[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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[6b1c3b6] | 13 | #include <glib.h> |
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[356465e] | 14 | #include <string.h> |
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| 15 | #include <stdlib.h> |
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| 16 | #include <sys/wait.h> |
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[8bd190d] | 17 | #include <ctype.h> |
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[8f335a8] | 18 | #include <limits.h> |
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[478dc8e] | 19 | #include <getopt.h> |
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[edae037] | 20 | |
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[6249a88f] | 21 | #include <config.h> |
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[b094191] | 22 | |
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[49bc81e] | 23 | #include <openssl/des.h> |
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| 24 | |
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[8bd190d] | 25 | #include "filterproc.h" |
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| 26 | |
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[ca1fb26a] | 27 | extern const char *version; |
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[5175cf8] | 28 | |
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[6829afc] | 29 | /* Annotate functions in which the caller owns the return value and is |
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| 30 | * responsible for ensuring it is freed. */ |
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| 31 | #define CALLER_OWN G_GNUC_WARN_UNUSED_RESULT |
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| 32 | |
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[8bd190d] | 33 | #define MAX_KEY 128 |
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| 34 | #define MAX_LINE 128 |
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| 35 | #define MAX_RESULT 4096 |
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[edae037] | 36 | |
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| 37 | #ifndef TRUE |
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| 38 | #define TRUE -1 |
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| 39 | #endif |
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| 40 | #ifndef FALSE |
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| 41 | #define FALSE 0 |
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| 42 | #endif |
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| 43 | |
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| 44 | #define ZWRITE_OPT_NOAUTH (1<<0) |
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| 45 | #define ZWRITE_OPT_SIGNATURE (1<<1) |
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| 46 | #define ZWRITE_OPT_IGNOREVARS (1<<2) |
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| 47 | #define ZWRITE_OPT_VERBOSE (1<<3) |
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| 48 | #define ZWRITE_OPT_QUIET (1<<4) |
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| 49 | #define ZCRYPT_OPT_MESSAGE (1<<5) |
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| 50 | #define ZCRYPT_OPT_IGNOREDOT (1<<6) |
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| 51 | |
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| 52 | typedef struct |
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| 53 | { |
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| 54 | int flags; |
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[1dd285b] | 55 | const char *signature; |
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[edae037] | 56 | char *message; |
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| 57 | } ZWRITEOPTIONS; |
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| 58 | |
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[6829afc] | 59 | CALLER_OWN char *GetZephyrVarKeyFile(const char *whoami, const char *class, const char *instance); |
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[e832a52] | 60 | int ParseCryptSpec(const char *spec, const char **keyfile); |
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[6829afc] | 61 | CALLER_OWN char *BuildArgString(char **argv, int start, int end); |
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| 62 | CALLER_OWN char *read_keystring(const char *keyfile); |
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[8bd190d] | 63 | |
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[e832a52] | 64 | int do_encrypt(int zephyr, const char *class, const char *instance, |
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| 65 | ZWRITEOPTIONS *zoptions, const char* keyfile, int cipher); |
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| 66 | int do_encrypt_des(const char *keyfile, const char *in, int len, FILE *out); |
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| 67 | int do_encrypt_aes(const char *keyfile, const char *in, int len, FILE *out); |
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[8bd190d] | 68 | |
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[e832a52] | 69 | int do_decrypt(const char *keyfile, int cipher); |
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| 70 | int do_decrypt_aes(const char *keyfile); |
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| 71 | int do_decrypt_des(const char *keyfile); |
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[8bd190d] | 72 | |
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[edae037] | 73 | |
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| 74 | #define M_NONE 0 |
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| 75 | #define M_ZEPHYR_ENCRYPT 1 |
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| 76 | #define M_DECRYPT 2 |
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| 77 | #define M_ENCRYPT 3 |
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| 78 | #define M_RANDOMIZE 4 |
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| 79 | #define M_SETKEY 5 |
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| 80 | |
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[6d7f2a8] | 81 | enum cipher_algo { |
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| 82 | CIPHER_DES, |
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| 83 | CIPHER_AES, |
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| 84 | NCIPHER |
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| 85 | }; |
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| 86 | |
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| 87 | typedef struct { |
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[e832a52] | 88 | int (*encrypt)(const char *keyfile, const char *in, int len, FILE *out); |
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| 89 | int (*decrypt)(const char *keyfile); |
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[6d7f2a8] | 90 | } cipher_pair; |
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| 91 | |
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| 92 | cipher_pair ciphers[NCIPHER] = { |
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[3c2c7fc] | 93 | [CIPHER_DES] = { do_encrypt_des, do_decrypt_des}, |
