[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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[478dc8e] | 18 | #include <getopt.h> |
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[edae037] | 19 | |
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[6249a88f] | 20 | #include <config.h> |
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[b094191] | 21 | |
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[49bc81e] | 22 | #ifdef HAVE_KERBEROS_IV |
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| 23 | #include <kerberosIV/des.h> |
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| 24 | #else |
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| 25 | #include <openssl/des.h> |
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| 26 | #endif |
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| 27 | |
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[8bd190d] | 28 | #include "filterproc.h" |
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| 29 | |
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[5175cf8] | 30 | #ifndef OWL_VERSION_STRING |
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| 31 | #ifdef GIT_VERSION |
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| 32 | #define stringify(x) __stringify(x) |
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| 33 | #define __stringify(x) #x |
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| 34 | #define OWL_VERSION_STRING stringify(GIT_VERSION) |
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| 35 | #else |
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| 36 | #define OWL_VERSION_STRING PACKAGE_VERSION |
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| 37 | #endif |
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| 38 | #endif /* !OWL_VERSION_STRING */ |
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| 39 | |
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[6829afc] | 40 | /* Annotate functions in which the caller owns the return value and is |
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| 41 | * responsible for ensuring it is freed. */ |
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| 42 | #define CALLER_OWN G_GNUC_WARN_UNUSED_RESULT |
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| 43 | |
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[8bd190d] | 44 | #define MAX_KEY 128 |
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| 45 | #define MAX_LINE 128 |
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| 46 | #define MAX_RESULT 4096 |
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[edae037] | 47 | |
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| 48 | #ifndef TRUE |
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| 49 | #define TRUE -1 |
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| 50 | #endif |
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| 51 | #ifndef FALSE |
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| 52 | #define FALSE 0 |
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| 53 | #endif |
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| 54 | |
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| 55 | #define ZWRITE_OPT_NOAUTH (1<<0) |
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| 56 | #define ZWRITE_OPT_SIGNATURE (1<<1) |
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| 57 | #define ZWRITE_OPT_IGNOREVARS (1<<2) |
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| 58 | #define ZWRITE_OPT_VERBOSE (1<<3) |
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| 59 | #define ZWRITE_OPT_QUIET (1<<4) |
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| 60 | #define ZCRYPT_OPT_MESSAGE (1<<5) |
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| 61 | #define ZCRYPT_OPT_IGNOREDOT (1<<6) |
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| 62 | |
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| 63 | typedef struct |
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| 64 | { |
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| 65 | int flags; |
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[1dd285b] | 66 | const char *signature; |
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[edae037] | 67 | char *message; |
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| 68 | } ZWRITEOPTIONS; |
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| 69 | |
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[6829afc] | 70 | CALLER_OWN char *GetZephyrVarKeyFile(const char *whoami, const char *class, const char *instance); |
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[e832a52] | 71 | int ParseCryptSpec(const char *spec, const char **keyfile); |
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[6829afc] | 72 | CALLER_OWN char *BuildArgString(char **argv, int start, int end); |
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| 73 | CALLER_OWN char *read_keystring(const char *keyfile); |
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[8bd190d] | 74 | |
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[e832a52] | 75 | int do_encrypt(int zephyr, const char *class, const char *instance, |
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| 76 | ZWRITEOPTIONS *zoptions, const char* keyfile, int cipher); |
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| 77 | int do_encrypt_des(const char *keyfile, const char *in, int len, FILE *out); |
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| 78 | int do_encrypt_aes(const char *keyfile, const char *in, int len, FILE *out); |
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[8bd190d] | 79 | |
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[e832a52] | 80 | int do_decrypt(const char *keyfile, int cipher); |
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| 81 | int do_decrypt_aes(const char *keyfile); |
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| 82 | int do_decrypt_des(const char *keyfile); |
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[8bd190d] | 83 | |
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[edae037] | 84 | |
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| 85 | #define M_NONE 0 |
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| 86 | #define M_ZEPHYR_ENCRYPT 1 |
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| 87 | #define M_DECRYPT 2 |
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| 88 | #define M_ENCRYPT 3 |
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| 89 | #define M_RANDOMIZE 4 |
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| 90 | #define M_SETKEY 5 |
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| 91 | |
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[6d7f2a8] | 92 | enum cipher_algo { |
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| 93 | CIPHER_DES, |
