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Remove a pointless "#if 0" block from BN_mul.
Reviewed-by: Andy Polyakov <appro@openssl.org> (Merged from https://github.com/openssl/openssl/pull/3683)
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@ -587,46 +587,6 @@ int BN_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
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rr->top = top;
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goto end;
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}
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# if 0
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if (i == 1 && !BN_get_flags(b, BN_FLG_STATIC_DATA)) {
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BIGNUM *tmp_bn = (BIGNUM *)b;
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if (bn_wexpand(tmp_bn, al) == NULL)
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goto err;
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tmp_bn->d[bl] = 0;
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bl++;
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i--;
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} else if (i == -1 && !BN_get_flags(a, BN_FLG_STATIC_DATA)) {
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BIGNUM *tmp_bn = (BIGNUM *)a;
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if (bn_wexpand(tmp_bn, bl) == NULL)
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goto err;
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tmp_bn->d[al] = 0;
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al++;
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i++;
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}
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if (i == 0) {
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/* symmetric and > 4 */
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/* 16 or larger */
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j = BN_num_bits_word((BN_ULONG)al);
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j = 1 << (j - 1);
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k = j + j;
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t = BN_CTX_get(ctx);
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if (al == j) { /* exact multiple */
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if (bn_wexpand(t, k * 2) == NULL)
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goto err;
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if (bn_wexpand(rr, k * 2) == NULL)
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goto err;
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bn_mul_recursive(rr->d, a->d, b->d, al, t->d);
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} else {
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if (bn_wexpand(t, k * 4) == NULL)
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goto err;
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if (bn_wexpand(rr, k * 4) == NULL)
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goto err;
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bn_mul_part_recursive(rr->d, a->d, b->d, al - j, j, t->d);
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}
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rr->top = top;
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goto end;
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}
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# endif
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}
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#endif /* BN_RECURSION */
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if (bn_wexpand(rr, top) == NULL)
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