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| 94 | [CIPHER_AES] = { do_encrypt_aes, do_decrypt_aes}, |
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[6d7f2a8] | 95 | }; |
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[9a4077c] | 96 | |
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[9a0d25d] | 97 | static void owl_zcrypt_string_to_schedule(char *keystring, DES_key_schedule *schedule) { |
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| 98 | DES_cblock key; |
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[356465e] | 99 | |
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[9a0d25d] | 100 | DES_string_to_key(keystring, &key); |
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| 101 | DES_key_sched(&key, schedule); |
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[356465e] | 102 | } |
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| 103 | |
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[8f335a8] | 104 | void usage(FILE *file, const char *progname) |
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| 105 | { |
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| 106 | fprintf(file, "Usage: %s [-Z|-D|-E|-R|-S] [-F Keyfile] [-c class] [-i instance]\n", progname); |
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| 107 | fprintf(file, " [-advqtluon] [-s signature] [-f arg] [-m message]\n"); |
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| 108 | fprintf(file, " One or more of class, instance, and keyfile must be specified.\n"); |
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| 109 | } |
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| 110 | |
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[356465e] | 111 | int main(int argc, char *argv[]) |
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[edae037] | 112 | { |
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[9a4077c] | 113 | char *cryptspec = NULL; |
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[e832a52] | 114 | const char *keyfile; |
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[9a4077c] | 115 | int cipher; |
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[edae037] | 116 | int error = FALSE; |
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| 117 | int zephyr = FALSE; |
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[1dd285b] | 118 | const char *class = NULL, *instance = NULL; |
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[edae037] | 119 | int mode = M_NONE; |
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| 120 | |
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[478dc8e] | 121 | int c; |
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[edae037] | 122 | |
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| 123 | int messageflag = FALSE; |
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| 124 | ZWRITEOPTIONS zoptions; |
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| 125 | zoptions.flags = 0; |
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| 126 | |
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[5175cf8] | 127 | enum { |
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| 128 | OPT_VERSION = CHAR_MAX + 1, |
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[8f335a8] | 129 | OPT_HELP, |
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[5175cf8] | 130 | }; |
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[478dc8e] | 131 | static const struct option options[] = { |
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[5175cf8] | 132 | {"version", no_argument, NULL, OPT_VERSION}, |
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[8f335a8] | 133 | {"help", no_argument, NULL, OPT_HELP}, |
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[478dc8e] | 134 | {NULL, 0, NULL, 0} |
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| 135 | }; |
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| 136 | |
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| 137 | while ((c = getopt_long(argc, argv, "ZDERSF:c:i:advqtluons:f:m", options, NULL)) != -1) |
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[edae037] | 138 | { |
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| 139 | switch(c) |
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| 140 | { |
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[5175cf8] | 141 | case OPT_VERSION: |
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| 142 | /* Version */ |
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[ca1fb26a] | 143 | printf("This is zcrypt version %s\n", version); |
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[5175cf8] | 144 | exit(0); |
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[8f335a8] | 145 | case OPT_HELP: |
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| 146 | /* Help */ |
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| 147 | usage(stdout, argv[0]); |
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| 148 | exit(0); |
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[edae037] | 149 | case 'Z': |
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| 150 | /* Zephyr encrypt */ |
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| 151 | mode = M_ZEPHYR_ENCRYPT; |
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[f7f35c0] | 152 | break; |
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[edae037] | 153 | case 'D': |
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| 154 | /* Decrypt */ |
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[f7f35c0] | 155 | mode = M_DECRYPT; |
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| 156 | break; |
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[edae037] | 157 | case 'E': |
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[f7f35c0] | 158 | /* Encrypt */ |
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| 159 | mode = M_ENCRYPT; |
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| 160 | break; |
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[edae037] | 161 | case 'R': |
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[f7f35c0] | 162 | /* Randomize the keyfile */ |
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| 163 | mode = M_RANDOMIZE; |
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| 164 | break; |
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[edae037] | 165 | case 'S': |
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[f7f35c0] | 166 | /* Set a new key value from stdin */ |
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| 167 | mode = M_SETKEY; |
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| 168 | break; |
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[edae037] | 169 | case 'F': |
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[f7f35c0] | 170 | /* Specify the keyfile explicitly */ |
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[9a4077c] | 171 | if (cryptspec != NULL) error = TRUE; |
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| 172 | cryptspec = optarg; |
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[f7f35c0] | 173 | break; |
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[edae037] | 174 | case 'c': |
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[f7f35c0] | 175 | /* Zwrite/zcrypt: class name */ |
