[edae037] | 1 | /* zcrypt.c -- Read in a data stream from stdin & dump a decrypted/encrypted * |
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| 2 | * datastream. Reads the string to make the key from from the first * |
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| 3 | * parameter. Encrypts or decrypts according to -d or -e flag. (-e is * |
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| 4 | * default.) Will invoke zwrite if the -c option is provided for * |
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| 5 | * encryption. If a zephyr class is specified & the keyfile name omitted * |
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| 6 | * the ~/.crypt-table will be checked for "crypt-classname" and then * |
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| 7 | * "crypt-default" for the keyfile name. */ |
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| 8 | |
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| 9 | #include <stdio.h> |
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[6b1c3b6] | 10 | |
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[edae037] | 11 | #include <unistd.h> |
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| 12 | #include <sys/types.h> |
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| 13 | #include <zephyr/zephyr.h> |
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[6b1c3b6] | 14 | #include <glib.h> |
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[356465e] | 15 | #include <string.h> |
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| 16 | #include <stdlib.h> |
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| 17 | #include <sys/wait.h> |
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[edae037] | 18 | |
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[49bc81e] | 19 | #ifdef HAVE_KERBEROS_IV |
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| 20 | #include <kerberosIV/des.h> |
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| 21 | #else |
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| 22 | #include <openssl/des.h> |
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| 23 | #endif |
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| 24 | |
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[edae037] | 25 | #define MAX_KEY 128 |
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| 26 | |
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| 27 | #ifndef TRUE |
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| 28 | #define TRUE -1 |
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| 29 | #endif |
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| 30 | #ifndef FALSE |
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| 31 | #define FALSE 0 |
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| 32 | #endif |
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| 33 | |
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| 34 | #define ZWRITE_OPT_NOAUTH (1<<0) |
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| 35 | #define ZWRITE_OPT_SIGNATURE (1<<1) |
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| 36 | #define ZWRITE_OPT_IGNOREVARS (1<<2) |
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| 37 | #define ZWRITE_OPT_VERBOSE (1<<3) |
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| 38 | #define ZWRITE_OPT_QUIET (1<<4) |
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| 39 | #define ZCRYPT_OPT_MESSAGE (1<<5) |
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| 40 | #define ZCRYPT_OPT_IGNOREDOT (1<<6) |
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| 41 | |
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| 42 | typedef struct |
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| 43 | { |
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| 44 | int flags; |
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| 45 | char *signature; |
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| 46 | char *message; |
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| 47 | } ZWRITEOPTIONS; |
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| 48 | |
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| 49 | char *GetZephyrVarKeyFile(char *whoami, char *class, char *instance); |
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| 50 | char *BuildArgString(char **argv, int start, int end); |
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| 51 | int do_encrypt(char *keystring, int zephyr, char *class, char *instance, |
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| 52 | ZWRITEOPTIONS *zoptions, char* keyfile); |
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[356465e] | 53 | void do_decrypt(char *keystring); |
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[edae037] | 54 | |
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| 55 | #define M_NONE 0 |
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| 56 | #define M_ZEPHYR_ENCRYPT 1 |
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| 57 | #define M_DECRYPT 2 |
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| 58 | #define M_ENCRYPT 3 |
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| 59 | #define M_RANDOMIZE 4 |
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| 60 | #define M_SETKEY 5 |
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| 61 | |
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[356465e] | 62 | static void owl_zcrypt_string_to_schedule(char *keystring, des_key_schedule schedule) { |
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| 63 | #ifdef HAVE_KERBEROS_IV |
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| 64 | des_cblock key; |
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| 65 | #else |
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| 66 | des_cblock _key, *key = &_key; |
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| 67 | #endif |
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| 68 | |
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| 69 | des_string_to_key(keystring, key); |
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| 70 | des_key_sched(key, schedule); |
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| 71 | } |
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| 72 | |
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| 73 | int main(int argc, char *argv[]) |
