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err.c

/* crypto/err/err.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * 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 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 OR CONTRIBUTORS 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.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
 *
 * 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. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS CONTRIBUTORS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "cryptlib.h"
#include <openssl/lhash.h>
#include <openssl/crypto.h>
#include <openssl/buffer.h>
#include <openssl/bio.h>
#include <openssl/err.h>

static unsigned long get_error_values(int inc,int top,
                              const char **file,int *line,
                              const char **data,int *flags);

#define err_clear_data(p,i) \
      do { \
      if (((p)->err_data[i] != NULL) && \
            (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
            {  \
            OPENSSL_free((p)->err_data[i]); \
            (p)->err_data[i]=NULL; \
            } \
      (p)->err_data_flags[i]=0; \
      } while(0)

#define err_clear(p,i) \
      do { \
      (p)->err_flags[i]=0; \
      (p)->err_buffer[i]=0; \
      err_clear_data(p,i); \
      (p)->err_file[i]=NULL; \
      (p)->err_line[i]= -1; \
      } while(0)

void ERR_put_error(int lib, int func, int reason, const char *file,
           int line)
      {
      ERR_STATE *es;

#ifdef _OSD_POSIX
      /* In the BS2000-OSD POSIX subsystem, the compiler generates
       * path names in the form "*POSIX(/etc/passwd)".
       * This dirty hack strips them to something sensible.
       * @@@ We shouldn't modify a const string, though.
       */
      if (strncmp(file,"*POSIX(", sizeof("*POSIX(")-1) == 0) {
            char *end;

            /* Skip the "*POSIX(" prefix */
            file += sizeof("*POSIX(")-1;
            end = &file[strlen(file)-1];
            if (*end == ')')
                  *end = '\0';
            /* Optional: use the basename of the path only. */
            if ((end = strrchr(file, '/')) != NULL)
                  file = &end[1];
      }
#endif
      es=ERR_get_state();

      es->top=(es->top+1)%ERR_NUM_ERRORS;
      if (es->top == es->bottom)
            es->bottom=(es->bottom+1)%ERR_NUM_ERRORS;
      es->err_flags[es->top]=0;
      es->err_buffer[es->top]=ERR_PACK(lib,func,reason);
      es->err_file[es->top]=file;
      es->err_line[es->top]=line;
      err_clear_data(es,es->top);
      }

void ERR_clear_error(void)
      {
      int i;
      ERR_STATE *es;

      es=ERR_get_state();

      for (i=0; i<ERR_NUM_ERRORS; i++)
            {
            err_clear(es,i);
            }
      es->top=es->bottom=0;
      }


unsigned long ERR_get_error(void)
      { return(get_error_values(1,0,NULL,NULL,NULL,NULL)); }

unsigned long ERR_get_error_line(const char **file,
           int *line)
      { return(get_error_values(1,0,file,line,NULL,NULL)); }

unsigned long ERR_get_error_line_data(const char **file, int *line,
           const char **data, int *flags)
      { return(get_error_values(1,0,file,line,data,flags)); }


unsigned long ERR_peek_error(void)
      { return(get_error_values(0,0,NULL,NULL,NULL,NULL)); }

unsigned long ERR_peek_error_line(const char **file, int *line)
      { return(get_error_values(0,0,file,line,NULL,NULL)); }

unsigned long ERR_peek_error_line_data(const char **file, int *line,
           const char **data, int *flags)
      { return(get_error_values(0,0,file,line,data,flags)); }


unsigned long ERR_peek_last_error(void)
      { return(get_error_values(0,1,NULL,NULL,NULL,NULL)); }

unsigned long ERR_peek_last_error_line(const char **file, int *line)
      { return(get_error_values(0,1,file,line,NULL,NULL)); }

unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
           const char **data, int *flags)
      { return(get_error_values(0,1,file,line,data,flags)); }


static unsigned long get_error_values(int inc, int top, const char **file, int *line,
           const char **data, int *flags)
      {     
      int i=0;
      ERR_STATE *es;
      unsigned long ret;

