- hide the EC_KEY structure definition in ec_lcl.c + add
  some functions to use/access the EC_KEY fields
- change the way how method specific data (ecdsa/ecdh) is
  attached to a EC_KEY
- add ECDSA_sign_ex and ECDSA_do_sign_ex functions with
  additional parameters for pre-computed values
- rebuild libeay.num from 0.9.7

for ecdh)

("perl util/ck_errf.pl */*.c */*/*.c" still reports many more.)

  and BN_get_sign
- implement BN_set_negative as a function
- always use "#define BN_is_zero(a) ((a)->top == 0)"

dh.h, dsa.h, ec.h, ecdh.h, ecdsa.h, rsa.h), as the opaque bignum types are
already declared in ossl_typ.h. Add explicit includes for bn.h in those C
files that need access to structure internals or API functions+macros.

Submitted by: Nils Larsch
Reviewed by: Geoff Thorpe

Submitted by: Nils Larsch <nla@trustcenter.de>

PR: 459

Submitted by: Nils Larsch

Submitted by: Nils Larsch

This is not ECDSA specific, so it's now PEM_STRING_ECPRIVATEKEY etc.

Submitted by: Nils Larsch <nlarsch@compuserve.de>

Submitted by: Nils Larsch

Submitted by: Nils Larsch <nla@trustcenter.de>