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| 94 | CIPHER_AES, |
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| 95 | NCIPHER |
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| 96 | }; |
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| 97 | |
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| 98 | typedef struct { |
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[e832a52] | 99 | int (*encrypt)(const char *keyfile, const char *in, int len, FILE *out); |
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| 100 | int (*decrypt)(const char *keyfile); |
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[6d7f2a8] | 101 | } cipher_pair; |
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| 102 | |
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| 103 | cipher_pair ciphers[NCIPHER] = { |
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[3c2c7fc] | 104 | [CIPHER_DES] = { do_encrypt_des, do_decrypt_des}, |
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| 105 | [CIPHER_AES] = { do_encrypt_aes, do_decrypt_aes}, |
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[6d7f2a8] | 106 | }; |
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[9a4077c] | 107 | |
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[c836519] | 108 | static void owl_zcrypt_string_to_schedule(char *keystring, des_key_schedule *schedule) { |
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[356465e] | 109 | #ifdef HAVE_KERBEROS_IV |
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| 110 | des_cblock key; |
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| 111 | #else |
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| 112 | des_cblock _key, *key = &_key; |
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| 113 | #endif |
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| 114 | |
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| 115 | des_string_to_key(keystring, key); |
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[c836519] | 116 | des_key_sched(key, *schedule); |
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[356465e] | 117 | } |
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| 118 | |
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| 119 | int main(int argc, char *argv[]) |
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[edae037] | 120 | { |
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[9a4077c] | 121 | char *cryptspec = NULL; |
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[e832a52] | 122 | const char *keyfile; |
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[9a4077c] | 123 | int cipher; |
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[edae037] | 124 | int error = FALSE; |
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| 125 | int zephyr = FALSE; |
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[1dd285b] | 126 | const char *class = NULL, *instance = NULL; |
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[edae037] | 127 | int mode = M_NONE; |
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| 128 | |
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[478dc8e] | 129 | int c; |
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[edae037] | 130 | |
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| 131 | int messageflag = FALSE; |
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| 132 | ZWRITEOPTIONS zoptions; |
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| 133 | zoptions.flags = 0; |
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| 134 | |
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[5175cf8] | 135 | enum { |
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| 136 | OPT_VERSION = CHAR_MAX + 1, |
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| 137 | }; |
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[478dc8e] | 138 | static const struct option options[] = { |
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[5175cf8] | 139 | {"version", no_argument, NULL, OPT_VERSION}, |
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[478dc8e] | 140 | {NULL, 0, NULL, 0} |
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| 141 | }; |
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| 142 | |
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| 143 | while ((c = getopt_long(argc, argv, "ZDERSF:c:i:advqtluons:f:m", options, NULL)) != -1) |
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[edae037] | 144 | { |
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| 145 | switch(c) |
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| 146 | { |
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[5175cf8] | 147 | case OPT_VERSION: |
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| 148 | /* Version */ |
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| 149 | printf("This is zcrypt version %s\n", OWL_VERSION_STRING); |
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| 150 | exit(0); |
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[edae037] | 151 | case 'Z': |
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| 152 | /* Zephyr encrypt */ |
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| 153 | mode = M_ZEPHYR_ENCRYPT; |
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[f7f35c0] | 154 | break; |
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[edae037] | 155 | case 'D': |
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| 156 | /* Decrypt */ |
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[f7f35c0] | 157 | mode = M_DECRYPT; |
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| 158 | break; |
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[edae037] | 159 | case 'E': |
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[f7f35c0] | 160 | /* Encrypt */ |
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| 161 | mode = M_ENCRYPT; |
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| 162 | break; |
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[edae037] | 163 | case 'R': |
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[f7f35c0] | 164 | /* Randomize the keyfile */ |
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| 165 | mode = M_RANDOMIZE; |
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| 166 | break; |
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[edae037] | 167 | case 'S': |
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[f7f35c0] | 168 | /* Set a new key value from stdin */ |
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| 169 | mode = M_SETKEY; |
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| 170 | break; |
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[edae037] | 171 | case 'F': |
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[f7f35c0] | 172 | /* Specify the keyfile explicitly */ |
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[9a4077c] | 173 | if (cryptspec != NULL) error = TRUE; |