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| 176 | if (class != NULL) error = TRUE; |
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| 177 | class = optarg; |
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| 178 | break; |
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[edae037] | 179 | case 'i': |
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[f7f35c0] | 180 | /* Zwrite/zcrypt: instance name */ |
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| 181 | if (instance != NULL) error = TRUE; |
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| 182 | instance = optarg; |
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| 183 | break; |
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[edae037] | 184 | case 'a': |
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[f7f35c0] | 185 | /* Zwrite: authenticate (default) */ |
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| 186 | zoptions.flags &= ~ZWRITE_OPT_NOAUTH; |
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| 187 | break; |
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[edae037] | 188 | case 'd': |
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[f7f35c0] | 189 | /* Zwrite: do not authenticate */ |
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| 190 | zoptions.flags |= ZWRITE_OPT_NOAUTH; |
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| 191 | break; |
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[edae037] | 192 | case 'v': |
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[f7f35c0] | 193 | /* Zwrite: verbose */ |
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| 194 | zoptions.flags |= ZWRITE_OPT_VERBOSE; |
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| 195 | break; |
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[edae037] | 196 | case 'q': |
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[f7f35c0] | 197 | /* Zwrite: quiet */ |
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| 198 | zoptions.flags |= ZWRITE_OPT_QUIET; |
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| 199 | break; |
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[edae037] | 200 | case 't': |
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[f7f35c0] | 201 | /* Zwrite: no expand tabs (ignored) */ |
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| 202 | break; |
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[edae037] | 203 | case 'l': |
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[f7f35c0] | 204 | /* Zwrite: ignore '.' on a line by itself (ignored) */ |
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| 205 | zoptions.flags |= ZCRYPT_OPT_IGNOREDOT; |
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| 206 | break; |
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[edae037] | 207 | case 'u': |
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[f7f35c0] | 208 | /* Zwrite: urgent message */ |
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| 209 | instance = "URGENT"; |
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| 210 | break; |
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[edae037] | 211 | case 'o': |
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[f7f35c0] | 212 | /* Zwrite: ignore zephyr variables zwrite-class, zwrite-inst, */ |
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| 213 | /* zwrite-opcode */ |
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| 214 | zoptions.flags |= ZWRITE_OPT_IGNOREVARS; |
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| 215 | break; |
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[edae037] | 216 | case 'n': |
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[f7f35c0] | 217 | /* Zwrite: prevent PING message (always used) */ |
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| 218 | break; |
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[edae037] | 219 | case 's': |
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[f7f35c0] | 220 | /* Zwrite: signature */ |
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| 221 | zoptions.flags |= ZWRITE_OPT_SIGNATURE; |
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| 222 | zoptions.signature = optarg; |
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| 223 | break; |
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[edae037] | 224 | case 'f': |
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[f7f35c0] | 225 | /* Zwrite: file system specification (ignored) */ |
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| 226 | break; |
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[edae037] | 227 | case 'm': |
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[f7f35c0] | 228 | /* Message on rest of line*/ |
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| 229 | messageflag = TRUE; |
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| 230 | break; |
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[edae037] | 231 | case '?': |
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[f7f35c0] | 232 | error = TRUE; |
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| 233 | break; |
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[edae037] | 234 | } |
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| 235 | if (error || messageflag) |
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| 236 | break; |
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| 237 | } |
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| 238 | |
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| 239 | if (class != NULL || instance != NULL) |
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| 240 | zephyr = TRUE; |
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| 241 | |
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| 242 | if (messageflag) |
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| 243 | { |
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| 244 | zoptions.flags |= ZCRYPT_OPT_MESSAGE; |
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| 245 | zoptions.message = BuildArgString(argv, optind, argc); |
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| 246 | if (!zoptions.message) |
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| 247 | { |
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[a08bfc3] | 248 | fprintf(stderr, "Memory allocation error.\n"); |
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[edae037] | 249 | error = TRUE; |
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| 250 | } |
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| 251 | } |
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| 252 | else if (optind < argc) |
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| 253 | { |
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| 254 | error = TRUE; |
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| 255 | } |
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| 256 | |
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| 257 | if (mode == M_NONE) |
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| 258 | mode = (zephyr?M_ZEPHYR_ENCRYPT:M_ENCRYPT); |
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| 259 | |
