1 /* crypto/conf/conf.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
62 #include <openssl/stack.h>
63 #include <openssl/lhash.h>
64 #include <openssl/conf.h>
65 #include <openssl/buffer.h>
66 #include <openssl/err.h>
70 static void value_free_hash(CONF_VALUE *a, LHASH *conf);
71 static void value_free_stack(CONF_VALUE *a,LHASH *conf);
72 static unsigned long hash(CONF_VALUE *v);
73 static int cmp(CONF_VALUE *a,CONF_VALUE *b);
74 static char *eat_ws(char *p);
75 static char *eat_alpha_numeric(char *p);
76 static void clear_comments(char *p);
77 static int str_copy(LHASH *conf,char *section,char **to, char *from);
78 static char *scan_quote(char *p);
79 static CONF_VALUE *new_section(LHASH *conf,char *section);
80 static CONF_VALUE *get_section(LHASH *conf,char *section);
81 #define scan_esc(p) ((((p)[1] == '\0')?(p++):(p+=2)),p)
83 const char *CONF_version="CONF" OPENSSL_VERSION_PTEXT;
85 LHASH *CONF_load(LHASH *h, char *file, long *line)
96 CONF_VALUE *v=NULL,*vv,*tv;
98 char *section=NULL,*buf;
99 STACK *section_sk=NULL,*ts;
100 char *start,*psection,*pname;
102 if ((buff=BUF_MEM_new()) == NULL)
104 CONFerr(CONF_F_CONF_LOAD,ERR_R_BUF_LIB);
111 SYSerr(SYS_F_FOPEN,get_last_sys_error());
112 ERR_set_error_data(BUF_strdup(file),
113 ERR_TXT_MALLOCED|ERR_TXT_STRING);
114 CONFerr(CONF_F_CONF_LOAD,ERR_R_SYS_LIB);
118 section=(char *)Malloc(10);
121 CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
124 strcpy(section,"default");
128 if ((ret=lh_new(hash,cmp)) == NULL)
130 CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
137 sv=new_section(ret,section);
140 CONFerr(CONF_F_CONF_LOAD,CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
143 section_sk=(STACK *)sv->value;
149 if (!BUF_MEM_grow(buff,bufnum+BUFSIZE))
151 CONFerr(CONF_F_CONF_LOAD,ERR_R_BUF_LIB);
154 p= &(buff->data[bufnum]);
156 fgets(p,BUFSIZE-1,in);
162 if ((p[i-1] != '\r') && (p[i-1] != '\n'))
167 /* we removed some trailing stuff so there is a new
168 * line on the end. */
170 again=1; /* long line */
174 eline++; /* another input line */
177 /* we now have a line with trailing \r\n removed */
179 /* i is the number of bytes */
183 /* check for line continuation */
186 /* If we have bytes and the last char '\\' and
187 * second last char is not '\\' */
188 p= &(buff->data[bufnum-1]);
190 ((bufnum <= 1) || !IS_ESC(p[-1])))
203 if (IS_EOF(*s)) continue; /* blank line */
212 end=eat_alpha_numeric(ss);
221 CONFerr(CONF_F_CONF_LOAD,CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
225 if (!str_copy(ret,NULL,§ion,start)) goto err;
226 if ((sv=get_section(ret,section)) == NULL)
227 sv=new_section(ret,section);
230 CONFerr(CONF_F_CONF_LOAD,CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
233 section_sk=(STACK *)sv->value;
240 end=eat_alpha_numeric(s);
241 if ((end[0] == ':') && (end[1] == ':'))
247 end=eat_alpha_numeric(end);
252 CONFerr(CONF_F_CONF_LOAD,CONF_R_MISSING_EQUAL_SIGN);
261 while ((p != start) && (IS_WS(*p)))
266 if ((v=(CONF_VALUE *)Malloc(sizeof(CONF_VALUE))) == NULL)
268 CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
271 if (psection == NULL) psection=section;
272 v->name=(char *)Malloc(strlen(pname)+1);
276 CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
279 strcpy(v->name,pname);
280 if (!str_copy(ret,psection,&(v->value),start)) goto err;
282 if (strcmp(psection,section) != 0)
284 if ((tv=get_section(ret,psection))
286 tv=new_section(ret,psection);
289 CONFerr(CONF_F_CONF_LOAD,CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
292 ts=(STACK *)tv->value;
299 v->section=tv->section;
300 if (!sk_push(ts,(char *)v))
302 CONFerr(CONF_F_CONF_LOAD,ERR_R_MALLOC_FAILURE);
305 vv=(CONF_VALUE *)lh_insert(ret,(char *)v);
308 sk_delete_ptr(ts,(char *)vv);
316 if (buff != NULL) BUF_MEM_free(buff);
317 if (section != NULL) Free(section);
318 if (in != NULL) fclose(in);
321 if (buff != NULL) BUF_MEM_free(buff);
322 if (section != NULL) Free(section);
323 if (line != NULL) *line=eline;
324 sprintf(btmp,"%ld",eline);
325 ERR_add_error_data(2,"line ",btmp);
326 if (in != NULL) fclose(in);
327 if ((h != ret) && (ret != NULL)) CONF_free(ret);
330 if (v->name != NULL) Free(v->name);
331 if (v->value != NULL) Free(v->value);
332 if (v != NULL) Free(v);
337 char *CONF_get_string(LHASH *conf, char *section, char *name)
342 if (name == NULL) return(NULL);
349 v=(CONF_VALUE *)lh_retrieve(conf,(char *)&vv);
350 if (v != NULL) return(v->value);
351 if (strcmp(section,"ENV") == 0)
354 if (p != NULL) return(p);
357 vv.section=BUF_strdup("default");
359 v=(CONF_VALUE *)lh_retrieve(conf,(char *)&vv);
366 return(Getenv(name));
369 static CONF_VALUE *get_section(LHASH *conf, char *section)
373 if ((conf == NULL) || (section == NULL)) return(NULL);
376 v=(CONF_VALUE *)lh_retrieve(conf,(char *)&vv);
380 STACK *CONF_get_section(LHASH *conf, char *section)
384 v=get_section(conf,section);
386 return((STACK *)v->value);
391 long CONF_get_number(LHASH *conf, char *section, char *name)
396 str=CONF_get_string(conf,section,name);
397 if (str == NULL) return(0);
401 ret=ret*10+(*str -'0');
408 void CONF_free(LHASH *conf)
410 if (conf == NULL) return;
412 conf->down_load=0; /* evil thing to make sure the 'Free()'
413 * works as expected */
414 lh_doall_arg(conf,(void (*)())value_free_hash,(char *)conf);
416 /* We now have only 'section' entries in the hash table.
