hmm, so you mean that these are function call statements? or is it a function
prototype? Yes, i was aware about the data type of the function prototype,
but since I never tried OpenSSL before, so i just try and see the error is.
Silly me :-)
I tried to put the statement in the main block, but then an error message
displayed "undefined reference to 'OpenSSL_add_all_algorithm" and "undefined
reference to 'SSL_load_error_strings'
Is there any linkage i forgot to put? Anyway, thanks for the reply.
Dave Thompson-4 wrote:
>
>> From: owner-openssl-...@openssl.org On Behalf Of omronz
>> Sent: Monday, 03 August, 2009 00:41
>
>> I am new in SSL. I start to play around OpenSSL by creating a
>> simple server that uses openssl. So, I just intialize the
>> openssl main library but my program returned the warning
>> message "data definition has no type or storage class" What
>> does this mean and how can i eliminate this warning message?
>> Hope that anyone here can help me since I am really new in OpenSSL.
>> My OpenSSL version is 0.9.8g 19 Oct 2007.
>>
> Apparently you are new to C programming also.
>
>> #include <openssl/bio.h>
>> //#include <openssl/ssl.h>
>> //#include <openssl/err.h>
>>
>> OpenSSL_add_all_algorithms(); //the warning message returned here
>> SSL_load_error_strings(); //the warning message returned here
>>
> You cannot have executable statements outside of a function
> body (more precisely, block) in C, so these are treated as
> VERY OLD pre-"K&R1" (circa 1975) declarations with
> no return type (implicit int) hence the warnings.
> These should be calls (statements) INSIDE main(),
> or in a larger program inside some function that is
> executed at or sufficiently near program start.
>
>> int main()
>> {
>> return 0;
>> }
>>
>> Another error i received is
>> - "previous declaration of
>> 'OPENSSL_add_all_algorithms_noconf' was here"
>> - "conflicting types for 'SSL_load_error_strings' "
>>
>> These error message above only appeared if i cancel the
>> comment tag at the #include <openssl/ssl.h> and #include
>> <openssl/err.h>
>>
> Those files provide the correct declarations (prototypes)
> which conflict with the incorrect ones you mistakenly wrote.
>
>> Hope that anyone can help me. I am now referring 3 basic
>> manuals about openssl and these 3 gives different
>> initialization library. Some uses
>> OpenSSL_add_all_algorithms(); and there are some uses
>> SSL_library_init(). I know that by using different library,
>> they offer different encryption and hash function example
>> like DES or any other encryption algo. Can both of them be
>> used using my openssl version? Thanks a lot.
>
> SSL_library_init adds to an internal table, which
> makes usable by name/id/EVP etc., the algorithms
> (potentially) needed by SSL/TLS. This is sufficient
> if your application uses OpenSSL to do SSL/TLS.
>
> OpenSSL_add_all_algorithms does this for all
> algorithms (that were included at build time).
> This can be needed if you want to do other crypto
> functions instead of or in addition to SSL/TLS.
>
>
>
> ______________________________________________________________________
> OpenSSL Project http://www.openssl.org
> Development Mailing List openssl-dev@openssl.org
> Automated List Manager majord...@openssl.org
>
>
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