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[edae037] | 74 | { |
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| 75 | char *fname = NULL; |
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| 76 | int error = FALSE; |
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| 77 | int zephyr = FALSE; |
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| 78 | char *class = NULL, *instance = NULL; |
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| 79 | int mode = M_NONE; |
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| 80 | |
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| 81 | extern int optind, opterr; |
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| 82 | extern char *optarg; |
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| 83 | char c; |
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| 84 | |
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| 85 | int messageflag = FALSE; |
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| 86 | ZWRITEOPTIONS zoptions; |
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| 87 | zoptions.flags = 0; |
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| 88 | |
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| 89 | while ((c = getopt(argc, argv, "ZDERSF:c:i:advqtluons:f:m")) != (char)EOF) |
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| 90 | { |
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| 91 | switch(c) |
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| 92 | { |
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| 93 | case 'Z': |
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| 94 | /* Zephyr encrypt */ |
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| 95 | mode = M_ZEPHYR_ENCRYPT; |
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| 96 | break; |
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| 97 | case 'D': |
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| 98 | /* Decrypt */ |
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| 99 | mode = M_DECRYPT; |
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| 100 | break; |
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| 101 | case 'E': |
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| 102 | /* Encrypt */ |
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| 103 | mode = M_ENCRYPT; |
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| 104 | break; |
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| 105 | case 'R': |
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| 106 | /* Randomize the keyfile */ |
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| 107 | mode = M_RANDOMIZE; |
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| 108 | break; |
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| 109 | case 'S': |
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| 110 | /* Set a new key value from stdin */ |
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| 111 | mode = M_SETKEY; |
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| 112 | break; |
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| 113 | case 'F': |
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| 114 | /* Specify the keyfile explicitly */ |
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| 115 | if (fname != NULL) error = TRUE; |
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| 116 | fname = optarg; |
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| 117 | break; |
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| 118 | case 'c': |
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| 119 | /* Zwrite/zcrypt: class name */ |
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| 120 | if (class != NULL) error = TRUE; |
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| 121 | class = optarg; |
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| 122 | break; |
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| 123 | case 'i': |
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| 124 | /* Zwrite/zcrypt: instance name */ |
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| 125 | if (instance != NULL) error = TRUE; |
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| 126 | instance = optarg; |
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| 127 | break; |
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| 128 | case 'a': |
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| 129 | /* Zwrite: authenticate (default) */ |
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| 130 | zoptions.flags &= ~ZWRITE_OPT_NOAUTH; |
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| 131 | break; |
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| 132 | case 'd': |
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| 133 | /* Zwrite: do not authenticate */ |
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| 134 | zoptions.flags |= ZWRITE_OPT_NOAUTH; |
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| 135 | break; |
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| 136 | case 'v': |
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| 137 | /* Zwrite: verbose */ |
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| 138 | zoptions.flags |= ZWRITE_OPT_VERBOSE; |
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| 139 | break; |
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| 140 | case 'q': |
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| 141 | /* Zwrite: quiet */ |
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| 142 | zoptions.flags |= ZWRITE_OPT_QUIET; |
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| 143 | break; |
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| 144 | case 't': |
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| 145 | /* Zwrite: no expand tabs (ignored) */ |
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| 146 | break; |
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| 147 | case 'l': |
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| 148 | /* Zwrite: ignore '.' on a line by itself (ignored) */ |
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| 149 | zoptions.flags |= ZCRYPT_OPT_IGNOREDOT; |
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| 150 | break; |
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| 151 | case 'u': |
