發信人: iceman ( 令狐小沖), 信區: Security 

標  題: crypto.h 

發信站: 武漢白云黃鶴站 (Fri Sep  4 11:26:25 1998) , 站內信件 

  

#ifndef _crypto_h_ 

  

#  define _crypto_h_ 

  

/* crypto.h - C headers for crypto.c  */ 

  

  

  

#include "mpilib.h" 

  

  

  

/* Used to determine if nesting should be allowed */ 

  

boolean legal_ctb(byte ctb); 

  

  

  

/* Write an RSA-signed message digest of input file to specified output 

  

   file, and append input file to output file */ 

  

int signfile(boolean nested, boolean separate_signature, char *mcguffin, 

  

                         char *infile, char *outfile, char lit_mode, char *liter 

lfile); 

  

  

  

/* Reads the first count bytes from infile into header */ 

  

int get_header_info_from_file(char *infile, byte *header, int count); 

  

  

  

/* RSA-encrypt a file */ 

  

int encryptfile(char *mcguffin, char *infile, char *outfile, 

  

        boolean attempt_compression); 

  

  

  

/* Encrypt file with IPES/IDEA cipher */ 

  

int idea_encryptfile(char *infile, char *outfile, 

  

        boolean attempt_compression); 

  

  

  

/* Prepend a CTB_LITERAL prefix to a file */ 

  

int make_literal(char *infile, char *outfile, char lit_mode, char *literalfile); 

  

  

  

/* Decrypt a file (RSA or IPES/IDEA) */ 

  

int decryptfile(char *infile, char *outfile); 

  

  

  

/* Check signature in infile for validity.  Strip off the signature and 

  

   write the remaining packet to outfile */ 

  

int check_signaturefile(char *infile, char *outfile, boolean strip_signature, 

  

                        char *preserved_name); 

  

  

  

/* Decrypt file with IPES/IDEA only */ 

  

int idea_decryptfile(char *infile, char *outfile); 

  

  

  

/* Decompress a file with ZIP algorithm */ 

  

int decompress_file(char *infile, char *outfile); 

  

  

  

/* Strip off literal prefix from infile, copying to outfile */ 

  

int strip_literal(char *infile, char *outfile, char *preserved_name, 

  

                char *lit_mode); 

  

  

  

/* Convert C <-> Quiche strings */ 

  

void CToPascal(char *s); 

  

void PascalToC( char *s ); 

  

  

  

/* Reads IPES/IDEA random key and random number seed from file, cranks the 

  

   the seed through the idearand strong pseudorandom number generator, and 

  

   writes them back out */ 

  

int strong_pseudorandom(byte *buf, int bufsize); 

  

  

  

/*      Return date string, given pointer to 32-bit timestamp */ 

  

char *cdate(word32 *tstamp); 

  

  

  

/*      Return date and time string, given pointer to 32-bit timestamp */ 

  

char *ctdate(word32 *tstamp); 

  

  

  

/* Return current timestamp as a byte array and as a 32-bit word */ 

  

word32 get_timestamp(word32 *timestamp); 

  

  

  

/*      Returns the length of a packet according to the CTB and the length field 

*/ 

  

word32 getpastlength(byte ctb, FILE *f); 

  

  

  

/* Write a CTB with the appropriate length field */ 

  

void write_ctb_len (FILE *f, byte ctb_type, word32 length, boolean big); 

  

  

  

/* Print an error message and return nonzero if val != checkval */ 

  

int version_error (int val, int checkval); 

  

  

  

int check_key_sig(FILE *fkey, long fpkey, int keypktlen, char *keyuserid, 

  

         FILE *fsig, long fpsig, char *keyfile, char *siguserid, byte *xtimestam 

, 

  

         byte *sigclass); 

  

  

  

int squish_file(char *infile, char *outfile); 

  

  

  

int signkey(char *keyguffin, char *sigguffin, char *keyfile); 

  

  

  

/* Ytalk Diffie-Hellman functions */ 

  

extern int create_getDHpublic(byte* ptr); 

  

extern int getDHpublic(byte* ptr); 

  

extern int createDHkey(); 



  

extern void init_crypto(); 

  

extern void DHprepare(); 

  

extern int computeDHagreed_key(unit* key, byte** ptr); 

  

extern void DHburn(); 

  

  

  

#endif /* _crypto_h_ */ 

  

  

-- 

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