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![Colin Ian King](/assets/img/avatar_default.png)
The check for a failed open on headername is incorrectly checking on the out FILE pointer rather than the hdr. Fix this. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: David Howells <dhowells@redhat.com>
1615 lines
36 KiB
C
1615 lines
36 KiB
C
/* Simplified ASN.1 notation parser
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*
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* Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <linux/asn1_ber_bytecode.h>
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enum token_type {
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DIRECTIVE_ABSENT,
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DIRECTIVE_ALL,
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DIRECTIVE_ANY,
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DIRECTIVE_APPLICATION,
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DIRECTIVE_AUTOMATIC,
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DIRECTIVE_BEGIN,
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DIRECTIVE_BIT,
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DIRECTIVE_BMPString,
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DIRECTIVE_BOOLEAN,
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DIRECTIVE_BY,
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DIRECTIVE_CHARACTER,
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DIRECTIVE_CHOICE,
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DIRECTIVE_CLASS,
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DIRECTIVE_COMPONENT,
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DIRECTIVE_COMPONENTS,
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DIRECTIVE_CONSTRAINED,
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DIRECTIVE_CONTAINING,
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DIRECTIVE_DEFAULT,
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DIRECTIVE_DEFINED,
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DIRECTIVE_DEFINITIONS,
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DIRECTIVE_EMBEDDED,
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DIRECTIVE_ENCODED,
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DIRECTIVE_ENCODING_CONTROL,
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DIRECTIVE_END,
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DIRECTIVE_ENUMERATED,
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DIRECTIVE_EXCEPT,
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DIRECTIVE_EXPLICIT,
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DIRECTIVE_EXPORTS,
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DIRECTIVE_EXTENSIBILITY,
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DIRECTIVE_EXTERNAL,
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DIRECTIVE_FALSE,
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DIRECTIVE_FROM,
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DIRECTIVE_GeneralString,
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DIRECTIVE_GeneralizedTime,
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DIRECTIVE_GraphicString,
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DIRECTIVE_IA5String,
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DIRECTIVE_IDENTIFIER,
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DIRECTIVE_IMPLICIT,
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DIRECTIVE_IMPLIED,
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DIRECTIVE_IMPORTS,
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DIRECTIVE_INCLUDES,
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DIRECTIVE_INSTANCE,
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DIRECTIVE_INSTRUCTIONS,
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DIRECTIVE_INTEGER,
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DIRECTIVE_INTERSECTION,
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DIRECTIVE_ISO646String,
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DIRECTIVE_MAX,
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DIRECTIVE_MIN,
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DIRECTIVE_MINUS_INFINITY,
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DIRECTIVE_NULL,
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DIRECTIVE_NumericString,
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DIRECTIVE_OBJECT,
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DIRECTIVE_OCTET,
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DIRECTIVE_OF,
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DIRECTIVE_OPTIONAL,
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DIRECTIVE_ObjectDescriptor,
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DIRECTIVE_PATTERN,
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DIRECTIVE_PDV,
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DIRECTIVE_PLUS_INFINITY,
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DIRECTIVE_PRESENT,
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DIRECTIVE_PRIVATE,
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DIRECTIVE_PrintableString,
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DIRECTIVE_REAL,
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DIRECTIVE_RELATIVE_OID,
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DIRECTIVE_SEQUENCE,
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DIRECTIVE_SET,
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DIRECTIVE_SIZE,
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DIRECTIVE_STRING,
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DIRECTIVE_SYNTAX,
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DIRECTIVE_T61String,
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DIRECTIVE_TAGS,
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DIRECTIVE_TRUE,
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DIRECTIVE_TeletexString,
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DIRECTIVE_UNION,
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DIRECTIVE_UNIQUE,
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DIRECTIVE_UNIVERSAL,
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DIRECTIVE_UTCTime,
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DIRECTIVE_UTF8String,
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DIRECTIVE_UniversalString,
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DIRECTIVE_VideotexString,
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DIRECTIVE_VisibleString,
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DIRECTIVE_WITH,
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NR__DIRECTIVES,
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TOKEN_ASSIGNMENT = NR__DIRECTIVES,
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TOKEN_OPEN_CURLY,
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TOKEN_CLOSE_CURLY,
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TOKEN_OPEN_SQUARE,
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TOKEN_CLOSE_SQUARE,
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TOKEN_OPEN_ACTION,
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TOKEN_CLOSE_ACTION,
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TOKEN_COMMA,
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TOKEN_NUMBER,
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TOKEN_TYPE_NAME,
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TOKEN_ELEMENT_NAME,
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NR__TOKENS
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};
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static const unsigned char token_to_tag[NR__TOKENS] = {
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/* EOC goes first */
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[DIRECTIVE_BOOLEAN] = ASN1_BOOL,
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[DIRECTIVE_INTEGER] = ASN1_INT,
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[DIRECTIVE_BIT] = ASN1_BTS,
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[DIRECTIVE_OCTET] = ASN1_OTS,
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[DIRECTIVE_NULL] = ASN1_NULL,
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[DIRECTIVE_OBJECT] = ASN1_OID,
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[DIRECTIVE_ObjectDescriptor] = ASN1_ODE,
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[DIRECTIVE_EXTERNAL] = ASN1_EXT,
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[DIRECTIVE_REAL] = ASN1_REAL,
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[DIRECTIVE_ENUMERATED] = ASN1_ENUM,
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[DIRECTIVE_EMBEDDED] = 0,
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[DIRECTIVE_UTF8String] = ASN1_UTF8STR,
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[DIRECTIVE_RELATIVE_OID] = ASN1_RELOID,
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/* 14 */
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/* 15 */
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[DIRECTIVE_SEQUENCE] = ASN1_SEQ,
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[DIRECTIVE_SET] = ASN1_SET,
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[DIRECTIVE_NumericString] = ASN1_NUMSTR,
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[DIRECTIVE_PrintableString] = ASN1_PRNSTR,
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[DIRECTIVE_T61String] = ASN1_TEXSTR,
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[DIRECTIVE_TeletexString] = ASN1_TEXSTR,
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[DIRECTIVE_VideotexString] = ASN1_VIDSTR,
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[DIRECTIVE_IA5String] = ASN1_IA5STR,
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[DIRECTIVE_UTCTime] = ASN1_UNITIM,
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[DIRECTIVE_GeneralizedTime] = ASN1_GENTIM,
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[DIRECTIVE_GraphicString] = ASN1_GRASTR,
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[DIRECTIVE_VisibleString] = ASN1_VISSTR,
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[DIRECTIVE_GeneralString] = ASN1_GENSTR,
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[DIRECTIVE_UniversalString] = ASN1_UNITIM,
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[DIRECTIVE_CHARACTER] = ASN1_CHRSTR,
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[DIRECTIVE_BMPString] = ASN1_BMPSTR,
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};
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static const char asn1_classes[4][5] = {
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[ASN1_UNIV] = "UNIV",
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[ASN1_APPL] = "APPL",
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[ASN1_CONT] = "CONT",
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[ASN1_PRIV] = "PRIV"
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};
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static const char asn1_methods[2][5] = {
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[ASN1_UNIV] = "PRIM",
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[ASN1_APPL] = "CONS"
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};
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static const char *const asn1_universal_tags[32] = {
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"EOC",
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"BOOL",
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"INT",
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"BTS",
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"OTS",
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"NULL",
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"OID",
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"ODE",
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"EXT",
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"REAL",
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"ENUM",
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"EPDV",
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"UTF8STR",
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"RELOID",
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NULL, /* 14 */
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NULL, /* 15 */
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"SEQ",
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"SET",
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"NUMSTR",
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"PRNSTR",
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"TEXSTR",
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"VIDSTR",
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"IA5STR",
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"UNITIM",
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"GENTIM",
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"GRASTR",
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"VISSTR",
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"GENSTR",
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"UNISTR",
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"CHRSTR",
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"BMPSTR",
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NULL /* 31 */
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};
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static const char *filename;
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static const char *grammar_name;
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static const char *outputname;
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static const char *headername;