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| 152 | /* Zwrite: urgent message */ |
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| 153 | instance = "URGENT"; |
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| 154 | break; |
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| 155 | case 'o': |
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| 156 | /* Zwrite: ignore zephyr variables zwrite-class, zwrite-inst, */ |
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| 157 | /* zwrite-opcode */ |
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| 158 | zoptions.flags |= ZWRITE_OPT_IGNOREVARS; |
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| 159 | break; |
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| 160 | case 'n': |
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| 161 | /* Zwrite: prevent PING message (always used) */ |
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| 162 | break; |
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| 163 | case 's': |
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| 164 | /* Zwrite: signature */ |
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| 165 | zoptions.flags |= ZWRITE_OPT_SIGNATURE; |
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| 166 | zoptions.signature = optarg; |
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| 167 | break; |
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| 168 | case 'f': |
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| 169 | /* Zwrite: file system specification (ignored) */ |
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| 170 | break; |
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| 171 | case 'm': |
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| 172 | /* Message on rest of line*/ |
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| 173 | messageflag = TRUE; |
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| 174 | break; |
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| 175 | case '?': |
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| 176 | error = TRUE; |
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| 177 | break; |
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| 178 | } |
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| 179 | if (error || messageflag) |
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| 180 | break; |
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| 181 | } |
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| 182 | |
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| 183 | if (class != NULL || instance != NULL) |
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| 184 | zephyr = TRUE; |
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| 185 | |
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| 186 | if (messageflag) |
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| 187 | { |
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| 188 | zoptions.flags |= ZCRYPT_OPT_MESSAGE; |
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| 189 | zoptions.message = BuildArgString(argv, optind, argc); |
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| 190 | if (!zoptions.message) |
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| 191 | { |
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[a08bfc3] | 192 | fprintf(stderr, "Memory allocation error.\n"); |
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[edae037] | 193 | error = TRUE; |
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| 194 | } |
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| 195 | } |
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| 196 | else if (optind < argc) |
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| 197 | { |
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| 198 | error = TRUE; |
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| 199 | } |
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| 200 | |
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| 201 | if (mode == M_NONE) |
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| 202 | mode = (zephyr?M_ZEPHYR_ENCRYPT:M_ENCRYPT); |
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| 203 | |
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| 204 | if (mode == M_ZEPHYR_ENCRYPT && !zephyr) |
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| 205 | error = TRUE; |
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| 206 | |
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| 207 | if (!error && fname == NULL && (class != NULL || instance != NULL)) |
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| 208 | fname = GetZephyrVarKeyFile(argv[0], class, instance); |
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| 209 | |
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| 210 | if (error || fname == NULL) |
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| 211 | { |
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[a08bfc3] | 212 | fprintf(stderr, "Usage: %s [-Z|-D|-E|-R|-S] [-F Keyfile] [-c class] [-i instance]\n", argv[0]); |
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| 213 | fprintf(stderr, " [-advqtluon] [-s signature] [-f arg] [-m message]\n"); |
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| 214 | fprintf(stderr, " One or more of class, instance, and keyfile must be specified.\n"); |
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[edae037] | 215 | } |
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| 216 | else |
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| 217 | { |
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| 218 | if (mode == M_RANDOMIZE) |
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| 219 | { |
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| 220 | /* Choose a new, random key */ |
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| 221 | /* |
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| 222 | FILE *fkey = fopen(fname, "w"); |
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| 223 | if (!fkey) |
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| 224 | printf("Could not open key file for writing: %s\n", fname); |
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| 225 | else |
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| 226 | { |
