/* packet-ber.h * Helpers for ASN.1/BER dissection * Ronnie Sahlberg (C) 2004 * * $Id: packet-ber.h,v 1.5 2004/03/26 00:21:53 guy Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef __PACKET_BER_H__ #define __PACKET_BER_H__ typedef int (*ber_callback)(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset); #define BER_CLASS_UNI 0 #define BER_CLASS_APP 1 #define BER_CLASS_CON 2 #define BER_CLASS_PRI 3 #define BER_UNI_TAG_EOC 0 /* 'end-of-content' */ #define BER_UNI_TAG_BOOLEAN 1 #define BER_UNI_TAG_INTEGER 2 #define BER_UNI_TAG_BITSTRING 3 #define BER_UNI_TAG_OCTETSTRING 4 #define BER_UNI_TAG_NULL 5 #define BER_UNI_TAG_OID 6 /* OBJECT IDENTIFIER */ #define BER_UNI_TAG_ObjectDescriptor 7 #define BER_UNI_TAG_REAL 9 #define BER_UNI_TAG_ENUMERATED 10 #define BER_UNI_TAG_EMBEDDED_PDV 11 #define BER_UNI_TAG_UTF8String 12 #define BER_UNI_TAG_RELATIVE_OID 13 #define BER_UNI_TAG_SEQUENCE 16 /* SEQUENCE, SEQUENCE OF */ #define BER_UNI_TAG_SET 17 /* SET, SET OF */ #define BER_UNI_TAG_NumericString 18 #define BER_UNI_TAG_PrintableString 19 #define BER_UNI_TAG_TeletextString 20 /* TeletextString, T61String */ #define BER_UNI_TAG_VideotexString 21 #define BER_UNI_TAG_IA5String 22 #define BER_UNI_TAG_UCTTime 23 #define BER_UNI_TAG_GeneralizedTime 24 #define BER_UNI_TAG_GraphicString 25 #define BER_UNI_TAG_VisibleString 26 /* VisibleString, ISO64String */ #define BER_UNI_TAG_GeneralString 27 #define BER_UNI_TAG_UniversalString 28 #define BER_UNI_TAG_CHARACTERSTRING 29 #define BER_UNI_TAG_BMPString 30 /* this function dissects the identifier octer of the BER TLV. * We only handle TAGs (and LENGTHs) that fit inside 32 bit integers. */ extern int get_ber_identifier(tvbuff_t *tvb, int offset, guint8 *class, gboolean *pc, guint32 *tag); extern int dissect_ber_identifier(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint8 *class, gboolean *pc, guint32 *tag); /* this function dissects the identifier octer of the BER TLV. * We only handle (TAGs and) LENGTHs that fit inside 32 bit integers. */ extern int get_ber_length(tvbuff_t *tvb, int offset, guint32 *length, gboolean *ind); extern int dissect_ber_length(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint32 *length, gboolean *ind); extern int dissect_ber_octet_string(gboolean implicit_tag, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **out_tvb); extern int dissect_ber_octet_string_wcb(gboolean implicit_tag, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, ber_callback func); extern int dissect_ber_integer(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, guint32 *value); extern int dissect_ber_boolean(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id); #define BER_FLAGS_OPTIONAL 0x00000001 #define BER_FLAGS_IMPLTAG 0x00000002 #define BER_FLAGS_NOOWNTAG 0x00000004 #define BER_FLAGS_NOTCHKTAG 0x00000008 typedef struct _ber_sequence { guint8 class; guint32 tag; guint32 flags; ber_callback func; } ber_sequence; /* this function dissects a BER sequence */ extern int dissect_ber_sequence(gboolean implicit_tag, packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, ber_sequence *seq, gint hf_id, gint ett_id); typedef struct _ber_choice { guint32 value; guint8 class; guint32 tag; guint32 flags; ber_callback func; } ber_choice; /* this function dissects a BER choice */ extern int dissect_ber_choice(packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, const ber_choice *ch, gint hf_id, gint ett_id); /* this function dissects a BER strings */ extern int dissect_ber_restricted_string(gboolean implicit_tag, guint32 type, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **out_tvb); extern int dissect_ber_GeneralString(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, char *name_string, guint name_len); /* this function dissects a BER Object Identifier */ extern int dissect_ber_object_identifier(gboolean implicit_tag, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, char *value_string); /* this function dissects a BER sequence of */ extern int dissect_ber_sequence_of(gboolean implicit_tag, packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, ber_sequence *seq, gint hf_id, gint ett_id); extern int dissect_ber_set_of(gboolean implicit_tag, packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, ber_sequence *seq, gint hf_id, gint ett_id); extern int dissect_ber_generalized_time(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id); typedef struct _asn_namedbit { guint32 bit; int *p_id; gint32 gb0; /* the 1st bit of "bit group", -1 = the 1st bit of current byte */ gint32 gb1; /* last bit of "bit group", -1 = last bit of current byte */ gchar *tstr; /* true string */ gchar *fstr; /* false string */ } asn_namedbit; /* this function dissects a BER BIT-STRING */ extern int dissect_ber_bitstring(gboolean implicit_tag, packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, asn_namedbit *named_bits, gint hf_id, gint ett_id, tvbuff_t **out_tvb); extern int dissect_ber_bitstring32(gboolean implicit_tag, packet_info *pinfo, proto_tree *parent_tree, tvbuff_t *tvb, int offset, int **bit_fields, gint hf_id, gint ett_id, tvbuff_t **out_tvb); extern proto_item *ber_last_created_item; extern proto_item *get_ber_last_created_item(void); #endif /* __PACKET_BER_H__ */