2 * Copyright 2003-2016 The OpenSSL Project Authors. All Rights Reserved.
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
13 #include <openssl/crypto.h>
14 #include "internal/cryptlib.h"
15 #include "internal/o_str.h"
17 int OPENSSL_memcmp(const void *v1, const void *v2, size_t n)
19 const unsigned char *c1 = v1, *c2 = v2;
22 while (n && (ret = *c1 - *c2) == 0)
28 char *CRYPTO_strdup(const char *str, const char* file, int line)
35 size = strlen(str) + 1;
36 ret = CRYPTO_malloc(size, file, line);
38 memcpy(ret, str, size);
42 char *CRYPTO_strndup(const char *str, size_t s, const char* file, int line)
50 maxlen = OPENSSL_strnlen(str, s);
52 ret = CRYPTO_malloc(maxlen + 1, file, line);
54 memcpy(ret, str, maxlen);
60 void *CRYPTO_memdup(const void *data, size_t siz, const char* file, int line)
64 if (data == NULL || siz >= INT_MAX)
67 ret = CRYPTO_malloc(siz, file, line);
69 CRYPTOerr(CRYPTO_F_CRYPTO_MEMDUP, ERR_R_MALLOC_FAILURE);
72 return memcpy(ret, data, siz);
75 size_t OPENSSL_strnlen(const char *str, size_t maxlen)
79 for (p = str; maxlen-- != 0 && *p != '\0'; ++p) ;
84 size_t OPENSSL_strlcpy(char *dst, const char *src, size_t size)
87 for (; size > 1 && *src; size--) {
93 return l + strlen(src);
96 size_t OPENSSL_strlcat(char *dst, const char *src, size_t size)
99 for (; size > 0 && *dst; size--, dst++)
101 return l + OPENSSL_strlcpy(dst, src, size);
104 int OPENSSL_hexchar2int(unsigned char c)
106 #ifdef CHARSET_EBCDIC
148 * Give a string of hex digits convert to a buffer
150 unsigned char *OPENSSL_hexstr2buf(const char *str, long *len)
152 unsigned char *hexbuf, *q;
153 unsigned char ch, cl;
155 const unsigned char *p;
159 if ((hexbuf = OPENSSL_malloc(s >> 1)) == NULL) {
160 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, ERR_R_MALLOC_FAILURE);
163 for (p = (const unsigned char *)str, q = hexbuf; *p; ) {
169 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF,
170 CRYPTO_R_ODD_NUMBER_OF_DIGITS);
171 OPENSSL_free(hexbuf);
174 cli = OPENSSL_hexchar2int(cl);
175 chi = OPENSSL_hexchar2int(ch);
176 if (cli < 0 || chi < 0) {
177 OPENSSL_free(hexbuf);
178 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, CRYPTO_R_ILLEGAL_HEX_DIGIT);
181 *q++ = (unsigned char)((chi << 4) | cli);
190 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
191 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
192 * on EBCDIC machines)
194 char *OPENSSL_buf2hexstr(const unsigned char *buffer, long len)
196 const static char hexdig[] = "0123456789ABCDEF";
198 const unsigned char *p;
203 return OPENSSL_zalloc(1);
206 if ((tmp = OPENSSL_malloc(len * 3)) == NULL) {
207 CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR, ERR_R_MALLOC_FAILURE);
211 for (i = 0, p = buffer; i < len; i++, p++) {
212 *q++ = hexdig[(*p >> 4) & 0xf];
213 *q++ = hexdig[*p & 0xf];
217 #ifdef CHARSET_EBCDIC
218 ebcdic2ascii(tmp, tmp, q - tmp - 1);
224 int openssl_strerror_r(int errnum, char *buf, size_t buflen)
226 #if defined(_MSC_VER) && _MSC_VER>=1400
227 return !strerror_s(buf, buflen, errnum);
228 #elif defined(_GNU_SOURCE)
229 return strerror_r(errnum, buf, buflen) != NULL;
230 #elif (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
232 * We can use "real" strerror_r. The OpenSSL version differs in that it
233 * gives 1 on success and 0 on failure for consistency with other OpenSSL
234 * functions. Real strerror_r does it the other way around
236 return !strerror_r(errnum, buf, buflen);
239 /* Fall back to non-thread safe strerror()...its all we can do */
242 err = strerror(errnum);
243 /* Can this ever happen? */
246 strncpy(buf, err, buflen - 1);
247 buf[buflen - 1] = '\0';