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43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
/*
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* rsa.c
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*
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* Copyright (c) 2018-2019, SciresM.
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* Copyright (c) 2018-2019, The-4n.
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* Copyright (c) 2020-2021, 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 it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* nxdumptool is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* 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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#pragma once
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#ifndef __RSA_H__
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#define __RSA_H__
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#define RSA2048_SIG_SIZE 0x100
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#define RSA2048_PUBKEY_SIZE RSA2048_SIG_SIZE
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/// Generates a RSA-2048-PSS with SHA-256 signature using a custom RSA-2048 private key.
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/// Suitable to replace the ACID signature in a Program NCA header.
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/// Destination buffer size should be at least RSA2048_SIG_SIZE.
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bool rsa2048GenerateSha256BasedPssSignature(void *dst, const void *src, size_t size);
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/// Returns a pointer to the RSA-2048 public key that can be used to verify signatures generated by rsa2048GenerateSha256BasedPssSignature().
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/// Suitable to replace the ACID public key in a NPDM.
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const u8 *rsa2048GetCustomPublicKey(void);
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/// Performs RSA-2048-OAEP decryption and verification. Used to decrypt the titlekey block from tickets with personalized crypto.
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bool rsa2048OaepDecryptAndVerify(void *dst, size_t dst_size, const void *signature, const void *modulus, const void *exponent, size_t exponent_size, const void *label_hash, size_t *out_size);
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#endif /* __RSA_H__ */
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