2 * Copyright 2003-2020 The OpenSSL Project Authors. All Rights Reserved.
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
12 #include <openssl/crypto.h>
13 #include "internal/cryptlib.h"
15 #define DEFAULT_SEPARATOR ':'
18 char *CRYPTO_strdup(const char *str, const char* file, int line)
24 ret = CRYPTO_malloc(strlen(str) + 1, file, line);
30 char *CRYPTO_strndup(const char *str, size_t s, const char* file, int line)
38 maxlen = OPENSSL_strnlen(str, s);
40 ret = CRYPTO_malloc(maxlen + 1, file, line);
42 memcpy(ret, str, maxlen);
43 ret[maxlen] = CH_ZERO;
48 void *CRYPTO_memdup(const void *data, size_t siz, const char* file, int line)
52 if (data == NULL || siz >= INT_MAX)
55 ret = CRYPTO_malloc(siz, file, line);
57 CRYPTOerr(CRYPTO_F_CRYPTO_MEMDUP, ERR_R_MALLOC_FAILURE);
60 return memcpy(ret, data, siz);
63 size_t OPENSSL_strnlen(const char *str, size_t maxlen)
67 for (p = str; maxlen-- != 0 && *p != CH_ZERO; ++p) ;
72 size_t OPENSSL_strlcpy(char *dst, const char *src, size_t size)
75 for (; size > 1 && *src; size--) {
81 return l + strlen(src);
84 size_t OPENSSL_strlcat(char *dst, const char *src, size_t size)
87 for (; size > 0 && *dst; size--, dst++)
89 return l + OPENSSL_strlcpy(dst, src, size);
92 int OPENSSL_hexchar2int(unsigned char c)
135 static int hexstr2buf_sep(unsigned char *buf, size_t buf_n, size_t *buflen,
136 const char *str, const char sep)
139 unsigned char ch, cl;
141 const unsigned char *p;
144 for (p = (const unsigned char *)str, q = buf, cnt = 0; *p; ) {
146 /* A separator of CH_ZERO means there is no separator */
147 if (ch == sep && sep != CH_ZERO)
151 CRYPTOerr(0, CRYPTO_R_ODD_NUMBER_OF_DIGITS);
154 cli = OPENSSL_hexchar2int(cl);
155 chi = OPENSSL_hexchar2int(ch);
156 if (cli < 0 || chi < 0) {
157 CRYPTOerr(0, CRYPTO_R_ILLEGAL_HEX_DIGIT);
163 CRYPTOerr(0, CRYPTO_R_TOO_SMALL_BUFFER);
166 *q++ = (unsigned char)((chi << 4) | cli);
176 * Given a string of hex digits convert to a buffer
178 int OPENSSL_hexstr2buf_ex(unsigned char *buf, size_t buf_n, size_t *buflen,
181 return hexstr2buf_sep(buf, buf_n, buflen, str, DEFAULT_SEPARATOR);
184 unsigned char *openssl_hexstr2buf_sep(const char *str, long *buflen,
188 size_t buf_n, tmp_buflen;
190 buf_n = strlen(str) >> 1;
191 if ((buf = OPENSSL_malloc(buf_n)) == NULL) {
192 CRYPTOerr(0, ERR_R_MALLOC_FAILURE);
199 if (hexstr2buf_sep(buf, buf_n, &tmp_buflen, str, sep)) {
201 *buflen = (long)tmp_buflen;
208 unsigned char *OPENSSL_hexstr2buf(const char *str, long *buflen)
210 return openssl_hexstr2buf_sep(str, buflen, DEFAULT_SEPARATOR);
213 static int buf2hexstr_sep(char *str, size_t str_n, size_t *strlen,
214 const unsigned char *buf, size_t buflen,
217 static const char hexdig[] = "0123456789ABCDEF";
218 const unsigned char *p;
221 int has_sep = (sep != CH_ZERO);
222 size_t len = has_sep ? buflen * 3 : 1 + buflen * 2;
229 if (str_n < (unsigned long)len) {
230 CRYPTOerr(0, CRYPTO_R_TOO_SMALL_BUFFER);
235 for (i = 0, p = buf; i < buflen; i++, p++) {
236 *q++ = hexdig[(*p >> 4) & 0xf];
237 *q++ = hexdig[*p & 0xf];
245 #ifdef CHARSET_EBCDIC
246 ebcdic2ascii(str, str, q - str - 1);
251 int OPENSSL_buf2hexstr_ex(char *str, size_t str_n, size_t *strlen,
252 const unsigned char *buf, size_t buflen)
254 return buf2hexstr_sep(str, str_n, strlen, buf, buflen, DEFAULT_SEPARATOR);
257 char *openssl_buf2hexstr_sep(const unsigned char *buf, long buflen, char sep)
263 return OPENSSL_zalloc(1);
265 tmp_n = (sep != CH_ZERO) ? buflen * 3 : 1 + buflen * 2;
266 if ((tmp = OPENSSL_malloc(tmp_n)) == NULL) {
267 CRYPTOerr(0, ERR_R_MALLOC_FAILURE);
271 if (buf2hexstr_sep(tmp, tmp_n, NULL, buf, buflen, sep))
279 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
280 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
281 * on EBCDIC machines)
283 char *OPENSSL_buf2hexstr(const unsigned char *buf, long buflen)
285 return openssl_buf2hexstr_sep(buf, buflen, ':');
288 int openssl_strerror_r(int errnum, char *buf, size_t buflen)
290 #if defined(_MSC_VER) && _MSC_VER>=1400
291 return !strerror_s(buf, buflen, errnum);
292 #elif defined(_GNU_SOURCE)
296 * GNU strerror_r may not actually set buf.
297 * It can return a pointer to some (immutable) static string in which case
298 * buf is left unused.
300 err = strerror_r(errnum, buf, buflen);
301 if (err == NULL || buflen == 0)
304 * If err is statically allocated, err != buf and we need to copy the data.
305 * If err points somewhere inside buf, OPENSSL_strlcpy can handle this,
306 * since src and dest are not annotated with __restrict and the function
307 * reads src byte for byte and writes to dest.
308 * If err == buf we do not have to copy anything.
311 OPENSSL_strlcpy(buf, err, buflen);
313 #elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \
314 (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600)
316 * We can use "real" strerror_r. The OpenSSL version differs in that it
317 * gives 1 on success and 0 on failure for consistency with other OpenSSL
318 * functions. Real strerror_r does it the other way around
320 return !strerror_r(errnum, buf, buflen);
324 /* Fall back to non-thread safe strerror()...its all we can do */
327 err = strerror(errnum);
328 /* Can this ever happen? */
331 OPENSSL_strlcpy(buf, err, buflen);