diff options
Diffstat (limited to 'usr.bin/enigma')
| -rw-r--r-- | usr.bin/enigma/Makefile | 8 | ||||
| -rw-r--r-- | usr.bin/enigma/enigma.1 | 115 | ||||
| -rw-r--r-- | usr.bin/enigma/enigma.c | 183 |
3 files changed, 0 insertions, 306 deletions
diff --git a/usr.bin/enigma/Makefile b/usr.bin/enigma/Makefile deleted file mode 100644 index 6936b7e7feb1a..0000000000000 --- a/usr.bin/enigma/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -PROG= enigma -CFLAGS+=-Wall -MAN1= enigma.1 - -LINKS= ${BINDIR}/enigma ${BINDIR}/crypt -MLINKS= enigma.1 crypt.1 - -.include <bsd.prog.mk> diff --git a/usr.bin/enigma/enigma.1 b/usr.bin/enigma/enigma.1 deleted file mode 100644 index a8d05f34c1cb1..0000000000000 --- a/usr.bin/enigma/enigma.1 +++ /dev/null @@ -1,115 +0,0 @@ -.\" -.\" enigma (aka. crypt) man page written by Joerg Wunsch. -.\" -.\" Since enigma itself is distributed in the Public Domain, this file -.\" is also. -.\" -.\" $Id$ -.\" " -.Dd October 30, 1998 -.Os -.Dt enigma 1 -.Sh NAME -.Nm enigma -.Nd very simple file encryption -.Sh SYNOPSIS -.Nm -.Op Fl s -.Op Fl k -.Op Ar password -.Nm crypt -.Op Fl s -.Op Fl k -.Op Ar password -.Sh DESCRIPTION -.Nm Enigma , -also known as -.Nm crypt -is a -.Em very -simple encryption program, working on a -.Dq secret-key -basis. It operates as a filter, i. e. it encrypts or decrypts a -stream of data from standard input, and writes the result to standard -output. It automatically detects whether the input data stream is -already encrypted, and switches into decryption mode in this case. -.Pp -There are several ways to provide the secret key to the program. By -default, the program prompts the user on the controlling terminal for -the key, using -.Xr getpass 3 . -This is the only safe way of providing it. -.Pp -Alternatively, the key can be provided as the sole command-line -argument -.Ar password -when starting the program. Obviously, this way the key can easily be -spotted by other users running -.Xr ps 1 . -As yet another alternative, -.Nm -can be given the option -.Fl k , -and it will take the key from the environment variable -.Ev CrYpTkEy . -While this at a first glance seems to be more secure than the previous -option, it actually isn't since environment variables can also be -examined with -.Xr ps 1 . -Thus this option is mainly provided for compatibility with other -implementations of -.Nm enigma . -.Pp -When specifying the option -.Fl s , -.Nm -modifies the encryption engine in a way that is supposed to make it a -little more secure, but incompatible with other implementations. -.Pp -.Ss Warning -The cryptographic value of -.Nm -is rather small. This program is only provided here for compatibility -with other operating systems that also provide an implementation. For -real encryption, refer to -.Xr bdes 1 -(from the DES distribution package), or -.Xr pgp 1 -(from the ports collection). Hoewever, restrictions for exporting, -importing or using such tools might exist in some countries, so those -stronger programs are not being shipped as part of the operating -system by default. -.Sh ENVIRONMENT -.Bl -tag -offset indent -width "XXCrYpTkEy" -.It Ev CrYpTkEy -used to obtain the secret key when option -.Fl k -has been given -.El -.Sh EXAMPLES -.Bd -literal -offset indent -man enigma | enigma > encrypted -Enter key: (XXX \(em key not echoed) -.Ed -.Pp -This will create an encrypted form of this man page, and store it in -the file -.Ql encrypted . -.Bd -literal -offset indent -enigma XXX < encrypted -.Ed -.Pp -This displays the previously created file on the terminal. -.Sh SEE ALSO -.Xr bdes 1 , -.Xr pgp 1 , -.Xr ps 1 , -.Xr getpass 3 -.Sh HISTORY -Implementations of -.Nm crypt -are very common among -.Ux -operating systems. This implementation has been taken from the -.Em Cryptbreakers Workbench -which is in the public domain. diff --git a/usr.bin/enigma/enigma.c b/usr.bin/enigma/enigma.c deleted file mode 100644 index 3b1560c3b5f91..0000000000000 --- a/usr.bin/enigma/enigma.