1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
#include "command.hh"
#include "hash.hh"
#include "content-address.hh"
#include "legacy.hh"
#include "shared.hh"
#include "references.hh"
#include "archive.hh"
using namespace nix;
struct CmdHash : Command
{
FileIngestionMethod mode;
Base base = SRI;
bool truncate = false;
HashType ht = htSHA256;
std::vector<std::string> paths;
std::optional<std::string> modulus;
CmdHash(FileIngestionMethod mode) : mode(mode)
{
mkFlag(0, "sri", "print hash in SRI format", &base, SRI);
mkFlag(0, "base64", "print hash in base-64", &base, Base64);
mkFlag(0, "base32", "print hash in base-32 (Nix-specific)", &base, Base32);
mkFlag(0, "base16", "print hash in base-16", &base, Base16);
addFlag(Flag::mkHashTypeFlag("type", &ht));
#if 0
mkFlag()
.longName("modulo")
.description("compute hash modulo specified string")
.labels({"modulus"})
.dest(&modulus);
#endif
expectArgs({
.label = "paths",
.handler = {&paths},
.completer = completePath
});
}
std::string description() override
{
const char* d;
switch (mode) {
case FileIngestionMethod::Flat:
d = "print cryptographic hash of a regular file";
break;
case FileIngestionMethod::Recursive:
d = "print cryptographic hash of the NAR serialisation of a path";
};
return d;
}
Category category() override { return catUtility; }
void run() override
{
for (auto path : paths) {
std::unique_ptr<AbstractHashSink> hashSink;
if (modulus)
hashSink = std::make_unique<HashModuloSink>(ht, *modulus);
else
hashSink = std::make_unique<HashSink>(ht);
switch (mode) {
case FileIngestionMethod::Flat:
readFile(path, *hashSink);
break;
case FileIngestionMethod::Recursive:
dumpPath(path, *hashSink);
break;
}
Hash h = hashSink->finish().first;
if (truncate && h.hashSize > 20) h = compressHash(h, 20);
logger->stdout(h.to_string(base, base == SRI));
}
}
};
static RegisterCommand rCmdHashFile("hash-file", [](){ return make_ref<CmdHash>(FileIngestionMethod::Flat); });
static RegisterCommand rCmdHashPath("hash-path", [](){ return make_ref<CmdHash>(FileIngestionMethod::Recursive); });
struct CmdToBase : Command
{
Base base;
std::optional<HashType> ht;
std::vector<std::string> args;
CmdToBase(Base base) : base(base)
{
addFlag(Flag::mkHashTypeOptFlag("type", &ht));
expectArgs("strings", &args);
}
std::string description() override
{
return fmt("convert a hash to %s representation",
base == Base16 ? "base-16" :
base == Base32 ? "base-32" :
base == Base64 ? "base-64" :
"SRI");
}
Category category() override { return catUtility; }
void run() override
{
for (auto s : args)
logger->stdout(Hash::parseAny(s, ht).to_string(base, base == SRI));
}
};
static RegisterCommand rCmdToBase16("to-base16", [](){ return make_ref<CmdToBase>(Base16); });
static RegisterCommand rCmdToBase32("to-base32", [](){ return make_ref<CmdToBase>(Base32); });
static RegisterCommand rCmdToBase64("to-base64", [](){ return make_ref<CmdToBase>(Base64); });
static RegisterCommand rCmdToSRI("to-sri", [](){ return make_ref<CmdToBase>(SRI); });
/* Legacy nix-hash command. */
static int compatNixHash(int argc, char * * argv)
{
HashType ht = htMD5;
bool flat = false;
bool base32 = false;
bool truncate = false;
enum { opHash, opTo32, opTo16 } op = opHash;
std::vector<std::string> ss;
parseCmdLine(argc, argv, [&](Strings::iterator & arg, const Strings::iterator & end) {
if (*arg == "--help")
showManPage("nix-hash");
else if (*arg == "--version")
printVersion("nix-hash");
else if (*arg == "--flat") flat = true;
else if (*arg == "--base32") base32 = true;
else if (*arg == "--truncate") truncate = true;
else if (*arg == "--type") {
string s = getArg(*arg, arg, end);
ht = parseHashType(s);
}
else if (*arg == "--to-base16") op = opTo16;
else if (*arg == "--to-base32") op = opTo32;
else if (*arg != "" && arg->at(0) == '-')
return false;
else
ss.push_back(*arg);
return true;
});
if (op == opHash) {
CmdHash cmd(flat ? FileIngestionMethod::Flat : FileIngestionMethod::Recursive);
cmd.ht = ht;
cmd.base = base32 ? Base32 : Base16;
cmd.truncate = truncate;
cmd.paths = ss;
cmd.run();
}
else {
CmdToBase cmd(op == opTo32 ? Base32 : Base16);
cmd.args = ss;
cmd.ht = ht;
cmd.run();
}
return 0;
}
static RegisterLegacyCommand r_nix_hash("nix-hash", compatNixHash);
|
