Ruby 1.9.3p327(2012-11-10revision37606)
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00001 /* $RoughId: sha2init.c,v 1.3 2001/07/13 20:00:43 knu Exp $ */ 00002 /* $Id: sha2init.c 26745 2010-02-24 00:31:37Z nobu $ */ 00003 00004 #include "digest.h" 00005 #if defined(SHA2_USE_OPENSSL) 00006 #include "sha2ossl.h" 00007 #else 00008 #include "sha2.h" 00009 #endif 00010 00011 #define FOREACH_BITLEN(func) func(256) func(384) func(512) 00012 00013 #define DEFINE_ALGO_METADATA(bitlen) \ 00014 static const rb_digest_metadata_t sha##bitlen = { \ 00015 RUBY_DIGEST_API_VERSION, \ 00016 SHA##bitlen##_DIGEST_LENGTH, \ 00017 SHA##bitlen##_BLOCK_LENGTH, \ 00018 sizeof(SHA##bitlen##_CTX), \ 00019 (rb_digest_hash_init_func_t)SHA##bitlen##_Init, \ 00020 (rb_digest_hash_update_func_t)SHA##bitlen##_Update, \ 00021 (rb_digest_hash_finish_func_t)SHA##bitlen##_Finish, \ 00022 }; 00023 00024 FOREACH_BITLEN(DEFINE_ALGO_METADATA) 00025 00026 /* 00027 * Classes for calculating message digests using the SHA-256/384/512 00028 * Secure Hash Algorithm(s) by NIST (the US' National Institute of 00029 * Standards and Technology), described in FIPS PUB 180-2. 00030 */ 00031 void 00032 Init_sha2() 00033 { 00034 VALUE mDigest, cDigest_Base; 00035 ID id_metadata; 00036 00037 #define DECLARE_ALGO_CLASS(bitlen) \ 00038 VALUE cDigest_SHA##bitlen; 00039 00040 FOREACH_BITLEN(DECLARE_ALGO_CLASS) 00041 00042 rb_require("digest"); 00043 00044 id_metadata = rb_intern("metadata"); 00045 00046 mDigest = rb_path2class("Digest"); 00047 cDigest_Base = rb_path2class("Digest::Base"); 00048 00049 #define DEFINE_ALGO_CLASS(bitlen) \ 00050 cDigest_SHA##bitlen = rb_define_class_under(mDigest, "SHA" #bitlen, cDigest_Base); \ 00051 \ 00052 rb_ivar_set(cDigest_SHA##bitlen, id_metadata, \ 00053 Data_Wrap_Struct(rb_cObject, 0, 0, (void *)&sha##bitlen)); 00054 00055 FOREACH_BITLEN(DEFINE_ALGO_CLASS) 00056 } 00057