2018-01-10 02:08:29 +01:00
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#pragma once
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/*
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* This file is part of fastboot 3DS
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* Copyright (C) 2017 derrek, profi200
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "common.h"
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//////////////////////////////////
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// RSA //
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//////////////////////////////////
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// REG_RSA_CNT
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#define RSA_ENABLE (1u)
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#define RSA_UNK_BIT1 (1u<<1)
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#define RSA_KEYSLOT(k) ((k)<<4)
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#define RSA_GET_KEYSLOT ((REG_RSA_CNT & RSA_KEYSLOT(0xFu))>>4)
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#define RSA_INPUT_BIG (1u<<8)
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#define RSA_INPUT_LITTLE (0u)
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#define RSA_INPUT_NORMAL (1u<<9)
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#define RSA_INPUT_REVERSED (0u)
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// RSA_SLOTCNT
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#define RSA_KEY_STAT_SET (1u)
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#define RSA_KEY_WR_PROT (1u<<1)
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#define RSA_KEY_UNK_BIT31 (1u<<31)
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// RSA_SLOTSIZE
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#define RSA_SLOTSIZE_2048 (0x40u)
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/**
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* @brief Initializes the RSA hardware.
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*/
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void RSA_init(void);
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/**
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* @brief Selects the given keyslot for all following RSA operations.
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*
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* @param[in] keyslot The keyslot to select.
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*/
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void RSA_selectKeyslot(u8 keyslot);
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/**
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* @brief Sets a RSA modulus + exponent in the specified keyslot.
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*
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* @param[in] keyslot The keyslot this key will be set for.
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* @param[in] mod Pointer to 2048-bit RSA modulus data.
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* @param[in] exp The exponent to set.
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*
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* @return Returns true on success, false otherwise.
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*/
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2019-04-17 00:08:43 +02:00
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bool RSA_setKey2048(u8 keyslot, const u32 *const mod, u32 exp);
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2018-01-10 02:08:29 +01:00
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/**
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* @brief Decrypts a RSA 2048 signature.
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*
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* @param decSig Pointer to decrypted destination signature.
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* @param[in] encSig Pointer to encrypted source signature.
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*
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* @return Returns true on success, false otherwise.
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*/
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2019-04-17 00:08:43 +02:00
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bool RSA_decrypt2048(u32 *const decSig, const u32 *const encSig);
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2018-01-10 02:08:29 +01:00
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/**
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* @brief Verifies a RSA 2048 SHA 256 signature.
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* @brief Note: This function skips the ASN.1 data and is therefore not safe.
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*
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* @param[in] encSig Pointer to encrypted source signature.
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* @param[in] data Pointer to the data to hash.
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* @param[in] size The hash data size.
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*
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* @return Returns true if the signature is valid, false otherwise.
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*/
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bool RSA_verify2048(const u32 *const encSig, const u32 *const data, u32 size);
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