1 files changed, 78 insertions, 0 deletions
diff --git a/libs/libtox/src/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/utils.c b/libs/libtox/src/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/utils.c
new file mode 100644
index 0000000000..e61ccf3ecf
--- /dev/null
+++ b/libs/libtox/src/toxencryptsave/crypto_pwhash_scryptsalsa208sha256/utils.c
@@ -0,0 +1,78 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#ifdef  VANILLA_NACL /* toxcore only uses this when libsodium is unavailable */
+
+#ifndef __STDC_WANT_LIB_EXT1__
+# define __STDC_WANT_LIB_EXT1__ 1
+#endif
+#include <assert.h>
+#include <errno.h>
+#include <limits.h>
+#include <signal.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef HAVE_SYS_MMAN_H
+# include <sys/mman.h>
+#endif
+
+#include "utils.h"
+
+#ifdef _WIN32
+# include <windows.h>
+# include <wincrypt.h>
+#else
+# include <unistd.h>
+#endif
+
+#ifdef HAVE_WEAK_SYMBOLS
+__attribute__((weak)) void
+__sodium_dummy_symbol_to_prevent_lto(void * const pnt, const size_t len)
+{
+    (void) pnt;
+    (void) len;
+}
+#endif
+
+void
+sodium_memzero(void * const pnt, const size_t len)
+{
+#ifdef _WIN32
+    SecureZeroMemory(pnt, len);
+#elif defined(HAVE_MEMSET_S)
+    if (memset_s(pnt, (rsize_t) len, 0, (rsize_t) len) != 0) {
+        abort();
+    }
+#elif defined(HAVE_EXPLICIT_BZERO)
+    explicit_bzero(pnt, len);
+#elif HAVE_WEAK_SYMBOLS
+    memset(pnt, 0, len);
+    __sodium_dummy_symbol_to_prevent_lto(pnt, len);
+#else
+    volatile unsigned char *pnt_ = (volatile unsigned char *) pnt;
+    size_t                     i = (size_t) 0U;
+
+    while (i < len) {
+        pnt_[i++] = 0U;
+    }
+#endif
+}
+
+int
+sodium_memcmp(const void * const b1_, const void * const b2_, size_t len)
+{
+    const unsigned char *b1 = (const unsigned char *) b1_;
+    const unsigned char *b2 = (const unsigned char *) b2_;
+    size_t               i;
+    unsigned char        d = (unsigned char) 0U;
+
+    for (i = 0U; i < len; i++) {
+        d |= b1[i] ^ b2[i];
+    }
+    return (int) ((1 & ((d - 1) >> 8)) - 1);
+}
+
+#endif