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static const char *const directives[NR__DIRECTIVES] = {
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#define _(X) [DIRECTIVE_##X] = #X
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_(ABSENT),
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_(ALL),
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_(ANY),
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_(APPLICATION),
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_(AUTOMATIC),
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_(BEGIN),
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_(BIT),
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_(BMPString),
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_(BOOLEAN),
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_(BY),
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_(CHARACTER),
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_(CHOICE),
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_(CLASS),
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_(COMPONENT),
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_(COMPONENTS),
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_(CONSTRAINED),
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_(CONTAINING),
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_(DEFAULT),
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_(DEFINED),
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_(DEFINITIONS),
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_(EMBEDDED),
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_(ENCODED),
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[DIRECTIVE_ENCODING_CONTROL] = "ENCODING-CONTROL",
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_(END),
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_(ENUMERATED),
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_(EXCEPT),
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_(EXPLICIT),
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_(EXPORTS),
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_(EXTENSIBILITY),
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_(EXTERNAL),
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_(FALSE),
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_(FROM),
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_(GeneralString),
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_(GeneralizedTime),
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_(GraphicString),
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_(IA5String),
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_(IDENTIFIER),
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_(IMPLICIT),
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_(IMPLIED),
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_(IMPORTS),
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_(INCLUDES),
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_(INSTANCE),
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_(INSTRUCTIONS),
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_(INTEGER),
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_(INTERSECTION),
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_(ISO646String),
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_(MAX),
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_(MIN),
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[DIRECTIVE_MINUS_INFINITY] = "MINUS-INFINITY",
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[DIRECTIVE_NULL] = "NULL",
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_(NumericString),
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_(OBJECT),
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_(OCTET),
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_(OF),
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_(OPTIONAL),
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_(ObjectDescriptor),
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_(PATTERN),
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_(PDV),
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[DIRECTIVE_PLUS_INFINITY] = "PLUS-INFINITY",
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_(PRESENT),
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_(PRIVATE),
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_(PrintableString),
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_(REAL),
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[DIRECTIVE_RELATIVE_OID] = "RELATIVE-OID",
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_(SEQUENCE),
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_(SET),
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_(SIZE),
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_(STRING),
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_(SYNTAX),
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_(T61String),
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_(TAGS),
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_(TRUE),
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_(TeletexString),
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_(UNION),
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_(UNIQUE),
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_(UNIVERSAL),
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_(UTCTime),
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_(UTF8String),
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_(UniversalString),
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_(VideotexString),
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_(VisibleString),
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_(WITH)
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};
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struct action {
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struct action *next;
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char *name;
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unsigned char index;
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};
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static struct action *action_list;
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static unsigned nr_actions;
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struct token {
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unsigned short line;
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enum token_type token_type : 8;
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unsigned char size;
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struct action *action;
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char *content;
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struct type *type;
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};
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static struct token *token_list;
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static unsigned nr_tokens;
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static bool verbose_opt;
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static bool debug_opt;
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#define verbose(fmt, ...) do { if (verbose_opt) printf(fmt, ## __VA_ARGS__); } while (0)
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#define debug(fmt, ...) do { if (debug_opt) printf(fmt, ## __VA_ARGS__); } while (0)
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static int directive_compare(const void *_key, const void *_pdir)
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{
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const struct token *token = _key;
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const char *const *pdir = _pdir, *dir = *pdir;
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size_t dlen, clen;
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int val;
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dlen = strlen(dir);
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clen = (dlen < token->size) ? dlen : token->size;
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//debug("cmp(%s,%s) = ", token->content, dir);
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val = memcmp(token->content, dir, clen);
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if (val != 0) {
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//debug("%d [cmp]\n", val);
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return val;
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}
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if (dlen == token->size) {
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//debug("0\n");
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return 0;
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}
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//debug("%d\n", (int)dlen - (int)token->size);
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return dlen - token->size; /* shorter -> negative */
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}
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/*
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* Tokenise an ASN.1 grammar
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*/
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static void tokenise(char *buffer, char *end)
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{
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struct token *tokens;
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char *line, *nl, *start, *p, *q;
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unsigned tix, lineno;
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/* Assume we're going to have half as many tokens as we have
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* characters
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*/
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token_list = tokens = calloc((end - buffer) / 2, sizeof(struct token));
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if (!tokens) {
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perror(NULL);
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exit(1);
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}
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tix = 0;
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lineno = 0;
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while (buffer < end) {
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/* First of all, break out a line */
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lineno++;
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line = buffer;
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nl = memchr(line, '\n', end - buffer);
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if (!nl) {
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buffer = nl = end;
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} else {
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buffer = nl + 1;
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*nl = '\0';
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}
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/* Remove "--" comments */
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p = line;
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next_comment:
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while ((p = memchr(p, '-', nl - p))) {
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if (p[1] == '-') {
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/* Found a comment; see if there's a terminator */
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q = p + 2;
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while ((q = memchr(q, '-', nl - q))) {
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if (q[1] == '-') {
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/* There is - excise the comment */
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q += 2;
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memmove(p, q, nl - q);
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goto next_comment;
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}
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q++;
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}
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*p = '\0';
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nl = p;
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break;
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} else {
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p++;
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}
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}
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p = line;
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while (p < nl) {
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/* Skip white space */
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while (p < nl && isspace(*p))
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*(p++) = 0;
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if (p >= nl)
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break;
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tokens[tix].line = lineno;
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start = p;
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/* Handle string tokens */
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if (isalpha(*p)) {
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const char **dir, *start = p;
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/* Can be a directive, type name or element
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* name. Find the end of the name.
