1 files changed, 0 insertions, 192 deletions
diff --git a/xmss_wots.c b/xmss_wots.c
deleted file mode 100644
index 993e661f6707..000000000000
--- a/xmss_wots.c
+++ /dev/null
@@ -1,192 +0,0 @@
-/* $OpenBSD: xmss_wots.c,v 1.3 2018/04/10 00:10:49 djm Exp $ */
-/*
-wots.c version 20160722
-Andreas Hülsing
-Joost Rijneveld
-Public domain.
-*/
-
-#include "includes.h"
-#ifdef WITH_XMSS
-
-#include <stdlib.h>
-#ifdef HAVE_STDINT_H
-# include <stdint.h>
-#endif
-#include <limits.h>
-#include "xmss_commons.h"
-#include "xmss_hash.h"
-#include "xmss_wots.h"
-#include "xmss_hash_address.h"
-
-
-/* libm-free version of log2() for wots */
-static inline int
-wots_log2(uint32_t v)
-{
-  int      b;
-
-  for (b = sizeof (v) * CHAR_BIT - 1; b >= 0; b--) {
-    if ((1U << b) & v) {
-      return b;
-    }
-  }
-  return 0;
-}
-
-void
-wots_set_params(wots_params *params, int n, int w)
-{
-  params->n = n;
-  params->w = w;
-  params->log_w = wots_log2(params->w);
-  params->len_1 = (CHAR_BIT * n) / params->log_w;
-  params->len_2 = (wots_log2(params->len_1 * (w - 1)) / params->log_w) + 1;
-  params->len = params->len_1 + params->len_2;
-  params->keysize = params->len * params->n;
-}
-
-/**
- * Helper method for pseudorandom key generation
- * Expands an n-byte array into a len*n byte array
- * this is done using PRF
- */
-static void expand_seed(unsigned char *outseeds, const unsigned char *inseed, const wots_params *params)
-{
-  uint32_t i = 0;
-  unsigned char ctr[32];
-  for(i = 0; i < params->len; i++){
-    to_byte(ctr, i, 32);
-    prf((outseeds + (i*params->n)), ctr, inseed, params->n);
-  }
-}
-
-/**
- * Computes the chaining function.
- * out and in have to be n-byte arrays
- *
- * interprets in as start-th value of the chain
- * addr has to contain the address of the chain
- */
-static void gen_chain(unsigned char *out, const unsigned char *in, unsigned int start, unsigned int steps, const wots_params *params, const unsigned char *pub_seed, uint32_t addr[8])
-{
-  uint32_t i, j;
-  for (j = 0; j < params->n; j++)
-    out[j] = in[j];
-
-  for (i = start; i < (start+steps) && i < params->w; i++) {
-    setHashADRS(addr, i);
-    hash_f(out, out, pub_seed, addr, params->n);
-  }
-}
-
-/**
- * base_w algorithm as described in draft.
- *
- *
- */
-static void base_w(int *output, const int out_len, const unsigned char *input, const wots_params *params)
-{
-  int in = 0;
-  int out = 0;
-  uint32_t total = 0;
-  int bits = 0;
-  int consumed = 0;
-
-  for (consumed = 0; consumed < out_len; consumed++) {
-    if (bits == 0) {
-      total = input[in];
-      in++;
-      bits += 8;
-    }
-    bits -= params->log_w;
-    output[out] = (total >> bits) & (params->w - 1);
-    out++;
-  }
-}
-
-void wots_pkgen(unsigned char *pk, const unsigned char *sk, const wots_params *params, const unsigned char *pub_seed, uint32_t addr[8])
-{
-  uint32_t i;
-  expand_seed(pk, sk, params);
-  for (i=0; i < params->len; i++) {
-    setChainADRS(addr, i);
-    gen_chain(pk+i*params->n, pk+i*params->n, 0, params->w-1, params, pub_seed, addr);
-  }
-}
-
-
-int wots_sign(unsigned char *sig, const unsigned char *msg, const unsigned char *sk, const wots_params *params, const unsigned char *pub_seed, uint32_t addr[8])
-{
-  //int basew[params->len];
-  int csum = 0;
-  uint32_t i = 0;
-  int *basew = calloc(params->len, sizeof(int));
-  if (basew == NULL)
-    return -1;
-
-  base_w(basew, params->len_1, msg, params);
-
-  for (i=0; i < params->len_1; i++) {
-    csum += params->w - 1 - basew[i];
-  }
-
-  csum = csum << (8 - ((params->len_2 * params->log_w) % 8));
-
-  int len_2_bytes = ((params->len_2 * params->log_w) + 7) / 8;
-
-  unsigned char csum_bytes[len_2_bytes];
-  to_byte(csum_bytes, csum, len_2_bytes);
-
-  int csum_basew[params->len_2];
-  base_w(csum_basew, params->len_2, csum_bytes, params);
-
-  for (i = 0; i < params->len_2; i++) {
-    basew[params->len_1 + i] = csum_basew[i];
-  }
-
-  expand_seed(sig, sk, params);
-
-  for (i = 0; i < params->len; i++) {
-    setChainADRS(addr, i);
-    gen_chain(sig+i*params->n, sig+i*params->n, 0, basew[i], params, pub_seed, addr);
-  }
-  free(basew);
-  return 0;
-}
-
-int wots_pkFromSig(unsigned char *pk, const unsigned char *sig, const unsigned char *msg, const wots_params *params, const unsigned char *pub_seed, uint32_t addr[8])
-{
-  int csum = 0;
-  uint32_t i = 0;
-  int *basew = calloc(params->len, sizeof(int));
-  if (basew == NULL)
-    return -1;
-
-  base_w(basew, params->len_1, msg, params);
-
-  for (i=0; i < params->len_1; i++) {
-    csum += params->w - 1 - basew[i];
-  }
-
-  csum = csum << (8 - ((params->len_2 * params->log_w) % 8));
-
-  int len_2_bytes = ((params->len_2 * params->log_w) + 7) / 8;
-
-  unsigned char csum_bytes[len_2_bytes];
-  to_byte(csum_bytes, csum, len_2_bytes);
-
-  int csum_basew[params->len_2];
-  base_w(csum_basew, params->len_2, csum_bytes, params);
-
-  for (i = 0; i < params->len_2; i++) {
-    basew[params->len_1 + i] = csum_basew[i];
-  }
-  for (i=0; i < params->len; i++) {
-    setChainADRS(addr, i);
-    gen_chain(pk+i*params->n, sig+i*params->n, basew[i], params->w-1-basew[i], params, pub_seed, addr);
-  }
-  free(basew);
-  return 0;
-}
-#endif /* WITH_XMSS */