libhx509 is not built according to the same export and calling conventions
on Windows as the other libraries. This change declares and applies
HX509_LIB_FUNCTION, HX509_LIB_NORETURN_FUNCTION, HX509_LIB_CALL and
HX509_LIB_VARIABLE to lib/hx509.
As a result of this change the calling convention for exported functions
will be __stdcall instead of __cdecl.
Change-Id: Ibc3f05e8088030ef7d13798f1d9c9b190bc57797
This adds a new backend for libhcrypto: the OpenSSL backend.
Now libhcrypto has these backends:
- hcrypto itself (i.e., the algorithms coded in lib/hcrypto)
- Common Crypto (OS X)
- PKCS#11 (specifically for Solaris, but not Solaris-specific)
- Windows CNG (Windows)
- OpenSSL (generic)
The ./configure --with-openssl=... option no longer disables the use of
hcrypto. Instead it enables the use of OpenSSL as a (and the default)
backend in libhcrypto. The libhcrypto framework is now always used.
OpenSSL should no longer be used directly within Heimdal, except in the
OpenSSL hcrypto backend itself, and files where elliptic curve (EC)
crypto is needed.
Because libhcrypto's EC support is incomplete, we can only use OpenSSL
for EC. Currently that means separating all EC-using code so that it
does not use hcrypto, thus the libhx509/hxtool and PKINIT EC code has
been moved out of the files it used to be in.
