1
by Aurelien Jarno
Import upstream version 2.9 |
1 |
/* One way encryption based on SHA256 sum.
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
2 |
Copyright (C) 2007, 2009 Free Software Foundation, Inc.
|
1
by Aurelien Jarno
Import upstream version 2.9 |
3 |
This file is part of the GNU C Library.
|
4 |
Contributed by Ulrich Drepper <drepper@redhat.com>, 2007.
|
|
5 |
||
6 |
The GNU C Library is free software; you can redistribute it and/or
|
|
7 |
modify it under the terms of the GNU Lesser General Public
|
|
8 |
License as published by the Free Software Foundation; either
|
|
9 |
version 2.1 of the License, or (at your option) any later version.
|
|
10 |
||
11 |
The GNU C Library is distributed in the hope that it will be useful,
|
|
12 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
13 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
14 |
Lesser General Public License for more details.
|
|
15 |
||
16 |
You should have received a copy of the GNU Lesser General Public
|
|
17 |
License along with the GNU C Library; if not, write to the Free
|
|
18 |
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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|
19 |
02111-1307 USA. */
|
|
20 |
||
21 |
#include <assert.h> |
|
22 |
#include <errno.h> |
|
23 |
#include <stdbool.h> |
|
24 |
#include <stdlib.h> |
|
25 |
#include <string.h> |
|
26 |
#include <sys/param.h> |
|
27 |
||
28 |
#include "sha256.h" |
|
29 |
||
30 |
||
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
31 |
#ifdef USE_NSS
|
32 |
typedef int PRBool; |
|
33 |
# include <hasht.h>
|
|
34 |
# include <nsslowhash.h>
|
|
35 |
||
36 |
# define sha256_init_ctx(ctxp, nss_ctxp) \
|
|
37 |
do \
|
|
38 |
{ \
|
|
39 |
if (((nss_ctxp = NSSLOWHASH_NewContext (nss_ictx, HASH_AlgSHA256)) \
|
|
40 |
== NULL)) \
|
|
41 |
{ \
|
|
42 |
if (nss_ctx != NULL) \
|
|
43 |
NSSLOWHASH_Destroy (nss_ctx); \
|
|
44 |
if (nss_alt_ctx != NULL) \
|
|
45 |
NSSLOWHASH_Destroy (nss_alt_ctx); \
|
|
46 |
return NULL; \
|
|
47 |
} \
|
|
48 |
NSSLOWHASH_Begin (nss_ctxp); \
|
|
49 |
} \
|
|
50 |
while (0)
|
|
51 |
||
52 |
# define sha256_process_bytes(buf, len, ctxp, nss_ctxp) \
|
|
53 |
NSSLOWHASH_Update (nss_ctxp, (const unsigned char *) buf, len)
|
|
54 |
||
55 |
# define sha256_finish_ctx(ctxp, nss_ctxp, result) \
|
|
56 |
do \
|
|
57 |
{ \
|
|
58 |
unsigned int ret; \
|
|
59 |
NSSLOWHASH_End (nss_ctxp, result, &ret, sizeof (result)); \
|
|
60 |
assert (ret == sizeof (result)); \
|
|
61 |
NSSLOWHASH_Destroy (nss_ctxp); \
|
|
62 |
nss_ctxp = NULL; \
|
|
63 |
} \
|
|
64 |
while (0)
|
|
65 |
#else
|
|
66 |
# define sha256_init_ctx(ctxp, nss_ctxp) \
|
|
67 |
__sha256_init_ctx (ctxp)
|
|
68 |
||
69 |
# define sha256_process_bytes(buf, len, ctxp, nss_ctxp) \
|
|
70 |
__sha256_process_bytes(buf, len, ctxp)
|
|
71 |
||
72 |
# define sha256_finish_ctx(ctxp, nss_ctxp, result) \
|
|
73 |
__sha256_finish_ctx (ctxp, result)
|
|
74 |
#endif
|
|
75 |
||
76 |
||
1
by Aurelien Jarno
Import upstream version 2.9 |
77 |
/* Define our magic string to mark salt for SHA256 "encryption"
|
78 |
replacement. */
|
|
79 |
static const char sha256_salt_prefix[] = "$5$"; |
|
80 |
||
81 |
/* Prefix for optional rounds specification. */
|
|
82 |
static const char sha256_rounds_prefix[] = "rounds="; |
|
83 |
||
84 |
/* Maximum salt string length. */
|
|
85 |
#define SALT_LEN_MAX 16
|
|
86 |
/* Default number of rounds if not explicitly specified. */
|
|
87 |
#define ROUNDS_DEFAULT 5000
|
|
88 |
/* Minimum number of rounds. */
|
|
89 |
#define ROUNDS_MIN 1000
|
|
90 |
/* Maximum number of rounds. */
|
|
91 |
#define ROUNDS_MAX 999999999
|
|
92 |
||
93 |
