From e2967396ac73cb7410787886cdaf072a184ffc49 Mon Sep 17 00:00:00 2001
From: irungentoo <irungentoo@gmail.com>
Date: Tue, 2 Jul 2013 09:53:34 -0400
Subject: Added NaCl crypto library.

---
 nacl/crypto_hash/try.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 nacl/crypto_hash/try.c

(limited to 'nacl/crypto_hash/try.c')

diff --git a/nacl/crypto_hash/try.c b/nacl/crypto_hash/try.c
new file mode 100644
index 00000000..fab49c99
--- /dev/null
+++ b/nacl/crypto_hash/try.c
@@ -0,0 +1,77 @@
+/*
+ * crypto_hash/try.c version 20090118
+ * D. J. Bernstein
+ * Public domain.
+ */
+
+#include <stdlib.h>
+#include "crypto_hash.h"
+
+extern unsigned char *alignedcalloc(unsigned long long);
+
+const char *primitiveimplementation = crypto_hash_IMPLEMENTATION;
+
+#define MAXTEST_BYTES (10000 + crypto_hash_BYTES)
+#define CHECKSUM_BYTES 4096
+#define TUNE_BYTES 1536
+
+static unsigned char *h;
+static unsigned char *h2;
+static unsigned char *m;
+static unsigned char *m2;
+
+void preallocate(void)
+{
+}
+
+void allocate(void)
+{
+  h = alignedcalloc(crypto_hash_BYTES);
+  h2 = alignedcalloc(crypto_hash_BYTES);
+  m = alignedcalloc(MAXTEST_BYTES);
+  m2 = alignedcalloc(MAXTEST_BYTES);
+}
+
+void predoit(void)
+{
+}
+
+void doit(void)
+{
+  crypto_hash(h,m,TUNE_BYTES);
+}
+
+char checksum[crypto_hash_BYTES * 2 + 1];
+
+const char *checksum_compute(void)
+{
+  long long i;
+  long long j;
+
+  for (i = 0;i < CHECKSUM_BYTES;++i) {
+    long long hlen = crypto_hash_BYTES;
+    long long mlen = i;
+    for (j = -16;j < 0;++j) h[j] = random();
+    for (j = hlen;j < hlen + 16;++j) h[j] = random();
+    for (j = -16;j < hlen + 16;++j) h2[j] = h[j];
+    for (j = -16;j < 0;++j) m[j] = random();
+    for (j = mlen;j < mlen + 16;++j) m[j] = random();
+    for (j = -16;j < mlen + 16;++j) m2[j] = m[j];
+    if (crypto_hash(h,m,mlen) != 0) return "crypto_hash returns nonzero";
+    for (j = -16;j < mlen + 16;++j) if (m2[j] != m[j]) return "crypto_hash writes to input";
+    for (j = -16;j < 0;++j) if (h2[j] != h[j]) return "crypto_hash writes before output";
+    for (j = hlen;j < hlen + 16;++j) if (h2[j] != h[j]) return "crypto_hash writes after output";
+    if (crypto_hash(m2,m2,mlen) != 0) return "crypto_hash returns nonzero";
+    for (j = 0;j < hlen;++j) if (m2[j] != h[j]) return "crypto_hash does not handle overlap";
+    for (j = 0;j < mlen;++j) m[j] ^= h[j % hlen];
+    m[mlen] = h[0];
+  }
+  if (crypto_hash(h,m,CHECKSUM_BYTES) != 0) return "crypto_hash returns nonzero";
+
+  for (i = 0;i < crypto_hash_BYTES;++i) {
+    checksum[2 * i] = "0123456789abcdef"[15 & (h[i] >> 4)];
+    checksum[2 * i + 1] = "0123456789abcdef"[15 & h[i]];
+  }
+  checksum[2 * i] = 0;
+  return 0;
+}
-- 
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