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| 227 | char string[100]; |
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| 228 | fputs(fkey, string); |
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| 229 | fclose(fkey); |
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| 230 | } |
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| 231 | */ |
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[a08bfc3] | 232 | fprintf(stderr, "Feature not yet implemented.\n"); |
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[edae037] | 233 | } |
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| 234 | else if (mode == M_SETKEY) |
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| 235 | { |
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| 236 | /* Set a new, user-entered key */ |
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| 237 | char newkey[MAX_KEY]; |
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| 238 | FILE *fkey; |
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| 239 | |
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| 240 | if (isatty(0)) |
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| 241 | { |
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| 242 | printf("Enter new key: "); |
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| 243 | /* Really should read without echo!!! */ |
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| 244 | } |
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[356465e] | 245 | if(!fgets(newkey, MAX_KEY - 1, stdin)) { |
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| 246 | fprintf(stderr, "Error reading key.\n"); |
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| 247 | return 1; |
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| 248 | } |
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[edae037] | 249 | |
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| 250 | fkey = fopen(fname, "w"); |
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| 251 | if (!fkey) |
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[a08bfc3] | 252 | fprintf(stderr, "Could not open key file for writing: %s\n", fname); |
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[edae037] | 253 | else |
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| 254 | { |
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| 255 | if (fputs(newkey, fkey) != strlen(newkey) || putc('\n', fkey) != '\n') |
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| 256 | { |
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[a08bfc3] | 257 | fprintf(stderr, "Error writing to key file.\n"); |
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[edae037] | 258 | fclose(fkey); |
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| 259 | } |
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| 260 | else |
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| 261 | { |
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| 262 | fclose(fkey); |
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[a08bfc3] | 263 | fprintf(stderr, "Key update complete.\n"); |
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[edae037] | 264 | } |
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| 265 | } |
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| 266 | } |
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| 267 | else |
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| 268 | { |
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| 269 | /* Encrypt/decrypt */ |
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| 270 | FILE *fkey = fopen(fname, "r"); |
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| 271 | if (!fkey) |
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[a08bfc3] | 272 | fprintf(stderr, "Could not open key file: %s\n", fname); |
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[edae037] | 273 | else |
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| 274 | { |
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| 275 | char keystring[MAX_KEY]; |
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[356465e] | 276 | if(!fgets(keystring, MAX_KEY-1, fkey)) { |
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| 277 | fclose(fkey); |
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| 278 | fprintf(stderr, "Error reading key file.\n"); |
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| 279 | return 1; |
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| 280 | } |
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[edae037] | 281 | if (mode == M_ZEPHYR_ENCRYPT || mode == M_ENCRYPT) |
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| 282 | do_encrypt(keystring, (mode == M_ZEPHYR_ENCRYPT), class, instance, |
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| 283 | &zoptions, fname); |
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| 284 | else |
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| 285 | do_decrypt(keystring); |
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| 286 | fclose(fkey); |
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| 287 | } |
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| 288 | } |
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| 289 | } |
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| 290 | |
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| 291 | /* Always print the **END** message if -D is specified. */ |
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| 292 | if (mode == M_DECRYPT) |
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| 293 | printf("**END**\n"); |
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[356465e] | 294 | return 0; |
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[edae037] | 295 | } |
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| 296 | |
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| 297 | /* Build a space-separated string from argv from elements between start * |
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| 298 | * and end - 1. malloc()'s the returned string. */ |
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| 299 | char *BuildArgString(char **argv, int start, int end) |
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| 300 | { |
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| 301 | int len = 1; |
