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openssl/crypto/conf/conf.c
Ralf S. Engelschall 9cb0969f65 Fix version stuff: 
1. The already released version was 0.9.1c and not 0.9.1b

2. The next release should be 0.9.2 and not 0.9.1d, because
   first the changes are already too large, second we should avoid any more
   0.9.1x confusions and third, the Apache version semantics of
   VERSION.REVISION.PATCHLEVEL for the version string is reasonable (and here
   .2 is already just a patchlevel and not major change).
tVS: ----------------------------------------------------------------------
1998-12-31 09:36:40 +00:00

740 lines
15 KiB
C
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/* crypto/conf/conf.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.]
*/
#include <stdio.h>
#include <errno.h>
#include "cryptlib.h"
#include "stack.h"
#include "lhash.h"
#include "conf.h"
#include "buffer.h"
#include "err.h"
#include "conf_lcl.h"
#ifndef NOPROTO
static void value_free_hash(CONF_VALUE *a, LHASH *conf);
static void value_free_stack(CONF_VALUE *a,LHASH *conf);
static unsigned long hash(CONF_VALUE *v);
static int cmp(CONF_VALUE *a,CONF_VALUE *b);
static char *eat_ws(char *p);
static char *eat_alpha_numeric(char *p);
static void clear_comments(char *p);
static int str_copy(LHASH *conf,char *section,char **to, char *from);
static char *scan_quote(char *p);
static CONF_VALUE *new_section(LHASH *conf,char *section);
static CONF_VALUE *get_section(LHASH *conf,char *section);
#else
static void value_free_hash();
static void value_free_stack();
static unsigned long hash();
static int cmp();
static char *eat_ws();
static char *eat_alpha_numeric();
static void clear_comments();
static int str_copy();
static char *scan_quote();
static CONF_VALUE *new_section();
static CONF_VALUE *get_section();
#endif
#define scan_esc(p) ((((p)[1] == '\0')?(p++):(p+=2)),p)
char *CONF_version="CONF part of OpenSSL 0.9.2 31-Dec-1998";
LHASH *CONF_load(h,file,line)
LHASH *h;
char *file;
long *line;
{
LHASH *ret=NULL;
FILE *in=NULL;
#define BUFSIZE 512
char btmp[16];
int bufnum=0,i,ii;
BUF_MEM *buff=NULL;
char *s,*p,*end;
int again,n;
long eline=0;
CONF_VALUE *v=NULL,*vv,*tv;
CONF_VALUE *sv=NULL;
char *section=NULL,*buf;
STACK *section_sk=NULL,*ts;
char *start,*psection,*pname;
if ((buff=BUF_MEM_new()) == NULL)
{
CONFerr(CONF_F_CONF_LOAD,ERR_R_BUF_LIB);
goto err;
}
in=fopen(file,"rb");
if (in == NULL)
{
SYSerr(SYS_F_FOPEN,get_last_sys_error());
ERR_set_error_data(BUF_strdup(file),
ERR_TXT_MALLOCED|ERR_TXT_STRING);
CONFerr(CONF_F_CONF_LOAD,ERR_R_SYS_LIB);
goto err;
}
section=(char *)Malloc(10);
if (section == NULL)
{
CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
goto err;
}
strcpy(section,"default");
if (h == NULL)
{
if ((ret=lh_new(hash,cmp)) == NULL)
{
CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
goto err;
}
}
else
ret=h;
sv=new_section(ret,section);
if (sv == NULL)
{
CONFerr(CONF_F_CONF_LOAD,CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
goto err;
}
section_sk=(STACK *)sv->value;
bufnum=0;
for (;;)
{
again=0;
if (!BUF_MEM_grow(buff,bufnum+BUFSIZE))
{
CONFerr(CONF_F_CONF_LOAD,ERR_R_BUF_LIB);
goto err;
}
p= &(buff->data[bufnum]);
*p='\0';
fgets(p,BUFSIZE-1,in);
p[BUFSIZE-1]='\0';
ii=i=strlen(p);
if (i == 0) break;
while (i > 0)
