support_bits.cci

Go to the documentation of this file.

/*
 * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
 *
 * Squid software is distributed under GPLv2+ license and includes
 * contributions from numerous individuals and organizations.
 * Please see the COPYING and CONTRIBUTORS files for details.
 */
 
#ifndef SQUID_LIBNTLMAUTH_SUPPORT_BITS_CCI
#define SQUID_LIBNTLMAUTH_SUPPORT_BITS_CCI
 
#if HAVE_STRING_H
#include <string.h>
#endif
 
/*
 * Defines several functions which are used and mutually shared by the NTLM helpers
 * These do not (yet) have a defined stable home to go to.
 * For now include this file into helper main .cc where needed.
 */
 
/* makes a null-terminated string upper-case. Changes CONTENTS! */
inline void
uc(char *string)
{
    char *p = string, c;
    while ((c = *p)) {
        *p = xtoupper(c);
        ++p;
    }
}
 
/* makes a null-terminated string lower-case. Changes CONTENTS! */
inline void
lc(char *string)
{
    char *p = string, c;
    while ((c = *p)) {
        *p = xtolower(c);
        ++p;
    }
}
 
inline void
hex_dump(unsigned char *data, int size)
{
    /* dumps size bytes of *data to stdout. Looks like:
     * [0000] 75 6E 6B 6E 6F 77 6E 20
     *                  30 FF 00 00 00 00 39 00 unknown 0.....9.
     * (in a single line of course)
     */
 
    if (!data)
        return;
 
    if (debug_enabled) {
        unsigned char *p = data;
        unsigned char c;
        int n;
        char bytestr[4] = {0};
        char addrstr[10] = {0};
        char hexstr[16 * 3 + 5] = {0};
        char charstr[16 * 1 + 5] = {0};
        for (n = 1; n <= size; ++n) {
            if (n % 16 == 1) {
                /* store address for this line */
                snprintf(addrstr, sizeof(addrstr), "%.4x", (int) (p - data));
            }
            c = *p;
            if (xisalnum(c) == 0) {
                c = '.';
            }
            /* store hex str (for left side) */
            snprintf(bytestr, sizeof(bytestr), "%02X ", *p);
            strncat(hexstr, bytestr, sizeof(hexstr) - strlen(hexstr) - 1);
 
            /* store char str (for right side) */
            snprintf(bytestr, sizeof(bytestr), "%c", c);
            strncat(charstr, bytestr, sizeof(charstr) - strlen(charstr) - 1);
 
            if (n % 16 == 0) {
                /* line completed */
                fprintf(stderr, "[%4.4s]   %-50.50s  %s\n", addrstr, hexstr, charstr);
                hexstr[0] = 0;
                charstr[0] = 0;
            } else if (n % 8 == 0) {
                /* half line: add whitespaces */
                strncat(hexstr, "  ", sizeof(hexstr) - strlen(hexstr) - 1);
                strncat(charstr, " ", sizeof(charstr) - strlen(charstr) - 1);
            }
            ++p;                /* next byte */
        }
 
        if (strlen(hexstr) > 0) {
            /* print rest of buffer if not empty */
            fprintf(stderr, "[%4.4s]   %-50.50s  %s\n", addrstr, hexstr, charstr);
        }
    }
 
    if (0) { //temporary hack to keep the linker happy
        uc(nullptr);
        lc(nullptr);
        hex_dump(nullptr,0);
    }
 
}
 
#endif /* SQUID_LIBNTLMAUTH_SUPPORT_BITS_CCI */