projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| f10981a1 TL |
1 | #include "xmail.h" |
| 2 | #include "sys/types.h" | |
| 3 | #include "pwd.h" | |
| 4 | #include "sys/stat.h" | |
| 5 | #include "sys/dir.h" | |
| 6 | extern int errno; | |
| 7 | struct stat stbuf; | |
| 8 | int uid, destuid; | |
| 9 | char *myname, *dest, *keyfile[128], line[128]; | |
| 10 | struct direct dbuf; | |
| 11 | char *maildir = "/usr/spool/secretmail/"; | |
| 12 | FILE *kf, *mf, *df; | |
| 13 | MINT *a[42], *cd[6][128]; | |
| 14 | MINT *msg; | |
| 15 | char buf[256], eof; | |
| 16 | int dbg; | |
| 17 | main(argc, argv) char **argv; | |
| 18 | { int i, nmax, len; | |
| 19 | char *p; | |
| 20 | long now; | |
| 21 | if(argc != 2) | |
| 22 | xfatal("mail to exactly one person"); | |
| 23 | uid = getuid(); | |
| 24 | p =getlogin(); | |
| 25 | if(p == NULL) | |
| 26 | p = getpwuid(uid)->pw_name; | |
| 27 | myname = malloc(strlen(p)+1); | |
| 28 | strcpy(myname, p); | |
| 29 | dest = argv[1]; | |
| 30 | strcpy(keyfile, maildir); | |
| 31 | strcat(keyfile, dest); | |
| 32 | strcat(keyfile, ".key"); | |
| 33 | if(stat(keyfile, &stbuf) <0) | |
| 34 | xfatal("addressee not enrolled"); | |
| 35 | destuid = getpwnam(dest)->pw_uid; | |
| 36 | if(destuid != stbuf.st_uid) | |
| 37 | fprintf(stderr, "warning: addressee's key file may be subverted\n"); | |
| 38 | errno = 0; | |
| 39 | kf = fopen(keyfile, "r"); | |
| 40 | if(kf == NULL) | |
| 41 | xfatal("addressee's key weird"); | |
| 42 | df = fopen(maildir, "r"); | |
| 43 | if(df == NULL) | |
| 44 | { perror(maildir); | |
| 45 | exit(1); | |
| 46 | } | |
| 47 | strcpy(line, dest); | |
| 48 | strcat(line, ".%d"); | |
| 49 | nmax = -1; | |
| 50 | for(; !feof(df);) | |
| 51 | { fread(&dbuf, sizeof(dbuf), 1, df); | |
| 52 | if(dbuf.d_ino == 0) continue; | |
| 53 | if(sscanf(dbuf.d_name, line, &i) != 1) | |
| 54 | continue; | |
| 55 | if(i>nmax) nmax = i; | |
| 56 | } | |
| 57 | nmax ++; | |
| 58 | for(i=0; i<10; i++) | |
| 59 | { sprintf(line, "%s%s.%d", maildir, dest, nmax+i); | |
| 60 | if(creat(line, 0666) >= 0) break; | |
| 61 | } | |
| 62 | if(i==10) xfatal("cannot create mail file"); | |
| 63 | mf = fopen(line, "w"); | |
| 64 | init(); | |
| 65 | time(&now); | |
| 66 | sprintf(buf, "From %s %s", myname, ctime(&now) ); | |
| 67 | #ifdef DBG | |
| 68 | dbg = 1; | |
| 69 | #endif | |
| 70 | run(); | |
| 71 | sprintf(buf, "mail %s <%snotice", dest, maildir); | |
| 72 | system(buf); | |
| 73 | exit(0); | |
| 74 | } | |
| 75 | mkcd() | |
| 76 | { int i, j, k, n; | |
| 77 | for(i=0; i<42; i++) | |
| 78 | nin(a[i], kf); | |
| 79 | fclose(kf); | |
| 80 | for(i=0; i<6; i++) | |
| 81 | for(j=0; j<128; j++) | |
| 82 | for(k=j, n=0; k>0 && n<7; n++, k>>=1) | |
| 83 | if(k&01) madd(cd[i][j], a[7*i+n], cd[i][j]); | |
| 84 | } | |
| 85 | encipher(s) char s[6]; | |
| 86 | { int i; | |
| 87 | msub(msg, msg, msg); | |
| 88 | for(i=0; i<6; i++) | |
| 89 | madd(msg, cd[i][s[i]&0177], msg); | |
| 90 | } | |
| 91 | init() | |
| 92 | { int i, j; | |
| 93 | msg = itom(0); | |
| 94 | for(i=0; i<42; i++) | |
| 95 | a[i] = itom(0); | |
| 96 | for(i=0; i<6; i++) | |
| 97 | for(j=0; j<128; j++) | |
| 98 | cd[i][j] = itom(0); | |
| 99 | mkcd(); | |
| 100 | } | |
| 101 | run() | |
| 102 | { char *p; | |
| 103 | int i, len, eof = 0; | |
| 104 | for(;;) | |
| 105 | { len = strlen(buf); | |
| 106 | for(i=0; i<len/6; i++) | |
| 107 | { | |
| 108 | encipher(buf+6*i); | |
| 109 | nout(msg, mf); | |
| 110 | } | |
| 111 | p = buf; | |
| 112 | for(i *= 6; i<len; i++) | |
| 113 | *p++ = buf[i]; | |
| 114 | if(eof) return; | |
| 115 | fgets(p, sizeof(buf)-6, stdin); | |
| 116 | if(strcmp(p, ".\n") == 0 || feof(stdin)) | |
| 117 | { for(i=0; i<6; i++) *p++ = ' '; | |
| 118 | *p = 0; | |
| 119 | eof = 1; | |
| 120 | } | |
| 121 | } | |
| 122 | } |