/* Table with characters for base64 transformation. */
|
|
94 |
static const char b64t[64] = |
|
95 |
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; |
|
96 |
||
97 |
||
98 |
/* Prototypes for local functions. */
|
|
99 |
extern char *__sha256_crypt_r (const char *key, const char *salt, |
|
100 |
char *buffer, int buflen); |
|
101 |
extern char *__sha256_crypt (const char *key, const char *salt); |
|
102 |
||
103 |
||
104 |
char * |
|
105 |
__sha256_crypt_r (key, salt, buffer, buflen) |
|
106 |
const char *key; |
|
107 |
const char *salt; |
|
108 |
char *buffer; |
|
109 |
int buflen; |
|
110 |
{
|
|
111 |
unsigned char alt_result[32] |
|
112 |
__attribute__ ((__aligned__ (__alignof__ (uint32_t)))); |
|
113 |
unsigned char temp_result[32] |
|
114 |
__attribute__ ((__aligned__ (__alignof__ (uint32_t)))); |
|
115 |
size_t salt_len; |
|
116 |
size_t key_len; |
|
117 |
size_t cnt; |
|
118 |
char *cp; |
|
119 |
char *copied_key = NULL; |
|
120 |
char *copied_salt = NULL; |
|
121 |
char *p_bytes; |
|
122 |
char *s_bytes; |
|
123 |
/* Default number of rounds. */
|
|
124 |
size_t rounds = ROUNDS_DEFAULT; |
|
125 |
bool rounds_custom = false; |
|
126 |
||
127 |
/* Find beginning of salt string. The prefix should normally always
|
|
128 |
be present. Just in case it is not. */
|
|
129 |
if (strncmp (sha256_salt_prefix, salt, sizeof (sha256_salt_prefix) - 1) == 0) |
|
130 |
/* Skip salt prefix. */
|
|
131 |
salt += sizeof (sha256_salt_prefix) - 1; |
|
132 |
||
133 |
if (strncmp (salt, sha256_rounds_prefix, sizeof (sha256_rounds_prefix) - 1) |
|
134 |
== 0) |
|
135 |
{
|
|
136 |
const char *num = salt + sizeof (sha256_rounds_prefix) - 1; |
|
137 |
char *endp; |
|
138 |
unsigned long int srounds = strtoul (num, &endp, 10); |
|
139 |
if (*endp == '$') |
|
140 |
{
|
|
141 |
salt = endp + 1; |
|
142 |
rounds = MAX (ROUNDS_MIN, MIN (srounds, ROUNDS_MAX)); |
|
143 |
rounds_custom = true; |
|
144 |
}
|
|
145 |
}
|
|
146 |
||
147 |
salt_len = MIN (strcspn (salt, "$"), SALT_LEN_MAX); |
|
148 |
key_len = strlen (key); |
|
149 |
||
150 |
if ((key - (char *) 0) % __alignof__ (uint32_t) != 0) |
|
151 |
{
|
|
152 |
char *tmp = (char *) alloca (key_len + __alignof__ (uint32_t)); |
|
153 |
key = copied_key = |
|
154 |
memcpy (tmp + __alignof__ (uint32_t) |
|
155 |
- (tmp - (char *) 0) % __alignof__ (uint32_t), |
|
156 |
key, key_len); |
|
157 |
assert ((key - (char *) 0) % __alignof__ (uint32_t) == 0); |
|
158 |
}
|
|
159 |
||
160 |
if ((salt - (char *) 0) % __alignof__ (uint32_t) != 0) |
|
161 |
{
|
|
162 |
char *tmp = (char *) alloca (salt_len + __alignof__ (uint32_t)); |
|
163 |
salt = copied_salt = |
|
164 |
memcpy (tmp + __alignof__ (uint32_t) |
|
165 |
- (tmp - (char *) 0) % __alignof__ (uint32_t), |
|
166 |
salt, salt_len); |
|
167 |
assert ((salt - (char *) 0) % __alignof__ (uint32_t) == 0); |
|
168 |
}
|
|
169 |
||
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
170 |
#ifdef USE_NSS
|
171 |
/* Initialize libfreebl3. */
|
|
172 |
NSSLOWInitContext *nss_ictx = NSSLOW_Init (); |
|
173 |
if (nss_ictx == NULL) |
|
174 |
return NULL; |
|
175 |
NSSLOWHASHContext *nss_ctx = NULL; |
|
176 |
NSSLOWHASHContext *nss_alt_ctx = NULL; |
|
177 |
#else
|
|
178 |
struct sha256_ctx ctx; |
|
179 |
struct sha256_ctx alt_ctx; |
|
180 |
#endif
|
|
181 |
||
1
by Aurelien Jarno
Import upstream version 2.9 |
182 |
/* Prepare for the real work. */
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
183 |
sha256_init_ctx (&ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
184 |
|
185 |
/* Add the key string. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
186 |
sha256_process_bytes (key, key_len, &ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
