1 files changed, 0 insertions, 62 deletions
diff --git a/libs/libaxolotl/src/curve25519/ed25519/additions/usign_modified.c b/libs/libaxolotl/src/curve25519/ed25519/additions/usign_modified.c
deleted file mode 100644
index 3bbd871b7a..0000000000
--- a/libs/libaxolotl/src/curve25519/ed25519/additions/usign_modified.c
+++ /dev/null
@@ -1,62 +0,0 @@
-#include <string.h>
-#include "crypto_sign.h"
-#include "crypto_hash_sha512.h"
-#include "ge.h"
-#include "sc.h"
-#include "zeroize.h"
-#include "crypto_additions.h"
-
-/* NEW: Compare to pristine crypto_sign() 
-   Uses explicit private key for nonce derivation and as scalar,
-   instead of deriving both from a master key.
-*/
-int crypto_usign_modified(
-  unsigned char *sm,
-  const unsigned char *M,unsigned long Mlen,
-  const unsigned char *a, 
-  const unsigned char *A,
-  const unsigned char *random,
-  const ge_p3 *Bu,
-  const unsigned char *U
-)
-{
-  unsigned char r[64];
-  unsigned char h[64];
-  ge_p3 R, Ru;
-  int count=0;
-
-  /* r = SHA512(label(3) || a || U || random(64)) */
-  sm[0] = 0xFC;
-  for (count = 1; count < 32; count++)
-    sm[count] = 0xFF;
-
-  memmove(sm + 32, a, 32); /* Use privkey directly for nonce derivation */
-  memmove(sm + 64, U, 32);
-
-  memmove(sm + 96, random, 64); /* Add suffix of random data */
-  crypto_hash_sha512(r, sm, 160);
-
-  sc_reduce(r);
-  ge_scalarmult_base(&R, r);
-  ge_scalarmult(&Ru, r, Bu);
-
-  /* h = SHA512(label(4) || A || U || R || Ru || M) */
-  sm[0] = 0xFB;
-  memmove(sm + 32, A, 32);
-  memmove(sm + 64, U, 32);
-  ge_p3_tobytes(sm+96, &R);
-  ge_p3_tobytes(sm+128, &Ru);
-  memmove(sm + 160, M, Mlen);
-
-  crypto_hash_sha512(h, sm, Mlen + 160);
-  sc_reduce(h);
-
-  memmove(sm, h, 32);               /* Write h */
-  sc_muladd(sm + 32, h, a, r);      /* Write s */
-
-  /* Erase any traces of private scalar or
-     nonce left in the stack from sc_muladd. */
-  zeroize_stack();
-  zeroize(r, 64);
-  return 0;
-}