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/*
* Copyright 2003-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "e_os.h"
#include <limits.h>
#include <openssl/crypto.h>
#include "internal/cryptlib.h"
#include "internal/o_str.h"
int OPENSSL_memcmp(const void *v1, const void *v2, size_t n)
{
const unsigned char *c1 = v1, *c2 = v2;
int ret = 0;
while (n && (ret = *c1 - *c2) == 0)
n--, c1++, c2++;
return ret;
}
char *CRYPTO_strdup(const char *str, const char* file, int line)
{
char *ret;
if (str == NULL)
return NULL;
ret = CRYPTO_malloc(strlen(str) + 1, file, line);
if (ret != NULL)
strcpy(ret, str);
return ret;
}
char *CRYPTO_strndup(const char *str, size_t s, const char* file, int line)
{
size_t maxlen;
char *ret;
if (str == NULL)
return NULL;
maxlen = OPENSSL_strnlen(str, s);
ret = CRYPTO_malloc(maxlen + 1, file, line);
if (ret) {
memcpy(ret, str, maxlen);
ret[maxlen] = '\0';
}
return ret;
}
void *CRYPTO_memdup(const void *data, size_t siz, const char* file, int line)
{
void *ret;
if (data == NULL || siz >= INT_MAX)
return NULL;
ret = CRYPTO_malloc(siz, file, line);
if (ret == NULL) {
CRYPTOerr(CRYPTO_F_CRYPTO_MEMDUP, ERR_R_MALLOC_FAILURE);
return NULL;
}
return memcpy(ret, data, siz);
}
size_t OPENSSL_strnlen(const char *str, size_t maxlen)
{
const char *p;
for (p = str; maxlen-- != 0 && *p != '\0'; ++p) ;
return p - str;
}
size_t OPENSSL_strlcpy(char *dst, const char *src, size_t size)
{
size_t l = 0;
for (; size > 1 && *src; size--) {
*dst++ = *src++;
l++;
}
if (size)
*dst = '\0';
return l + strlen(src);
}
size_t OPENSSL_strlcat(char *dst, const char *src, size_t size)
{
size_t l = 0;
for (; size > 0 && *dst; size--, dst++)
l++;
return l + OPENSSL_strlcpy(dst, src, size);
}
int OPENSSL_hexchar2int(unsigned char c)
{
#ifdef CHARSET_EBCDIC
c = os_toebcdic[c];
#endif
switch (c) {
case '0':
return 0;
case '1':
return 1;
case '2':
return 2;
case '3':
return 3;
case '4':
return 4;
case '5':
return 5;
case '6':
return 6;
case '7':
return 7;
case '8':
return 8;
case '9':
return 9;
case 'a': case 'A':
return 0x0A;
case 'b': case 'B':
return 0x0B;
case 'c': case 'C':
return 0x0C;
case 'd': case 'D':
return 0x0D;
case 'e': case 'E':
return 0x0E;
case 'f': case 'F':
return 0x0F;
}
return -1;
}
/*
* Give a string of hex digits convert to a buffer
*/
unsigned char *OPENSSL_hexstr2buf(const char *str, long *len)
{
unsigned char *hexbuf, *q;
unsigned char ch, cl;
int chi, cli;
const unsigned char *p;
size_t s;
s = strlen(str);
if ((hexbuf = OPENSSL_malloc(s >> 1)) == NULL) {
CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, ERR_R_MALLOC_FAILURE);
return NULL;
}
for (p = (const unsigned char *)str, q = hexbuf; *p; ) {
ch = *p++;
if (ch == ':')
continue;
cl = *p++;
if (!cl) {
CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF,
CRYPTO_R_ODD_NUMBER_OF_DIGITS);
OPENSSL_free(hexbuf);
return NULL;
}
cli = OPENSSL_hexchar2int(cl);
chi = OPENSSL_hexchar2int(ch);
if (cli < 0 || chi < 0) {
OPENSSL_free(hexbuf);
CRYPTOerr(CRYPTO_F_OPENSSL_HEXSTR2BUF, CRYPTO_R_ILLEGAL_HEX_DIGIT);
return NULL;
}
*q++ = (unsigned char)((chi << 4) | cli);
}
if (len)
*len = q - hexbuf;
return hexbuf;
}
/*
* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
* hex representation @@@ (Contents of buffer are always kept in ASCII, also
* on EBCDIC machines)
*/
char *OPENSSL_buf2hexstr(const unsigned char *buffer, long len)
{
static const char hexdig[] = "0123456789ABCDEF";
char *tmp, *q;
const unsigned char *p;
int i;
if (len == 0)
{
return OPENSSL_zalloc(1);
}
if ((tmp = OPENSSL_malloc(len * 3)) == NULL) {
CRYPTOerr(CRYPTO_F_OPENSSL_BUF2HEXSTR, ERR_R_MALLOC_FAILURE);
return NULL;
}
q = tmp;
for (i = 0, p = buffer; i < len; i++, p++) {
*q++ = hexdig[(*p >> 4) & 0xf];
*q++ = hexdig[*p & 0xf];
*q++ = ':';
}
q[-1] = 0;
#ifdef CHARSET_EBCDIC
ebcdic2ascii(tmp, tmp, q - tmp - 1);
#endif
return tmp;
}
int openssl_strerror_r(int errnum, char *buf, size_t buflen)
{
#if defined(_MSC_VER) && _MSC_VER>=1400
return !strerror_s(buf, buflen, errnum);
#elif defined(_GNU_SOURCE)
return strerror_r(errnum, buf, buflen) != NULL;
#elif (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \
(defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600)
/*
* We can use "real" strerror_r. The OpenSSL version differs in that it
* gives 1 on success and 0 on failure for consistency with other OpenSSL
* functions. Real strerror_r does it the other way around
*/
return !strerror_r(errnum, buf, buflen);
#else
char *err;
/* Fall back to non-thread safe strerror()...its all we can do */
if (buflen < 2)
return 0;
err = strerror(errnum);
/* Can this ever happen? */
if (err == NULL)
return 0;
strncpy(buf, err, buflen - 1);
buf[buflen - 1] = '\0';
return 1;
#endif
}
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