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bn/bn_intern.c: const-ify bn_set_{static}_words.

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Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6738)
This commit is contained in:
Andy Polyakov 2018-07-18 15:13:27 +02:00
parent 708c28f2f0
commit f40e0a342c
2 changed files with 9 additions and 5 deletions
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10
crypto/bn/bn_intern.c
View file

@ -172,16 +172,20 @@ BN_ULONG *bn_get_words(const BIGNUM *a)
return a->d;
}
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)
{
a->d = words;
/*
* |const| qualifier omission is compensated by BN_FLG_STATIC_DATA
* flag, which effectively means "read-only data".
*/
a->d = (BN_ULONG *)words;
a->dmax = a->top = size;
a->neg = 0;
a->flags |= BN_FLG_STATIC_DATA;
bn_correct_top(a);
}
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)
{
if (bn_wexpand(a, num_words) == NULL) {
BNerr(BN_F_BN_SET_WORDS, ERR_R_MALLOC_FAILURE);

4
crypto/include/internal/bn_int.h
View file

@ -47,7 +47,7 @@ BN_ULONG *bn_get_words(const BIGNUM *a);
* 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.
@ -58,7 +58,7 @@ void bn_set_static_words(BIGNUM *a, BN_ULONG *words, int size);
* |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);
/*
* Some BIGNUM functions assume most significant limb to be non-zero, which