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| 174 | cryptspec = optarg; |
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[f7f35c0] | 175 | break; |
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[edae037] | 176 | case 'c': |
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[f7f35c0] | 177 | /* Zwrite/zcrypt: class name */ |
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| 178 | if (class != NULL) error = TRUE; |
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| 179 | class = optarg; |
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| 180 | break; |
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[edae037] | 181 | case 'i': |
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[f7f35c0] | 182 | /* Zwrite/zcrypt: instance name */ |
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| 183 | if (instance != NULL) error = TRUE; |
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| 184 | instance = optarg; |
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| 185 | break; |
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[edae037] | 186 | case 'a': |
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[f7f35c0] | 187 | /* Zwrite: authenticate (default) */ |
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| 188 | zoptions.flags &= ~ZWRITE_OPT_NOAUTH; |
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| 189 | break; |
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[edae037] | 190 | case 'd': |
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[f7f35c0] | 191 | /* Zwrite: do not authenticate */ |
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| 192 | zoptions.flags |= ZWRITE_OPT_NOAUTH; |
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| 193 | break; |
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[edae037] | 194 | case 'v': |
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[f7f35c0] | 195 | /* Zwrite: verbose */ |
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| 196 | zoptions.flags |= ZWRITE_OPT_VERBOSE; |
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| 197 | break; |
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[edae037] | 198 | case 'q': |
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[f7f35c0] | 199 | /* Zwrite: quiet */ |
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| 200 | zoptions.flags |= ZWRITE_OPT_QUIET; |
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| 201 | break; |
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[edae037] | 202 | case 't': |
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[f7f35c0] | 203 | /* Zwrite: no expand tabs (ignored) */ |
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| 204 | break; |
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[edae037] | 205 | case 'l': |
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[f7f35c0] | 206 | /* Zwrite: ignore '.' on a line by itself (ignored) */ |
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| 207 | zoptions.flags |= ZCRYPT_OPT_IGNOREDOT; |
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| 208 | break; |
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[edae037] | 209 | case 'u': |
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[f7f35c0] | 210 | /* Zwrite: urgent message */ |
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| 211 | instance = "URGENT"; |
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| 212 | break; |
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[edae037] | 213 | case 'o': |
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[f7f35c0] | 214 | /* Zwrite: ignore zephyr variables zwrite-class, zwrite-inst, */ |
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| 215 | /* zwrite-opcode */ |
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| 216 | zoptions.flags |= ZWRITE_OPT_IGNOREVARS; |
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| 217 | break; |
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[edae037] | 218 | case 'n': |
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[f7f35c0] | 219 | /* Zwrite: prevent PING message (always used) */ |
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| 220 | break; |
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[edae037] | 221 | case 's': |
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[f7f35c0] | 222 | /* Zwrite: signature */ |
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| 223 | zoptions.flags |= ZWRITE_OPT_SIGNATURE; |
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| 224 | zoptions.signature = optarg; |
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| 225 | break; |
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[edae037] | 226 | case 'f': |
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[f7f35c0] | 227 | /* Zwrite: file system specification (ignored) */ |
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| 228 | break; |
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[edae037] | 229 | case 'm': |
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[f7f35c0] | 230 | /* Message on rest of line*/ |
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| 231 | messageflag = TRUE; |
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| 232 | break; |
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[edae037] | 233 | case '?': |
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[f7f35c0] | 234 | error = TRUE; |
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| 235 | break; |
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[edae037] | 236 | } |
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| 237 | if (error || messageflag) |
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| 238 | break; |
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| 239 | } |
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| 240 | |
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| 241 | if (class != NULL || instance != NULL) |
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| 242 | zephyr = TRUE; |
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| 243 | |
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| 244 | if (messageflag) |
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| 245 | { |
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| 246 | zoptions.flags |= ZCRYPT_OPT_MESSAGE; |
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| 247 | zoptions.message = BuildArgString(argv, optind, argc); |
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| 248 | if (!zoptions.message) |
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| 249 | { |
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[a08bfc3] | 250 | fprintf(stderr, "Memory allocation error.\n"); |
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[edae037] | 251 | error = TRUE; |
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| 252 | } |
