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
214
215
216
217
|
/*
* loader.c - load platform dependent DSO containing freebl implementation.
*
* 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/. */
#define _GNU_SOURCE 1
#include "loader.h"
#include "prmem.h"
#include "prerror.h"
#include "prinit.h"
#include "prenv.h"
#include "blname.c"
#include "prio.h"
#include "prprf.h"
#include <stdio.h>
#include "prsystem.h"
#include "nsslowhash.h"
#include <dlfcn.h>
#include "pratom.h"
static PRLibrary *blLib;
#define LSB(x) ((x)&0xff)
#define MSB(x) ((x) >> 8)
static const NSSLOWVector *vector;
static const char *libraryName = NULL;
/* pretty much only glibc uses this, make sure we don't have any depenencies
* on nspr.. */
#undef PORT_Alloc
#undef PORT_Free
#define PORT_Alloc malloc
#define PR_Malloc malloc
#define PORT_Free free
#define PR_Free free
#define PR_GetDirectorySeparator() '/'
#define PR_LoadLibraryWithFlags(libspec, flags) \
(PRLibrary *)dlopen(libSpec.value.pathname, RTLD_NOW | RTLD_LOCAL)
#define PR_GetLibraryFilePathname(name, addr) \
freebl_lowhash_getLibraryFilePath(addr)
static char *
freebl_lowhash_getLibraryFilePath(void *addr)
{
Dl_info dli;
if (dladdr(addr, &dli) == 0) {
return NULL;
}
return strdup(dli.dli_fname);
}
/*
* The PR_LoadLibraryWithFlags call above defines this variable away, so we
* don't need it..
*/
#ifdef nodef
static const char *NameOfThisSharedLib =
SHLIB_PREFIX "freebl" SHLIB_VERSION "." SHLIB_SUFFIX;
#endif
#include "genload.c"
/* This function must be run only once. */
/* determine if hybrid platform, then actually load the DSO. */
static PRStatus
freebl_LoadDSO(void)
{
PRLibrary *handle;
const char *name = getLibName();
if (!name) {
/*PR_SetError(PR_LOAD_LIBRARY_ERROR,0); */
return PR_FAILURE;
}
handle = loader_LoadLibrary(name);
if (handle) {
void *address = dlsym(handle, "NSSLOW_GetVector");
if (address) {
NSSLOWGetVectorFn *getVector = (NSSLOWGetVectorFn *)address;
const NSSLOWVector *dsoVector = getVector();
if (dsoVector) {
unsigned short dsoVersion = dsoVector->version;
unsigned short myVersion = NSSLOW_VERSION;
if (MSB(dsoVersion) == MSB(myVersion) &&
LSB(dsoVersion) >= LSB(myVersion) &&
dsoVector->length >= sizeof(NSSLOWVector)) {
vector = dsoVector;
libraryName = name;
blLib = handle;
return PR_SUCCESS;
}
}
}
(void)dlclose(handle);
}
return PR_FAILURE;
}
static PRCallOnceType loadFreeBLOnce;
static PRStatus
freebl_RunLoaderOnce(void)
{
/* Don't have NSPR, so can use the real PR_CallOnce, implement a stripped
* down version. */
if (loadFreeBLOnce.initialized) {
return loadFreeBLOnce.status;
}
if (__sync_lock_test_and_set(&loadFreeBLOnce.inProgress, 1) == 0) {
loadFreeBLOnce.status = freebl_LoadDSO();
loadFreeBLOnce.initialized = 1;
} else {
/* shouldn't have a lot of takers on the else clause, which is good
* since we don't have condition variables yet.
* 'initialized' only ever gets set (not cleared) so we don't
* need the traditional locks. */
while (!loadFreeBLOnce.initialized) {
sleep(1); /* don't have condition variables, just give up the CPU */
}
}
return loadFreeBLOnce.status;
}
const FREEBLVector *
FREEBL_GetVector(void)
{
if (!vector && PR_SUCCESS != freebl_RunLoaderOnce()) {
return NULL;
}
if (vector) {
return (vector->p_FREEBL_GetVector)();
}
return NULL;
}
NSSLOWInitContext *
NSSLOW_Init(void)
{
if (!vector && PR_SUCCESS != freebl_RunLoaderOnce())
return NULL;
return (vector->p_NSSLOW_Init)();
}
void
NSSLOW_Shutdown(NSSLOWInitContext *context)
{
if (!vector && PR_SUCCESS != freebl_RunLoaderOnce())
return;
(vector->p_NSSLOW_Shutdown)(context);
}
void
NSSLOW_Reset(NSSLOWInitContext *context)
{
if (!vector && PR_SUCCESS != freebl_RunLoaderOnce())
return;
(vector->p_NSSLOW_Reset)(context);
}
NSSLOWHASHContext *
NSSLOWHASH_NewContext(
NSSLOWInitContext *initContext,
HASH_HashType hashType)
{
if (!vector && PR_SUCCESS != freebl_RunLoaderOnce())
return NULL;
return (vector->p_NSSLOWHASH_NewContext)(initContext, hashType);
}
void
NSSLOWHASH_Begin(NSSLOWHASHContext *context)
{
if (!vector && PR_SUCCESS != freebl_RunLoaderOnce())
return;
(vector->p_NSSLOWHASH_Begin)(context);
}
void
NSSLOWHASH_Update(NSSLOWHASHContext *context,
const unsigned char *buf,
unsigned int len)
{
if (!vector && PR_SUCCESS != freebl_RunLoaderOnce())
return;
(vector->p_NSSLOWHASH_Update)(context, buf, len);
}
void
NSSLOWHASH_End(NSSLOWHASHContext *context,
unsigned char *buf,
unsigned int *ret, unsigned int len)
{
if (!vector && PR_SUCCESS != freebl_RunLoaderOnce())
return;
(vector->p_NSSLOWHASH_End)(context, buf, ret, len);
}
void
NSSLOWHASH_Destroy(NSSLOWHASHContext *context)
{
if (!vector && PR_SUCCESS != freebl_RunLoaderOnce())
return;
(vector->p_NSSLOWHASH_Destroy)(context);
}
unsigned int
NSSLOWHASH_Length(NSSLOWHASHContext *context)
{
if (!vector && PR_SUCCESS != freebl_RunLoaderOnce())
return -1;
return (vector->p_NSSLOWHASH_Length)(context);
}
|
