| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * Passphrase pixie definitions (Unix-specific) |
| 4 | * |
| 5 | * (c) 1999 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of Catacomb. |
| 11 | * |
| 12 | * Catacomb is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU Library General Public License as |
| 14 | * published by the Free Software Foundation; either version 2 of the |
| 15 | * License, or (at your option) any later version. |
| 16 | * |
| 17 | * Catacomb is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU Library General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU Library General Public |
| 23 | * License along with Catacomb; if not, write to the Free |
| 24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 25 | * MA 02111-1307, USA. |
| 26 | */ |
| 27 | |
| 28 | #ifndef CATACOMB_PIXIE_H |
| 29 | #define CATACOMB_PIXIE_H |
| 30 | |
| 31 | #ifdef __cplusplus |
| 32 | extern "C" { |
| 33 | #endif |
| 34 | |
| 35 | /*----- Header files ------------------------------------------------------*/ |
| 36 | |
| 37 | #include <stddef.h> |
| 38 | |
| 39 | #include <sys/socket.h> |
| 40 | #include <sys/un.h> |
| 41 | |
| 42 | #ifndef CATACOMB_PASSPHRASE_H |
| 43 | # include "passphrase.h" |
| 44 | #endif |
| 45 | |
| 46 | /*----- Protocol definition -----------------------------------------------* |
| 47 | * |
| 48 | * The protocol is simple and text-based. The client connects to the |
| 49 | * server's socket and sends `request lines', each of which elicits one or |
| 50 | * more `response lines' from the server. Request and response lines contain |
| 51 | * whitespace-separated fields, and are terminated by a single linefeed. The |
| 52 | * final field on a line may contain whitespace. The first field describes |
| 53 | * the type of the line. The type field is not case-sensitive, although |
| 54 | * writing them in uppercase is conventional. |
| 55 | * |
| 56 | * The requests are: |
| 57 | * |
| 58 | * HELP |
| 59 | * Provide (very) brief help with the pixie protocol. |
| 60 | * |
| 61 | * LIST |
| 62 | * Return a list of passphrases currently stored, together with expiry |
| 63 | * information. |
| 64 | * |
| 65 | * PASS tag [expire] |
| 66 | * Request the passphrase named `tag' from the pixie. |
| 67 | * |
| 68 | * VERIFY tag [expire] |
| 69 | * Request a new passphrase, which therefore requires verification. |
| 70 | * |
| 71 | * SET tag [expire] -- phrase |
| 72 | * Set the value of passphrase `tag'. This will usually be a follow-up |
| 73 | * to a MISSING response. |
| 74 | * |
| 75 | * FLUSH [tag] |
| 76 | * Flush the passphrase named `tag', or all passphrases, from memory. |
| 77 | * |
| 78 | * QUIT |
| 79 | * Requests that the pixie close down. |
| 80 | * |
| 81 | * Response lines are as follows: |
| 82 | * |
| 83 | * OK [phrase] |
| 84 | * Request completed successfully. If a passphrase was requested, it is |
| 85 | * returned by the pixie. This is the final response to a request. |
| 86 | * |
| 87 | * MISSING |
| 88 | * The passphrase requested is not known, and no requester mechanism is |
| 89 | * present. The client should request the passphrase itself and pass it |
| 90 | * back to the pixie. This is the final response to a request. |
| 91 | * |
| 92 | * FAIL error |
| 93 | * Reports an error. The message given is intended to be |
| 94 | * human-readable. This is the final response to a request. |
| 95 | * |
| 96 | * INFO message |
| 97 | * Reports a human-readable informational message. Further responses |
| 98 | * follow. |
| 99 | * |
| 100 | * ITEM tag expires |
| 101 | * Reports a passphrase in response to a LIST request. One ITEM |
| 102 | * response is given for each passphrase currently in memory. An OK or |
| 103 | * FAIL response follows the last ITEM. |
| 104 | * |
| 105 | * Expiry times in requests may be given in any format acceptable to |
