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      1 %{
      2 /* $NetBSD: cgdparse.y,v 1.7 2022/08/12 10:49:17 riastradh Exp $ */
      3 
      4 /*-
      5  * Copyright (c) 2003 The NetBSD Foundation, Inc.
      6  * All rights reserved.
      7  *
      8  * This code is derived from software contributed to The NetBSD Foundation
      9  * by Roland C. Dowdeswell.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 #ifndef lint
     35 __RCSID("$NetBSD: cgdparse.y,v 1.7 2022/08/12 10:49:17 riastradh Exp $");
     36 #endif
     37 
     38 #include <stdio.h>
     39 #include <stdlib.h>
     40 
     41 #include "params.h"
     42 #include "utils.h"
     43 #include "extern.h"
     44 
     45 static struct params *yy_global_params;
     46 
     47 %}
     48 %union {
     49 	int	 	 integer;
     50 	struct {
     51 		char	*text;
     52 		int	 length;
     53 	} token;
     54 	string_t	*string;
     55 	bits_t		*bits;
     56 	struct params	*params;
     57 	struct keygen	*keygen;
     58 }
     59 
     60 %type <params>	entry rules rule
     61 %type <keygen>	kgrule kgbody kgvars kgvar deprecated
     62 %type <string>	stringlit base64 intstr tokstr
     63 %type <bits>	bits
     64 %type <token>	token deptoken
     65 
     66 %token <integer> INTEGER
     67 %token <string> STRINGLIT
     68 
     69 %token <token> ALGORITHM KEYLENGTH IVMETHOD VERIFY_METHOD
     70 %token <token> KEYGEN SALT ITERATIONS MEMORY PARALLELISM VERSION KEY CMD SHARED
     71 %token <token> SUBKEY
     72 
     73 %token EOL
     74 
     75 /* Deprecated tokens */
     76 %token <token> KEYGEN_METHOD KEYGEN_SALT KEYGEN_ITERATIONS XOR_KEY
     77 
     78 %%
     79 
     80 entry:	  rules				{ yy_global_params = $$; }
     81 
     82 rules:	/* empty */			{ $$ = NULL; }
     83 	| rules rule			{ $$ = params_combine($$, $2); }
     84 
     85 rule:	  ALGORITHM stringlit EOL	{ $$ = params_algorithm($2); }
     86 	| KEYLENGTH INTEGER EOL		{ $$ = params_keylen($2); }
     87 	| IVMETHOD stringlit EOL	{ $$ = params_ivmeth($2); }
     88 	| VERIFY_METHOD stringlit EOL	{ $$ = params_verify_method($2); }
     89 	| kgrule			{ $$ = params_keygen($1); }
     90 	| deprecated			{ $$ = params_dep_keygen($1); }
     91 	| EOL				{ $$ = NULL; }
     92 
     93 kgrule:	  KEYGEN stringlit kgbody EOL	{ $$ = keygen_set_method($3, $2); }
     94 
     95 kgbody:	  kgvar				{ $$ = $1; }
     96 	| '{' kgvars '}'		{ $$ = $2; }
     97 
     98 kgvars: /* empty */			{ $$ = NULL; }
     99 	| kgvars kgvar			{ $$ = keygen_combine($$, $2); }
    100 
    101 kgvar:	  SALT bits EOL			{ $$ = keygen_salt($2); }
    102 	| ITERATIONS INTEGER EOL	{ $$ = keygen_iterations($2); }
    103 	| MEMORY INTEGER EOL		{ $$ = keygen_memory($2); }
    104 	| PARALLELISM INTEGER EOL	{ $$ = keygen_parallelism($2); }
    105 	| VERSION INTEGER EOL		{ $$ = keygen_version($2); }
    106 	| KEY bits EOL			{ $$ = keygen_key($2); }
    107 	| CMD stringlit EOL		{ $$ = keygen_cmd($2); }
    108 	| SHARED stringlit ALGORITHM stringlit SUBKEY bits EOL
    109 					{ $$ = keygen_shared($2, $4, $6); }
    110 	| EOL				{ $$ = NULL; }
    111 
    112 stringlit:  STRINGLIT | tokstr | intstr
    113 
    114 tokstr:	  token				{ $$ = string_new($1.text, $1.length); }
    115 
    116 token:	  ALGORITHM | KEYLENGTH
    117 	| IVMETHOD | VERIFY_METHOD
    118 	| KEYGEN | SALT | ITERATIONS
    119 	| KEY
    120 	| deptoken
    121 
    122 intstr:   INTEGER			{ $$ = string_fromint($1); }
    123 
    124 bits:	  base64			{ $$ = bits_decode_d($1); }
    125 
    126 base64:   stringlit
    127 	| base64 stringlit		{ $$ = string_add_d($1, $2); }
    128 
    129 /* The following rules are deprecated */
    130 
    131 deprecated:
    132 	  KEYGEN_METHOD stringlit EOL	{ $$ = keygen_method($2); }
    133 	| KEYGEN_SALT bits EOL		{ $$ = keygen_salt($2); }
    134 	| KEYGEN_ITERATIONS INTEGER EOL	{ $$ = keygen_iterations($2); }
    135 	| XOR_KEY bits EOL		{ $$ = keygen_key($2); }
    136 
    137 deptoken: KEYGEN_METHOD | KEYGEN_SALT
    138 	| KEYGEN_ITERATIONS | XOR_KEY
    139 
    140 %%
    141 
    142 struct params *
    143 cgdparsefile(FILE *f)
    144 {
    145 
    146 	yyin = f;
    147 	yy_global_params = NULL;
    148 	if (yyparse()) {
    149 		fprintf(stderr, "%s: failed to parse parameters file\n",
    150 		    getprogname());
    151 		params_free(yy_global_params);
    152 		return NULL;
    153 	}
    154 	return yy_global_params;
    155 }
    156