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
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "digesttool.h"
#include "argparse.h"
#include "nss_scoped_ptrs.h"
#include "util.h"
#include <algorithm>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <hasht.h> // contains supported digest types
#include <nss.h>
#include <pk11pub.h>
#include <prio.h>
static SECOidData* HashTypeToOID(HASH_HashType hashtype) {
SECOidTag hashtag;
if (hashtype <= HASH_AlgNULL || hashtype >= HASH_AlgTOTAL) {
return nullptr;
}
switch (hashtype) {
case HASH_AlgMD5:
hashtag = SEC_OID_MD5;
break;
case HASH_AlgSHA1:
hashtag = SEC_OID_SHA1;
break;
case HASH_AlgSHA224:
hashtag = SEC_OID_SHA224;
break;
case HASH_AlgSHA256:
hashtag = SEC_OID_SHA256;
break;
case HASH_AlgSHA384:
hashtag = SEC_OID_SHA384;
break;
case HASH_AlgSHA512:
hashtag = SEC_OID_SHA512;
break;
default:
return nullptr;
}
return SECOID_FindOIDByTag(hashtag);
}
static SECOidData* HashNameToOID(const std::string& hashName) {
for (size_t htype = HASH_AlgNULL + 1; htype < HASH_AlgTOTAL; htype++) {
SECOidData* hashOID = HashTypeToOID(static_cast<HASH_HashType>(htype));
if (hashOID && std::string(hashOID->desc) == hashName) {
return hashOID;
}
}
return nullptr;
}
static bool Digest(const ArgParser& parser, SECOidData* hashOID);
static bool ComputeDigest(std::istream& is, ScopedPK11Context& hashCtx);
bool DigestTool::Run(const std::vector<std::string>& arguments) {
ArgParser parser(arguments);
if (parser.GetPositionalArgumentCount() != 1) {
Usage();
return false;
}
// no need for a db for the digest tool
SECStatus rv = NSS_NoDB_Init(".");
if (rv != SECSuccess) {
std::cerr << "NSS init failed!" << std::endl;
return false;
}
std::string hashName = parser.GetPositionalArgument(0);
std::transform(hashName.begin(), hashName.end(), hashName.begin(), ::toupper);
SECOidData* hashOID = HashNameToOID(hashName);
if (hashOID == nullptr) {
std::cerr << "Error: Unknown digest type "
<< parser.GetPositionalArgument(0) << "." << std::endl;
return false;
}
bool ret = Digest(parser, hashOID);
// shutdown nss
if (NSS_Shutdown() != SECSuccess) {
std::cerr << "NSS Shutdown failed!" << std::endl;
return false;
}
return ret;
}
void DigestTool::Usage() {
std::cerr << "Usage: nss digest md5|sha-1|sha-224|sha-256|sha-384|sha-512 "
"[--infile <path>]"
<< std::endl;
}
static bool Digest(const ArgParser& parser, SECOidData* hashOID) {
std::string inputFile;
if (parser.Has("--infile")) {
inputFile = parser.Get("--infile");
}
ScopedPK11Context hashCtx(PK11_CreateDigestContext(hashOID->offset));
if (hashCtx == nullptr) {
std::cerr << "Creating digest context failed." << std::endl;
return false;
}
PK11_DigestBegin(hashCtx.get());
std::ifstream fis;
std::istream& is = GetStreamFromFileOrStdin(inputFile, fis);
if (!is.good() || !ComputeDigest(is, hashCtx)) {
return false;
}
unsigned char digest[HASH_LENGTH_MAX];
unsigned int len;
SECStatus rv = PK11_DigestFinal(hashCtx.get(), digest, &len, HASH_LENGTH_MAX);
if (rv != SECSuccess || len == 0) {
std::cerr << "Calculating final hash value failed." << std::endl;
return false;
}
// human readable output
for (size_t i = 0; i < len; i++) {
std::cout << std::setw(2) << std::setfill('0') << std::hex
<< static_cast<int>(digest[i]);
}
std::cout << std::endl;
return true;
}
static bool ComputeDigest(std::istream& is, ScopedPK11Context& hashCtx) {
while (is) {
unsigned char buf[4096];
is.read(reinterpret_cast<char*>(buf), sizeof(buf));
if (is.fail() && !is.eof()) {
std::cerr << "Error reading from input stream." << std::endl;
return false;
}
SECStatus rv = PK11_DigestOp(hashCtx.get(), buf, is.gcount());
if (rv != SECSuccess) {
std::cerr << "PK11_DigestOp failed." << std::endl;
return false;
}
}
return true;
}
|
