const unsigned char *p;
int i;
- if ((tmp = OPENSSL_malloc(len * 3 + 1)) == NULL) {
+ 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;
}
return !strerror_s(buf, buflen, errnum);
#elif defined(_GNU_SOURCE)
return strerror_r(errnum, buf, buflen) != NULL;
-#elif (_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
+#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