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| 302 | int i; |
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| 303 | char *result; |
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| 304 | |
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| 305 | /* Compute the length of the string. (Plus 1 or 2) */ |
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| 306 | for (i = start; i < end; i++) |
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| 307 | len += strlen(argv[i]) + 1; |
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| 308 | |
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| 309 | /* Allocate memory */ |
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| 310 | result = (char *)malloc(len); |
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| 311 | if (result) |
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| 312 | { |
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| 313 | /* Build the string */ |
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| 314 | char *ptr = result; |
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| 315 | /* Start with an empty string, in case nothing is copied. */ |
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| 316 | *ptr = '\0'; |
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| 317 | /* Copy the arguments */ |
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| 318 | for (i = start; i < end; i++) |
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| 319 | { |
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| 320 | char *temp = argv[i]; |
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| 321 | /* Add a space, if not the first argument */ |
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| 322 | if (i != start) |
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| 323 | *ptr++ = ' '; |
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| 324 | /* Copy argv[i], leaving ptr pointing to the '\0' copied from temp */ |
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[356465e] | 325 | while ((*ptr = *temp++)) |
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[edae037] | 326 | ptr++; |
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| 327 | } |
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| 328 | } |
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| 329 | |
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| 330 | return result; |
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| 331 | } |
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| 332 | |
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| 333 | #define MAX_BUFF 258 |
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| 334 | #define MAX_SEARCH 3 |
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| 335 | /* Find the class/instance in the .crypt-table */ |
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| 336 | char *GetZephyrVarKeyFile(char *whoami, char *class, char *instance) |
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| 337 | { |
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[356465e] | 338 | char *keyfile = NULL; |
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[6b1c3b6] | 339 | char *varname[MAX_SEARCH]; |
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[edae037] | 340 | int length[MAX_SEARCH], i; |
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| 341 | char buffer[MAX_BUFF]; |
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[6b1c3b6] | 342 | char *filename; |
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[edae037] | 343 | char result[MAX_SEARCH][MAX_BUFF]; |
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| 344 | int numsearch = 0; |
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| 345 | FILE *fsearch; |
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| 346 | |
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[6b1c3b6] | 347 | memset(varname, 0, sizeof(varname)); |
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| 348 | |
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[edae037] | 349 | /* Determine names to look for in .crypt-table */ |
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| 350 | if (instance) |
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[6b1c3b6] | 351 | varname[numsearch++] = g_strdup_printf("crypt-%s-%s:", (class?class:"message"), instance); |
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[edae037] | 352 | if (class) |
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[6b1c3b6] | 353 | varname[numsearch++] = g_strdup_printf("crypt-%s:", class); |
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| 354 | varname[numsearch++] = g_strdup("crypt-default:"); |
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[edae037] | 355 | |
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| 356 | /* Setup the result array, and determine string lengths */ |
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| 357 | for (i = 0; i < numsearch; i++) |
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| 358 | { |
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| 359 | result[i][0] = '\0'; |
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| 360 | length[i] = strlen(varname[i]); |
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| 361 | } |
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| 362 | |
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| 363 | /* Open~/.crypt-table */ |
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[6b1c3b6] | 364 | filename = g_strdup_printf("%s/.crypt-table", getenv("HOME")); |
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[edae037] | 365 | fsearch = fopen(filename, "r"); |
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| 366 | if (fsearch) |
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| 367 | { |
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| 368 | /* Scan file for a match */ |
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| 369 | while (!feof(fsearch)) |
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| 370 | { |
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[356465e] | 371 | if (!fgets(buffer, MAX_BUFF - 3, fsearch)) break; |
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[edae037] | 372 | for (i = 0; i < numsearch; i++) |