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| 260 | if (mode == M_ZEPHYR_ENCRYPT && !zephyr) |
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| 261 | error = TRUE; |
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| 262 | |
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[9a4077c] | 263 | if (!error && cryptspec == NULL && (class != NULL || instance != NULL)) { |
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| 264 | cryptspec = GetZephyrVarKeyFile(argv[0], class, instance); |
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| 265 | if(!cryptspec) { |
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| 266 | fprintf(stderr, "Unable to find keyfile for "); |
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| 267 | if(class != NULL) { |
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| 268 | fprintf(stderr, "-c %s ", class); |
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| 269 | } |
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| 270 | if(instance != NULL) { |
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| 271 | fprintf(stderr, "-i %s ", instance); |
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| 272 | } |
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| 273 | fprintf(stderr, "\n"); |
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| 274 | exit(-1); |
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| 275 | } |
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| 276 | } |
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| 277 | |
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[7ba7d66] | 278 | if (error || !cryptspec) |
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[edae037] | 279 | { |
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[8f335a8] | 280 | usage(stderr, argv[0]); |
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[4133e34] | 281 | exit(1); |
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| 282 | } |
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[9a4077c] | 283 | |
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| 284 | cipher = ParseCryptSpec(cryptspec, &keyfile); |
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| 285 | if(cipher < 0) { |
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| 286 | fprintf(stderr, "Invalid cipher specification: %s\n", cryptspec); |
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[4133e34] | 287 | exit(1); |
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[edae037] | 288 | } |
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[9a4077c] | 289 | |
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| 290 | |
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| 291 | if (mode == M_RANDOMIZE) |
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[edae037] | 292 | { |
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[9a4077c] | 293 | /* Choose a new, random key */ |
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| 294 | /* |
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[edae037] | 295 | FILE *fkey = fopen(fname, "w"); |
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| 296 | if (!fkey) |
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[9a4077c] | 297 | printf("Could not open key file for writing: %s\n", fname); |
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[edae037] | 298 | else |
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| 299 | { |
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[9a4077c] | 300 | char string[100]; |
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| 301 | fputs(fkey, string); |
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| 302 | fclose(fkey); |
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[356465e] | 303 | } |
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[9a4077c] | 304 | */ |
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| 305 | fprintf(stderr, "Feature not yet implemented.\n"); |
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| 306 | } |
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| 307 | else if (mode == M_SETKEY) |
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| 308 | { |
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| 309 | /* Set a new, user-entered key */ |
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| 310 | char newkey[MAX_KEY]; |
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| 311 | FILE *fkey; |
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[edae037] | 312 | |
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[9a4077c] | 313 | if (isatty(0)) |
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| 314 | { |
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| 315 | printf("Enter new key: "); |
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| 316 | /* Really should read without echo!!! */ |
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| 317 | } |
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| 318 | if(!fgets(newkey, MAX_KEY - 1, stdin)) { |
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| 319 | fprintf(stderr, "Error reading key.\n"); |
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| 320 | return 1; |
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[edae037] | 321 | } |
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[9a4077c] | 322 | |
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| 323 | fkey = fopen(keyfile, "w"); |
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| 324 | if (!fkey) |
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| 325 | fprintf(stderr, "Could not open key file for writing: %s\n", keyfile); |
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[edae037] | 326 | else |
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| 327 | { |
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[9a4077c] | 328 | if (fputs(newkey, fkey) != strlen(newkey) || putc('\n', fkey) != '\n') |
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| 329 | { |
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| 330 | fprintf(stderr, "Error writing to key file.\n"); |
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| 331 | fclose(fkey); |
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[4133e34] | 332 | exit(1); |
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| 333 | } |
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[edae037] | 334 | else |
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| 335 | { |
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[f7f35c0] | 336 | fclose(fkey); |
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[9a4077c] | 337 | fprintf(stderr, "Key update complete.\n"); |
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[edae037] | 338 | } |
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| 339 | } |
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| 340 | } |
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[9a4077c] | 341 | else |
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| 342 | { |
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| 343 | if (mode == M_ZEPHYR_ENCRYPT || mode == M_ENCRYPT) |
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[8bd190d] | 344 | error = !do_encrypt((mode == M_ZEPHYR_ENCRYPT), class, instance, |
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| 345 | &zoptions, keyfile, cipher); |
