initial commit

sbox/gen-static-sbox.c

@@ -0,0 +1,58 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <ctype.h>
+#include <math.h>
+
+typedef uint8_t  byte;
+typedef uint32_t word;
+typedef uint16_t half;
+
+#define MAX 4096
+
+void dump256(byte *hash) {
+  int i, b = 1;
+  
+  for(i=0; i<256; i++) {
+    fprintf(stderr, "0x%02x, ", hash[i]);
+    if(b == 16) {
+      fprintf(stderr, "\n");
+      b = 1;
+    }
+    else
+      b++;
+  }
+
+  fprintf(stderr, "\n");
+}
+
+int main() {
+  byte raw[MAX];
+  byte hash[256] = {0}, reg[256] = {0}, out;
+  int i, b=0, has=0;
+  
+  fread(raw, MAX, 1, stdin);
+
+  memset(hash, 0, 256);
+  
+  for (i=0; i<MAX; i++) {
+    out = raw[i];
+    if(reg[out] == 0) {
+      reg[out]++;
+      hash[b++] = out;
+      has++;
+    }
+    if(has == 256) {
+      dump256(hash);
+      has = b = 0;
+      memset(hash, 0, 256);
+      memset(reg, 0, 256);
+    }
+  }
+
+  //fwrite(hash, 256, 1, stdout);
+  fprintf(stderr, "done\n");
+  return 0;
+}