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| 253 | } |
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| 254 | else if (optind < argc) |
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| 255 | { |
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| 256 | error = TRUE; |
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| 257 | } |
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| 258 | |
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| 259 | if (mode == M_NONE) |
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| 260 | mode = (zephyr?M_ZEPHYR_ENCRYPT:M_ENCRYPT); |
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| 261 | |
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| 262 | if (mode == M_ZEPHYR_ENCRYPT && !zephyr) |
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| 263 | error = TRUE; |
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| 264 | |
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[9a4077c] | 265 | if (!error && cryptspec == NULL && (class != NULL || instance != NULL)) { |
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| 266 | cryptspec = GetZephyrVarKeyFile(argv[0], class, instance); |
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| 267 | if(!cryptspec) { |
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| 268 | fprintf(stderr, "Unable to find keyfile for "); |
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| 269 | if(class != NULL) { |
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| 270 | fprintf(stderr, "-c %s ", class); |
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| 271 | } |
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| 272 | if(instance != NULL) { |
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| 273 | fprintf(stderr, "-i %s ", instance); |
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| 274 | } |
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| 275 | fprintf(stderr, "\n"); |
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| 276 | exit(-1); |
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| 277 | } |
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| 278 | } |
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| 279 | |
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[7ba7d66] | 280 | if (error || !cryptspec) |
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[edae037] | 281 | { |
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[a08bfc3] | 282 | fprintf(stderr, "Usage: %s [-Z|-D|-E|-R|-S] [-F Keyfile] [-c class] [-i instance]\n", argv[0]); |
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| 283 | fprintf(stderr, " [-advqtluon] [-s signature] [-f arg] [-m message]\n"); |
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| 284 | fprintf(stderr, " One or more of class, instance, and keyfile must be specified.\n"); |
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[4133e34] | 285 | exit(1); |
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| 286 | } |
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[9a4077c] | 287 | |
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| 288 | cipher = ParseCryptSpec(cryptspec, &keyfile); |
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| 289 | if(cipher < 0) { |
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| 290 | fprintf(stderr, "Invalid cipher specification: %s\n", cryptspec); |
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[4133e34] | 291 | exit(1); |
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[edae037] | 292 | } |
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[9a4077c] | 293 | |
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| 294 | |
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| 295 | if (mode == M_RANDOMIZE) |
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[edae037] | 296 | { |
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[9a4077c] | 297 | /* Choose a new, random key */ |
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| 298 | /* |
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[edae037] | 299 | FILE *fkey = fopen(fname, "w"); |
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| 300 | if (!fkey) |
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[9a4077c] | 301 | printf("Could not open key file for writing: %s\n", fname); |
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[edae037] | 302 | else |
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| 303 | { |
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[9a4077c] | 304 | char string[100]; |
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| 305 | fputs(fkey, string); |
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| 306 | fclose(fkey); |
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[356465e] | 307 | } |
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[9a4077c] | 308 | */ |
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| 309 | fprintf(stderr, "Feature not yet implemented.\n"); |
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| 310 | } |
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| 311 | else if (mode == M_SETKEY) |
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| 312 | { |
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| 313 | /* Set a new, user-entered key */ |
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| 314 | char newkey[MAX_KEY]; |
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| 315 | FILE *fkey; |
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[edae037] | 316 | |
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[9a4077c] | 317 | if (isatty(0)) |
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| 318 | { |
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| 319 | printf("Enter new key: "); |
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| 320 | /* Really should read without echo!!! */ |
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| 321 | } |
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| 322 | if(!fgets(newkey, MAX_KEY - 1, stdin)) { |
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| 323 | fprintf(stderr, "Error reading key.\n"); |
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| 324 | return 1; |
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[edae037] | 325 | } |
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[9a4077c] | 326 | |
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| 327 | fkey = fopen(keyfile, "w"); |
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| 328 | if (!fkey) |
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| 329 | fprintf(stderr, "Could not open key file for writing: %s\n", keyfile); |
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[edae037] | 330 | else |
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| 331 | { |
