a83b802bad
These are the start of a lot of work to clean up the FreeBSD eBones code. these changes include, but are not limited to: - Create prototypes for all the library routines - Make all the libraries compile clean with -Wall set - Fix numerous small bugs shown up in the above process - Prepare the code for libdes's removal to secure/ - add register, registerd and make_keypair to the make Lots more will follow in days to come. OK'ed by: rgrimes
740 lines
18 KiB
C
740 lines
18 KiB
C
/*
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* Copyright 1988 by the Massachusetts Institute of Technology.
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* For copying and distribution information, please see the file
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* <Copyright.MIT>.
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*
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* Purpose:
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* This module was developed to parse the "~/.klogin" files for
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* Kerberos-authenticated rlogin/rcp/rsh services. However, it is
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* general purpose and can be used to parse any such parameter file.
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*
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* The parameter file should consist of one or more entries, with each
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* entry on a separate line and consisting of zero or more
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* "keyword=value" combinations. The keyword is case insensitive, but
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* the value is not. Any string may be enclosed in quotes, and
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* c-style "\" literals are supported. A comma may be used to
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* separate the k/v combinations, and multiple commas are ignored.
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* Whitespace (blank or tab) may be used freely and is ignored.
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*
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* Full error processing is available. When PS_BAD_KEYWORD or
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* PS_SYNTAX is returned from fGetParameterSet(), the string ErrorMsg
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* contains a meaningful error message.
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*
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* Keywords and their default values are programmed by an external
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* table.
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*
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* Routines:
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* fGetParameterSet() parse one line of the parameter file
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* fGetKeywordValue() parse one "keyword=value" combo
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* fGetToken() parse one token
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*
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*
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* from: kparse.c,v 4.5 89/01/21 17:20:39 jtkohl Exp $
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* $Id: kparse.c,v 1.3 1995/07/18 16:38:58 mark Exp $
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*/
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#if 0
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#ifndef lint
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static char rcsid[] =
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"$Id: kparse.c,v 1.3 1995/07/18 16:38:58 mark Exp $";
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#endif lint
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <kparse.h>
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#ifndef FALSE
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#define FALSE 0
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#define TRUE 1
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#endif
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#define MAXKEY 80
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#define MAXVALUE 80
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int fGetKeywordValue(FILE *fp, char *keyword, int klen, char *value, int vlen);
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int fGetToken(FILE *fp, char *dest, int maxlen);
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int fGetChar(FILE *fp);
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int fUngetChar(int ch, FILE*fp);
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int fGetLiteral(FILE *fp);;
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int LineNbr=1; /* current line nbr in parameter file */
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char ErrorMsg[80]; /* meaningful only when KV_SYNTAX, PS_SYNTAX,
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* or PS_BAD_KEYWORD is returned by
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* fGetKeywordValue or fGetParameterSet */
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int fGetParameterSet(FILE *fp, parmtable parm[], int parmcount )
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{
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int rc,i;
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char keyword[MAXKEY];
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char value[MAXVALUE];
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while (TRUE) {
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rc=fGetKeywordValue(fp,keyword,MAXKEY,value,MAXVALUE);
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switch (rc) {
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case KV_EOF:
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return(PS_EOF);
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case KV_EOL:
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return(PS_OKAY);
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case KV_SYNTAX:
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return(PS_SYNTAX);
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case KV_OKAY:
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/*
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* got a reasonable keyword/value pair. Search the
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* parameter table to see if we recognize the keyword; if
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* not, return an error. If we DO recognize it, make sure
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* it has not already been given. If not already given,
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* save the value.
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*/
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for (i=0; i<parmcount; i++) {
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if (strcmp(strutol(keyword),parm[i].keyword)==0) {
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if (parm[i].value) {
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sprintf(ErrorMsg,"duplicate keyword \"%s\" found",
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keyword);
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return(PS_BAD_KEYWORD);
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}
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parm[i].value = strsave( value );
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break;
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}
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}
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if (i >= parmcount) {
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sprintf(ErrorMsg, "unrecognized keyword \"%s\" found",
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keyword);
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return(PS_BAD_KEYWORD);
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}
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break;
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default:
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sprintf(ErrorMsg,
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"panic: bad return (%d) from fGetToken()",rc);
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break;
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}
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}
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}
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/*
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* Routine: ParmCompare
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*
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* Purpose:
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* ParmCompare checks a specified value for a particular keyword.