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[9a4077c] | 346 | else |
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[8bd190d] | 347 | error = !do_decrypt(keyfile, cipher); |
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[9a4077c] | 348 | } |
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[edae037] | 349 | |
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| 350 | /* Always print the **END** message if -D is specified. */ |
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| 351 | if (mode == M_DECRYPT) |
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| 352 | printf("**END**\n"); |
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[8bd190d] | 353 | |
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| 354 | return error; |
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[edae037] | 355 | } |
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| 356 | |
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[e832a52] | 357 | int ParseCryptSpec(const char *spec, const char **keyfile) { |
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[8bd190d] | 358 | int cipher = CIPHER_DES; |
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| 359 | char *cipher_name = strdup(spec); |
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| 360 | char *colon = strchr(cipher_name, ':'); |
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| 361 | |
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[9a4077c] | 362 | *keyfile = spec; |
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[8bd190d] | 363 | |
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| 364 | if (colon) { |
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| 365 | char *rest = strchr(spec, ':') + 1; |
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| 366 | while(isspace(*rest)) rest++; |
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| 367 | |
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| 368 | *colon-- = '\0'; |
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| 369 | while (colon >= cipher_name && isspace(*colon)) { |
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| 370 | *colon = '\0'; |
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| 371 | } |
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| 372 | |
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| 373 | if(strcmp(cipher_name, "AES") == 0) { |
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| 374 | cipher = CIPHER_AES; |
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| 375 | *keyfile = rest; |
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| 376 | } else if(strcmp(cipher_name, "DES") == 0) { |
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| 377 | cipher = CIPHER_DES; |
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| 378 | *keyfile = rest; |
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| 379 | } |
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| 380 | } |
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| 381 | |
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| 382 | free(cipher_name); |
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| 383 | |
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| 384 | return cipher; |
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[9a4077c] | 385 | } |
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| 386 | |
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[edae037] | 387 | /* Build a space-separated string from argv from elements between start * |
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| 388 | * and end - 1. malloc()'s the returned string. */ |
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[6829afc] | 389 | CALLER_OWN char *BuildArgString(char **argv, int start, int end) |
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[edae037] | 390 | { |
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| 391 | int len = 1; |
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| 392 | int i; |
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| 393 | char *result; |
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| 394 | |
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| 395 | /* Compute the length of the string. (Plus 1 or 2) */ |
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| 396 | for (i = start; i < end; i++) |
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| 397 | len += strlen(argv[i]) + 1; |
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| 398 | |
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| 399 | /* Allocate memory */ |
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| 400 | result = (char *)malloc(len); |
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| 401 | if (result) |
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| 402 | { |
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| 403 | /* Build the string */ |
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| 404 | char *ptr = result; |
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| 405 | /* Start with an empty string, in case nothing is copied. */ |
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| 406 | *ptr = '\0'; |
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| 407 | /* Copy the arguments */ |
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| 408 | for (i = start; i < end; i++) |
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| 409 | { |
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| 410 | char *temp = argv[i]; |
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| 411 | /* Add a space, if not the first argument */ |
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| 412 | if (i != start) |
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[f7f35c0] | 413 | *ptr++ = ' '; |
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[edae037] | 414 | /* Copy argv[i], leaving ptr pointing to the '\0' copied from temp */ |
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[356465e] | 415 | while ((*ptr = *temp++)) |
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[f7f35c0] | 416 | ptr++; |
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[edae037] | 417 | } |
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| 418 | } |
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| 419 | |
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| 420 | return result; |
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| 421 | } |
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| 422 | |
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| 423 | #define MAX_BUFF 258 |
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| 424 | #define MAX_SEARCH 3 |
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| 425 | /* Find the class/instance in the .crypt-table */ |
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[6829afc] | 426 | CALLER_OWN char *GetZephyrVarKeyFile(const char *whoami, const char *class, const char *instance) |
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[edae037] | 427 | { |
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[356465e] | 428 | char *keyfile = NULL; |
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[6b1c3b6] | 429 | char *varname[MAX_SEARCH]; |
