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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 "nsCryptoHash.h"
#include <algorithm>
#include "mozilla/ArrayUtils.h"
#include "mozilla/Base64.h"
#include "mozilla/Casting.h"
#include "nsDependentString.h"
#include "nsIInputStream.h"
#include "nsNSSComponent.h"
#include "nsString.h"
#include "pk11pub.h"
#include "sechash.h"
using namespace mozilla;
namespace {
static const uint64_t STREAM_BUFFER_SIZE = 4096;
} // namespace
//---------------------------------------------
// Implementing nsICryptoHash
//---------------------------------------------
nsCryptoHash::nsCryptoHash() : mHashContext(nullptr), mInitialized(false) {}
NS_IMPL_ISUPPORTS(nsCryptoHash, nsICryptoHash)
NS_IMETHODIMP
nsCryptoHash::Init(uint32_t algorithm) {
HASH_HashType hashType;
switch (algorithm) {
case nsICryptoHash::MD5:
hashType = HASH_AlgMD5;
break;
case nsICryptoHash::SHA1:
hashType = HASH_AlgSHA1;
break;
case nsICryptoHash::SHA256:
hashType = HASH_AlgSHA256;
break;
case nsICryptoHash::SHA384:
hashType = HASH_AlgSHA384;
break;
case nsICryptoHash::SHA512:
hashType = HASH_AlgSHA512;
break;
default:
return NS_ERROR_INVALID_ARG;
}
if (mHashContext) {
if (!mInitialized && HASH_GetType(mHashContext.get()) == hashType) {
mInitialized = true;
HASH_Begin(mHashContext.get());
return NS_OK;
}
// Destroy current hash context if the type was different
// or Finish method wasn't called.
mHashContext = nullptr;
mInitialized = false;
}
mHashContext.reset(HASH_Create(hashType));
if (!mHashContext) {
return NS_ERROR_INVALID_ARG;
}
HASH_Begin(mHashContext.get());
mInitialized = true;
return NS_OK;
}
NS_IMETHODIMP
nsCryptoHash::InitWithString(const nsACString& aAlgorithm) {
if (aAlgorithm.LowerCaseEqualsLiteral("md5")) return Init(nsICryptoHash::MD5);
if (aAlgorithm.LowerCaseEqualsLiteral("sha1"))
return Init(nsICryptoHash::SHA1);
if (aAlgorithm.LowerCaseEqualsLiteral("sha256"))
return Init(nsICryptoHash::SHA256);
if (aAlgorithm.LowerCaseEqualsLiteral("sha384"))
return Init(nsICryptoHash::SHA384);
if (aAlgorithm.LowerCaseEqualsLiteral("sha512"))
return Init(nsICryptoHash::SHA512);
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP
nsCryptoHash::Update(const uint8_t* data, uint32_t len) {
if (!mInitialized) {
return NS_ERROR_NOT_INITIALIZED;
}
HASH_Update(mHashContext.get(), data, len);
return NS_OK;
}
NS_IMETHODIMP
nsCryptoHash::UpdateFromStream(nsIInputStream* data, uint32_t aLen) {
if (!mInitialized) return NS_ERROR_NOT_INITIALIZED;
if (!data) return NS_ERROR_INVALID_ARG;
uint64_t n;
nsresult rv = data->Available(&n);
if (NS_FAILED(rv)) return rv;
// if the user has passed UINT32_MAX, then read
// everything in the stream
uint64_t len = aLen;
if (aLen == UINT32_MAX) len = n;
// So, if the stream has NO data available for the hash,
// or if the data available is less then what the caller
// requested, we can not fulfill the hash update. In this
// case, just return NS_ERROR_NOT_AVAILABLE indicating
// that there is not enough data in the stream to satisify
// the request.
if (n == 0 || n < len) {
return NS_ERROR_NOT_AVAILABLE;
}
char buffer[STREAM_BUFFER_SIZE];
while (len > 0) {
uint64_t readLimit = std::min<uint64_t>(STREAM_BUFFER_SIZE, len);
uint32_t read;
rv = data->Read(buffer, AssertedCast<uint32_t>(readLimit), &read);
if (NS_FAILED(rv)) {
return rv;
}
rv = Update(BitwiseCast<uint8_t*>(buffer), read);
if (NS_FAILED(rv)) {
return rv;
}
len -= read;
}
return NS_OK;
}
NS_IMETHODIMP
nsCryptoHash::Finish(bool ascii, nsACString& _retval) {
if (!mInitialized) {
return NS_ERROR_NOT_INITIALIZED;
}
uint32_t hashLen = 0;
unsigned char buffer[HASH_LENGTH_MAX];
HASH_End(mHashContext.get(), buffer, &hashLen, HASH_LENGTH_MAX);
mInitialized = false;
if (ascii) {
nsDependentCSubstring dataStr(BitwiseCast<char*>(buffer), hashLen);
return Base64Encode(dataStr, _retval);
}
_retval.Assign(BitwiseCast<char*>(buffer), hashLen);
return NS_OK;
}
nsresult NS_NewCryptoHash(uint32_t aHashType, nsICryptoHash** aOutHasher) {
MOZ_ASSERT(aOutHasher);
if (NS_WARN_IF(!EnsureNSSInitializedChromeOrContent())) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsICryptoHash> hasher = new nsCryptoHash();
nsresult rv = hasher->Init(aHashType);
if (NS_SUCCEEDED(rv)) {
hasher.forget(aOutHasher);
}
return rv;
}
nsresult NS_NewCryptoHash(const nsACString& aHashType,
nsICryptoHash** aOutHasher) {
MOZ_ASSERT(aOutHasher);
if (NS_WARN_IF(!EnsureNSSInitializedChromeOrContent())) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsICryptoHash> hasher = new nsCryptoHash();
nsresult rv = hasher->InitWithString(aHashType);
if (NS_SUCCEEDED(rv)) {
hasher.forget(aOutHasher);
}
return rv;
}
|
