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Add static check in BN_hex2bn

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Fixes #17298

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/17299)
This commit is contained in:
Kan 2021-12-17 00:35:32 +08:00 committed by Pauli
parent a595e3286a
commit 7c78bd4be8
1 changed files with 4 additions and 0 deletions
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4
crypto/bn/bn_conv.c
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@ -154,6 +154,10 @@ int BN_hex2bn(BIGNUM **bn, const char *a)
return 0;
} else {
ret = *bn;
if (BN_get_flags(ret, BN_FLG_STATIC_DATA)) {
ERR_raise(ERR_LIB_BN, ERR_R_PASSED_INVALID_ARGUMENT);
return 0;
}
BN_zero(ret);
}