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * "enigma.c" is in file cbw.tar from - * anonymous FTP host watmsg.waterloo.edu: pub/crypt/cbw.tar.Z - * - * A one-rotor machine designed along the lines of Enigma - * but considerably trivialized. - * - * A public-domain replacement for the UNIX "crypt" command. - * - * Upgraded to function properly on 64-bit machines. - */ - -#include <sys/types.h> -#include <sys/wait.h> - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#define MINUSKVAR "CrYpTkEy" - -#define ECHO 010 -#define ROTORSZ 256 -#define MASK 0377 -char t1[ROTORSZ]; -char t2[ROTORSZ]; -char t3[ROTORSZ]; -char deck[ROTORSZ]; -char buf[13]; - -void shuffle(char *); - -void -setup(pw) - char *pw; -{ - int ic, i, k, temp, pf[2], pid; - unsigned random; - long seed; - - strncpy(buf, pw, 8); - while (*pw) - *pw++ = '\0'; - buf[8] = buf[0]; - buf[9] = buf[1]; - pipe(pf); - if ((pid=fork())==0) { - close(0); - close(1); - dup(pf[0]); - dup(pf[1]); - execlp("makekey", "-", 0); - execl("/usr/libexec/makekey", "-", 0); /* BSDI */ - execl("/usr/lib/makekey", "-", 0); - execl("/usr/bin/makekey", "-", 0); /* IBM */ - execl("/lib/makekey", "-", 0); - perror("makekey"); - fprintf(stderr, "enigma: cannot execute 'makekey', aborting\n"); - exit(1); - } - write(pf[1], buf, 10); - close(pf[1]); - i=wait((int *)NULL); - if (i<0) perror("enigma: wait"); - if (i!=pid) { - fprintf(stderr, "enigma: expected pid %d, got pid %d\n", pid, i); - exit(1); - } - if ((i=read(pf[0], buf, 13)) != 13) { - fprintf(stderr, "enigma: cannot generate key, read %d\n",i); - exit(1); - } - seed = 123; - for (i=0; i<13; i++) - seed = seed*buf[i] + i; - for(i=0;i<ROTORSZ;i++) { - t1[i] = i; - deck[i] = i; - } - for(i=0;i<ROTORSZ;i++) { - seed = 5*seed + buf[i%13]; - if( sizeof(long) > 4 ) { - /* Force seed to stay in 32-bit signed math */ - if( seed & 0x80000000 ) - seed = seed | (-1L & ~0xFFFFFFFFL); - else - seed &= 0x7FFFFFFF; - } - random = seed % 65521; - k = ROTORSZ-1 - i; - ic = (random&MASK)%(k+1); - random >>= 8; - temp = t1[k]; - t1[k] = t1[ic]; - t1[ic] = temp; - if(t3[k]!=0) continue; - ic = (random&MASK) % k; - while(t3[ic]!=0) ic = (ic+1) % k; - t3[k] = ic; - t3[ic] = k; - } - for(i=0;i<ROTORSZ;i++) - t2[t1[i]&MASK] = i; -} - -int -main(argc, argv) - char *argv[]; -{ - register int i, n1, n2, nr1, nr2; - int secureflg = 0, kflag = 0; - char *cp; - - if (argc > 1 && argv[1][0] == '-') { - if (argv[1][1] == 's') { - argc--; - argv++; - secureflg = 1; - } else if (argv[1][1] == 'k') { - argc--; - argv++; - kflag = 1; - } - } - if (kflag) { - if ((cp = getenv(MINUSKVAR)) == NULL) { - fprintf(stderr, "%s not set\n", MINUSKVAR); - exit(1); - } - setup(cp); - } else if (argc != 2) { - setup(getpass("Enter key:")); - } - else - setup(argv[1]); - n1 = 0; - n2 = 0; - nr2 = 0; - - while((i=getchar()) != -1) { - if (secureflg) { - nr1 = deck[n1]&MASK; - nr2 = deck[nr1]&MASK; - } else { - nr1 = n1; - } - i = t2[(t3[(t1[(i+nr1)&MASK]+nr2)&MASK]-nr2)&MASK]-nr1; - putchar(i); - n1++; - if(n1==ROTORSZ) { - n1 = 0; - n2++; - if(n2==ROTORSZ) n2 = 0; - if (secureflg) { - shuffle(deck); - } else { - nr2 = n2; - } - } - } - - return 0; -} - -void -shuffle(deck) - char deck[]; -{ - int i, ic, k, temp; - unsigned random; - static long seed = 123; - - for(i=0;i<ROTORSZ;i++) { - seed = 5*seed + buf[i%13]; - random = seed % 65521; - k = ROTORSZ-1 - i; - ic = (random&MASK)%(k+1); - temp = deck[k]; - deck[k] = deck[ic]; - deck[ic] = temp; - } -} |