OpenCoverage

randfile.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/openssl/src/crypto/rand/randfile.c
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1/*-
2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.-
3 *-
4 * Licensed under the OpenSSL license (the "License"). You may not use-
5 * this file except in compliance with the License. You can obtain a copy-
6 * in the file LICENSE in the source distribution or at-
7 * https://www.openssl.org/source/license.html-
8 */-
9-
10#include "internal/cryptlib.h"-
11-
12#include <errno.h>-
13#include <stdio.h>-
14#include <stdlib.h>-
15#include <string.h>-
16-
17#include <openssl/crypto.h>-
18#include <openssl/rand.h>-
19#include <openssl/buffer.h>-
20-
21#ifdef OPENSSL_SYS_VMS-
22# include <unixio.h>-
23#endif-
24#include <sys/types.h>-
25#ifndef OPENSSL_NO_POSIX_IO-
26# include <sys/stat.h>-
27# include <fcntl.h>-
28# ifdef _WIN32-
29# include <windows.h>-
30# include <io.h>-
31# define stat _stat-
32# define chmod _chmod-
33# define open _open-
34# define fdopen _fdopen-
35# define fstat _fstat-
36# define fileno _fileno-
37# endif-
38#endif-
39-
40/*-
41 * Following should not be needed, and we could have been stricter-
42 * and demand S_IS*. But some systems just don't comply... Formally-
43 * below macros are "anatomically incorrect", because normally they-
44 * would look like ((m) & MASK == TYPE), but since MASK availability-
45 * is as questionable, we settle for this poor-man fallback...-
46 */-
47# if !defined(S_ISREG)-
48# define S_ISREG(m) ((m) & S_IFREG)-
49# endif-
50-
51#define RAND_FILE_SIZE 1024-
52#define RFILE ".rnd"-
53-
54#ifdef OPENSSL_SYS_VMS-
55/*-
56 * __FILE_ptr32 is a type provided by DEC C headers (types.h specifically)-
57 * to make sure the FILE* is a 32-bit pointer no matter what. We know that-
58 * stdio functions return this type (a study of stdio.h proves it).-
59 *-
60 * This declaration is a nasty hack to get around vms' extension to fopen for-
61 * passing in sharing options being disabled by /STANDARD=ANSI89-
62 */-
63static __FILE_ptr32 (*const vms_fopen)(const char *, const char *, ...) =-
64 (__FILE_ptr32 (*)(const char *, const char *, ...))fopen;-
65# define VMS_OPEN_ATTRS \-
66 "shr=get,put,upd,del","ctx=bin,stm","rfm=stm","rat=none","mrs=0"-
67# define openssl_fopen(fname, mode) vms_fopen((fname), (mode), VMS_OPEN_ATTRS)-
68#endif-
69-
70/*-
71 * Note that these functions are intended for seed files only. Entropy-
72 * devices and EGD sockets are handled in rand_unix.c If |bytes| is-
73 * -1 read the complete file; otherwise read the specified amount.-
74 */-
75int RAND_load_file(const char *file, long bytes)-
76{-
77 unsigned char buf[RAND_FILE_SIZE];-
78#ifndef OPENSSL_NO_POSIX_IO-
79 struct stat sb;-
80#endif-
81 int i, n, ret = 0;-
82 FILE *in;-
83-
84 if (bytes == 0)
bytes == 0Description
TRUEnever evaluated
FALSEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-12
85 return 0;
never executed: return 0;
0
86-
87 if ((in = openssl_fopen(file, "rb")) == NULL) {
(in = openssl_...== ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-12
88 RANDerr(RAND_F_RAND_LOAD_FILE, RAND_R_CANNOT_OPEN_FILE);-
89 ERR_add_error_data(2, "Filename=", file);-
90 return -1;
never executed: return -1;
0
91 }-
92-
93#ifndef OPENSSL_NO_POSIX_IO-
94 if (fstat(fileno(in), &sb) < 0) {
fstat(fileno(in), &sb) < 0Description
TRUEnever evaluated
FALSEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-12
95 RANDerr(RAND_F_RAND_LOAD_FILE, RAND_R_INTERNAL_ERROR);-
96 ERR_add_error_data(2, "Filename=", file);-
97 fclose(in);-
98 return -1;
never executed: return -1;
0
99 }-
100-
101 if (!S_ISREG(sb.st_mode) && bytes < 0)
! (((( sb.st_m... == (0100000))Description
TRUEnever evaluated
FALSEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
bytes < 0Description
TRUEnever evaluated
FALSEnever evaluated
0-12
102 bytes = 256;
never executed: bytes = 256;
0
103#endif-
104 /*-
105 * On VMS, setbuf() will only take 32-bit pointers, and a compilation-
106 * with /POINTER_SIZE=64 will give off a MAYLOSEDATA2 warning here.-
107 * However, we trust that the C RTL will never give us a FILE pointer-
108 * above the first 4 GB of memory, so we simply turn off the warning-
109 * temporarily.-
110 */-
