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
|
#include "command.hh"
#include "hash.hh"
#include "legacy.hh"
#include "shared.hh"
using namespace nix;
struct CmdHash : Command
{
enum Mode { mFile, mPath };
Mode mode;
Base base = SRI;
bool truncate = false;
HashType ht = htSHA256;
std::vector<std::string> paths;
CmdHash(Mode 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);
mkFlag()
.longName("type")
.mkHashTypeFlag(&ht);
expectArgs("paths", &paths);
}
std::string description() override
{
return mode == mFile
? "print cryptographic hash of a regular file"
: "print cryptographic hash of the NAR serialisation of a path";
}
void run() override
{
for (auto path : paths) {
Hash h = mode == mFile ? hashFile(ht, path) : hashPath(ht, path).first;
if (truncate && h.hashSize > 20) h = compressHash(h, 20);
std::cout << format("%1%\n") %
h.to_string(base, base == SRI);
}
}
};
static RegisterCommand r1("hash-file", [](){ return make_ref<CmdHash>(CmdHash::mFile); });
static RegisterCommand r2("hash-path", [](){ return make_ref<CmdHash>(CmdHash::mPath); });
struct CmdToBase : Command
{
Base base;
HashType ht = htUnknown;
std::vector<std::string> args;
CmdToBase(Base base) : base(base)
{
mkFlag()
.longName("type")
.mkHashTypeFlag(&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");
}
void run() override
{
for (auto s : args)
std::cout << fmt("%s\n", Hash(s, ht).to_string(base, base == SRI));
}
};
static RegisterCommand r3("to-base16", [](){ return make_ref<CmdToBase>(Base16); });
static RegisterCommand r4("to-base32", [](){ return make_ref<CmdToBase>(Base32); });
static RegisterCommand r5("to-base64", [](){ return make_ref<CmdToBase>(Base64); });
static RegisterCommand r6("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);
if (ht == htUnknown)
throw UsageError(format("unknown hash type '%1%'") % 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 ? CmdHash::mFile : CmdHash::mPath);
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 s1("nix-hash", compatNixHash);
|
