Ruby: ext/digest/sha2/sha2init.c Source File

00001 /* $RoughId: sha2init.c,v 1.3 2001/07/13 20:00:43 knu Exp $ */
00002 /* $Id: sha2init.c 52797 2015-11-30 12:08:16Z usa $ */
00003 
00004 #include <ruby/ruby.h>
00005 #include "../digest.h"
00006 #if defined(SHA2_USE_OPENSSL)
00007 #include "sha2ossl.h"
00008 #else
00009 #include "sha2.h"
00010 #endif
00011 
00012 #define FOREACH_BITLEN(func)    func(256) func(384) func(512)
00013 
00014 #define DEFINE_ALGO_METADATA(bitlen) \
00015 static const rb_digest_metadata_t sha##bitlen = { \
00016     RUBY_DIGEST_API_VERSION, \
00017     SHA##bitlen##_DIGEST_LENGTH, \
00018     SHA##bitlen##_BLOCK_LENGTH, \
00019     sizeof(SHA##bitlen##_CTX), \
00020     (rb_digest_hash_init_func_t)SHA##bitlen##_Init, \
00021     (rb_digest_hash_update_func_t)SHA##bitlen##_Update, \
00022     (rb_digest_hash_finish_func_t)SHA##bitlen##_Finish, \
00023 };
00024 
00025 FOREACH_BITLEN(DEFINE_ALGO_METADATA)
00026 
00027 /*
00028  * Classes for calculating message digests using the SHA-256/384/512
00029  * Secure Hash Algorithm(s) by NIST (the US' National Institute of
00030  * Standards and Technology), described in FIPS PUB 180-2.
00031  */
00032 void
00033 Init_sha2()
00034 {
00035     VALUE mDigest, cDigest_Base;
00036     ID id_metadata;
00037 
00038 #define DECLARE_ALGO_CLASS(bitlen) \
00039     VALUE cDigest_SHA##bitlen;
00040 
00041     FOREACH_BITLEN(DECLARE_ALGO_CLASS)
00042 
00043     rb_require("digest");
00044 
00045     id_metadata = rb_intern("metadata");
00046 
00047     mDigest = rb_path2class("Digest");
00048     cDigest_Base = rb_path2class("Digest::Base");
00049 
00050 #define DEFINE_ALGO_CLASS(bitlen) \
00051     cDigest_SHA##bitlen = rb_define_class_under(mDigest, "SHA" #bitlen, cDigest_Base); \
00052 \
00053     rb_ivar_set(cDigest_SHA##bitlen, id_metadata, \
00054       Data_Wrap_Struct(rb_cObject, 0, 0, (void *)&sha##bitlen));
00055 
00056     FOREACH_BITLEN(DEFINE_ALGO_CLASS)
00057 }
00058