187 |
|
188 |
/* The last part is the salt string. This must be at most 16
|
|
189 |
characters and it ends at the first `$' character. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
190 |
sha256_process_bytes (salt, salt_len, &ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
191 |
|
192 |
||
193 |
/* Compute alternate SHA256 sum with input KEY, SALT, and KEY. The
|
|
194 |
final result will be added to the first context. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
195 |
sha256_init_ctx (&alt_ctx, nss_alt_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
196 |
|
197 |
/* Add key. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
198 |
sha256_process_bytes (key, key_len, &alt_ctx, nss_alt_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
199 |
|
200 |
/* Add salt. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
201 |
sha256_process_bytes (salt, salt_len, &alt_ctx, nss_alt_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
202 |
|
203 |
/* Add key again. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
204 |
sha256_process_bytes (key, key_len, &alt_ctx, nss_alt_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
205 |
|
206 |
/* Now get result of this (32 bytes) and add it to the other
|
|
207 |
context. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
208 |
sha256_finish_ctx (&alt_ctx, nss_alt_ctx, alt_result); |
1
by Aurelien Jarno
Import upstream version 2.9 |
209 |
|
210 |
/* Add for any character in the key one byte of the alternate sum. */
|
|
211 |
for (cnt = key_len; cnt > 32; cnt -= 32) |
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
212 |
sha256_process_bytes (alt_result, 32, &ctx, nss_ctx); |
213 |
sha256_process_bytes (alt_result, cnt, &ctx, nss_ctx); |
|
1
by Aurelien Jarno
Import upstream version 2.9 |
214 |
|
215 |
/* Take the binary representation of the length of the key and for every
|
|
216 |
1 add the alternate sum, for every 0 the key. */
|
|
217 |
for (cnt = key_len; cnt > 0; cnt >>= 1) |
|
218 |
if ((cnt & 1) != 0) |
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
219 |
sha256_process_bytes (alt_result, 32, &ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
220 |
else
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
221 |
sha256_process_bytes (key, key_len, &ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
222 |
|
223 |
/* Create intermediate result. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
224 |
sha256_finish_ctx (&ctx, nss_ctx, alt_result); |
1
by Aurelien Jarno
Import upstream version 2.9 |
225 |
|
226 |
/* Start computation of P byte sequence. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
227 |
sha256_init_ctx (&alt_ctx, nss_alt_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
228 |
|
229 |
/* For every character in the password add the entire password. */
|
|
230 |
for (cnt = 0; cnt < key_len; ++cnt) |
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
231 |
sha256_process_bytes (key, key_len, &alt_ctx, nss_alt_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
232 |
|
233 |
/* Finish the digest. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
234 |
sha256_finish_ctx (&alt_ctx, nss_alt_ctx, temp_result); |
1
by Aurelien Jarno
Import upstream version 2.9 |
235 |
|
236 |
/* Create byte sequence P. */
|
|
237 |
cp = p_bytes = alloca (key_len); |
|
238 |
for (cnt = key_len; cnt >= 32; cnt -= 32) |
|
239 |
cp = mempcpy (cp, temp_result, 32); |
|
240 |
memcpy (cp, temp_result, cnt); |
|
241 |
||
242 |
/* Start computation of S byte sequence. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
243 |
sha256_init_ctx (&alt_ctx, nss_alt_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