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*/
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q = p + 1;
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while (q < nl && (isalnum(*q) || *q == '-' || *q == '_'))
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q++;
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tokens[tix].size = q - p;
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p = q;
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tokens[tix].content = malloc(tokens[tix].size + 1);
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if (!tokens[tix].content) {
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perror(NULL);
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exit(1);
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}
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memcpy(tokens[tix].content, start, tokens[tix].size);
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tokens[tix].content[tokens[tix].size] = 0;
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/* If it begins with a lowercase letter then
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* it's an element name
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*/
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if (islower(tokens[tix].content[0])) {
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tokens[tix++].token_type = TOKEN_ELEMENT_NAME;
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continue;
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}
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/* Otherwise we need to search the directive
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* table
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*/
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dir = bsearch(&tokens[tix], directives,
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sizeof(directives) / sizeof(directives[1]),
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sizeof(directives[1]),
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directive_compare);
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if (dir) {
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tokens[tix++].token_type = dir - directives;
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continue;
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}
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tokens[tix++].token_type = TOKEN_TYPE_NAME;
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continue;
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}
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/* Handle numbers */
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if (isdigit(*p)) {
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/* Find the end of the number */
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q = p + 1;
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while (q < nl && (isdigit(*q)))
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q++;
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tokens[tix].size = q - p;
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p = q;
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tokens[tix].content = malloc(tokens[tix].size + 1);
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if (!tokens[tix].content) {
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perror(NULL);
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exit(1);
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}
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memcpy(tokens[tix].content, start, tokens[tix].size);
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tokens[tix].content[tokens[tix].size] = 0;
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tokens[tix++].token_type = TOKEN_NUMBER;
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continue;
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}
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|
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if (nl - p >= 3) {
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if (memcmp(p, "::=", 3) == 0) {
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p += 3;
|
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tokens[tix].size = 3;
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tokens[tix].content = "::=";
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tokens[tix++].token_type = TOKEN_ASSIGNMENT;
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continue;
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}
|
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}
|
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|
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if (nl - p >= 2) {
|
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if (memcmp(p, "({", 2) == 0) {
|
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p += 2;
|
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tokens[tix].size = 2;
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tokens[tix].content = "({";
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tokens[tix++].token_type = TOKEN_OPEN_ACTION;
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continue;
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}
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if (memcmp(p, "})", 2) == 0) {
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p += 2;
|
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tokens[tix].size = 2;
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tokens[tix].content = "})";
|
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tokens[tix++].token_type = TOKEN_CLOSE_ACTION;
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continue;
|
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}
|
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}
|
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|
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if (nl - p >= 1) {
|
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tokens[tix].size = 1;
|
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switch (*p) {
|
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case '{':
|
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p += 1;
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tokens[tix].content = "{";
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tokens[tix++].token_type = TOKEN_OPEN_CURLY;
|
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continue;