417 * Due to problems with */
419 lh_doall_arg(conf,(void (*)())value_free_stack,(char *)conf);
423 static void value_free_hash(CONF_VALUE *a, LHASH *conf)
427 a=(CONF_VALUE *)lh_delete(conf,(char *)a);
431 static void value_free_stack(CONF_VALUE *a, LHASH *conf)
437 if (a->name != NULL) return;
439 sk=(STACK *)a->value;
440 for (i=sk_num(sk)-1; i>=0; i--)
442 vv=(CONF_VALUE *)sk_value(sk,i);
447 if (sk != NULL) sk_free(sk);
452 static void clear_comments(char *p)
481 static int str_copy(LHASH *conf, char *section, char **pto, char *from)
483 int q,r,rr=0,to=0,len=0;
484 char *s,*e,*rp,*p,*rrp,*np,*cp,v;
487 if ((buf=BUF_MEM_new()) == NULL) return(0);
490 if (!BUF_MEM_grow(buf,len)) goto err;
498 while ((*from != '\0') && (*from != q))
503 if (*from == '\0') break;
505 buf->data[to++]= *(from++);
508 else if (*from == '\\')
512 if (v == '\0') break;
513 else if (v == 'r') v='\r';
514 else if (v == 'n') v='\n';
515 else if (v == 'b') v='\b';
516 else if (v == 't') v='\t';
519 else if (*from == '\0')
521 else if (*from == '$')
523 /* try to expand it */
535 while (IS_ALPHA_NUMERIC(*e))
537 if ((e[0] == ':') && (e[1] == ':'))
545 while (IS_ALPHA_NUMERIC(*e))
555 CONFerr(CONF_F_STR_COPY,CONF_R_NO_CLOSE_BRACE);
560 /* So at this point we have
561 * ns which is the start of the name string which is
563 * cs which is the start of the section string which is
565 * e is the 'next point after'.
566 * r and s are the chars replaced by the '\0'
567 * rp and sp is where 'r' and 's' came from.
569 p=CONF_get_string(conf,cp,np);
570 if (rrp != NULL) *rrp=rr;
574 CONFerr(CONF_F_STR_COPY,CONF_R_VARIABLE_HAS_NO_VALUE);
577 BUF_MEM_grow(buf,(strlen(p)+len-(e-from)));
579 buf->data[to++]= *(p++);
583 buf->data[to++]= *(from++);
586 if (*pto != NULL) Free(*pto);
591 if (buf != NULL) BUF_MEM_free(buf);
595 static char *eat_ws(char *p)
597 while (IS_WS(*p) && (!IS_EOF(*p)))
602 static char *eat_alpha_numeric(char *p)
611 if (!IS_ALPHA_NUMERIC_PUNCT(*p))
617 static unsigned long hash(CONF_VALUE *v)
619 return((lh_strhash(v->section)<<2)^lh_strhash(v->name));
622 static int cmp(CONF_VALUE *a, CONF_VALUE *b)
626 if (a->section != b->section)
628 i=strcmp(a->section,b->section);
632 if ((a->name != NULL) && (b->name != NULL))
634 i=strcmp(a->name,b->name);
637 else if (a->name == b->name)
640 return((a->name == NULL)?-1:1);
643 static char *scan_quote(char *p)
648 while (!(IS_EOF(*p)) && (*p != q))
653 if (IS_EOF(*p)) return(p);
661 static CONF_VALUE *new_section(LHASH *conf, char *section)
665 CONF_VALUE *v=NULL,*vv;
667 if ((sk=sk_new_null()) == NULL)
669 if ((v=(CONF_VALUE *)Malloc(sizeof(CONF_VALUE))) == NULL)
672 if ((v->section=(char *)Malloc(i)) == NULL)
675 memcpy(v->section,section,i);
679 vv=(CONF_VALUE *)lh_insert(conf,(char *)v);
682 #if !defined(NO_STDIO) && !defined(WIN16)
683 fprintf(stderr,"internal fault\n");
691 if (sk != NULL) sk_free(sk);
692 if (v != NULL) Free(v);