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/* passwd.c - Password reading/hashing routines
(c) 1989 Philip Zimmermann. All rights reserved.
Implemented in Microsoft C.
Routines for getting a pass phrase from the user's console.
*/
#include <stdio.h> /* for fprintf() */
#include <ctype.h> /* for isdigit(), toupper(), etc. */
#include <string.h> /* for strlen() */
#include "random.h" /* for getstring() */
#include "md5.h"
#include "language.h"
#include "pgp.h"
#define MAXKEYLEN 254 /* max byte length of pass phrase */
boolean showpass = FALSE;
/*
** hashpass - Hash pass phrase down to 128 bits (16 bytes).
** keylen must be less than 1024.
** Use the MD5 algorithm.
*/
void hashpass (char *keystring, int keylen, byte *hash)
{
MD5_CTX mdContext;
/* Calculate the hash */
MD5Init(&mdContext);
MD5Update(&mdContext, (unsigned char *) keystring, keylen);
MD5Final(hash, &mdContext);
} /* hashpass */
/*
** GetHashedPassPhrase - get pass phrase from user, hashes it to an IDEA key.
Parameters:
returns char *keystring as the pass phrase itself
return char *hash as the 16-byte hash of the pass phrase
using MD5.
byte noecho:
0=ask once, echo.
1=ask once, no echo.
2=ask twice, no echo.
Return 0 if no characters are input, else return 1.
If we return 0, the hashed key will not be useful.
*/
int GetHashedPassPhrase(char *hash, boolean noecho)
{ char keystr1[MAXKEYLEN+2], keystr2[MAXKEYLEN+2];
int len;
if (showpass)
noecho = 0;
while (TRUE) {
fprintf(pgpout,PSTR("\nEnter pass phrase: "));
getstring(keystr1,MAXKEYLEN-1,!noecho);
if (noecho<2) /* no need to ask again if user can see it */
break;
fprintf(pgpout,PSTR("\nEnter same pass phrase again: "));
getstring(keystr2,MAXKEYLEN-1,!noecho);
if (strcmp(keystr1,keystr2)==0)
break;
fprintf(pgpout,PSTR("\n\007Error: Pass phrases were different. Try again."));
memset(keystr2, 0, sizeof(keystr2));
}
if (noecho && (filter_mode || quietmode))
putc('\n', pgpout);
len = strlen(keystr1);
if (len == 0)
return 0;
/* We assume ASCII pass phrases, with no charset conversions. */
/* This will have to change for EBCDIC */
hashpass (keystr1, strlen(keystr1), (byte *) hash);
memset(keystr1, 0, sizeof(keystr1));
return 1;
} /* GetHashedPassPhrase */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.