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* fails if keyword not found or keyword found but the value was
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* different. Like strcmp, ParmCompare returns 0 for a match found, -1
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* otherwise
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*/
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int ParmCompare(parmtable parm[], int parmcount, char *keyword, char *value )
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{
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int i;
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for (i=0; i<parmcount; i++) {
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if (strcmp(parm[i].keyword,keyword)==0) {
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if (parm[i].value) {
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return(strcmp(parm[i].value,value));
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} else {
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return(strcmp(parm[i].defvalue,value));
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}
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}
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}
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return(-1);
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}
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void FreeParameterSet(parmtable parm[], int parmcount)
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{
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int i;
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for (i=0; i<parmcount; i++) {
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if (parm[i].value) {
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free(parm[i].value);
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parm[i].value = (char *)NULL;
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}
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}
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}
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int fGetKeywordValue(FILE *fp, char *keyword, int klen, char *value, int vlen)
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{
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int rc;
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int gotit;
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*keyword = *value = '\0'; /* preset strings to NULL */
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/*
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* Looking for a keyword.
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* return an exception for EOF or BAD_QSTRING
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* ignore leading WHITEspace
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* ignore any number of leading commas
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* newline means we have all the parms for this
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* statement; give an indication that there is
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* nothing more on this line.
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* stop looking if we find QSTRING, STRING, or NUMBER
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* return syntax error for any other PUNKtuation
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*/
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gotit = FALSE;
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do {
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rc = fGetToken(fp,keyword,klen);
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switch (rc) {
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case GTOK_WHITE:
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break;
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case GTOK_EOF:
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return(KV_EOF);
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case GTOK_BAD_QSTRING:
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sprintf(ErrorMsg,"unterminated string \"%s found",keyword);
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return(KV_SYNTAX);
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case GTOK_PUNK:
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if (strcmp("\n",keyword)==0) {
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return(KV_EOL);
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} else if (strcmp(",",keyword)!=0) {
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sprintf(ErrorMsg,"expecting rvalue, found \'%s\'",keyword);
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}
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break;
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case GTOK_STRING:
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case GTOK_QSTRING:
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case GTOK_NUMBER:
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gotit = TRUE;
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break;
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default:
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sprintf(ErrorMsg,"panic: bad return (%d) from fGetToken()",rc);
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return(KV_SYNTAX);
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}
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} while (!gotit);
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/*
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* now we expect an equal sign.
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* skip any whitespace
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* stop looking if we find an equal sign
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* anything else causes a syntax error
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*/
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gotit = FALSE;
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do {
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rc = fGetToken(fp,value,vlen);
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switch (rc) {
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case GTOK_WHITE:
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break;
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case GTOK_BAD_QSTRING:
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sprintf(ErrorMsg,
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"expecting \'=\', found unterminated string \"%s",
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value);
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return(KV_SYNTAX);
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case GTOK_PUNK:
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if (strcmp("=",value)==0) {
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gotit = TRUE;
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} else {
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if (strcmp("\n",value)==0) {
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sprintf(ErrorMsg,"expecting \"=\", found newline");
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fUngetChar('\n',fp);
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} else {
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sprintf(ErrorMsg,
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"expecting rvalue, found \'%s\'",keyword);
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}
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return(KV_SYNTAX);
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}
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break;
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case GTOK_STRING:
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case GTOK_QSTRING:
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case GTOK_NUMBER:
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sprintf(ErrorMsg,"expecting \'=\', found \"%s\"",value);
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return(KV_SYNTAX);
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case GTOK_EOF:
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sprintf(ErrorMsg,"expecting \'=\', found EOF");
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return(KV_SYNTAX);
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default:
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sprintf(ErrorMsg,
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"panic: bad return (%d) from fGetToken()",rc);
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return(KV_SYNTAX);
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}
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} while ( !gotit );
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/*
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* got the keyword and equal sign, now get a value.