|
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case '}':
|
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p += 1;
|
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tokens[tix].content = "}";
|
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tokens[tix++].token_type = TOKEN_CLOSE_CURLY;
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continue;
|
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case '[':
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p += 1;
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tokens[tix].content = "[";
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tokens[tix++].token_type = TOKEN_OPEN_SQUARE;
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continue;
|
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case ']':
|
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p += 1;
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tokens[tix].content = "]";
|
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tokens[tix++].token_type = TOKEN_CLOSE_SQUARE;
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continue;
|
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case ',':
|
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p += 1;
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tokens[tix].content = ",";
|
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tokens[tix++].token_type = TOKEN_COMMA;
|
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continue;
|
|
default:
|
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break;
|
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}
|
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}
|
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|
|
fprintf(stderr, "%s:%u: Unknown character in grammar: '%c'\n",
|
|
filename, lineno, *p);
|
|
exit(1);
|
|
}
|
|
}
|
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|
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nr_tokens = tix;
|
|
verbose("Extracted %u tokens\n", nr_tokens);
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|
|
#if 0
|
|
{
|
|
int n;
|
|
for (n = 0; n < nr_tokens; n++)
|
|
debug("Token %3u: '%s'\n", n, token_list[n].content);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void build_type_list(void);
|
|
static void parse(void);
|
|
static void dump_elements(void);
|
|
static void render(FILE *out, FILE *hdr);
|
|
|
|
/*
|
|
*
|
|
*/
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct stat st;
|
|
ssize_t readlen;
|
|
FILE *out, *hdr;
|
|
char *buffer, *p;
|
|
char *kbuild_verbose;
|
|
int fd;
|
|
|
|
kbuild_verbose = getenv("KBUILD_VERBOSE");
|
|
if (kbuild_verbose)
|
|
verbose_opt = atoi(kbuild_verbose);
|
|
|
|
while (argc > 4) {
|
|
if (strcmp(argv[1], "-v") == 0)
|
|
verbose_opt = true;
|
|
else if (strcmp(argv[1], "-d") == 0)
|
|
debug_opt = true;
|
|
else
|
|
break;
|
|
memmove(&argv[1], &argv[2], (argc - 2) * sizeof(char *));
|
|
argc--;
|
|
}
|
|
|
|
if (argc != 4) {
|
|
fprintf(stderr, "Format: %s [-v] [-d] <grammar-file> <c-file> <hdr-file>\n",
|
|
argv[0]);
|
|
exit(2);
|
|
}
|
|
|
|
filename = argv[1];
|
|
outputname = argv[2];
|
|
headername = argv[3];
|
|
|
|
fd = open(filename, O_RDONLY);
|
|
if (fd < 0) {
|
|
perror(filename);
|
|
exit(1);
|
|
}
|
|
|
|
if (fstat(fd, &st) < 0) {
|
|
perror(filename);
|
|
exit(1);
|
|
}
|
|
|
|
if (!(buffer = malloc(st.st_size + 1))) {
|
|
perror(NULL);
|
|
exit(1);
|
|
}
|
|
|
|
if ((readlen = read(fd, buffer, st.st_size)) < 0) {
|
|
perror(filename);
|
|
exit(1);
|
|
}
|
|
|
|
if (close(fd) < 0) {
|
|
perror(filename);
|
|
exit(1);
|
|
}
|
|
|
|
if (readlen != st.st_size) {
|
|
fprintf(stderr, "%s: Short read\n", filename);
|
|
exit(1);
|
|
}
|
|
|
|
p = strrchr(argv[1], '/');
|
|
p = p ? p + 1 : argv[1];
|
|
grammar_name = strdup(p);
|
|
if (!p) {
|
|
perror(NULL);
|
|
exit(1);
|
|
}
|
|
p = strchr(grammar_name, '.');
|
|
if (p)
|
|
*p = '\0';
|
|
|
|
buffer[readlen] = 0;
|
|
tokenise(buffer, buffer + readlen);
|
|
build_type_list();
|
|
parse();
|
|
dump_elements();
|
|
|
|
out = fopen(outputname, "w");
|
|
if (!out) {
|
|
perror(outputname);
|
|
exit(1);
|
|
}
|
|
|
|
hdr = fopen(headername, "w");
|
|
if (!hdr) {
|
|
perror(headername);
|
|
exit(1);
|
|
}
|
|
|
|
render(out, hdr);
|
|
|
|
if (fclose(out) < 0) {
|
|
perror(outputname);
|
|
exit(1);
|
|
}
|
|
|
|
if (fclose(hdr) < 0) {
|
|
perror(headername);
|
|
exit(1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
enum compound {
|
|
NOT_COMPOUND,
|
|
SET,
|
|
SET_OF,
|
|
SEQUENCE,
|
|
SEQUENCE_OF,
|
|
CHOICE,
|
|
ANY,
|
|
TYPE_REF,
|
|
TAG_OVERRIDE
|
|
};
|
|
|
|
struct element {
|
|
struct type *type_def;
|
|
struct token *name;
|
|
struct token *type;
|
|
struct action *action;
|
|
struct element *children;
|
|
struct element *next;
|
|
struct element *render_next;
|
|
struct element *list_next;
|
|
uint8_t n_elements;
|
|
enum compound compound : 8;
|
|
enum asn1_class class : 8;
|
|
enum asn1_method method : 8;
|
|
uint8_t tag;
|
|
unsigned entry_index;
|
|
unsigned flags;
|
|
#define ELEMENT_IMPLICIT 0x0001
|
|
#define ELEMENT_EXPLICIT 0x0002
|
|
#define ELEMENT_TAG_SPECIFIED 0x0004
|
|
#define ELEMENT_RENDERED 0x0008
|
|
#define ELEMENT_SKIPPABLE 0x0010
|
|
#define ELEMENT_CONDITIONAL 0x0020
|
|
};
|
|
|
|
struct type {
|
|
struct token *name;
|
|
struct token *def;
|
|
struct element *element;
|
|
unsigned ref_count;
|
|
unsigned flags;
|
|
#define TYPE_STOP_MARKER 0x0001
|
|
#define TYPE_BEGIN 0x0002
|
|
};
|
|
|
|
static struct type *type_list;
|
|
static struct type **type_index;
|
|
static unsigned nr_types;
|
|
|
|
static int type_index_compare(const void *_a, const void *_b)
|
|
{
|
|
const struct type *const *a = _a, *const *b = _b;
|
|
|
|
if ((*a)->name->size != (*b)->name->size)
|
|
return (*a)->name->size - (*b)->name->size;
|
|
else
|
|
return memcmp((*a)->name->content, (*b)->name->content,
|
|
(*a)->name->size);
|
|
}
|
|
|
|
static int type_finder(const void *_key, const void *_ti)
|
|
{
|
|
const struct token *token = _key;
|
|
const struct type *const *ti = _ti;
|
|
const struct type *type = *ti;
|
|
|
|
if (token->size != type->name->size)
|
|
return token->size - type->name->size;
|
|
else
|
|
return memcmp(token->content, type->name->content,
|
|
token->size);
|
|
}
|
|
|
|
/*
|
|
* Build up a list of types and a sorted index to that list.
|
|
*/
|
|
static void build_type_list(void)
|
|
{
|
|
struct type *types;
|
|
unsigned nr, t, n;
|
|
|
|
nr = 0;
|
|
for (n = 0; n < nr_tokens - 1; n++)