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[edae037] | 430 | int length[MAX_SEARCH], i; |
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| 431 | char buffer[MAX_BUFF]; |
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[c6332f5] | 432 | const char *home; |
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[6b1c3b6] | 433 | char *filename; |
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[edae037] | 434 | char result[MAX_SEARCH][MAX_BUFF]; |
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| 435 | int numsearch = 0; |
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| 436 | FILE *fsearch; |
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| 437 | |
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[6b1c3b6] | 438 | memset(varname, 0, sizeof(varname)); |
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| 439 | |
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[edae037] | 440 | /* Determine names to look for in .crypt-table */ |
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| 441 | if (instance) |
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[6b1c3b6] | 442 | varname[numsearch++] = g_strdup_printf("crypt-%s-%s:", (class?class:"message"), instance); |
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[edae037] | 443 | if (class) |
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[6b1c3b6] | 444 | varname[numsearch++] = g_strdup_printf("crypt-%s:", class); |
---|
| 445 | varname[numsearch++] = g_strdup("crypt-default:"); |
---|
[edae037] | 446 | |
---|
| 447 | /* Setup the result array, and determine string lengths */ |
---|
| 448 | for (i = 0; i < numsearch; i++) |
---|
| 449 | { |
---|
| 450 | result[i][0] = '\0'; |
---|
| 451 | length[i] = strlen(varname[i]); |
---|
| 452 | } |
---|
| 453 | |
---|
| 454 | /* Open~/.crypt-table */ |
---|
[c6332f5] | 455 | home = getenv("HOME"); |
---|
| 456 | if (home == NULL) |
---|
| 457 | home = g_get_home_dir(); |
---|
[dde1b4d] | 458 | filename = g_build_filename(home, ".crypt-table", NULL); |
---|
[edae037] | 459 | fsearch = fopen(filename, "r"); |
---|
| 460 | if (fsearch) |
---|
| 461 | { |
---|
| 462 | /* Scan file for a match */ |
---|
| 463 | while (!feof(fsearch)) |
---|
| 464 | { |
---|
[356465e] | 465 | if (!fgets(buffer, MAX_BUFF - 3, fsearch)) break; |
---|
[edae037] | 466 | for (i = 0; i < numsearch; i++) |
---|
[f7f35c0] | 467 | if (strncasecmp(varname[i], buffer, length[i]) == 0) |
---|
| 468 | { |
---|
| 469 | int j; |
---|
| 470 | for (j = length[i]; buffer[j] == ' '; j++) |
---|
| 471 | ; |
---|
| 472 | strcpy(result[i], &buffer[j]); |
---|
| 473 | if (*result[i]) |
---|
| 474 | if (result[i][strlen(result[i])-1] == '\n') |
---|
| 475 | result[i][strlen(result[i])-1] = '\0'; |
---|
| 476 | } |
---|
[edae037] | 477 | } |
---|
| 478 | |
---|
| 479 | /* Pick the "best" match found */ |
---|
| 480 | keyfile = NULL; |
---|
| 481 | for (i = 0; i < numsearch; i++) |
---|
| 482 | if (*result[i]) |
---|
| 483 | { |
---|
[f7f35c0] | 484 | keyfile = result[i]; |
---|
| 485 | break; |
---|
[edae037] | 486 | } |
---|
| 487 | |
---|
[9a4077c] | 488 | if (keyfile != NULL) |
---|
[edae037] | 489 | { |
---|
| 490 | /* Prepare result to be returned */ |
---|
| 491 | char *temp = keyfile; |
---|
| 492 | keyfile = (char *)malloc(strlen(temp) + 1); |
---|
| 493 | if (keyfile) |
---|
[f7f35c0] | 494 | strcpy(keyfile, temp); |
---|
[edae037] | 495 | else |
---|
[f7f35c0] | 496 | fprintf(stderr, "Memory allocation error.\n"); |
---|
[edae037] | 497 | } |
---|
| 498 | fclose(fsearch); |
---|
| 499 | } |
---|
| 500 | else |
---|
[a08bfc3] | 501 | fprintf(stderr, "Could not open key table file: %s\n", filename); |
---|
[edae037] | 502 | |
---|
[6b1c3b6] | 503 | for(i = 0; i < MAX_SEARCH; i++) { |
---|
[3b8a563] | 504 | g_free(varname[i]); |
---|
[6b1c3b6] | 505 | } |
---|
| 506 | |
---|
[3b8a563] | 507 | g_free(filename); |
---|
[6b1c3b6] | 508 | |
---|
[edae037] | 509 | return keyfile; |
---|
| 510 | } |
---|
| 511 | |
---|
| 512 | static pid_t zephyrpipe_pid = 0; |
---|
| 513 | |
---|
| 514 | /* Open a pipe to zwrite */ |
---|
[e832a52] | 515 | FILE *GetZephyrPipe(const char *class, const char *instance, const ZWRITEOPTIONS *zoptions) |
---|
[edae037] | 516 | { |
---|
| 517 | int fildes[2]; |
---|
| 518 | pid_t pid; |
---|
| 519 | FILE *result; |
---|
[e832a52] | 520 | const char *argv[20]; |
---|
[356465e] | 521 | int argc = 0; |
---|
[edae037] | 522 | |
---|
| 523 | if (pipe(fildes) < 0) |
---|
| 524 | return NULL; |
---|
| 525 | pid = fork(); |
---|
| 526 | |
---|
| 527 | if (pid < 0) |
---|
| 528 | { |
---|
| 529 | /* Error: clean up */ |
---|
| 530 | close(fildes[0]); |
---|
| 531 | close(fildes[1]); |
---|
| 532 | result = NULL; |
---|
| 533 | } |
---|
| 534 | else if (pid == 0) |
---|
| 535 | { |
---|
| 536 | /* Setup child process */ |
---|
| 537 | argv[argc++] = "zwrite"; |
---|
| 538 | argv[argc++] = "-n"; /* Always send without ping */ |
---|
| 539 | if (class) |
---|
| 540 | { |
---|
| 541 | argv[argc++] = "-c"; |
---|
| 542 | argv[argc++] = class; |
---|
| 543 | } |
---|
| 544 | if (instance) |
---|
| 545 | { |
---|
| 546 | argv[argc++] = "-i"; |
---|
| 547 | argv[argc++] = instance; |
---|
| 548 | } |
---|
| 549 | if (zoptions->flags & ZWRITE_OPT_NOAUTH) |
---|
| 550 | argv[argc++] = "-d"; |
---|
| 551 | if (zoptions->flags & ZWRITE_OPT_QUIET) |
---|
| 552 | argv[argc++] = "-q"; |
---|
| 553 | if (zoptions->flags & ZWRITE_OPT_VERBOSE) |
---|
| 554 | argv[argc++] = "-v"; |
---|
| 555 | if (zoptions->flags & ZWRITE_OPT_SIGNATURE) |
---|
| 556 | { |
---|
| 557 | argv[argc++] = "-s"; |
---|
| 558 | argv[argc++] = zoptions->signature; |
---|
| 559 | } |
---|
| 560 | argv[argc++] = "-O"; |
---|
| 561 | argv[argc++] = "crypt"; |
---|
| 562 | argv[argc] = NULL; |
---|
| 563 | close(fildes[1]); |
---|
| 564 | if (fildes[0] != STDIN_FILENO) |
---|
| 565 | { |
---|
| 566 | if (dup2(fildes[0], STDIN_FILENO) != STDIN_FILENO) |
---|
[f7f35c0] | 567 | exit(0); |
---|
[edae037] | 568 | close(fildes[0]); |
---|
| 569 | } |
---|
| 570 | close(fildes[0]); |
---|
[e832a52] | 571 | execvp(argv[0], (char **)argv); |
---|
[a08bfc3] | 572 | fprintf(stderr, "Exec error: could not run zwrite\n"); |
---|
[edae037] | 573 | exit(0); |
---|
| 574 | } |
---|
| 575 | else |
---|
| 576 | { |
---|
| 577 | close(fildes[0]); |
---|
| 578 | /* Create a FILE * for the zwrite pipe */ |
---|
| 579 | result = (FILE *)fdopen(fildes[1], "w"); |
---|
| 580 | zephyrpipe_pid = pid; |
---|
| 581 | } |
---|
| 582 | |
---|
| 583 | return result; |
---|
| 584 | } |
---|
| 585 | |
---|
| 586 | /* Close the pipe to zwrite */ |
---|
[356465e] | 587 | void CloseZephyrPipe(FILE *pipe) |
---|
[edae037] | 588 | { |
---|
| 589 | fclose(pipe); |
---|
| 590 | waitpid(zephyrpipe_pid, NULL, 0); |
---|
| 591 | zephyrpipe_pid = 0; |
---|
| 592 | } |
---|
| 593 | |
---|
| 594 | #define BASE_CODE 70 |
---|
| 595 | #define LAST_CODE (BASE_CODE + 15) |
---|
| 596 | #define OUTPUT_BLOCK_SIZE 16 |
---|
| 597 | |
---|
[356465e] | 598 | void block_to_ascii(unsigned char *output, FILE *outfile) |
---|
[edae037] | 599 | { |
---|
| 600 | int i; |
---|
| 601 | for (i = 0; i < 8; i++) |
---|
| 602 | { |
---|
| 603 | putc(((output[i] & 0xf0) >> 4) + BASE_CODE, outfile); |
---|
| 604 | putc( (output[i] & 0x0f) + BASE_CODE, outfile); |