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[9a4077c] | 332 | if (fputs(newkey, fkey) != strlen(newkey) || putc('\n', fkey) != '\n') |
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| 333 | { |
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| 334 | fprintf(stderr, "Error writing to key file.\n"); |
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| 335 | fclose(fkey); |
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[4133e34] | 336 | exit(1); |
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| 337 | } |
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[edae037] | 338 | else |
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| 339 | { |
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[f7f35c0] | 340 | fclose(fkey); |
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[9a4077c] | 341 | fprintf(stderr, "Key update complete.\n"); |
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[edae037] | 342 | } |
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| 343 | } |
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| 344 | } |
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[9a4077c] | 345 | else |
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| 346 | { |
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| 347 | if (mode == M_ZEPHYR_ENCRYPT || mode == M_ENCRYPT) |
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[8bd190d] | 348 | error = !do_encrypt((mode == M_ZEPHYR_ENCRYPT), class, instance, |
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| 349 | &zoptions, keyfile, cipher); |
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[9a4077c] | 350 | else |
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[8bd190d] | 351 | error = !do_decrypt(keyfile, cipher); |
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[9a4077c] | 352 | } |
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[edae037] | 353 | |
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| 354 | /* Always print the **END** message if -D is specified. */ |
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| 355 | if (mode == M_DECRYPT) |
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| 356 | printf("**END**\n"); |
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[8bd190d] | 357 | |
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| 358 | return error; |
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[edae037] | 359 | } |
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| 360 | |
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[e832a52] | 361 | int ParseCryptSpec(const char *spec, const char **keyfile) { |
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[8bd190d] | 362 | int cipher = CIPHER_DES; |
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| 363 | char *cipher_name = strdup(spec); |
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| 364 | char *colon = strchr(cipher_name, ':'); |
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| 365 | |
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[9a4077c] | 366 | *keyfile = spec; |
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[8bd190d] | 367 | |
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| 368 | if (colon) { |
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| 369 | char *rest = strchr(spec, ':') + 1; |
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| 370 | while(isspace(*rest)) rest++; |
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| 371 | |
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| 372 | *colon-- = '\0'; |
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| 373 | while (colon >= cipher_name && isspace(*colon)) { |
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| 374 | *colon = '\0'; |
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| 375 | } |
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| 376 | |
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| 377 | if(strcmp(cipher_name, "AES") == 0) { |
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| 378 | cipher = CIPHER_AES; |
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| 379 | *keyfile = rest; |
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| 380 | } else if(strcmp(cipher_name, "DES") == 0) { |
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| 381 | cipher = CIPHER_DES; |
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| 382 | *keyfile = rest; |
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| 383 | } |
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| 384 | } |
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| 385 | |
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| 386 | free(cipher_name); |
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| 387 | |
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| 388 | return cipher; |
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[9a4077c] | 389 | } |
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| 390 | |
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[edae037] | 391 | /* Build a space-separated string from argv from elements between start * |
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| 392 | * and end - 1. malloc()'s the returned string. */ |
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[6829afc] | 393 | CALLER_OWN char *BuildArgString(char **argv, int start, int end) |
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[edae037] | 394 | { |
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| 395 | int len = 1; |
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| 396 | int i; |
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| 397 | char *result; |
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| 398 | |
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| 399 | /* Compute the length of the string. (Plus 1 or 2) */ |
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| 400 | for (i = start; i < end; i++) |
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| 401 | len += strlen(argv[i]) + 1; |
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| 402 | |
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| 403 | /* Allocate memory */ |
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| 404 | result = (char *)malloc(len); |
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| 405 | if (result) |
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| 406 | { |
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| 407 | /* Build the string */ |
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| 408 | char *ptr = result; |
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| 409 | /* Start with an empty string, in case nothing is copied. */ |
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| 410 | *ptr = '\0'; |
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| 411 | /* Copy the arguments */ |
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| 412 | for (i = start; i < end; i++) |