|
|
if (token_list[n + 0].token_type == TOKEN_TYPE_NAME &&
|
|
token_list[n + 1].token_type == TOKEN_ASSIGNMENT)
|
|
nr++;
|
|
|
|
if (nr == 0) {
|
|
fprintf(stderr, "%s: No defined types\n", filename);
|
|
exit(1);
|
|
}
|
|
|
|
nr_types = nr;
|
|
types = type_list = calloc(nr + 1, sizeof(type_list[0]));
|
|
if (!type_list) {
|
|
perror(NULL);
|
|
exit(1);
|
|
}
|
|
type_index = calloc(nr, sizeof(type_index[0]));
|
|
if (!type_index) {
|
|
perror(NULL);
|
|
exit(1);
|
|
}
|
|
|
|
t = 0;
|
|
types[t].flags |= TYPE_BEGIN;
|
|
for (n = 0; n < nr_tokens - 1; n++) {
|
|
if (token_list[n + 0].token_type == TOKEN_TYPE_NAME &&
|
|
token_list[n + 1].token_type == TOKEN_ASSIGNMENT) {
|
|
types[t].name = &token_list[n];
|
|
type_index[t] = &types[t];
|
|
t++;
|
|
}
|
|
}
|
|
types[t].name = &token_list[n + 1];
|
|
types[t].flags |= TYPE_STOP_MARKER;
|
|
|
|
qsort(type_index, nr, sizeof(type_index[0]), type_index_compare);
|
|
|
|
verbose("Extracted %u types\n", nr_types);
|
|
#if 0
|
|
for (n = 0; n < nr_types; n++) {
|
|
struct type *type = type_index[n];
|
|
debug("- %*.*s\n", type->name->content);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static struct element *parse_type(struct token **_cursor, struct token *stop,
|
|
struct token *name);
|
|
|
|
/*
|
|
* Parse the token stream
|
|
*/
|
|
static void parse(void)
|
|
{
|
|
struct token *cursor;
|
|
struct type *type;
|
|
|
|
/* Parse one type definition statement at a time */
|
|
type = type_list;
|
|
do {
|
|
cursor = type->name;
|
|
|
|
if (cursor[0].token_type != TOKEN_TYPE_NAME ||
|
|
cursor[1].token_type != TOKEN_ASSIGNMENT)
|
|
abort();
|
|
cursor += 2;
|
|
|
|
type->element = parse_type(&cursor, type[1].name, NULL);
|
|
type->element->type_def = type;
|
|
|
|
if (cursor != type[1].name) {
|
|
fprintf(stderr, "%s:%d: Parse error at token '%s'\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
}
|
|
|
|
} while (type++, !(type->flags & TYPE_STOP_MARKER));
|
|
|
|
verbose("Extracted %u actions\n", nr_actions);
|
|
}
|
|
|
|
static struct element *element_list;
|
|
|
|
static struct element *alloc_elem(struct token *type)
|
|
{
|
|
struct element *e = calloc(1, sizeof(*e));
|
|
if (!e) {
|
|
perror(NULL);
|
|
exit(1);
|
|
}
|
|
e->list_next = element_list;
|
|
element_list = e;
|
|
return e;
|
|
}
|
|
|
|
static struct element *parse_compound(struct token **_cursor, struct token *end,
|
|
int alternates);
|
|
|
|
/*
|
|
* Parse one type definition statement
|
|
*/
|
|
static struct element *parse_type(struct token **_cursor, struct token *end,
|
|
struct token *name)
|
|
{
|
|
struct element *top, *element;
|
|
struct action *action, **ppaction;
|
|
struct token *cursor = *_cursor;
|
|
struct type **ref;
|
|
char *p;
|
|
int labelled = 0, implicit = 0;
|
|
|
|
top = element = alloc_elem(cursor);
|
|
element->class = ASN1_UNIV;
|
|
element->method = ASN1_PRIM;
|
|
element->tag = token_to_tag[cursor->token_type];
|
|
element->name = name;
|
|
|
|
/* Extract the tag value if one given */
|
|
if (cursor->token_type == TOKEN_OPEN_SQUARE) {
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
switch (cursor->token_type) {
|
|
case DIRECTIVE_UNIVERSAL:
|
|
element->class = ASN1_UNIV;
|
|
cursor++;
|
|
break;
|
|
case DIRECTIVE_APPLICATION:
|
|
element->class = ASN1_APPL;
|
|
cursor++;
|
|
break;
|
|
case TOKEN_NUMBER:
|
|
element->class = ASN1_CONT;
|
|
break;
|
|
case DIRECTIVE_PRIVATE:
|
|
element->class = ASN1_PRIV;
|
|
cursor++;
|
|
break;
|
|
default:
|
|
fprintf(stderr, "%s:%d: Unrecognised tag class token '%s'\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
}
|
|
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
if (cursor->token_type != TOKEN_NUMBER) {
|
|
fprintf(stderr, "%s:%d: Missing tag number '%s'\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
}
|
|
|
|
element->tag &= ~0x1f;
|
|
element->tag |= strtoul(cursor->content, &p, 10);
|
|
element->flags |= ELEMENT_TAG_SPECIFIED;
|
|
if (p - cursor->content != cursor->size)
|
|
abort();
|
|
cursor++;
|
|
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
if (cursor->token_type != TOKEN_CLOSE_SQUARE) {
|
|
fprintf(stderr, "%s:%d: Missing closing square bracket '%s'\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
}
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
labelled = 1;
|
|
}
|
|
|
|
/* Handle implicit and explicit markers */
|
|
if (cursor->token_type == DIRECTIVE_IMPLICIT) {
|
|
element->flags |= ELEMENT_IMPLICIT;
|
|
implicit = 1;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
} else if (cursor->token_type == DIRECTIVE_EXPLICIT) {
|
|
element->flags |= ELEMENT_EXPLICIT;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
}
|
|
|
|
if (labelled) {
|
|
if (!implicit)
|
|
element->method |= ASN1_CONS;
|
|
element->compound = implicit ? TAG_OVERRIDE : SEQUENCE;
|
|
element->children = alloc_elem(cursor);
|
|
element = element->children;
|
|
element->class = ASN1_UNIV;
|
|
element->method = ASN1_PRIM;
|
|
element->tag = token_to_tag[cursor->token_type];
|
|
element->name = name;
|
|
}
|
|
|
|
/* Extract the type we're expecting here */
|
|
element->type = cursor;
|
|
switch (cursor->token_type) {
|
|
case DIRECTIVE_ANY:
|
|
element->compound = ANY;
|
|
cursor++;
|
|
break;
|
|
|
|
case DIRECTIVE_NULL:
|
|
case DIRECTIVE_BOOLEAN:
|
|
case DIRECTIVE_ENUMERATED:
|
|
case DIRECTIVE_INTEGER:
|
|
element->compound = NOT_COMPOUND;
|
|
cursor++;
|
|
break;
|
|
|
|
case DIRECTIVE_EXTERNAL:
|
|
element->method = ASN1_CONS;
|
|
|
|
case DIRECTIVE_BMPString:
|
|
case DIRECTIVE_GeneralString:
|
|
case DIRECTIVE_GraphicString:
|
|
case DIRECTIVE_IA5String:
|
|
case DIRECTIVE_ISO646String:
|
|
case DIRECTIVE_NumericString:
|
|
case DIRECTIVE_PrintableString:
|
|
case DIRECTIVE_T61String:
|
|
case DIRECTIVE_TeletexString:
|
|
case DIRECTIVE_UniversalString:
|
|
case DIRECTIVE_UTF8String:
|
|
case DIRECTIVE_VideotexString:
|
|
case DIRECTIVE_VisibleString:
|
|
case DIRECTIVE_ObjectDescriptor:
|
|
case DIRECTIVE_GeneralizedTime:
|
|
case DIRECTIVE_UTCTime:
|
|
element->compound = NOT_COMPOUND;
|
|
cursor++;
|
|
break;
|
|
|
|
case DIRECTIVE_BIT:
|
|
case DIRECTIVE_OCTET:
|
|
element->compound = NOT_COMPOUND;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
if (cursor->token_type != DIRECTIVE_STRING)
|
|
goto parse_error;
|
|
cursor++;
|
|
break;
|
|
|
|
case DIRECTIVE_OBJECT:
|
|
element->compound = NOT_COMPOUND;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
if (cursor->token_type != DIRECTIVE_IDENTIFIER)
|
|
goto parse_error;
|
|
cursor++;
|
|
