2 * Copyright 2003-2017 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 char *CRYPTO_strdup(const char *str, const char* file, int line)
21 ret = CRYPTO_malloc(strlen(str) + 1, file, line);
27 char *CRYPTO_strndup(const char *str, size_t s, const char* file, int line)
35 maxlen = OPENSSL_strnlen(str, s);
37 ret = CRYPTO_malloc(maxlen + 1, file, line);
39 memcpy(ret, str, maxlen);
45 void *CRYPTO_memdup(const void *data, size_t siz, const char* file, int line)
49 if (data == NULL || siz >= INT_MAX)
52 ret = CRYPTO_malloc(siz, file, line);
54 CRYPTOerr(CRYPTO_F_CRYPTO_MEMDUP, ERR_R_MALLOC_FAILURE);
57 return memcpy(ret, data, siz);
60 size_t OPENSSL_strnlen(const char *str, size_t maxlen)
64 for (p = str; maxlen-- != 0 && *p != '\0'; ++p) ;
69 size_t OPENSSL_strlcpy(char *dst, const char *src, size_t size)
72 for (; size > 1 && *src; size--) {
78 return l + strlen(src);
81 size_t OPENSSL_strlcat(char *dst, const char *src, size_t size)
84 for (; size > 0 && *dst; size--, dst++)
86 return l + OPENSSL_strlcpy(dst, src, size);
89 int OPENSSL_hexchar2int(unsigned char c)
133 * Give a string of hex digits convert to a buffer
135 int OPENSSL_hexstr2buf_ex(unsigned char *buf, size_t buf_n, size_t *buflen,
139 unsigned char ch, cl;
141 const unsigned char *p;
144 for (p = (const unsigned char *)str, q = buf, cnt = 0; *p; ) {
150 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF_EX,
151 CRYPTO_R_ODD_NUMBER_OF_DIGITS);
154 cli = OPENSSL_hexchar2int(cl);
155 chi = OPENSSL_hexchar2int(ch);
156 if (cli < 0 || chi < 0) {
157 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF_EX,
158 CRYPTO_R_ILLEGAL_HEX_DIGIT);
164 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF_EX,
165 CRYPTO_R_TOO_SMALL_BUFFER);
168 *q++ = (unsigned char)((chi << 4) | cli);
177 unsigned char *OPENSSL_hexstr2buf(const char *str, long *buflen)
180 size_t buf_n, tmp_buflen;
182 buf_n = strlen(str) >> 1;
183 if ((buf = OPENSSL_malloc(buf_n)) == NULL) {
184 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, ERR_R_MALLOC_FAILURE);
191 if (OPENSSL_hexstr2buf_ex(buf, buf_n, &tmp_buflen, str)) {
193 *buflen = (long)tmp_buflen;
200 int OPENSSL_buf2hexstr_ex(char *str, size_t str_n, size_t *strlen,
201 const unsigned char *buf, size_t buflen)
203 static const char hexdig[] = "0123456789ABCDEF";
204 const unsigned char *p;
209 *strlen = buflen * 3;
213 if (str_n < (unsigned long)buflen * 3) {
214 CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR_EX, CRYPTO_R_TOO_SMALL_BUFFER);
219 for (i = 0, p = buf; i < buflen; i++, p++) {
220 *q++ = hexdig[(*p >> 4) & 0xf];
221 *q++ = hexdig[*p & 0xf];
225 #ifdef CHARSET_EBCDIC
226 ebcdic2ascii(str, str, q - str - 1);
232 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
233 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
234 * on EBCDIC machines)
236 char *OPENSSL_buf2hexstr(const unsigned char *buf, long buflen)
242 return OPENSSL_zalloc(1);
245 if ((tmp = OPENSSL_malloc(tmp_n)) == NULL) {
246 CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR, ERR_R_MALLOC_FAILURE);
250 if (OPENSSL_buf2hexstr_ex(tmp, tmp_n, NULL, buf, buflen))
256 int openssl_strerror_r(int errnum, char *buf, size_t buflen)
258 #if defined(_MSC_VER) && _MSC_VER>=1400
259 return !strerror_s(buf, buflen, errnum);
260 #elif defined(_GNU_SOURCE)
264 * GNU strerror_r may not actually set buf.
265 * It can return a pointer to some (immutable) static string in which case
266 * buf is left unused.
268 err = strerror_r(errnum, buf, buflen);
269 if (err == NULL || buflen == 0)
272 * If err is statically allocated, err != buf and we need to copy the data.
273 * If err points somewhere inside buf, OPENSSL_strlcpy can handle this,
274 * since src and dest are not annotated with __restrict and the function
275 * reads src byte for byte and writes to dest.
276 * If err == buf we do not have to copy anything.
279 OPENSSL_strlcpy(buf, err, buflen);
281 #elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \
282 (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600)
284 * We can use "real" strerror_r. The OpenSSL version differs in that it
285 * gives 1 on success and 0 on failure for consistency with other OpenSSL
286 * functions. Real strerror_r does it the other way around
288 return !strerror_r(errnum, buf, buflen);
292 /* Fall back to non-thread safe strerror()...its all we can do */
295 err = strerror(errnum);
296 /* Can this ever happen? */
299 OPENSSL_strlcpy(buf, err, buflen);