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* ignore any whitespace
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* any punctuation is a syntax error
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*/
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gotit = FALSE;
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do {
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rc = fGetToken(fp,value,vlen);
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switch (rc) {
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case GTOK_WHITE:
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break;
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case GTOK_EOF:
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sprintf(ErrorMsg,"expecting rvalue, found EOF");
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return(KV_SYNTAX);
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case GTOK_BAD_QSTRING:
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sprintf(ErrorMsg,"unterminated quoted string \"%s",value);
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return(KV_SYNTAX);
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case GTOK_PUNK:
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if (strcmp("\n",value)==0) {
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sprintf(ErrorMsg,"expecting rvalue, found newline");
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fUngetChar('\n',fp);
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} else {
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sprintf(ErrorMsg,
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"expecting rvalue, found \'%s\'",value);
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}
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return(KV_SYNTAX);
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break;
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case GTOK_STRING:
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case GTOK_QSTRING:
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case GTOK_NUMBER:
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gotit = TRUE;
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return(KV_OKAY);
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default:
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sprintf(ErrorMsg,
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"panic: bad return (%d) from fGetToken()",rc);
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return(KV_SYNTAX);
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}
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} while ( !gotit );
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/*NOTREACHED*/
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return 0; /* I know, I know. - markm */
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}
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/*
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* Routine Name: fGetToken
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*
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* Function: read the next token from the specified file.
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* A token is defined as a group of characters
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* terminated by a white space char (SPACE, CR,
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* LF, FF, TAB). The token returned is stripped of
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* both leading and trailing white space, and is
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* terminated by a NULL terminator. An alternate
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* definition of a token is a string enclosed in
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* single or double quotes.
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*
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* Explicit Parameters:
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* fp pointer to the input FILE
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* dest pointer to destination buffer
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* maxlen length of the destination buffer. The buffer
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* length INCLUDES the NULL terminator.
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*
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* Implicit Parameters: stderr where the "token too long" message goes
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*
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* External Procedures: fgetc
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*
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* Side Effects: None
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*
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* Return Value: A token classification value, as
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* defined in kparse.h. Note that the
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* classification for end of file is
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* always zero.
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*/
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int fGetToken(FILE *fp, char *dest, int maxlen)
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{
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int ch='\0';
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int len=0;
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char *p = dest;
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int digits;
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ch=fGetChar(fp);
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/*
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* check for a quoted string. If found, take all characters
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* that fit until a closing quote is found. Note that this
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* algorithm will not behave well for a string which is too long.
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*/
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if (ISQUOTE(ch)) {
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int done = FALSE;
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do {
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ch = fGetChar(fp);
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done = ((maxlen<++len)||ISLINEFEED(ch)||(ch==EOF)
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||ISQUOTE(ch));
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if (ch=='\\')
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ch = fGetLiteral(fp);
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if (!done)
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*p++ = ch;
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else if ((ch!=EOF) && !ISQUOTE(ch))
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fUngetChar(ch,fp);
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} while (!done);
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*p = '\0';
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if (ISLINEFEED(ch)) return(GTOK_BAD_QSTRING);
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return(GTOK_QSTRING);
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}
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/*
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* Not a quoted string. If its a token character (rules are
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* defined via the ISTOKENCHAR macro, in kparse.h) take it and all
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* token chars following it until we run out of space.
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*/
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digits=TRUE;
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if (ISTOKENCHAR(ch)) {
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while ( (ISTOKENCHAR(ch)) && len<maxlen-1 ) {
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if (!isdigit(ch)) digits=FALSE;
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*p++ = ch;
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len++;
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ch = fGetChar(fp);
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};
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*p = '\0';
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if (ch!=EOF) {
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fUngetChar(ch,fp);
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}
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if (digits) {
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return(GTOK_NUMBER);
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} else {
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return(GTOK_STRING);
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}
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}
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/*
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* Neither a quoted string nor a token character. Return a string
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* with just that one character in it.
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*/
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if (ch==EOF) {
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return(GTOK_EOF);
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}
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if (!ISWHITESPACE(ch)) {
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*p++ = ch;
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*p='\0';
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} else {
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*p++ = ' '; /* white space is always the
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* blank character */
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*p='\0';
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/*
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* The character is a white space. Flush all additional white
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* space.
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*/
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while (ISWHITESPACE(ch) && ((ch=fGetChar(fp)) != EOF))
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;
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if (ch!=EOF) {
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fUngetChar(ch,fp);
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}
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return(GTOK_WHITE);
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}
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return(GTOK_PUNK);
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}
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/*
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* fGetLiteral is called after we find a '\' in the input stream. A
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* string of numbers following the backslash are converted to the
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* appropriate value; hex (0xn), octal (0n), and decimal (otherwise)
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* are all supported. If the char after the \ is not a number, we
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* special case certain values (\n, \f, \r, \b) or return a literal
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* otherwise (useful for \", for example).