      es=ERR_get_state();

      if (inc && top)
            {
            if (file) *file = "";
            if (line) *line = 0;
            if (data) *data = "";
            if (flags) *flags = 0;
                  
            return ERR_R_INTERNAL_ERROR;
            }

      if (es->bottom == es->top) return 0;
      if (top)
            i=es->top;               /* last error */
      else
            i=(es->bottom+1)%ERR_NUM_ERRORS; /* first error */

      ret=es->err_buffer[i];
      if (inc)
            {
            es->bottom=i;
            es->err_buffer[i]=0;
            }

      if ((file != NULL) && (line != NULL))
            {
            if (es->err_file[i] == NULL)
                  {
                  *file="NA";
                  if (line != NULL) *line=0;
                  }
            else
                  {
                  *file=es->err_file[i];
                  if (line != NULL) *line=es->err_line[i];
                  }
            }

      if (data == NULL)
            {
            if (inc)
                  {
                  err_clear_data(es, i);
                  }
            }
      else
            {
            if (es->err_data[i] == NULL)
                  {
                  *data="";
                  if (flags != NULL) *flags=0;
                  }
            else
                  {
                  *data=es->err_data[i];
                  if (flags != NULL) *flags=es->err_data_flags[i];
                  }
            }
      return ret;
      }

void ERR_set_error_data(char *data, int flags)
      {
      ERR_STATE *es;
      int i;

      es=ERR_get_state();

      i=es->top;
      if (i == 0)
            i=ERR_NUM_ERRORS-1;

      err_clear_data(es,i);
      es->err_data[i]=data;
      es->err_data_flags[i]=flags;
      }

void ERR_add_error_data(int num, ...)
      {
      va_list args;
      int i,n,s;
      char *str,*p,*a;

      s=80;
      str=OPENSSL_malloc(s+1);
      if (str == NULL) return;
      str[0]='\0';

      va_start(args, num);
      n=0;
      for (i=0; i<num; i++)
            {
            a=va_arg(args, char*);
            /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
            if (a != NULL)
                  {
                  n+=strlen(a);
                  if (n > s)
                        {
                        s=n+20;
                        p=OPENSSL_realloc(str,s+1);
                        if (p == NULL)
                              {
                              OPENSSL_free(str);
                              goto err;
                              }
                        else
                              str=p;
                        }
                  BUF_strlcat(str,a,(size_t)s+1);
                  }
            }
      ERR_set_error_data(str,ERR_TXT_MALLOCED|ERR_TXT_STRING);

err:
      va_end(args);
      }

int ERR_set_mark(void)
      {
      ERR_STATE *es;

      es=ERR_get_state();

      if (es->bottom == es->top) return 0;
      es->err_flags[es->top]|=ERR_FLAG_MARK;
      return 1;
      }

int ERR_pop_to_mark(void)
      {
      ERR_STATE *es;

      es=ERR_get_state();

      while(es->bottom != es->top
            && (es->err_flags[es->top] & ERR_FLAG_MARK) == 0)
            {
            err_clear(es,es->top);
            es->top-=1;
            if (es->top == -1) es->top=ERR_NUM_ERRORS-1;
            }
            
      if (es->bottom == es->top) return 0;
      es->err_flags[es->top]&=~ERR_FLAG_MARK;
      return 1;
      }

#ifdef OPENSSL_FIPS

static ERR_STATE *fget_state(void)
      {
      static ERR_STATE fstate;
      return &fstate;
      }

ERR_STATE *(*get_state_func)(void) = fget_state;
void (*remove_state_func)(unsigned long pid);

ERR_STATE *ERR_get_state(void)
      {
      return get_state_func();
      }

void int_ERR_set_state_func(ERR_STATE *(*get_func)(void),
                        void (*remove_func)(unsigned long pid))
      {
      get_state_func = get_func;
      remove_state_func = remove_func;
      }

void ERR_remove_state(unsigned long pid)
      {
      if (remove_state_func)
            remove_state_func(pid);
      }

#endif

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