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products/sources/formale Sprachen/C/Apache/server/ (Apache Software Stiftung Version 2.4.65^©) Datei vom 17.0.2021 mit Größe 5 kB

Quelle util_md5.c Sprache: C

/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

/************************************************************************
* NCSA HTTPd Server
* Software Development Group
* National Center for Supercomputing Applications
* University of Illinois at Urbana-Champaign
* 605 E. Springfield, Champaign, IL 61820
* httpd@ncsa.uiuc.edu
*
* Copyright  (C)  1995, Board of Trustees of the University of Illinois
*
************************************************************************
*
* md5.c: NCSA HTTPd code which uses the md5c.c RSA Code
*
*  Original Code Copyright (C) 1994, Jeff Hostetler, Spyglass, Inc.
*  Portions of Content-MD5 code Copyright (C) 1993, 1994 by Carnegie Mellon
*     University (see Copyright below).
*  Portions of Content-MD5 code Copyright (C) 1991 Bell Communications
*     Research, Inc. (Bellcore) (see Copyright below).
*  Portions extracted from mpack, John G. Myers - jgm+@cmu.edu
*  Content-MD5 Code contributed by Martin Hamilton (martin@net.lut.ac.uk)
*
*/

/* md5.c --Module Interface to MD5. */
/* Jeff Hostetler, Spyglass, Inc., 1994. */

#include "ap_config.h"
#include "apr_portable.h"
#include "apr_strings.h"
#include "httpd.h"
#include "util_md5.h"
#include "util_ebcdic.h"

AP_DECLARE(char *) ap_md5_binary(apr_pool_t *p, const unsigned char *buf, int length)
{
    apr_md5_ctx_t my_md5;
    unsigned char hash[APR_MD5_DIGESTSIZE];
    char *result;

    /*
     * Take the MD5 hash of the string argument.
     */

    apr_md5_init(&my_md5);
#if APR_CHARSET_EBCDIC
    apr_md5_set_xlate(&my_md5, ap_hdrs_to_ascii);
#endif
    apr_md5_update(&my_md5, buf, (unsigned int)length);
    apr_md5_final(hash, &my_md5);

    result = apr_palloc(p, 2 * APR_MD5_DIGESTSIZE + 1);
    ap_bin2hex(hash, APR_MD5_DIGESTSIZE, result); /* sets final '\0' */
    return result;
}

AP_DECLARE(char *) ap_md5(apr_pool_t *p, const unsigned char *string)
{
    return ap_md5_binary(p, string, (int) strlen((char *)string));
}

/* these portions extracted from mpack, John G. Myers - jgm+@cmu.edu */

/* (C) Copyright 1993,1994 by Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of Carnegie
* Mellon University not be used in advertising or publicity
* pertaining to distribution of the software without specific,
* written prior permission.  Carnegie Mellon University makes no
* representations about the suitability of this software for any
* purpose.  It is provided "as is" without express or implied
* warranty.
*
* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/

/*
* Copyright (c) 1991 Bell Communications Research, Inc. (Bellcore)
*
* Permission to use, copy, modify, and distribute this material
* for any purpose and without fee is hereby granted, provided
* that the above copyright notice and this permission notice
* appear in all copies, and that the name of Bellcore not be
* used in advertising or publicity pertaining to this
* material without the specific, prior written permission
* of an authorized representative of Bellcore.  BELLCORE
* MAKES NO REPRESENTATIONS ABOUT THE ACCURACY OR SUITABILITY
* OF THIS MATERIAL FOR ANY PURPOSE.  IT IS PROVIDED "AS IS",
* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
*/

static char basis_64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

AP_DECLARE(char *) ap_md5contextTo64(apr_pool_t *a, apr_md5_ctx_t *context)
{
    unsigned char digest[18];
    char *encodedDigest;
    int i;
    char *p;

    encodedDigest = (char *) apr_pcalloc(a, 25 * sizeof(char));

    apr_md5_final(digest, context);
    digest[sizeof(digest) - 1] = digest[sizeof(digest) - 2] = 0;

    p = encodedDigest;
    for (i = 0; i < sizeof(digest); i += 3) {
        *p++ = basis_64[digest[i] >> 2];
        *p++ = basis_64[((digest[i] & 0x3) << 4) | ((int) (digest[i + 1] & 0xF0) >> 4)];
        *p++ = basis_64[((digest[i + 1] & 0xF) << 2) | ((int) (digest[i + 2] & 0xC0) >> 6)];
        *p++ = basis_64[digest[i + 2] & 0x3F];
    }
    *p-- = '\0';
    *p-- = '=';
    *p-- = '=';
    return encodedDigest;
}

AP_DECLARE(char *) ap_md5digest(apr_pool_t *p, apr_file_t *infile)
{
    apr_md5_ctx_t context;
    unsigned char buf[4096]; /* keep this a multiple of 64 */
    apr_size_t nbytes;
    apr_off_t offset = 0L;

    apr_md5_init(&context);
    nbytes = sizeof(buf);
    while (apr_file_read(infile, buf, &nbytes) == APR_SUCCESS) {
        apr_md5_update(&context, buf, nbytes);
        nbytes = sizeof(buf);
    }
    apr_file_seek(infile, APR_SET, &offset);
    return ap_md5contextTo64(p, &context);
}

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