diff options
Diffstat (limited to 'resolv/ns_print.c')
| -rw-r--r-- | resolv/ns_print.c | 203 |
1 files changed, 154 insertions, 49 deletions
diff --git a/resolv/ns_print.c b/resolv/ns_print.c index b0b7a1046e..36d39784a5 100644 --- a/resolv/ns_print.c +++ b/resolv/ns_print.c @@ -1,4 +1,5 @@ /* + * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1996-1999 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any @@ -34,11 +35,7 @@ static const char rcsid[] = "$BINDId: ns_print.c,v 8.18 2000/02/29 05:48:12 vixi #include <string.h> #include <ctype.h> -#ifdef SPRINTF_CHAR -# define SPRINTF(x) strlen(sprintf/**/x) -#else -# define SPRINTF(x) ((size_t)sprintf x) -#endif +#define SPRINTF(x) ((size_t)sprintf x) /* Forward. */ @@ -54,11 +51,7 @@ static int addstr(const char *src, size_t len, static int addtab(size_t len, size_t target, int spaced, char **buf, size_t *buflen); -/* Proto. */ - -#ifndef _LIBC -u_int16_t dst_s_dns_key_id(const u_char *, const int); -#endif +static u_int16_t dst_s_dns_key_id(const u_char *, const int); /* Macros. */ @@ -70,12 +63,11 @@ u_int16_t dst_s_dns_key_id(const u_char *, const int); /* Public. */ -/* - * int - * ns_sprintrr(handle, rr, name_ctx, origin, buf, buflen) +/*% * Convert an RR to presentation format. + * * return: - * Number of characters written to buf, or -1 (check errno). + *\li Number of characters written to buf, or -1 (check errno). */ int ns_sprintrr(const ns_msg *handle, const ns_rr *rr, @@ -90,14 +82,13 @@ ns_sprintrr(const ns_msg *handle, const ns_rr *rr, name_ctx, origin, buf, buflen); return (n); } +libresolv_hidden_def (ns_sprintrr) -/* - * int - * ns_sprintrrf(msg, msglen, name, class, type, ttl, rdata, rdlen, - * name_ctx, origin, buf, buflen) +/*% * Convert the fields of an RR into presentation format. + * * return: - * Number of characters written to buf, or -1 (check errno). + *\li Number of characters written to buf, or -1 (check errno). */ int ns_sprintrrf(const u_char *msg, size_t msglen, @@ -122,14 +113,17 @@ ns_sprintrrf(const u_char *msg, size_t msglen, T(addstr("\t\t\t", 3, &buf, &buflen)); } else { len = prune_origin(name, origin); - if (len == 0) { + if (*name == '\0') { + goto root; + } else if (len == 0) { T(addstr("@\t\t\t", 4, &buf, &buflen)); } else { T(addstr(name, len, &buf, &buflen)); /* Origin not used or not root, and no trailing dot? */ if (((origin == NULL || origin[0] == '\0') || - (origin[0] != '.' && origin[1] != '\0' && - name[len] == '\0')) && name[len - 1] != '.') { + (origin[0] != '.' && origin[1] != '\0' && + name[len] == '\0')) && name[len - 1] != '.') { + root: T(addstr(".", 1, &buf, &buflen)); len++; } @@ -151,7 +145,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen, */ switch (type) { case ns_t_a: - if (rdlen != NS_INADDRSZ) + if (rdlen != (size_t)NS_INADDRSZ) goto formerr; (void) inet_ntop(AF_INET, rdata, buf, buflen); addlen(strlen(buf), &buf, &buflen); @@ -163,6 +157,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen, case ns_t_mr: case ns_t_ns: case ns_t_ptr: + case ns_t_dname: T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); break; @@ -254,7 +249,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen, case ns_t_rt: { u_int t; - if (rdlen < NS_INT16SZ) + if (rdlen < (size_t)NS_INT16SZ) goto formerr; /* Priority. */ @@ -272,7 +267,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen, case ns_t_px: { u_int t; - if (rdlen < NS_INT16SZ) + if (rdlen < (size_t)NS_INT16SZ) goto formerr; /* Priority. */ @@ -310,9 +305,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen, break; case ns_t_nsap: { - /* 2*255 for hex digits, 128 for '.' and '\0', 2 for - 0x if inet_nsap_ntoa starts using it. */ - char t[255*2 + 128 + 2]; + char