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| 413 | { |
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| 414 | char *temp = argv[i]; |
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| 415 | /* Add a space, if not the first argument */ |
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| 416 | if (i != start) |
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[f7f35c0] | 417 | *ptr++ = ' '; |
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[edae037] | 418 | /* Copy argv[i], leaving ptr pointing to the '\0' copied from temp */ |
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[356465e] | 419 | while ((*ptr = *temp++)) |
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[f7f35c0] | 420 | ptr++; |
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[edae037] | 421 | } |
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| 422 | } |
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| 423 | |
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| 424 | return result; |
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| 425 | } |
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| 426 | |
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| 427 | #define MAX_BUFF 258 |
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| 428 | #define MAX_SEARCH 3 |
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| 429 | /* Find the class/instance in the .crypt-table */ |
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[6829afc] | 430 | CALLER_OWN char *GetZephyrVarKeyFile(const char *whoami, const char *class, const char *instance) |
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[edae037] | 431 | { |
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[356465e] | 432 | char *keyfile = NULL; |
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[6b1c3b6] | 433 | char *varname[MAX_SEARCH]; |
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[edae037] | 434 | int length[MAX_SEARCH], i; |
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| 435 | char buffer[MAX_BUFF]; |
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[c6332f5] | 436 | const char *home; |
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[6b1c3b6] | 437 | char *filename; |
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[edae037] | 438 | char result[MAX_SEARCH][MAX_BUFF]; |
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| 439 | int numsearch = 0; |
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| 440 | FILE *fsearch; |
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| 441 | |
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[6b1c3b6] | 442 | memset(varname, 0, sizeof(varname)); |
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| 443 | |
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[edae037] | 444 | /* Determine names to look for in .crypt-table */ |
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| 445 | if (instance) |
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[6b1c3b6] | 446 | varname[numsearch++] = g_strdup_printf("crypt-%s-%s:", (class?class:"message"), instance); |
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[edae037] | 447 | if (class) |
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[6b1c3b6] | 448 | varname[numsearch++] = g_strdup_printf("crypt-%s:", class); |
---|
| 449 | varname[numsearch++] = g_strdup("crypt-default:"); |
---|
[edae037] | 450 | |
---|
| 451 | /* Setup the result array, and determine string lengths */ |
---|
| 452 | for (i = 0; i < numsearch; i++) |
---|
| 453 | { |
---|
| 454 | result[i][0] = '\0'; |
---|
| 455 | length[i] = strlen(varname[i]); |
---|
| 456 | } |
---|
| 457 | |
---|
| 458 | /* Open~/.crypt-table */ |
---|
[c6332f5] | 459 | home = getenv("HOME"); |
---|
| 460 | if (home == NULL) |
---|
| 461 | home = g_get_home_dir(); |
---|
[dde1b4d] | 462 | filename = g_build_filename(home, ".crypt-table", NULL); |
---|
[edae037] | 463 | fsearch = fopen(filename, "r"); |
---|
| 464 | if (fsearch) |
---|
| 465 | { |
---|
| 466 | /* Scan file for a match */ |
---|
| 467 | while (!feof(fsearch)) |
---|
| 468 | { |
---|
[356465e] | 469 | if (!fgets(buffer, MAX_BUFF - 3, fsearch)) break; |
---|
[edae037] | 470 | for (i = 0; i < numsearch; i++) |
---|
[f7f35c0] | 471 | if (strncasecmp(varname[i], buffer, length[i]) == 0) |
---|
| 472 | { |
---|
| 473 | int j; |
---|
| 474 | for (j = length[i]; buffer[j] == ' '; j++) |
---|
| 475 | ; |
---|
| 476 | strcpy(result[i], &buffer[j]); |
---|
| 477 | if (*result[i]) |
---|
| 478 | if (result[i][strlen(result[i])-1] == '\n') |
---|
| 479 | result[i][strlen(result[i])-1] = '\0'; |
---|
| 480 | } |
---|
[edae037] | 481 | } |
---|
| 482 | |
---|
| 483 | /* Pick the "best" match found */ |
---|
| 484 | keyfile = NULL; |
---|
| 485 | for (i = 0; i < numsearch; i++) |
---|
| 486 | if (*result[i]) |
---|
| 487 | { |
---|
[f7f35c0] | 488 | keyfile = result[i]; |
---|
| 489 | break; |
---|
[edae037] | 490 | } |
---|
| 491 | |
---|
[9a4077c] | 492 | if (keyfile != NULL) |
---|
[edae037] | 493 | { |
---|
| 494 | /* Prepare result to be returned */ |
---|
| 495 | char *temp = keyfile; |
---|
| 496 | keyfile = (char *)malloc(strlen(temp) + 1); |
---|
| 497 | if (keyfile) |
---|
[f7f35c0] | 498 | strcpy(keyfile, temp); |
---|
[edae037] | 499 | else |
---|
[f7f35c0] | 500 | fprintf(stderr, "Memory allocation error.\n"); |
---|
[edae037] | 501 | } |
---|
| 502 | fclose(fsearch); |
---|
| 503 | } |
---|
| 504 | else |
---|
[a08bfc3] | 505 | fprintf(stderr, "Could not open key table file: %s\n", filename); |
---|
[edae037] | 506 | |
---|
[6b1c3b6] | 507 | for(i = 0; i < MAX_SEARCH; i++) { |
---|
[3b8a563] | 508 | g_free(varname[i]); |
---|
[6b1c3b6] | 509 | } |
---|
| 510 | |
---|
[3b8a563] | 511 | g_free(filename); |
---|
[6b1c3b6] | 512 | |
---|
[edae037] | 513 | return keyfile; |
---|
| 514 | } |
---|
| 515 | |
---|
| 516 | static pid_t zephyrpipe_pid = 0; |
---|
| 517 | |
---|
| 518 | /* Open a pipe to zwrite */ |
---|
[e832a52] | 519 | FILE *GetZephyrPipe(const char *class, const char *instance, const ZWRITEOPTIONS *zoptions) |
---|
[edae037] | 520 | { |
---|
| 521 | int fildes[2]; |
---|
| 522 | pid_t pid; |
---|
| 523 | FILE *result; |
---|
[e832a52] | 524 | const char *argv[20]; |
---|
[356465e] | 525 | int argc = 0; |
---|
[edae037] | 526 | |
---|
| 527 | if (pipe(fildes) < 0) |
---|
| 528 | return NULL; |
---|
| 529 | pid = fork(); |
---|
| 530 | |
---|
| 531 | if (pid < 0) |
---|
| 532 | { |
---|
| 533 | /* Error: clean up */ |
---|
| 534 | close(fildes[0]); |
---|
| 535 | close(fildes[1]); |
---|
| 536 | result = NULL; |
---|
| 537 | } |
---|
| 538 | else if (pid == 0) |
---|
| 539 | { |
---|
| 540 | /* Setup child process */ |
---|
| 541 | argv[argc++] = "zwrite"; |
---|
| 542 | argv[argc++] = "-n"; /* Always send without ping */ |
---|
| 543 | if (class) |
---|
| 544 | { |
---|
