From 6ceeb199181d64031f4173cfbffa066f5b9796b8 Mon Sep 17 00:00:00 2001 From: Kelly Rauchenberger Date: Sun, 10 Sep 2017 22:12:47 -0400 Subject: Added identifying hash to Pokémon data structure MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The purpose of this hash is described in detail in pokemon.h. The hash is computed using an implementation of SHA-224. To allow the GBA sufficient time to compute this hash, a delay of 5 milliseconds was introduced on the GC side before reading a Pokémon. --- gba/source/sha2.h | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 gba/source/sha2.h (limited to 'gba/source/sha2.h') diff --git a/gba/source/sha2.h b/gba/source/sha2.h new file mode 100644 index 0000000..efd3059 --- /dev/null +++ b/gba/source/sha2.h @@ -0,0 +1,74 @@ +/* + * FIPS 180-2 SHA-224/256/384/512 implementation + * Last update: 02/02/2007 + * Issue date: 04/30/2005 + * + * Copyright (C) 2005, 2007 Olivier Gay + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef SHA2_H +#define SHA2_H + +#define SHA224_DIGEST_SIZE ( 224 / 8) +#define SHA256_DIGEST_SIZE ( 256 / 8) + +#define SHA256_BLOCK_SIZE ( 512 / 8) +#define SHA224_BLOCK_SIZE SHA256_BLOCK_SIZE + +#ifndef SHA2_TYPES +#define SHA2_TYPES +typedef unsigned char uint8; +typedef unsigned int uint32; +typedef unsigned long long uint64; +#endif + +typedef struct { + unsigned int tot_len; + unsigned int len; + unsigned char block[2 * SHA256_BLOCK_SIZE]; + uint32 h[8]; +} sha256_ctx; + +typedef sha256_ctx sha224_ctx; + +void sha224_init(sha224_ctx *ctx); +void sha224_update(sha224_ctx *ctx, const unsigned char *message, + unsigned int len); +void sha224_final(sha224_ctx *ctx, unsigned char *digest); +void sha224(const unsigned char *message, unsigned int len, + unsigned char *digest); + +void sha256_init(sha256_ctx * ctx); +void sha256_update(sha256_ctx *ctx, const unsigned char *message, + unsigned int len); +void sha256_final(sha256_ctx *ctx, unsigned char *digest); +void sha256(const unsigned char *message, unsigned int len, + unsigned char *digest); + +#endif /* !SHA2_H */ + -- cgit 1.4.1