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*/
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int fGetLiteral(FILE *fp)
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{
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int ch;
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int n=0;
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int base;
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ch = fGetChar(fp);
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if (!isdigit(ch)) {
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switch (ch) {
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case 'n': return('\n');
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case 'f': return('\f');
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case 'r': return('\r');
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case 'b': return('\b');
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default: return(ch);
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}
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}
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/*
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* got a number. might be decimal (no prefix), octal (prefix 0),
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* or hexadecimal (prefix 0x). Set the base appropriately.
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*/
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if (ch!='0') {
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base=10; /* its a decimal number */
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} else {
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/*
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* found a zero, its either hex or octal
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*/
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ch = fGetChar(fp);
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if ((ch!='x') && (ch!='X')) {
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base=010;
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} else {
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ch = fGetChar(fp);
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base=0x10;
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}
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}
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switch (base) {
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case 010: /* octal */
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while (ISOCTAL(ch)) {
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n = (n*base) + ch - '0';
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ch = fGetChar(fp);
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}
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break;
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case 10: /* decimal */
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while (isdigit(ch)) {
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n = (n*base) + ch - '0';
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ch = fGetChar(fp);
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}
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break;
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case 0x10: /* hexadecimal */
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while (isxdigit(ch)) {
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if (isdigit(ch)) {
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n = (n*base) + ch - '0';
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} else {
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n = (n*base) + toupper(ch) - 'A' + 0xA ;
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}
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ch = fGetChar(fp);
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}
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break;
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default:
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fprintf(stderr,"fGetLiteral() died real bad. Fix gettoken.c.");
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exit(1);
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break;
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}
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fUngetChar(ch,fp);
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return(n);
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}
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|
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/*
|
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* exactly the same as ungetc(3) except that the line number of the
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* input file is maintained.
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*/
|
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int fUngetChar(int ch, FILE*fp)
|
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{
|
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if (ch=='\n') LineNbr--;
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return(ungetc(ch,fp));
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}
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|
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/*
|
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* exactly the same as fgetc(3) except that the line number of the
|
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* input file is maintained.
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*/
|
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int fGetChar(FILE *fp)
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{
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int ch = fgetc(fp);
|
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if (ch=='\n') LineNbr++;
