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OSSL_FN: Wrap the BIGNUM 'sqr' function around the OSSL_FN 'sqr' function

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Reviewed-by: Matt Caswell <matt@openssl.foundation>
Reviewed-by: Tomas Mraz <tomas@openssl.foundation>
MergeDate: Fri Apr  3 12:32:22 2026
(Merged from https://github.com/openssl/openssl/pull/29819)
This commit is contained in:
Richard Levitte 2026-01-28 14:49:34 +01:00 • committed by Tomas Mraz
parent 929db7822d
commit f52bf9d167
1 changed files with 25 additions and 2 deletions
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27
crypto/bn/bn_sqr.c
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@ -16,11 +16,34 @@
*/
int BN_sqr(BIGNUM *r, const BIGNUM *a, BN_CTX *ctx)
{
int ret = bn_sqr_fixed_top(r, a, ctx);
/* TODO(FIXNUM): TO BE REMOVED */
if (r->data == NULL || a->data == NULL) {
int ret = bn_sqr_fixed_top(r, a, ctx);
bn_correct_top(r);
bn_correct_top(r);
bn_check_top(r);
return ret;
}
bn_check_top(a);
bn_check_top(r);
size_t top = a->top * 2;
size_t max = a->dmax * 2;
/*
* Unfortunately, OSSL_FN_CTX and BN_CTX are too wildly different to
* be interchangeable. We must therefore create an OSSL_FN_CTX here.
* (OSSL_FN_CTX is only really useful within OSSL_FN functionality)
*/
OSSL_FN_CTX *fnctx = OSSL_FN_CTX_new(NULL, 1, 2, max * 4);
OSSL_FN *rf = bn_acquire_ossl_fn(r, (int)top);
int ret = OSSL_FN_sqr(rf, a->data, fnctx);
bn_release(r, (int)top);
r->neg = 0;
OSSL_FN_CTX_free(fnctx);
return ret;
}