| 545 | argv[argc++] = "-c"; |
---|
| 546 | argv[argc++] = class; |
---|
| 547 | } |
---|
| 548 | if (instance) |
---|
| 549 | { |
---|
| 550 | argv[argc++] = "-i"; |
---|
| 551 | argv[argc++] = instance; |
---|
| 552 | } |
---|
| 553 | if (zoptions->flags & ZWRITE_OPT_NOAUTH) |
---|
| 554 | argv[argc++] = "-d"; |
---|
| 555 | if (zoptions->flags & ZWRITE_OPT_QUIET) |
---|
| 556 | argv[argc++] = "-q"; |
---|
| 557 | if (zoptions->flags & ZWRITE_OPT_VERBOSE) |
---|
| 558 | argv[argc++] = "-v"; |
---|
| 559 | if (zoptions->flags & ZWRITE_OPT_SIGNATURE) |
---|
| 560 | { |
---|
| 561 | argv[argc++] = "-s"; |
---|
| 562 | argv[argc++] = zoptions->signature; |
---|
| 563 | } |
---|
| 564 | argv[argc++] = "-O"; |
---|
| 565 | argv[argc++] = "crypt"; |
---|
| 566 | argv[argc] = NULL; |
---|
| 567 | close(fildes[1]); |
---|
| 568 | if (fildes[0] != STDIN_FILENO) |
---|
| 569 | { |
---|
| 570 | if (dup2(fildes[0], STDIN_FILENO) != STDIN_FILENO) |
---|
[f7f35c0] | 571 | exit(0); |
---|
[edae037] | 572 | close(fildes[0]); |
---|
| 573 | } |
---|
| 574 | close(fildes[0]); |
---|
[e832a52] | 575 | execvp(argv[0], (char **)argv); |
---|
[a08bfc3] | 576 | fprintf(stderr, "Exec error: could not run zwrite\n"); |
---|
[edae037] | 577 | exit(0); |
---|
| 578 | } |
---|
| 579 | else |
---|
| 580 | { |
---|
| 581 | close(fildes[0]); |
---|
| 582 | /* Create a FILE * for the zwrite pipe */ |
---|
| 583 | result = (FILE *)fdopen(fildes[1], "w"); |
---|
| 584 | zephyrpipe_pid = pid; |
---|
| 585 | } |
---|
| 586 | |
---|
| 587 | return result; |
---|
| 588 | } |
---|
| 589 | |
---|
| 590 | /* Close the pipe to zwrite */ |
---|
[356465e] | 591 | void CloseZephyrPipe(FILE *pipe) |
---|
[edae037] | 592 | { |
---|
| 593 | fclose(pipe); |
---|
| 594 | waitpid(zephyrpipe_pid, NULL, 0); |
---|
| 595 | zephyrpipe_pid = 0; |
---|
| 596 | } |
---|
| 597 | |
---|
| 598 | #define BASE_CODE 70 |
---|
| 599 | #define LAST_CODE (BASE_CODE + 15) |
---|
| 600 | #define OUTPUT_BLOCK_SIZE 16 |
---|
| 601 | |
---|
[356465e] | 602 | void block_to_ascii(unsigned char *output, FILE *outfile) |
---|
[edae037] | 603 | { |
---|
| 604 | int i; |
---|
| 605 | for (i = 0; i < 8; i++) |
---|
| 606 | { |
---|
| 607 | putc(((output[i] & 0xf0) >> 4) + BASE_CODE, outfile); |
---|
| 608 | putc( (output[i] & 0x0f) + BASE_CODE, outfile); |
---|
| 609 | } |
---|
| 610 | } |
---|
| 611 | |
---|
[6829afc] | 612 | CALLER_OWN char *slurp_stdin(int ignoredot, int *length) { |
---|
[9a4077c] | 613 | char *buf; |
---|
| 614 | char *inptr; |
---|
[edae037] | 615 | |
---|
[8bd190d] | 616 | if ((inptr = buf = (char *)malloc(MAX_RESULT)) == NULL) |
---|
| 617 | { |
---|
| 618 | fprintf(stderr, "Memory allocation error\n"); |
---|
| 619 | return NULL; |
---|
| 620 | } |
---|
| 621 | while (inptr - buf < MAX_RESULT - MAX_LINE - 20) |
---|
| 622 | { |
---|
| 623 | if (fgets(inptr, MAX_LINE, stdin) == NULL) |
---|
| 624 | break; |
---|
| 625 | |
---|
| 626 | if (inptr[0]) |
---|
| 627 | { |
---|
| 628 | if (inptr[0] == '.' && inptr[1] == '\n' && !ignoredot) |
---|
| 629 | { |
---|
| 630 | inptr[0] = '\0'; |
---|
| 631 | break; |
---|
| 632 | } |
---|
| 633 | else |
---|
| 634 | inptr += strlen(inptr); |
---|
| 635 | } |
---|
| 636 | else |
---|
| 637 | break; |
---|
| 638 | } |
---|
| 639 | *length = inptr - buf; |
---|
| 640 | |
---|
| 641 | return buf; |
---|
| 642 | } |
---|
| 643 | |
---|
[6829afc] | 644 | CALLER_OWN char *GetInputBuffer(ZWRITEOPTIONS *zoptions, int *length) { |
---|
[8bd190d] | 645 | char *buf; |
---|
| 646 | |
---|
[9a4077c] | 647 | if (zoptions->flags & ZCRYPT_OPT_MESSAGE) |
---|
[edae037] | 648 | { |
---|
[9a4077c] | 649 | /* Use the -m message */ |
---|
| 650 | buf = strdup(zoptions->message); |
---|
| 651 | *length = strlen(buf); |
---|
| 652 | } |
---|
| 653 | else |
---|
| 654 | { |
---|
| 655 | if (isatty(0)) { |
---|
[edae037] | 656 | /* tty input, so show the "Type your message now..." message */ |
---|
| 657 | if (zoptions->flags & ZCRYPT_OPT_IGNOREDOT) |
---|
[f7f35c0] | 658 | printf("Type your message now. End with the end-of-file character.\n"); |
---|
[edae037] | 659 | else |
---|
[f7f35c0] | 660 | printf("Type your message now. End with control-D or a dot on a line by itself.\n"); |
---|
[9a4077c] | 661 | } else { |
---|
| 662 | zoptions->flags |= ZCRYPT_OPT_IGNOREDOT; |
---|
| 663 | } |
---|
| 664 | |
---|
[8bd190d] | 665 | buf = slurp_stdin(zoptions->flags & ZCRYPT_OPT_IGNOREDOT, length); |
---|
[9a4077c] | 666 | } |
---|
| 667 | return buf; |
---|
| 668 | } |
---|
| 669 | |
---|
[6829afc] | 670 | CALLER_OWN char *read_keystring(const char *keyfile) { |
---|
[9a4077c] | 671 | char *keystring; |
---|
| 672 | FILE *fkey = fopen(keyfile, "r"); |
---|
| 673 | if(!fkey) { |
---|
| 674 | fprintf(stderr, "Unable to open keyfile %s\n", keyfile); |
---|
| 675 | return NULL; |
---|
| 676 | } |
---|
| 677 | keystring = malloc(MAX_KEY); |
---|
| 678 | if(!fgets(keystring, MAX_KEY-1, fkey)) { |
---|
| 679 | fprintf(stderr, "Unable to read from keyfile: %s\n", keyfile); |
---|
| 680 | free(keystring); |
---|
| 681 | keystring = NULL; |
---|
| 682 | } |
---|
| 683 | fclose(fkey); |
---|
| 684 | return keystring; |
---|
| 685 | } |
---|
| 686 | |
---|
| 687 | /* Encrypt stdin, with prompt if isatty, and send to stdout, or to zwrite |
---|
| 688 | if zephyr is set. */ |
---|
[e832a52] | 689 | int do_encrypt(int zephyr, const char *class, const char *instance, |
---|
| 690 | ZWRITEOPTIONS *zoptions, const char *keyfile, int cipher) |
---|
[9a4077c] | 691 | { |
---|
| 692 | FILE *outfile = stdout; |
---|
| 693 | char *inbuff = NULL; |
---|
| 694 | int buflen; |
---|
| 695 | int out = TRUE; |
---|
| 696 | |
---|
| 697 | inbuff = GetInputBuffer(zoptions, &buflen); |
---|
| 698 | |
---|
| 699 | if(!inbuff) { |
---|
| 700 | fprintf(stderr, "Error reading zcrypt input!\n"); |
---|
| 701 | return FALSE; |
---|
| 702 | } |
---|
[edae037] | 703 | |
---|
[9a4077c] | 704 | if (zephyr) { |
---|
[edae037] | 705 | outfile = GetZephyrPipe(class, instance, zoptions); |
---|
| 706 | if (!outfile) |
---|
| 707 | { |
---|
[a08bfc3] | 708 | fprintf(stderr, "Could not run zwrite\n"); |
---|
[9a4077c] | 709 | if (inbuff) |
---|
[f7f35c0] | 710 | free(inbuff); |
---|
[edae037] | 711 | return FALSE; |
---|
| 712 | } |
---|
| 713 | } |
---|
| 714 | |
---|
[6d7f2a8] | 715 | out = ciphers[cipher].encrypt(keyfile, inbuff, buflen, outfile); |
---|
[9a4077c] | 716 | |
---|
| 717 | if (zephyr) |
---|
| 718 | CloseZephyrPipe(outfile); |
---|
| 719 | |
---|
| 720 | free(inbuff); |
---|
| 721 | return out; |
---|
| 722 | } |
---|
| 723 | |
---|
[e832a52] | 724 | int do_encrypt_des(const char *keyfile, const char *in, int length, FILE *outfile) |
---|
[9a4077c] | 725 | { |
---|
| 726 | des_key_schedule schedule; |
---|
| 727 | unsigned char input[8], output[8]; |
---|
[e832a52] | 728 | const char *inptr; |
---|
[9a4077c] | 729 | int num_blocks, last_block_size; |
