Brian Smith 7d3552e2a7 Remove PEM, PKCS#8, PKCS#12, X.509, and ASN.1.
Unfortunately these are all too tangled together to remove them
piece-by-piece without creating hard-to-review intermediate changes,
so this commit removes them all at once.
2015-08-26 21:05:44 -07:00
..
2015-05-27 21:49:39 +00:00
2014-12-04 22:12:55 +00:00
2014-06-20 13:17:32 -07:00
2014-12-04 22:13:50 +00:00
2014-06-20 13:17:32 -07:00
2015-05-27 21:49:39 +00:00
2014-12-04 22:12:26 +00:00

OID information is generated via a series of perl scripts. In order, the full
list of commands to run are:

        perl objects.pl objects.txt obj_mac.num ../../include/openssl/obj_mac.h
        perl obj_dat.pl ../../include/openssl/obj_mac.h obj_dat.h
        perl obj_xref.pl obj_mac.num obj_xref.txt > obj_xref.h

objects.txt contains the list of all built-in OIDs. It is processed by
objects.pl to output obj_mac.num and obj_mac.h. obj_mac.num is the list of NID
values for each OID. This is an input/output parameter so NID values are stable
across regenerations. obj_mac.h is the header which defines macros for all the
built-in OIDs in C.

obj_mac.h is read by obj_dat.pl to generate obj_dat.h. obj_dat.h contains the
ASN1_OBJECTs corresponding to built-in OIDs themselves along with lookup tables
for search by short name, OID, etc.

obj_mac.num and obj_xref.txt are read by obj_xref.pl to generate
obj_xref.h. obj_xref.txt links signature OIDs to corresponding public key
algorithms and digests. obj_xref.h contains lookup tables for querying this
information in both directions.

Dependency graph:

                        objects.txt
                            |
                            V
                       [objects.pl] <--+
                         /      \      |
                        V        V     |
                  obj_mac.h    obj_mac.num  obj_xref.txt
                      |              \      /
                      V               V    V
                 [obj_dat.pl]      [obj_xref.pl]
                      |                  |
                      V                  V
                  obj_dat.h         obj_xref.h