sha2init.c
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/* $RoughId: sha2init.c,v 1.3 2001/07/13 20:00:43 knu Exp $ */
/* $Id: sha2init.c 26745 2010-02-24 00:31:37Z nobu $ */
#include "digest.h"
#if defined(SHA2_USE_OPENSSL)
#include "sha2ossl.h"
#else
#include "sha2.h"
#endif
#define FOREACH_BITLEN(func) func(256) func(384) func(512)
#define DEFINE_ALGO_METADATA(bitlen) \
static const rb_digest_metadata_t sha##bitlen = { \
RUBY_DIGEST_API_VERSION, \
SHA##bitlen##_DIGEST_LENGTH, \
SHA##bitlen##_BLOCK_LENGTH, \
sizeof(SHA##bitlen##_CTX), \
(rb_digest_hash_init_func_t)SHA##bitlen##_Init, \
(rb_digest_hash_update_func_t)SHA##bitlen##_Update, \
(rb_digest_hash_finish_func_t)SHA##bitlen##_Finish, \
};
FOREACH_BITLEN(DEFINE_ALGO_METADATA)
/*
* Classes for calculating message digests using the SHA-256/384/512
* Secure Hash Algorithm(s) by NIST (the US' National Institute of
* Standards and Technology), described in FIPS PUB 180-2.
*/
void
Init_sha2()
{
VALUE mDigest, cDigest_Base;
ID id_metadata;
#define DECLARE_ALGO_CLASS(bitlen) \
VALUE cDigest_SHA##bitlen;
FOREACH_BITLEN(DECLARE_ALGO_CLASS)
rb_require("digest");
id_metadata = rb_intern("metadata");
mDigest = rb_path2class("Digest");
cDigest_Base = rb_path2class("Digest::Base");
#define DEFINE_ALGO_CLASS(bitlen) \
cDigest_SHA##bitlen = rb_define_class_under(mDigest, "SHA" #bitlen, cDigest_Base); \
\
rb_ivar_set(cDigest_SHA##bitlen, id_metadata, \
Data_Wrap_Struct(rb_cObject, 0, 0, (void *)&sha##bitlen));
FOREACH_BITLEN(DEFINE_ALGO_CLASS)
}