/*
- * Copyright 2014-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2014-2018 The OpenSSL Project Authors. All Rights Reserved.
*
- * Licensed under the OpenSSL license (the "License"). You may not use
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
# include <openssl/bn.h>
# include <limits.h>
-#ifdef __cplusplus
-extern "C" {
-#endif
-
BIGNUM *bn_wexpand(BIGNUM *a, int words);
BIGNUM *bn_expand2(BIGNUM *a, int words);
* Set the internal data words in a to point to words which contains size
* elements. The BN_FLG_STATIC_DATA flag is set
*/
-void bn_set_static_words(BIGNUM *a, BN_ULONG *words, int size);
+void bn_set_static_words(BIGNUM *a, const BN_ULONG *words, int size);
/*
* Copy words into the BIGNUM |a|, reallocating space as necessary.
* |num_words| is int because bn_expand2 takes an int. This is an internal
* function so we simply trust callers not to pass negative values.
*/
-int bn_set_words(BIGNUM *a, BN_ULONG *words, int num_words);
+int bn_set_words(BIGNUM *a, const BN_ULONG *words, int num_words);
-#ifdef __cplusplus
-}
-#endif
+/*
+ * Some BIGNUM functions assume most significant limb to be non-zero, which
+ * is customarily arranged by bn_correct_top. Output from below functions
+ * is not processed with bn_correct_top, and for this reason it may not be
+ * returned out of public API. It may only be passed internally into other
+ * functions known to support non-minimal or zero-padded BIGNUMs. Even
+ * though the goal is to facilitate constant-time-ness, not each subroutine
+ * is constant-time by itself. They all have pre-conditions, consult source
+ * code...
+ */
+int bn_mul_mont_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
+ BN_MONT_CTX *mont, BN_CTX *ctx);
+int bn_to_mont_fixed_top(BIGNUM *r, const BIGNUM *a, BN_MONT_CTX *mont,
+ BN_CTX *ctx);
+int bn_from_mont_fixed_top(BIGNUM *r, const BIGNUM *a, BN_MONT_CTX *mont,
+ BN_CTX *ctx);
+int bn_mod_add_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
+ const BIGNUM *m);
+int bn_mod_sub_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b,
+ const BIGNUM *m);
+int bn_mul_fixed_top(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx);
+int bn_sqr_fixed_top(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx);
+int bn_lshift_fixed_top(BIGNUM *r, const BIGNUM *a, int n);
+int bn_rshift_fixed_top(BIGNUM *r, const BIGNUM *a, int n);
+int bn_div_fixed_top(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m,
+ const BIGNUM *d, BN_CTX *ctx);
#endif