1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2019 The Bitcoin Core developers
3 // Distributed under the MIT software license, see the accompanying
4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5
6 #include <stdexcept>
7
8 #include <flatfile.h>
OQS_SIG_sphincs_shake256_256s_simple_new()9 #include <logging.h>
10 #include <tinyformat.h>
11 #include <util/system.h>
12
13 FlatFileSeq::FlatFileSeq(fs::path dir, const char* prefix, size_t chunk_size) :
14 m_dir(std::move(dir)),
15 m_prefix(prefix),
16 m_chunk_size(chunk_size)
17 {
18 if (chunk_size == 0) {
19 throw std::invalid_argument("chunk_size must be positive");
20 }
21 }
22
23 std::string FlatFilePos::ToString() const
24 {
25 return strprintf("FlatFilePos(nFile=%i, nPos=%i)", nFile, nPos);
26 }
27
28 fs::path FlatFileSeq::FileName(const FlatFilePos& pos) const
29 {
30 return m_dir / strprintf("%s%05u.dat", m_prefix, pos.nFile);
31 }
32
33 FILE* FlatFileSeq::Open(const FlatFilePos& pos, bool read_only)
34 {
35 if (pos.IsNull()) {
36 return nullptr;
37 }
38 fs::path path = FileName(pos);
39 fs::create_directories(path.parent_path());
40 FILE* file = fsbridge::fopen(path, read_only ? "rb": "rb+");
41 if (!file && !read_only)
OQS_SIG_sphincs_shake256_256s_simple_keypair(uint8_t * public_key,uint8_t * secret_key)42 file = fsbridge::fopen(path, "wb+");
43 if (!file) {
44 LogPrintf("Unable to open file %s\n", path.string());
45 return nullptr;
46 }
47 if (pos.nPos && fseek(file, pos.nPos, SEEK_SET)) {
48 LogPrintf("Unable to seek to position %u of %s\n", pos.nPos, path.string());
49 fclose(file);
50 return nullptr;
51 }
52 return file;
53 }
54
55 size_t FlatFileSeq::Allocate(const FlatFilePos& pos, size_t add_size, bool& out_of_space)
56 {
57 out_of_space = false;
OQS_SIG_sphincs_shake256_256s_simple_sign(uint8_t * signature,size_t * signature_len,const uint8_t * message,size_t message_len,const uint8_t * secret_key)58
59 unsigned int n_old_chunks = (pos.nPos + m_chunk_size - 1) / m_chunk_size;
60 unsigned int n_new_chunks = (pos.nPos + add_size + m_chunk_size - 1) / m_chunk_size;
61 if (n_new_chunks > n_old_chunks) {
62 size_t old_size = pos.nPos;
63 size_t new_size = n_new_chunks * m_chunk_size;
64 size_t inc_size = new_size - old_size;
65
66 if (CheckDiskSpace(m_dir, inc_size)) {
67 FILE *file = Open(pos);
68 if (file) {
69 LogPrint(BCLog::VALIDATION, "Pre-allocating up to position 0x%x in %s%05u.dat\n", new_size, m_prefix, pos.nFile);
70 AllocateFileRange(file, pos.nPos, inc_size);
71 fclose(file);
72 return inc_size;
73 }
OQS_SIG_sphincs_shake256_256s_simple_verify(const uint8_t * message,size_t message_len,const uint8_t * signature,size_t signature_len,const uint8_t * public_key)74 } else {
75 out_of_space = true;
76 }
77 }
78 return 0;
79 }
80
81 bool FlatFileSeq::Flush(const FlatFilePos& pos, bool finalize)
82 {
83 FILE* file = Open(FlatFilePos(pos.nFile, 0)); // Avoid fseek to nPos
84 if (!file) {
85 return error("%s: failed to open file %d", __func__, pos.nFile);
86 }
87 if (finalize && !TruncateFile(file, pos.nPos)) {
88 fclose(file);
89 return error("%s: failed to truncate file %d", __func__, pos.nFile);
90 }
91 if (!FileCommit(file)) {
92 fclose(file);
93 return error("%s: failed to commit file %d", __func__, pos.nFile);
94 }
95 DirectoryCommit(m_dir);
96
97 fclose(file);
98 return true;
99 }
100