2016 day5

1 files changed, 27 insertions, 0 deletions

diff --git a/src/2016/day5/aoc.cpp b/src/2016/day5/aoc.cpp
index 55f4247..16c5f70 100644
--- a/src/2016/day5/aoc.cpp
+++ b/src/2016/day5/aoc.cpp
@@ -1,5 +1,32 @@
 #include "aoc.h"
+#include "md5.h"
+#include <string.h>
 
 namespace aoc2016 {
 
+void day5(const char* secret, int len, char pass1[], char pass2[]) {
+  char buf[128] = {0};
+  int l = strlen(secret);
+  memcpy(buf, secret, len);
+  int64_t i = 0;
+  int x1 = len;
+  int x2 = 0;
+  while (i < INT64_MAX && x2 < 8) {
+    sprintf(buf + l, "%zu", i);
+    char* hash = md5sum(buf);
+    if (lead_zeros(hash) >= 5) {
+      printf("%zu %s\n", i, hash);
+      if (x1 > 0) {
+        pass1[len - x1] = hash[5];
+        x1--;
+      }
+      if (hash[5] >= '0' && hash[5] <= '7' && pass2[hash[5] - '0'] == '\0') {
+        pass2[hash[5] - '0'] = hash[6];
+        x2 += 1;
+      }
+    }
+    i++;
+  }
 }
+
+} // namespace aoc2016