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return(ch);
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}
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|
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/*
|
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* Routine Name: strsave
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*
|
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* Function: return a pointer to a saved copy of the
|
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* input string. the copy will be allocated
|
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* as large as necessary.
|
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*
|
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* Explicit Parameters: pointer to string to save
|
||
*
|
||
* Implicit Parameters: None
|
||
*
|
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* External Procedures: malloc,strcpy,strlen
|
||
*
|
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* Side Effects: None
|
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*
|
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* Return Value: pointer to copied string
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*
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*/
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char *strsave(char *p)
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{
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return(strcpy(malloc(strlen(p)+1),p));
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}
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|
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|
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/*
|
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* strutol changes all characters in a string to lower case, in place.
|
||
* the pointer to the beginning of the string is returned.
|
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*/
|
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|
||
char *strutol(char *start)
|
||
{
|
||
char *q;
|
||
for (q=start; *q; q++)
|
||
if (isupper(*q))
|
||
*q=tolower(*q);
|
||
return(start);
|
||
}
|
||
|
||
#ifdef GTOK_TEST /* mainline test routine for fGetToken() */
|
||
|
||
#define MAXTOKEN 100
|
||
|
||
char *pgm = "gettoken";
|
||
|
||
main(int argc, char **argv)
|
||
{
|
||
char *p;
|
||
int type;
|
||
FILE *fp;
|
||
|
||
if (--argc) {
|
||
fp = fopen(*++argv,"ra");
|
||
if (fp == (FILE *)NULL) {
|
||
fprintf(stderr,"can\'t open \"%s\"\n",*argv);
|
||
}
|
||
} else
|
||
fp = stdin;
|
||
|
||
p = malloc(MAXTOKEN);
|
||
while (type = fGetToken(fp,p,MAXTOKEN)) {
|
||
switch(type) {
|
||
case GTOK_BAD_QSTRING:
|
||
printf("BAD QSTRING!\t");
|
||
break;
|
||
case GTOK_EOF:
|
||
printf("EOF!\t");
|
||
break;
|
||
case GTOK_QSTRING:
|
||
printf("QSTRING\t");
|
||
break;
|
||
case GTOK_STRING:
|
||
printf("STRING\t");
|
||
break;
|
||
case GTOK_NUMBER:
|
||
printf("NUMBER\t");
|
||
break;
|
||
case GTOK_PUNK:
|
||
printf("PUNK\t");
|
||
break;
|
||
case GTOK_WHITE:
|
||
printf("WHITE\t");
|
||
break;
|
||
default:
|
||
printf("HUH?\t");
|
||
break;
|
||
}
|
||
if (*p=='\n')
|
||
printf("\\n\n");
|
||
else
|
||
printf("%s\n",p);
|
||
}
|
||
exit(0);
|
||
}
|
||
#endif
|
||
|
||
#ifdef KVTEST
|
||
|
||
main(int argc, char **argv)
|
||
{
|
||
int rc,ch;
|
||
FILE *fp;
|
||
char key[MAXKEY],valu[MAXVALUE];
|
||
char *filename;
|
||
|
||
if (argc != 2) {
|
||
fprintf(stderr,"usage: test <filename>\n");
|
||
exit(1);
|
||
}
|
||
|
||
if (!(fp=fopen(*++argv,"r"))) {
|
||
fprintf(stderr,"can\'t open input file \"%s\"\n",filename);
|
||
exit(1);
|
||
}
|
||
filename = *argv;
|
||
|
||
while ((rc=fGetKeywordValue(fp,key,MAXKEY,valu,MAXVALUE))!=KV_EOF){
|
||
|
||
switch (rc) {
|
||
|
||
case KV_EOL:
|
||
printf("%s, line %d: nada mas.\n",filename,LineNbr-1);
|
||
break;
|
||
|
||
case KV_SYNTAX:
|
||
printf("%s, line %d: syntax error: %s\n",
|
||
filename,LineNbr,ErrorMsg);
|
||
while ( ((ch=fGetChar(fp))!=EOF) && (ch!='\n') );
|
||
break;
|
||
|
||
case KV_OKAY:
|
||
printf("%s, line %d: okay, %s=\"%s\"\n",
|
||
filename,LineNbr,key,valu);
|
||
break;
|
||
|
||
default:
|
||
printf("panic: bad return (%d) from fGetKeywordValue\n",rc);
|
||
break;
|
||
}
|
||
}
|
||
printf("EOF");
|
||
fclose(fp);
|
||
exit(0);
|
||
}
|
||
#endif
|
||
|
||
#ifdef PSTEST
|
||
|
||
parmtable kparm[] = {
|
||
/* keyword, default, found value */
|
||
{ "user", "", (char *)NULL },
|
||
{ "realm", "Athena", (char *)NULL },
|
||
{ "instance", "", (char *)NULL }
|
||
};
|
||
|
||
main(int argc, char **argv)
|
||
{
|
||
int rc,i,ch;
|
||
FILE *fp;
|
||
char *filename;
|
||
|
||
if (argc != 2) {
|
||
fprintf(stderr,"usage: test <filename>\n");
|
||
exit(1);
|
||
}
|
||
|
||
if (!(fp=fopen(*++argv,"r"))) {
|
||
fprintf(stderr,"can\'t open input file \"%s\"\n",filename);
|
||
exit(1);
|
||
}
|
||
filename = *argv;
|
||
|
||
while ((rc=fGetParameterSet(fp,kparm,PARMCOUNT(kparm))) != PS_EOF) {
|
||
|
||
switch (rc) {
|
||
|
||
case PS_BAD_KEYWORD:
|
||
printf("%s, line %d: %s\n",filename,LineNbr,ErrorMsg);
|
||
while ( ((ch=fGetChar(fp))!=EOF) && (ch!='\n') );
|
||
break;
|
||
|
||
case PS_SYNTAX:
|
||
printf("%s, line %d: syntax error: %s\n",
|
||
filename,LineNbr,ErrorMsg);
|
||
while ( ((ch=fGetChar(fp))!=EOF) && (ch!='\n') );
|
||
break;
|
||
|
||
case PS_OKAY:
|
||
printf("%s, line %d: valid parameter set found:\n",
|
||
filename,LineNbr-1);
|
||
for (i=0; i<PARMCOUNT(kparm); i++) {
|
||
printf("\t%s = \"%s\"\n",kparm[i].keyword,
|
||
(kparm[i].value ? kparm[i].value
|
||
: kparm[i].defvalue));
|
||
}
|
||
break;
|
||
|
||
default:
|
||
printf("panic: bad return (%d) from fGetParameterSet\n",rc);
|
||
break;
|
||
}
|
||
FreeParameterSet(kparm,PARMCOUNT(kparm));
|
||
}
|
||
printf("EOF");
|
||
fclose(fp);
|
||
exit(0);
|
||
}
|
||
#endif
|