break;
|
|
|
|
case TOKEN_TYPE_NAME:
|
|
element->compound = TYPE_REF;
|
|
ref = bsearch(cursor, type_index, nr_types, sizeof(type_index[0]),
|
|
type_finder);
|
|
if (!ref) {
|
|
fprintf(stderr, "%s:%d: Type '%s' undefined\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
}
|
|
cursor->type = *ref;
|
|
(*ref)->ref_count++;
|
|
cursor++;
|
|
break;
|
|
|
|
case DIRECTIVE_CHOICE:
|
|
element->compound = CHOICE;
|
|
cursor++;
|
|
element->children = parse_compound(&cursor, end, 1);
|
|
break;
|
|
|
|
case DIRECTIVE_SEQUENCE:
|
|
element->compound = SEQUENCE;
|
|
element->method = ASN1_CONS;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
if (cursor->token_type == DIRECTIVE_OF) {
|
|
element->compound = SEQUENCE_OF;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
element->children = parse_type(&cursor, end, NULL);
|
|
} else {
|
|
element->children = parse_compound(&cursor, end, 0);
|
|
}
|
|
break;
|
|
|
|
case DIRECTIVE_SET:
|
|
element->compound = SET;
|
|
element->method = ASN1_CONS;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
if (cursor->token_type == DIRECTIVE_OF) {
|
|
element->compound = SET_OF;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto parse_error;
|
|
element->children = parse_type(&cursor, end, NULL);
|
|
} else {
|
|
element->children = parse_compound(&cursor, end, 1);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
fprintf(stderr, "%s:%d: Token '%s' does not introduce a type\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
}
|
|
|
|
/* Handle elements that are optional */
|
|
if (cursor < end && (cursor->token_type == DIRECTIVE_OPTIONAL ||
|
|
cursor->token_type == DIRECTIVE_DEFAULT)
|
|
) {
|
|
cursor++;
|
|
top->flags |= ELEMENT_SKIPPABLE;
|
|
}
|
|
|
|
if (cursor < end && cursor->token_type == TOKEN_OPEN_ACTION) {
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
if (cursor->token_type != TOKEN_ELEMENT_NAME) {
|
|
fprintf(stderr, "%s:%d: Token '%s' is not an action function name\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
}
|
|
|
|
action = malloc(sizeof(struct action));
|
|
if (!action) {
|
|
perror(NULL);
|
|
exit(1);
|
|
}
|
|
action->index = 0;
|
|
action->name = cursor->content;
|
|
|
|
for (ppaction = &action_list;
|
|
*ppaction;
|
|
ppaction = &(*ppaction)->next
|
|
) {
|
|
int cmp = strcmp(action->name, (*ppaction)->name);
|
|
if (cmp == 0) {
|
|
free(action);
|
|
action = *ppaction;
|
|
goto found;
|
|
}
|
|
if (cmp < 0) {
|
|
action->next = *ppaction;
|
|
*ppaction = action;
|
|
nr_actions++;
|
|
goto found;
|
|
}
|
|
}
|
|
action->next = NULL;
|
|
*ppaction = action;
|
|
nr_actions++;
|
|
found:
|
|
|
|
element->action = action;
|
|
cursor->action = action;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
if (cursor->token_type != TOKEN_CLOSE_ACTION) {
|
|
fprintf(stderr, "%s:%d: Missing close action, got '%s'\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
}
|
|
cursor++;
|
|
}
|
|
|
|
*_cursor = cursor;
|
|
return top;
|
|
|
|
parse_error:
|
|
fprintf(stderr, "%s:%d: Unexpected token '%s'\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
|
|
overrun_error:
|
|
fprintf(stderr, "%s: Unexpectedly hit EOF\n", filename);
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Parse a compound type list
|
|
*/
|
|
static struct element *parse_compound(struct token **_cursor, struct token *end,
|
|
int alternates)
|
|
{
|
|
struct element *children, **child_p = &children, *element;
|
|
struct token *cursor = *_cursor, *name;
|
|
|
|
if (cursor->token_type != TOKEN_OPEN_CURLY) {
|
|
fprintf(stderr, "%s:%d: Expected compound to start with brace not '%s'\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
}
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
|
|
if (cursor->token_type == TOKEN_OPEN_CURLY) {
|
|
fprintf(stderr, "%s:%d: Empty compound\n",
|
|
filename, cursor->line);
|
|
exit(1);
|
|
}
|
|
|
|
for (;;) {
|
|
name = NULL;
|
|
if (cursor->token_type == TOKEN_ELEMENT_NAME) {
|
|
name = cursor;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
}
|
|
|
|
element = parse_type(&cursor, end, name);
|
|
if (alternates)
|
|
element->flags |= ELEMENT_SKIPPABLE | ELEMENT_CONDITIONAL;
|
|
|
|
*child_p = element;
|
|
child_p = &element->next;
|
|
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
if (cursor->token_type != TOKEN_COMMA)
|
|
break;
|
|
cursor++;
|
|
if (cursor >= end)
|
|
goto overrun_error;
|
|
}
|
|
|
|
children->flags &= ~ELEMENT_CONDITIONAL;
|
|
|
|
if (cursor->token_type != TOKEN_CLOSE_CURLY) {
|
|
fprintf(stderr, "%s:%d: Expected compound closure, got '%s'\n",
|
|
filename, cursor->line, cursor->content);
|
|
exit(1);
|
|
}
|
|
cursor++;
|
|
|
|
*_cursor = cursor;
|
|
return children;
|
|
|
|
overrun_error:
|
|
fprintf(stderr, "%s: Unexpectedly hit EOF\n", filename);
|
|
exit(1);
|
|
}
|
|
|
|
static void dump_element(const struct element *e, int level)
|
|
{
|
|
const struct element *c;
|
|
const struct type *t = e->type_def;
|
|
const char *name = e->name ? e->name->content : ".";
|
|
const char *tname = t && t->name ? t->name->content : ".";
|
|
char tag[32];
|
|
|
|
if (e->class == 0 && e->method == 0 && e->tag == 0)
|
|
strcpy(tag, "<...>");
|
|
else if (e->class == ASN1_UNIV)
|
|
sprintf(tag, "%s %s %s",
|
|
asn1_classes[e->class],
|
|
asn1_methods[e->method],
|
|
asn1_universal_tags[e->tag]);
|
|
else
|
|
sprintf(tag, "%s %s %u",
|
|
asn1_classes[e->class],
|
|
asn1_methods[e->method],
|
|
e->tag);
|
|
|
|
printf("%c%c%c%c%c %c %*s[*] \e[33m%s\e[m %s %s \e[35m%s\e[m\n",
|
|
e->flags & ELEMENT_IMPLICIT ? 'I' : '-',
|
|
e->flags & ELEMENT_EXPLICIT ? 'E' : '-',
|
|
e->flags & ELEMENT_TAG_SPECIFIED ? 'T' : '-',
|
|
e->flags & ELEMENT_SKIPPABLE ? 'S' : '-',
|
|
e->flags & ELEMENT_CONDITIONAL ? 'C' : '-',
|
|
"-tTqQcaro"[e->compound],
|
|
level, "",
|
|
tag,
|
|
tname,
|
|
name,
|
|
e->action ? e->action->name : "");
|
|
if (e->compound == TYPE_REF)
|
|
dump_element(e->type->type->element, level + 3);
|
|
else
|
|
for (c = e->children; c; c = c->next)
|
|
dump_element(c, level + 3);
|
|
}
|
|
|
|
static void dump_elements(void)
|
|
{
|
|
if (debug_opt)
|
|
dump_element(type_list[0].element, 0);
|
|
}
|
|
|
|
static void render_element(FILE *out, struct element *e, struct element *tag);
|
|
static void render_out_of_line_list(FILE *out);
|
|
|
|
static int nr_entries;
|
|
static int render_depth = 1;
|
|
static struct element *render_list, **render_list_p = &render_list;
|
|
|
|
__attribute__((format(printf, 2, 3)))
|
|
static void render_opcode(FILE *out, const char *fmt, ...)
