kc3-lang/libbsd/src/md5.c

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• Hash : e35d9141
  Author :
  Date : 2021-02-11T04:41:46
  

  Add link-time warnings to MD5 wrapper functions Let's get the word out that these functions are deprecated and should be switched away from.

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• src/md5.c

• /*
   * Copyright © 2021 Guillem Jover <guillem@hadrons.org>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
   * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
   * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <stddef.h>
  #include <stdlib.h>
  #include <dlfcn.h>
  #include <md5.h>
  #include "local-link.h"
  
  static void (*libmd_MD5Init)(MD5_CTX *);
  static void (*libmd_MD5Update)(MD5_CTX *, const uint8_t *, size_t);
  static void (*libmd_MD5Pad)(MD5_CTX *);
  static void (*libmd_MD5Final)(uint8_t [MD5_DIGEST_LENGTH], MD5_CTX *);
  static void (*libmd_MD5Transform)(uint32_t [4], const uint8_t [MD5_BLOCK_LENGTH]);
  static char *(*libmd_MD5End)(MD5_CTX *, char *);
  static char *(*libmd_MD5File)(const char *, char *);
  static char *(*libmd_MD5FileChunk)(const char *, char *, off_t, off_t);
  static char *(*libmd_MD5Data)(const uint8_t *, size_t, char *);
  
  static void *
  libmd_loader(const char *symbol)
  {
  	void *func;
  
  	func = dlsym(RTLD_NEXT, symbol);
  	if (func == NULL) {
  		fprintf(stderr,
  		        "libbsd: cannot find wrapped symbol %s in libc or libmd\n",
  		        symbol);
  		abort();
  	}
  
  	return func;
  }
  
  #define libmd_wrapper(symbol) \
  	if (libmd_ ## symbol == NULL) \
  		libmd_ ## symbol = libmd_loader(#symbol)
  
  void
  MD5Init(MD5_CTX *context)
  {
  	libmd_wrapper(MD5Init);
  	libmd_MD5Init(context);
  }
  libbsd_link_warning(MD5Init,
                      "This function is a deprecated wrapper, use libmd instead.");
  
  void
  MD5Update(MD5_CTX *context, const uint8_t *data, size_t len)
  {
  	libmd_wrapper(MD5Update);
  	libmd_MD5Update(context, data, len);
  }
  libbsd_link_warning(MD5Update,
                      "This function is a deprecated wrapper, use libmd instead.");
  
  void
  MD5Pad(MD5_CTX *context)
  {
  	libmd_wrapper(MD5Pad);
  	libmd_MD5Pad(context);
  }
  libbsd_link_warning(MD5Pad,
                      "This function is a deprecated wrapper, use libmd instead.");
  
  void
  MD5Final(uint8_t digest[MD5_DIGEST_LENGTH], MD5_CTX *context)
  {
  	libmd_wrapper(MD5Final);
  	libmd_MD5Final(digest, context);
  }
  libbsd_link_warning(MD5Final,
                      "This function is a deprecated wrapper, use libmd instead.");
  
  void
  MD5Transform(uint32_t state[4], const uint8_t block[MD5_BLOCK_LENGTH])
  {
  	libmd_wrapper(MD5Transform);
  	libmd_MD5Transform(state, block);
  }
  libbsd_link_warning(MD5Transform,
                      "This function is a deprecated wrapper, use libmd instead.");
  
  char *
  MD5End(MD5_CTX *context, char *buf)
  {
  	libmd_wrapper(MD5End);
  	return libmd_MD5End(context, buf);
  }
  libbsd_link_warning(MD5End,
                      "This function is a deprecated wrapper, use libmd instead.");
  
  char *
  MD5File(const char *filename, char *buf)
  {
  	libmd_wrapper(MD5File);
  	return MD5File(filename, buf);
  }
  libbsd_link_warning(MD5File,
                      "This function is a deprecated wrapper, use libmd instead.");
  
  char *
  MD5FileChunk(const char *filename, char *buf, off_t offset, off_t length)
  {
  	libmd_wrapper(MD5FileChunk);
  	return libmd_MD5FileChunk(filename, buf, offset, length);
  }
  libbsd_link_warning(MD5FileChunk,
                      "This function is a deprecated wrapper, use libmd instead.");
  
  char *
  MD5Data(const uint8_t *data, size_t len, char *buf)
  {
  	libmd_wrapper(MD5Data);
  	return libmd_MD5Data(data, len, buf);
  }
  libbsd_link_warning(MD5Data,
                      "This function is a deprecated wrapper, use libmd instead.");
  

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