initially checkin

1 files changed, 214 insertions, 0 deletions

diff --git a/g10/packet.h b/g10/packet.h
new file mode 100644
index 000000000..6ac57cab0
--- /dev/null
+++ b/g10/packet.h
@@ -0,0 +1,214 @@
+/* packet.h - packet read/write stuff
+ *	Copyright (c) 1997 by Werner Koch (dd9jn)
+ *
+ * This file is part of G10.
+ *
+ * G10 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.
+ *
+ * G10 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 G10_PACKET_H
+#define G10_PACKET_H
+
+#include "types.h"
+#include "iobuf.h"
+#include "mpi.h"
+#include "cipher.h"
+#include "filter.h"
+
+
+#define PKT_PUBKEY_ENC	 1  /* public key encrypted packet */
+#define PKT_SIGNATURE	 2  /* secret key encrypted packet */
+#define PKT_SECKEY_CERT  5  /* secret key certificate */
+#define PKT_PUBKEY_CERT  6  /* public key certificate */
+#define PKT_COMPR_DATA	 8  /* compressed data packet */
+#define PKT_ENCR_DATA	 9  /* conventional encrypted data */
+#define PKT_PLAINTEXT	11  /* plaintext data with filename and mode */
+#define PKT_RING_TRUST	12  /* keyring trust packet */
+#define PKT_USER_ID	13  /* user id packet */
+#define PKT_COMMENT	14  /* comment packet */
+
+typedef struct packet_struct PACKET;
+
+typedef struct {
+    u32     keyid[2];	    /* 64 bit keyid */
+    byte    pubkey_algo;    /* algorithm used for public key scheme */
+    union {
+      struct {
+	MPI  rsa_integer;   /* integer containing the DEK */
+      } rsa;
+    } d;
+} PKT_pubkey_enc;
+
+
+typedef struct {
+    u32     keyid[2];	    /* 64 bit keyid */
+    u32     timestamp;	    /* signature made */
+    byte    sig_class;	    /* sig classification, append for MD calculation*/
+    byte    pubkey_algo;    /* algorithm used for public key scheme */
+			    /* (PUBKEY_ALGO_xxx) */
+    union {
+      struct {
+	byte digest_algo;   /* algorithm used for digest (DIGEST_ALGO_xxxx) */
+	byte digest_start[2]; /* first 2 byte of the digest */
+	MPI  rsa_integer;   /* the encrypted digest */
+      } rsa;
+    } d;
+} PKT_signature;
+
+
+typedef struct {
+    u32     timestamp;	    /* certificate made */
+    u16     valid_days;     /* valid for this number of days */
+    byte    pubkey_algo;    /* algorithm used for public key scheme */
+    md_filter_context_t mfx;
+    union {
+      struct {
+	MPI rsa_n;	    /* public modulus */
+	MPI rsa_e;	    /* public exponent */
+      } rsa;
+    } d;
+} PKT_pubkey_cert;
+
+typedef struct {
+    u32     timestamp;	    /* certificate made */
+    u16     valid_days;     /* valid for this number of days */
+    byte    pubkey_algo;    /* algorithm used for public key scheme */
+    union {
+      struct {
+	MPI rsa_n;	    /* public modulus */
+	MPI rsa_e;	    /* public exponent */
+	MPI rsa_d;	    /* secret descryption exponent */
+	MPI rsa_p;	    /* secret first prime number */
+	MPI rsa_q;	    /* secret second prime number */
+	MPI rsa_u;	    /* secret multiplicative inverse */
+	u16 csum;	    /* checksum */
+	u16 calc_csum;	    /* and a place to store the calculated csum */
+	byte is_protected;  /* The above infos are protected and must */
+			    /* be deciphered before use */
+	byte protect_algo;  /* cipher used to protect the secret informations*/