111#if defined(OPENSSL_SYS_VMS) && defined(__DECC)-
112# pragma environment save-
113# pragma message disable maylosedata2-
114#endif-
115 /*-
116 * Don't buffer, because even if |file| is regular file, we have-
117 * no control over the buffer, so why would we want a copy of its-
118 * contents lying around?-
119 */-
120 setbuf(in, NULL);-
121#if defined(OPENSSL_SYS_VMS) && defined(__DECC)-
122# pragma environment restore-
123#endif-
124-
125 for ( ; ; ) {-
126 if (bytes > 0)
bytes > 0Description
TRUEnever evaluated
FALSEevaluated 30 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-30
127 n = (bytes < RAND_FILE_SIZE) ? (int)bytes : RAND_FILE_SIZE;
never executed: n = (bytes < 1024) ? (int)bytes : 1024;
(bytes < 1024)Description
TRUEnever evaluated
FALSEnever evaluated
0
128 else-
129 n = RAND_FILE_SIZE;
executed 30 times by 1 test: n = 1024;
Executed by:
  • libcrypto.so.1.1
30
130 i = fread(buf, 1, n, in);-
131#ifdef EINTR-
132 if (ferror(in) && errno == EINTR){
ferror(in)Description
TRUEnever evaluated
FALSEevaluated 30 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
(*__errno_location ()) == 4Description
TRUEnever evaluated
FALSEnever evaluated
0-30
133 clearerr(in);-
134 if (i == 0)
i == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
135 continue;
never executed: continue;
0
136 }
never executed: end of block
0
137#endif-
138 if (i == 0)
i == 0Description
TRUEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEevaluated 18 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
12-18
139 break;
executed 12 times by 1 test: break;
Executed by:
  • libcrypto.so.1.1
12
140-
141 RAND_add(buf, i, (double)i);-
142 ret += i;-
143-
144 /* If given a bytecount, and we did it, break. */-
145 if (bytes > 0 && (bytes -= i) <= 0)
bytes > 0Description
TRUEnever evaluated
FALSEevaluated 18 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
(bytes -= i) <= 0Description
TRUEnever evaluated
FALSEnever evaluated
0-18
146 break;
never executed: break;
0
147 }
executed 18 times by 1 test: end of block
Executed by:
  • libcrypto.so.1.1
18
148-
149 OPENSSL_cleanse(buf, sizeof(buf));-
150 fclose(in);-
151 return ret;
executed 12 times by 1 test: return ret;
Executed by:
  • libcrypto.so.1.1
12
152}-
153-
154int RAND_write_file(const char *file)-
155{-
156 unsigned char buf[RAND_FILE_SIZE];-
157 int ret = -1;-
158 FILE *out = NULL;-
159#ifndef OPENSSL_NO_POSIX_IO-
160 struct stat sb;-
161-
162 if (stat(file, &sb) >= 0 && !S_ISREG(sb.st_mode)) {
stat(file, &sb) >= 0Description
TRUEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEnever evaluated
! (((( sb.st_m... == (0100000))Description
TRUEnever evaluated
FALSEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-12
163 RANDerr(RAND_F_RAND_WRITE_FILE, RAND_R_NOT_A_REGULAR_FILE);-
164 ERR_add_error_data(2, "Filename=", file);-
165 return -1;
never executed: return -1;
0
166 }-
167#endif-
168-
169 /* Collect enough random data. */-
170 if (RAND_priv_bytes(buf, (int)sizeof(buf)) != 1)
RAND_priv_byte...eof(buf)) != 1Description
TRUEnever evaluated
FALSEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-12
171 return -1;
never executed: return -1;
0
172-
173#if defined(O_CREAT) && !defined(OPENSSL_NO_POSIX_IO) && \-
174 !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_WINDOWS)-
175 {-
176# ifndef O_BINARY-
177# define O_BINARY 0-
178# endif-
179 /*-
180 * chmod(..., 0600) is too late to protect the file, permissions-
181 * should be restrictive from the start-
182 */-
183 int fd = open(file, O_WRONLY | O_CREAT | O_BINARY, 0600);-
184 if (fd != -1)
fd != -1Description
TRUEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
FALSEnever evaluated
0-12
185 out = fdopen(fd, "wb");
executed 12 times by 1 test: out = fdopen(fd, "wb");
Executed by:
  • libcrypto.so.1.1
12
186 }-
187#endif-
188-
189#ifdef OPENSSL_SYS_VMS-
190 /*-
191 * VMS NOTE: Prior versions of this routine created a _new_ version of-
192 * the rand file for each call into this routine, then deleted all-
193 * existing versions named ;-1, and finally renamed the current version-
194 * as ';1'. Under concurrent usage, this resulted in an RMS race-
195 * condition in rename() which could orphan files (see vms message help-
