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DSで知的財産部から指摘されていたのでメガチップ提供部分のBlowfishコードを分離（DSと同等に）。
git-svn-id: file:///Users/lillianskinner/Downloads/platinum/twl/TwlIPL/trunk@1662 b08762b0-b915-fc4b-9d8c-17b2551a87ff
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nakasima
parent
dfef131d4f
commit
5d39671dc7
@ -15,6 +15,7 @@
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#include <twl/types.h>
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#include <firm/gcd/blowfish.h>
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#include <hotswTypes.h>
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#ifdef __cplusplus
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@ -26,18 +27,10 @@ extern BLOWFISH_CTX HotSwBlowfishInitTableBufDS;
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extern BLOWFISH_CTX HotSwBlowfishInitTableTWL;
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// Function Prototype ------------------------------------------------------------------------
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// Blowfish <20>‰Šú‰»
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void InitBlowfish(BLOWFISH_CTX *ctx, const unsigned char *key, int keyLen);
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// Blowfish KeyとTableの初期化
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void InitBlowfishKeyAndTableDS(BLOWFISH_CTX *ctx, u32 *keyBufp, s32 keyLen);
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// Blowfish •œ<E280A2>†‰»
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void EncryptByBlowfish(const BLOWFISH_CTX *ctx, u32 *xl, u32 *xr);
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// Blowfish ˆÃ<CB86>†‰»
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void DecryptByBlowfish(const BLOWFISH_CTX *ctx, u32 *xl, u32 *xr);
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// Key Table の生成
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void MakeBlowfishTableDS(CardBootData *cbd, s32 keyLen);
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148
build/libraries_sysmenu/hotsw/ARM7/src/Blowfish.c
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148
build/libraries_sysmenu/hotsw/ARM7/src/Blowfish.c
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/*--------------------------------------------------------------------
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!
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! Blowfish.c
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!
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! Copyright 2002 by MegaChips Corporation
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!
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!---------------------------------------------------------------------
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! PROJECT: IRIS Demo
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! CATEGORY: C source
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! COMMENT: Blowfish subroutine
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! $Author: kawamura.kumiko $
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! $Date: 2002/12/02 08:13:54 $
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! $Revision: 1.2 $
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!--
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*/
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#include "blowfish.h"
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#define MAXKEYBYTES 56 /* 448 bits */
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#define N 16
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static u32 F(const BLOWFISH_CTX *ctx, u32 x);
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void InitBlowfish(BLOWFISH_CTX *ctx, const unsigned char *key, int keyLen)
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{
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int i, j, k;
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u32 data, datal, datar;
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j = 0;
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for (i = 0; i < N + 2; ++i) {
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data = 0x00000000;
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for (k = 0; k < 4; ++k) {
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data = (data << 8) | key[j];
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j = j + 1;
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if (j >= keyLen)
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j = 0;
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}
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ctx->P[i] = ctx->P[i] ^ data;
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}
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datal = 0x00000000;
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datar = 0x00000000;
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for (i = 0; i < N + 2; i += 2) {
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EncryptByBlowfish(ctx, &datal, &datar);
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ctx->P[i] = datal;
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ctx->P[i + 1] = datar;
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}
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for (i = 0; i < 4; ++i) {
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for (j = 0; j < 256; j += 2) {
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EncryptByBlowfish(ctx, &datal, &datar);
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ctx->S[i][j] = datal;
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ctx->S[i][j + 1] = datar;
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}
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}
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}
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void EncryptByBlowfish(const BLOWFISH_CTX *ctx, u32 *xl, u32 *xr)
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{
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u32 Xl;
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u32 Xr;
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u32 temp;
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int i;
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Xl = *xl;
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Xr = *xr;
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for (i = 0; i < N; ++i) {
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Xl = Xl ^ ctx->P[i];
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Xr = F(ctx, Xl) ^ Xr;
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temp = Xl;
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Xl = Xr;
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Xr = temp;
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}
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temp = Xl;
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Xl = Xr;
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Xr = temp;
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Xr = Xr ^ ctx->P[N];
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Xl = Xl ^ ctx->P[N + 1];
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*xl = Xl;
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*xr = Xr;
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}
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void DecryptByBlowfish(const BLOWFISH_CTX *ctx, u32 *xl, u32 *xr)
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{
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u32 Xl;
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u32 Xr;
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u32 temp;
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int i;
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Xl = *xl;
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Xr = *xr;
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for (i = N + 1; i > 1; --i) {
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Xl = Xl ^ ctx->P[i];
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Xr = F(ctx, Xl) ^ Xr;
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temp = Xl;
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Xl = Xr;
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Xr = temp;
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}
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temp = Xl;
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Xl = Xr;
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Xr = temp;
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Xr = Xr ^ ctx->P[1];
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Xl = Xl ^ ctx->P[0];
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*xl = Xl;
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*xr = Xr;
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}
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static u32 F(const BLOWFISH_CTX *ctx, u32 x) {
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u32 a, b, c, d;
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u32 y;
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d = x & 0x00FF;
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x >>= 8;
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c = x & 0x00FF;
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x >>= 8;
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b = x & 0x00FF;
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x >>= 8;
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a = x & 0x00FF;
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y = ctx->S[0][a] + ctx->S[1][b];
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y = y ^ ctx->S[2][c];
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y = y + ctx->S[3][d];
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return y;
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}
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102
build/libraries_sysmenu/hotsw/ARM7/src/hotswBlowfish.c
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102
build/libraries_sysmenu/hotsw/ARM7/src/hotswBlowfish.c
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/*---------------------------------------------------------------------------*
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Project: TwlIPL
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File: blowfish.c
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Copyright 2007 Nintendo. All rights reserved.
