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 unsigned char *OPENSSL_hexstr2buf(const char *str, long *len)
137 unsigned char *hexbuf, *q;
138 unsigned char ch, cl;
140 const unsigned char *p;
144 if ((hexbuf = OPENSSL_malloc(s >> 1)) == NULL) {
145 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, ERR_R_MALLOC_FAILURE);
148 for (p = (const unsigned char *)str, q = hexbuf; *p; ) {
154 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF,
155 CRYPTO_R_ODD_NUMBER_OF_DIGITS);
156 OPENSSL_free(hexbuf);
159 cli = OPENSSL_hexchar2int(cl);
160 chi = OPENSSL_hexchar2int(ch);
161 if (cli < 0 || chi < 0) {
162 OPENSSL_free(hexbuf);
163 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, CRYPTO_R_ILLEGAL_HEX_DIGIT);
166 *q++ = (unsigned char)((chi << 4) | cli);
175 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
176 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
177 * on EBCDIC machines)
179 char *OPENSSL_buf2hexstr(const unsigned char *buffer, long len)
181 static const char hexdig[] = "0123456789ABCDEF";
183 const unsigned char *p;
188 return OPENSSL_zalloc(1);
191 if ((tmp = OPENSSL_malloc(len * 3)) == NULL) {
192 CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR, ERR_R_MALLOC_FAILURE);
196 for (i = 0, p = buffer; i < len; i++, p++) {
197 *q++ = hexdig[(*p >> 4) & 0xf];
198 *q++ = hexdig[*p & 0xf];
202 #ifdef CHARSET_EBCDIC
203 ebcdic2ascii(tmp, tmp, q - tmp - 1);
209 int openssl_strerror_r(int errnum, char *buf, size_t buflen)
211 #if defined(_MSC_VER) && _MSC_VER>=1400
212 return !strerror_s(buf, buflen, errnum);
213 #elif defined(_GNU_SOURCE)
217 * GNU strerror_r may not actually set buf.
218 * It can return a pointer to some (immutable) static string in which case
219 * buf is left unused.
221 err = strerror_r(errnum, buf, buflen);
222 if (err == NULL || buflen == 0)
225 * If err is statically allocated, err != buf and we need to copy the data.
226 * If err points somewhere inside buf, OPENSSL_strlcpy can handle this,
227 * since src and dest are not annotated with __restrict and the function
228 * reads src byte for byte and writes to dest.
229 * If err == buf we do not have to copy anything.
232 OPENSSL_strlcpy(buf, err, buflen);
234 #elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \
235 (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600)
237 * We can use "real" strerror_r. The OpenSSL version differs in that it
238 * gives 1 on success and 0 on failure for consistency with other OpenSSL
239 * functions. Real strerror_r does it the other way around
241 return !strerror_r(errnum, buf, buflen);
245 /* Fall back to non-thread safe strerror()...its all we can do */
248 err = strerror(errnum);
249 /* Can this ever happen? */
252 OPENSSL_strlcpy(buf, err, buflen);