openssl/crypto/conf/conf.c
Ulf Möller 9d1a01be8f Source code cleanups: Use void * rather than char * in lhash,
eliminate some of the -Wcast-qual warnings (debug-ben-strict target)
2000-01-30 22:20:28 +00:00

731 lines
15 KiB
C

/* 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 <openssl/stack.h>
#include <openssl/lhash.h>
#include <openssl/conf.h>
#include <openssl/buffer.h>
#include <openssl/err.h>
#include "conf_lcl.h"
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(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);
#define scan_esc(p) ((((p)[1] == '\0')?(p++):(p+=2)),p)
const char *CONF_version="CONF" OPENSSL_VERSION_PTEXT;
LHASH *CONF_load(LHASH *h, const char *file, long *line)
{
LHASH *ltmp;
BIO *in=NULL;
#ifdef VMS
in=BIO_new_file(file, "r");
#else
in=BIO_new_file(file, "rb");
#endif
if (in == NULL)
{
CONFerr(CONF_F_CONF_LOAD,ERR_R_SYS_LIB);
return NULL;
}
ltmp = CONF_load_bio(h, in, line);
BIO_free(in);
return ltmp;
}
#ifndef NO_FP_API
LHASH *CONF_load_fp(LHASH *h, FILE *in, long *line)
{
BIO *btmp;
LHASH *ltmp;
if(!(btmp = BIO_new_fp(in, BIO_NOCLOSE))) {
CONFerr(CONF_F_CONF_LOAD_FP,ERR_R_BUF_LIB);
return NULL;
}
ltmp = CONF_load_bio(h, btmp, line);
BIO_free(btmp);
return ltmp;
}
#endif
LHASH *CONF_load_bio(LHASH *h, BIO *in, long *line)
{
LHASH *ret=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_OF(CONF_VALUE) *section_sk=NULL,*ts;
char *start,*psection,*pname;
if ((buff=BUF_MEM_new()) == NULL)
{
CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_BUF_LIB);
goto err;
}
section=(char *)Malloc(10);
if (section == NULL)
{
CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
goto err;
}
strcpy(section,"default");
if (h == NULL)
{
if ((ret=lh_new(hash,cmp_conf)) == NULL)
{
CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_MALLOC_FAILURE);
goto err;
}
}
else
ret=h;
sv=new_section(ret,section);
if (sv == NULL)
{
CONFerr(CONF_F_CONF_LOAD_BIO,
CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
goto err;
}
section_sk=(STACK_OF(CONF_VALUE) *)sv->value;
bufnum=0;
for (;;)
{
again=0;
if (!BUF_MEM_grow(buff,bufnum+BUFSIZE))
{
CONFerr(CONF_F_CONF_LOAD_BIO,ERR_R_BUF_LIB);
goto err;
}
p= &(buff->data[bufnum]);
*p='\0';
BIO_gets(in, p, BUFSIZE-1);
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_BIO,
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_BIO,
CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
goto err;
}
section_sk=(STACK_OF(CONF_VALUE) *)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_BIO,
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))))
{
CONFerr(CONF_F_CONF_LOAD_BIO,
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_BIO,
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_BIO,
CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
goto err;
}
ts=(STACK_OF(CONF_VALUE) *)tv->value;
}
else
{
tv=sv;
ts=section_sk;
}
v->section=tv->section;
if (!sk_CONF_VALUE_push(ts,v))
{
CONFerr(CONF_F_CONF_LOAD_BIO,
ERR_R_MALLOC_FAILURE);
goto err;
}
vv=(CONF_VALUE *)lh_insert(ret,v);
if (vv != NULL)
{
sk_CONF_VALUE_delete_ptr(ts,vv);
Free(vv->name);
Free(vv->value);
Free(vv);
}
v=NULL;
}
}
if (buff != NULL) BUF_MEM_free(buff);
if (section != NULL) Free(section);
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 ((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(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,&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,&vv);
if (v != NULL)
return(v->value);
else
return(NULL);
}
else
return(Getenv(name));
}
static CONF_VALUE *get_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,&vv);
return(v);
}
STACK_OF(CONF_VALUE) *CONF_get_section(LHASH *conf, char *section)
{
CONF_VALUE *v;
v=get_section(conf,section);
if (v != NULL)
return((STACK_OF(CONF_VALUE) *)v->value);
else
return(NULL);
}
long CONF_get_number(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(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,conf);
/* We now have only 'section' entries in the hash table.
* Due to problems with */
lh_doall_arg(conf,(void (*)())value_free_stack,conf);
lh_free(conf);
}
static void value_free_hash(CONF_VALUE *a, LHASH *conf)
{
if (a->name != NULL)
{
a=(CONF_VALUE *)lh_delete(conf,a);
}
}
static void value_free_stack(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(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(LHASH *conf, char *section, char **pto, char *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(char *p)
{
while (IS_WS(*p) && (!IS_EOF(*p)))
p++;
return(p);
}
static char *eat_alpha_numeric(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(CONF_VALUE *v)
{
return((lh_strhash(v->section)<<2)^lh_strhash(v->name));
}
static int cmp_conf(CONF_VALUE *a, CONF_VALUE *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(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(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,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);
}
IMPLEMENT_STACK_OF(CONF_VALUE)