* Phillips, Justin - ACD wrote on Tue, Sep 11, 2007 at 14:20 -0400: > I am trying to call the HMAC function (openssl 0.9.8e) within my C++ > code. When I include <openssl/hmac.h> I get compilation errors on the > asn1.h file at lines 905, 915, 920, 933, 938, and 985 all saying > "invalid conversion from 'void (*)() to 'void*'. This makes sense > because the libraries are compiled with gcc but I am compiling my > software with g++ and in C++ this type of casting is not allowed. So my > question is how do you use openssl in C++ when the include files use C > specific syntax such as this? Thank you in advance for the help.
Hi, surely you also already had this idea, but just in case: we use wrappers often (in other projects, no openssl related) by having a C module with a C/C++ interoperable header calling the func one-to-one in its .c implementation. Maybe you'll use another MAC later or so, in this case this could even help :-) However, in most cases brutal unchecked `c style casts' help, because things like "(const void*)myFunc" are also possible in C++, just as in C; I'm not sure if "reinterpret_cast<const void*>(myFunc)" would work here. However, if .h does not even compile, this won't help at all, but of course instead you could include a fixed prototype which invites maintenance problems that can be excitingly expensive to detect and fix (if the prototypes change). If asn1.h is automatically generated by some asn1c or alike prototypes may be difficult to fix... oki, Steffen About Ingenico Throughout the world businesses rely on Ingenico for secure and expedient electronic transaction acceptance. Ingenico products leverage proven technology, established standards and unparalleled ergonomics to provide optimal reliability, versatility and usability. This comprehensive range of products is complemented by a global array of services and partnerships, enabling businesses in a number of vertical sectors to accept transactions anywhere their business takes them. www.ingenico.com This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. About Ingenico Throughout the world businesses rely on Ingenico for secure and expedient electronic transaction acceptance. Ingenico products leverage proven technology, established standards and unparalleled ergonomics to provide optimal reliability, versatility and usability. This comprehensive range of products is complemented by a global array of services and partnerships, enabling businesses in a number of vertical sectors to accept transactions anywhere their business takes them. www.ingenico.com This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
