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/*
Pretty Good(tm) Privacy - RSA public key cryptography for the masses
Written by Philip Zimmermann, Phil's Pretty Good(tm) Software.
Version 1.0 - 5 Jun 91, last revised 6 Jul 91 by PRZ
This file defines the various formats, filenames, and general control
methods used by PGP, as well as a few global switches which control
the functioning of the driver code.
*/
#include "usuals.h"
#include "more.h"
#include "armor.h"
#define KEYFRAGSIZE 8 /* # of bytes in key ID modulus fragment */
#define SIZEOF_TIMESTAMP 4 /* 32-bit timestamp */
/* The maximum length of the file path for this system. Varies on UNIX
systems */
#ifndef MAX_PATH
#ifdef MSDOS
#define MAX_PATH 64
#else
#define MAX_PATH 256
#endif
#endif
#ifdef ATARI
#define sizeof(x) (int)sizeof(x)
#define fread(a,b,c,d) ((int)fread(a,b,c,d))
#endif
/*
**********************************************************************
*/
/* Cipher Type Byte (CTB) definitions follow...*/
#define CTB_DESIGNATOR 0x80
#define is_ctb(c) (((c) & CTB_DESIGNATOR)==CTB_DESIGNATOR)
#define CTB_TYPE_MASK 0x7c
#define CTB_LLEN_MASK 0x03
/* "length of length" field of packet, in bytes (1, 2, 4, 8 bytes): */
#define ctb_llength(ctb) ((int) 1 << (int) ((ctb) & CTB_LLEN_MASK))
#define is_ctb_type(ctb,type) (((ctb) & CTB_TYPE_MASK)==(4*type))
#define CTB_BYTE(type,llen) (CTB_DESIGNATOR + (4*type) + llen)
#define CTB_PKE_TYPE 1 /* packet encrypted with RSA public key */
#define CTB_SKE_TYPE 2 /* packet signed with RSA secret key */
#define CTB_MD_TYPE 3 /* message digest packet */
#define CTB_CERT_SECKEY_TYPE 5 /* secret key certificate */
#define CTB_CERT_PUBKEY_TYPE 6 /* public key certificate */
#define CTB_COMPRESSED_TYPE 8 /* compressed data packet */
#define CTB_CKE_TYPE 9 /* conventional-key-encrypted data */
#define CTB_LITERAL_TYPE 10 /* raw data with filename and mode */
#define CTB_LITERAL2_TYPE 11 /* Fixed literal packet */
#define CTB_KEYCTRL_TYPE 12 /* key control packet */
#define CTB_USERID_TYPE 13 /* user id packet */
#define CTB_COMMENT_TYPE 14 /* comment packet */
/* Unimplemented CTB packet types follow... */
/* #define CTB_EXTENDED_TYPE 15 */ /* 2-byte CTB, 256 extra CTB types */
#define CTB_PKE CTB_BYTE(CTB_PKE_TYPE,1)
/* CTB_PKE len16 keyID mpi(RSA(CONKEYPKT)) */
/* 1 2 SIZE countbytes()+2 */
#define CTB_SKE CTB_BYTE(CTB_SKE_TYPE,1)
/* CTB_SKE len16 keyID mpi(RSA(MDPKT)) */
/* 1 2 SIZE countbytes()+2 */
#define CTB_MD CTB_BYTE(CTB_MD_TYPE,0)
/* CTB_MD len8 algorithm MD timestamp */
#define CTB_CERT_SECKEY CTB_BYTE(CTB_CERT_SECKEY_TYPE,1)
/* CTB_CERT_SECKEY len16 timestamp userID mpi(n) mpi(e) mpi(d) mpi(p) mpi(q) mpi(u) crc16 */
#define CTB_CERT_PUBKEY CTB_BYTE(CTB_CERT_PUBKEY_TYPE,1)
/* CTB_CERT_PUBKEY len16 timestamp userID mpi(n) mpi(e) crc16 */
#define CTB_KEYCTRL CTB_BYTE(CTB_KEYCTRL_TYPE,0)
#define CTB_USERID CTB_BYTE(CTB_USERID_TYPE,0)
#define CTB_CKE CTB_BYTE(CTB_CKE_TYPE,3)
/* CTB_CKE ciphertext */
#define CTB_LITERAL CTB_BYTE(CTB_LITERAL_TYPE,3)
#define CTB_LITERAL2 CTB_BYTE(CTB_LITERAL_TYPE,3)
/* CTB_LITERAL data */
#define CTB_COMPRESSED CTB_BYTE(CTB_COMPRESSED_TYPE,3)
/* CTB_COMPRESSED compressedtext */
/* Public key encryption algorithm selector bytes. */
#define RSA_ALGORITHM_BYTE 1 /* use RSA */
