PK11_DecryptWithSymKey and PK11_EncryptWithSymKey have been

mozilla/security/nss/lib/freebl/ecl/ecp_256_32.c

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /* A 32-bit implementation of the NIST P-256 elliptic curve. */
 
 #include <string.h>
 
 #include "prtypes.h"
 #include "mpi.h"
@@ skipping 1246 matching lines @@
 #define BYTESWAP32(x) \
     ((x) >> 24 | (x) >> 8 & 0xff00 | ((x) & 0xff00) << 8 | (x) << 24)
 #define BYTESWAP64(x) \
     ((x) >> 56 | (x) >> 40 & 0xff00 | \
      (x) >> 24 & 0xff0000 | (x) >> 8 & 0xff000000 | \
      ((x) & 0xff000000) << 8 | ((x) & 0xff0000) << 24 | \
      ((x) & 0xff00) << 40 | (x) << 56)
 #endif
 
 #ifdef MP_USE_UINT_DIGIT
-#define BYTESWAP_MP_DIGIT_TO_LE(x) BYTESWAP32(BYTESWAP32(x))
+#define BYTESWAP_MP_DIGIT_TO_LE(x) BYTESWAP32(x)
 #else
-#define BYTESWAP_MP_DIGIT_TO_LE(x) BYTESWAP64(BYTESWAP64(x))
+#define BYTESWAP_MP_DIGIT_TO_LE(x) BYTESWAP64(x)
 #endif
 #endif /* IS_BIG_ENDIAN */
 
 #ifdef MP_USE_UINT_DIGIT
 static const mp_digit kRInvDigits[8] = {
     0x80000000, 1, 0xffffffff, 0,
     0x80000001, 0xfffffffe, 1, 0x7fffffff
 };
 #else
 static const mp_digit kRInvDigits[4] = {
@@ skipping 217 matching lines @@
 /* Wire in fast point multiplication for named curves. */
 mp_err ec_group_set_gfp256_32(ECGroup *group, ECCurveName name)
 {
     if (name == ECCurve_NIST_P256) {
         group->base_point_mul = &ec_GFp_nistp256_base_point_mul;
         group->point_mul = &ec_GFp_nistp256_point_mul;
         group->points_mul = &ec_GFp_nistp256_points_mul_vartime;
     }
     return MP_OKAY;
 }