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| 373 | if (strncasecmp(varname[i], buffer, length[i]) == 0) |
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| 374 | { |
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| 375 | int j; |
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| 376 | for (j = length[i]; buffer[j] == ' '; j++) |
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| 377 | ; |
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| 378 | strcpy(result[i], &buffer[j]); |
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| 379 | if (*result[i]) |
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| 380 | if (result[i][strlen(result[i])-1] == '\n') |
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| 381 | result[i][strlen(result[i])-1] = '\0'; |
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| 382 | } |
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| 383 | } |
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| 384 | |
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| 385 | /* Pick the "best" match found */ |
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| 386 | keyfile = NULL; |
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| 387 | for (i = 0; i < numsearch; i++) |
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| 388 | if (*result[i]) |
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| 389 | { |
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| 390 | keyfile = result[i]; |
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| 391 | break; |
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| 392 | } |
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| 393 | |
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| 394 | if (keyfile == NULL) |
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| 395 | { |
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[a08bfc3] | 396 | fprintf(stderr, "Could not find key table entry.\n"); |
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[edae037] | 397 | } |
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| 398 | else |
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| 399 | { |
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| 400 | /* Prepare result to be returned */ |
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| 401 | char *temp = keyfile; |
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| 402 | keyfile = (char *)malloc(strlen(temp) + 1); |
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| 403 | if (keyfile) |
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| 404 | strcpy(keyfile, temp); |
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| 405 | else |
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[a08bfc3] | 406 | fprintf(stderr, "Memory allocation error.\n"); |
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[edae037] | 407 | } |
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| 408 | |
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| 409 | fclose(fsearch); |
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| 410 | } |
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| 411 | else |
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[a08bfc3] | 412 | fprintf(stderr, "Could not open key table file: %s\n", filename); |
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[edae037] | 413 | |
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[6b1c3b6] | 414 | for(i = 0; i < MAX_SEARCH; i++) { |
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| 415 | if(varname[i] != NULL) { |
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| 416 | g_free(varname[i]); |
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| 417 | } |
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| 418 | } |
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| 419 | |
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| 420 | if(filename != NULL) { |
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| 421 | g_free(filename); |
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| 422 | } |
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| 423 | |
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[edae037] | 424 | return keyfile; |
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| 425 | } |
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| 426 | |
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| 427 | static pid_t zephyrpipe_pid = 0; |
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| 428 | |
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| 429 | /* Open a pipe to zwrite */ |
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| 430 | FILE *GetZephyrPipe(char *class, char *instance, ZWRITEOPTIONS *zoptions) |
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| 431 | { |
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| 432 | int fildes[2]; |
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| 433 | pid_t pid; |
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| 434 | FILE *result; |
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[356465e] | 435 | char *argv[20]; |
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| 436 | int argc = 0; |
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[edae037] | 437 | |
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| 438 | if (pipe(fildes) < 0) |
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| 439 | return NULL; |
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| 440 | pid = fork(); |
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| 441 | |
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| 442 | if (pid < 0) |
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| 443 | { |
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| 444 | /* Error: clean up */ |
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| 445 | close(fildes[0]); |
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| 446 | close(fildes[1]); |
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| 447 | result = NULL; |
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| 448 | } |
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| 449 | else if (pid == 0) |
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| 450 | { |
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| 451 | /* Setup child process */ |