+	union { 	    /* information for the protection */
+	  struct {
+	    byte iv[8];     /* initialization vector for CFB mode */
+			    /* when protected, the MPIs above are pointers
+			     * to plain storage */
+	  } idea;
+	  struct {
+	    byte iv[8];
+	  } blowfish;
+	} protect;
+      } rsa;
+    } d;
+} PKT_seckey_cert;
+
+
+typedef struct {
+    int  len;		  /* length of data */
+    char data[1];
+} PKT_comment;
+
+typedef struct {
+    int  len;		  /* length of the name */
+    char name[1];
+} PKT_user_id;
+
+typedef struct {
+    u32  len;		  /* reserved */
+    byte  algorithm;
+    IOBUF buf;		  /* IOBUF reference */
+} PKT_compressed;
+
+typedef struct {
+    u32  len;		  /* length of encrypted data */
+    IOBUF buf;		  /* IOBUF reference */
+} PKT_encr_data;
+
+typedef struct {
+    u32  len;		  /* length of encrypted data */
+    IOBUF buf;		  /* IOBUF reference */
+    int mode;
+    u32 timestamp;
+    int  namelen;
+    char name[1];
+} PKT_plaintext;
+
+/* combine all packets into a union */
+struct packet_struct {
+    int pkttype;
+    PKT_pubkey_cert *pkc_parent;     /* the pubkey to which it belongs */
+    PKT_seckey_cert *skc_parent;      /* the seckey to which it belongs */
+    PKT_user_id     *user_parent;     /* the user_id to which it belongs */
+    union {
+	void *generic;
+	PKT_pubkey_enc *pubkey_enc;	/* PKT_PUBKEY_ENC */
+	PKT_signature *signature;	/* PKT_SIGNATURE */
+	PKT_pubkey_cert *pubkey_cert;	/* PKT_PUBKEY_CERT */
+	PKT_seckey_cert *seckey_cert;	/* PKT_SECKEY_CERT */
+	PKT_comment	*comment;	/* PKT_COMMENT */
+	PKT_user_id	*user_id;	/* PKT_USER_ID */
+	PKT_compressed	*compressed;	/* PKT_COMPRESSED */
+	PKT_encr_data	*encr_data;	/* PKT_ENCR_DATA */
+	PKT_plaintext	*plaintext;	/* PKT_PLAINTEXT */
+    } pkt;
+};
+
+#define init_packet(a) do { (a)->pkttype = 0;		\
+			    (a)->pkc_parent = NULL;	\
+			    (a)->skc_parent = NULL;	\
+			    (a)->user_parent = NULL;	\
+			    (a)->pkt.generic = NULL;	\
+		       } while(0)
+
+/*-- mainproc.c --*/
+int proc_packets( IOBUF a );
+
+/*-- parse-packet.c --*/
+int set_packet_list_mode( int mode );
+int parse_packet( IOBUF inp, PACKET *ret_pkt);
+
+/*-- build-packet.c --*/
+int build_packet( IOBUF inp, PACKET *pkt );
+u32 calc_packet_length( PACKET *pkt );
+
+/*-- free-packet.c --*/
+void free_pubkey_enc( PKT_pubkey_enc *enc );
+void free_seckey_enc( PKT_signature *enc );
+void free_pubkey_cert( PKT_pubkey_cert *cert );
+void free_seckey_cert( PKT_seckey_cert *cert );
+void free_user_id( PKT_user_id *uid );
+void free_comment( PKT_comment *rem );
+void free_packet( PACKET *pkt );
+PKT_pubkey_cert *copy_pubkey_cert( PKT_pubkey_cert *d, PKT_pubkey_cert *s );
+
+
+/*-- sig-check.c --*/
+int signature_check( PKT_signature *sig, MD_HANDLE digest );
+
+/*-- seckey-cert.c --*/
+int check_secret_key( PKT_seckey_cert *cert );
+
+/*-- pubkey-enc.c --*/
+int get_session_key( PKT_pubkey_enc *k, DEK *dek );
+
+/*-- compressed.c --*/
+int handle_compressed( PKT_compressed *zd );
+
+/*-- encr-data.c --*/
+int decrypt_data( PKT_encr_data *ed, DEK *dek );
+int encrypt_data( PKT_encr_data *ed, DEK *dek );
+
+/*-- plaintext.c --*/
+int handle_plaintext( PKT_plaintext *pt );
+
+#endif /*G10_PACKET_H*/