Re: generating sha256 hashes with openssl?
- From: Dave <davidct1209@xxxxxxxxx>
- To: programmingblind@xxxxxxxxxxxxx
- Date: Sun, 22 Aug 2010 17:24:23 -0700
Btw, it might help to let us know what's failing (runtime error,
unexpected values?).
On 8/22/10, Dave <davidct1209@xxxxxxxxx> wrote:
> Easy way to find out; does std::string have an overloaded equals
> operator and does it perform a copy? You can also try just
> constructing a new std::string for the hash and see if that solves the
> problem.
>
> On 8/22/10, Littlefield, Tyler <tyler@xxxxxxxxxxxxx> wrote:
>> std::string should strcpy though, no?
>> ----- Original Message -----
>> From: "Dave" <davidct1209@xxxxxxxxx>
>> To: <programmingblind@xxxxxxxxxxxxx>
>> Sent: Sunday, August 22, 2010 5:42 PM
>> Subject: Re: generating sha256 hashes with openssl?
>>
>>
>>> From a cursory glance at the function (and without knowing what
>>> exactly failed), it potentially looks like you have a dangling
>>> pointer.
>>>
>>> You assign to your password class member an array of characters which
>>> you created on the heap (and then delete).
>>>
>>> On 8/22/10, Littlefield, Tyler <tyler@xxxxxxxxxxxxx> wrote:
>>>> Hello all,
>>>> I've been trying to figure this out based on documentation from openssl
>>>> (what little there is) and some info from google, but it still seems to
>>>> be
>>>> failing: Any ideas would be great on where I might be going wrong; here
>>>> is
>>>> the function
>>>> void Player::SetPassword(const std::string &s)
>>>> {
>>>> SHA256_CTX context;
>>>> unsigned char *hash = new unsigned char[SHA256_DIGEST_LENGTH+1];
>>>> memset(hash, 0, SHA256_DIGEST_LENGTH+1);
>>>>
>>>> SHA256_Init(&context);
>>>> SHA256_Update(&context, (unsigned char*)s.c_str(), s.length());
>>>> SHA256_Final(hash, &context);
>>>> _password=(char*)hash;
>>>> delete []hash;
>>>> }
>>>> Thanks,
>>>> Ty
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