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| 452 | argv[argc++] = "zwrite"; |
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| 453 | argv[argc++] = "-n"; /* Always send without ping */ |
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| 454 | if (class) |
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| 455 | { |
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| 456 | argv[argc++] = "-c"; |
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| 457 | argv[argc++] = class; |
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| 458 | } |
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| 459 | if (instance) |
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| 460 | { |
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| 461 | argv[argc++] = "-i"; |
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| 462 | argv[argc++] = instance; |
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| 463 | } |
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| 464 | if (zoptions->flags & ZWRITE_OPT_NOAUTH) |
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| 465 | argv[argc++] = "-d"; |
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| 466 | if (zoptions->flags & ZWRITE_OPT_QUIET) |
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| 467 | argv[argc++] = "-q"; |
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| 468 | if (zoptions->flags & ZWRITE_OPT_VERBOSE) |
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| 469 | argv[argc++] = "-v"; |
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| 470 | if (zoptions->flags & ZWRITE_OPT_SIGNATURE) |
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| 471 | { |
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| 472 | argv[argc++] = "-s"; |
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| 473 | argv[argc++] = zoptions->signature; |
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| 474 | } |
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| 475 | argv[argc++] = "-O"; |
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| 476 | argv[argc++] = "crypt"; |
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| 477 | argv[argc] = NULL; |
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| 478 | close(fildes[1]); |
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| 479 | if (fildes[0] != STDIN_FILENO) |
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| 480 | { |
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| 481 | if (dup2(fildes[0], STDIN_FILENO) != STDIN_FILENO) |
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| 482 | exit(0); |
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| 483 | close(fildes[0]); |
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| 484 | } |
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| 485 | close(fildes[0]); |
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| 486 | execvp(argv[0], argv); |
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[a08bfc3] | 487 | fprintf(stderr, "Exec error: could not run zwrite\n"); |
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[edae037] | 488 | exit(0); |
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| 489 | } |
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| 490 | else |
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| 491 | { |
---|
| 492 | close(fildes[0]); |
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| 493 | /* Create a FILE * for the zwrite pipe */ |
---|
| 494 | result = (FILE *)fdopen(fildes[1], "w"); |
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| 495 | zephyrpipe_pid = pid; |
---|
| 496 | } |
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| 497 | |
---|
| 498 | return result; |
---|
| 499 | } |
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| 500 | |
---|
| 501 | /* Close the pipe to zwrite */ |
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[356465e] | 502 | void CloseZephyrPipe(FILE *pipe) |
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[edae037] | 503 | { |
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| 504 | fclose(pipe); |
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| 505 | waitpid(zephyrpipe_pid, NULL, 0); |
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| 506 | zephyrpipe_pid = 0; |
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| 507 | } |
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| 508 | |
---|
| 509 | #define MAX_RESULT 2048 |
---|
| 510 | |
---|
| 511 | #define BASE_CODE 70 |
---|
| 512 | #define LAST_CODE (BASE_CODE + 15) |
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| 513 | #define OUTPUT_BLOCK_SIZE 16 |
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| 514 | |
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[356465e] | 515 | void block_to_ascii(unsigned char *output, FILE *outfile) |
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[edae037] | 516 | { |
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| 517 | int i; |
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| 518 | for (i = 0; i < 8; i++) |
---|
| 519 | { |
---|
| 520 | putc(((output[i] & 0xf0) >> 4) + BASE_CODE, outfile); |
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| 521 | putc( (output[i] & 0x0f) + BASE_CODE, outfile); |
---|
| 522 | } |
---|
| 523 | } |
---|
| 524 | |
---|
| 525 | #define MAX_LINE 128 |
---|
| 526 | |
---|
| 527 | /* Encrypt stdin, with prompt if isatty, and send to stdout, or to zwrite |
---|
| 528 | if zephyr is set. */ |
---|
| 529 | int do_encrypt(char *keystring, int zephyr, char *class, char *instance, |
---|
| 530 | ZWRITEOPTIONS *zoptions, char* keyfile) |
---|
| 531 | { |
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| 532 | des_key_schedule schedule; |
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[356465e] | 533 | unsigned char input[8], output[8]; |
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[edae037] | 534 | int size; |
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| 535 | FILE *outfile = stdout; |
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| 536 | int error = FALSE; |
---|
| 537 | char *inbuff = NULL, *inptr; |
---|
| 538 | int freein = FALSE; |
---|
| 539 | int use_buffer = FALSE; |
---|
[356465e] | 540 | int num_blocks = 0, last_block_size = 0; |
---|
[edae037] | 541 | |
---|
[356465e] | 542 | owl_zcrypt_string_to_schedule(keystring, schedule); |