---|
| 605 | } |
---|
| 606 | } |
---|
| 607 | |
---|
[6829afc] | 608 | CALLER_OWN char *slurp_stdin(int ignoredot, int *length) { |
---|
[9a4077c] | 609 | char *buf; |
---|
| 610 | char *inptr; |
---|
[edae037] | 611 | |
---|
[8bd190d] | 612 | if ((inptr = buf = (char *)malloc(MAX_RESULT)) == NULL) |
---|
| 613 | { |
---|
| 614 | fprintf(stderr, "Memory allocation error\n"); |
---|
| 615 | return NULL; |
---|
| 616 | } |
---|
| 617 | while (inptr - buf < MAX_RESULT - MAX_LINE - 20) |
---|
| 618 | { |
---|
| 619 | if (fgets(inptr, MAX_LINE, stdin) == NULL) |
---|
| 620 | break; |
---|
| 621 | |
---|
| 622 | if (inptr[0]) |
---|
| 623 | { |
---|
| 624 | if (inptr[0] == '.' && inptr[1] == '\n' && !ignoredot) |
---|
| 625 | { |
---|
| 626 | inptr[0] = '\0'; |
---|
| 627 | break; |
---|
| 628 | } |
---|
| 629 | else |
---|
| 630 | inptr += strlen(inptr); |
---|
| 631 | } |
---|
| 632 | else |
---|
| 633 | break; |
---|
| 634 | } |
---|
| 635 | *length = inptr - buf; |
---|
| 636 | |
---|
| 637 | return buf; |
---|
| 638 | } |
---|
| 639 | |
---|
[6829afc] | 640 | CALLER_OWN char *GetInputBuffer(ZWRITEOPTIONS *zoptions, int *length) { |
---|
[8bd190d] | 641 | char *buf; |
---|
| 642 | |
---|
[9a4077c] | 643 | if (zoptions->flags & ZCRYPT_OPT_MESSAGE) |
---|
[edae037] | 644 | { |
---|
[9a4077c] | 645 | /* Use the -m message */ |
---|
| 646 | buf = strdup(zoptions->message); |
---|
| 647 | *length = strlen(buf); |
---|
| 648 | } |
---|
| 649 | else |
---|
| 650 | { |
---|
| 651 | if (isatty(0)) { |
---|
[edae037] | 652 | /* tty input, so show the "Type your message now..." message */ |
---|
| 653 | if (zoptions->flags & ZCRYPT_OPT_IGNOREDOT) |
---|
[f7f35c0] | 654 | printf("Type your message now. End with the end-of-file character.\n"); |
---|
[edae037] | 655 | else |
---|
[f7f35c0] | 656 | printf("Type your message now. End with control-D or a dot on a line by itself.\n"); |
---|
[9a4077c] | 657 | } else { |
---|
| 658 | zoptions->flags |= ZCRYPT_OPT_IGNOREDOT; |
---|
| 659 | } |
---|
| 660 | |
---|
[8bd190d] | 661 | buf = slurp_stdin(zoptions->flags & ZCRYPT_OPT_IGNOREDOT, length); |
---|
[9a4077c] | 662 | } |
---|
| 663 | return buf; |
---|
| 664 | } |
---|
| 665 | |
---|
[6829afc] | 666 | CALLER_OWN char *read_keystring(const char *keyfile) { |
---|
[9a4077c] | 667 | char *keystring; |
---|
| 668 | FILE *fkey = fopen(keyfile, "r"); |
---|
| 669 | if(!fkey) { |
---|
| 670 | fprintf(stderr, "Unable to open keyfile %s\n", keyfile); |
---|
| 671 | return NULL; |
---|
| 672 | } |
---|
| 673 | keystring = malloc(MAX_KEY); |
---|
| 674 | if(!fgets(keystring, MAX_KEY-1, fkey)) { |
---|
| 675 | fprintf(stderr, "Unable to read from keyfile: %s\n", keyfile); |
---|
| 676 | free(keystring); |
---|
| 677 | keystring = NULL; |
---|
| 678 | } |
---|
| 679 | fclose(fkey); |
---|
| 680 | return keystring; |
---|
| 681 | } |
---|
| 682 | |
---|
| 683 | /* Encrypt stdin, with prompt if isatty, and send to stdout, or to zwrite |
---|
| 684 | if zephyr is set. */ |
---|
[e832a52] | 685 | int do_encrypt(int zephyr, const char *class, const char *instance, |
---|
| 686 | ZWRITEOPTIONS *zoptions, const char *keyfile, int cipher) |
---|
[9a4077c] | 687 | { |
---|
| 688 | FILE *outfile = stdout; |
---|
| 689 | char *inbuff = NULL; |
---|
| 690 | int buflen; |
---|
| 691 | int out = TRUE; |
---|
| 692 | |
---|
| 693 | inbuff = GetInputBuffer(zoptions, &buflen); |
---|
| 694 | |
---|
| 695 | if(!inbuff) { |
---|
| 696 | fprintf(stderr, "Error reading zcrypt input!\n"); |
---|
| 697 | return FALSE; |
---|
| 698 | } |
---|
[edae037] | 699 | |
---|
[9a4077c] | 700 | if (zephyr) { |
---|
[edae037] | 701 | outfile = GetZephyrPipe(class, instance, zoptions); |
---|
| 702 | if (!outfile) |
---|
| 703 | { |
---|
[a08bfc3] | 704 | fprintf(stderr, "Could not run zwrite\n"); |
---|
[9a4077c] | 705 | if (inbuff) |
---|
[f7f35c0] | 706 | free(inbuff); |
---|
[edae037] | 707 | return FALSE; |
---|
| 708 | } |
---|
| 709 | } |
---|
| 710 | |
---|
[6d7f2a8] | 711 | out = ciphers[cipher].encrypt(keyfile, inbuff, buflen, outfile); |
---|
[9a4077c] | 712 | |
---|
| 713 | if (zephyr) |
---|
| 714 | CloseZephyrPipe(outfile); |
---|
| 715 | |
---|
| 716 | free(inbuff); |
---|
| 717 | return out; |
---|
| 718 | } |
---|
| 719 | |
---|
[e832a52] | 720 | int do_encrypt_des(const char *keyfile, const char *in, int length, FILE *outfile) |
---|
[9a4077c] | 721 | { |
---|
[9a0d25d] | 722 | DES_key_schedule schedule; |
---|
[9a4077c] | 723 | unsigned char input[8], output[8]; |
---|
[e832a52] | 724 | const char *inptr; |
---|
[9a4077c] | 725 | int num_blocks, last_block_size; |
---|
| 726 | char *keystring; |
---|
| 727 | int size; |
---|
| 728 | |
---|
| 729 | keystring = read_keystring(keyfile); |
---|
| 730 | if(!keystring) { |
---|
| 731 | return FALSE; |
---|
| 732 | } |
---|
| 733 | |
---|
[c836519] | 734 | owl_zcrypt_string_to_schedule(keystring, &schedule); |
---|
[9a4077c] | 735 | free(keystring); |
---|
| 736 | |
---|
| 737 | inptr = in; |
---|
| 738 | num_blocks = (length + 7) / 8; |
---|
| 739 | last_block_size = ((length + 7) % 8) + 1; |
---|
[edae037] | 740 | |
---|
| 741 | /* Encrypt the input (inbuff or stdin) and send it to outfile */ |
---|
| 742 | while (TRUE) |
---|
| 743 | { |
---|
[9a4077c] | 744 | /* Get 8 bytes from buffer */ |
---|
| 745 | if (num_blocks > 1) |
---|
[edae037] | 746 | { |
---|
[9a4077c] | 747 | size = 8; |
---|
| 748 | memcpy(input, inptr, size); |
---|
| 749 | inptr += 8; |
---|
| 750 | num_blocks--; |
---|
| 751 | } |
---|
| 752 | else if (num_blocks == 1) |
---|
| 753 | { |
---|
| 754 | size = last_block_size; |
---|
| 755 | memcpy(input, inptr, size); |
---|
| 756 | num_blocks--; |
---|
[edae037] | 757 | } |
---|
| 758 | else |
---|
[9a4077c] | 759 | size = 0; |
---|
[edae037] | 760 | |
---|
| 761 | /* Check for EOF and pad the string to 8 chars, if needed */ |
---|
| 762 | if (size == 0) |
---|
[9a4077c] | 763 | break; |
---|
[edae037] | 764 | if (size < 8) |
---|
| 765 | memset(input + size, 0, 8 - size); |
---|
| 766 | |
---|
| 767 | /* Encrypt and output the block */ |
---|
[9a0d25d] | 768 | DES_ecb_encrypt(&input, &output, &schedule, TRUE); |
---|
[edae037] | 769 | block_to_ascii(output, outfile); |
---|
| 770 | |
---|
| 771 | if (size < 8) |
---|
| 772 | break; |
---|
| 773 | } |
---|
| 774 | |
---|
[9a4077c] | 775 | putc('\n', outfile); |
---|
[edae037] | 776 | |
---|
[9a4077c] | 777 | return TRUE; |
---|
[edae037] | 778 | } |
---|
| 779 | |
---|
[e832a52] | 780 | int do_encrypt_aes(const char *keyfile, const char *in, int length, FILE *outfile) |
---|
[8bd190d] | 781 | { |
---|
| 782 | char *out; |
---|
| 783 | int err, status; |
---|
[396dc2c] | 784 | int tried_gpg1 = FALSE; |
---|
[8bd190d] | 785 | const char *argv[] = { |
---|
[396dc2c] | 786 | "gpg1", |
---|
[8bd190d] | 787 | "--symmetric", |
---|
[048b1ff] | 788 | "--no-options", |
---|
| 789 | "--no-default-keyring", |
---|
| 790 | "--keyring", "/dev/null", |
---|
| 791 | "--secret-keyring", "/dev/null", |
---|
[8bd190d] | 792 | "--batch", |
---|
| 793 | "--quiet", |
---|
| 794 | "--no-use-agent", |
---|
| 795 | "--armor", |
---|
| 796 | "--cipher-algo", "AES", |
---|
| 797 | "--passphrase-file", keyfile, |
---|
| 798 | NULL |
---|
| 799 | }; |
---|
[396dc2c] | 800 | while ((err = call_filter(argv, in, &out, &status)) && !out && !tried_gpg1) { |
