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/*
Copyright 2003-2008 Aris Adamantiadis
This file is part of the SSH Library
The SSH Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version.
The SSH Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the SSH Library; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "libssh/priv.h"
/** \defgroup ssh_string SSH Strings
* \brief string manipulations
*/
/** \addtogroup ssh_string
* @{ */
/**
* \brief Creates a new SSH String object
* \param size size of the string
* \return the newly allocated string
*/
STRING *string_new(unsigned int size){
STRING *str=malloc(size + 4);
str->size=htonl(size);
return str;
}
void string_fill(STRING *str, const void *data,int len){
memcpy(str->string,data,len);
}
/**
* \brief Creates a ssh stream using a C string
* \param what source 0-terminated C string
* \return the newly allocated string.
* \warning The nul byte is not copied nor counted in the ouput string.
*/
STRING *string_from_char(const char *what){
STRING *ptr;
int len=strlen(what);
ptr=malloc(4 + len);
ptr->size=htonl(len);
memcpy(ptr->string,what,len);
return ptr;
}
/**
* \brief returns the size of a SSH string
* \param str the input SSH string
* \return size of the content of str
*/
u32 string_len(STRING *str){
return ntohl(str->size);
}
/**
* \brief convert a SSH string to a C nul-terminated string
* \param str the input SSH string
* \return a malloc'ed string pointer.
* \warning If the input SSH string contains zeroes, some parts of
* the output string may not be readable with regular libc functions.
*/
char *string_to_char(STRING *str){
int len=ntohl(str->size)+1;
char *string=malloc(len);
memcpy(string,str->string,len-1);
string[len-1]=0;
return string;
}
STRING *string_copy(STRING *str){
STRING *ret=malloc(ntohl(str->size)+4);
ret->size=str->size;
memcpy(ret->string,str->string,ntohl(str->size));
return ret;
}
/** \brief destroy data in a string so it couldn't appear in a core dump
* \param s string to burn
*/
void string_burn(STRING *s){
memset(s->string,'X',string_len(s));
}
void *string_data(STRING *s){
return s->string;
}
/**
* \brief deallocate a STRING object
* \param s String to delete
*/
void string_free(STRING *s){
free(s);
}
/** @} */
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