196 * for RMS$_REENT). With the fopen() calls below, openssl/VMS now shares-
197 * the top-level version of the rand file. Note that there may still be-
198 * conditions where the top-level rand file is locked. If so, this code-
199 * will then create a new version of the rand file. Without the delete-
200 * and rename code, this can result in ascending file versions that stop-
201 * at version 32767, and this routine will then return an error. The-
202 * remedy for this is to recode the calling application to avoid-
203 * concurrent use of the rand file, or synchronize usage at the-
204 * application level. Also consider whether or not you NEED a persistent-
205 * rand file in a concurrent use situation.-
206 */-
207 out = openssl_fopen(file, "rb+");-
208#endif-
209-
210 if (out == NULL)
out == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-12
211 out = openssl_fopen(file, "wb");
never executed: out = openssl_fopen(file, "wb");
0
212 if (out == NULL) {
out == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 12 times by 1 test
Evaluated by:
  • libcrypto.so.1.1
0-12
213 RANDerr(RAND_F_RAND_WRITE_FILE, RAND_R_CANNOT_OPEN_FILE);-
214 ERR_add_error_data(2, "Filename=", file);-
215 return -1;
never executed: return -1;
0
216 }-
217-
218#if !defined(NO_CHMOD) && !defined(OPENSSL_NO_POSIX_IO)-
219 /*-
220 * Yes it's late to do this (see above comment), but better than nothing.-
221 */-
222 chmod(file, 0600);-
223#endif-
224-
225 ret = fwrite(buf, 1, RAND_FILE_SIZE, out);-
226 fclose(out);-
227 OPENSSL_cleanse(buf, RAND_FILE_SIZE);-
228 return ret;
executed 12 times by 1 test: return ret;
Executed by:
  • libcrypto.so.1.1
12
229}-
230-
231const char *RAND_file_name(char *buf, size_t size)-
232{-
233 char *s = NULL;-
234 size_t len;-
235 int use_randfile = 1;-
236-
237#if defined(_WIN32) && defined(CP_UTF8)-
238 DWORD envlen;-
239 WCHAR *var;-
240-
241 /* Look up various environment variables. */-
242 if ((envlen = GetEnvironmentVariableW(var = L"RANDFILE", NULL, 0)) == 0) {-
243 use_randfile = 0;-
244 if ((envlen = GetEnvironmentVariableW(var = L"HOME", NULL, 0)) == 0-
245 && (envlen = GetEnvironmentVariableW(var = L"USERPROFILE",-
246 NULL, 0)) == 0)-
247 envlen = GetEnvironmentVariableW(var = L"SYSTEMROOT", NULL, 0);-
248 }-
249-
250 /* If we got a value, allocate space to hold it and then get it. */-
251 if (envlen != 0) {-
252 int sz;-
253 WCHAR *val = _alloca(envlen * sizeof(WCHAR));-
254-
255 if (GetEnvironmentVariableW(var, val, envlen) < envlen-
256 && (sz = WideCharToMultiByte(CP_UTF8, 0, val, -1, NULL, 0,-
257 NULL, NULL)) != 0) {-
258 s = _alloca(sz);-
259 if (WideCharToMultiByte(CP_UTF8, 0, val, -1, s, sz,-
260 NULL, NULL) == 0)-
261 s = NULL;-
262 }-
263 }-
264#else-
265 if (OPENSSL_issetugid() != 0) {
OPENSSL_issetugid() != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
266 use_randfile = 0;-
267 } else if ((s = getenv("RANDFILE")) == NULL || *s == '\0') {
never executed: end of block
(s = getenv("R...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
*s == '\0'Description
TRUEnever evaluated
FALSEnever evaluated
0
268 use_randfile = 0;-
269 s = getenv("HOME");-
270 }
never executed: end of block
0
271#endif-
272-
273#ifdef DEFAULT_HOME-
274 if (!use_randfile && s == NULL)-
275 s = DEFAULT_HOME;-
276#endif-
277 if (s == NULL || *s == '\0')
s == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
*s == '\0'Description
TRUEnever evaluated
FALSEnever evaluated
0
278 return NULL;
never executed: return ((void *)0) ;
0
279-
280 len = strlen(s);-
281 if (use_randfile) {
use_randfileDescription
TRUEnever evaluated
FALSEnever evaluated
0
282 if (len + 1 >= size)
len + 1 >= sizeDescription
TRUEnever evaluated
FALSEnever evaluated
0
283 return NULL;
never executed: return ((void *)0) ;
0
284 strcpy(buf, s);-
285 } else {
never executed: end of block
0
286 if (len + 1 + strlen(RFILE) + 1 >= size)
len + 1 + strl...") + 1 >= sizeDescription
TRUEnever evaluated
FALSEnever evaluated
0
287 return NULL;
never executed: return ((void *)0) ;
0
288 strcpy(buf, s);-
289#ifndef OPENSSL_SYS_VMS-
290 strcat(buf, "/");-
291#endif-
292 strcat(buf, RFILE);-
293 }
never executed: end of block
0
294-
295 return buf;
never executed: return buf;
0
296}-
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