Re: Problem to compile static void *KDF1_SHA1

[shakal]

yeah, I've tried before and It hasn't worked. And now, I did it again
using g++ command instead gcc and it worked.
Thank you!
Shakal
> [EMAIL PROTECTED] wrote:
>> Hi all,
>>
>> I've created a method to generate ECDH Key, based on ecdhtest.c,
>> available
>> at /openssl/test directory.
>> But I'm facing some trouble to compile it.
>> I've inserted the following code in the begining of the file, acording
>> ecdhtest.c,
>>> static const int KDF1_SHA1_len = 20;
>>> static void *KDF1_SHA1(const void *in, size_t inlen, void *out, size_t
>> *outlen)
>>> {
>>> #ifndef OPENSSL_NO_SHA
>>> if (*outlen < SHA_DIGEST_LENGTH)
>>>  return NULL;
>>> else
>>>  *outlen = SHA_DIGEST_LENGTH;
>>> return SHA1(in, inlen, out);
>>> #else
>>> return NULL;
>>> #endif
>>> }
>> in order to use the ECDH method:
>>> out=ECDH_compute_key(buf,len,EC_KEY_get0_public_key(public_key),ec_key,KDF1_SHA1);
>> When I compile it, the following messages appear.
>>> aodv/aodv.cc: In function ‘void* KDF1_SHA1(const void*, size_t,
>>> void*,
>> size_t*)’:
>>> aodv/aodv.cc:52: error: invalid conversion from ‘const void*’ to
>>> ‘const
>> unsigned char*’
>>> aodv/aodv.cc:52: error:   initializing argument 1 of ‘unsigned char*
>> SHA1(const unsigned char*, size_t, unsigned char*)’
>>> aodv/aodv.cc:52: error: invalid conversion from ‘void*’ to
>>> ‘unsigned char*’
>>> aodv/aodv.cc:52: error:   initializing argument 3 of ‘unsigned char*
>> SHA1(const unsigned char*, size_t, unsigned char*)
>>
>> I've already looked for the SHA1 constructor, and I don't know what is
>> going wrong.
>>
>> Has anybody already faced this problem?
>> if not, could you give me some tips in order to solve this problem?
>
> it looks like your compiler doesn't like the implicit conversion
> from "const void *" to "const unsigned char *" ... Did you try to
> use a cast ?
>
> Cheers,
> Nils
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