diff options
Diffstat (limited to 'usr.sbin/xntpd/lib/authreadkeys.c')
| -rw-r--r-- | usr.sbin/xntpd/lib/authreadkeys.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/usr.sbin/xntpd/lib/authreadkeys.c b/usr.sbin/xntpd/lib/authreadkeys.c new file mode 100644 index 0000000..5800186 --- /dev/null +++ b/usr.sbin/xntpd/lib/authreadkeys.c @@ -0,0 +1,191 @@ +/* authreadkeys.c,v 3.1 1993/07/06 01:07:57 jbj Exp + * authreadkeys.c - routines to support the reading of the key file + */ +#include <stdio.h> +#include <ctype.h> + +#include "ntp_stdlib.h" +#include "ntp_syslog.h" + +#ifdef DES +/* + * Types of ascii representations for keys. "Standard" means a 64 bit + * hex number in NBS format, i.e. with the low order bit of each byte + * a parity bit. "NTP" means a 64 bit key in NTP format, with the + * high order bit of each byte a parity bit. "Ascii" means a 1-to-8 + * character string whose ascii representation is used as the key. + */ +#define KEY_TYPE_STD 1 +#define KEY_TYPE_NTP 2 +#define KEY_TYPE_ASCII 3 +#endif + +#ifdef MD5 +/* + * Arbitrary LONG string of ASCII characters. + */ +#define KEY_TYPE_MD5 4 +#endif + +/* + * nexttok - basic internal tokenizing routine + */ +static char * +nexttok(str) + char **str; +{ + register char *cp; + char *starttok; + + cp = *str; + + /* + * Space past white space + */ + while (*cp == ' ' || *cp == '\t') + cp++; + + /* + * Save this and space to end of token + */ + starttok = cp; + while (*cp != '\0' && *cp != '\n' && *cp != ' ' + && *cp != '\t' && *cp != '#') + cp++; + + /* + * If token length is zero return an error, else set end of + * token to zero and return start. + */ + if (starttok == cp) + return 0; + + if (*cp == ' ' || *cp == '\t') + *cp++ = '\0'; + else + *cp = '\0'; + + *str = cp; + return starttok; +} + + +/* + * authreadkeys - (re)read keys from a file. + */ +int +authreadkeys(file) + const char *file; +{ + FILE *fp; + char *line; + char *token; + U_LONG keyno; + int keytype; + char buf[512]; /* lots of room for line? */ +extern FILE * fopen P((const char *filename, const char *type)); +extern int fclose P((FILE *stream)); + + /* + * Open file. Complain and return if it can't be opened. + */ + fp = fopen(file, "r"); + if (fp == NULL) { + syslog(LOG_ERR, "can't open key file %s: %m", file); + return 0; + } + + /* + * Remove all existing keys + */ + auth_delkeys(); + + /* + * Now read lines from the file, looking for key entries + */ + while ((line = fgets(buf, sizeof buf, fp)) != NULL) { + token = nexttok(&line); + if (token == 0) + continue; + + /* + * First is key number. See if it is okay. + */ + keyno = (U_LONG)atoi(token); + if (keyno == 0) { + syslog(LOG_ERR, + "cannot change keyid 0, key entry `%s' ignored", + token); + continue; + } + + /* + * Next is keytype. See if that is all right. + */ + token = nexttok(&line); + if (token == 0) { + syslog(LOG_ERR, + "no key type for key number %d, entry ignored", + keyno); + continue; + } + switch (*token) { +#ifdef DES + case 'S': + case 's': + keytype = KEY_TYPE_STD; break; + + case 'N': + case 'n': + keytype = KEY_TYPE_NTP; break; + + case 'A': + case 'a': + keytype = KEY_TYPE_ASCII; break; +#endif +#ifdef MD5 + case 'M': + case 'm': + keytype = KEY_TYPE_MD5; break; +#endif + default: + syslog(LOG_ERR, + "invalid key type for key number %d, entry ignored", + keyno); + continue; + } + + /* + * Finally, get key and insert it + */ + token = nexttok(&line); + if (token == 0) { + syslog(LOG_ERR, + "no key for number %d entry, entry ignored", + keyno); + } else { + switch(keytype) { +#ifdef DES + case KEY_TYPE_STD: + case KEY_TYPE_NTP: + case KEY_TYPE_ASCII: + if (!authusekey(keyno, keytype, token)) + syslog(LOG_ERR, + "format/parity error for DES key %d, not used", + keyno); + break; +#endif +#ifdef MD5 + case KEY_TYPE_MD5: + if (!authusekey(keyno, keytype, token)) + syslog(LOG_ERR, + "format/parity error for MD5 key %d, not used", + keyno); + break; +#endif + } + } + } + (void) fclose(fp); + return 1; +} |