---|
| 801 | tried_gpg1 = TRUE; |
---|
| 802 | argv[0] = "gpg"; |
---|
| 803 | } |
---|
[8bd190d] | 804 | if(err || status) { |
---|
[3b8a563] | 805 | g_free(out); |
---|
[8bd190d] | 806 | return FALSE; |
---|
| 807 | } |
---|
| 808 | fwrite(out, strlen(out), 1, outfile); |
---|
| 809 | g_free(out); |
---|
| 810 | return TRUE; |
---|
| 811 | } |
---|
| 812 | |
---|
[edae037] | 813 | /* Read a half-byte from stdin, skipping invalid characters. Returns -1 |
---|
| 814 | if at EOF or file error */ |
---|
[356465e] | 815 | int read_ascii_nybble(void) |
---|
[edae037] | 816 | { |
---|
| 817 | char c; |
---|
| 818 | |
---|
| 819 | while (TRUE) |
---|
| 820 | { |
---|
| 821 | if (fread(&c, 1, 1, stdin) == 0) |
---|
| 822 | return -1; |
---|
| 823 | else if (c >= BASE_CODE && c <= LAST_CODE) |
---|
| 824 | return c - BASE_CODE; |
---|
| 825 | } |
---|
| 826 | } |
---|
| 827 | |
---|
| 828 | /* Read both halves of the byte and return the single byte. Returns -1 |
---|
| 829 | if at EOF or file error. */ |
---|
[356465e] | 830 | int read_ascii_byte(void) |
---|
[edae037] | 831 | { |
---|
| 832 | int c1, c2; |
---|
| 833 | c1 = read_ascii_nybble(); |
---|
| 834 | if (c1 >= 0) |
---|
| 835 | { |
---|
| 836 | c2 = read_ascii_nybble(); |
---|
| 837 | if (c2 >= 0) |
---|
| 838 | { |
---|
| 839 | return c1 * 0x10 + c2; |
---|
| 840 | } |
---|
| 841 | } |
---|
| 842 | return -1; |
---|
| 843 | } |
---|
| 844 | |
---|
| 845 | /* Read an 8-byte DES block from stdin */ |
---|
[356465e] | 846 | int read_ascii_block(unsigned char *input) |
---|
[edae037] | 847 | { |
---|
| 848 | int c; |
---|
| 849 | |
---|
| 850 | int i; |
---|
| 851 | for (i = 0; i < 8; i++) |
---|
| 852 | { |
---|
| 853 | c = read_ascii_byte(); |
---|
| 854 | if (c < 0) |
---|
| 855 | return FALSE; |
---|
| 856 | |
---|
| 857 | input[i] = c; |
---|
| 858 | } |
---|
| 859 | |
---|
| 860 | return TRUE; |
---|
| 861 | } |
---|
| 862 | |
---|
| 863 | /* Decrypt stdin */ |
---|
[e832a52] | 864 | int do_decrypt(const char *keyfile, int cipher) |
---|
[edae037] | 865 | { |
---|
[6d7f2a8] | 866 | return ciphers[cipher].decrypt(keyfile); |
---|
[8bd190d] | 867 | } |
---|
| 868 | |
---|
[e832a52] | 869 | int do_decrypt_aes(const char *keyfile) { |
---|
[8bd190d] | 870 | char *in, *out; |
---|
| 871 | int length; |
---|
[396dc2c] | 872 | int tried_gpg1 = FALSE; |
---|
[8bd190d] | 873 | const char *argv[] = { |
---|
[396dc2c] | 874 | "gpg1", |
---|
[8bd190d] | 875 | "--decrypt", |
---|
[048b1ff] | 876 | "--no-options", |
---|
| 877 | "--no-default-keyring", |
---|
| 878 | "--keyring", "/dev/null", |
---|
| 879 | "--secret-keyring", "/dev/null", |
---|
[8bd190d] | 880 | "--batch", |
---|
| 881 | "--no-use-agent", |
---|
| 882 | "--quiet", |
---|
| 883 | "--passphrase-file", keyfile, |
---|
| 884 | NULL |
---|
| 885 | }; |
---|
| 886 | int err, status; |
---|
| 887 | |
---|
| 888 | in = slurp_stdin(TRUE, &length); |
---|
| 889 | if(!in) return FALSE; |
---|
| 890 | |
---|
[396dc2c] | 891 | while ((err = call_filter(argv, in, &out, &status)) && !out && !tried_gpg1) { |
---|
| 892 | tried_gpg1 = TRUE; |
---|
| 893 | argv[0] = "gpg"; |
---|
| 894 | } |
---|
[d72ba1e] | 895 | free(in); |
---|
[8bd190d] | 896 | if(err || status) { |
---|
[3b8a563] | 897 | g_free(out); |
---|
[8bd190d] | 898 | return FALSE; |
---|
| 899 | } |
---|
| 900 | fwrite(out, strlen(out), 1, stdout); |
---|
| 901 | g_free(out); |
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| 902 | |
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| 903 | return TRUE; |
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| 904 | } |
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| 905 | |
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[e832a52] | 906 | int do_decrypt_des(const char *keyfile) { |
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[9a0d25d] | 907 | DES_key_schedule schedule; |
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[356465e] | 908 | unsigned char input[8], output[8]; |
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[60fcd71] | 909 | char tmp[9]; |
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[8bd190d] | 910 | char *keystring; |
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[edae037] | 911 | |
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[60fcd71] | 912 | /* |
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| 913 | DES decrypts 8 bytes at a time. We copy those over into the 9-byte |
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| 914 | 'tmp', which has the final byte zeroed, to ensure that we always |
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| 915 | have a NULL-terminated string we can call printf/strlen on. |
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| 916 | |
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[9a0d25d] | 917 | We don't pass 'tmp' to DES_ecb_encrypt directly, because it's |
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[60fcd71] | 918 | prototyped as taking 'unsigned char[8]', and this avoids a stupid |
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| 919 | cast. |
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| 920 | |
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| 921 | We zero 'tmp' entirely, not just the final byte, in case there are |
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| 922 | no input blocks. |
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| 923 | */ |
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| 924 | memset(tmp, 0, sizeof tmp); |
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[edae037] | 925 | |
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[8bd190d] | 926 | keystring = read_keystring(keyfile); |
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| 927 | if(!keystring) return FALSE; |
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| 928 | |
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[c836519] | 929 | owl_zcrypt_string_to_schedule(keystring, &schedule); |
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[edae037] | 930 | |
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[8bd190d] | 931 | free(keystring); |
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| 932 | |
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[edae037] | 933 | while (read_ascii_block(input)) |
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| 934 | { |
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[9a0d25d] | 935 | DES_ecb_encrypt(&input, &output, &schedule, FALSE); |
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[60fcd71] | 936 | memcpy(tmp, output, 8); |
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| 937 | printf("%s", tmp); |
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[edae037] | 938 | } |
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| 939 | |
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[60fcd71] | 940 | if (!tmp[0] || tmp[strlen(tmp) - 1] != '\n') |
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[edae037] | 941 | printf("\n"); |
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[9a4077c] | 942 | return TRUE; |
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[edae037] | 943 | } |
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