mirror of
https://github.com/DarkMatterCore/nxdumptool.git
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120 lines
4.2 KiB
C
120 lines
4.2 KiB
C
/*
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* signature.h
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*
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* Copyright (c) 2020-2023, DarkMatterCore <pabloacurielz@gmail.com>.
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*
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* This file is part of nxdumptool (https://github.com/DarkMatterCore/nxdumptool).
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*
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* nxdumptool 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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* nxdumptool 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 <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#ifndef __SIGNATURE_H__
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#define __SIGNATURE_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef enum {
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SignatureType_Rsa4096Sha1 = 0x10000,
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SignatureType_Rsa2048Sha1 = 0x10001,
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SignatureType_Ecc480Sha1 = 0x10002,
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SignatureType_Rsa4096Sha256 = 0x10003,
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SignatureType_Rsa2048Sha256 = 0x10004,
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SignatureType_Ecc480Sha256 = 0x10005,
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SignatureType_Hmac160Sha1 = 0x10006
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} SignatureType;
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typedef struct {
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u32 sig_type; ///< SignatureType_Rsa4096Sha1, SignatureType_Rsa4096Sha256.
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u8 signature[0x200];
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u8 padding[0x3C];
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} SignatureBlockRsa4096;
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NXDT_ASSERT(SignatureBlockRsa4096, 0x240);
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typedef struct {
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u32 sig_type; ///< SignatureType_Rsa2048Sha1, SignatureType_Rsa2048Sha256.
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u8 signature[0x100];
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u8 padding[0x3C];
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} SignatureBlockRsa2048;
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NXDT_ASSERT(SignatureBlockRsa2048, 0x140);
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typedef struct {
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u32 sig_type; ///< SignatureType_Ecc480Sha1, SignatureType_Ecc480Sha256.
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u8 signature[0x3C];
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u8 padding[0x40];
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} SignatureBlockEcc480;
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NXDT_ASSERT(SignatureBlockEcc480, 0x80);
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typedef struct {
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u32 sig_type; ///< SignatureType_Hmac160Sha1.
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u8 signature[0x14];
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u8 padding[0x28];
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} SignatureBlockHmac160;
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NXDT_ASSERT(SignatureBlockHmac160, 0x40);
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/// Helper inline functions.
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NX_INLINE u32 signatureGetSigType(void *buf, bool byteswap)
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{
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if (!buf) return 0;
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return (byteswap ? __builtin_bswap32(*((u32*)buf)) : *((u32*)buf));
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}
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NX_INLINE bool signatureIsValidSigType(u32 type)
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{
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return (type == SignatureType_Rsa4096Sha1 || type == SignatureType_Rsa2048Sha1 || type == SignatureType_Ecc480Sha1 || \
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type == SignatureType_Rsa4096Sha256 || type == SignatureType_Rsa2048Sha256 || type == SignatureType_Ecc480Sha256 || \
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type == SignatureType_Hmac160Sha1);
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}
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NX_INLINE u8 *signatureGetSig(void *buf)
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{
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return (buf ? ((u8*)buf + 4) : NULL);
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}
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NX_INLINE u64 signatureGetSigSize(u32 type)
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{
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return (u64)((type == SignatureType_Rsa4096Sha1 || type == SignatureType_Rsa4096Sha256) ? MEMBER_SIZE(SignatureBlockRsa4096, signature) : \
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((type == SignatureType_Rsa2048Sha1 || type == SignatureType_Rsa2048Sha256) ? MEMBER_SIZE(SignatureBlockRsa2048, signature) : \
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((type == SignatureType_Ecc480Sha1 || type == SignatureType_Ecc480Sha256) ? MEMBER_SIZE(SignatureBlockEcc480, signature) : \
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(type == SignatureType_Hmac160Sha1 ? MEMBER_SIZE(SignatureBlockHmac160, signature) : 0))));
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}
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NX_INLINE u64 signatureGetBlockSize(u32 type)
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{
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return (u64)((type == SignatureType_Rsa4096Sha1 || type == SignatureType_Rsa4096Sha256) ? sizeof(SignatureBlockRsa4096) : \
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((type == SignatureType_Rsa2048Sha1 || type == SignatureType_Rsa2048Sha256) ? sizeof(SignatureBlockRsa2048) : \
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((type == SignatureType_Ecc480Sha1 || type == SignatureType_Ecc480Sha256) ? sizeof(SignatureBlockEcc480) : \
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(type == SignatureType_Hmac160Sha1 ? sizeof(SignatureBlockHmac160) : 0))));
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}
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NX_INLINE void *signatureGetPayload(void *buf, bool big_endian_sig_type)
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{
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if (!buf) return NULL;
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u32 sig_type = signatureGetSigType(buf, big_endian_sig_type);
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return (signatureIsValidSigType(sig_type) ? (void*)((u8*)buf + signatureGetBlockSize(sig_type)) : NULL);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __SIGNATURE_H__ */
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