| blob | 9f430ac6d7dcfd4b19778882e43651d6fc7ed555 |
1 /* $NetBSD: put.c,v 1.12 2004/10/28 21:14:52 dsl Exp $ */
3 /* S/KEY v1.1b (put.c)
4 *
5 * Authors:
6 * Neil M. Haller <nmh@thumper.bellcore.com>
7 * Philip R. Karn <karn@chicago.qualcomm.com>
8 * John S. Walden <jsw@thumper.bellcore.com>
9 * Scott Chasin <chasin@crimelab.com>
10 *
11 * Dictionary lookup and extraction.
12 */
14 #include <sys/cdefs.h>
17 #include <stdio.h>
18 #include <string.h>
19 #include <assert.h>
20 #include <ctype.h>
21 #include <sys/types.h>
29 /* Dictionary for integer-word translations */
2078 "YOKE"
2079 };
2081 /* Encode 8 bytes in 'c' as a string of English words.
2082 * Returns a pointer to a static buffer
2083 */
2085 {
2091 /* compute parity */
2109 #ifdef notdef
2111 #endif
2113 }
2115 /* convert English to binary
2116 * returns 1 OK - all good words and parity is OK
2117 * 0 word not in data base
2118 * -1 badly formed in put ie > 4 char word
2119 * -2 words OK but parity is wrong
2120 */
2122 {
2136 {
2144 {
2147 }
2148 else
2149 {
2152 }
2159 }
2161 /* now check the parity of what we got */
2171 }
2173 /* Display 8 bytes as a series of 16-bit hex digits */
2175 {
2181 }
2183 #ifdef notdef
2184 /* Encode 8 bytes in 'cp' as stream of ascii letters.
2185 * Provided as a possible alternative to btoe()
2186 */
2188 {
2192 /* code out put by characters 6 bits each added to 0x21 (!) */
2194 {
2195 /* last one is only 4 bits not 6 */
2197 }
2200 }
2202 #endif
2204 /* Internal subroutines for word encoding/decoding */
2206 /* Dictionary binary search */
2208 {
2212 {
2217 {
2218 /* Avoid effects of integer truncation in /2 */
2221 else
2223 }
2228 else
2230 }
2231 }
2234 {
2252 {
2256 }
2258 {
2261 }
2262 else
2263 {
2265 }
2266 }
2269 {
2271 {
2282 word++;
2283 }
2284 }
2286 /* Extract 'length' bits from the char array 's' starting with bit 'start' */
2288 {
2306 }