| 106 | * `getdate'. Expiry times in responses are returned in ISO format |
| 107 | * (YYYY-MM-DD HH:MM:SS ZZZ) and are expressed relative to local time. |
| 108 | */ |
| 109 | |
| 110 | /*----- Functions provided ------------------------------------------------*/ |
| 111 | |
| 112 | /* --- @pixie_open@ --- * |
| 113 | * |
| 114 | * Arguments: @const char *sock@ = path to pixie socket |
| 115 | * |
| 116 | * Returns: Less than zero if it failed, or file descriptor. |
| 117 | * |
| 118 | * Use: Opens a connection to a passphrase pixie. |
| 119 | */ |
| 120 | |
| 121 | extern int pixie_open(const char */*sock*/); |
| 122 | |
| 123 | /* --- @pixie_read@ --- * |
| 124 | * |
| 125 | * Arguments: @int fd@ = connection to passphrase pixie |
| 126 | * @const char *tag@ = pointer to tag string |
| 127 | * @unsigned mode@ = reading mode |
| 128 | * @char *buf@ = pointer to destination buffer |
| 129 | * @size_t sz@ = size of the buffer |
| 130 | * |
| 131 | * Returns: Zero if all went well, @-1@ if the read fails, @+1@ to |
| 132 | * request the passphrase from the user. |
| 133 | * |
| 134 | * Use: Reads a passphrase from the pixie. |
| 135 | */ |
| 136 | |
| 137 | extern int pixie_read(int /*fd*/, const char */*tag*/, unsigned /*mode*/, |
| 138 | char */*buf*/, size_t /*sz*/); |
| 139 | |
| 140 | /* --- @pixie_set@ --- * |
| 141 | * |
| 142 | * Arguments: @int fd@ = pixie file descriptor |
| 143 | * @const char *tag@ = pointer to tag string |
| 144 | * @const char *phrase@ = pointer to passphrase string |
| 145 | * |
| 146 | * Returns: --- |
| 147 | * |
| 148 | * Use: Sends a passphrase to the passphrase pixie. |
| 149 | */ |
| 150 | |
| 151 | extern void pixie_set(int /*fd*/, const char */*tag*/, |
| 152 | const char */*phrase*/); |
| 153 | |
| 154 | /* --- @pixie_cancel@ --- * |
| 155 | * |
| 156 | * Arguments: @int fd@ = pixie file descriptor |
| 157 | * @const char *tag@ = pointer to tag string |
| 158 | * |
| 159 | * Returns: --- |
| 160 | * |
| 161 | * Use: Cancels a passphrase if it turns out to be bogus. |
| 162 | */ |
| 163 | |
| 164 | extern void pixie_cancel(int /*fd*/, const char */*tag*/); |
| 165 | |
| 166 | /* --- @pixie_address@ --- * |
| 167 | * |
| 168 | * Arguments: @const char *sock@ = pointer to socket name |
| 169 | * @size_t *psz@ = where to write the address size |
| 170 | * |
| 171 | * Returns: Pointer to filled-in Unix-domain socket address. |
| 172 | * |
| 173 | * Use: Returns a Unix-domain socket address to use to find the |
| 174 | * passphrase pixie. |
| 175 | */ |
| 176 | |
| 177 | extern struct sockaddr_un *pixie_address(const char */*sock*/, |
| 178 | size_t */*psz*/); |
| 179 | |
| 180 | /* --- @pixie_fdline@ --- * |
| 181 | * |
| 182 | * Arguments: @int fd@ = file descriptor to read from |
| 183 | * @char *buf@ = pointer to buffer |
| 184 | * @size_t sz@ = size of buffer |
| 185 | * |
| 186 | * Returns: --- |
| 187 | * |
| 188 | * Use: Reads a line from a file descriptor. The read is done one |
| 189 | * character at a time. If the entire line won't fit, the end |
| 190 | * is truncated. The line is null terminated. |
| 191 | */ |
| 192 | |
| 193 | extern void pixie_fdline(int /*fd*/, char */*buf*/, size_t /*sz*/); |
| 194 | |
| 195 | /* --- @pixie_getpass@ --- * |
| 196 | * |
| 197 | * Arguments: @const char *prompt@ = pointer to prompt string |
| 198 | * @char *buf@ = pointer to buffer |
| 199 | * @size_t sz@ = size of buffer |
| 200 | * |
| 201 | * Returns: Zero if it worked OK, nonzero otherwise. |
| 202 | * |
| 203 | * Use: Reads a passphrase from the terminal or some other requested |
| 204 | * source. |
| 205 | */ |
| 206 | |
| 207 | extern int pixie_getpass(const char */*prompt*/, |
| 208 | char */*buf*/, size_t /*sz*/); |
| 209 | |
| 210 | /*----- That's all, folks -------------------------------------------------*/ |
| 211 | |
| 212 | #ifdef __cplusplus |
| 213 | } |
| 214 | #endif |
| 215 | |
| 216 | #endif |