2 * Copyright 2003-2017 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
12 #include <openssl/crypto.h>
13 #include "internal/cryptlib.h"
14 #include "internal/o_str.h"
16 int OPENSSL_memcmp(const void *v1, const void *v2, size_t n)
18 const unsigned char *c1 = v1, *c2 = v2;
21 while (n && (ret = *c1 - *c2) == 0)
27 char *CRYPTO_strdup(const char *str, const char* file, int line)
34 size = strlen(str) + 1;
35 ret = CRYPTO_malloc(size, file, line);
37 memcpy(ret, str, size);
41 char *CRYPTO_strndup(const char *str, size_t s, const char* file, int line)
49 maxlen = OPENSSL_strnlen(str, s);
51 ret = CRYPTO_malloc(maxlen + 1, file, line);
53 memcpy(ret, str, maxlen);
59 void *CRYPTO_memdup(const void *data, size_t siz, const char* file, int line)
63 if (data == NULL || siz >= INT_MAX)
66 ret = CRYPTO_malloc(siz, file, line);
68 CRYPTOerr(CRYPTO_F_CRYPTO_MEMDUP, ERR_R_MALLOC_FAILURE);
71 return memcpy(ret, data, siz);
74 size_t OPENSSL_strnlen(const char *str, size_t maxlen)
78 for (p = str; maxlen-- != 0 && *p != '\0'; ++p) ;
83 size_t OPENSSL_strlcpy(char *dst, const char *src, size_t size)
86 for (; size > 1 && *src; size--) {
92 return l + strlen(src);
95 size_t OPENSSL_strlcat(char *dst, const char *src, size_t size)
98 for (; size > 0 && *dst; size--, dst++)
100 return l + OPENSSL_strlcpy(dst, src, size);
103 int OPENSSL_hexchar2int(unsigned char c)
105 #ifdef CHARSET_EBCDIC
147 * Give a string of hex digits convert to a buffer
149 unsigned char *OPENSSL_hexstr2buf(const char *str, long *len)
151 unsigned char *hexbuf, *q;
152 unsigned char ch, cl;
154 const unsigned char *p;
158 if ((hexbuf = OPENSSL_malloc(s >> 1)) == NULL) {
159 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, ERR_R_MALLOC_FAILURE);
162 for (p = (const unsigned char *)str, q = hexbuf; *p; ) {
168 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF,
169 CRYPTO_R_ODD_NUMBER_OF_DIGITS);
170 OPENSSL_free(hexbuf);
173 cli = OPENSSL_hexchar2int(cl);
174 chi = OPENSSL_hexchar2int(ch);
175 if (cli < 0 || chi < 0) {
176 OPENSSL_free(hexbuf);
177 CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, CRYPTO_R_ILLEGAL_HEX_DIGIT);
180 *q++ = (unsigned char)((chi << 4) | cli);
189 * Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
190 * hex representation @@@ (Contents of buffer are always kept in ASCII, also
191 * on EBCDIC machines)
193 char *OPENSSL_buf2hexstr(const unsigned char *buffer, long len)
195 static const char hexdig[] = "0123456789ABCDEF";
197 const unsigned char *p;
202 return OPENSSL_zalloc(1);
205 if ((tmp = OPENSSL_malloc(len * 3)) == NULL) {
206 CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR, ERR_R_MALLOC_FAILURE);
210 for (i = 0, p = buffer; i < len; i++, p++) {
211 *q++ = hexdig[(*p >> 4) & 0xf];
212 *q++ = hexdig[*p & 0xf];
216 #ifdef CHARSET_EBCDIC
217 ebcdic2ascii(tmp, tmp, q - tmp - 1);
223 int openssl_strerror_r(int errnum, char *buf, size_t buflen)
225 #if defined(_MSC_VER) && _MSC_VER>=1400
226 return !strerror_s(buf, buflen, errnum);
227 #elif defined(_GNU_SOURCE)
228 return strerror_r(errnum, buf, buflen) != NULL;
229 #elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \
230 (defined(_XOPEN_SOURCE) && _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';