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These coded instructions, statements, and computer programs contain
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proprietary information of Nintendo of America Inc. and/or Nintendo
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Company Ltd., and are protected by Federal copyright law. They may
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not be disclosed to third parties or copied or duplicated in any form,
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in whole or in part, without the prior written consent of Nintendo.
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*---------------------------------------------------------------------------*/
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#include <twl.h>
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#include <blowfish.h>
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#include <firm/format/from_firm.h>
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#include <firm/hw/ARM7/mmap_firm.h>
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// Function Prototype -------------------------------------------------------
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/*---------------------------------------------------------------------------*
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Name: MakeBlowfishTableDS
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Description: KeyTableの生成
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*---------------------------------------------------------------------------*/
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void MakeBlowfishTableDS(CardBootData *cbd, s32 keyLen)
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{
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const BLOWFISH_CTX *initTable = &HotSwBlowfishInitTableBufDS;
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u32 *RomHeaderGameCode = (u32 *)cbd->pBootSegBuf->rh.s.game_code;
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u32 *keyBuf = cbd->keyBuf;
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BLOWFISH_CTX *ctx = &cbd->keyTable;
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MI_CpuCopyFast((void *)initTable, (void *)ctx, sizeof(BLOWFISH_CTX));
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keyBuf[0] = *RomHeaderGameCode;
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keyBuf[1] = *RomHeaderGameCode >> 1;
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keyBuf[2] = *RomHeaderGameCode << 1;
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InitBlowfishKeyAndTableDS(ctx, keyBuf, keyLen);
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InitBlowfishKeyAndTableDS(ctx, keyBuf, keyLen);
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}
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/*---------------------------------------------------------------------------*
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Name: MakeBlowfishTableTWL
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Description: KeyTable2の生成
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*---------------------------------------------------------------------------*/
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void MakeBlowfishTableTWL(CardBootData *cbd, s32 keyLen, u16 bondingOp)
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{
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u32 *RomHeaderGameCode = (u32 *)cbd->pBootSegBuf->rh.s.game_code;
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u32 *keyBuf = cbd->keyBuf2;
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BLOWFISH_CTX *ctx = &cbd->keyTable2;
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void *tempCTX;
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// 製品機の場合
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if(bondingOp == SCFG_OP_PRODUCT){
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MI_CpuCopyFast((void *)((OSFromFirm7Buf *)HW_FIRM_FROM_FIRM_BUF)->twl_blowfish, (void *)ctx, sizeof(BLOWFISH_CTX));
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}
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// 開発機の場合
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else{
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MI_CpuCopyFast(&HotSwBlowfishInitTableTWL, (void *)ctx, sizeof(BLOWFISH_CTX));
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// スタック領域がオーバーフローするから、ヒープ領域から領域を確保する。
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tempCTX = OS_AllocFromSubPrivWram( sizeof(BLOWFISH_CTX) );
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if(tempCTX != NULL){
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ctx = tempCTX;
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}
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else{
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return;
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}
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}
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keyBuf[0] = *RomHeaderGameCode;
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keyBuf[1] = *RomHeaderGameCode >> 1;
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keyBuf[2] = *RomHeaderGameCode << 1;
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InitBlowfishKeyAndTableDS(ctx, keyBuf, keyLen);
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// Heapの開放
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if(bondingOp != SCFG_OP_PRODUCT){
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OS_FreeToSubPrivWram( tempCTX );
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}
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}
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/*---------------------------------------------------------------------------*
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Name: InitBlowfishKeyAndTableDS
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Description:
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*---------------------------------------------------------------------------*/
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void InitBlowfishKeyAndTableDS(BLOWFISH_CTX *ctx, u32 *keyBufp, s32 keyLen)
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{
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EncryptByBlowfish(ctx, (void*)&(keyBufp)[2], (void*)&(keyBufp)[1]);
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EncryptByBlowfish(ctx, (void*)&(keyBufp)[1], (void*)&(keyBufp)[0]);
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InitBlowfish(ctx, (u8 *)keyBufp, keyLen);
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}
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