227 lines
5.0 KiB
C
227 lines
5.0 KiB
C
/*-
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* Copyright (c) 2005-2010 Daniel Braniss <danny@cs.huji.ac.il>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/*
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| $Id: misc.c,v 2.1 2006/11/12 08:06:51 danny Exp $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <arpa/inet.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <dev/iscsi/initiator/iscsi.h>
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#include "iscontrol.h"
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static inline char
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c2b(unsigned char c)
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{
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switch(c) {
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case '0' ... '9':
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return c - '0';
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case 'a' ... 'f':
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return c - 'a' + 10;
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case 'A' ... 'F':
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return c - 'A' + 10;
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}
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return 0;
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}
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static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz"
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"0123456789+/";
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static __inline unsigned char
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c64tobin(unsigned char c64)
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{
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int i;
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for(i = 0; i < 64; i++)
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if(base64[i] == c64)
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break;
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return i;
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}
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/*
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| according to rfc3720, the binary string
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| cannot be larger than 1024 - but i can't find it :-) XXX
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| not enforced yet.
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*/
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int
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str2bin(char *str, char **rsp)
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{
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char *src, *dst, *tmp;
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int i, len = 0;
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src = str;
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tmp = NULL;
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if(strncasecmp("0x", src, 2) == 0) {
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src += 2;
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len = strlen(src);
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if((tmp = malloc((len+1)/2)) == NULL) {
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// XXX: print some error?
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return 0;
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}
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dst = tmp;
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if(len & 1)
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*dst++ = c2b(*src++);
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while(*src) {
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*dst = c2b(*src++) << 4;
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*dst++ |= c2b(*src++);
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}
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len = dst - tmp;
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} else
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if(strncasecmp("0b", src , 2) == 0) {
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// base64
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unsigned char b6;
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src += 2;
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len = strlen(src) / 4 * 3;
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if((tmp = malloc(len)) == NULL) {
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// XXX: print some error?
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return 0;
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}
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dst = tmp;
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i = 0;
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while(*src && ((b6 = c64tobin(*src++)) != 64)) {
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switch(i % 4) {
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case 0:
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*dst = b6 << 2;
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break;
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case 1:
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*dst++ |= b6 >> 4;
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*dst = b6 << 4;
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break;
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case 2:
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*dst++ |= b6 >> 2;
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*dst = b6 << 6;
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break;
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case 3:
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*dst++ |= b6;
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break;
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}
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i++;
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}
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len = dst - tmp;
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}
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else {
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/*
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| assume it to be an ascii string, so just copy it
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*/
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len = strlen(str);
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if((tmp = malloc(len)) == NULL)
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return 0;
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dst = tmp;
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src = str;
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while(*src)
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*dst++ = *src++;
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}
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*rsp = tmp;
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return len;
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}
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char *
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bin2str(char *encoding, unsigned char *md, int blen)
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{
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int len;
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char *dst, *ds;
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unsigned char *cp;
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if(strncasecmp(encoding, "0x", 2) == 0) {
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char ofmt[5];
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len = blen * 2;
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dst = malloc(len + 3);
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strcpy(dst, encoding);
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ds = dst + 2;
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cp = md;
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sprintf(ofmt, "%%02%c", encoding[1]);
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while(blen-- > 0) {
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sprintf(ds, ofmt, *cp++);
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ds += 2;
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}
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*ds = 0;
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return dst;
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}
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if(strncasecmp(encoding, "0b", 2) == 0) {
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int i, b6;
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len = (blen + 2) * 4 / 3;
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dst = malloc(len + 3);
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strcpy(dst, encoding);
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ds = dst + 2;
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cp = md;
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b6 = 0; // to keep compiler happy.
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for(i = 0; i < blen; i++) {
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switch(i % 3) {
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case 0:
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*ds++ = base64[*cp >> 2];
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b6 = (*cp & 0x3) << 4;
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break;
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case 1:
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b6 += (*cp >> 4);
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*ds++ = base64[b6];
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b6 = (*cp & 0xf) << 2;
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break;
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case 2:
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b6 += (*cp >> 6);
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*ds++ = base64[b6];
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*ds++ = base64[*cp & 0x3f];
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}
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cp++;
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}
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switch(blen % 3) {
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case 0:
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break;
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case 1:
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*ds++ = base64[b6];
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*ds++ = '=';
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*ds++ = '=';
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break;
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case 2:
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*ds++ = base64[b6];
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*ds++ = '=';
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break;
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}
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*ds = 0;
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return dst;
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}
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return NULL;
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}
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