244 |
|
245 |
/* For every character in the password add the entire password. */
|
|
246 |
for (cnt = 0; cnt < 16 + alt_result[0]; ++cnt) |
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
247 |
sha256_process_bytes (salt, salt_len, &alt_ctx, nss_alt_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
248 |
|
249 |
/* Finish the digest. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
250 |
sha256_finish_ctx (&alt_ctx, nss_alt_ctx, temp_result); |
1
by Aurelien Jarno
Import upstream version 2.9 |
251 |
|
252 |
/* Create byte sequence S. */
|
|
253 |
cp = s_bytes = alloca (salt_len); |
|
254 |
for (cnt = salt_len; cnt >= 32; cnt -= 32) |
|
255 |
cp = mempcpy (cp, temp_result, 32); |
|
256 |
memcpy (cp, temp_result, cnt); |
|
257 |
||
258 |
/* Repeatedly run the collected hash value through SHA256 to burn
|
|
259 |
CPU cycles. */
|
|
260 |
for (cnt = 0; cnt < rounds; ++cnt) |
|
261 |
{
|
|
262 |
/* New context. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
263 |
sha256_init_ctx (&ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
264 |
|
265 |
/* Add key or last result. */
|
|
266 |
if ((cnt & 1) != 0) |
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
267 |
sha256_process_bytes (p_bytes, key_len, &ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
268 |
else
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
269 |
sha256_process_bytes (alt_result, 32, &ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
270 |
|
271 |
/* Add salt for numbers not divisible by 3. */
|
|
272 |
if (cnt % 3 != 0) |
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
273 |
sha256_process_bytes (s_bytes, salt_len, &ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
274 |
|
275 |
/* Add key for numbers not divisible by 7. */
|
|
276 |
if (cnt % 7 != 0) |
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
277 |
sha256_process_bytes (p_bytes, key_len, &ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
278 |
|
279 |
/* Add key or last result. */
|
|
280 |
if ((cnt & 1) != 0) |
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
281 |
sha256_process_bytes (alt_result, 32, &ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
282 |
else
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
283 |
sha256_process_bytes (p_bytes, key_len, &ctx, nss_ctx); |
1
by Aurelien Jarno
Import upstream version 2.9 |
284 |
|
285 |
/* Create intermediate result. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
286 |
sha256_finish_ctx (&ctx, nss_ctx, alt_result); |
1
by Aurelien Jarno
Import upstream version 2.9 |
287 |
}
|
288 |
||
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
289 |
#ifdef USE_NSS
|
290 |
/* Free libfreebl3 resources. */
|
|
291 |
NSSLOW_Shutdown (nss_ictx); |
|
292 |
#endif
|
|
293 |
||
1
by Aurelien Jarno
Import upstream version 2.9 |
294 |
/* Now we can construct the result string. It consists of three
|
295 |
parts. */
|
|
296 |
cp = __stpncpy (buffer, sha256_salt_prefix, MAX (0, buflen)); |
|
297 |
buflen -= sizeof (sha256_salt_prefix) - 1; |
|
298 |
||
299 |
if (rounds_custom) |
|
300 |
{
|
|
301 |
int n = snprintf (cp, MAX (0, buflen), "%s%zu$", |
|
302 |
sha256_rounds_prefix, rounds); |
|
303 |
cp += n; |
|
304 |
buflen -= n; |
|
305 |
}
|
|
306 |
||
307 |
cp = __stpncpy (cp, salt, MIN ((size_t) MAX (0, buflen), salt_len)); |
|
308 |
buflen -= MIN ((size_t) MAX (0, buflen), salt_len); |
|
309 |
||
310 |
if (buflen > 0) |
|
311 |
{
|
|
312 |
*cp++ = '$'; |
|
313 |
--buflen; |
|
314 |
}
|
|
315 |
||
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
316 |
void b64_from_24bit (unsigned int b2, unsigned int b1, unsigned int b0, |