/* Conventional encryption algorithm selector bytes. */
#define IDEA_ALGORITHM_BYTE 1 /* use the IDEA cipher */
/* Message digest algorithm selector bytes. */
#define MD5_ALGORITHM_BYTE 1 /* MD5 message digest algorithm */
/* Data compression algorithm selector bytes. */
#define ZIP2_ALGORITHM_BYTE 1 /* Zip-based deflate compression algorithm */
/* Signature classification bytes. */
#define SB_SIGNATURE_BYTE 0x00 /* Signature of a binary msg or doc */
#define SM_SIGNATURE_BYTE 0x01 /* Signature of canonical msg or doc */
#define K0_SIGNATURE_BYTE 0x10 /* Key certification, generic */
#define K1_SIGNATURE_BYTE 0x11 /* Key certification, persona */
#define K2_SIGNATURE_BYTE 0x12 /* Key certification, casual ID */
#define K3_SIGNATURE_BYTE 0x13 /* Key certification, positive ID */
#define KC_SIGNATURE_BYTE 0x20 /* Key compromise */
#define KR_SIGNATURE_BYTE 0x30 /* Key revocation */
#define TS_SIGNATURE_BYTE 0x40 /* Timestamp someone else's signature */
/* Public key encrypted data classification bytes. */
#define MD_ENCRYPTED_BYTE 1 /* Message digest is encrypted */
#define CK_ENCRYPTED_BYTE 2 /* Conventional key is encrypted */
/* Version byte for data structures created by this version of PGP */
#define VERSION_BYTE_MIN 2 /* PGP2 to 2.5 */
#define VERSION_BYTE_MAX 3 /* PGP2.6 */
#define VERSION_BYTE_DEFAULT 2 /* PGP2 */
/* Max length of ASCII version string in armored output */
#define MAX_VERSION_LENGTH 20
/* Values for trust bits in keycntrl packet after key packet */
#define KC_OWNERTRUST_MASK 0x07 /* Trust bits for key owner */
#define KC_OWNERTRUST_UNDEFINED 0x00
#define KC_OWNERTRUST_UNKNOWN 0x01
#define KC_OWNERTRUST_NEVER 0x02
/* 2 levels reserved */
#define KC_OWNERTRUST_USUALLY 0x05
#define KC_OWNERTRUST_ALWAYS 0x06
#define KC_OWNERTRUST_ULTIMATE 0x07 /* Only for keys in secret ring */
#define KC_BUCKSTOP 0x80 /* This key is in secret ring */
#define KC_VISITED 0x40
#define KC_DISABLED 0x20 /* key is disabled */
/* Values for trust bits in keycntrl packet after userid packet */
#define KC_LEGIT_MASK 0x03 /* Key legit bits for key */
#define KC_LEGIT_UNKNOWN 0x00
#define KC_LEGIT_UNTRUSTED 0x01
#define KC_LEGIT_MARGINAL 0x02
#define KC_LEGIT_COMPLETE 0x03
#define KC_WARNONLY 0x80
/* Values for trust bits in keycntrl packet after signature packet */
#define KC_SIGTRUST_MASK 0x07 /* Trust bits for key owner */
#define KC_SIGTRUST_UNDEFINED 0x00
#define KC_SIGTRUST_UNKNOWN 0x01
#define KC_SIGTRUST_UNTRUSTED 0x02
/* 2 levels reserved */
#define KC_SIGTRUST_MARGINAL 0x05
#define KC_SIGTRUST_COMPLETE 0x06
#define KC_SIGTRUST_ULTIMATE 0x07
#define KC_SIG_CHECKED 0x40 /* This sig has been checked */
#define KC_CONTIG 0x80 /* This sig is on a cert. path */
#define is_secret_key(ctb) is_ctb_type(ctb,CTB_CERT_SECKEY_TYPE)
#define MPILEN (2+MAX_BYTE_PRECISION)
#define MAX_SIGCERT_LENGTH (1+2+1 +1+7 +KEYFRAGSIZE+2+2+MPILEN)
#define MAX_KEYCERT_LENGTH (1+2+1+4+2+1 +(2*MPILEN) +1+8 +(4*MPILEN) +2)
/* Modes for CTB_LITERAL2 packet */
#define MODE_BINARY 'b'
#define MODE_TEXT 't'
#define MODE_LOCAL 'l'
/* Define CANONICAL_TEXT for any system which normally uses CRLF's
for text separators */
#ifdef MSDOS
#define CANONICAL_TEXT
#endif /* MSDOS */
/* Prototype for the 'more' function, which blorts a file to the screen with
page breaks, intelligent handling of line terminators, truncation of
