2 + x14, 13);
+        x10 ^= ROTL32(x6 + x2, 18);
+        x3 ^= ROTL32(x15 + x11, 7);
+        x7 ^= ROTL32(x3 + x15, 9);
+        x11 ^= ROTL32(x7 + x3, 13);
+        x15 ^= ROTL32(x11 + x7, 18);
+        x1 ^= ROTL32(x0 + x3, 7);
+        x2 ^= ROTL32(x1 + x0, 9);
+        x3 ^= ROTL32(x2 + x1, 13);
+        x0 ^= ROTL32(x3 + x2, 18);
+        x6 ^= ROTL32(x5 + x4, 7);
+        x7 ^= ROTL32(x6 + x5, 9);
+        x4 ^= ROTL32(x7 + x6, 13);
+        x5 ^= ROTL32(x4 + x7, 18);
+        x11 ^= ROTL32(x10 + x9, 7);
+        x8 ^= ROTL32(x11 + x10, 9);
+        x9 ^= ROTL32(x8 + x11, 13);
+        x10 ^= ROTL32(x9 + x8, 18);
+        x12 ^= ROTL32(x15 + x14, 7);
+        x13 ^= ROTL32(x12 + x15, 9);
+        x14 ^= ROTL32(x13 + x12, 13);
+        x15 ^= ROTL32(x14 + x13, 18);
+    }
+
+    STORE32_LE(out + 0, x0);
+    STORE32_LE(out + 4, x5);
+    STORE32_LE(out + 8, x10);
+    STORE32_LE(out + 12, x15);
+    STORE32_LE(out + 16, x6);
+    STORE32_LE(out + 20, x7);
+    STORE32_LE(out + 24, x8);
+    STORE32_LE(out + 28, x9);
+
+    return 0;
+}