1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user or with the express written consent of 8 * Sun Microsystems, Inc. 9 * 10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 13 * 14 * Sun RPC is provided with no support and without any obligation on the 15 * part of Sun Microsystems, Inc. to assist in its use, correction, 16 * modification or enhancement. 17 * 18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 20 * OR ANY PART THEREOF. 21 * 22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 23 * or profits or other special, indirect and consequential damages, even if 24 * Sun has been advised of the possibility of such damages. 25 * 26 * Sun Microsystems, Inc. 27 * 2550 Garcia Avenue 28 * Mountain View, California 94043 29 */ 30 #if !defined(lint) && defined(SCCSIDS) 31 static char sccsid[] = "@(#)generic.c 1.2 91/03/11 Copyr 1986 Sun Micro"; 32 #endif 33 34 /* 35 * Copyright (C) 1986, Sun Microsystems, Inc. 36 */ 37 38 #include <stdio.h> 39 #include <rpc/rpc.h> 40 #include <sys/file.h> 41 #include <mp.h> 42 #include <rpc/key_prot.h> 43 44 static int adjust __P(( char[], char * )); 45 /* 46 * Generate a seed 47 */ 48 static 49 getseed(seed, seedsize, pass) 50 char *seed; 51 int seedsize; 52 unsigned char *pass; 53 { 54 int i; 55 int rseed; 56 struct timeval tv; 57 58 (void)gettimeofday(&tv, (struct timezone *)NULL); 59 rseed = tv.tv_sec + tv.tv_usec; 60 for (i = 0; i < 8; i++) { 61 rseed ^= (rseed << 8) | pass[i]; 62 } 63 srand(rseed); 64 65 for (i = 0; i < seedsize; i++) { 66 seed[i] = (rand() & 0xff) ^ pass[i % 8]; 67 } 68 } 69 70 /* 71 * Generate a random public/secret key pair 72 */ 73 genkeys(public, secret, pass) 74 char *public; 75 char *secret; 76 char *pass; 77 { 78 int i; 79 80 # define BASEBITS (8*sizeof (short) - 1) 81 # define BASE (1 << BASEBITS) 82 83 MINT *pk = itom(0); 84 MINT *sk = itom(0); 85 MINT *tmp; 86 MINT *base = itom(BASE); 87 MINT *root = itom(PROOT); 88 MINT *modulus = xtom(HEXMODULUS); 89 short r; 90 unsigned short seed[KEYSIZE/BASEBITS + 1]; 91 char *xkey; 92 93 getseed((char *)seed, sizeof (seed), (u_char *)pass); 94 for (i = 0; i < KEYSIZE/BASEBITS + 1; i++) { 95 r = seed[i] % BASE; 96 tmp = itom(r); 97 mult(sk, base, sk); 98 madd(sk, tmp, sk); 99 mfree(tmp); 100 } 101 tmp = itom(0); 102 mdiv(sk, modulus, tmp, sk); 103 mfree(tmp); 104 pow(root, sk, modulus, pk); 105 xkey = mtox(sk); 106 adjust(secret, xkey); 107 xkey = mtox(pk); 108 adjust(public, xkey); 109 mfree(sk); 110 mfree(base); 111 mfree(pk); 112 mfree(root); 113 mfree(modulus); 114 } 115 116 /* 117 * Adjust the input key so that it is 0-filled on the left 118 */ 119 static 120 adjust(keyout, keyin) 121 char keyout[HEXKEYBYTES+1]; 122 char *keyin; 123 { 124 char *p; 125 char *s; 126 127 for (p = keyin; *p; p++) 128 ; 129 for (s = keyout + HEXKEYBYTES; p >= keyin; p--, s--) { 130 *s = *p; 131 } 132 while (s >= keyout) { 133 *s-- = '0'; 134 } 135 } 136