1 files changed, 46 insertions, 0 deletions

diff --git a/nacl/tests/auth6.cpp b/nacl/tests/auth6.cpp
new file mode 100644
index 00000000..dffb6388
--- /dev/null
+++ b/nacl/tests/auth6.cpp
@@ -0,0 +1,46 @@
+#include <string>
+using std::string;
+#include <stdio.h>
+#include <stdlib.h>
+#include "crypto_auth_hmacsha512256.h"
+#include "randombytes.h"
+
+main()
+{
+  int clen;
+  int i;
+  for (clen = 0;clen < 10000;++clen) {
+    unsigned char key_bytes[32];
+    randombytes(key_bytes,sizeof key_bytes);
+    string key((char *) key_bytes,sizeof key_bytes);
+    unsigned char c_bytes[clen];
+    randombytes(c_bytes,sizeof c_bytes);
+    string c((char *) c_bytes,sizeof c_bytes);
+    string a = crypto_auth_hmacsha512256(c,key);
+    try {
+      crypto_auth_hmacsha512256_verify(a,c,key);
+    } catch(const char *s) {
+      printf("fail %d %s\n",clen,s);
+      return 100;
+    }
+    if (clen > 0) {
+      size_t pos = random() % clen;
+      c.replace(pos,1,1,c[pos] + 1 + (random() % 255));
+      try {
+        crypto_auth_hmacsha512256_verify(a,c,key);
+        printf("forgery %d\n",clen);
+      } catch(const char *s) {
+        ;
+      }
+      pos = random() % a.size();
+      a.replace(pos,1,1,a[pos] + 1 + (random() % 255));
+      try {
+        crypto_auth_hmacsha512256_verify(a,c,key);
+        printf("forgery %d\n",clen);
+      } catch(const char *s) {
+        ;
+      }
+    }
+  }
+  return 0;
+}