---|
[edae037] | 543 | |
---|
| 544 | if (zephyr) |
---|
| 545 | { |
---|
| 546 | if (zoptions->flags & ZCRYPT_OPT_MESSAGE) |
---|
| 547 | { |
---|
| 548 | /* Use the -m message */ |
---|
| 549 | int length; |
---|
| 550 | inbuff = zoptions->message; |
---|
| 551 | length = strlen(inbuff); |
---|
| 552 | num_blocks = (length + 7) / 8; |
---|
| 553 | last_block_size = ((length + 7) % 8) + 1; |
---|
| 554 | use_buffer = TRUE; |
---|
| 555 | } |
---|
| 556 | else if (isatty(0)) |
---|
| 557 | { |
---|
| 558 | /* tty input, so show the "Type your message now..." message */ |
---|
| 559 | if (zoptions->flags & ZCRYPT_OPT_IGNOREDOT) |
---|
| 560 | printf("Type your message now. End with the end-of-file character.\n"); |
---|
| 561 | else |
---|
| 562 | printf("Type your message now. End with control-D or a dot on a line by itself.\n"); |
---|
| 563 | use_buffer = TRUE; |
---|
| 564 | if ((inptr = inbuff = (char *)malloc(MAX_RESULT)) == NULL) |
---|
| 565 | { |
---|
[a08bfc3] | 566 | fprintf(stderr, "Memory allocation error\n"); |
---|
[edae037] | 567 | return FALSE; |
---|
| 568 | } |
---|
| 569 | while (inptr - inbuff < MAX_RESULT - MAX_LINE - 20) |
---|
| 570 | { |
---|
[356465e] | 571 | if (!fgets(inptr, MAX_LINE, stdin)) |
---|
| 572 | return FALSE; |
---|
[edae037] | 573 | if (inptr[0]) |
---|
| 574 | { |
---|
| 575 | if (inptr[0] == '.' && inptr[1] == '\n' && |
---|
| 576 | !(zoptions->flags & ZCRYPT_OPT_IGNOREDOT)) |
---|
| 577 | { |
---|
| 578 | inptr[0] = '\0'; |
---|
| 579 | break; |
---|
| 580 | } |
---|
| 581 | else |
---|
| 582 | inptr += strlen(inptr); |
---|
| 583 | } |
---|
| 584 | else |
---|
| 585 | break; |
---|
| 586 | } |
---|
| 587 | num_blocks = (inptr - inbuff + 7) / 8; |
---|
| 588 | last_block_size = ((inptr - inbuff + 7) % 8) + 1; |
---|
| 589 | freein = TRUE; |
---|
| 590 | } |
---|
| 591 | |
---|
| 592 | /* if (zephyr) */ |
---|
| 593 | outfile = GetZephyrPipe(class, instance, zoptions); |
---|
| 594 | if (!outfile) |
---|
| 595 | { |
---|
[a08bfc3] | 596 | fprintf(stderr, "Could not run zwrite\n"); |
---|
[edae037] | 597 | if (freein && inbuff) |
---|
| 598 | free(inbuff); |
---|
| 599 | return FALSE; |
---|
| 600 | } |
---|
| 601 | } |
---|
| 602 | |
---|
| 603 | inptr = inbuff; |
---|
| 604 | |
---|
| 605 | /* Encrypt the input (inbuff or stdin) and send it to outfile */ |
---|
| 606 | while (TRUE) |
---|
| 607 | { |
---|
| 608 | if (use_buffer) |
---|
| 609 | { |
---|
| 610 | /* Get 8 bytes from buffer */ |
---|
| 611 | if (num_blocks > 1) |
---|
| 612 | { |
---|
| 613 | size = 8; |
---|
| 614 | memcpy(input, inptr, size); |
---|
| 615 | inptr += 8; |
---|
| 616 | num_blocks--; |
---|
| 617 | } |
---|
| 618 | else if (num_blocks == 1) |
---|
| 619 | { |
---|
| 620 | size = last_block_size; |
---|
| 621 | memcpy(input, inptr, size); |
---|
| 622 | num_blocks--; |
---|
| 623 | } |
---|
| 624 | else |
---|
| 625 | size = 0; |
---|
| 626 | } |
---|
| 627 | else |
---|
| 628 | /* Get 8 bytes from stdin */ |
---|
| 629 | size = fread(input, 1, 8, stdin); |
---|
| 630 | |
---|
| 631 | /* Check for EOF and pad the string to 8 chars, if needed */ |
---|
| 632 | if (size == 0) |
---|
| 633 | break; /* END OF INPUT: BREAK FROM while LOOP! */ |
---|
| 634 | if (size < 8) |
---|
| 635 | memset(input + size, 0, 8 - size); |
---|
| 636 | |
---|
| 637 | /* Encrypt and output the block */ |
---|
[356465e] | 638 | des_ecb_encrypt(&input, &output, schedule, TRUE); |
---|
[edae037] | 639 | block_to_ascii(output, outfile); |
---|
| 640 | |
---|
| 641 | if (size < 8) |
---|
| 642 | break; |
---|
| 643 | } |
---|
| 644 | |
---|
| 645 | /* Close out the output */ |
---|
| 646 | if (!error) |
---|
| 647 | putc('\n', outfile); |
---|
| 648 | if (zephyr) |
---|
| 649 | CloseZephyrPipe(outfile); |
---|
| 650 | |
---|
| 651 | /* Free the input buffer, if necessary */ |
---|
| 652 | if (freein && inbuff) |
---|
| 653 | free(inbuff); |
---|
| 654 | |
---|
| 655 | return !error; |
---|
| 656 | } |
---|
| 657 | |
---|
| 658 | /* Read a half-byte from stdin, skipping invalid characters. Returns -1 |
---|
| 659 | if at EOF or file error */ |
---|
[356465e] | 660 | int read_ascii_nybble(void) |
---|
[edae037] | 661 | { |
---|
| 662 | char c; |
---|
| 663 | |
---|
| 664 | while (TRUE) |
---|
| 665 | { |
---|
| 666 | if (fread(&c, 1, 1, stdin) == 0) |
---|
| 667 | return -1; |
---|
| 668 | else if (c >= BASE_CODE && c <= LAST_CODE) |
---|
| 669 | return c - BASE_CODE; |
---|
| 670 | } |
---|
| 671 | } |
---|
| 672 | |
---|
| 673 | /* Read both halves of the byte and return the single byte. Returns -1 |
---|
| 674 | if at EOF or file error. */ |
---|
[356465e] | 675 | int read_ascii_byte(void) |
---|
[edae037] | 676 | { |
---|
| 677 | int c1, c2; |
---|
| 678 | c1 = read_ascii_nybble(); |
---|
| 679 | if (c1 >= 0) |
---|
| 680 | { |
---|
| 681 | c2 = read_ascii_nybble(); |
---|
| 682 | if (c2 >= 0) |
---|
| 683 | { |
---|
| 684 | return c1 * 0x10 + c2; |
---|
| 685 | } |
---|
| 686 | } |
---|
| 687 | return -1; |
---|
| 688 | } |
---|
| 689 | |
---|
| 690 | /* Read an 8-byte DES block from stdin */ |
---|
[356465e] | 691 | int read_ascii_block(unsigned char *input) |
---|
[edae037] | 692 | { |
---|
| 693 | int c; |
---|
| 694 | |
---|
| 695 | int i; |
---|
| 696 | for (i = 0; i < 8; i++) |
---|
| 697 | { |
---|
| 698 | c = read_ascii_byte(); |
---|
| 699 | if (c < 0) |
---|
| 700 | return FALSE; |
---|
| 701 | |
---|
| 702 | input[i] = c; |
---|
| 703 | } |
---|
| 704 | |
---|
| 705 | return TRUE; |
---|
| 706 | } |
---|
| 707 | |
---|
| 708 | /* Decrypt stdin */ |
---|
[356465e] | 709 | void do_decrypt(char *keystring) |
---|
[edae037] | 710 | { |
---|
| 711 | des_key_schedule schedule; |
---|
[356465e] | 712 | unsigned char input[8], output[8]; |
---|
[edae037] | 713 | |
---|
| 714 | output[0] = '\0'; /* In case no message at all */ |
---|
| 715 | |
---|
[356465e] | 716 | owl_zcrypt_string_to_schedule(keystring, schedule); |
---|
[edae037] | 717 | |
---|
| 718 | while (read_ascii_block(input)) |
---|
| 719 | { |
---|
[356465e] | 720 | des_ecb_encrypt(&input, &output, schedule, FALSE); |
---|
[edae037] | 721 | printf("%s", output); |
---|
| 722 | } |
---|
| 723 | |
---|
[356465e] | 724 | if (!output[0] || output[strlen((const char*)output) - 1] != '\n') |
---|
[edae037] | 725 | printf("\n"); |
---|
| 726 | } |
---|