{
if ((p[i-1] != '\r') && (p[i-1] != '\n'))
break;
else
i--;
}
/* we removed some trailing stuff so there is a new
* line on the end. */
if (i == ii)
again=1; /* long line */
else
{
p[i]='\0';
eline++; /* another input line */
}
/* we now have a line with trailing \r\n removed */
/* i is the number of bytes */
bufnum+=i;
v=NULL;
/* check for line continuation */
if (bufnum >= 1)
{
/* If we have bytes and the last char '\\' and
* second last char is not '\\' */
p= &(buff->data[bufnum-1]);
if ( IS_ESC(p[0]) &&
((bufnum <= 1) || !IS_ESC(p[-1])))
{
bufnum--;
again=1;
}
}
if (again) continue;
bufnum=0;
buf=buff->data;
clear_comments(buf);
n=strlen(buf);
s=eat_ws(buf);
if (IS_EOF(*s)) continue; /* blank line */
if (*s == '[')
{
char *ss;
s++;
start=eat_ws(s);
ss=start;
again:
end=eat_alpha_numeric(ss);
p=eat_ws(end);
if (*p != ']')
{
if (*p != '\0')
{
ss=p;
goto again;
}
CONFerr(CONF_F_CONF_LOAD,CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
goto err;
}
*end='\0';
if (!str_copy(ret,NULL,&section,start)) goto err;
if ((sv=get_section(ret,section)) == NULL)
sv=new_section(ret,section);
if (sv == NULL)
{
CONFerr(CONF_F_CONF_LOAD,CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
goto err;
}
section_sk=(STACK *)sv->value;
continue;
}
else
{
pname=s;
psection=NULL;
end=eat_alpha_numeric(s);
if ((end[0] == ':') && (end[1] == ':'))
{
*end='\0';
end+=2;
psection=pname;
pname=end;
end=eat_alpha_numeric(end);
}
p=eat_ws(end);
if (*p != '=')
{
CONFerr(CONF_F_CONF_LOAD,CONF_R_MISSING_EQUAL_SIGN);
goto err;
}
*end='\0';
p++;
start=eat_ws(p);
while (!IS_EOF(*p))
p++;
p--;
while ((p != start) && (IS_WS(*p)))
p--;
p++;
*p='\0';
if ((v=(CONF_VALUE *)Malloc(sizeof(CONF_VALUE))) == NULL)
{
CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
goto err;
}
if (psection == NULL) psection=section;
v->name=(char *)Malloc(strlen(pname)+1);
v->value=NULL;
if (v->name == NULL)
{
CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
goto err;
}
strcpy(v->name,pname);
if (!str_copy(ret,psection,&(v->value),start)) goto err;
if (strcmp(psection,section) != 0)
{
if ((tv=get_section(ret,psection))
== NULL)
tv=new_section(ret,psection);
if (tv == NULL)
{
CONFerr(CONF_F_CONF_LOAD,CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
goto err;
}
ts=(STACK *)tv->value;
}
else
{
tv=sv;
ts=section_sk;
}
v->section=tv->section;
if (!sk_push(ts,(char *)v))
{
CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
goto err;
}
vv=(CONF_VALUE *)lh_insert(ret,(char *)v);
if (vv != NULL)
{
sk_delete_ptr(ts,(char *)vv);
Free(vv->name);
Free(vv->value);
Free(vv);
}
v=NULL;
}
}
if (buff != NULL) BUF_MEM_free(buff);
if (section != NULL) Free(section);
if (in != NULL) fclose(in);
return(ret);
err:
if (buff != NULL) BUF_MEM_free(buff);
if (section != NULL) Free(section);
if (line != NULL) *line=eline;
sprintf(btmp,"%ld",eline);
ERR_add_error_data(2,"line ",btmp);
if (in != NULL) fclose(in);
if ((h != ret) && (ret != NULL)) CONF_free(ret);
if (v != NULL)
{
if (v->name != NULL) Free(v->name);
if (v->value != NULL) Free(v->value);
if (v != NULL) Free(v);
}
return(NULL);
}
char *CONF_get_string(conf,section,name)
LHASH *conf;
char *section;
char *name;
{
CONF_VALUE *v,vv;
char *p;
if (name == NULL) return(NULL);
if (conf != NULL)
{
if (section != NULL)
{
vv.name=name;
vv.section=section;
