mirror of
https://github.com/jakcron/nstool.git
synced 2024-12-22 18:55:29 +00:00
103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
#include <cstdio>
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#include <crypto/aes.h>
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#include <fnd/file_io.h>
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#include <fnd/memory_blob.h>
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#include <nx/NXCrypto.h>
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#include <nx/NcaHeader.h>
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#include <inttypes.h>
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const size_t kNcaSectorSize = 0x200;
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void initNcaCtr(u8 ctr[crypto::aes::kAesBlockSize], u32 generation)
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{
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memset(ctr, 0, crypto::aes::kAesBlockSize);
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for (size_t i = 0; i < 4; i++)
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{
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ctr[7 - i] = (generation >> i * 8) & 0xff;
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}
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}
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void hexDump(const u8* data, size_t len)
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{
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for (size_t i = 0; i < len; i++)
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{
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printf("%02X", data[i]);
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}
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}
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void decryptNcaSectorXts(const fnd::MemoryBlob& nca, u8 out[kNcaSectorSize], size_t sector, const u8* key1, const u8* key2)
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{
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u8 tweak[crypto::aes::kAesBlockSize];
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crypto::aes::AesXtsMakeTweak(tweak, sector);
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crypto::aes::AesXtsDecryptSector(nca.data() + sector*kNcaSectorSize, kNcaSectorSize, key1, key2, tweak, out);
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}
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void decryptNcaSectorCtr(const fnd::MemoryBlob& nca, u8 out[kNcaSectorSize], size_t sector, const u8* key)
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{
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u8 ctr[crypto::aes::kAesBlockSize];
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initNcaCtr(ctr, 0);
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crypto::aes::AesIncrementCounter(ctr, (sector*kNcaSectorSize)/crypto::aes::kAesBlockSize, ctr);
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crypto::aes::AesCtr(nca.data() + sector*kNcaSectorSize, kNcaSectorSize, key, ctr, out);
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}
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void dumpNcaSector(u8 out[kNcaSectorSize])
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{
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for (size_t j = 0; j < kNcaSectorSize / crypto::aes::kAesBlockSize; j++)
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{
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hexDump(out + j * crypto::aes::kAesBlockSize, crypto::aes::kAesBlockSize);
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printf("\n");
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}
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}
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int main(int argc, char** argv)
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{
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if (argc < 2)
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{
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printf("usage: ncatool <nca file>\n");
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return 1;
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}
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fnd::MemoryBlob nca;
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fnd::FileIO::ReadFile(argv[1], nca);
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u8 sector[kNcaSectorSize];
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// nca test
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if (argc == 2)
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{
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decryptNcaSectorXts(nca, sector, 1, nx::crypto::aes::nca_header_key[0], nx::crypto::aes::nca_header_key[1]);
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NcaHeader hdr;
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hdr.importBinary(sector);
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printf("NCA Header\n");
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printf(" Size: 0x%" PRIx64 "\n", hdr.getNcaSize());
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printf(" ProgID: 0x%016" PRIx64 "\n", hdr.getProgramId());
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printf(" Unk0: 0x%" PRIx32 "\n", hdr.getUnk());
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printf(" Sections:\n");
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for (size_t i = 0; i < hdr.getSections().size(); i++)
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{
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const NcaHeader::sSection& section = hdr.getSections()[i];
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printf(" %lu:\n", i);
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printf(" Start Blk: %" PRId32 "\n", section.start_blk);
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printf(" End Blk: %" PRId32 "\n", section.end_blk);
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printf(" Offset: 0x%" PRIx64 "\n", section.offset);
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printf(" Size: 0x%" PRIx64 "\n", section.size);
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printf(" KeyType: 0x%02x\n", section.key_type);
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printf(" Hash: ");
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hexDump(section.hash.bytes, crypto::sha::kSha256HashLen);
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printf("\n");
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}
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printf(" AES Keys:\n");
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for (size_t i = 0; i < hdr.getAesKeys().size(); i++)
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{
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printf(" %lu: ", i);
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hexDump(hdr.getAesKeys()[i].key, crypto::aes::kAes128KeySize);
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printf("\n");
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}
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}
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return 0;
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} |