overly long lines, and zapping of illegal chars. Implemented in MORE.C */
int more_file(char *fileName);
/* Prototypes for the transport armor routines */
boolean is_armor_file(char *infile, long startline);
int armor_file(char *infile, char *outfile, char *filename, char *clearname);
int de_armor_file(char *infile, char *outfile, long *curline);
void user_error(void);
/* Global filenames and system-wide file extensions... */
extern char PGP_EXTENSION[];
extern char ASC_EXTENSION[];
extern char SIG_EXTENSION[];
extern char BAK_EXTENSION[];
extern char CONSOLE_FILENAME[];
extern char rel_version[];
/* These files use the environmental variable PGPPATH as a default path: */
extern char PUBLIC_KEYRING_FILENAME[32];
extern char SECRET_KEYRING_FILENAME[32];
extern char RANDSEED_FILENAME[32];
/* Variables which are global across the driver code */
extern boolean filter_mode;
extern boolean moreflag;
extern FILE *pgpout; /* FILE structure for routine output */
/* Variables settable by config.pgp and referenced in config.c ... */
extern char language[]; /* foreign language prefix code for language.pgp file */
extern char charset[];
/* my_name is substring of default userid for secret key to make signatures */
extern char my_name[];
extern char floppyring[]; /* for comparing secret keys with backup on floppy */
extern char literal_mode; /* text or binary mode for literal packet */
extern boolean emit_radix_64;
extern boolean showpass;
extern boolean keepctx;
extern boolean verbose; /* display maximum information */
extern boolean compress_enabled; /* attempt compression before encryption */
extern boolean clear_signatures;
extern boolean encrypt_to_self; /* Should I encrypt to myself? */
extern boolean batchmode; /* for batch processing */
extern boolean quietmode; /* less verbose */
extern boolean force_flag; /* overwrite existing file without asking */
extern boolean pkcs_compat; /* Use PKCS format messages */
/* Ask for each key separately if it should be added to the keyring */
extern boolean interactive_add;
extern long timeshift; /* seconds from GMT timezone */
extern boolean signature_checked;
extern int pem_lines;
extern int marg_min; /* number of marginally trusted signatures needed to
make a key fully-legit */
extern int compl_min; /* number of fully trusted signatures needed */
extern int max_cert_depth;
extern char pager[]; /* file lister command */
extern char armor_version[MAX_VERSION_LENGTH]; /* version text in armor output */
extern int version_byte; /* PGP packet format version */
/* These lists store hashed passwords for future use. */
/* passwds are passwords of as-yet-unknown purpose; keypasswds
are passwords used to decrypt keys. */
struct hashedpw {
struct hashedpw *next;
byte hash[16];
};
extern struct hashedpw *keypasswds, *passwds;
extern boolean strip_spaces;
#ifdef VMS
/*
* FDL Support Prototypes, Currently Used Only In SYSTEM.C and CRYPTO.C
*/
int fdl_generate(char *in_file, char **fdl, short *len);
VOID *fdl_create( char *fdl, short len, char *outfile, char *preserved_name);
int fdl_copyfile2bin(FILE *f, VOID *rab, word32 longcount);
void fdl_close( VOID *rab);
#endif /* VMS */
extern int compressSignature(byte *header);
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