boringssl

History

David Benjamin efd8eb3226 Tidy up overflows in obj_cmp. While this isn't really an issue, don't use the a - b comparator pattern since it doesn't account for overflows. (They'll also break silently if that field ever becomes unsigned as it should be.) Change-Id: I613d19df6e4a785efd4cffd46e8b03dbc95b98e2 Reviewed-on: https://boringssl-review.googlesource.com/4890 Reviewed-by: Adam Langley <agl@google.com>		2015-05-28 17:22:19 +00:00
..
CMakeLists.txt	Precompute sorted array for error strings.	2015-02-09 17:35:31 -08:00
obj_dat.h	Remove fake RLE compression OID.	2015-05-27 21:49:39 +00:00
obj_dat.pl	Add documentation for the OID scripts.	2014-12-04 22:12:26 +00:00
obj_mac.num	Restore obj_mac.num from upstream.	2014-12-04 22:12:55 +00:00
obj_xref.c
obj_xref.h	Renegerate OID outputs.	2014-12-04 22:13:50 +00:00
obj_xref.pl	Add documentation for the OID scripts.	2014-12-04 22:12:26 +00:00
obj_xref.txt
obj.c	Tidy up overflows in obj_cmp.	2015-05-28 17:22:19 +00:00
objects.pl	Keep the obj_mac.h license header round-tripping.	2014-12-04 22:13:17 +00:00
objects.txt	Remove fake RLE compression OID.	2015-05-27 21:49:39 +00:00
README	Add documentation for the OID scripts.	2014-12-04 22:12:26 +00:00

README

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