v=(CONF_VALUE *)lh_retrieve(conf,(char *)&vv);
if (v != NULL) return(v->value);
if (strcmp(section,"ENV") == 0)
{
p=Getenv(name);
if (p != NULL) return(p);
}
}
vv.section="default";
vv.name=name;
v=(CONF_VALUE *)lh_retrieve(conf,(char *)&vv);
if (v != NULL)
return(v->value);
else
return(NULL);
}
else
return(Getenv(name));
}
static CONF_VALUE *get_section(conf,section)
LHASH *conf;
char *section;
{
CONF_VALUE *v,vv;
if ((conf == NULL) || (section == NULL)) return(NULL);
vv.name=NULL;
vv.section=section;
v=(CONF_VALUE *)lh_retrieve(conf,(char *)&vv);
return(v);
}
STACK *CONF_get_section(conf,section)
LHASH *conf;
char *section;
{
CONF_VALUE *v;
v=get_section(conf,section);
if (v != NULL)
return((STACK *)v->value);
else
return(NULL);
}
long CONF_get_number(conf,section,name)
LHASH *conf;
char *section;
char *name;
{
char *str;
long ret=0;
str=CONF_get_string(conf,section,name);
if (str == NULL) return(0);
for (;;)
{
if (IS_NUMER(*str))
ret=ret*10+(*str -'0');
else
return(ret);
str++;
}
}
void CONF_free(conf)
LHASH *conf;
{
if (conf == NULL) return;
conf->down_load=0; /* evil thing to make sure the 'Free()'
* works as expected */
lh_doall_arg(conf,(void (*)())value_free_hash,(char *)conf);
/* We now have only 'section' entries in the hash table.
* Due to problems with */
lh_doall_arg(conf,(void (*)())value_free_stack,(char *)conf);
lh_free(conf);
}
static void value_free_hash(a,conf)
CONF_VALUE *a;
LHASH *conf;
{
if (a->name != NULL)
{
a=(CONF_VALUE *)lh_delete(conf,(char *)a);
}
}
static void value_free_stack(a,conf)
CONF_VALUE *a;
LHASH *conf;
{
CONF_VALUE *vv;
STACK *sk;
int i;
if (a->name != NULL) return;
sk=(STACK *)a->value;
for (i=sk_num(sk)-1; i>=0; i--)
{
vv=(CONF_VALUE *)sk_value(sk,i);
Free(vv->value);
Free(vv->name);
Free(vv);
}
if (sk != NULL) sk_free(sk);
Free(a->section);
Free(a);
}
static void clear_comments(p)
char *p;
{
char *to;
to=p;
for (;;)
{
if (IS_COMMENT(*p))
{
*p='\0';
return;
}
if (IS_QUOTE(*p))
{
p=scan_quote(p);
continue;
}
if (IS_ESC(*p))
{
p=scan_esc(p);
continue;
}
if (IS_EOF(*p))
return;
else
p++;
}
}
static int str_copy(conf,section,pto,from)
LHASH *conf;
char *section;
char **pto,*from;
{
int q,r,rr=0,to=0,len=0;
char *s,*e,*rp,*p,*rrp,*np,*cp,v;
BUF_MEM *buf;
if ((buf=BUF_MEM_new()) == NULL) return(0);
len=strlen(from)+1;
if (!BUF_MEM_grow(buf,len)) goto err;
for (;;)
{
if (IS_QUOTE(*from))
{
q= *from;
from++;
while ((*from != '\0') && (*from != q))
{
if (*from == '\\')
{
from++;
if (*from == '\0') break;
}
buf->data[to++]= *(from++);
}
}
else if (*from == '\\')
{
from++;
v= *(from++);
if (v == '\0') break;
else if (v == 'r') v='\r';
else if (v == 'n') v='\n';
else if (v == 'b') v='\b';
else if (v == 't') v='\t';
buf->data[to++]= v;
}
else if (*from == '\0')
break;
else if (*from == '$')
{
/* try to expand it */
rrp=NULL;
s= &(from[1]);
if (*s == '{')
q='}';
else if (*s == '(')
q=')';
else q=0;
if (q) s++;
cp=section;
e=np=s;
while (IS_ALPHA_NUMERIC(*e))
e++;
if ((e[0] == ':') && (e[1] == ':'))
{
cp=np;
rrp=e;
rr= *e;
*rrp='\0';
e+=2;
np=e;
while (IS_ALPHA_NUMERIC(*e))
e++;
}
r= *e;
*e='\0';
rp=e;
if (q)
{
if (r != q)
{
CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE);
goto err;
}
e++;
}
/* So at this point we have
* ns which is the start of the name string which is
* '\0' terminated.
