1/* $RoughId: sha2init.c,v 1.3 2001/07/13 20:00:43 knu Exp $ */
2/* $Id: sha2init.c 26745 2010-02-24 00:31:37Z nobu $ */
3
4#include "digest.h"
5#if defined(SHA2_USE_OPENSSL)
6#include "sha2ossl.h"
7#else
8#include "sha2.h"
9#endif
10
11#define FOREACH_BITLEN(func)	func(256) func(384) func(512)
12
13#define DEFINE_ALGO_METADATA(bitlen) \
14static const rb_digest_metadata_t sha##bitlen = { \
15    RUBY_DIGEST_API_VERSION, \
16    SHA##bitlen##_DIGEST_LENGTH, \
17    SHA##bitlen##_BLOCK_LENGTH, \
18    sizeof(SHA##bitlen##_CTX), \
19    (rb_digest_hash_init_func_t)SHA##bitlen##_Init, \
20    (rb_digest_hash_update_func_t)SHA##bitlen##_Update, \
21    (rb_digest_hash_finish_func_t)SHA##bitlen##_Finish, \
22};
23
24FOREACH_BITLEN(DEFINE_ALGO_METADATA)
25
26/*
27 * Classes for calculating message digests using the SHA-256/384/512
28 * Secure Hash Algorithm(s) by NIST (the US' National Institute of
29 * Standards and Technology), described in FIPS PUB 180-2.
30 */
31void
32Init_sha2()
33{
34    VALUE mDigest, cDigest_Base;
35    ID id_metadata;
36
37#define DECLARE_ALGO_CLASS(bitlen) \
38    VALUE cDigest_SHA##bitlen;
39
40    FOREACH_BITLEN(DECLARE_ALGO_CLASS)
41
42    rb_require("digest");
43
44    id_metadata = rb_intern("metadata");
45
46    mDigest = rb_path2class("Digest");
47    cDigest_Base = rb_path2class("Digest::Base");
48
49#define DEFINE_ALGO_CLASS(bitlen) \
50    cDigest_SHA##bitlen = rb_define_class_under(mDigest, "SHA" #bitlen, cDigest_Base); \
51\
52    rb_ivar_set(cDigest_SHA##bitlen, id_metadata, \
53      Data_Wrap_Struct(rb_cObject, 0, 0, (void *)&sha##bitlen));
54
55    FOREACH_BITLEN(DEFINE_ALGO_CLASS)
56}
57