|
|
{
|
|
va_list va;
|
|
|
|
if (out) {
|
|
fprintf(out, "\t[%4d] =%*s", nr_entries, render_depth, "");
|
|
va_start(va, fmt);
|
|
vfprintf(out, fmt, va);
|
|
va_end(va);
|
|
}
|
|
nr_entries++;
|
|
}
|
|
|
|
__attribute__((format(printf, 2, 3)))
|
|
static void render_more(FILE *out, const char *fmt, ...)
|
|
{
|
|
va_list va;
|
|
|
|
if (out) {
|
|
va_start(va, fmt);
|
|
vfprintf(out, fmt, va);
|
|
va_end(va);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Render the grammar into a state machine definition.
|
|
*/
|
|
static void render(FILE *out, FILE *hdr)
|
|
{
|
|
struct element *e;
|
|
struct action *action;
|
|
struct type *root;
|
|
int index;
|
|
|
|
fprintf(hdr, "/*\n");
|
|
fprintf(hdr, " * Automatically generated by asn1_compiler. Do not edit\n");
|
|
fprintf(hdr, " *\n");
|
|
fprintf(hdr, " * ASN.1 parser for %s\n", grammar_name);
|
|
fprintf(hdr, " */\n");
|
|
fprintf(hdr, "#include <linux/asn1_decoder.h>\n");
|
|
fprintf(hdr, "\n");
|
|
fprintf(hdr, "extern const struct asn1_decoder %s_decoder;\n", grammar_name);
|
|
if (ferror(hdr)) {
|
|
perror(headername);
|
|
exit(1);
|
|
}
|
|
|
|
fprintf(out, "/*\n");
|
|
fprintf(out, " * Automatically generated by asn1_compiler. Do not edit\n");
|
|
fprintf(out, " *\n");
|
|
fprintf(out, " * ASN.1 parser for %s\n", grammar_name);
|
|
fprintf(out, " */\n");
|
|
fprintf(out, "#include <linux/asn1_ber_bytecode.h>\n");
|
|
fprintf(out, "#include \"%s-asn1.h\"\n", grammar_name);
|
|
fprintf(out, "\n");
|
|
if (ferror(out)) {
|
|
perror(outputname);
|
|
exit(1);
|
|
}
|
|
|
|
/* Tabulate the action functions we might have to call */
|
|
fprintf(hdr, "\n");
|
|
index = 0;
|
|
for (action = action_list; action; action = action->next) {
|
|
action->index = index++;
|
|
fprintf(hdr,
|
|
"extern int %s(void *, size_t, unsigned char,"
|
|
" const void *, size_t);\n",
|
|
action->name);
|
|
}
|
|
fprintf(hdr, "\n");
|
|
|
|
fprintf(out, "enum %s_actions {\n", grammar_name);
|
|
for (action = action_list; action; action = action->next)
|
|
fprintf(out, "\tACT_%s = %u,\n",
|
|
action->name, action->index);
|
|
fprintf(out, "\tNR__%s_actions = %u\n", grammar_name, nr_actions);
|
|
fprintf(out, "};\n");
|
|
|
|
fprintf(out, "\n");
|
|
fprintf(out, "static const asn1_action_t %s_action_table[NR__%s_actions] = {\n",
|
|
grammar_name, grammar_name);
|
|
for (action = action_list; action; action = action->next)
|
|
fprintf(out, "\t[%4u] = %s,\n", action->index, action->name);
|
|
fprintf(out, "};\n");
|
|
|
|
if (ferror(out)) {
|
|
perror(outputname);
|
|
exit(1);
|
|
}
|
|
|
|
/* We do two passes - the first one calculates all the offsets */
|
|
verbose("Pass 1\n");
|
|
nr_entries = 0;
|
|
root = &type_list[0];
|
|
render_element(NULL, root->element, NULL);
|
|
render_opcode(NULL, "ASN1_OP_COMPLETE,\n");
|
|
render_out_of_line_list(NULL);
|
|
|
|
for (e = element_list; e; e = e->list_next)
|
|
e->flags &= ~ELEMENT_RENDERED;
|
|
|
|
/* And then we actually render */
|
|
verbose("Pass 2\n");
|
|
fprintf(out, "\n");
|
|
fprintf(out, "static const unsigned char %s_machine[] = {\n",
|
|
grammar_name);
|
|
|
|
nr_entries = 0;
|
|
root = &type_list[0];
|
|
render_element(out, root->element, NULL);
|
|
render_opcode(out, "ASN1_OP_COMPLETE,\n");
|
|
render_out_of_line_list(out);
|
|
|
|
fprintf(out, "};\n");
|
|
|
|
fprintf(out, "\n");
|
|
fprintf(out, "const struct asn1_decoder %s_decoder = {\n", grammar_name);
|
|
fprintf(out, "\t.machine = %s_machine,\n", grammar_name);
|
|
fprintf(out, "\t.machlen = sizeof(%s_machine),\n", grammar_name);
|
|
fprintf(out, "\t.actions = %s_action_table,\n", grammar_name);
|
|
fprintf(out, "};\n");
|
|
}
|
|
|
|
/*
|
|
* Render the out-of-line elements
|
|
*/
|
|
static void render_out_of_line_list(FILE *out)
|
|
{
|
|
struct element *e, *ce;
|
|
const char *act;
|
|
int entry;
|
|
|
|
while ((e = render_list)) {
|
|
render_list = e->render_next;
|
|
if (!render_list)
|
|
render_list_p = &render_list;
|
|
|
|
render_more(out, "\n");
|
|
e->entry_index = entry = nr_entries;
|
|
render_depth++;
|
|
for (ce = e->children; ce; ce = ce->next)
|
|
render_element(out, ce, NULL);
|
|
render_depth--;
|
|
|
|
act = e->action ? "_ACT" : "";
|
|
switch (e->compound) {
|
|
case SEQUENCE:
|
|
render_opcode(out, "ASN1_OP_END_SEQ%s,\n", act);
|
|
break;
|
|
case SEQUENCE_OF:
|
|
render_opcode(out, "ASN1_OP_END_SEQ_OF%s,\n", act);
|
|
render_opcode(out, "_jump_target(%u),\n", entry);
|
|
break;
|
|
case SET:
|
|
render_opcode(out, "ASN1_OP_END_SET%s,\n", act);
|
|
break;
|
|
case SET_OF:
|
|
render_opcode(out, "ASN1_OP_END_SET_OF%s,\n", act);
|
|
render_opcode(out, "_jump_target(%u),\n", entry);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (e->action)
|
|
render_opcode(out, "_action(ACT_%s),\n",
|
|
e->action->name);
|
|
render_opcode(out, "ASN1_OP_RETURN,\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Render an element.