t[2+255*3]; (void) inet_nsap_ntoa(rdlen, rdata, t); T(addstr(t, strlen(t), &buf, &buflen)); @@ -320,7 +313,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen, } case ns_t_aaaa: - if (rdlen != NS_IN6ADDRSZ) + if (rdlen != (size_t)NS_IN6ADDRSZ) goto formerr; (void) inet_ntop(AF_INET6, rdata, buf, buflen); addlen(strlen(buf), &buf, &buflen); @@ -339,7 +332,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen, u_int order, preference; char t[50]; - if (rdlen < 2*NS_INT16SZ) + if (rdlen < 2U*NS_INT16SZ) goto formerr; /* Order, Precedence. */ @@ -380,7 +373,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen, u_int priority, weight, port; char t[50]; - if (rdlen < NS_INT16SZ*3) + if (rdlen < 3U*NS_INT16SZ) goto formerr; /* Priority, Weight, Port. */ @@ -409,7 +402,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen, case ns_t_wks: { int n, lcnt; - if (rdlen < NS_INT32SZ + 1) + if (rdlen < 1U + NS_INT32SZ) goto formerr; /* Address. */ @@ -448,13 +441,12 @@ ns_sprintrrf(const u_char *msg, size_t msglen, } case ns_t_key: { -#ifndef _LIBC char base64_key[NS_MD5RSA_MAX_BASE64]; u_int keyflags, protocol, algorithm, key_id; const char *leader; int n; - if (rdlen < NS_INT16SZ + NS_INT8SZ + NS_INT8SZ) + if (rdlen < 0U + NS_INT16SZ + NS_INT8SZ + NS_INT8SZ) goto formerr; /* Key flags, Protocol, Algorithm. */ @@ -486,20 +478,18 @@ ns_sprintrrf(const u_char *msg, size_t msglen, T(addstr(" )", 2, &buf, &buflen)); n = SPRINTF((tmp, " ; key_tag= %u", key_id)); T(addstr(tmp, n, &buf, &buflen)); -#endif /* !_LIBC */ break; } case ns_t_sig: { -#ifndef _LIBC char base64_key[NS_MD5RSA_MAX_BASE64]; u_int type, algorithm, labels, footprint; const char *leader; u_long t; int n; - if (rdlen < 22) + if (rdlen < 22U) goto formerr; /* Type covered, Algorithm, Label count, Original TTL. */ @@ -549,7 +539,6 @@ ns_sprintrrf(const u_char *msg, size_t msglen, } if (len > 15) T(addstr(" )", 2, &buf, &buflen)); -#endif /* !_LIBC */ break; } @@ -571,8 +560,10 @@ ns_sprintrrf(const u_char *msg, size_t msglen, case ns_t_cert: { u_int c_type, key_tag, alg; - int n, siz; - char base64_cert[8192], *leader, tmp[40]; + int n; + unsigned int siz; + char base64_cert[8192], tmp[40]; + const char *leader; c_type = ns_get16(rdata); rdata += NS_INT16SZ; key_tag = ns_get16(rdata); rdata += NS_INT16SZ; @@ -582,7 +573,7 @@ ns_sprintrrf(const u_char *msg, size_t msglen, T(addstr(tmp, len, &buf, &buflen)); siz = (edata-rdata)*4/3 + 4; /* "+4" accounts for trailing \0 */ if (siz > sizeof(base64_cert) * 3/4) { - char *str = "record too long to print"; + const char *str = "record too long to print"; T(addstr(str, strlen(str), &buf, &buflen)); } else { @@ -610,16 +601,47 @@ ns_sprintrrf(const u_char *msg, size_t msglen, break; } + case ns_t_tkey: { + /* KJD - need to complete this */ + u_long t; + int mode, err, keysize; + + /* Algorithm name. */ + T(addname(msg, msglen, &rdata, origin, &buf, &buflen)); + T(addstr(" ", 1, &buf, &buflen)); + + /* Inception. */ + t = ns_get32(rdata); rdata += NS_INT32SZ; + len = SPRINTF((tmp, "%s ", p_secstodate(t))); + T(addstr(tmp, len, &buf, &buflen)); + + /* Experation. */ + t = ns_get32(rdata); rdata += NS_INT32SZ; + len = SPRINTF((tmp, "%s ", p_secstodate(t))); + T(addstr(tmp, len, &buf, &buflen)); + + /* Mode , Error, Key Size. */ + /* Priority, Weight, Port. */ + mode = ns_get16(rdata); rdata += NS_INT16SZ; + err = ns_get16(rdata); rdata += NS_INT16SZ; + keysize = ns_get16(rdata); rdata += NS_INT16SZ; + len = SPRINTF((tmp, "%u %u %u ", mode, err, keysize)); + T(addstr(tmp, len, &buf, &buflen)); + + /* XXX need to dump key, print otherdata length & other data */ + break; + } + case ns_t_tsig: { /* BEW - need to complete this */ int n; T(len = addname(msg, msglen, &rdata, origin, &buf, &buflen)); T(addstr(" ", 1, &buf, &buflen)); - rdata += 8; /* time */ + rdata += 8; /*%< time */ n = ns_get16(rdata); rdata += INT16SZ; - rdata += n; /* sig */ - n = ns_get16(rdata); rdata += INT16SZ; /* original id */ + rdata += n; /*%< sig */ + n = ns_get16(rdata); rdata += INT16SZ; /*%< original id */ sprintf(buf, "%d", ns_get16(rdata)); rdata += INT16SZ; addlen(strlen(buf), &buf, &buflen); @@ -677,7 +699,8 @@ ns_sprintrrf(const u_char *msg, size_t msglen, int n, m; char *p; - len = SPRINTF((tmp, "\\#(\t\t; %s", comment)); + len = SPRINTF((tmp, "\\# %u%s\t; %s", (unsigned)(edata - rdata), + rdlen != 0U ? " (" : "", comment)); T(addstr(tmp, len, &buf, &buflen)); while (rdata < edata) { p = tmp; @@ -703,10 +726,11 @@ ns_sprintrrf(const u_char *msg, size_t msglen, return (buf - obuf); } } +libresolv_hidden_def (ns_sprintrrf) /* Private. */ -/* +/*% * size_t * prune_origin(name, origin) * Find out if the name is at or under the current origin. @@ -739,7 +763,7 @@ prune_origin(const char *name, const char *origin) { return (name - oname); } -/* +/*% * int * charstr(rdata, edata, buf, buflen) * Format a <character-string> into the presentation buffer. @@ -795,9 +819,11 @@ addname(const u_char *msg, size_t msglen, n = dn_expand(msg, msg + msglen, *pp, *buf, *buflen); if (n < 0) - goto enospc; /* Guess. */ + goto enospc; /*%< Guess. */ newlen = prune_origin(*buf, origin); - if (newlen == 0) { + if (**buf == '\0') { + goto root; + } else if (newlen == 0U) { /* Use "@" instead of name. */ if (newlen + 2 > *buflen) goto enospc; /* No room for "@\0". */ @@ -808,6 +834,7 @@ addname(const u_char *msg, size_t msglen, (origin[0] != '.' && origin[1] != '\0' && (*buf)[newlen] == '\0')) && (*buf)[newlen - 1] != '.') { /* No trailing dot. */ + root: if (newlen + 2 > *buflen) goto enospc; /* No room for ".\0". */ (*buf)[newlen++] = '.'; @@ -864,3 +891,81 @@ addtab(size_t len, size_t target, int spaced, char **buf, size_t *buflen) { } return (spaced); } + +/* DST algorithm codes */ +#define KEY_RSA 1 +#define KEY_HMAC_MD5 157 + +/*% + * calculates a checksum used in dst for an id. + * takes an array of bytes and a length. + * returns a 16 bit checksum. + */ +static u_int16_t +dst_s_id_calc(const u_char *key, const int keysize) +{ + u_int32_t ac; + const u_char *kp = key; + int size = keysize; + + if (!key || (keysize <= 0)) + return (0xffffU); + + for (ac = 0; size > 1; size -= 2, kp += 2) + ac += ((*kp) << 8) + *(kp + 1); + + if (size > 0) + ac += ((*kp) << 8); + ac += (ac >> 16) & 0xffff; + + return (ac & 0xffff); +} + +/*% + * dst_s_get_int16 + * This routine extracts a 16 bit integer from a two byte character + * string. The character string is assumed to be in network byte + * order and may be unaligned. The number returned is in host order. + * Parameter + * buf A two byte character string. + * Return + * The converted integer value. + */ + +static u_int16_t +dst_s_get_int16(const u_char *buf) +{ + register u_int16_t a = 0; + a = ((u_int16_t)(buf[0] << 8)) | ((u_int16_t)(buf[1])); + return (a); +} + +/*% + * dst_s_dns_key_id() Function to calculate DNSSEC footprint from KEY record + * rdata + * Input: + * dns_key_rdata: the raw data in wire format + * rdata_len: the size of the input data + * Output: + * the key footprint/id calculated from the key data + */ +static u_int16_t +dst_s_dns_key_id(const u_char *dns_key_rdata, const int rdata_len) +{ + if (!dns_key_rdata) + return 0; + + /* compute id */ + if (dns_key_rdata[3] == KEY_RSA) /*%< Algorithm RSA */ + return dst_s_get_int16((const u_char *) + &dns_key_rdata[rdata_len - 3]); + else if (dns_key_rdata[3] == KEY_HMAC_MD5) + /* compatibility */ + return 0; + else + /* compute a checksum on the key part of the key rr */ + return dst_s_id_calc(dns_key_rdata, rdata_len); +} + + +/*! \file */ |