1 /* 2 * OpenBSD S/Key (skey.h) 3 * 4 * Authors: 5 * Neil M. Haller <nmh@thumper.bellcore.com> 6 * Philip R. Karn <karn@chicago.qualcomm.com> 7 * John S. Walden <jsw@thumper.bellcore.com> 8 * Scott Chasin <chasin@crimelab.com> 9 * Todd C. Miller <millert@openbsd.org> 10 * 11 * Main client header 12 * 13 * $OpenBSD: skey.h,v 1.22 2019/01/25 00:19:26 millert Exp $ 14 */ 15 16 #ifndef _SKEY_H_ 17 #define _SKEY_H_ 1 18 19 #include <dirent.h> 20 21 /* Server-side data structure for reading keys file during login */ 22 struct skey { 23 FILE *keyfile; 24 DIR *keydir; 25 char *logname; 26 char *seed; 27 char *val; 28 unsigned int n; 29 char buf[256]; 30 }; 31 32 /* Client-side structure for scanning data stream for challenge */ 33 struct mc { 34 int skip; 35 int cnt; 36 char buf[256]; 37 }; 38 39 /* Maximum sequence number we allow */ 40 #define SKEY_MAX_SEQ 10000 41 42 /* Minimum secret password length (rfc2289) */ 43 #define SKEY_MIN_PW_LEN 10 44 45 /* Max secret password length (rfc2289 says 63 but allows more) */ 46 #define SKEY_MAX_PW_LEN 255 47 48 /* Max length of an S/Key seed (rfc2289) */ 49 #define SKEY_MAX_SEED_LEN 16 50 51 /* Max length of S/Key challenge (otp-???? 9999 seed) */ 52 #define SKEY_MAX_CHALLENGE (11 + SKEY_MAX_HASHNAME_LEN + SKEY_MAX_SEED_LEN) 53 54 /* Max length of hash algorithm name (md5/sha1/rmd160) */ 55 #define SKEY_MAX_HASHNAME_LEN 6 56 57 /* Size of a binary key (not NULL-terminated) */ 58 #define SKEY_BINKEY_SIZE 8 59 60 /* Directory for S/Key per-user files */ 61 #define _PATH_SKEYDIR "/etc/skey" 62 63 __BEGIN_DECLS 64 void f(char *); 65 int keycrunch(char *, char *, char *); 66 char *btoe(char *, char *); 67 char *put8(char *, char *); 68 int etob(char *, char *); 69 void rip(char *); 70 int skeychallenge(struct skey *, char *, char *); 71 int skeychallenge2(int, struct skey *, char *, char *); 72 int skeylookup(struct skey *, char *); 73 int skeyverify(struct skey *, char *); 74 int skeyzero(struct skey *); 75 void sevenbit(char *); 76 void backspace(char *); 77 char *skipspace(char *); 78 char *readpass(char *, int); 79 char *readskey(char *, int); 80 int skey_authenticate(char *); 81 int skey_passcheck(char *, char *); 82 char *skey_keyinfo(char *); 83 int skey_haskey(char *); 84 int atob8(char *, char *); 85 int btoa8(char *, char *); 86 int htoi(int); 87 const char *skey_get_algorithm(void); 88 char *skey_set_algorithm(char *); 89 int skeygetnext(struct skey *); 90 int skey_unlock(struct skey *); 91 __END_DECLS 92 93 #endif /* _SKEY_H_ */ 94