|
|
*/
|
|
static void render_element(FILE *out, struct element *e, struct element *tag)
|
|
{
|
|
struct element *ec, *x;
|
|
const char *cond, *act;
|
|
int entry, skippable = 0, outofline = 0;
|
|
|
|
if (e->flags & ELEMENT_SKIPPABLE ||
|
|
(tag && tag->flags & ELEMENT_SKIPPABLE))
|
|
skippable = 1;
|
|
|
|
if ((e->type_def && e->type_def->ref_count > 1) ||
|
|
skippable)
|
|
outofline = 1;
|
|
|
|
if (e->type_def && out) {
|
|
render_more(out, "\t// %s\n", e->type_def->name->content);
|
|
}
|
|
|
|
/* Render the operation */
|
|
cond = (e->flags & ELEMENT_CONDITIONAL ||
|
|
(tag && tag->flags & ELEMENT_CONDITIONAL)) ? "COND_" : "";
|
|
act = e->action ? "_ACT" : "";
|
|
switch (e->compound) {
|
|
case ANY:
|
|
render_opcode(out, "ASN1_OP_%sMATCH_ANY%s%s,",
|
|
cond, act, skippable ? "_OR_SKIP" : "");
|
|
if (e->name)
|
|
render_more(out, "\t\t// %s", e->name->content);
|
|
render_more(out, "\n");
|
|
goto dont_render_tag;
|
|
|
|
case TAG_OVERRIDE:
|
|
render_element(out, e->children, e);
|
|
return;
|
|
|
|
case SEQUENCE:
|
|
case SEQUENCE_OF:
|
|
case SET:
|
|
case SET_OF:
|
|
render_opcode(out, "ASN1_OP_%sMATCH%s%s,",
|
|
cond,
|
|
outofline ? "_JUMP" : "",
|
|
skippable ? "_OR_SKIP" : "");
|
|
break;
|
|
|
|
case CHOICE:
|
|
goto dont_render_tag;
|
|
|
|
case TYPE_REF:
|
|
if (e->class == ASN1_UNIV && e->method == ASN1_PRIM && e->tag == 0)
|
|
goto dont_render_tag;
|
|
default:
|
|
render_opcode(out, "ASN1_OP_%sMATCH%s%s,",
|
|
cond, act,
|
|
skippable ? "_OR_SKIP" : "");
|
|
break;
|
|
}
|
|
|
|
x = tag ?: e;
|
|
if (x->name)
|
|
render_more(out, "\t\t// %s", x->name->content);
|
|
render_more(out, "\n");
|
|
|
|
/* Render the tag */
|
|
if (!tag || !(tag->flags & ELEMENT_TAG_SPECIFIED))
|
|
tag = e;
|
|
|
|
if (tag->class == ASN1_UNIV &&
|
|
tag->tag != 14 &&
|
|
tag->tag != 15 &&
|
|
tag->tag != 31)
|
|
render_opcode(out, "_tag(%s, %s, %s),\n",
|
|
asn1_classes[tag->class],
|
|
asn1_methods[tag->method | e->method],
|
|
asn1_universal_tags[tag->tag]);
|
|
else
|
|
render_opcode(out, "_tagn(%s, %s, %2u),\n",
|
|
asn1_classes[tag->class],
|
|
asn1_methods[tag->method | e->method],
|
|
tag->tag);
|
|
tag = NULL;
|
|
dont_render_tag:
|
|
|
|
/* Deal with compound types */
|
|
switch (e->compound) {
|
|
case TYPE_REF:
|
|
render_element(out, e->type->type->element, tag);
|
|
if (e->action)
|
|
render_opcode(out, "ASN1_OP_%sACT,\n",
|
|
skippable ? "MAYBE_" : "");
|
|
break;
|
|
|
|
case SEQUENCE:
|
|
if (outofline) {
|
|
/* Render out-of-line for multiple use or
|
|
* skipability */
|
|
render_opcode(out, "_jump_target(%u),", e->entry_index);
|
|
if (e->type_def && e->type_def->name)
|
|
render_more(out, "\t\t// --> %s",
|
|
e->type_def->name->content);
|
|
render_more(out, "\n");
|
|
if (!(e->flags & ELEMENT_RENDERED)) {
|
|
e->flags |= ELEMENT_RENDERED;
|
|
*render_list_p = e;
|
|
render_list_p = &e->render_next;
|
|
}
|
|
return;
|
|
} else {
|
|
/* Render inline for single use */
|
|
render_depth++;
|
|
for (ec = e->children; ec; ec = ec->next)
|
|
render_element(out, ec, NULL);
|
|
render_depth--;
|
|
render_opcode(out, "ASN1_OP_END_SEQ%s,\n", act);
|
|
}
|
|
break;
|
|
|
|
case SEQUENCE_OF:
|
|
case SET_OF:
|
|
if (outofline) {
|
|
/* Render out-of-line for multiple use or
|
|
* skipability */
|
|
render_opcode(out, "_jump_target(%u),", e->entry_index);
|
|
if (e->type_def && e->type_def->name)
|
|
render_more(out, "\t\t// --> %s",
|
|
e->type_def->name->content);
|
|
render_more(out, "\n");
|
|
if (!(e->flags & ELEMENT_RENDERED)) {
|
|
e->flags |= ELEMENT_RENDERED;
|
|
*render_list_p = e;
|
|
render_list_p = &e->render_next;
|
|
}
|
|
return;
|
|
} else {
|
|
/* Render inline for single use */
|
|
entry = nr_entries;
|
|
render_depth++;
|
|
render_element(out, e->children, NULL);
|
|
render_depth--;
|
|
if (e->compound == SEQUENCE_OF)
|
|
render_opcode(out, "ASN1_OP_END_SEQ_OF%s,\n", act);
|
|
else
|
|
render_opcode(out, "ASN1_OP_END_SET_OF%s,\n", act);
|
|
render_opcode(out, "_jump_target(%u),\n", entry);
|
|
}
|
|
break;
|
|
|
|
case SET:
|
|
/* I can't think of a nice way to do SET support without having
|
|
* a stack of bitmasks to make sure no element is repeated.
|
|
* The bitmask has also to be checked that no non-optional
|
|
* elements are left out whilst not preventing optional
|
|
* elements from being left out.
|
|
*/
|
|
fprintf(stderr, "The ASN.1 SET type is not currently supported.\n");
|
|
exit(1);
|
|
|
|
case CHOICE:
|
|
for (ec = e->children; ec; ec = ec->next)
|
|
render_element(out, ec, ec);
|
|
if (!skippable)
|
|
render_opcode(out, "ASN1_OP_COND_FAIL,\n");
|
|
if (e->action)
|
|
render_opcode(out, "ASN1_OP_ACT,\n");
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (e->action)
|
|
render_opcode(out, "_action(ACT_%s),\n", e->action->name);
|
|
}
|