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Werner Koch
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214
g10/packet.h
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214
g10/packet.h
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/* packet.h - packet read/write stuff
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* Copyright (c) 1997 by Werner Koch (dd9jn)
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*
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* This file is part of G10.
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*
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* G10 is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* G10 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifndef G10_PACKET_H
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#define G10_PACKET_H
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#include "types.h"
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#include "iobuf.h"
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#include "mpi.h"
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#include "cipher.h"
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#include "filter.h"
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#define PKT_PUBKEY_ENC 1 /* public key encrypted packet */
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#define PKT_SIGNATURE 2 /* secret key encrypted packet */
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#define PKT_SECKEY_CERT 5 /* secret key certificate */
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#define PKT_PUBKEY_CERT 6 /* public key certificate */
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#define PKT_COMPR_DATA 8 /* compressed data packet */
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#define PKT_ENCR_DATA 9 /* conventional encrypted data */
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#define PKT_PLAINTEXT 11 /* plaintext data with filename and mode */
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#define PKT_RING_TRUST 12 /* keyring trust packet */
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#define PKT_USER_ID 13 /* user id packet */
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#define PKT_COMMENT 14 /* comment packet */
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typedef struct packet_struct PACKET;
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typedef struct {
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u32 keyid[2]; /* 64 bit keyid */
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byte pubkey_algo; /* algorithm used for public key scheme */
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union {
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struct {
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MPI rsa_integer; /* integer containing the DEK */
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} rsa;
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} d;
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} PKT_pubkey_enc;
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typedef struct {
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u32 keyid[2]; /* 64 bit keyid */
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u32 timestamp; /* signature made */
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byte sig_class; /* sig classification, append for MD calculation*/
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byte pubkey_algo; /* algorithm used for public key scheme */
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/* (PUBKEY_ALGO_xxx) */
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union {
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struct {
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byte digest_algo; /* algorithm used for digest (DIGEST_ALGO_xxxx) */
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byte digest_start[2]; /* first 2 byte of the digest */
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MPI rsa_integer; /* the encrypted digest */
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} rsa;
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} d;
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} PKT_signature;
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typedef struct {
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u32 timestamp; /* certificate made */
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u16 valid_days; /* valid for this number of days */
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byte pubkey_algo; /* algorithm used for public key scheme */
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md_filter_context_t mfx;
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union {
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struct {
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MPI rsa_n; /* public modulus */
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MPI rsa_e; /* public exponent */
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} rsa;
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} d;
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} PKT_pubkey_cert;
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typedef struct {
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u32 timestamp; /* certificate made */
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u16 valid_days; /* valid for this number of days */
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byte pubkey_algo; /* algorithm used for public key scheme */
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union {
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struct {
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MPI rsa_n; /* public modulus */
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MPI rsa_e; /* public exponent */
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MPI rsa_d; /* secret descryption exponent */
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MPI rsa_p; /* secret first prime number */
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MPI rsa_q; /* secret second prime number */
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MPI rsa_u; /* secret multiplicative inverse */
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u16 csum; /* checksum */
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u16 calc_csum; /* and a place to store the calculated csum */
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byte is_protected; /* The above infos are protected and must */
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/* be deciphered before use */
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byte protect_algo; /* cipher used to protect the secret informations*/
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union { /* information for the protection */
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struct {
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byte iv[8]; /* initialization vector for CFB mode */
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/* when protected, the MPIs above are pointers
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* to plain storage */
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} idea;
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struct {
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byte iv[8];
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} blowfish;
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} protect;
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} rsa;
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} d;
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} PKT_seckey_cert;
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typedef struct {
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int len; /* length of data */
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char data[1];
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} PKT_comment;
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typedef struct {
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int len; /* length of the name */
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char name[1];
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} PKT_user_id;
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typedef struct {
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u32 len; /* reserved */
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byte algorithm;
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IOBUF buf; /* IOBUF reference */
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} PKT_compressed;
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typedef struct {
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u32 len; /* length of encrypted data */
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IOBUF buf; /* IOBUF reference */
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} PKT_encr_data;
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typedef struct {
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u32 len; /* length of encrypted data */
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IOBUF buf; /* IOBUF reference */
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int mode;
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u32 timestamp;
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int namelen;
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char name[1];
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} PKT_plaintext;
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/* combine all packets into a union */
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struct packet_struct {
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int pkttype;
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PKT_pubkey_cert *pkc_parent; /* the pubkey to which it belongs */
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PKT_seckey_cert *skc_parent; /* the seckey to which it belongs */
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PKT_user_id *user_parent; /* the user_id to which it belongs */
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union {
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void *generic;
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PKT_pubkey_enc *pubkey_enc; /* PKT_PUBKEY_ENC */
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PKT_signature *signature; /* PKT_SIGNATURE */
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PKT_pubkey_cert *pubkey_cert; /* PKT_PUBKEY_CERT */
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PKT_seckey_cert *seckey_cert; /* PKT_SECKEY_CERT */
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PKT_comment *comment; /* PKT_COMMENT */
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PKT_user_id *user_id; /* PKT_USER_ID */
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PKT_compressed *compressed; /* PKT_COMPRESSED */
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PKT_encr_data *encr_data; /* PKT_ENCR_DATA */
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PKT_plaintext *plaintext; /* PKT_PLAINTEXT */
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} pkt;
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};
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#define init_packet(a) do { (a)->pkttype = 0; \
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(a)->pkc_parent = NULL; \
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(a)->skc_parent = NULL; \
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(a)->user_parent = NULL; \
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(a)->pkt.generic = NULL; \
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} while(0)
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/*-- mainproc.c --*/
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int proc_packets( IOBUF a );
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/*-- parse-packet.c --*/
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int set_packet_list_mode( int mode );
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int parse_packet( IOBUF inp, PACKET *ret_pkt);
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/*-- build-packet.c --*/
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int build_packet( IOBUF inp, PACKET *pkt );
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u32 calc_packet_length( PACKET *pkt );
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/*-- free-packet.c --*/
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void free_pubkey_enc( PKT_pubkey_enc *enc );
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void free_seckey_enc( PKT_signature *enc );
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void free_pubkey_cert( PKT_pubkey_cert *cert );
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void free_seckey_cert( PKT_seckey_cert *cert );
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void free_user_id( PKT_user_id *uid );
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void free_comment( PKT_comment *rem );
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void free_packet( PACKET *pkt );
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PKT_pubkey_cert *copy_pubkey_cert( PKT_pubkey_cert *d, PKT_pubkey_cert *s );
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/*-- sig-check.c --*/
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int signature_check( PKT_signature *sig, MD_HANDLE digest );
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/*-- seckey-cert.c --*/
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int check_secret_key( PKT_seckey_cert *cert );
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/*-- pubkey-enc.c --*/
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int get_session_key( PKT_pubkey_enc *k, DEK *dek );
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/*-- compressed.c --*/
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int handle_compressed( PKT_compressed *zd );
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/*-- encr-data.c --*/
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int decrypt_data( PKT_encr_data *ed, DEK *dek );
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int encrypt_data( PKT_encr_data *ed, DEK *dek );
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/*-- plaintext.c --*/
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int handle_plaintext( PKT_plaintext *pt );
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#endif /*G10_PACKET_H*/
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