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source: vbox/trunk/src/libs/openssl-3.0.3/crypto/o_str.c@ 96662

Last change on this file since 96662 was 94404, checked in by vboxsync, 3 years ago

libs/openssl: Update to 3.0.2 and switch to it, bugref:10128
File size: 8.4 KB
Line 
1/*
2 * Copyright 2003-2022 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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 "e_os.h"
11#include <limits.h>
12#include <openssl/crypto.h>
13#include "internal/cryptlib.h"
14
15#define DEFAULT_SEPARATOR ':'
16#define CH_ZERO '\0'
17
18char *CRYPTO_strdup(const char *str, const char* file, int line)
19{
20 char *ret;
21
22 if (str == NULL)
23 return NULL;
24 ret = CRYPTO_malloc(strlen(str) + 1, file, line);
25 if (ret != NULL)
26 strcpy(ret, str);
27 return ret;
28}
29
30char *CRYPTO_strndup(const char *str, size_t s, const char* file, int line)
31{
32 size_t maxlen;
33 char *ret;
34
35 if (str == NULL)
36 return NULL;
37
38 maxlen = OPENSSL_strnlen(str, s);
39
40 ret = CRYPTO_malloc(maxlen + 1, file, line);
41 if (ret) {
42 memcpy(ret, str, maxlen);
43 ret[maxlen] = CH_ZERO;
44 }
45 return ret;
46}
47
48void *CRYPTO_memdup(const void *data, size_t siz, const char* file, int line)
49{
50 void *ret;
51
52 if (data == NULL || siz >= INT_MAX)
53 return NULL;
54
55 ret = CRYPTO_malloc(siz, file, line);
56 if (ret == NULL) {
57 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
58 return NULL;
59 }
60 return memcpy(ret, data, siz);
61}
62
63size_t OPENSSL_strnlen(const char *str, size_t maxlen)
64{
65 const char *p;
66
67 for (p = str; maxlen-- != 0 && *p != CH_ZERO; ++p) ;
68
69 return p - str;
70}
71
72size_t OPENSSL_strlcpy(char *dst, const char *src, size_t size)
73{
74 size_t l = 0;
75 for (; size > 1 && *src; size--) {
76 *dst++ = *src++;
77 l++;
78 }
79 if (size)
80 *dst = CH_ZERO;
81 return l + strlen(src);
82}
83
84size_t OPENSSL_strlcat(char *dst, const char *src, size_t size)
85{
86 size_t l = 0;
87 for (; size > 0 && *dst; size--, dst++)
88 l++;
89 return l + OPENSSL_strlcpy(dst, src, size);
90}
91
92int OPENSSL_hexchar2int(unsigned char c)
93{
94#ifdef CHARSET_EBCDIC
95 c = os_toebcdic[c];
96#endif
97
98 switch (c) {
99 case '0':
100 return 0;
101 case '1':
102 return 1;
103 case '2':
104 return 2;
105 case '3':
106 return 3;
107 case '4':
108 return 4;
109 case '5':
110 return 5;
111 case '6':
112 return 6;
113 case '7':
114 return 7;
115 case '8':
116 return 8;
117 case '9':
118 return 9;
119 case 'a': case 'A':
120 return 0x0A;
121 case 'b': case 'B':
122 return 0x0B;
123 case 'c': case 'C':
124 return 0x0C;
125 case 'd': case 'D':
126 return 0x0D;
127 case 'e': case 'E':
128 return 0x0E;
129 case 'f': case 'F':
130 return 0x0F;
131 }
132 return -1;
133}
134
135static int hexstr2buf_sep(unsigned char *buf, size_t buf_n, size_t *buflen,
136 const char *str, const char sep)
137{
138 unsigned char *q;
139 unsigned char ch, cl;
140 int chi, cli;
141 const unsigned char *p;
142 size_t cnt;
143
144 for (p = (const unsigned char *)str, q = buf, cnt = 0; *p; ) {
145 ch = *p++;
146 /* A separator of CH_ZERO means there is no separator */
147 if (ch == sep && sep != CH_ZERO)
148 continue;
149 cl = *p++;
150 if (!cl) {
151 ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_ODD_NUMBER_OF_DIGITS);
152 return 0;
153 }
154 cli = OPENSSL_hexchar2int(cl);
155 chi = OPENSSL_hexchar2int(ch);
156 if (cli < 0 || chi < 0) {
157 ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_ILLEGAL_HEX_DIGIT);
158 return 0;
159 }
160 cnt++;
161 if (q != NULL) {
162 if (cnt > buf_n) {
163 ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_SMALL_BUFFER);
164 return 0;
165 }
166 *q++ = (unsigned char)((chi << 4) | cli);
167 }
168 }
169
170 if (buflen != NULL)
171 *buflen = cnt;
172 return 1;
173}
174
175/*
176 * Given a string of hex digits convert to a buffer
177 */
178int OPENSSL_hexstr2buf_ex(unsigned char *buf, size_t buf_n, size_t *buflen,
179 const char *str, const char sep)
180{
181 return hexstr2buf_sep(buf, buf_n, buflen, str, sep);
182}
183
184unsigned char *ossl_hexstr2buf_sep(const char *str, long *buflen,
185 const char sep)
186{
187 unsigned char *buf;
188 size_t buf_n, tmp_buflen;
189