---|
| 730 | char *keystring; |
---|
| 731 | int size; |
---|
| 732 | |
---|
| 733 | keystring = read_keystring(keyfile); |
---|
| 734 | if(!keystring) { |
---|
| 735 | return FALSE; |
---|
| 736 | } |
---|
| 737 | |
---|
[c836519] | 738 | owl_zcrypt_string_to_schedule(keystring, &schedule); |
---|
[9a4077c] | 739 | free(keystring); |
---|
| 740 | |
---|
| 741 | inptr = in; |
---|
| 742 | num_blocks = (length + 7) / 8; |
---|
| 743 | last_block_size = ((length + 7) % 8) + 1; |
---|
[edae037] | 744 | |
---|
| 745 | /* Encrypt the input (inbuff or stdin) and send it to outfile */ |
---|
| 746 | while (TRUE) |
---|
| 747 | { |
---|
[9a4077c] | 748 | /* Get 8 bytes from buffer */ |
---|
| 749 | if (num_blocks > 1) |
---|
[edae037] | 750 | { |
---|
[9a4077c] | 751 | size = 8; |
---|
| 752 | memcpy(input, inptr, size); |
---|
| 753 | inptr += 8; |
---|
| 754 | num_blocks--; |
---|
| 755 | } |
---|
| 756 | else if (num_blocks == 1) |
---|
| 757 | { |
---|
| 758 | size = last_block_size; |
---|
| 759 | memcpy(input, inptr, size); |
---|
| 760 | num_blocks--; |
---|
[edae037] | 761 | } |
---|
| 762 | else |
---|
[9a4077c] | 763 | size = 0; |
---|
[edae037] | 764 | |
---|
| 765 | /* Check for EOF and pad the string to 8 chars, if needed */ |
---|
| 766 | if (size == 0) |
---|
[9a4077c] | 767 | break; |
---|
[edae037] | 768 | if (size < 8) |
---|
| 769 | memset(input + size, 0, 8 - size); |
---|
| 770 | |
---|
| 771 | /* Encrypt and output the block */ |
---|
[356465e] | 772 | des_ecb_encrypt(&input, &output, schedule, TRUE); |
---|
[edae037] | 773 | block_to_ascii(output, outfile); |
---|
| 774 | |
---|
| 775 | if (size < 8) |
---|
| 776 | break; |
---|
| 777 | } |
---|
| 778 | |
---|
[9a4077c] | 779 | putc('\n', outfile); |
---|
[edae037] | 780 | |
---|
[9a4077c] | 781 | return TRUE; |
---|
[edae037] | 782 | } |
---|
| 783 | |
---|
[e832a52] | 784 | int do_encrypt_aes(const char *keyfile, const char *in, int length, FILE *outfile) |
---|
[8bd190d] | 785 | { |
---|
| 786 | char *out; |
---|
| 787 | int err, status; |
---|
| 788 | const char *argv[] = { |
---|
| 789 | "gpg", |
---|
| 790 | "--symmetric", |
---|
[048b1ff] | 791 | "--no-options", |
---|
| 792 | "--no-default-keyring", |
---|
| 793 | "--keyring", "/dev/null", |
---|
| 794 | "--secret-keyring", "/dev/null", |
---|
[8bd190d] | 795 | "--batch", |
---|
| 796 | "--quiet", |
---|
| 797 | "--no-use-agent", |
---|
| 798 | "--armor", |
---|
| 799 | "--cipher-algo", "AES", |
---|
| 800 | "--passphrase-file", keyfile, |
---|
| 801 | NULL |
---|
| 802 | }; |
---|
[97cdbaf5] | 803 | err = call_filter(argv, in, &out, &status); |
---|
[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; |
---|
| 872 | const char *argv[] = { |
---|
| 873 | "gpg", |
---|
| 874 | "--decrypt", |
---|
[048b1ff] | 875 | "--no-options", |
---|
| 876 | "--no-default-keyring", |
---|
| 877 | "--keyring", "/dev/null", |
---|
| 878 | "--secret-keyring", "/dev/null", |
---|
[8bd190d] | 879 | "--batch", |
---|
| 880 | "--no-use-agent", |
---|
| 881 | "--quiet", |
---|
| 882 | "--passphrase-file", keyfile, |
---|
| 883 | NULL |
---|
| 884 | }; |
---|
| 885 | int err, status; |
---|
| 886 | |
---|
| 887 | in = slurp_stdin(TRUE, &length); |
---|
| 888 | if(!in) return FALSE; |
---|
| 889 | |
---|
[97cdbaf5] | 890 | err = call_filter(argv, in, &out, &status); |
---|
[d72ba1e] | 891 | free(in); |
---|
[8bd190d] | 892 | if(err || status) { |
---|
[3b8a563] | 893 | g_free(out); |
---|
[8bd190d] | 894 | return FALSE; |
---|
| 895 | } |
---|
| 896 | fwrite(out, strlen(out), 1, stdout); |
---|
| 897 | g_free(out); |
---|
| 898 | |
---|
| 899 | return TRUE; |
---|
| 900 | } |
---|
| 901 | |
---|
[e832a52] | 902 | int do_decrypt_des(const char *keyfile) { |
---|
[edae037] | 903 | des_key_schedule schedule; |
---|
[356465e] | 904 | unsigned char input[8], output[8]; |
---|
[60fcd71] | 905 | char tmp[9]; |
---|
[8bd190d] | 906 | char *keystring; |
---|
[edae037] | 907 | |
---|
[60fcd71] | 908 | /* |
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| 909 | DES decrypts 8 bytes at a time. We copy those over into the 9-byte |
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| 910 | 'tmp', which has the final byte zeroed, to ensure that we always |
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| 911 | have a NULL-terminated string we can call printf/strlen on. |
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| 912 | |
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| 913 | We don't pass 'tmp' to des_ecb_encrypt directly, because it's |
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| 914 | prototyped as taking 'unsigned char[8]', and this avoids a stupid |
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| 915 | cast. |
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| 916 | |
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| 917 | We zero 'tmp' entirely, not just the final byte, in case there are |
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| 918 | no input blocks. |
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| 919 | */ |
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| 920 | memset(tmp, 0, sizeof tmp); |
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[edae037] | 921 | |
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[8bd190d] | 922 | keystring = read_keystring(keyfile); |
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| 923 | if(!keystring) return FALSE; |
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| 924 | |
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[c836519] | 925 | owl_zcrypt_string_to_schedule(keystring, &schedule); |
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[edae037] | 926 | |
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[8bd190d] | 927 | free(keystring); |
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| 928 | |
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[edae037] | 929 | while (read_ascii_block(input)) |
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| 930 | { |
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[356465e] | 931 | des_ecb_encrypt(&input, &output, schedule, FALSE); |
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[60fcd71] | 932 | memcpy(tmp, output, 8); |
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| 933 | printf("%s", tmp); |
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[edae037] | 934 | } |
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| 935 | |
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[60fcd71] | 936 | if (!tmp[0] || tmp[strlen(tmp) - 1] != '\n') |
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[edae037] | 937 | printf("\n"); |
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[9a4077c] | 938 | return TRUE; |
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[edae037] | 939 | } |
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