317 |
int n) |
|
318 |
{
|
|
319 |
unsigned int w = (b2 << 16) | (b1 << 8) | b0; |
|
320 |
while (n-- > 0 && buflen > 0) |
|
321 |
{
|
|
322 |
*cp++ = b64t[w & 0x3f]; |
|
323 |
--buflen; |
|
324 |
w >>= 6; |
|
325 |
}
|
|
326 |
}
|
|
1
by Aurelien Jarno
Import upstream version 2.9 |
327 |
|
328 |
b64_from_24bit (alt_result[0], alt_result[10], alt_result[20], 4); |
|
329 |
b64_from_24bit (alt_result[21], alt_result[1], alt_result[11], 4); |
|
330 |
b64_from_24bit (alt_result[12], alt_result[22], alt_result[2], 4); |
|
331 |
b64_from_24bit (alt_result[3], alt_result[13], alt_result[23], 4); |
|
332 |
b64_from_24bit (alt_result[24], alt_result[4], alt_result[14], 4); |
|
333 |
b64_from_24bit (alt_result[15], alt_result[25], alt_result[5], 4); |
|
334 |
b64_from_24bit (alt_result[6], alt_result[16], alt_result[26], 4); |
|
335 |
b64_from_24bit (alt_result[27], alt_result[7], alt_result[17], 4); |
|
336 |
b64_from_24bit (alt_result[18], alt_result[28], alt_result[8], 4); |
|
337 |
b64_from_24bit (alt_result[9], alt_result[19], alt_result[29], 4); |
|
338 |
b64_from_24bit (0, alt_result[31], alt_result[30], 3); |
|
339 |
if (buflen <= 0) |
|
340 |
{
|
|
341 |
__set_errno (ERANGE); |
|
342 |
buffer = NULL; |
|
343 |
}
|
|
344 |
else
|
|
345 |
*cp = '\0'; /* Terminate the string. */ |
|
346 |
||
347 |
/* Clear the buffer for the intermediate result so that people
|
|
348 |
attaching to processes or reading core dumps cannot get any
|
|
349 |
information. We do it in this way to clear correct_words[]
|
|
350 |
inside the SHA256 implementation as well. */
|
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
351 |
#ifndef USE_NSS
|
1
by Aurelien Jarno
Import upstream version 2.9 |
352 |
__sha256_init_ctx (&ctx); |
353 |
__sha256_finish_ctx (&ctx, alt_result); |
|
1.1.2
by Matthias Klose
Import upstream version 2.10.1 |
354 |
memset (&ctx, '\0', sizeof (ctx)); |
355 |
memset (&alt_ctx, '\0', sizeof (alt_ctx)); |
|
356 |
#endif
|
|
1
by Aurelien Jarno
Import upstream version 2.9 |
357 |
memset (temp_result, '\0', sizeof (temp_result)); |
358 |
memset (p_bytes, '\0', key_len); |
|
359 |
memset (s_bytes, '\0', salt_len); |
|
360 |
if (copied_key != NULL) |
|
361 |
memset (copied_key, '\0', key_len); |
|
362 |
if (copied_salt != NULL) |
|
363 |
memset (copied_salt, '\0', salt_len); |
|
364 |
||
365 |
return buffer; |
|
366 |
}
|
|
367 |
||
368 |
#ifndef _LIBC
|
|
369 |
# define libc_freeres_ptr(decl) decl
|
|
370 |
#endif
|
|
371 |
libc_freeres_ptr (static char *buffer); |
|
372 |
||
373 |
/* This entry point is equivalent to the `crypt' function in Unix
|
|
374 |
libcs. */
|
|
375 |
char * |
|
376 |
__sha256_crypt (const char *key, const char *salt) |
|
377 |
{
|
|
378 |
/* We don't want to have an arbitrary limit in the size of the
|
|
379 |
password. We can compute an upper bound for the size of the
|
|
380 |
result in advance and so we can prepare the buffer we pass to
|
|
381 |
`sha256_crypt_r'. */
|
|
382 |
static int buflen; |
|
383 |
int needed = (sizeof (sha256_salt_prefix) - 1 |
|
384 |
+ sizeof (sha256_rounds_prefix) + 9 + 1 |
|
385 |
+ strlen (salt) + 1 + 43 + 1); |
|
386 |
||
387 |
if (buflen < needed) |
|
388 |
{
|
|
389 |
char *new_buffer = (char *) realloc (buffer, needed); |
|
390 |
if (new_buffer == NULL) |
|
391 |
return NULL; |
|
392 |
||
393 |
buffer = new_buffer; |
|
394 |
buflen = needed; |
|
395 |
}
|
|
396 |
||
397 |
return __sha256_crypt_r (key, salt, buffer, buflen); |
|
398 |
}
|
|
399 |
||
400 |
#ifndef _LIBC
|
|
401 |
static void |
|
402 |
__attribute__ ((__destructor__)) |
|
403 |
free_mem (void) |
|
404 |
{
|
|
405 |
free (buffer); |
|
406 |
}
|
|
407 |
#endif
|