190 buf_n = strlen(str);
191 if (buf_n <= 1) {
192 ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_HEX_STRING_TOO_SHORT);
193 return NULL;
194 }
195 buf_n /= 2;
196 if ((buf = OPENSSL_malloc(buf_n)) == NULL) {
197 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
198 return NULL;
199 }
200
201 if (buflen != NULL)
202 *buflen = 0;
203 tmp_buflen = 0;
204 if (hexstr2buf_sep(buf, buf_n, &tmp_buflen, str, sep)) {
205 if (buflen != NULL)
206 *buflen = (long)tmp_buflen;
207 return buf;
208 }
209 OPENSSL_free(buf);
210 return NULL;
211}
212
213unsigned char *OPENSSL_hexstr2buf(const char *str, long *buflen)
214{
215 return ossl_hexstr2buf_sep(str, buflen, DEFAULT_SEPARATOR);
216}
217
218static int buf2hexstr_sep(char *str, size_t str_n, size_t *strlength,
219 const unsigned char *buf, size_t buflen,
220 const char sep)
221{
222 static const char hexdig[] = "0123456789ABCDEF";
223 const unsigned char *p;
224 char *q;
225 size_t i;
226 int has_sep = (sep != CH_ZERO);
227 size_t len = has_sep ? buflen * 3 : 1 + buflen * 2;
228
229 if (strlength != NULL)
230 *strlength = len;
231 if (str == NULL)
232 return 1;
233
234 if (str_n < (unsigned long)len) {
235 ERR_raise(ERR_LIB_CRYPTO, CRYPTO_R_TOO_SMALL_BUFFER);
236 return 0;
237 }
238
239 q = str;
240 for (i = 0, p = buf; i < buflen; i++, p++) {
241 *q++ = hexdig[(*p >> 4) & 0xf];
242 *q++ = hexdig[*p & 0xf];
243 if (has_sep)
244 *q++ = sep;
245 }
246 if (has_sep)
247 --q;
248 *q = CH_ZERO;
249
250#ifdef CHARSET_EBCDIC
251 ebcdic2ascii(str, str, q - str - 1);
252#endif
253 return 1;
254}
255
256int OPENSSL_buf2hexstr_ex(char *str, size_t str_n, size_t *strlength,
257 const unsigned char *buf, size_t buflen,
258 const char sep)
259{
260 return buf2hexstr_sep(str, str_n, strlength, buf, buflen, sep);
261}
262
263char *ossl_buf2hexstr_sep(const unsigned char *buf, long buflen, char sep)
264{
265 char *tmp;
266 size_t tmp_n;
267
268 if (buflen == 0)
269 return OPENSSL_zalloc(1);
270
271 tmp_n = (sep != CH_ZERO) ? buflen * 3 : 1 + buflen * 2;
272 if ((tmp = OPENSSL_malloc(tmp_n)) == NULL) {
273 ERR_raise(ERR_LIB_CRYPTO, ERR_R_MALLOC_FAILURE);
274 return NULL;
275 }
276
277 if (buf2hexstr_sep(tmp, tmp_n, NULL, buf, buflen, sep))
278 return tmp;
279 OPENSSL_free(tmp);
280 return NULL;
281}
282
283
284/*
285 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
286 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
287 * on EBCDIC machines)
288 */
289char *OPENSSL_buf2hexstr(const unsigned char *buf, long buflen)
290{
291 return ossl_buf2hexstr_sep(buf, buflen, ':');
292}
293
294int openssl_strerror_r(int errnum, char *buf, size_t buflen)
295{
296#if defined(_MSC_VER) && _MSC_VER>=1400 && !defined(_WIN32_WCE)
297 return !strerror_s(buf, buflen, errnum);
298#elif defined(_GNU_SOURCE)
299 char *err;
300
301 /*
302 * GNU strerror_r may not actually set buf.
303 * It can return a pointer to some (immutable) static string in which case
304 * buf is left unused.
305 */
306 err = strerror_r(errnum, buf, buflen);
307 if (err == NULL || buflen == 0)
308 return 0;
309 /*
310 * If err is statically allocated, err != buf and we need to copy the data.
311 * If err points somewhere inside buf, OPENSSL_strlcpy can handle this,
312 * since src and dest are not annotated with __restrict and the function
313 * reads src byte for byte and writes to dest.
314 * If err == buf we do not have to copy anything.
315 */
316 if (err != buf)
317 OPENSSL_strlcpy(buf, err, buflen);
318 return 1;
319#elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \
320 (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600)
321 /*
322 * We can use "real" strerror_r. The OpenSSL version differs in that it
323 * gives 1 on success and 0 on failure for consistency with other OpenSSL
324 * functions. Real strerror_r does it the other way around
325 */
326 return !strerror_r(errnum, buf, buflen);
327#else
328 char *err;
329
330 /* Fall back to non-thread safe strerror()...its all we can do */
331 if (buflen < 2)
332 return 0;
333 err = strerror(errnum);
334 /* Can this ever happen? */
335 if (err == NULL)
336 return 0;
337 OPENSSL_strlcpy(buf, err, buflen);
338 return 1;
339#endif
340}
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