diff options
Diffstat (limited to 'crypto/openssl/crypto/bn/bn_lib.c')
| -rw-r--r-- | crypto/openssl/crypto/bn/bn_lib.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/crypto/openssl/crypto/bn/bn_lib.c b/crypto/openssl/crypto/bn/bn_lib.c index 86d4956c8a8c..eb4a31849bef 100644 --- a/crypto/openssl/crypto/bn/bn_lib.c +++ b/crypto/openssl/crypto/bn/bn_lib.c @@ -1,5 +1,5 @@ /* - * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved. + * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy @@ -87,6 +87,15 @@ const BIGNUM *BN_value_one(void) return &const_one; } +/* + * Old Visual Studio ARM compiler miscompiles BN_num_bits_word() + * https://mta.openssl.org/pipermail/openssl-users/2018-August/008465.html + */ +#if defined(_MSC_VER) && defined(_ARM_) && defined(_WIN32_WCE) \ + && _MSC_VER>=1400 && _MSC_VER<1501 +# define MS_BROKEN_BN_num_bits_word +# pragma optimize("", off) +#endif int BN_num_bits_word(BN_ULONG l) { BN_ULONG x, mask; @@ -131,6 +140,9 @@ int BN_num_bits_word(BN_ULONG l) return bits; } +#ifdef MS_BROKEN_BN_num_bits_word +# pragma optimize("", on) +#endif /* * This function still leaks `a->dmax`: it's caller's responsibility to @@ -322,15 +334,19 @@ BIGNUM *BN_dup(const BIGNUM *a) BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b) { + int bn_words; + bn_check_top(b); + bn_words = BN_get_flags(b, BN_FLG_CONSTTIME) ? b->dmax : b->top; + if (a == b) return a; - if (bn_wexpand(a, b->top) == NULL) + if (bn_wexpand(a, bn_words) == NULL) return NULL; if (b->top > 0) - memcpy(a->d, b->d, sizeof(b->d[0]) * b->top); + memcpy(a->d, b->d, sizeof(b->d[0]) * bn_words); a->neg = b->neg; a->top = b->top; |