* cs which is the start of the section string which is
* '\0' terminated.
* e is the 'next point after'.
* r and s are the chars replaced by the '\0'
* rp and sp is where 'r' and 's' came from.
*/
p=CONF_get_string(conf,cp,np);
if (rrp != NULL) *rrp=rr;
*rp=r;
if (p == NULL)
{
CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE);
goto err;
}
BUF_MEM_grow(buf,(strlen(p)+len-(e-from)));
while (*p)
buf->data[to++]= *(p++);
from=e;
}
else
buf->data[to++]= *(from++);
}
buf->data[to]='\0';
if (*pto != NULL) Free(*pto);
*pto=buf->data;
Free(buf);
return(1);
err:
if (buf != NULL) BUF_MEM_free(buf);
return(0);
}
static char *eat_ws(p)
char *p;
{
while (IS_WS(*p) && (!IS_EOF(*p)))
p++;
return(p);
}
static char *eat_alpha_numeric(p)
char *p;
{
for (;;)
{
if (IS_ESC(*p))
{
p=scan_esc(p);
continue;
}
if (!IS_ALPHA_NUMERIC_PUNCT(*p))
return(p);
p++;
}
}
static unsigned long hash(v)
CONF_VALUE *v;
{
return((lh_strhash(v->section)<<2)^lh_strhash(v->name));
}
static int cmp(a,b)
CONF_VALUE *a,*b;
{
int i;
if (a->section != b->section)
{
i=strcmp(a->section,b->section);
if (i) return(i);
}
if ((a->name != NULL) && (b->name != NULL))
{
i=strcmp(a->name,b->name);
return(i);
}
else if (a->name == b->name)
return(0);
else
return((a->name == NULL)?-1:1);
}
static char *scan_quote(p)
char *p;
{
int q= *p;
p++;
while (!(IS_EOF(*p)) && (*p != q))
{
if (IS_ESC(*p))
{
p++;
if (IS_EOF(*p)) return(p);
}
p++;
}
if (*p == q) p++;
return(p);
}
static CONF_VALUE *new_section(conf,section)
LHASH *conf;
char *section;
{
STACK *sk=NULL;
int ok=0,i;
CONF_VALUE *v=NULL,*vv;
if ((sk=sk_new_null()) == NULL)
goto err;
if ((v=(CONF_VALUE *)Malloc(sizeof(CONF_VALUE))) == NULL)
goto err;
i=strlen(section)+1;
if ((v->section=(char *)Malloc(i)) == NULL)
goto err;
memcpy(v->section,section,i);
v->name=NULL;
v->value=(char *)sk;
vv=(CONF_VALUE *)lh_insert(conf,(char *)v);
if (vv != NULL)
{
#if !defined(NO_STDIO) && !defined(WIN16)
fprintf(stderr,"internal fault\n");
#endif
abort();
}
ok=1;
err:
if (!ok)
{
if (sk != NULL) sk_free(sk);
if (v != NULL) Free(v);
v=NULL;
}
return(v);
}
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