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Clear BN_FLG_CONSTTIME on BN_CTX_get()

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Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8253)
This commit is contained in:
Nicola Tuveri 2019-02-08 12:42:25 +02:00
parent fe16ae5f95
commit c8147d37cc
1 changed files with 3 additions and 1 deletions
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4
crypto/bn/bn_ctx.c
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@ -1,5 +1,5 @@
/*
* Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
* Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.
*
* 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
@ -227,6 +227,8 @@ BIGNUM *BN_CTX_get(BN_CTX *ctx)
}
/* OK, make sure the returned bignum is "zero" */
BN_zero(ret);
/* clear BN_FLG_CONSTTIME if leaked from previous frames */
ret->flags &= (~BN_FLG_CONSTTIME);
ctx->used++;
CTXDBG_RET(ctx, ret);
return ret;