1 files changed, 60 insertions, 0 deletions
diff --git a/external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/crypto_stream/salsa208/ref/xor_salsa208.c b/external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/crypto_stream/salsa208/ref/xor_salsa208.c
new file mode 100644
index 00000000..de0eae9f
--- /dev/null
+++ b/external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/crypto_stream/salsa208/ref/xor_salsa208.c
@@ -0,0 +1,60 @@
+/*
+version 20140420
+D. J. Bernstein
+Public domain.
+*/
+
+#include "api.h"
+#include "crypto_core_salsa208.h"
+#include "utils.h"
+
+typedef unsigned int uint32;
+
+static const unsigned char sigma[16] = {
+    'e', 'x', 'p', 'a', 'n', 'd', ' ', '3', '2', '-', 'b', 'y', 't', 'e', ' ', 'k'
+};
+
+int crypto_stream_xor(
+        unsigned char *c,
+  const unsigned char *m,unsigned long long mlen,
+  const unsigned char *n,
+  const unsigned char *k
+)
+{
+  unsigned char in[16];
+  unsigned char block[64];
+  unsigned char kcopy[32];
+  unsigned int i;
+  unsigned int u;
+
+  if (!mlen) return 0;
+
+  for (i = 0;i < 32;++i) kcopy[i] = k[i];
+  for (i = 0;i < 8;++i) in[i] = n[i];
+  for (i = 8;i < 16;++i) in[i] = 0;
+
+  while (mlen >= 64) {
+    crypto_core_salsa208(block,in,kcopy,sigma);
+    for (i = 0;i < 64;++i) c[i] = m[i] ^ block[i];
+
+    u = 1;
+    for (i = 8;i < 16;++i) {
+      u += (unsigned int) in[i];
+      in[i] = u;
+      u >>= 8;
+    }
+
+    mlen -= 64;
+    c += 64;
+    m += 64;
+  }
+
+  if (mlen) {
+    crypto_core_salsa208(block,in,kcopy,sigma);
+    for (i = 0;i < (unsigned int) mlen;++i) c[i] = m[i] ^ block[i];
+  }
+  sodium_memzero(block, sizeof block);
+  sodium_memzero(kcopy, sizeof kcopy);
+
+  return 0;
+}